Informacja

Drogi użytkowniku, aplikacja do prawidłowego działania wymaga obsługi JavaScript. Proszę włącz obsługę JavaScript w Twojej przeglądarce.

Wyszukujesz frazę "Ionizing" wg kryterium: Wszystkie pola


Tytuł:
The importance of the nuclear and cytoplasmic signalling in the cellular response to ionizing radiation
Autorzy:
Szumiel, I.
Powiązania:
https://bibliotekanauki.pl/articles/146716.pdf
Data publikacji:
2000
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
cellular signalling pathways
ionizing radiation
radiation sensitivity
Opis:
DNA is the universal primary target for ionizing radiation; however, the cellular response is highly diversified not only by differential DNA repair ability. The monitoring system for the ionizing radiation-inflicted DNA damage consists of 3 apparently independently acting enzymes which are activated by DNA breaks: two protein kinases, Atm (ataxia telangiectasia mutated) and DNA-PK (DNA-dependent protein kinase) and a poly(ADP-ribose) polymerase, PARP-1. These 3 enzymes are the source of alarm signals, which affect to various extents DNA repair, progression through the cell cycle and eventually the pathway to cell death. Their functions probably are partly over-lapping. On the side of DNA repair their role consists in recruiting and/or activating the repair enzymes, as well as preventing illegitimate recombination of the damaged sites. A large part of the nuclear signalling pathway, including the integrating role of Tp53 has been revealed. Two main signalling pathways start at the plasma membrane: the MAPK/ERK (mitogen and extracellular signal regulated protein kinase family) "survival pathway" and the SAPK/JNK (stress-activated protein kinase/c-Jun N-terminal kinase) "cell death pathway". The balance between them is likely to determine the cell’s fate. When DNA break rejoining is impaired, the cell is unconditionally radiation sensitive. The fate of a repair-competent cell is determined by the time factor: the cell cycle arrest should be long enough to ensure the completion of repair. Incomplete repair or misrepair may be tolerated, when generation of the death signal is prevented. So, the character and timing of the signals are, to a large part, responsible for the cellular intrinsic radiation sensitivity and depend on the characteristics of the cellular signalling web.
Źródło:
Nukleonika; 2000, 45, 4; 215-220
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ionizing radiation as a component of energy balance in electrical discharges in air and mineral oil
Autorzy:
Nagi, Ł.
Powiązania:
https://bibliotekanauki.pl/articles/114669.pdf
Data publikacji:
2016
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
ionizing radiation
electrical discharges
scintillator
energy balance
Opis:
The paper presents the results of research concerning electrical discharges generating ionizing radiation in air and oil. Ionizing radiation is an important component of energy balance in electrical discharges. In energetics and all other engineering sciences, the energy balance shows the flow of energy for a given technological process. Within it, the energy needs of the process and its effect are collated.
Źródło:
Measurement Automation Monitoring; 2016, 62, 4; 146-148
2450-2855
Pojawia się w:
Measurement Automation Monitoring
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ionizing radiation and volumetric mammographic density
Autorzy:
Pepłońska, Beata
Mirowski, Mateusz
Kałużny, Paweł
Domienik-Andrzejewska, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/2152984.pdf
Data publikacji:
2022
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
breast cancer
ionizing radiation
mammography
effective dose
mammographic density
organ dose
Opis:
Objectives Mammographic density (MD) refers to the percentage of dense tissue of an entire breast and was proposed to be used as a surrogate marker for breast cancer. High-dose ionizing radiation (IR) has been recognized as a breast cancer risk factor. The aim of our study was to investigate association between lifetime low dose ionizing radiation (LDIR) and MD. Material and Methods A cross-sectional study included 467 women aged 40–60 years who underwent screening mammography in Łódź, Poland. The digital mammography examination of the breasts included both craniocaudal and mediolateral oblique views. The volumetric breast density (VBD) (%) and fibrograndular tissue volume (FG) (cm3) were determined based on the analysis of mammographic image (“for processing”) using Volpara Imaging Software. The exposure to IR was estimated for each individual, based on the data from interviews about diagnostic or therapeutic medical procedures performed in the area of the neck, chest, abdomen and spine, which involved X-rays and γ rays and the data about the doses derived from literature. Linear and logistic regression were fitted with VBD and FG as the outcomes and organ breast dose, effective dose and number of mammographies as the determinants, adjusted for major confounders. Results The analyses showed no association between VBD or FG and the breast organ dose or the effective dose. The only significant finding observed concerned the association between the number of mammographies and the FG volume with β coefficient: 0.028 (95% CI: 0.012–0.043), and predicted mean FG volume >13.4 cm3 among the women with >3 mammographies when compared to those with none. Conclusions This study does not, in general, provide support for the positive association between LDIR and MD. The weak association of the FG volume with the number of mammographies warrants further verification in larger independent studies.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2022, 35, 5; 635-649
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Experimental assessment of ionizing radiation low doses impact on teeth development
Autorzy:
Cheshko, N. N.
Berlov, H. A.
Pohodenko-Chudakova, I. O.
Powiązania:
https://bibliotekanauki.pl/articles/285397.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
ionizing radiation
teeth development
laboratory experiment
Źródło:
Engineering of Biomaterials; 2009, 12, no. 89-91; 8-9
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Does occupational exposure to low ionizing radiation affect endothelium health?
Autorzy:
Al-Massarani, G.
Najjar, F.
Powiązania:
https://bibliotekanauki.pl/articles/147716.pdf
Data publikacji:
2013
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
circulating endothelial cells (CEC)
occupational exposure
low-dose ionizing radiation
Opis:
The aim of this study was to assess the effect of low-radiation exposure on detachment of the vascular endothelial cells. Circulating endothelial cells (CEC) were measured in the peripheral blood by an immunomagnetic separation (IMS) technique in 63 workers occupationally exposed to low-level ionizing radiation at the Atomic Energy Commission of Syria and in 28 controls. We found a significant difference in CEC numbers in the peripheral blood of the workers exposed to low-level ionizing radiation in comparison with those of the control samples (p = 0.0001) and no significant difference in the proportion of other blood elements in the peripheral circulation. Elevated number of CEC in occupational workers exposed to low doses of ionizing radiation may reflect an early affection of the endothelium. Long-term follow-up of these workers must be conducted to determine the clinical value of CEC as an early indicator of cardiovascular disease induced as a result of chronic occupational exposure to low doses of ionizing radiation.
Źródło:
Nukleonika; 2013, 58, 4; 527-531
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of ionizing radiation low doses on early stages of odontogenesis
Autorzy:
Cheshko, N. N.
Berlov, H. A.
Pohodenko-Chudakova, I. O.
Powiązania:
https://bibliotekanauki.pl/articles/285617.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
odontogenesis
ionizing radiation low doses
tooth germ
Źródło:
Engineering of Biomaterials; 2008, 11, no. 77-80; 7-8
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
CMOS Readout Circuit Integrated with Ionizing Radiation Detectors
Autorzy:
Szymański, A.
Obrębski, D.
Marczewski, J.
Tomaszewski, D.
Grodner, M.
Pieczyński, J.
Powiązania:
https://bibliotekanauki.pl/articles/226502.pdf
Data publikacji:
2014
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
readout electronics
ASIC
SOI
ionizing radiation detectors
Opis:
This paper describes the work performed in ITE on integration in one CMOS chip the ionizing radiation detectors with dedicated readout electronics. At the beginning, some realizations of silicon detectors of ionizing radiation are presented together with most important issues related to these devices. Next, two developed test structures for readout electronics are discussed in detail together with main features of non-typical silicon proces deployed.
Źródło:
International Journal of Electronics and Telecommunications; 2014, 60, 1; 117-124
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of ionizing radiation on the male reproductive system
Autorzy:
Wdowiak, A.
Skrzypek, M.
Stec, M.
Panasiuk, L.
Powiązania:
https://bibliotekanauki.pl/articles/2083104.pdf
Data publikacji:
2019
Wydawca:
Instytut Medycyny Wsi
Tematy:
radiation protection
ionizing radiation
male fertility
human reproductive function
medical exposure
natural exposure
Opis:
Introduction and objective. In the light of current data concerning the growing exposure to ionizing radiation (IR) originating from atrificial sources, especially from medical ones, and also related to occupational exposure, it is justifiable to systematize the state of knowledge concerning the effect of IR on the male reproductive system. Brief description of the state of knowledge. There is no basis for the application of the hypothesis of hormesis in the area of male reproductive health. Regarding the impact of IR on spermatogenesis, spermatogonia are less susceptible to the occurrence of DNA damage after exposition to IR, but are characterized by slower DNA repair compared to somatic cells. Damage to the genes after exposure to IR is possible at each stage of spermatogenesis; however, haploidal spermatids show the highest radiosensitivity in this respect. The genetic risk of the cells differentiating during spermatogenesis is limited to one cycle of spermatogenesis, whereas the genetic instability may persist for the whole period of life, and DNA damage induced by IR may be transmitted to future generations. The minimum dose causing detectable DNA damage was 30 Gy. While exceeding this dose, the number of single-strand DNA breaks increases. Among males exposed to IR, a decrease was observed in sperm motility and in the percentage of morphologically normal spermatozoa as well as in an intensification of vacuolization. The genetic material in the sperm of these males showed higher fragmentation and methylation of genomic DNA. Conclusion. In the context of the epidemiological situation concerning the prevalence of infertility, while assessing the health effects of exposure to IR from artificial, including medical sources, the reproductive risk should be considered.
Źródło:
Annals of Agricultural and Environmental Medicine; 2019, 26, 2; 210-216
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of ionizing radiation on the female reproductive system
Autorzy:
Skrzypek, M.
Wdowiak, A.
Panasiuk, L.
Stec, M.
Szczygieł, K.
Zybała, M.
Filip, M.
Powiązania:
https://bibliotekanauki.pl/articles/2085209.pdf
Data publikacji:
2019
Wydawca:
Instytut Medycyny Wsi
Tematy:
infertility
ionizing radiation
female reproductive health
gonadotoxic action
Opis:
Introduction and objective. The tendency towards postponement of maternity implies a greater exposure of female germ cells to damaging environmental effects, including ionizing radiation (IR). Progress in paediatric oncology, based on the use of radiotherapy, also implies the occurrence of gonadal dysfunctions and subsequent female fertility disorders. Therefore, it seems justifiable to systematize the state of knowledge concerning the effect of IR on the female reproductive system. Brief description of the state of knowledge. A considerable part of studies concerning the effect of IR on female germ cells have been conducted on animals. Their extrapolation to humans is hindered because in animal studies high acute exposures are applied, which do not reflect human environmental exposures characterized by chronic low dose exposure. Studies on animals provide a heterogenous image, which hinders the formulation of unequivocal conclusions and indicates that radiosensitivity depends, i.a. on IR dose, stage of development of oocytes, the applied marker of the effects of IR, or on the species. LD50 of human oocytes is estimated to be below 2 Gy. The effect of IR depends, i.a. on the dose fractionation and the age (older women are more radiosensitive). In females, the effective sterilizing dose is: at birth 20.3 Gy, at 10 years 18.4 Gy, at 20 years 16.5 Gy, whereas at 30 years 14.3 Gy, which is associated with the available pool of ovarian follicles. Conclusions. Within the range of low doses received as a result of environmental exposure to IR, there is no evidence for the occurrence of either adverse pregnancy outcomes, nor fertility disorders in females. These effects may be related to the cancer radiotherapy, or exposure to high IR doses during nuclear accidents.
Źródło:
Annals of Agricultural and Environmental Medicine; 2019, 26, 4; 606-616
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Nuclear magnetic resonance spectroscopy reveals metabolic changes in living cardiomyocytes after low doses of ionizing radiation
Autorzy:
Gramatyka, Michalina
Skorupa, Agnieszka
Sokół, Maria
Powiązania:
https://bibliotekanauki.pl/articles/1038408.pdf
Data publikacji:
2018
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
ionizing radiation
metabolomics
HR MAS NMR
cardiotoxicity
Opis:
Several lines of evidence indicate that exposure of heart to ionizing radiation increases the risk of cardiotoxicity manifested by heart dysfunction and cardiovascular diseases. It was initially believed that the heart is an organ relatively resistant to radiation. Currently, however, it is suspected that even low doses of radiation (< 2 Gy) may have a negative impact on the cardiovascular system. Cardiotoxicity of ionizing radiation is associated with metabolic changes observed in cardiac cells injured by radiation. In this study, we used human cardiomyocytes as a model system, and studied their metabolic response to radiation using high-resolution magic angle spinning nuclear magnetic resonance techniques (HR-MAS NMR). Human cardiomyocytes cultured in vitro were exposed to ionizing radiation and their survival was assessed by clonogenic assay. Changes in apoptosis intensity and cell cycle distribution after the irradiation were measured as well. NMR spectra of cardiomyocytes were acquired using Bruker Avance 400 MHz spectrometer at a spinning rate of 3200 Hz. Survival of cardiomyocytes after NMR experiments was assessed by the Trypan blue exclusion assay. Exposure of cardiomyocytes to small doses of ionizing radiation had no effect on cell proliferation potential and intensity of cell death. However, analysis of metabolic profiles revealed changes in lipids, threonine, glycine, glycerophosphocholine, choline, valine, isoleucine, glutamate, reduced glutathione and taurine metabolism. The results of this study showed that ionizing radiation affects metabolic profiles of cardiomyocytes even at low doses, which potentially have no effect on cell viability.
Źródło:
Acta Biochimica Polonica; 2018, 65, 2; 309-318
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Promieniotwórczość materiałów budowlanych stosowanych w budownictwie (promieniowanie jonizujące)
Radioactivity of building materials used in construction (ionizing radiation)
Autorzy:
Owczarek, M.
Powiązania:
https://bibliotekanauki.pl/articles/111172.pdf
Data publikacji:
2016
Wydawca:
Centrum Rzeczoznawstwa Budowlanego Sp. z o.o.
Tematy:
promieniotwórczość
materiały budowlane
budownictwo
promieniowanie jonizujące
promieniowanie
radiation
building materials
building
ionizing radiation
Opis:
Zaprezentowano rodzaje promieniowania i ich charakterystykę. Opisano jednostki aktywności źródła i dawki przyjętej przez organizmy żywe. Następnie artykuł opisuje normy promieniowania ustalone dla materiałów budowlanych i wymagania ustawowe jakie muszą spełniać budynku w celu ochrony przed naturalnymi źródłami promieniowania pochodzącego z zastosowanych materiałów budowalnych i gazu radonu. W Polsce prowadzony jest stały monitoring wybranych materiałów pod kątem promieniowania. Wyniki tych pomiarów również zaprezentowano w artykule.
Types of radiation and their characteristics was presented. Description of the individual source activity and dose adopted by living organisms was given. The article then cites the exposure standard established for building materials and legal requirements to be met by the building to protect it from natural sources of radiation from the building materials and radon gas. In Poland, it is carried out constant monitoring of selected materials for radiation. The results of these measurements are also presented in the article.
Źródło:
Inżynieria Bezpieczeństwa Obiektów Antropogenicznych; 2016, 4; 16-18
2450-1859
2450-8721
Pojawia się w:
Inżynieria Bezpieczeństwa Obiektów Antropogenicznych
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radiation of mining grounds - case study forecasting the hazard level of ionizing
Prognozowanie poziomu zagrożenia promieniowaniem jonizującym na terenach górniczych - studium przypadku
Autorzy:
Korban, Z.
Powiązania:
https://bibliotekanauki.pl/articles/1206269.pdf
Data publikacji:
2015
Wydawca:
STE GROUP
Tematy:
hazard of ionizing radiation
harmonic analysis
szkodliwości promieniowania jonizującego
analiza harmoniczna
Opis:
When analyzing time series we can often observe that they have periodic oscillations (cyclic, seasonal). One of the methods which can be applied to investigate such a phenomenon and which belongs to the group of periodic components models is the method of harmonic analysis. The method consists in analyzing the oscillations around the medium level a0 and building a model as the sum of so called harmonics. The paper presents the applicability potential of harmonic analysis in the forecasting process of radiation hazard on post-mining grounds (mine waters with raised content of radium Ra226 and Ra-228 drained off to the surface), using for that purpose the measurement results of radium concentration from the area of mine water catchment from the years 2004-2013.
Analizując szeregi czasowe często dostrzegamy w nich wahania okresowe (cykliczne, sezonowe). Jedną z metod pozwalającą na badanie tego typu zjawisk jest należąca do grupy modeli składowej periodycznej analiza harmoniczna. Metoda ta opiera się na badaniu wahań wokół poziomu średniego a0 i na budowie modelu w postaci sumy tzw. harmonik. W artykule przedstawiono możliwości wykorzystania analizy harmonicznej w procesie prognozowania występowania zagrożenia radiacyjnego na terenach pogórniczych (wody kopalniane o podwyższonej zawartości radu Ra-226 i Ra-228 odprowadzane na powierzchnię) wykorzystując w tym celu wyniki pomiarów stężenia radu w jednym z rejonów zlewni wód dołowych z lat 2004-2013.
Źródło:
Management Systems in Production Engineering; 2015, 2 (18); 51-57
2299-0461
Pojawia się w:
Management Systems in Production Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evaluation of circulating microparticles in healthy medical workers occupationally exposed to ionizing radiation: A preliminary study
Autorzy:
Al-Massarani, Ghassan
Najjar, Fadi
Aljapawe, Abdulmunim
Ikhtiar, Adnan
Powiązania:
https://bibliotekanauki.pl/articles/2162036.pdf
Data publikacji:
2018-12-20
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
biomarkers
flow cytometry
occupational exposure
microparticles
ionizing radiation
cellular damage
Opis:
Objectives Ionizing radiation was known to cause disruption of cytoskeleton. However, the disorganization of the cytoskeleton leads to form microparticles (MP) that carry membrane and cytoplasmic constituents from their parent cells they are released from. Therefore, authors investigated the effect of the occupational exposure to low doses of ionizing radiation on MP levels. Material and Methods The current study was conducted on 38 healthy medical workers occupationally exposed to low doses of ionizing radiation and 29 controls matched by gender, age, and smoking habits. The MP levels measured by flow cytometry were classified as positive or negative phosphatidylserine (PS⁺ or PS⁻), and phenotyped according to their cellular origin. Results Total MP (PS–/PS+) levels, regardless of phenotype, were significantly higher in workers occupationally exposed to ionizing radiation than in healthy individuals (p = 0.0004). Negative phosphatidylserine microparticles were predominant in medical exposed workers and, to a lesser extent, in controls (68% and 57%, respectively). With regard to phenotypic characterization of cellular origin, MP derived from platelets (CD41a+), endothelial (CD146+), leucocytes (CD45+) and erythrocytes (CD235a+) MP were significantly enhanced in exposed workers compared with controls (p < 0.0001). However, no significant difference was found in the proportion of the other blood elements in the peripheral circulation between the 2 groups. Serum levels of C-reactive protein were normal for all individuals. In addition, no association was observed between MP levels and the studied confounding factors. Conclusions The results suggest that elevated circulating MP levels represent an indicator of cellular damage caused by medical exposure to low doses of ionizing radiation. By consequence, the quantification of MP seems to be a useful biomarker for assessing the negative effects of occupational exposure to ionizing radiation. Int J Occup Med Environ Health 2018;31(6):783–793
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2018, 31, 6; 783-793
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Occupational exposure to ionizing radiation and lens opacity in interventional cardiologists
Autorzy:
Domienik-Andrzejewska, Joanna
Kałużny, Paweł
Piernik, Gabriela
Jurewicz, Joanna
Powiązania:
https://bibliotekanauki.pl/articles/2161953.pdf
Data publikacji:
2019-10-16
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
occupational exposure
ionizing radiation
cataract
low doses
cumulative eye lens doses
interventional cardiologists
Opis:
Objectives Interventional cardiologists (ICs) are occupationally exposed to low or moderate doses of ionizing radiation from repeated exposures. It is not clear whether these occupational conditions may affect their eye lens. Therefore, the risk of radiation-induced cataract in the cohort of Polish interventional cardiologists is analyzed in this paper. Material and Methods The study group consisted of 69 interventional cardiologists and 78 control individuals occupationally unexposed to ionizing radiation. The eye lens opacities were examined using a slit camera and evaluated with Lens Opacities Grading System III. Cumulative eye lens doses were estimated retrospectively using a questionnaire including data on occupational history. Results The average cumulative dose to the left and right eye lens of the ICs was 224 mSv and 85 mSv, respectively. Nuclear opalescence and nuclear color opacities in the most exposed left eye were found in 38% of the ICS for both types, and in 47% and 42% of the controls, respectively. Cortical opacities were found in 25% of the ICS and 29% of the controls. Posterior subcapsular opacities were rare: about 7% in the ICs group and 6% in the control group. Overall, there was some, but statistically insignificant, increase in the risk for opacity in the ICs group, relative to the control group, after adjusting for the subjects’ age, gender, smoking status and medical exposure (adjusted OR = 1.47, 95% CI: 0.62–3.59 for the pooled “any-eye any-type” opacity). There was also no evidence for an increased opacity risk with an increase in the dose. Conclusions The study found no statistically significant evidence against the hypothesis that the risk of cataract in the group of the ICs occupationally exposed to low doses of ionizing radiation is the same as in the control group. Nevertheless, the adverse effect of ionizing radiation still cannot be excluded due to a relatively small study sample size. Int J Occup Med Environ Health. 2019;32(5):663–75
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2019, 32, 5; 663-675
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Background ionizing radiation and semen parameters of men with reproductive problems
Autorzy:
Wdowiak, A.
Stec, M.
Raczkiewicz, D.
Bień, A.
Iwanowicz-Palus, G.
Panasiuk, L.
Powiązania:
https://bibliotekanauki.pl/articles/2085376.pdf
Data publikacji:
2020
Wydawca:
Instytut Medycyny Wsi
Tematy:
ionizing radiation
men
semen analysis
sperm quality
reproduction
male infertility
Opis:
Introduction and objective. The male reproductive system constitutes a set of tissues which are particularly sensitive to external factors. The aim of the study was to analyze the relationship between background radioactivity and the quality of the semen of the men who have reported to the infertility treatment facility in 2000–2016 in the Lublin region of eastern Poland. Materials and method. The radioactivity of the ground-level air layer obtained from the Institute of Meteorology and Water Management in Włodawa in the Lublin region was analysed. 4,250 spermiograms of patients who reported to the treatment facility for the first time due to infertility were analysed and correlated to background radioactivity in the Lublin region in 2000–2016. Results. A long-term decrease in the percentage of morphologically normal spermatozoa of the patients was observed (r=-0.970; p<0.001 in 2000–2009 and r=-0.925; p=0.003 in 2010–2016). Men’s age correlated negatively with sperm motility (r=-0.164; p=0.009) and morphology (r=-0.186; p=0.009). The percentage of spermatozoa with normal morphology was lowered by beta-isotopes of artificial origin in the air in 2000–2009 (r=-0.655; p=0.040) and by the exposure to gamma radiation of the ground-level atmosphere in 2010–2016 (r=-0.676; p=0.048). The percentage of sperm vitality was lowered by gamma radiation in the atmosphere (r=-0.636; p=0.006), but improved by beta isotopes in precipitation (r=0.686; p=0.002) in the whole of the analyzed period. Conclusions. The percentage of morphologically normal spermatozoa in patients who reported to the infertility treatment depends not only on the age of patient, but also on beta-isotopes of artificial origin and gamma radiation in the atmosphere. Beta isotopes in precipitation affect the improvement of sperm vitality.
Źródło:
Annals of Agricultural and Environmental Medicine; 2020, 27, 1; 43-48
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Covid-19 a niewielkie dawki promieniowania jonizującego
COVID-19 and small doses of ionizing radiation
Autorzy:
Dobrzyński, Ludwik
Powiązania:
https://bibliotekanauki.pl/articles/214656.pdf
Data publikacji:
2020
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
COVID-19
wirus SARS-CoV-2
promieniowanie jonizujące
radioterapia małymi dawkami
SARS-CoV-2 virus
Ionizing radiation
low-dose radiotherapy
Opis:
COVID-19 jest, jak dotąd, chorobą, na którą nie mamy lekarstwa ani szczepionek. Niniejsza praca sugeruje, że w sytuacji beznadziejności, gdy umiera wielu ludzi, warto sięgnąć do metod sprawdzonych kilkadziesiąt lat temu, a mianowicie użycia niskich dawek promieniowania jonizującego. Pierwsze doświadczenia kliniczne są zachęcające i stosunkowo wiele ośrodków medycznych wyraża zainteresowanie taką techniką.
COVID-19 is an illness which cannot be as yet treated by medication and vaccines are not available so far. The paper suggests that under present circumstances of helplessnes when so many people die, one could use the method which was checked already few tens of years ago, namely the use of the low doses of ionizing radiation. The first clinical results are encouraging, and many medical centers express their interest in such a technique.
Źródło:
Postępy Techniki Jądrowej; 2020, 3; 25-27
0551-6846
Pojawia się w:
Postępy Techniki Jądrowej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of ionizing radiation on the properties of a hydrobiodegradable aliphatic - aromatic copolyester
Autorzy:
Kubera, H.
Melski, K.
Assman, K.
Głuszewski, W.
Migdał, W.
Zimek, Z.
Czaja-Jagielska, N.
Powiązania:
https://bibliotekanauki.pl/articles/146880.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
aliphatic-aromatic copolyester
biodegradable polymer
ionizing radiation
Opis:
This paper presents the results of the studies on changes of selected quality parameters of hydrobiodegradable aliphatic-aromatic copolyester (AAC). Radiation treatment was performed at the Institute of Nuclear Chemistry and Technology in Warsaw, using cobalt gamma-ray sources "Issledovatel" (dose rate 0.389 Gy/h) and "GC 5000" (8.5 Gy/h). The material was subjected to the impact of radiation doses of 5, 10, 20 and 40 kGy. Selected parameters of the packaging material, important from the standpoint of a potential application, have been studied: gaseous products of radiolysis, strength parameters in accordance with PN EN ISO 527-3, global migration PN-EN-1186-1:2002, FT-IR analysis using PCA method, contact angle measurement using the drop shape method. The results have demonstrated that there is no significant influence of ionizing radiation on AAC film parameters. Correlation between doses applied and values of measurements has not been found.
Źródło:
Nukleonika; 2012, 57, 4; 621-626
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of ionizing radiation on the properties of starch-PVA films
Autorzy:
Abramowska, A.
Cieśla, K. A.
Buczkowski, M. J.
Nowicki, A.
Głuszewski, W.
Powiązania:
https://bibliotekanauki.pl/articles/147450.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
starch
poly(vinyl alcohol)
films
ionizing radiation
mechanical properties
physicochemical properties
Opis:
The cornstarch: poly(vinyl alcohol) (PVA) films characterized by the alternating ratio of starch:PVA (100:0, 80:20, 60:40, 40:60, 20:80, and 0:100) and containing 30% of glycerol were prepared by solution casting. The films were irradiated with an absorbed dose of 25 kGy with gamma rays in a vacuum and with fast electrons in the air. The films characterized by a high content of starch appeared stiff, while the films characterized by a high content of PVA were highly flexible. The tensile strength and flexibility, as well as swelling and hydrophilicity, increased with the increase in the PVA content in the films. However, the tensile strength and wetting angle values achieved a minimum at an intermediate composition. It was found that irradiation enables to reduce hydrophilicity of the films accompanied by a decrease in their flexibility. No general conclusion concerning the effect of irradiation on tensile strength and swelling behavior can be derived. An increase in the homogeneity of the films and an increase in the compatibility of their components was found by scanning electron microscopy (SEM). Strong interactions of the starch and the PVA components were discovered by diffuse reflectance spectroscopy. Degradation was found to be the prevailing process occurring in the films under the infl uence of irradiation. The possible accompanying crosslinking is discussed in terms of the gel content in the samples. Creation of various oxidation products in the films characterized by the modified composition was observed under the influence of irradiation carried out in the air. Basing on the obtained results it can be supposed that the selected starch-PVA compositions might appear useful as packagings of the products predicted for radiation decontamination.
Źródło:
Nukleonika; 2015, 60, No. 3, part 2; 669-677
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Aparatura dozymetryczna stosowana w ochronie radiologicznej przy pracy z promieniowaniem jonizacyjnym
Dosimetry apparatus used in radiation protection at work with ionizing radiation
Autorzy:
Filipecki, J.
Chamerski, K.
Golis, E.
Hyla, M.
Powiązania:
https://bibliotekanauki.pl/articles/103566.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane
Tematy:
promieniowanie jonizujące
radiologia
dozymetria
ionizing radiation
radiology
dosimetry
Opis:
Promieniowanie jonizacyjne, czyli promieniowanie rentgenowskie i promieniowanie jądrowe, głównie typu gamma, alfa i beta, przechodząc przez materię, powoduje jej jonizację i w sposób destrukcyjny oddziałuje na organizmy żywe. Proces oceny ryzyka wynikający z zawodowego narażenia na promieniowanie jonizujące oparty jest na systemie ochrony radiologicznej. Ochrona radiologiczna to całokształt działań i przedsięwzięć zmierzających do zapobiegania narażeniu ludzi i środowiska na promieniowanie jonizujące. W tym celu wykorzystuje się zespół przyrządów przeznaczonych do wykrywania i pomiarów promieniowania jonizującego. W niniejszej pracy przedstawiamy powstawanie, charakterystykę i własności promieniowania jonizującego, a także istniejące ryzyko na stanowiskach pracy, gdzie występuje to promieniowanie, oraz budowę, zasady działania i wykorzystanie podstawowej aparatury dozymetrycznej stosowanej w ochronie radiologicznej.
Ionizing radiation or X-rays and nuclear radiation, particularly gamma, alpha and beta, passing through matter causes the ionization and a devastating effects on living organisms. The risk assessment process resulting from occupational exposure to ionizing radiation, based on the system of radiological protection. Radiation protection encompasses all activities and measures aimed at the prevention of human and environmental exposure to ionizing radiation. For this purpose, a system of instruments for detection and measurements of ionizing radiation is used. In this paper, we present the formation, characteristics and properties of ionizing radiation. Also describes the potential risks in workplaces where there is radiation and the construction, operation, and utilization of basic dosimetric equipment used in radiological protection.
Źródło:
Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Technika, Informatyka, Inżynieria Bezpieczeństwa; 2013, T. 1; 69-90
2300-5343
Pojawia się w:
Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Technika, Informatyka, Inżynieria Bezpieczeństwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Zabezpieczenie metrologiczne przyrządów do pomiaru promieniowania jonizującego stosowanych w Siłach Zbrojnych RP
Metrology maintenance of measuring for ionizing radiation measurements in the Polish Armed Forces
Autorzy:
Marczyk, D.
Powiązania:
https://bibliotekanauki.pl/articles/153368.pdf
Data publikacji:
2003
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
pomiary promieniowania jonizującego
laboratorium dozymetryczne
ionizing radiation measurements
dosimetric calibration laboratory
Opis:
W artykule scharakteryzowano przyrządy służące do pomiaru promieniowania jonizującego stosowane w Siłach Zbrojnych RP oraz omówiono problematykę kontroli metrologicznej tych przyrządów. W kolejnej części artykułu zaprezentowano Laboratorium Dozymetryczne w Dziale Remontu Sprzętu OPChem. 3. Okręgowych Warsztatów Technicznych w Komorowie.
Measuring instruments for ionizing radiation measurements in the Polish Armed Forces are presented in the article. problems concerning calibration of the instruments are discussed as well. The next part of the article presents dosimetric calibration laboratory as a part of the repair department for Chemical defense equipment in the 3 OWT ( 3 Regional Workshop) in Komorowo.
Źródło:
Pomiary Automatyka Kontrola; 2003, R. 49, nr 10, 10; 43-45
0032-4140
Pojawia się w:
Pomiary Automatyka Kontrola
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The importance of abrogation of G2-phase arrest in combined effect of TRAIL and ionizing radiation
Autorzy:
Řezáčová, Martina
Vávrová, Jiřina
Vokurková, Doris
Tichý, Aleš
Knížek, Jiří
Psutka, Jan
Powiązania:
https://bibliotekanauki.pl/articles/1041339.pdf
Data publikacji:
2005
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
ionizing radiation
TRAIL
DR5 receptor
apoptosis
HL-60 cells
Opis:
Background: In this work we studied the relationship between the enhanced expression of DR5 receptor and the effect of combination of TRAIL and ionizing radiation on cell cycle arrest and apoptosis induction in human leukemia cell line HL-60. Material and methods: DR5, APO2.7 and cell cycle were analyzed by flow cytometry. Proteins Bid and Mcl-1 were analyzed by Western-blotting. For clonogenic survival, colony assay on methylcellulose was used. Results: Ionizing radiation caused significantly enhanced positivity of DR5 receptors 24 h after irradiation with high doses (6 and 8 Gy). An increase of DR5 receptor positivity after a dose of 2 Gy was not statistically significant and application of TRAIL 48 h after irradiation did not increase the apoptosis induction. However, a decrease of radiation-induced G2 phase arrest and an increase of apoptosis were observed when TRAIL was applied 16 h before irradiation with the dose of 2 Gy. Incubation with 6 µg/l TRAIL for 16 h reduced D0 value from 2.9 Gy to 1.5 Gy. The induction of apoptosis by TRAIL was accompanied by Bid cleavage and a decrease of antiapoptotic Mcl-1 16 h after incubation with TRAIL. Conclusion: TRAIL in concentration of 6 µg/l applied 16 h before irradiation by the dose of 1.5 Gy caused the death of 63% of clonogenic tumor cells, similarly as the dose of 2.9 Gy alone, which is in good correlation with the enhanced apoptosis induction.
Źródło:
Acta Biochimica Polonica; 2005, 52, 4; 889-895
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Czy niskie dawki promieniowania jonizującego są szkodliwe?
Can low level ionizing radiation do us harm?
Autorzy:
Janiak, Marek Krzysztof
Powiązania:
https://bibliotekanauki.pl/articles/2086923.pdf
Data publikacji:
2022
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
promieniowanie jonizujące
hipoteza liniowa bezprogowa
hipoteza LNT
hormeza radiacyjna
ionizing radiation
linear no-threshold hypothesis
LNT hypothesis
radiation hormesis
Opis:
Wiele już opublikowanych i nowo pojawiające się wyniki badań wyraźnie wskazują na korzystne, prozdrowotne działanie niskich dawek promieniowania jonizującego (p.j.). Dane te przeczą dominującej opinii, że każda ekspozycja na p.j., nawet w najmniejszej dawce, może wywołać nowotwór i powinna być unikana. Co gorsza, opinia ta, w postaci tzw. hipotezy LNT (linear, no threshold), stanowi podstawę regulacji obowiązujących w ochronie radiologicznej. W niniejszym artykule, po krótkim przedstawieniu genezy modelu LNT, przedstawiono przekonujące wyniki analiz epidemiologicznych i badań doświadczalnych oraz leczenia nowotworów u ludzi, które wyraźnie świadczą o braku podstaw naukowych dla tego modelu. Podano także przy kłady brzemiennych w skutki konsekwencji stosowania hipotezy LNT w praktyce. Konkluzją jest postulat, aby porzucić fałszywą i szkodliwą „ideologię” LNT, która „więzi nas w czasie przeszłym”, utrwala radiofobię i stanowi przeszkodę w powszechnym stosowaniu nieszkodliwych, a często korzystnych dla zdrowia ekspozycji w niskich dawkach p.j.
The linear no-threshold (LNT) hypothesis of cancer risk assessment resulting from exposure to ionizing radiation (IR) constitutes the basis of our radiological protection philosophy and regulations. This hypothesis assumes that each absorbed dose of IR, no matter how small, is potentially carcinogenic and that the effects of low doses (not exceeding 100 mGy and 0.1 mGy/min for acute and chronic exposures, respectively) can be extrapolated from those of high doses of IR. However, evidence accumulated over many years clearly indicates that absorption of low radiation doses does not cause harm and often promotes health. In this review I provide examples of the results of both epidemiological analyses and controlled experimental studies which indicate that there is a qualitative difference between the effects of low vs. high doses of IR and that the LNT tenet lacks scientific justification. I also outline the genesis and reasons for its persistence as well as numerous negative consequences of using the latter and conclude it’s high time to replace the LNT dogma with a scientifically-based relationship such as a hormetic or a threshold dose-response model.
Źródło:
Postępy Techniki Jądrowej; 2022, 2; 11--21
0551-6846
Pojawia się w:
Postępy Techniki Jądrowej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Structural disorder of tooth germs in the antenatal period under low doses ionizing radiation exposure in acute experiment
Autorzy:
Cheshko, N. N.
Berlov, H. A.
Pohodenko-Chudakova, I. O.
Gontchar, F. L.
Powiązania:
https://bibliotekanauki.pl/articles/285679.pdf
Data publikacji:
2010
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
ionizing radiation
dental system
radiation therapy
Źródło:
Engineering of Biomaterials; 2010, 13, no. 99-101; 9-10
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ promieniowania jonizującego na termiczne właściwości segmentowych poliuretanów do celów biomedycznych
The influence of ionizing radiation on the thermal properties of segmented polyurethanes for biomedical purposes
Autorzy:
Walo, M.
Przybytniak, G.
Powiązania:
https://bibliotekanauki.pl/articles/285178.pdf
Data publikacji:
2008
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
poliuretan
promieniowanie jonizujące
właściwości termiczne
polyurethanes
ionizing radiation
thermal properties
Opis:
Badano termiczne właściwości segmentowego poliuretanu po ekspozycji na promieniowanie jonizujące przy użyciu różnicowej kalorymetrii skaningowej (DSC) i analizy termograwimetrycznej (TGA). W celu zbadania termicznej degradacji poliuretanu określono energię aktywacji metodą Kissingera i Flynn-Wall-Ozawa. Na podstawie uzyskanych wyników można wnioskować, że sterylizacja radiacyjna nie ma znaczącego wpływu na termiczne właściwości badanych poliuretanów.
Thermal properties of segmented polyurethane (PU) were investigated upon exposure to ionizing radiation by differencial scanning calorimetry (DSC) and thermogravimetric analysis (TGA). Additionally, the activation energy of PU was determined using Kissinger’s and Flynn-Wall-Ozawa’s methods to study the thermal degradation. On a basis of the obtained results it can be stated that radiation sterilization have not significant influence on thermal properties of investigated polyurethanes.
Źródło:
Engineering of Biomaterials; 2008, 11, no. 77-80; 117-120
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of ionizing radiation to environment protection
Autorzy:
Chmielewski, A.
Powiązania:
https://bibliotekanauki.pl/articles/147932.pdf
Data publikacji:
2005
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
electron accelerator
gamma rays
flue gas
wastewater
sludge
Opis:
Radiation technology may contribute to the environmental protection to a great extent. Electron beam industrial installations for flue gases containing SOx and NOx treatment have been already built in China and Poland. The same technology for high sulphur and high humidity off-gases (low quality lignite) has been successfully tested in an industrial pilot plant in Bulgaria. Pilot plant tests performed in Japan have illustrated that by applying electron beam for municipal waste incinerator off-gases treatment the concentration of dioxins can be reduced by 80%, other persistent organic pollutants can be depredated as well. The positive results of electron beam wastewater treatment are the basis for a full-scale industrial plant being built in the South Korea. A pilot gamma plant for sludge irradiation producing a high grade organic fertilizer is in operation in India. All these achievements are reported in this paper.
Źródło:
Nukleonika; 2005, 50,suppl.3; 17-24
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badania współczynnika tarcia statycznego polietylenu PE-UHMW poddanego promieniowaniu jonizującemu
Investigations of the static friction coefficient of PE-UHMW polyethylene subjected to the ionizing radiations
Autorzy:
Kowalewski, P.
Jasiński, R.
Powiązania:
https://bibliotekanauki.pl/articles/190146.pdf
Data publikacji:
2015
Wydawca:
Stowarzyszenie Inżynierów i Techników Mechaników Polskich
Tematy:
tarcie
współczynnik tarcia statycznego
PE-UHMW
promieniowanie jonizujące
friction
static friction coefficient
ionizing radiation
Opis:
W pracy przedstawiono badania współczynnika tarcia statycznego polietylenu PE-UHMW poddanego różnym dawkom promieniowania jonizującego oraz starzeniu, imitującemu biologiczne oddziaływanie organizmu na materiał. Badania tribologiczne prowadzono w ruchu posuwisto-zwrotnym podczas rozruchu, kojarząc badany materiał z typowymi metalami stosowanymi w chirurgii implantacyjnej: stalą austenityczną ANSI 316L oraz stopem tytanu Ti6Al4V. Analizowano zmiany współczynnika tarcia statycznego μ0 związanego z naciskiem p (w zakresie 0,5÷2,5 MPa) w zależności od dawki napromieniowania polietylenu PE-UHMW (w zakresie 25-250 kGy), dla obu rodzajów metalowych przeciwpróbek. Ustalono, że wraz ze wzrostem nacisku jednostkowego (w badanym zakresie) wartości współczynnika tarcia statycznego, co typowe, maleją. Stwierdzono, że optymalna dawka promieniowania, ze względu na wartość siły tarcia, mieści się pomiędzy 100 a 250 kGy, dla wszystkich badanych nacisków oraz skojarzeń materiałowych. Mechanizm zmniejszenia wartości oporów tarcia w tym przypadku nie został rozpoznany i wymaga prowadzenia dalszych badań, podobnie jak wyznaczenie oporów tarcia kinetycznego.
The paper describes an investigation of a static friction coefficient of PE-UHMW polyethylene subjected to ionizing radiations and aging, which imitated a biological influence of the human body on the tested material. Tribological tests were conducted in a reciprocating motion at the beginning of movement against ANSI 316L austenitic stainless steel and Ti6Al4V titanium alloy, both common materials applied in implantation surgery. Changes in the static friction coefficient were analysed in association with a contact pressure (in the range 0.5–2.5 MPa) depending on the ionizing radiation dose of PE-UHMW (in the range 25–250 kGy), for both kinds of metal counter samples. The studies confirmed that the static friction coefficient decreases with an increase in contact pressure (in the tested range). It has been found that the optimal ionizing radiation dose, due to the friction value, falls between 100 and 250 kGy, for all tested contact pressures and material couples. The mechanism of the reduction in frictional resistance values has not been identified in this case and requires further research, and the kinetic friction resistance needs to be determined.
Źródło:
Tribologia; 2015, 5; 67-78
0208-7774
Pojawia się w:
Tribologia
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
‘Zero energy’ electron beam technology for sludge hygienization
Autorzy:
Chmielewski, Andrzej G.
Sudlitz, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/147406.pdf
Data publikacji:
2019
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
biogas
sewage sludge
ionizing radiation
hygienization
Opis:
Large quantity of sewage sludge originating from wastewater treatment plants is becoming a growing problem from environmental and human health points of view. One of the ways to use sewage sludge is agricultural purpose due to its nutrients and organic matter content, but the condition is that it should be deprived of pathogenic bacteria and parasite egg contamination. Application of ionizing radiation to hygienize sewage sludge can make it appropriate for agricultural use. The process does not require addition of chemicals to sludge; it is environmentally friendly and effective in removal of biological threats. In the past, successful attempts of sewage sludge treatment using ionizing radiation were made. Pilot plants and commercial ones proved that pathogens can be easily removed from sewage sludge by ionizing radiation. The concept of ‘zero energy’ biogas plant is based on the construction of a complex system consisting of biogas plant and electron accelerator in the biofertilizer manufacturing line. Digestate originating from the methane fermentation of sewage sludge is irradiated to remove all pathogens using electron beam from an accelerator powered by electric energy obtained from burning biogas in a cogenerator. The product is a high-quality, biologically safe fertilizer.
Źródło:
Nukleonika; 2019, 64, 2; 55-63
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena narażenia na promieniowanie jonizujące techników obsługujących gammakamery
Evaluation of exposure to ionizing radiation among gamma camera operators
Autorzy:
Domańska, Agnieszka A.
Bieńkiewicz, Małgorzata
Olszewski, Jerzy
Powiązania:
https://bibliotekanauki.pl/articles/2166788.pdf
Data publikacji:
2014-11-04
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
promieniowanie jonizujące
medycyna nuklearna
dozymetria
dawka graniczna
ochrona radiologiczna
personel medyczny
ionizing radiation
nuclear medicine
Dosimetry
dose limit
radiation protection
medical staff
Opis:
Wstęp: Ochrona personelu placówki medycyny nuklearnej przed zagrożeniami wynikającymi ze stosowania promieniowania jonizującego jest istotnym aspektem ochrony radiologicznej osób fizycznych. Celem pracy była oceny narażenia zawodowego techników elektroradiologii wykonujących badania scyntygraficzne w Zakładzie Medycyny Nuklearnej Centralnego Szpitala Klinicznego UniwersytetuMedycznego w Łodzi, gdzie rocznie przeprowadzanych jest kilka tysięcy różnego rodzaju radioizotopowych badań diagnostycznych. Materiał i metody: W badanej placówce diagnostycznej zatrudnionych jest 10 techników (2013 r.), których narażenie podlega stałej kontroli za pomocą dozymetrii indywidualnej. Zebrano archiwalne dane dotyczące kwartalnych odczytów z dozymetrów na przestrzeni lat 2001-2010 i przeanalizowano dawki kwartalne wyrażone, jako równoważniki dawki Hp(10). Wyznaczono również dawki roczne oraz 5-letnie, odnosząc wyniki do obecnie obowiązujących norm prawnych. Dla wybranego okresu jednego roku zebrano również dane dotyczące liczby i rodzaju realizowanych w tym czasie badań, aby ocenić, czy istnieje zależność między łączną aktywnością radiofarmaceutyków podaną w tym czasie pacjentom a dawkami zarejestrowanymi u techników wykonujących te badania. Wyniki: W badanym 10-letnim okresie działalności placówki, najwyższa zarejestrowana u technika dawka roczna wynosiła 2 mSv, a najwyższa sumaryczna dawka 5-letnia - 7,1 mSv, co nie przekraczało 10% wartości granicznych dawki rocznej (20 mSv) i 5-letniej (100 mSv). Zaobserwowano dodatnią zależność liniową między wartościami kwartalnych dawek otrzymanych przez techników a łączną aktywnością radiofarmaceutyków podanych w tym okresie pacjentom. Wnioski: Przy zachowaniu zasad ochrony radiologicznej oraz warunków bezpiecznego stosowania promieniowania jonizującego dawki otrzymywane przez techników wykonujących badania scyntygraficzne są niskie, co potwierdza zaliczenie tej grupy zawodowej do pracowników kategorii B. Med. Pr. 2013;64(4):503–506
Background: Protection of nuclear medicine unit employees from hazards of the ionizing radiation is a crucial issue of radiation protection services. We aimed to assess the severity of the occupational radiation exposure of technicians performing scintigraphic examinations at the Nuclear Medicine Department, Central Teaching Hospital of Medical University in Łódź, where thousands of different diagnostic procedures are performed yearly. Materials and Methods: In 2013 the studied diagnostic unit has employed 10 technicians, whose exposure is permanently monitored by individual dosimetry. We analyzed retrospective data of quarterly doses in terms of Hp(10) dose equivalents over the years 2001-2010. Also annual and five-year doses were determined to relate the results to current regulations. Moreover, for a selected period of one year, we collected data on the total activity of radiopharmaceuticals used for diagnostics, to analyze potential relationship with doses recorded in technicians performing the examinations. Results: In a 10-year period under study, the highest annual dose recorded in a technician was 2 mSv, which represented 10% of the annual dose limit of 20 mSv. The highest total dose for a 5-year period was 7.1 mSv, less than 10% of a 5-year dose limit for occupational exposure. Positive linear correlation was observed between total activity of radiopharmaceuticals used for diagnostics in the period of three months and respective quarterly doses received by technicians performing examinations. Conclusions: Doses received by nuclear medicine technicians performing diagnostic procedures in compliance with principles of radiation protection are low, which is confirmed by recognizing the technicians of this unit as B category employees. Med Pr 2013;64(4):503–506
Źródło:
Medycyna Pracy; 2013, 64, 4; 503-506
0465-5893
2353-1339
Pojawia się w:
Medycyna Pracy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ionizing radiation affects protein composition of exosomes secreted in vitro from head and neck squamous cell carcinoma
Autorzy:
Jelonek, Karol
Wojakowska, Anna
Marczak, Lukasz
Muer, Annika
Tinhofer-Keilholz, Ingeborg
Lysek-Gladysinska, Malgorzata
Widlak, Piotr
Pietrowska, Monika
Powiązania:
https://bibliotekanauki.pl/articles/1039103.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
exosomes
head and neck cancer
ionizing radiation
proteome
radiobiology
Opis:
Exosomes are membrane vesicles of endocytic origin that participate in inter-cellular communication. Environmental and physiological conditions affect composition of secreted exosomes, their abundance and potential influence on recipient cells. Here, we analyzed protein component of exosomes released in vitro from cells exposed to ionizing radiation (2Gy dose) and compared their content with composition of exosomes released from control not irradiated cells. Exosomes secreted from FaDu cells originating from human squamous head and neck cell carcinoma were analyzed using LC-MS/MS approach. We have found that exposure to ionizing radiation resulted in gross changes in exosomal cargo. There were 217 proteins identified in exosomes from control cells and 384 proteins identified in exosomes from irradiated cells, including 148 "common" proteins, 236 proteins detected specifically after irradiation and 69 proteins not detected after irradiation. Among proteins specifically overrepresented in exosomes from irradiated cells were those involved in transcription, translation, protein turnover, cell division and cell signaling. This indicated that exosomal cargo reflected radiation-induced changes in cellular processes like transient suppression of transcription and translation or stress-induced signaling.
Źródło:
Acta Biochimica Polonica; 2015, 62, 2; 265-272
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radiation safety of Bulgaria in the contemporary international situation
Autorzy:
Dolchinkov, Nikolay Todorov
Powiązania:
https://bibliotekanauki.pl/articles/576459.pdf
Data publikacji:
2016-12-30
Wydawca:
Akademia Sztuki Wojennej
Tematy:
radiation safety
background
nuclear
monitoring
ionizing radiation
Opis:
It is known that everything on our planet is subjected to constant exposure from the natural and anthropogenic, earth and space SIR, and is situated in conditions created by natural and technical radioactive Backlight. The ionizing radiations accompany planet life in its diff erent manifestations of all phases of the evolution. The National Automated System for continuous monitoring of the radiation background has 26 local monitoring stations (LMS) covering the whole country, with greater density around NPP ‘Kozloduy’. Radiometric measurements in real conditions, sampling, and analysis are carried out by the Executive Environment Agency (EEA) at the MoEW and radiological control laboratories. A special place in radiation safety is taken by timely detection of radioactive waste and materials that appear in one way or another in the environment.
Źródło:
Security and Defence Quarterly; 2016, 13, 4; 3-14
2300-8741
2544-994X
Pojawia się w:
Security and Defence Quarterly
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Application of ionizing radiation in studies of biomarkers of individual susceptibility
Autorzy:
Cebulska-Wasilewska, A.
Powiązania:
https://bibliotekanauki.pl/articles/147794.pdf
Data publikacji:
2005
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
biomarkers
susceptibility
application of radiation
DNA repair
Opis:
Human biomonitoring, as a tool to identify health risk from environmental exposures, has gained increasing interest especially in the areas of cancer risk assessment and diseases treatment. Chromosome aberrations resulting from direct DNA breakage or from inhibition of DNA repair or synthesis, measured in peripheral blood lymphocytes, have been used successfully in the assessment of health risk associated to environmental genotoxic exposures. A faster but sensitive and reliable method for detection of DNA damage, or DNA repair capacity, might be crucial to many fields from molecular epidemiology and toxicology to preventive and clinical medicine. There are reports that results of DNA measures with the use of single cell gel electrophoresis (SCGE) correlate, on the one hand, with physical measures of genotoxins, and on the other hand, with cytogenetic damage that is a biomarker associated to the alteration of the health risk. This review is based on studies in which exposure to radiation was applied as a challenging treatment and DNA damage induced and repaired was analyzed with the use of the alkaline version of SCGE assay. Results from studies on susceptibilities and repair competence carried out in various groups of exposed workers, controls, and cancer patients (more than 700 donors) show variability between donors both in a response to challenging treatment and in the efficiency of repair process. Influences of the occupational exposures and factors depending on genotypes or life style on cellular capacities are observed. Discussed results suggest that study in vitro with the challenging cells by radiation exposure and measuring, with the SCGE assay, the DNA damage before and after repair, may develop a good biomarker of the individual susceptibility to various genotoxins and exposures (environmental, occupational, therapeutic). Such a biomarker may have a potential use in a molecular epidemiology and preclinical identification.
Źródło:
Nukleonika; 2005, 50,suppl.2; 3-8
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The awareness of caregivers about their children’s exposure to ionizing radiation accompanying medical procedures: the assessment study
Autorzy:
Jończyk-Potoczna, Katarzyna
Pucher, Beata
Strzelczuk-Judka, Lidia
Buraczyńska-Andrzejewska, Beata
Więckowska, Barbara
Krauss, Hanna
Biliński, Przemysław
Wojtyła-Buciora, Paulina
Powiązania:
https://bibliotekanauki.pl/articles/2161993.pdf
Data publikacji:
2019-02-27
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
children
CT examination
parents
radiation protection
ionizing radiation
radiation dose
Opis:
Objectives The aim of the study was a survey-based assessment concerning parents of children undergoing CT examinations and their knowledge of detailed information about procedures involved in imaging diagnostics. Material and Methods A statistical analysis of 108 surveys of parents of children undergoing CT studies in the Department of Pediatric Radiology in Poznań, Poland was done, with the use of Statistica software. Results In result of the evaluation of all subsections of the substantive question number, the majority of answers were incorrect (68–98%). No correlation between the number of CT examinations conducted for a child and the number of correct answers to substantive questions was observed. No correlation between the number of CT examinations conducted for a child and the fact of noting the examination with the use of ionizing radiation down in a child’s health certificate was stated. The statistical analysis showed that children of parents who declared that the aim of the CT examination had been explained to them better underwent more of them. Conclusions Parents are poorly informed about a radiation dose and risk related to a CT examination procedure. Int J Occup Med Environ Health. 2019;32(1):65–73
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2019, 32, 1; 65-73
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Low Doses of Ionizing Radiation on Young and Two Week old Invasive Larvae of Entomopathogenic Nematodes (Heterorhabditidae, Steinernematidae)
Wpływ niskich dawek promieniowania jonizującego na młode oraz dwutygodniowe larwy nicieni entomopatogennych (Heterorhabditidae, Steinernematidae)
Autorzy:
Poleszczuk, O.
Tumialis, D.
Pezowicz, E.
Powiązania:
https://bibliotekanauki.pl/articles/389389.pdf
Data publikacji:
2011
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
nicienie entomopatogeniczne
Steinernema feltiae
promieniowanie jonizujące
ionizing radiation
entomopathogenic nematodes
Opis:
The performed experiments were aimed at checking the effect of ionising radiation as an abiotic factor on the bionomics of young and two week old larvae of Steinernema feltiae and Heterorhabditis megidis. Features associated with nematode pathogenicity (intensity of infection) and morphometry (length and width of individuals of the giant generation) were analysed. Three doses of ionising radiation (0.1, 0.05, and 0.01 kGy) were applied. The obtained results indicate the modifying effect of ionising radiation on each of the studied features of entomopathogenic nematodes.
Przeprowadzone doświadczenie miało na celu sprawdzenie wpływu promieniowania jonizującego, jako czynnika abiotycznego, na bionomię młodych oraz dwutygodniowych larw inwazyjno-przetrwalnikowych Steinernema feltiae oraz Heterorhabditis megidis. Badano cechy związane z patogenicznooecią nicieni (intensywność zarażenia) oraz morfometrią (długość oraz szerokość osobników pokolenia olbrzymiego). Zastosowano trzy dawki promieniowania jonizujacego: 0,1; 0,05; 0,01 kGy. Otrzymane wyniki wskazują na modyfikujący charakter promieniowania jonizującego u każdej z badanych cech nicieni entomopatogenicznych.
Źródło:
Ecological Chemistry and Engineering. A; 2011, 18, 3; 407-411
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Worldwide developments in the field of radiation processing of materials in the down of 21st century
Autorzy:
Chmielewski, A.
Powiązania:
https://bibliotekanauki.pl/articles/146175.pdf
Data publikacji:
2006
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
ionizing radiation
polymers
nanomaterials
Opis:
Developments regarding the radiation processing of materials are discussed in the paper. Radiation sources are briefly listed, showing recent achievements in the field. The main group of materials modified by radiation are synthetic polymers and rubber. Other applications are irradiation of semiconductors and gemstone colorization. New, growing fields of application are processing of natural polymers and nanomaterials.
Źródło:
Nukleonika; 2006, 51,suppl.1; 3-9
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radiation effects on vitamin A and ßeta-carotene contents in liver products
Autorzy:
Taipina, M.
del Mastro, N.
Powiązania:
https://bibliotekanauki.pl/articles/148574.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
vitamin A
ßeta-carotene
ionizing radiation
Opis:
he movement toward commercialization of the process and the recent actions of various governmental agencies to accept irradiated foods as wholesome, even when high doses are applied has stimulated increased interest in this treatment. Concern for the fate of vitamins when foods are irradiated is almost entirely centered on maintenance of their biological function as essential nutrients. The aim of this work was to assess the effects of ionizing radiation on vitamin A and ßeta-carotene contents in commercialized food products of animal origin, specifically fresh bovine liver and pork pâté de foie. As present Brazilian legislation has no restriction of dose limits to be applied on foods, the 60Co gamma irradiation doses for these experiments were 3 kGy and 30 kGy. The results show a full retention of vitamin content when the applied dose was 3 kGy and a loss of about 60% when the dose was 30 kGy. When applying high doses, it would be necessary to consider this content reduction and proceed to a vitamin supplement when necessary.
Źródło:
Nukleonika; 2003, 48, 1; 9-11
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of ionizing radiation on the sensory characteristics of canned meat products
Wpływ promieniowania jonizującego na sensoryczną charakterystykę konserw mięsnych
Autorzy:
Rusz, J.
Powiązania:
https://bibliotekanauki.pl/articles/10183.pdf
Data publikacji:
1976
Wydawca:
Instytut Rozrodu Zwierząt i Badań Żywności Polskiej Akademii Nauk w Olsztynie
Opis:
Przeprowadzono badania wpływu napromieniania konserw szynkowych o masie ca 450g dawkami rzędu 1 i 2 Mrad/godz. na ich jakość sensoryczną. Szynki były zamrożone do temp. -30 °C i w stanie zamrożonym poddawane napromienianiu odpowiednią dawką, a następnie pasteryzowane przez 50 min w temp. 80°C. Jako próbki porównawcze służyły konserwy z tego samego surowca poddane wyłącznie pasteryzacji w ww. warunkach oraz konserwy sterylizowane (121 °C/30 min). W ocenie sensorycznej wykonanej przez uprzednio przeszkolony zespół 20-25 osobowy analizowano smakowitość, zapach i konsystencję próbek (bezpośrednio po ich przygotowaniu oraz po 3 miesiącach składowania w temperaturze pokojowej), stosując skalę oceny hedonicznej (9-punktową dla smakowitości, 4-punktową dla zapachu i konsystencji). Stwierdzono znaczne obniżenie jakości (szczególnie smakowitości) próbek poddanych działaniu promieniowania w stosunku do próbek kontrolnych. Po składowaniu różnice jakości pomiędzy próbkami napromienionymi i kontrolnymi uległy pewnemu zmniejszeniu. Równolegle badano zmiany w ilości związków karbonylowych oraz amin pod wpływem napromieniania. Uzyskane wyniki pozwalają przypuszczać, że związki karbonylowe i tioaldehydy są odpowiedzialne przede wszystkim za pogorszenie sensorycznej charakterystyki konserw pod wpływem napromieniania.
Źródło:
Acta Alimentaria Polonica; 1976, 02, 3
0137-1495
Pojawia się w:
Acta Alimentaria Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Expression of cellular isoform of prion protein on the surface of peripheral blood lymphocytes among women exposed to low doses of ionizing radiation
Autorzy:
Klucinski, P
Mazur, B.
Hrycek, A.
Masluch, E.
Cieslik, P.
Kaufman, J.
Martirosian, G.
Powiązania:
https://bibliotekanauki.pl/articles/50336.pdf
Data publikacji:
2007
Wydawca:
Instytut Medycyny Wsi
Tematy:
blood lymphocyte
ionizing radiation
low dose
lymphocyte
cellular isoform
woman
radiation exposure
expression
prion protein
Opis:
Ionizing radiation affects the expression of adhesive and co-stimulatory molecules in lymphocytes. The physiological function of cellular isoform of prion protein (PrPc) is little known. Evidences indicate a link between lymphocytes activation and PrPc expression on their surface; however, no direct effect of radiation on PrPc level in these cells was investigated. The objective of this study was to determinate the effect of low doses of ionizing radiation on the expression of PrPc on the surface peripheral blood lymphocytes in the women operating X-ray equipment. In 36 female workers and 30 persons of the control group the PrPc expression on CD3 (T lymphocytes), CD4 (T helper), CD8 (T cytotoxic) and CD19 (B lymphocytes), as well as the percentage of lymphocytes with PrPc on their surface, were tested. Subgroups with respect to age and length of employment were selected. A signifi cant increase was observed in PrPc expression on CD3 and CD4 with lowered PrPc level on CD8 and percentage of CD8 cells with PrPc in workers compared to control. The PrPc level did not show signifi cant changes in subgroups in relation to age (below and over 40 years old) both in the investigated and control groups, whereas a lower percentage of PrPc expressing CD19 cells showed in employed women below 40 years of age. A signifi cant decrease was found in PrPc expression on the surface of CD3, CD4 and CD8 cells in the subgroup employed for over 10 years than in the subgroup with less than 10 years of employment.
Źródło:
Annals of Agricultural and Environmental Medicine; 2007, 14, 2
1232-1966
Pojawia się w:
Annals of Agricultural and Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Taking into account the phase instability of generators caused by the influence of ionizing radiation of space on the parameters of carrier frequency synchronization systems
Rozliczanie fazy niestabilności generatorów spowodowane wpływem kosmicznego promieniowania jonizującego na parametry systemówsynchronizacji częstotliwości nośnych
Autorzy:
Turovsky, Oleksandr
Panadiy, Sergei
Powiązania:
https://bibliotekanauki.pl/articles/1841365.pdf
Data publikacji:
2020
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
adjustable phase instability of the generator
ionizing radiation
regulowana niestabilność faz generatora
promieniowanie jonizujące przestrzeni
Opis:
The article investigates the possibilities of closed and combined synchronization systems for operation in the conditions of phase instability of generators caused by the influence of ionizing radiation of outer space. The inconsistency of the closed-type synchronization system with respect to minimizing the variance of phase errors and increasing the dynamics during carrier frequency tracking is shown. For the combined synchronization system, the article clarifies the process of open communication synthesis and proposes analytical dependences that allow the technique of open communication synthesis to be specified taking into account the phase instability of generators caused by the ionizing radiation of space.
W artykule zbadano możliwości pracy zamkniętych i kombinowanych układów synchronizacji w warunkach niestabilności fazowej generatorów spowodowanej wpływem promieniowania jonizującego przestrzeni kosmicznej. Pokazana jest niespójność systemu synchronizacji typu zamkniętego w odniesieniu do minimalizacji wariancji błędów fazowych i zwiększania dynamiki podczas śledzenia częstotliwości nośnej. Dla połączonego systemu synchronizacji w artykule wyjaśniono proces syntezy otwartej komunikacji i zaproponowano analityczne zależności pozwalające określić technikę syntezy otwartej komunikacji z uwzględnieniem niestabilności fazowej generatorów wywołanej promieniowaniem jonizującym przestrzeni.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2020, 10, 4; 38-42
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of electron radiation on sugar content in inverted liquid sugar
Autorzy:
Podadera, P.
Sabato, S. F.
Powiązania:
https://bibliotekanauki.pl/articles/148037.pdf
Data publikacji:
2009
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
electron beam
ionizing radiation
inverted liquid sugar
physicochemical properties
Opis:
Inverted liquid sugar is a mixture of sucrose, glucose and fructose, which shows its relevant characteristic on high sweetness power. Ionizing radiation has been applied to different kind of food and ingredients for different reasons, such as pathogens reduction, disinfestations, quarantine purposes, ripening delay among others. Radiation from an electron beam can be utilized as a technique to treat this ingredient because it can process a great volume of material per unit of time. The main goal of this paper was to verify the effect of radiation on the properties of inverted liquid sugar. This ingredient was irradiated in an electron accelerator (Radiation Dynamics) at a dose ranging from 5 to 50 kGy. Sucrose content measurements were reduced by 23% at 30 kGy when compared to control and the reduced sugar content increased around 11%. Density and moisture values were not affected by radiation. The total soluble solids (Brix degrees) rose in function of the absorbed dose.
Źródło:
Nukleonika; 2009, 54, 2; 85-87
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Decomposition of diclofenac in sewage from municipal wastewater treatment plant using ionizing radiation
Autorzy:
Bojanowska-Czajka, Anna
Powiązania:
https://bibliotekanauki.pl/articles/2055688.pdf
Data publikacji:
2021
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
diclofenac
degradation efficiency
electron beam
gamma rays
sewage sludge
Opis:
The decomposition of diclofenac (DCF) in sewage sludge from municipal wastewater treatment plant was investigated. It was found that adsorption of DCF on sludge is about 40%. Compared to previous studies, where the degradation yield in aqueous solution was 100%, in those experiments at the dose up to 5 kGy, only 50% of initial DCF concentration of 50 mg L−1 was decomposed in sediment and in solution over the sediment. The experiments were carried out using both gamma radiation and electron beam. It has been observed that DCF in the aqueous phase, above the sediment, was decomposed with the same efficiency using both gamma radiation and electron beam. Whereas for DCF in the sediment, a higher degradation efficiency was found when gamma radiation was applied. This is most likely due to the limited penetration depth of the electron beam into the sludge layer. It was shown that the applied peroxide addition (in a stoichiometric amount needed for complete mineralization of 50 mg L−1 DCF) did not cause increase in yield of DCF decomposition.
Źródło:
Nukleonika; 2021, 66, 4; 201--206
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The joint effect of ionizing radiation and heavy metal ions on the reproduction of Lymnaea stagnalis
Autorzy:
Pinkina, T.W.
Pinkin, A.A.
Chernushova, T.M.
Powiązania:
https://bibliotekanauki.pl/articles/84190.pdf
Data publikacji:
2013
Wydawca:
Uniwersytet Mikołaja Kopernika. Wydział Biologii i Ochrony Środowiska. Stowarzyszenie Malakologów Polskich
Źródło:
Folia Malacologica; 2013, 21, 3
1506-7629
Pojawia się w:
Folia Malacologica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The effect of ionizing radiation on vernalization, growth and development of winter wheat
Autorzy:
Czyczylo-Mysza, I.M.
Marcinska, I.
Jankowicz-Cieslak, J.
Dubert, F.
Powiązania:
https://bibliotekanauki.pl/articles/19063.pdf
Data publikacji:
2013
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Opis:
The effects of gamma irradiation on the vernalization requirements, growth and development of winter wheat grown in a rainout shelter were studied during two successive growing seasons. Dry grains of winter wheat cv. Kobra were irradiated with 300 Gy radiation from a cobalt 60 gamma irradiator. Treated and control grains were pregerminated and subjected to vernalization for 0, 42 or 54 days. Morphological parameters of the plants developing from irradiated seeds (M1 generation) and the plants grown from the seeds produced by the irradiated plants (M2 generation) were measured in order to track the studied effects over two generations. Irradiation of dry grains slowed the growth and development of the plants regardless of the temperature treatment. The measured yield structure elements appeared to be lower for irradiated plants, but no clear effect of radiation on vernalization requirements was noted.
Źródło:
Acta Biologica Cracoviensia. Series Botanica; 2013, 55, 1
0001-5296
Pojawia się w:
Acta Biologica Cracoviensia. Series Botanica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Dynamics of radon and its decay products inside an accumulative chamber
Autorzy:
Yakovleva, V. S.
Powiązania:
https://bibliotekanauki.pl/articles/148846.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
radon
thoron
accumulative chamber
ionizing radiation yield
ion production rate
Opis:
The calculations of radon and its decay products accumulation dynamics inside a chamber designed for measurements of radon flux density from the soil surface were carried out in the present work. Dynamics of alpha-,beta-particles and gamma-ray yields under decay of accumulated radionuclide nuclei was calculated based on the accumulated activity. Ion production rate inside the accumulative chamber due to ionizing radiation of different types was estimated. Thoron and its decay products accumulation regularities inside the accumulative chamber were also estimated and potential effect of thoron on measurement results (if counting regime is used) was analyzed in detail. Dynamic equations of the studied radiation characteristics, their solutions and obtained results analysis are presented.
Źródło:
Nukleonika; 2010, 55, 4; 595-600
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Estimate of radon exposure in geothermal SPAs in Poland
Autorzy:
Walczak, Katarzyna
Olszewski, Jerzy
Zmyślony, Marek
Powiązania:
https://bibliotekanauki.pl/articles/2177082.pdf
Data publikacji:
2015-09-21
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
Polska
occupational exposure
worker
radon
ionizing radiation
spa visitor
Opis:
Objectives Geothermal waters may contain soluble, radioactive radon gas. Spa facilities that use geothermal water may be a source of an increased radiation dose to people who stay there. It has been necessary to assess the exposure to radon among people: workers and visitors of spa centers that use geothermal waters. Material and Methods In 2013, workers of the Nofer Institute of Occupational Medicine measured concentrations of radon over the geothermal water surfaces in 9 selected Polish spa centers which use geothermal water for recreational and medicinal purposes. The measurements were performed by active dosimetry using Lucas scintillation cells. Results According to our research, the doses received by the personnel in Polish geothermal spas are < 0.6 mSv/year. In 1 of the investigated spas, the estimated annual dose to the staff may exceed 3 mSv/year. Conclusions In Polish geothermal spas, neither the workers nor the visitors are at risk of receiving doses that exceed the safe limits.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2016, 29, 1; 161-166
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Taking into account the phase instability of generators caused by the influence of ionizing radiation of space on the parameters of carrier frequency synchronization systems
Rozliczanie fazy niestabilności generatorów spowodowane wpływem kosmicznego promieniowania jonizującego na parametry systemówsynchronizacji częstotliwości nośnych
Autorzy:
Turovsky, Oleksandr
Panadiy, Sergei
Powiązania:
https://bibliotekanauki.pl/articles/1841349.pdf
Data publikacji:
2020
Wydawca:
Politechnika Lubelska. Wydawnictwo Politechniki Lubelskiej
Tematy:
adjustable phase instability of the generator
ionizing radiation
regulowana niestabilność faz generatora
promieniowanie jonizujące przestrzeni
Opis:
The article investigates the possibilities of closed and combined synchronization systems for operation in the conditions of phase instability of generators caused by the influence of ionizing radiation of outer space. The inconsistency of the closed-type synchronization system with respect to minimizing the variance of phase errors and increasing the dynamics during carrier frequency tracking is shown. For the combined synchronization system, the article clarifies the process of open communication synthesis and proposes analytical dependences that allow the technique of open communication synthesis to be specified taking into account the phase instability of generators caused by the ionizing radiation of space.
W artykule zbadano możliwości pracy zamkniętych i kombinowanych układów synchronizacji w warunkach niestabilności fazowej generatorów spowodowanej wpływem promieniowania jonizującego przestrzeni kosmicznej. Pokazana jest niespójność systemu synchronizacji typu zamkniętego w odniesieniu do minimalizacji wariancji błędów fazowych i zwiększania dynamiki podczas śledzenia częstotliwości nośnej. Dla połączonego systemu synchronizacji w artykule wyjaśniono proces syntezy otwartej komunikacji i zaproponowano analityczne zależności pozwalające określić technikę syntezy otwartej komunikacji z uwzględnieniem niestabilności fazowej generatorów wywołanej promieniowaniem jonizującym przestrzeni.
Źródło:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska; 2020, 10, 4; 38-42
2083-0157
2391-6761
Pojawia się w:
Informatyka, Automatyka, Pomiary w Gospodarce i Ochronie Środowiska
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The assessment of the ionizing radiation dose received by patients during some diagnostic X-ray examinations carried out on the basis of the working procedures in the health care entities
Autorzy:
Bekas, M.
Waniewska, E.
Wardzinski, A.
Wieprzowski, K.
Powiązania:
https://bibliotekanauki.pl/articles/874288.pdf
Data publikacji:
2017
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
assessment
ionizing radiation
radiation dose
patient
diagnostic method
X-ray method
radiation exposure
working procedure
health care
human health
health risk
Opis:
Background. X-ray examination is a popular and universally used injury and disease diagnostic method. A distinctive X ray examination feature is that it can be done quickly which is extremely important in case of the need for rapid diagnosis of patients in life threatening condition. Another advantage of the X-ray examinations is also relatively low cost of carry. However, X-ray examination involve adverse health effects. During the examination the patient is subjected to ionizing radiation that might have impact on his health. Objective. The aim of this study has been to determine and assess the size of the entrance surface doses (ESD) received by patients during selected X-ray examinations performed on the basis of the medical working procedures available in healthcare entities in Masovian Voivodeship in Poland. Materials and Method. The examinations were conducted for 71 X-ray units located in the Masovian Voivodeship. Measurements of doses received by the patients were based on our own validated test methods. Results. It was found that the range applied to the high voltage in healthcare entities does not always coincide with the values specified in the standard procedures. It was found in the skull projection radiography AP and LAT that the recorded values were from range 60 to 82 kV (the average value of 74 kV) while in accordance with a standard procedure they should be in the range from 65 to 75 kV. Only in case of cervical spine radiography in the AP projection, the LAT exposure conditions were matching with the standard obligatory procedures in Poland. The consequence of selecting exposure conditions are significant differences in the size of the doses the patient receive during the same medical procedures. The greatest range of ESD doses was found during radiography of the thoracic spine in the projection AP and LAT. The projection LAT measured values were in the range of 523 to 10550 μGy (average value 2175 μGy). Conclusions. It is necessary to update immediately the standard procedures and to develop detailed guidelines for the preparation of working procedures in X-ray rooms.
Wprowadzenie. Badania rentgenowskie są powszechnie stosowaną metodą diagnozowania urazów i schorzeń występujących u pacjentów. Największą zaletą tych badań jest szybkość ich wykonania, co jest niezwykle istotne w przypadku konieczności postawienia szybkiej diagnozy medycznej u pacjentów w ciężkim stanie zagrażającym ich życiu. Badania rentgenowskie niosą jednakże ze sobą także negatywne skutki zdrowotne. W trakcie ich przeprowadzania pacjent poddany jest działaniu promieniowania jonizującego, które nie jest obojętne dla zdrowia. Cel. Celem badań było oszacowanie wielkości wejściowej dawki powierzchniowej (ESD) jaką otrzymują pacjenci podczas wybranych badań rentgenowskich przeprowadzonych w oparciu o procedury robocze obowiązujące w placówkach ochrony zdrowia na terenie województwa mazowieckiego. Materiał i metody. Zbadano 71 aparatów rentgenowskich wykorzystywanych w placówkach ochrony zdrowia na terenie województwa mazowieckiego. Pomiary dawek otrzymywanych przez pacjentów podczas badań rentgenowskich przeprowadzono własnymi zwalidowanymi metodami badawczymi. Wyniki. Stwierdzono, iż zakres wartości wysokiego napięcia dobieranego przez personel medyczny na aparatach rentgenowskich w placówkach ochrony zdrowia nie zawsze pokrywa się z wartościami określonymi w procedurach wzorcowych. Stwierdzono, iż w radiografii czaszki w projekcji AP i LAT wartość wysokiego napięcia była od 60 do 82 kV (wartość średnia 74 kV), zaś zgodnie z procedurą wzorcową powinny mieścić się w zakresie od 65 do 75 kV. Najlepszą zgodność pomiędzy wartościami wysokiego napięcia stosowanymi w pracowniach rtg a tymi określonymi w procedurach wzorcowych obowiązujących w Polsce stwierdzono w przypadku radiografii kręgosłupa szyjnego. Konsekwencją tak dobieranych warunków ekspozycji są znaczące różnice w wielkości dawek promieniowania otrzymywanych przez pacjentów dla tych samych procedur medycznych. Największą rozpiętość dawek ESD stwierdzono w trakcie radiografii kręgosłupa piersiowego w projekcji AP oraz LAT. W projekcji LAT zmierzone wartości były w przedziale od 523 do 10550 μGy (wartość średnia 2175 μGy). Wnioski. Niezbędne jest jak najszybsze uaktualnienie procedur wzorcowych oraz opracowanie szczegółowych wytycznych dotyczących przygotowywania procedur roboczych w pracowniach rentgenowskich.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2017, 68, 1
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of radiopharmaceuticals on articular cartilage’s mechanical properties
Autorzy:
Kuzu, Nihal
Cicek, Ekrem
Powiązania:
https://bibliotekanauki.pl/articles/147587.pdf
Data publikacji:
2019
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
articular cartilage
compressive modulus
technetium-99m
technetium-99m sestamibi
ionizing radiation
Opis:
As radiation science and technology advances, nuclear medicine applications are increasing worldwide which necessitate the understanding of biological implications of such practices. Ionizing radiation has been shown to cause degraded matrix and reduced proteoglycan synthesis in cartilage, and the late consequences of which may include degenerative arthritis or arthropathy. Although degenerative effects of the ionizing radiation on cartilage tissue have been demonstrated, the effects on the mechanical properties of articular cartilage are largely unknown. The radiopharmaceuticals, technetium-99m and technetium-99m sestamibi, were utilized on bovine articular cartilage to investigate these effects. We used two different mechanical tests to determine the mechanical properties of articular cartilage. Dynamic and static mechanical tests were applied to calculate compressive modulus for articular cartilage. We observed clearly higher control modulus values than that of experimental groups which account for lesser stiffness in the exposed cartilage. In conclusion, compressive moduli of bovine articular cartilage were found to decrease after radiopharmaceutical exposure, after both instantaneous and equilibrium mechanical experiments.
Źródło:
Nukleonika; 2019, 64, 2; 71-74
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electron beam decomposition of pollutant model compounds in aqueous systems
Autorzy:
Ting, T. -M.
Dahlan, K. Z. M.
Powiązania:
https://bibliotekanauki.pl/articles/147660.pdf
Data publikacji:
2011
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
absorbed dose
concentration of solute
ionizing radiation
organic decomposition
Opis:
In this study, factors that limit the utilization of electron beam irradiation for decomposition of pollutants were investigated. Potassium hydrogen phthalate (KHP) was used as the model pollutant compound. The accumulated chemical oxygen demand (COD) removal below 2.4 kGy (applied for concentration at 85, 170, 255, 425 and 850 mg/l) was less than 10 per cent, whereas the accumulated COD removal at 215 kGy (applied for concentration at 85, 170, 255, 425 and 850 mg/l) was 198 per cent. At a lower concentration of KHP, 85 mg/l, the accumulated COD removal (for dose ranging from 0.5 to 215 kGy) was 236per cent. As the concentration of KHP increases to 850 mg/l, almost no COD removal was recorded (for dose ranging from 0.5 to 215 kGy). The results show that the removal efficiency and effectiveness of pollutants were influenced by the solute concentration and irradiation dose. When the concentration of KHP increases to a certain level, water radical species were not sufficient to form KHP radicals and, therefore, reduce the decomposition of KHP molecules. Removal of phthalate as measured by COD was restricted at a very high concentration, 850 mg/l. This indicates that the by-products have scavenged the radicals rapidly. This also suggests that, the limitation of radiolytic products of water to decompose KHP at higher concentration. A large quantity of KHP molecules would also stabilize the KHP radicals and resulting in lower removal of KHP. Similar removal trend was also observed for the actual industrial wastewater.
Źródło:
Nukleonika; 2011, 56, 4; 349-355
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pro-angiogenic effects of X-rays on murine endothelial cells
Autorzy:
Lisiak, E.
Dziekiewicz, M.
Meineke, V.
Bilski, M.
Janiak, M.
Powiązania:
https://bibliotekanauki.pl/articles/147804.pdf
Data publikacji:
2005
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
angiogenesis
ionizing radiation
cell adhesion
integrins
Opis:
Recently, significant attention has been paid to the possibility of thwarting cancer progression by inhibition of neoangiogenesis (formation of new blood vessels) in growing tumors. Although general mechanisms of angiogenesis have been elucidated, virtually nothing is known about the effects of low doses of ionizing radiation on pro-angiogenic properties of endothelial cells. In the present study, we evaluated the effects of a low (0.2 Gy), intermediate (1 Gy), and high (4 Gy) doses of X-rays on a few angiogenesis-related parameters of isolated murine endothelial cells. We show here that 24 to 48 hours after irradiation with 0.2 Gy the cell proliferation was inhibited to a similar extent as after the exposure to 1 Gy. Also, adhesion of the 0.2 Gy-irradiated cells to both gelatin and MatrigelŽ was inhibited 24 hours post-exposure, whereas irradiation with 1 or 4 Gy resulted in the increased adhesion of the cells to these substrata. Similar effects were observed during the "wound" migration assay. Finally, 24 hours after exposure of the cells to 0.2 Gy of X-rays, the surface expression of the â3 integrin subunit was down-regulated, whereas irradiations with 1 and 4 Gy of X-rays resulted in the significantly elevated expression of this subunit. These results indicate that proliferating endothelial cells are sensitive in vitro to relatively low doses of ionizing radiation
Źródło:
Nukleonika; 2005, 50,suppl.2; 17-20
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of Panasonic`s dosimetric system with Gamma-31 dosimeters
Autorzy:
Urban, P.
Skubacz, K.
Chmielewska, I.
Powiązania:
https://bibliotekanauki.pl/articles/91993.pdf
Data publikacji:
2013
Wydawca:
Główny Instytut Górnictwa
Tematy:
ionizing radiation
thermoluminescence dosimetry
dose
promieniowanie jonizujące
dozymetria termoluminescencyjna
dawka
Opis:
Equipment being used in medical or industrial institutions is often a source of ionizing radiation with different energies and types, which complicates the detection and assessment of doses. Up until now, for dosimetric measurements of ionizing radiation, Gamma-31 dosimeters have been used in the Central Mining Institute for many years. Now, this system will be expanded by a Panasonic system, for which measurement procedures were developed and comparisons with other dosimeters were held. The method is based on a four-element dosimeters UD-802 Panasonic equipped with CaSO and LiBO detectors additionally sheltered by filters of different surface mass. The use of UD-802 dosimeters, in contrast to Gamma-31 dosimeters, permits measuring radiation doses in a different range of photon energy. Consequently, it is possible to obtain a more accurate analysis of the hazards caused by gamma radiation in underground mines. The publication includes a description of the dosimetry system and presents the results of measurements conducted by means of both types of dosimeters. In order to verify the correctness of the indications of the new dosimetry system a series of measurements were carried out, which allowed examining the behaviour of the dosimeters under different environmental conditions. As a place of exposure, the selected laboratories in the Silesian Centre for Environmental Radiometry were chosen, where the work is connected with (TE)NORM and equipment producing ionizing radiation or containing sources of this type of radiation. Moreover, to observe the dosimeters behaviour in difficult environmental conditions, they were exposed in water treatment plants and an underground potassium salt mine.
Źródło:
Journal of Sustainable Mining; 2013, 12, 4; 24-33
2300-1364
2300-3960
Pojawia się w:
Journal of Sustainable Mining
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Analysis of Ionizing Radiation Generated by Partial Discharges
Autorzy:
Zmarzły, D.
Nagi, Ł.
Borucki, S.
Boczar, T.
Powiązania:
https://bibliotekanauki.pl/articles/1199157.pdf
Data publikacji:
2014-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
43.40.-r
43.40.Vn
43.58.Wc
Opis:
This paper presents the preliminary results of the performed experiment, based on common phenomenon of partial discharges. A simple Geiger-Muller counter (DP-66M) was used for measurement of a dose of ionizing radiation, which is accompanied by partial discharges. Values from which the radiation intensity was dependent could be controlled individually: the distance between measurer and source, as well as the voltage generating partial discharges. The obtained results indicate that in the examined phenomenon, significant dose of X-ray radiation is present. According to the Kramers-Kulenkampff theory, it depends also on the atomic number of elements involved. Using MATLAB software, the obtained data were compiled to develop suitable theory for further research study. There was also implemented fuzzification for the fuzzy logic, and the effect was the capability of forecasting radiation doses according to the fixed variables for a given material, where partial discharges were generated.
Źródło:
Acta Physica Polonica A; 2014, 125, 6; 1377-1379
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Efficiency calculation and comparison of fluidic and solid-body power sources using corpuscular radiation
Autorzy:
Miś, Tomasz A.
Powiązania:
https://bibliotekanauki.pl/articles/147670.pdf
Data publikacji:
2020
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
alphavoltaic
nuclear battery
radioactivity
ionizing reactor
plutonium-239
americium-241
Opis:
Research done on a set of simple fl uidic (with the fluid used as the ionized medium being air under atmospheric pressure) alphavoltaic cells – small ionizing reactors or “nuclear batteries”, designed in the Faculty of Power and Aerospace Engineering of Warsaw University of Technology, Poland – has shown the possibility of accumulation of usable amount of electric charge. Two simple methods are proposed to describe the fluidic alphavoltaic cells in terms of their efficiency. The results of these methods are presented and compared with the efficiencies of other contemporary types of solid-body (semiconductor junction-based) alpha- and betavoltaic cells. The comparison showed that despite the far-reaching simplicity in design, the designed fl uidic cells are still more efficient than some of the solid-body devices that use the alpha type of decay.
Źródło:
Nukleonika; 2020, 65, 1; 31-35
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on biological activity of chitosan after radiation processing
Autorzy:
Gryczka, U.
Gawrońska, A.
Migdał, W
Gawroński, S. W.
Chmielewski, A. G.
Powiązania:
https://bibliotekanauki.pl/articles/148626.pdf
Data publikacji:
2008
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
chitosan
biostimulators
ionizing radiation
willow
biomass
Opis:
In recent years there is a trend in industry to limit the usage of chemical compounds. Natural polymers are new promising materials that possess important properties like biodegrability or lack of toxicity. Radiation processing of natural occurring polymers is an area of current research for development of new applications. The aim of this study was to determine the impact of ionizing radiation modification on bioactivity of a natural polysaccharide. Chitosan with different molecular weights was investigated as a biostimulator – a biologically active substance that stimulates some growth processes in plants. Chitosan in solid state was irradiated with electron beam from an electron beam accelerator Elektronika 10-10 with a dose range from 50 to 300 kGy. The effects of irradiation on the molecular weight of chitosan were investigated by viscosity and GPC measurements. Non-irradiated and irradiated chitosan at concentrations 0.001, 0.01, 0.1 and 1 g/dm3 were used for greenhouse tests of its activity for growth promotion of Salix viminalis L. var. gigantea plant. Uniform rooted cuttings (20 per combination) were selected for the test and cultivated in aerated hydroponics culture containing Hoagland’s nutrient solutions plus respective amounts of chitosan. After six weeks of plant exposure to chitosan, data of selected parameters of plant growth were collected. In most cases, except the highest concentration, both forms of chitosan had stimulatory effect on leaf area, length of roots and of newly developed shoots. Also fresh and dry weights of these organs were greater in chitosan treated plants. The highest concentration of chitosan was stimulatory only for a number of roots and newly developed shoots while for other parameters was inhibitory. In comparable concentrations the stimulatory effect was greater for chitosan irradiated in comparison with the non-irradiated one.
Źródło:
Nukleonika; 2008, 53, suppl. 2; 73-76
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Design and Development of Detector Simulator for Total Ionized Dose and ground checkout system of radiation monitoring instrument
Autorzy:
Mahant, K.
Bhatt, C.
Powiązania:
https://bibliotekanauki.pl/articles/226871.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
radiation
Total Ionizing Dose
LabVIEW
Opis:
This Paper describes the simulator development for the Total Ionizing Dose (TID) measurement of radiation monitoring instrument. The TID Detector (UDOS001-micro dosimeter) is a compact hybrid microcircuit which directly measures Total Ionizing Dose absorbed by an internal silicon test mass. The developed detector simulator, simulates the equivalent Total Ionized Dose absorbed from the space radiation and Ground checkout simulator receive the data from Radiation monitoring Instrument through UART and process it for the functional verification of the Radiation monitoring Instrument, which is discussed in the paper.
Źródło:
International Journal of Electronics and Telecommunications; 2017, 63, 4; 431-436
2300-1933
Pojawia się w:
International Journal of Electronics and Telecommunications
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Possible role of radon in prebiotic chemistry and in early evolution of Life on Earth
Autorzy:
Zagórski, Z. P.
Powiązania:
https://bibliotekanauki.pl/articles/148902.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
great oxidation event
ionizing radiation
prebiotic chemistry
radon
thoron
uranium
Opis:
Radon in the environment of early Earth was present in sites, determined by location of deposits of uranium, in very different geological formations. According to the decay of uranium-238, the total production of radon at the beginnings was twice as high as now and was continuously diminishing to the present levels. This nuclide could not play as big a role as do radioactive elements connected with the presence of high concentration of 235U, which was high enough in some places to give rise to formation of natural nuclear fission reactors (e.g. Oklo phenomenon in Africa). The main role of ionizing radiation in prebiotic chemistry and biological evolution was played by low LET (linear energy transfer) radiations, as deep penetrating sources of external energy. High LET radiations are of low penetration and could act only superficially. Radon is an exception, due to its easy transfer in the air. Therefore, it could play a role already in the cases of these early organisms which exhibited the gaseous exchange of chemical compounds with the surrounding atmosphere. The action was destructive, but, on the other hand, was also mutagenic. Nevertheless, the general quantitative effect of radon on the global scale could not be larger than of other radioactive nuclides. Presented considerations are part of the chapter by the present author on the role of nuclear and radiation chemistry in astrobiology, in the monograph published by American Scientific Publishers [1].
Źródło:
Nukleonika; 2010, 55, 4; 555-558
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ radioaktywnego radonu i jego pochodnych na zdrowie człowieka
The impact of radioactive radon and its decay products on human health
Autorzy:
Bilska, Izabela
Powiązania:
https://bibliotekanauki.pl/articles/1035600.pdf
Data publikacji:
2016
Wydawca:
Instytut Medycyny Wsi
Tematy:
"health risks"
"ionizing radiation"
"radon"
Opis:
Ionizing radiation derived from radon isotopes and their derivatives is responsible for approx. 40% of the annual dose that every human being takes from all sources of radiation. These are alpha-emitting isotopes, which is important in terms of human health harms. In the article, the sources of radioactive radon entering the air in residential rooms are presented. It also shows the mechanism of forming its derivatives and their impact on human health. Moreover, it provides a list of diseases which these substances can trigger or stimulate and enumerates their medical, beneficial uses. In order to differentiate between positive and negative effects of radon on human body, the article brings together recommendations of international organizations and Polish legal norms.
Promieniowanie jonizujące pochodzące od izotopów radonu i ich pochodnych jest odpowiedzialne za ok. 40% dawki rocznej, jaką przyjmuje człowiek ze wszystkich źródeł promieniowania. Są to izotopy alfa-promieniotwórcze, co ma istotne znaczenie w aspekcie szkodliwości dla zdrowia człowieka. W artykule oprócz źródeł przedostawania się radioaktywnego radonu do powietrza w pomieszczeniach, przedstawiono mechanizm powstawania jego pochodnych i sposób oddziaływania tych substancji na zdrowie ludzi. Wymieniono schorzenia, do powstawania i rozwoju których przyczyniają się omawiane substancje oraz przedstawiono przykłady leczniczego ich zastosowania. Aby rozgraniczyć pozytywny i negatywny wpływ radonu na organizm człowieka podano zalecenia organizacji międzynarodowych i normatywy prawne obowiązujące w Polsce i na świecie.
Źródło:
Medycyna Środowiskowa - Environmental Medicine; 2016, 19, 1; 51-56
1505-7054
2084-6312
Pojawia się w:
Medycyna Środowiskowa - Environmental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effects of Radiation Doses on the Photostimulated Luminescence Response of Certain Herbs and Spices
Autorzy:
Sandeva, I.
Spasevska, H.
Ginovska, M.
Stojanovska-Georgievska, L.
Powiązania:
https://bibliotekanauki.pl/articles/221337.pdf
Data publikacji:
2017
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
food
ionizing radiation
photostimulated luminescence
Opis:
Ionizing radiation applied on food eliminates harmful microorganisms, prevents sprouting and delays ripening. All methods for detection of irradiated food are based on physical, chemical, biological or microbiological changes caused by the treatment with ionizing radiation. When minerals are exposed to ionizing radiation, they accumulate radiation energy and store it in the crystal lattice, by which some electrons remain trapped in the lattice. When these minerals are exposed to optical stimulation, trapped electrons are released. The phenomenon, called optically stimulated luminescence or photostimulated luminescence, occurs when released electrons recombine with holes from luminescence centers in the lattice, resulting in emission of light with certain wavelengths. In this paper, the results of measurements performed on seven different samples of herbs and spices are presented. In order to make a comparison between luminescence signals from samples treated with different doses, unirradiated samples are treated with Co-60 with doses of 1 kGy, 5 kGy and 10 kGy. In all cases it was shown that the higher the applied dose, the higher the luminescence signal.
Źródło:
Metrology and Measurement Systems; 2017, 24, 1; 143-151
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Test mikrojądrowy w retrospektywnej dozymetrii biologicznej
Micronucleus assay in rapid retrospective biological dosimetry
Autorzy:
Rawojć, K.
Miszczyk, J.
Powiązania:
https://bibliotekanauki.pl/articles/134746.pdf
Data publikacji:
2016
Wydawca:
ADVSEO
Tematy:
micronuclei
micronucleus assay
retrospective biological dosimetry
ionizing radiation
cell death
Opis:
Rapid retrospective biological dosimetry allows absorbed dose evaluation post exposure to ionizing radiation. One of the main tools of biodosimetry is based on the analysis of the effects resulting from the impact of ionizing radiation on the cell. Various cytogenetic tests give possibility of the accurate dose estimation. To investigate cell response to radiation one performs the analysis of biomarkers approved by International Atomic Energy Agency e.g. the analysis of dicentric chromosomes or micronuclei frequency. Micronucleus test is relatively a faster and therefore more effective method to study changes in the genetic material, induced by various genotoxic agents. This study confirms that micronulei frequency and nuclear division index analysis allows for appropriate absorbed dose estimation when it comes to ionizing radiation. In order to further optimize and facilitate the micronucleus assay and other cytogenetic tests in rapid retrospective biological dosimetry, the research are still ongoing.
Źródło:
Technical Issues; 2016, 4; 78-82
2392-3954
Pojawia się w:
Technical Issues
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Growth and Yield Response of Field Pea (Pisum Sativum L.) to Gamma Irradiation Stress
Autorzy:
Majeed, Abdul
Muhammad, Zahir
Ullah, Rehman
Powiązania:
https://bibliotekanauki.pl/articles/2199667.pdf
Data publikacji:
2016-12-20
Wydawca:
Instytut Hodowli i Aklimatyzacji Roślin
Tematy:
Biotechnology
Genetic variation
Ionizing radiation
Legumes
Mutation
Opis:
Ionizing radiation has extensive applications in agriculture for inducing mutagenic changes in major field crops, potential breeding purposes, varietal development and crop improvement. This study was conducted to test the efficacy of 0.8, 1.6, 2.4 and 3.6 kGy gamma irradiation doses (Cobalt-60) upon growth and yield performance of edible pea (Pisum sativum L.) in pot culture experiment during 2009. Results demonstrated that higher radiation doses (1.6 and 3.2 kGy) significantly influenced the studied attributes of P. sativum. It was observed that 3.2 kGy had detrimental effects on shoot and pod lengths of pea which were reduced by 14.60 and 17.71 % respectively when compared to control. Differential response of the number of seeds pod-1, 1000 grain weight and dry biomass of pea were recorded at the applied doses. Significant reduction in number of seeds (-14.21 %) but increase in 1000 grain weight (+13.93 %) and dry biomass (+11.32 %) of pea were recorded at 1.6 kGy which revealed stimulatory effects on grain weight and dry biomass. Conversely, radiation dose 3.2 kGy was found detrimental to all the studied parameters except number of pods plant-1 and number of seeds pod-1 which were not affected.
Źródło:
Plant Breeding and Seed Science; 2016, 74; 27-35
1429-3862
2083-599X
Pojawia się w:
Plant Breeding and Seed Science
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Degradation and detoxifi cation of 2-chlorophenol aqueous solutions using ionizing gamma radiation
Autorzy:
Basfar, A. A.
Muneer, M.
Alsager, O. A.
Powiązania:
https://bibliotekanauki.pl/articles/148378.pdf
Data publikacji:
2017
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
2-chlorophenol
degradation
detoxification
gamma irradiation
aqueous solution
Opis:
Chlorophenols are compounds with high toxicity, poor biodegradability, and carcinogenic and recalcitrant properties. This work studies, for the first time, the destruction and detoxification of 2-chlorophenol (2-CP) in water using 60Co gamma radiation under different conditions including varied radiation doses, addition of hydrogen peroxide (H2O2), and varied pH values. High-performance liquid chromatography (HPLC) and ion chromatography (IC) confirmed a successful degradation of 2-CP to primarily yield phenol molecules and chloride anions. A radiation dose as low as 25 kGy achieved approximately 90% removal of 50–150 ppm of 2-CP in neutral water. However, the addition of a strong oxidizer such as H2O2 to 2-CP solutions reduced the required dose to achieve 90% removal to at least 1.3-fold. The reduction in radiation doses was also observed in acidic and alkaline media, reducing the required doses of 90% removal to at least 0.4-fold. It was imperative to study the toxicity levels of the oxidation by-products to provide directions for the potential applicability of this technology in water treatment. Toxicology Microtox® bioassay indicated a significant reduction in the toxicity of the degradation by-products and the detoxification was further enhanced by the addition of H2O2 and changing the pH to more acidic or alkaline conditions. These findings will contribute to the knowledge of the removal and detoxification of such challenging environmental contaminant and could be potentially applied to other biologically resistant compounds.
Źródło:
Nukleonika; 2017, 62, 1; 61-68
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ promieniowania jonizującego na segmentowe poliuretany do zastosowań biomedycznych
Radiation-induced effects in segmented polyurethane for biomedical purposes
Autorzy:
Walo, M.
Przybytniak, G.
Powiązania:
https://bibliotekanauki.pl/articles/284412.pdf
Data publikacji:
2009
Wydawca:
Akademia Górniczo-Hutnicza im. Stanisława Staszica w Krakowie. Polskie Towarzystwo Biominerałów
Tematy:
promieniowanie jonizujące
poliuretany
biomedycyna
ionizing radiation
polyurethanes
biomedicine
Opis:
Celem prezentowanej pracy było badanie wpływu promieniowania jonizującego na wybrane fizyko-chemiczne właściwości segmentowego poliuretanu (PU). Poliuretan scharakteryzowano przy użyciu elektronowego rezonansu paramagnetycznego (EPR), pomiaru kąta zwilżania i badania właściwości termicznych i mechanicznych. Wyniki otrzymane przy zastosowaniu powyższych metod wskazują na niewielki wpływ procesów radiacyjnych na strukturę i właściwości badanego polimeru do dawki 112kGy. Zatem również ekspozycja poliuretanu na dawkę sterylizacyjną 25kGy nie zmienia właściwości chemicznych i mechanicznych.
The purpose of the presented study was to investigate the effect of ionizing radiation on selected physicochemical properties of segmented polyurethane (PU). Polyurethane was characterized by electron paramagnetic resonance (EPR), measurement of dynamic contact angle and investigation of thermal and mechanical properties. The results obtained by these techniques revealed insignificant influence of radiation on structure and features of investigated polymer up to 112kGy. Thus it was confirmed that upon exposition to a sterilization dose of about 25kGy polyurethane does not change chemical and mechanical properties.
Źródło:
Engineering of Biomaterials; 2009, 12, no. 89-91; 87-90
1429-7248
Pojawia się w:
Engineering of Biomaterials
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigating the filling state of OSL detector traps with the optical sampling method
Autorzy:
Mandowska, Ewa
Smyka, Robert
Mandowski, Arkadiusz
Powiązania:
https://bibliotekanauki.pl/articles/2106412.pdf
Data publikacji:
2022
Wydawca:
Polska Akademia Nauk. Czytelnia Czasopism PAN
Tematy:
optically stimulated luminescence
OSL
ionizing radiation detectors
radiative recombination
signal loss
Opis:
Optically stimulated luminescence (OSL) and thermoluminescence (TL) methods are commonly used in dosimetry of ionizing radiation and dating of archaeological and geological objects. A typical disadvantage of OSL detectors is signal loss over a longer time scale. In this article, we present a method of studying this phenomenon as well as monitoring the state of the detector by means of optical sampling. The method was used to determine the OSL signal loss (fading) characteristics of selected potassium feldspars.
Źródło:
Metrology and Measurement Systems; 2022, 29, 2; 361--371
0860-8229
Pojawia się w:
Metrology and Measurement Systems
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
NGS-Concrete - New Generation Shielding Concrete against Ionizing Radiation - the Potential Evaluation and Preliminary Investigation
Autorzy:
Piotrowski, T.
Tefelski, D.
Sokołowska, J.
Jaworska, B.
Powiązania:
https://bibliotekanauki.pl/articles/1402546.pdf
Data publikacji:
2015-08
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
28.20.Fc
28.41.Qb
Opis:
Concrete is a common material used as a shielding against ionizing radiation due to the relatively low cost and the ability to meet the structural function. State of the art in concrete shielding is that while in case of gamma radiation an increase in density by a change of aggregate is usually efficient enough, protection against neutrons is more complex. It is due to the differences in interactions of neutrons with the matter, depending on their kinetic energy and reaction cross-sections with the component atoms of the cement paste and the aggregate. Last progress in concrete evolution due to use of polymer additives (e.g. superplasticizers) together with reactive additions (e.g. silica fume) allows for a new look at the concrete design for radiation shielding purposes. One of the main advantages of concrete is its composite-type and there is a potential for the optimization of its constituents as well as mixture proportions. The paper presents the preliminary results of the project NGS-Concrete - new-generation shielding concrete against ionizing radiation. The aim of the project is to design the composition of concrete against ionizing radiation, achieved by the use of experiment based multi-criteria optimization of materials supported by the Monte Carlo simulations. The purpose of presented studies was to evaluate neutron shielding properties of ordinary and heavy-weight magnetite concrete modified with epoxy resin and gadolinium oxide. At first the shielding efficiency against neutrons from LWR neutron flux source and Pu-Be was simulated in MCNP code. At the end the comparison of MCNP simulated results and real experiment was presented. It was proved that both methods of modification can improve neutron shielding properties concrete but gadolinium oxide is an efficient additive only for low energy neutron attenuation.
Źródło:
Acta Physica Polonica A; 2015, 128, 2B; B-9-B-13
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Global quantification of heterochromatin-associated histone methylations in cell lines with differential sensitivity to ionizing radiation
Autorzy:
Cetinkaya, Merve
Özgür, Emre
Dalay, Nejat
Gezer, Ugur
Powiązania:
https://bibliotekanauki.pl/articles/1039084.pdf
Data publikacji:
2015
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
histone methylation
heterochromatin
radiosensitivity
ELISA immunoassay
Opis:
Histone modifications are involved in the DNA damage response (DDR). Here, by utilizing an ELISA immunoassay we assessed the methylation at H3K9 (H3K9me2 and H3K9me3) in two cell lines with differential sensitivity to radiation-induced apoptosis, HeLa (sensitive) and MCF-7 (resistant). We found that DNA damage induction by γ-irradiation leads to considerable accumulation (up to 5-fold) of H3K9me2 and H3K9me3, but not of H4K20me3 (control modification) in MCF-7 cells (p<0.05). Interestingly, a lower dose (2 Gy) was more effective than 5 Gy. In HeLa cells a smaller effect (approx. 1.5-1.8-fold) was evident only at 5 Gy. In conclusion, our findings reveal that DNA damage leads to specific accumulation of H3K9me2 and H3K9me3 in a cell-type specific manner.
Źródło:
Acta Biochimica Polonica; 2015, 62, 2; 173-176
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radiation levels of dumpsites within Imo State University, Owerri, Imo State, Nigeria
Autorzy:
Wirnkor, Verla Andrew
Ebere, Enyoh Christian
Chukwunonso, Okonkwo Felix
Ngozi, Verla Evelyn
Powiązania:
https://bibliotekanauki.pl/articles/1114110.pdf
Data publikacji:
2017
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Environmental monitoring
Ionizing
Public health
waste
Opis:
With increasing population and human activities, dumpsites experience diverse sources of waste with potential radiation hazards. Ionizing radiations have often been overlooked amongst researchers in third world countries, hence, information in this regard is lacking. In this study, nine dumpsites within Imo State University (IMSU) grounds were assessed for radiation levels using Geiger Muller counter Tube Mullard type ZP 1481 with assisted scalar and stopwatch. After calibration, the instrument was placed one meter above ground level and count rates recorded at 10 minutes interval for each location once in the morning, the afternoon and the evening for seven days. Results reveal higher dose equivalents in some morning periods than in the afternoon and evening. Site ETF2 had highest value of 0.69±0.08 mSv·yr-1, while Extension gate had lowest value of 0.56±0.01 mSv·yr-1. Compared to National Council for Radiation Protection maximum permissible level, these values are quite low. In conclusion, ionizing radiations levels at the studied dumpsites in Imo State University grounds are low and may not pose a threat to persons within the university.
Źródło:
World News of Natural Sciences; 2017, 11; 45-64
2543-5426
Pojawia się w:
World News of Natural Sciences
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Search of radiation hormesis in plants : irradiation of the cress (Lepidium sativum L.)
Autorzy:
Fornalski, K. W.
Adamowski, Ł.
Turowski, T. W.
Wojnarowicz, J.
Powiązania:
https://bibliotekanauki.pl/articles/146848.pdf
Data publikacji:
2012
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
cress
hormesis
ionizing radiation
Lepidium sativum L.
low dose
Opis:
The paper is composed of two parts : a review of a group of experiments among irradiated plants and own search for radiation hormesis in a single experiment. In the first part the Bayesian analysis of the hormetic-like data published so far shows that the NOAEL (no observed adverse effect level) point, above which adverse effects appear, may be located between 30 and 100 Gy. In the second part the influence of low doses of ionizing radiation was tested on the particularly fast growing plant, namely the cress (Lepidium sativum L.). Two experimental scenarios were used : in the first one the cress was irradiated during the growth (maximal dose 2.3 Gy), while in the second scenario dry seeds were irradiated (maximal dose 100 Gy). The experiment indicates that the NOAEL point lies above 100 Gy and statistically insignificant hormetic effect can be seen between 0.1 and 14 Gy. No linear reaction is observed in the full range of doses.
Źródło:
Nukleonika; 2012, 57, 3; 421-426
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Działanie promieniowania jonizującego na komponentę histonową w DNP
The action of ionizing radiation on the histone component of DNP
Autorzy:
Rzendowska, F.
Powiązania:
https://bibliotekanauki.pl/articles/875964.pdf
Data publikacji:
1972
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
promieniowanie jonizujace
komponenty
komponenta histonowa
skutecznosc dzialania
grasica bydleca
badania naukowe
Źródło:
Roczniki Państwowego Zakładu Higieny; 1972, 23, 6
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Changes in Luminescence of Ce:yag Crystals Under Ionizing Radiation Treatment
Autorzy:
Kaczmarek, S. M.
Moroz, Z.
Kwasny, M.
Kisielewski, J.
Lukasiewicz, T.
Wojtkowska, J.
Rzewuski, H.
Powiązania:
https://bibliotekanauki.pl/articles/2008301.pdf
Data publikacji:
1999-06
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
61.72.Ji
61.80.Ed
Opis:
Radiation induced changes in the luminescence spectrum under influence of UV light, γ-rays, electrons and protons for several concentrations of Ce$\text{}^{3+}$ ions as well as Mg$\text{}^{2+}$ ions in yttrium-aluminum garnet crystals were investigated. To irradiate with γ and electron as grown crystals were used while for proton irradiations the crystals were thermally annealed. For small concentrations of cerium ions (≈0.01 at.%) an increase in the luminescence (about 100%) was observed after gamma irradiation with a dose of 10$\text{}^{5}$ Gy. This increase was due to the growth in Ce$\text{}^{3+}$ ions concentration after γ-irradiation (≈50%), due to the Ce$\text{}^{4+}$ → Ce$\text{}^{3+}$ recharging reaction. For highly doped Ce:YAG crystals (0.1 at%, 0.2 at.%) also an increase, but much smaller (4%), for the Mg codoped crystals (0.1 at.%) was observed. After 1 MeV electron irradiation in the over-threshold type interaction a decrease in luminescence is observed due to the domination of the Ce$\text{}^{3+}$ → Ce$\text{}^{4+}$ ionization process. In the case of the proton irradiation, for small fluencies (≈10$\text{}^{13}$ particles/cm$\text{}^{2}$) an increase in luminescence is observed due to the domination of the recharging processes of Ce$\text{}^{4+}$ ions. For larger fluencies (>10$\text{}^{14}$ particles/cm$\text{}^{2}$) a decrease takes place due to a high level of radiation defects.
Źródło:
Acta Physica Polonica A; 1999, 95, 6; 953-964
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Evolutionary Multiobjective Optimization for Intensity Modulated Radiation Therapy
Autorzy:
Kaliszewski, Ignacy
Miroforidis, Janusz
Powiązania:
https://bibliotekanauki.pl/articles/578596.pdf
Data publikacji:
2015
Wydawca:
Uniwersytet Ekonomiczny w Katowicach
Tematy:
Choroby
Leczenie
Optymalizacja wielokryterialna
Promieniowanie jonizujące
Wielokryterialne podejmowanie decyzji
Illness
Ionizing radiation
Medical treatment
Multiple criteria optimization
Multiple-criteria decision making
Opis:
As cancer diseases take nowadays a heavy toll on societies worldwide, extensive research is being conducted to provide more accurate diagnoses and more effective treatments. In particular, Multiobjective Optimization has turned out to be an appropriate and efficient framework for timely and accurate radiotherapy planning. In the paper, we sketch briefly the background of Multiobjective Optimization research to Intensity Modulated Radiation Therapy, and next we present a rudimentary formulation of the problem. We also present a generic methodology we developed for Multiple Criteria Decision Making, and we present preliminary results with it when applied to radiation treatment planning.
Źródło:
Multiple Criteria Decision Making; 2015, 10; 82-92
2084-1531
Pojawia się w:
Multiple Criteria Decision Making
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The rapid interphase chromosome assay (RICA) implementation : comparison with other PCC methods
Autorzy:
Sommer, S.
Buraczewska, I.
Sikorska, K.
Bartłomiejczyk, T.
Szumiel, I.
Kruszewski, M.
Powiązania:
https://bibliotekanauki.pl/articles/147263.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
biodosimetry
ionizing radiation
premature chromosome condensation (PCC)
human lymphocytes
Opis:
A report is presented on the advantages of the rapid interphase chromosome assay (RICA) and the difficulties that may be met while implementing this method for application in biological dosimetry. The RICA test can be applied on unstimulated human lymphocytes; this is an advantage in comparison with the dicentric chromosomes or micronucleus tests. In the former two tests, stimulated lymphocytes are examined and hence, 48 h more are needed to obtain cells traversing the cell cycle. Due to the use of unstimulated nondividing cells, higher numbers of cells are available for RICA analysis than for dicentric chromosomes or micronuclei tests. Moreover, the method can be applied after exposure to ionizing radiation doses in excess of 5 Gy. Such doses cause a signifi cant cell cycle delay or result in the loss of G2 phase and mitotic cells because of apoptosis. Therefore, the traditional biodosimetry based on the evaluation of the incidence of damage to chromosomes is very difficult to carry out. This is due to the lack of an adequate number of mitotic cells for analysis. RICA is free of this disadvantage. An automatic microscope can be used to retrieve cell images; automatic image analysis can also be used.
Źródło:
Nukleonika; 2015, 60, No. 4, part 2; 933-941
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Montmorillonite modified by unsaturated compatibilizing agents and by ionizing radiation as a potential filler in polymeric composites
Autorzy:
Nowicki, A.
Przybytniak, G.
Starosta, W.
Sartowska, B.
Powiązania:
https://bibliotekanauki.pl/articles/148548.pdf
Data publikacji:
2010
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
composites
montmorillonite
unsaturated ammonium salts
radiation treatment
Opis:
For last several years we have studied modifications of montmorillonite (MMT) with different agents and the structural changes resulting from the processes. The aim of present work was focused on the preparation of polymer composites from epoxy resin and dispersed phase modified chemically and subsequently activated by irradiation. The paper presents investigations concerning intercalation of MMT by the synthesized unsaturated organophilic agents (on the basis of quaternary ammonium salts). The process was studied by: wide-angle X-ray scattering (WAXS), Fourier- -transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA); additionally mechanical properties of the polymer composite as well as its microscopic structure were tested. It was found that unsaturated quaternary ammonium salts can intercalate between MMT layers. The possibility of radiation-induced compatibilization between modified MMT particles and polymeric matrix was also studied. It was confirmed by electron paramagnetic resonance (EPR) spectroscopy that in the synthesized salts stable radicals are formed during irradiation, however their influence on mechanical properties of the final composite is insignificant.
Źródło:
Nukleonika; 2010, 55, 3; 351-357
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Exposure to ionizing radiation by service personnel working with cyclotrons used to produce radiopharmaceuticals in PET diagnostics
Autorzy:
Biegała, Michał
Jakubowska, Teresa
Wrzesień, Małgorzata
Albiniak, Łukasz
Powiązania:
https://bibliotekanauki.pl/articles/2152980.pdf
Data publikacji:
2022
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
nuclear medicine
PET
equivalent dose
service
radiological protection
cyclotron
Opis:
Objectives While working with cyclotrons used for the production of radiopharmaceuticals, workers can experience significant exposure to the adverse effects of ionizing radiation. The aim of this paper was to determine the typical level of such exposure received by such personnel while servicing cyclotrons. Material and Methods Exposure was assessed using TLD detectors placed in an anthropomorphic phantom, as well as dose meter to determine whole body and eye lens exposure. The phantom was placed in locations receiving the greatest exposure to ionizing radiation during service activities. The time spent by employees during servicing was assessed based on routine visits by service technicians. The obtained results were compared with readings of detectors worn by employees during service activities. Results The highest equivalent doses in the thoracic area were found to be received by the lungs (211.16 μSv/year). In the head and neck area, the highest dose was measured in the eye lens (3410 μSv/year). The effective dose for the whole body was found to be 1154.4 μSv/year, based on the phantom, and 149 μSv per service visit (1192 μSv/year), based on the dose meters carried by the workers. Conclusions Service workers are exposed to significant doses of ionizing radiation, representing a clear radiological protection issue. To reduce exposure to eye lenses, it is recommended to use protective goggles when working with highly-radioactive elements.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2022, 35, 6; 753-760
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Safety of radiological and nuclear quasi-experiment – case study
Bezpieczeństwo quasi-eksperymentu radiologicznego i jądrowego – studium przypadku
Autorzy:
Smolarkiewicz, Marcin
Zwęgliński, Tomasz
Powiązania:
https://bibliotekanauki.pl/articles/24202699.pdf
Data publikacji:
2023
Wydawca:
Szkoła Główna Służby Pożarniczej
Tematy:
ionizing radiation
effective dose
CBRNE
quasi-experiment
promieniowanie jonizujące
dawka efektywna
quasi-eksperyment
Opis:
The aim of this paper is to present the results of the safety level measurement of radiological and nuclear (RN) quasi-experiment (q-E), which was carried out in 2016 in the Chernobyl Exclusion Zone, in Pripyat town, as part of the “End-user driven DEmo for cbrNe” project (EDEN, FP7/2012- 2016, under grant agreement no. 313077). The paper analyses the q-E executed in such a radiologically contaminated area of the town to verify a hypothesis that is formulated as follows: providing a safety plan and the correct execution of the q-E, including using appropriate personal protective equipment as well as following strict safety rules, guarantee an acceptable safety level for first responders taking a part in q-E conducted in Pripyat area as per relevant legal regulations. The experimental method with the quantitative measurements of effective gamma dose, using thermoluminescent dosimeters (TLD) and task related monitoring using electronic dosimeters (ED) was utilised. The individual effective gamma doses for each q-E participant, for two days of the exposure, have been measured. The total effective gamma doses for each participant have been calculated and compared with effective dose rates limits regulations. The obtained results proved that the assumed hypothesis was positively verified from the international and Polish legal standpoint, which defines gamma radiation thresholds for exposed personnel and ordinary persons.
Celem pracy jest przedstawienie wyników pomiaru poziomu bezpieczeństwa radiologicznego i jądrowego (RN) quasi-eksperymentu (q-E), który został przeprowadzony w 2016 r. w Czarnobylskiej Strefie Wykluczenia, w mieście Prypeć w ramach projektu „End-user driven DEmo for cbrNe” (EDEN, FP7/2012–2016, na podstawie umowy o dofinansowanie nr 313077). W artykule przeanalizowano q-E przeprowadzone na takim skażonym radiologicznie obszarze miasta, weryfikując hipotezę, która została sformułowana w następujący sposób: zapewnienie planu bezpieczeństwa i właściwe postępowanie podczas q-E, w tym stosowanie odpowiednich środków ochrony osobistej oraz przestrzeganie ścisłych zasad bezpieczeństwa, gwarantują z prawnego punktu widzenia akceptowalny poziom bezpieczeństwa dla pierwszych respondentów biorących udział w q-E przeprowadzonym na obszarze Prypeci. Zastosowano metodę eksperymentalną z ilościowym pomiarem efektywnej dawki gamma, przy użyciu dozymetrów termoluminescencyjnych (TLD) oraz monitorowanie związane z wykonywanym zadaniem przy użyciu dozymetrów elektronicznych (ED). Zmierzono indywidualne, efektywne dawki gamma dla każdego uczestnika q-E, dla dwóch dni ekspozycji. Obliczono całkowite efektywne dawki gamma dla każdego uczestnika i porównano je z przepisami dotyczącymi limitów dawek efektywnych. Otrzymane wyniki wykazały, że przyjęta hipoteza została pozytywnie zweryfikowana z punktu widzenia międzynarodowego i polskiego prawa, które określa progi promieniowania gamma dla personelu narażonego i zwykłych ludzi.
Źródło:
Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej; 2023, 85; 107--117
0239-5223
2720-0779
Pojawia się w:
Zeszyty Naukowe SGSP / Szkoła Główna Służby Pożarniczej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ocena ploidalnosci mutantów chryzantemy wielkokwiatowej (Dendranthema grandiflora Tzvelev) uzyskanych w wyniku mutagenezy indukowanej in vitro i in vivo promieniowaniem jonizującym
Evaluation of ploidy in chrysanthemum mutants [Dendranthema grandiflora Tzvelev] obtained in mutagenesis induced in vitro and in vivo by ionizing radiation
Autorzy:
Lema-Rumińska, J.
Zalewska, M.
Powiązania:
https://bibliotekanauki.pl/articles/11347078.pdf
Data publikacji:
2002
Wydawca:
Uniwersytet Przyrodniczy w Lublinie. Wydawnictwo Uniwersytetu Przyrodniczego w Lublinie
Tematy:
mutageneza indukowana in vivo
mutanty
Dendranthema grandiflora
mutageneza indukowana in vitro
chryzantema wielkokwiatowa
chromosomy
promieniowanie jonizujace
ploidalnosc
chromosome
in vitro mutagenesis
in vivo mutagenesis
ionizing radiation
mother chrysanthemum
mutant
ploidy
Opis:
Badano liczbę chromosomów w komórkach merystemów wierzchołkowych korzeni trzech odmian wyjściowych chryzantemy wielkokwiatowej (Dendranthema grandiflora Tzvelev) i odmian pochodnych, otrzymanych w wyniku radiomutacji. Wykazano, że tylko jedna odmiana mutacyjna – ‘Bronze Wonder’ miała inną liczb chromosomów niż odmiana wyjściowa ‘Lilac Wonder’.
The present research investigated the number of chromosomes in the cells of apical meristems of roots for three original Dendranthema grandiflora Tzvelev cultivars and the derivative cultivars obtained due to radiomutation. It was shown that only in one mutation cultivar, ‘Bronze Wonder’, the number of chromosomes differed from that of the original cultivar, ‘Lilac Wonder’.
Źródło:
Acta Scientiarum Polonorum. Hortorum Cultus; 2002, 01, 2; 43-48
1644-0692
Pojawia się w:
Acta Scientiarum Polonorum. Hortorum Cultus
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
5',8-Cyclo-2'-deoxyadenosine (cdA) formation by γ-radiation. Theoretical quantum mechanics study
Autorzy:
Karwowski, Boleslaw
Grand, Andre
Cadet, Jean
Powiązania:
https://bibliotekanauki.pl/articles/1040482.pdf
Data publikacji:
2009
Wydawca:
Polskie Towarzystwo Biochemiczne
Tematy:
5',8-cyclo-2'-deoxyadenosine
DNA damage
ionizing radiation
density functional theory (DFT)
Opis:
Reactions of reactive oxygen species and more specifically - of hydroxyl radical (•OH) - with nucleosides may lead to the generation of radicals in the base and 2-deoxyribose moieties. In the present study emphasis was put on the possible reaction modes of 2'-deoxyadenosine (dA) radicals, leading to the formation of related 5',8-cyclonucleosides. It appears that the prerequisite for the formation of 5',8-cyclo-2'-deoxyadenosine (cdA) is the adoption of O4'-exo conformation by 2-deoxyribose; however, this is the least energetically favored conformer among the different puckered forms adopted by the furanose ring. The O4'-exo conformation was found to be present in each of the discussed mechanisms.
Źródło:
Acta Biochimica Polonica; 2009, 56, 4; 655-662
0001-527X
Pojawia się w:
Acta Biochimica Polonica
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Investigation of irradiated biodegradable blends by FTIR and wide-angle X-ray diffraction
Autorzy:
Kodama, Y.
Machado, L. D. B.
Giovedi, C.
de Lima, N. B.
Nakayama, K.
Powiązania:
https://bibliotekanauki.pl/articles/148030.pdf
Data publikacji:
2009
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
WAXD
FTIR
PLLA
PCL
ionizing radiation
Opis:
In the present work, twin screw extruded films of PLLA and PCL biodegradable homopolymers and 50:50 (w:w) blend were irradiated with gamma rays from Co-60 and electron beam at doses in the range of 50 to 500 kGy in order to evaluate the effect of irradiations on homopolymers and blend. The FTIR results have shown that this technique was neither sensitive enough to observe the degradation promoted by ionizing radiation of studied homopolymers and blends and, nor on the miscibility of the blends. Wide-angle X-ray diffraction (WAXD) of PCL samples, non-irradiated and irradiated showed two strongest reflections at angles 2theta = 21.4 degrees centigrade and 2theta = 23.7 degrees centigrade that have been attributed in the literature to the (110) and (200) reflections, respectively. As for extruded non-irradiated and irradiated PLLA, it was observed broad diffusion peaks corresponding to an amorphous polymer. PLLA annealed samples showed reflections at angles 2theta =16.4 degrees centigrade and 2theta =18.7 degrees centigrade previously attributed in the literature to distorted 103 (alfa-form) helices. It was possible to observe slight alteration of the crystallite size of all irradiated samples of PCL in the dose range studied.
Źródło:
Nukleonika; 2009, 54, 2; 107-113
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Promieniowanie jonizujące w budynkach wielkopłytowych
Ionizing radiation in panel buildings
Autorzy:
Brunarski, L.
Dohojda, M.
Powiązania:
https://bibliotekanauki.pl/articles/183303.pdf
Data publikacji:
1999
Wydawca:
Instytut Techniki Budowlanej
Tematy:
budownictwo wielkopłytowe
stężenie
promieniowanie jonizujące
materiał budowlany
ochrona przed promieniowaniem
powietrze wewnętrzne
radon
promieniowanie gamma
promieniotwórczość naturalna
metoda badań
Opis:
Przedstawiono aktualny stan wiedzy na temat ochrony mieszkańców przed promieniowaniem jonizujacym. W szczególności omówiono charakterystykę samego czynnika zagrożenia i jego źródeł, obowiązujące wymagania, kryteria oceny oraz metody i wyniki dotychczasowych badań stężenia naturalnych pierwiastków promieniotwórczych w próbkach stosowanych materiałów budowlanych oraz tła promieniowania gamma i stężenia radonu w powietrzu w budynkach wielkopłytowych, a także możliwości ograniczenia infiltracji radonu z podłoża do wnętrza budynków. Artykuł stanowi zmienioną wersję referatu przedstawionego na V Konferencji Naukowo-Technicznej 'Warsztat pracy rzeczoznawcy budowlanego', która odbyła się w Kielcach w dniach 27-29 kwietnia 1999 r.
Among sources of ionizing radiation, natural radiation contributes the largest part of the total average annual effective dose equivalent to members of the population. Gamma radiation background and radon gas are the two factors affecting health risk of the people in buildings. Natural radioactivity of building materials, background radiation and indoor radon concentration measurements results available so far in Poland regard in relation to the requirements, testing methods and conformity criteria are presented. Concentrations of natural radioactive elements in mineral origin building materials as well as background levels and radon gas concentrations indoors are discussed as a whole and in the context of the problems of large panel buildings.
Źródło:
Prace Instytutu Techniki Budowlanej; 1999, R. 28, nr 1, 1; 3-21
0138-0796
Pojawia się w:
Prace Instytutu Techniki Budowlanej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Radiation activities and application of ionizing radiation on cultural heritage at ENEA Calliope gamma facility (Casaccia R.C., Rome, Italy)
Autorzy:
Baccaro, S.
Cemmi, A.
Powiązania:
https://bibliotekanauki.pl/articles/146412.pdf
Data publikacji:
2017
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
cultural heritage
gamma radiation
irradiation plant
radiation effects
scintillators
Opis:
Since the 1980s, research and qualification activities are being carried out at the 60Co gamma Calliope plant, a pool-type irradiation facility located at the Research Centre ENEA-Casaccia (Rome, Italy). The Calliope facility is deeply involved in radiation processing research and on the evaluation and characterization of the effects induced by gamma radiation on materials for different applications (crystals, glasses, optical fibres, polymers and biological systems) and on devices to be used in hostile radiation environment such as nuclear plants, aerospace and high energy physics experiments. All the activities are carried out in the framework of international projects and collaboration with industries and research institutions. In the present work, particular attention will be paid to the cultural heritage activities performed at the Calliope facility, focused on two different aspects: (a) conservation and preservation by bio-deteriogen eradication in archived materials, and (b) consolidation and protection by degraded wooden and stone porous artefacts consolidation.
Źródło:
Nukleonika; 2017, 62, 4; 261-267
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of ionizing radiation on the properties of PLA packaging materials
Autorzy:
Melski, K.
Kubera, H.
Głuszewski, W.
Zimek, Z.
Powiązania:
https://bibliotekanauki.pl/articles/147073.pdf
Data publikacji:
2011
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
packaging materials
radiation modification of polymers
radiation sterilization
packaging films
poly(lactic acid) (PLA)
Opis:
Poly(lactic acid) (PLA) is attractive as a substitute for classical polymer packaging material due to its biodegradability and sufficient mechanical and barrier properties. Presented research was focused on the changes of basic mechanical parameters after ionizing irradiation performed with doses in the range of 2.5–25 kGy, commonly used in radiation sterilization and preservation of foods. Two commercial available PLA packaging films were tested. The influence of radiation dose on the mechanical properties – tensile strength and elongation were determined using standardized methods. Radiation resistance of PLA is sufficient for packaging applications. The investigations of gas products of radiolysis of PLA have been made by gas chromatography after electron beam (EB) irradiations.
Źródło:
Nukleonika; 2011, 56, 1; 65-69
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Effect of hindered amine light stabilizers on the resistance of polypropylene towards ionizing radiation
Autorzy:
Przybytniak, G.
Mirkowski, K.
Rafalski, A.
Nowicki, A.
Legocka, I.
Zimek, Z.
Powiązania:
https://bibliotekanauki.pl/articles/148686.pdf
Data publikacji:
2005
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
polypropylene
stabilizers
HALS
electron beam
apparent viscosity
nucleation agent
Opis:
The influence of hindered amine light stabilizers (HALSs) on physical and mechanical properties of irradiated and non-irradiated isotactic polypropylene (PP) was studied. The stabilizers under investigation were: Tinuvin 765 (T765) and Tinuvin 622 (T622) - derivatives of 1,2,2,6,6-pentamethyl piperidine and Chimassorb 944 (C944) - a derivative of 2,2,6,6-tetramethyl piperidine. It was found that the stabilizers reduce the amount of peroxyl radicals in the amorphous phase of PP. The irradiation with electron beam causes a drop of apparent viscosity both in the original and in the modified PP however the effect is smaller in the presence of HALSs. Admixture of T622 and T765 stabilizers increases the crystallization temperature of non-irradiated PP by about 8 10°C (measured by DSC) what results from the facilitated formation of a large number small microcrystals. It was concluded that HALSs initiate two opposite tendencies - chemical protection against damage initiated by free radicals and, simultaneously, physical enhancement of sensitivity towards irradiation by the increase of nucleation density. In the studied systems, the presence of maleic anhydride does not improve compatibility between the polymeric matrix and HALSs.
Źródło:
Nukleonika; 2005, 50, 4; 153-159
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wielkoskalowy system do pomiarów dozymetrycznych w przemyśle i medycynie
Large-scale system for dosimetric measurements in industry and medicine
Autorzy:
Urban, P.
Skubacz, K.
Powiązania:
https://bibliotekanauki.pl/articles/370747.pdf
Data publikacji:
2013
Wydawca:
Wyższa Szkoła Zarządzania Ochroną Pracy w Katowicach
Tematy:
promieniowanie jonizujące
dozymetria
termoluminescencja
pola mieszane
ionizing radiation
dosimetry
thermoluminescence
mixed fields
Opis:
W przemyśle, medycynie i nauce stosuje się wiele urządzeń wykorzystujących promieniowanie jonizujące, co rodzi konieczność monitorowania wynikających stąd zagrożeń. Jedną z najpowszechniej stosowanych obecnie metod detekcji promieniowania jest dozymetria termoluminescencyjna. W pracy opisano system pomiarowy firmy Panasonic oparty na tej technice i przeznaczony do oceny dawek w mieszanych polach promieniowania jonizującego o różnej energii. Jednocześnie z pomocą dawkomierzy UD-802, które są najbardziej popularnymi dawkomierzami stosowanymi w tym systemie, wykonano szereg pomiarów w placówkach medycznych stosujących instalacje do wytwarzania promieniowania jonizującego. Uzyskane wyniki porównano z rezultatami osiągniętymi równolegle przez dawkomierze Gamma-31, które są od dawna stosowane w Głównym Instytucie Górnictwa do oceny zagrożenia w podziemnych zakładach górniczych, gdzie mogą występować promieniotwórcze osady, emitujące promieniowanie gamma. Dla celów obligatoryjnego systemu kontroli w tych zakładach i środowiska wokół nich mogą być również stosowane dawkomierze UD- 802, chociaż ich konstrukcja jest bardziej wrażliwa na niekorzystne warunki środowiskowe (zapylenie, wilgotność i uszkodzenia mechaniczne).
Plenty of devices using ionizing radiation, found application in industry, medicine and science. This application may cause the necessity for monitoring related hazards. One of widely applicable methods for radiation detection which is currently in use is thermo luminescence dosimetry. This publication describes the measuring system based on the same technique made by Panasonic. The system is intended for dose assessment in mixed radiation field with various energies. Simultaneously, by means of the Panasonic dosimeters, which are the most popular in this kind of systems, several measurements in medical institutions using the installations for ionizing radiation production, were made. All results were compared with indication of the dosimeters Gamma-31(exposed in the same time) which have for many years been used in Central Mining Institute. Gamma-31 are intended for assessment of radiological hazard in underground coal mines, caused by radioactive sediments emitting gamma radiation. For the purposes of mandatory control system in the mines and the environment around them, UD-802 dosimeters can also be used, although their construction is more sensitive to adverse environmental conditions (dust, moisture and mechanical damage).
Źródło:
Zeszyty Naukowe Wyższej Szkoły Zarządzania Ochroną Pracy w Katowicach; 2013, 1(9); 68-82
1895-3794
2300-0376
Pojawia się w:
Zeszyty Naukowe Wyższej Szkoły Zarządzania Ochroną Pracy w Katowicach
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Podstawy metodyczne doświadczeń na zwierzętach z użyciem promieniowania jonizującego
Methodological bases of animal experiments using ionizing radiation
Autorzy:
Gajewski, A.K.
Rozycki, Z.
Powiązania:
https://bibliotekanauki.pl/articles/875803.pdf
Data publikacji:
1974
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
promieniowanie jonizujace
zwierzeta doswiadczalne
zwierzeta laboratoryjne
czynniki fizyczne
czynniki biologiczne
plec
wiek
Źródło:
Roczniki Państwowego Zakładu Higieny; 1974, 25, 5
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Program Erasmus+ szansą dla młodych naukowców
The Erasmus+ programme the chance for the young scientists
Autorzy:
Boguski, J.
Zwolińska, E.
Powiązania:
https://bibliotekanauki.pl/articles/214107.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
program Erasmus+
promieniowanie jonizujące
radiacyjna modyfikacja polimerów
Erasmus+ programme
ionizing radiation
radiation modification of polymers
Opis:
Artykuł stanowi sprawozdanie z przebiegu cyklu wykładów zorganizowanych w ramach programu Erasmus+ pt. „Wspólny innowacyjny program szkolenia/nauczania mający na celu rozwój i transfer wiedzy na temat zastosowania promieniowania jonizującego w przetwórstwie materiałów”, który miał miejsce w dniach 7–18 września (Warszawa, IChTJ) oraz 27 września – 3 października (Palermo, UNIPA) 2015 r. Cykl ten obejmował wykłady najlepszych specjalistów z pięciu krajów (Turcja, Włochy, Litwa, Francja oraz Polska) i dotyczył szeroko pojętej tematyki oddziaływania promieniowania jonizującego na materię w takich dziedzinach, jak modyfikacja polimerów czy nanotechnologia. W programie uczestniczyło 39 studentów i doktorantów z sześciu europejskich krajów oraz Turcji. Realizacja niniejszego programu zakończyła się sukcesem. Osiągnięto zakładane cele, z których należy wymienić m.in. zwiększenie poziomu edukacji, poprawę kompetencji słuchaczy, czy wzmocnienie współpracy międzynarodowej.
The article is a report on lecture series organized in the frame of Erasmus+ program entitled “Joint innovative training and teaching/learning program in enhancing development and transfer knowledge of application of ionizing radiation in materials processing”, which took place on the 7–18 September (Warsaw, INCT) and 27 September – 3 October (Palermo, UNIPA) 2015. The lectures were given by the best experts from five countries (Turkey, Italy, Lithuania, France and Poland) in ionizing radiation effects on matter, especially in the field of polymer modification and nanotechnology. The 39 students from the six European countries and Turkey were participated in the program. The Erasmus+ program was a success. The aims achieved like improvement of education level, improvement of student’s competence and intensification of international cooperation were realized.
Źródło:
Postępy Techniki Jądrowej; 2015, 4; 9-12
0551-6846
Pojawia się w:
Postępy Techniki Jądrowej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The use of DRS and GC to study the effects of ionizing radiation on paper artifacts
Autorzy:
Głuszewski, W.
Boruc, B.
Kubera, H.
Abbasowa, D.
Powiązania:
https://bibliotekanauki.pl/articles/147776.pdf
Data publikacji:
2015
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
electron beam (EB)
disinfection
disinfestation
diffuse reflection spectrometry (DRS)
paper
gas chromatography
Opis:
Radiation preservation of objects of historical significance is an interesting proposition for museums, archives, libraries and private collectors. In this paper, we have limited ourselves to studying the effects of ionizing radiation on the paper. The radiation resistance of various grades of paper was examined in INCT. Irradiations were done by electron beam (10 MeV, 10 kW) and by gamma radiation (7 kG/h), for the purpose of comparison. Yields of hydrogen and absorption of oxygen were determined by gas chromatography (GC). For this purpose, the first time in an original way was used diffuse reflection spectroscopy (DRS). Described as the dose, dose rate, and lignin were found to affect degradation processes of cellulose. Examined the protective effect of lignin in the process of radiation degradation of paper. Proposed research methodology can be successfully applied to study other materials relevant to the conservation of works of art.
Źródło:
Nukleonika; 2015, 60, No. 3, part 2; 665-668
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Problemy ochrony zdrowia przed szkodliwym działaniem promieniowania jonizującego
Autorzy:
Graczewski, J.
Powiązania:
https://bibliotekanauki.pl/articles/874233.pdf
Data publikacji:
1959
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
ochrona zdrowia
promieniowanie jonizujace
odpady radioaktywne
szkolenie kadr
sluzba zdrowia
ochrona przed promieniowaniem
health protection
ionizing radiation
radioactive waste
staff training
health service
radiation protection
Źródło:
Roczniki Państwowego Zakładu Higieny; 1959, 10, 1
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Lycopene - antioxidant with radioprotective and anticancer properties. A review
Autorzy:
Gajowik, A.
Dobrzynska, M.M.
Powiązania:
https://bibliotekanauki.pl/articles/876256.pdf
Data publikacji:
2014
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
lycopene
antioxidant
radioprotection
radioprotective property
anticancer property
anticarcinogenic agent
ionizing radiation
reactive oxygen species
chronic disease
cancer
human disease
human health
Opis:
Ionizing radiation may cause damage to living tissue by producing free radicals like reactive oxygen species (ROS). ROS can randomly react with lipids, proteins and nucleic acids of cell causing oxidative stress and damage in these macromolecules, leading to pathogenesis of chronic diseases and age related and also cancer. The first line of defense from the damaging effects of ROS is antioxidants, which convert the oxidants to less reactive species. Lycopene (LYC) is an acyclic isomer of beta-carotene. It synthesized by plants or autotrophic bacteria but not by animals. Red fruits and vegetables, including tomatoes, watermelons, pink grapefruits, apricots, pink guavas and papaya contain LYC. This carotenoid has very strong antioxidant properties. The many studies confirm that dietary supplementation with LYC reduces risk of cancers of many organs, but also retard the growth of the tumors. LYC has also chemopreventive effects against other diseases such as cardiovascular disease, osteoporosis, male infertility and inhibits the toxic action of other agents. Numerous in vitro and animal studies showed that LYC may provide protection against damages induced by ionizing radiation. It suggests that supplementation of LYC might be useful in diminishing of negative effect of cancer radiotherapy or in mitigating the effects of possible radiation accidents on human health.
Promieniowanie jonizujące może powodować uszkodzenia żywej tkanki poprzez wytwarzanie wolnych rodników takich jak reaktywne formy tlenu (RFT). RFT mogą przypadkowo wchodzić w reakcję z lipidami, białkami lub kwasami nukleinowymi komórki, powodując stres oksydacyjny i uszkodzenia w tych makrocząsteczkach, co prowadzi do patogenezy chorób przewlekłych i związanych z wiekiem, a także do zachorowania na raka. Pierwsza linia obrony przed szkodliwym działaniem RFT to przeciwutleniacze, które przekształcają utleniacze do form mniej reaktywnych. Likopen (LYC) jest acyklicznym izomerem beta-karotenu. Jest on syntetyzowany przez rośliny i bakterie autotroficzne, ale nie przez zwierzęta. Czerwone owoce i warzywa, w tym pomidory, arbuzy, różowe grejpfruty, morele, papaja i różowe guawy zawierają LYC. Ten karotenoid ma bardzo silne właściwości antyoksydacyjne. Liczne badania potwierdzają, że suplementacja LYC zmniejsza ryzyko raka wielu narządów, a także opóźnia wzrost guza. LYC ma działanie zapobiegawcze również przeciwko innym chorobom, takim jak choroby układu krążenia, osteoporoza, niepłodność, oraz hamuje toksyczne działanie innych czynników. Badania in vitro i nad zwierzętami wykazały, że LYC może zapewnić ochronę przed uszkodzeniami indukowanymi przez promieniowanie jonizujące. Sugeruje to, że suplementacja LYC może być przydatna w zmniejszaniu negatywnego wpływu radioterapii na zdrowie człowieka lub w łagodzeniu skutków ewentualnych wypadków radiacyjnych.
Źródło:
Roczniki Państwowego Zakładu Higieny; 2014, 65, 4
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on organic radicals giving rise to multicomponent EMR spectra in dried fruits expose to ionizing radiation II. D-Glucose
Autorzy:
Guzik, G. P.
Stachowicz, W.
Powiązania:
https://bibliotekanauki.pl/articles/147173.pdf
Data publikacji:
2013
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
dried fruits
electron magnetic resonance (EMR)
irradiation
glucose
organic radicals
Opis:
Crystalline D-glucose extracted from dried resins was irradiated with 60Co gamma rays. The multicomponent EMR spectra of the samples kept at ambient temperature were compared with those heated at 105°C – the temperature close to the melting point of glucose. Normalized EMR spectra recorded with both samples were subtracted, resulting in a differential EMR spectrum. Spectral analysis of all three spectra has been done resulting in the identification of isotropic doublet of doublets assigned to less stable radical derived from parent glucose molecule.
Źródło:
Nukleonika; 2013, 58, 3; 425-428
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Genotoxic effects of 60Co gamma-rays on Chinese hamster ovary (CHO) cells
Autorzy:
Dicu, T.
Brie, I.
Virag, P.
Fischer, E.
Perde, M.
Foriş, V.
Cernea, V.
Cosma, C.
Powiązania:
https://bibliotekanauki.pl/articles/147740.pdf
Data publikacji:
2008
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
cellular radiosensitivity
genotoxic effects
ionizing radiation
comet assay
Opis:
The aim of the present study was to evaluate the cellular radiosensitivity and radiation-induced DNA damage and repair in Chinese hamster ovary (CHO) cells. Cell survival after irradiation was assessed using the clonogenic assay. The initial, radio-induced and residual DNA damage in Chinese hamster ovary (CHO) cells exposed to 60Co gamma-rays were determined using the alkaline comet assay. A linear-quadratic (LQ) survival curve was observed in CHO line. Data obtained by comet assay demonstrated a linear dose-response correlation in the range of tested doses (0.3-4 Gy). The process of DNA repair was modeled by exponential equation. In addition, we found a good correlation (R2 = 0.995) between clonogenic cell survival and radio-induced DNA damage.
Źródło:
Nukleonika; 2008, 53, 4; 161-165
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of ionizing radiation on SrLaGa(3)O(7) single crystals doped with rare -- earth elements
Autorzy:
Kaczmarek, Sławomir.
Jabłoński, Ryszard.
Pracka, Izabella.
Boulon, George.
Łukasiewicz, Tadeusz.
Moroz, Zbigniew.
Warchoł, Stanisław.
Stępka, Krzysztof.
Powiązania:
Biuletyn Wojskowej Akademii Technicznej 1997, nr 12, s. 133-148
Data publikacji:
1997
Tematy:
Optoelektronika
Promieniowanie jonizujące
Absorpcja
Luminescencja
Opis:
Wpływ promieniowania jonizującego na monokryształy SrLaGa3O7 domieszkowane jonami ziem rzadkich.
Rys., tab.; Bibliogr.; Abstr., rez., streszcz.
Dostawca treści:
Bibliografia CBW
Artykuł
Tytuł:
Zaawansowane technologie detekcji promieniowania jonizującego w urządzeniach przenośnych
Advanced technologies of ionizing radiation detection in portable devices
Autorzy:
Nowicki, Andrzej
Powiązania:
https://bibliotekanauki.pl/articles/214017.pdf
Data publikacji:
2020
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
detekcja promieniowania gamma
detekcja neutronów
scyntylatory
diody PiN
SiPM
gamma and neutron radiation detection
scintillators
PiN diodes
Opis:
Zasygnalizowano aktualne tendencje w konstrukcji przenośnych urządzeń do pomiaru promieniowania jonizującego pozwalające na miniaturyzację detektorów przy równoczesnym zwiększeniu ich możliwości pomiarowych. Przedstawiono kilka rozwiązań technicznych, w tym radiometru MKS-11GN SPECTRA ze względu na internetowe wzmianki o jego stosowaniu w Polsce.
The current tendencies in the construction of portable counters for measuring ionizing radiation including miniaturization of detectors while increasing their measuring capabilities have been indicated. A number of technical solutions were presented, including the MKS-11GN SPECTRA radiometer due to its probably use in Poland.
Źródło:
Postępy Techniki Jądrowej; 2020, 3; 10-15
0551-6846
Pojawia się w:
Postępy Techniki Jądrowej
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Retrieval Irradiated Entomopahthogenic Nematodes – Steinernema feltiae (Filipiev, 1934) from the Soil
Odzyskiwanie napromieniowanych nicieni entomopatogennych Steinernema feltiae (Filipiev, 1934) ze środowiska glebowego
Autorzy:
Poleszczuk, G.
Pezowicz, E.
Tumialis, D.
Powiązania:
https://bibliotekanauki.pl/articles/389347.pdf
Data publikacji:
2011
Wydawca:
Towarzystwo Chemii i Inżynierii Ekologicznej
Tematy:
promieniowanie jonizujące
nicienie entomopatogenne
Steinernema feltiae
ionizing radiation
entomopathogenic nematodes
Opis:
Przeprowadzono badania w celu odzyskania napromieniowanych nicieni entomopatogennych z gleby. Do dooewiadczenia użyto larw inwazyjne S. feltiae pochodzące z biopreparatu Ovinema oraz dziki szczep pozyskany z terenu (Biała Podlaska). Nicienie były poddane działaniu promieniowania gamma (źródło 60Co). Wykazano różnice w działanie poszczególnych dawek promieni gamma oraz odmienne reakcje użytych szczepów nicieni na zastosowane promieniowanie.
Infective juveniles Steinernema feltiae obtained in the field (Biała Podlaska) and from biopreparation Ovinema were used in the study. Gamma rays ie electromagnetic wave emitted by nuclei of excited radioactive atoms of 60Co were used in experiments. The differences were revealed among applied doses and nematode strains response to irradiation. The same species may respond to a given factor in various ways. Confirmation of the phenomenon of radiation hormesis needs many repetitions and seems accidental. Changes in the nematode genotype under the effect of gamma radiation or of other mutagenic factors might be used in future production of biopreparations.
Źródło:
Ecological Chemistry and Engineering. A; 2011, 18, 5-6; 801-804
1898-6188
2084-4530
Pojawia się w:
Ecological Chemistry and Engineering. A
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Comparison of the effects of bleomycin and ionizing radiation in two sublines of murine lymphoma L5178Y
Autorzy:
Kruszewski, M.
Zaim, J.
Grądzka, I.
Szumiel, I.
Powiązania:
https://bibliotekanauki.pl/articles/147561.pdf
Data publikacji:
2001
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
bleomycin
comet assay
DNA damage
gamma radiation
single cell gel electrophoresis
Opis:
We compared the effects of bleomycin (BLM) and ionizing radiation on two sublines of murine lymphoma L5178Y (LY): LY-R, radiation resistant and LY-S, radiation sensitive. This radiosensitivity difference is related to the ability to rejoin DNA double strand breaks. LY-S cells were about two times more sensitive to BLM than LY-R, similarly as in the case of sensitivity to X rays. Since there was no difference in the P-glycoprotein-related drug transport system between the sublines, it could be expected that the enhanced sensitivity of LY-S cells to BLM was caused by the DNA repair defect. Growth disturbances in BLM treated cell populations were proportional to the lethal effect and their duration was observed until elimination of dead cells (3-6 days after 50 ěM BLM, 1 h at 37oC). There was no slow growth phase accompanied by normal viability, as previously described for X-irradiated LY-S cells. Initial DNA damage, estimated with the single cell gel electrophoresis method was linearly related to BLM dose in LY-S cells; in LY-R cells - in the low dose range (up to 10 ěM) - there was more damage than in LY-S cells, however, at higher doses the dose - effect curves became identical. The doseeffect relationship for ă rays was linear and identical in both cell sublines. DNA damage distribution in BLM treated cells was much less uniform as compared to that in irradiated cells and indicated the presence of cells with severely damaged DNA, a feature typical for BLM action in vitro.
Źródło:
Nukleonika; 2001, 46, 3; 81-86
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Badanie wyrobów aerozolowych w Laboratorium Badań Radiograficznych OUM w Warszawie
Testing of aerosols in the Radiographic Research Laboratory at OUM Warsaw
Autorzy:
Sawicki, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/1426275.pdf
Data publikacji:
2020
Wydawca:
Główny Urząd Miar
Tematy:
radiografia cyfrowa
promieniowanie jonizujące
wzorcowanie metodą wagową
digital radiography
ionizing radiation
calibration by weight method
Opis:
W artykule przedstawiono powody utworzenia Laboratorium Badań Radiograficznych w Okręgowym Urzędzie Miar w Warszawie. Opisano metodę wyznaczania objętości wyrobów aerozolowych w oparciu o radiografię cyfrową z zastosowaniem promieniowania jonizującego. Zaprezentowano stanowisko pomiarowe wykorzystujące promieniowanie jonizujące oraz stanowisko pomiarowe do wzorcowania pojemników aerozolowych metodą wagową.
The article presents the reasons for the establishing the Radiographic Research Laboratory at the Regional Office of Measures in Warsaw. The method of evaluation the volume of aerosols based on digital radiography with the use of ionizing radiation is described. A measuring system using ionizing radiation and a measuring system for calibration of aerosol cans by weight method are presented.
Źródło:
Metrologia i Probiernictwo : biuletyn Głównego Urzędu Miar; 2020, 2 (25); 55--60
2300-8806
Pojawia się w:
Metrologia i Probiernictwo : biuletyn Głównego Urzędu Miar
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The assessment of exposure to ionizing radiation at spoil banks
Ocena zagrożenia radiacyjnego na składowiskach odpadów górniczych
Autorzy:
Michalik, B.
Powiązania:
https://bibliotekanauki.pl/articles/340835.pdf
Data publikacji:
2004
Wydawca:
Główny Instytut Górnictwa
Tematy:
odpady radioaktywne
NORM na terenach górniczych
Górnośląskie Zagłębie Węglowe
radioactive wastes
NORM in mining areas
Upper Silesian Coal Basin
Źródło:
Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa; 2004, 1; 134-135
1643-7608
Pojawia się w:
Prace Naukowe GIG. Górnictwo i Środowisko / Główny Instytut Górnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
The influence of ODM technique on the radiation dose received by patients during head CT scan
Autorzy:
Sobczyk, Joanna
Pusz-Sapa, Aleksandra
Wojtasik, Aneta
Gaweł, Greta
Truszkiewicz, Adrian
Guz, Wiesław
Powiązania:
https://bibliotekanauki.pl/articles/454704.pdf
Data publikacji:
2018
Wydawca:
Uniwersytet Rzeszowski. Wydawnictwo Uniwersytetu Rzeszowskiego
Tematy:
organ dose modulation
computed tomography
protection against ionizing radiation
Opis:
Introduction. Computed tomography (CT) is inexpensive radiological examination of high diagnostic effectiveness. However, common use of CT tests has led to increased exposure to ionizing radiation in the population. Aim. To assess the effect of organ dose modulation (ODM) technique on the radiation dose received by patients during head CT scan. Material and methods. A retrospective analysis of 120 tests in two groups of patients who had CT scans without and with ODM. Every group consisted of 60 people (30 women and 30 men in each). The ability to perform tests in two algorithms (without and with ODM) resulted from the fact that after installing the apparatus, tests were carried out using standard technique, and only then the ODM function was launched. Results. We found that during examinations with ODM, patients received a reduced dose of ionizing radiation. The mean DLP value with ODM is 9.4% lower than the mean DLP value without ODM by comparing the tests with and without contrasting agent. The mean DLP value obtained in men using ODM was 11.9% lower than the mean dose without ODM, and in women this difference was 6.6%. Conclusion. The mean DLP value received by men with ODM was by 11.9% lower than the mean dose without ODM, and in women this difference was 6.6%. Patients receive a lower dose both in tests with and without a contrasting agent compared to the tests where ODM was not used. A statistical significance of the obtained results was found.
Źródło:
European Journal of Clinical and Experimental Medicine; 2018, 3; 198-203
2544-2406
2544-1361
Pojawia się w:
European Journal of Clinical and Experimental Medicine
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wpływ promieniowania jonizującego na szkodniki zbóż. II. Wpływ promieniowania gamma radiokobaltu na rozkruszka mącznego (Tyroglyphus farinae L.)
Vlijanie ionizirujushhego izluchanija na khlebnye parasity. Chast II. Vlijanie izluchanija radiokobalta na ambarnye kleshhi Tyroglyphus farinae L.
Effects of ionizing radiation on pests in cereals. II. Effects of Co-60 radiation on Tyroglyphus farinae mites
Autorzy:
Szyszko, E.
Wozniak, J.
Malesa, J.
Powiązania:
https://bibliotekanauki.pl/articles/875135.pdf
Data publikacji:
1962
Wydawca:
Narodowy Instytut Zdrowia Publicznego. Państwowy Zakład Higieny
Tematy:
promieniowanie jonizujace
promieniowanie gamma
skutki promieniowania
zboza
szkodniki
rozkruszek maczny
Tyroglyphus farinae
dawki promieniowania
ionizing radiation
gamma-radiation
radiation effect
cereal
pest
flour mite
radiation dose
Źródło:
Roczniki Państwowego Zakładu Higieny; 1962, 13, 5
0035-7715
Pojawia się w:
Roczniki Państwowego Zakładu Higieny
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Study on stable radicals produced by ionizing radiation in dried fruits and related sugars by electron paramagnetic resonance spectrometry and photostimulated luminescence method – I. D-fructose
Autorzy:
Guzik, G. P.
Stachowicz, W.
Michalik, J.
Powiązania:
https://bibliotekanauki.pl/articles/147212.pdf
Data publikacji:
2008
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
fructose
PPSL
EPR
irradiation
detection
food products
Opis:
Stability of sugar born radicals separated from irradiated Iranian dried raisins and from D-fructose by Sigma Aldrich has been studied at room temperature by EPR and PPSL methods in a period of 360 days. It has been proven for the first time experimentally that the complex EPR spectrum of irradiated sugars is changed in time and after heating. Hence, this made it possible to distinguish spectral lines of two specific radicals contributing to the formation of multicomponent spectra, recorded in both time dependent and heating experiments. The radicals measured by EPR and energy traps detected by PPSL decay at room temperature in a similar way, suggesting a similar distribution of both species in sugar crystallites. We think that our experimental approach might be useful to study interrelation between the formation and trapping of radicals and energy accumulated in crystalline matrices. In order to achieve the isolation of individual sugars from fruits the extraction and specific separation procedures have been adapted with the use of methanol, ethanol and water solvents. Our results clearly show that radicals induced by radiation in fruits (with fructose born radicals as major constituent) are stable enough at room temperature for easy identification of irradiated raisins using the EPR method.
Źródło:
Nukleonika; 2008, 53, suppl. 2; 89-94
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Wykorzystanie środowiska MATLAB w analizie promieniowania jonizującego wynikającego z wyładowań niezupełnych
The use of MATLAB in the analysis of ionizing radiation resulting from the partial discharge
Autorzy:
Nagi, Ł.
Schneider, P.
Powiązania:
https://bibliotekanauki.pl/articles/378220.pdf
Data publikacji:
2013
Wydawca:
Politechnika Poznańska. Wydawnictwo Politechniki Poznańskiej
Tematy:
promieniowanie jonizujące
wyładowania niezupełne
WNZ
odczyt radiacyjny
diagnostyka sieci elektroenergetycznych
Opis:
W artykule przedstawiono wyniki pomiarów promieniowania jonizującego wynikającego z wyładowań niezupełnych (WNZ). Analiza i opracowanie otrzymanych danych zostały wykonane w środowisku MATLAB. Przywołane zostały metody diagnostyczne do wykrywania WNZ, jednocześnie opisane zostały efekty radiacyjne wynikające z wyładowań niezupełnych. Zauważono, że wraz ze wzrostem napięcia, na wadliwej izolacji gdzie występują WNZ zwiększa się dawka promieniowania wykrywana przez Rentgenoradiometr Geigera-Mullera. W celu teoretycznego potwierdzenia wyników wykonano również dodatkowe modelowanie krzywych w środowisku MATLAB.
The paper presents the results of measurements of ionizing radiation resulting from partial discharge (PD). Analysis and processing the recaived data where done in MATLAB. We write about diagnostic metods to detect PD, about radiaton (X-Rays) and effects of radiation that are the result of partial discharge. It was noted that with the increase in voltage in damaged isulation where PD occur the radiation dose detected by Geiger-Muller Rentgenoradiometr increases too. In order to confirm the theoretical results we were also performed additional modeling curves in MATLAB.
Źródło:
Poznan University of Technology Academic Journals. Electrical Engineering; 2013, 74; 167-170
1897-0737
Pojawia się w:
Poznan University of Technology Academic Journals. Electrical Engineering
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Electron beam technology for biogas and biofertilizer generation at municipal resource recovery facilities
Autorzy:
Chmielewski, Andrzej G.
Sudlitz, Marcin
Han, Bumsoo
Pillai, Suresh D.
Powiązania:
https://bibliotekanauki.pl/articles/2055685.pdf
Data publikacji:
2021
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
biogas
biofertilizer
cogeneration
electron beam
ionizing radiation
municipal wastewater plant sludge
phosphorus
resource recovery facility
sludge hygenization
Opis:
In the era of circular economies, municipal wastewater treatment plants (WWTPs) are viewed as resource recovery facilities. At the very minimum, the targeted resources are water, biogas, and phosphorus. However, municipal wastewater streams (sludge and effluent) need to be adequately treated to eliminate the potential for the transmission of microbial pathogens including protozoa, bacteria, and viruses. This paper presents the results from a study demonstrating the use of electron beam technology for sludge hygenization and enhanced methane (biogas) production using municipal wastewater samples. Cogeneration of heat for fertilizer drying and granulation and electricity for powering the electron beam system are also demonstrated.
Źródło:
Nukleonika; 2021, 66, 4; 213--219
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł

Ta witryna wykorzystuje pliki cookies do przechowywania informacji na Twoim komputerze. Pliki cookies stosujemy w celu świadczenia usług na najwyższym poziomie, w tym w sposób dostosowany do indywidualnych potrzeb. Korzystanie z witryny bez zmiany ustawień dotyczących cookies oznacza, że będą one zamieszczane w Twoim komputerze. W każdym momencie możesz dokonać zmiany ustawień dotyczących cookies