Skocz do pozycji: 1.

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

/5

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Skocz do pozycji: 2.

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

/5

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Skocz do pozycji: 3.

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

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Skocz do pozycji: 4.

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

/5

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Skocz do pozycji: 5.

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

/5

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Skocz do pozycji: 6.

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

/5

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Skocz do pozycji: 7.

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

/5

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Skocz do pozycji: 8.

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

/5

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Skocz do pozycji: 9.

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

/5

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Skocz do pozycji: 10.

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

/5

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Skocz do pozycji: 11.

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

/5

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Skocz do pozycji: 12.

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

/5

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Skocz do pozycji: 13.

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

/5

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Skocz do pozycji: 14.

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

/5

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Skocz do pozycji: 15.

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

/5

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Skocz do pozycji: 16.

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

/5

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Skocz do pozycji: 17.

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

/5

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Skocz do pozycji: 18.

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

/5

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Skocz do pozycji: 19.

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

/5

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Skocz do pozycji: 20.

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

/5

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Skocz do pozycji: 21.

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

/5

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Skocz do pozycji: 22.

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

/5

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Skocz do pozycji: 23.

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

/5

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Skocz do pozycji: 24.

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

/5

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Skocz do pozycji: 25.

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

/5

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Skocz do pozycji: 26.

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

/5

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Skocz do pozycji: 27.

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

/5

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Skocz do pozycji: 28.

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

/5

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Skocz do pozycji: 29.

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

/5

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Skocz do pozycji: 30.

Tytuł:

Radon - jak go unikać?

Autorzy:

Derugo, A.

Powiązania:

https://bibliotekanauki.pl/articles/274311.pdf

Data publikacji:

2010

Wydawca:

Roble

Tematy:

radon
promieniowanie jonizujące
pomiar promieniowania
ionizing radiation
radiation measurement

Źródło:

LAB Laboratoria, Aparatura, Badania; 2010, 15, 4; 16-19
1427-5619

Pojawia się w:

LAB Laboratoria, Aparatura, Badania

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 31.

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

/5

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Skocz do pozycji: 32.

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

/5

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Skocz do pozycji: 33.

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

/5

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Skocz do pozycji: 34.

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

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Skocz do pozycji: 35.

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

/5

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Skocz do pozycji: 36.

Tytuł:

Changes in phosphorylation of histone H2A.X and p53 in response of peripheral blood lymphocytes to gamma irradiation

Autorzy:

Vilasová, Zdeňka
Řezáčová, Martina
Vávrová, Jiřina
Tichý, Aleš
Vokurková, Doris
Zoelzer, Friedo
Řeháková, Zuzana
Osterreicher, Jan
Lukášová, Emilie

Powiązania:

https://bibliotekanauki.pl/articles/1040760.pdf

Data publikacji:

2008

Wydawca:

Polskie Towarzystwo Biochemiczne

Tematy:

lymphocyte
ionizing radiation
p53
phytohemagglutinin (PHA)
apoptosis
DNA damage

Opis:

The main aim of this study was to compare the reaction of quiescent and proliferating, i.e. phytohemagglutinin (PHA)-stimulated, human peripheral blood mononuclear cells (PBMCs) to γ-radiation, and analyse changes of proteins related to repair of DNA damage and apoptosis, such as γH2A.X, p53, p53 phosphorylation at serines-15 and -392, and p21 and their dose dependence. Freshly isolated PBMCs in peripheral blood are predominantly quiescent, in G0 phase, and with very low amounts of proteins p53 and p21. Using confocal microscopy we detected dose dependent (0.5-5 Gy) induction of foci containing γH2A.X (1 h after γ-ray exposure), which are formed around radiation-induced double strand breaks of DNA. Apoptosis was detected from 24 h after irradiation by the dose of 4 Gy onwards by Annexin V binding and lamin B cleavage. Seventy two hours after irradiation 70% of CD3+ lymphocytes were A+. Neither increase in p53 nor its phosphorylation on serine-392 after irradiation was detected in these cells. However, massive increase in p21 (cyclin-dependent kinase inhibitor 1A) was detected after irradiation, which can be responsible for late occurrence of apoptosis in these quiescent cells. PHA-stimulation itself (72 h) caused an increase in early apoptosis (A+PI-) in comparison to non-stimulated PBMCs (38% A+ resp. 13.4%). After PHA-stimulation also the amount of γH2A.X, p53, and p21 increased, but no phosphorylation of p53 on serine-392 or -15 was detected. Reaction to γ-radiation was different in PHA-stimulated lymphocytes: the p53 pathway was activated and p53 was phosphorylated on serines-15 and -392 4 h after irradiation by the dose of 4 Gy. Phosphorylation of p53 at serine-15 increased in a dose-dependent manner in the studied dose range 0.2-7.5 Gy. Also the amount of p21 increased after irradiation. Seventy two hours after irradiation of PHA-stimulated CD3+ T lymphocytes by the dose of 4 Gy 65% of cells were A+.

Źródło:

Acta Biochimica Polonica; 2008, 55, 2; 381-390
0001-527X

Pojawia się w:

Acta Biochimica Polonica

Dostawca treści:

Biblioteka Nauki

/5

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Skocz do pozycji: 37.

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

/5

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Skocz do pozycji: 38.

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

/5

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Skocz do pozycji: 39.

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

/5

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Skocz do pozycji: 40.

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

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Skocz do pozycji: 41.

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

/5

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Skocz do pozycji: 42.

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

/5

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Skocz do pozycji: 43.

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

/5

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Skocz do pozycji: 44.

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

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Skocz do pozycji: 45.

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

/5

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Skocz do pozycji: 46.

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

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Skocz do pozycji: 47.

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

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Skocz do pozycji: 48.

Tytuł:

Wykorzystanie radiometru rum-2 do analizy promieniowania gamma w wybranych materiałach budowlanych
Use of radiometer rum-2 for analysis of gamma radiation in some building Materials

Autorzy:

Pach, K.
Hyla, M.
Filipecki, J.

Powiązania:

https://bibliotekanauki.pl/articles/952249.pdf

Data publikacji:

2015

Wydawca:

Uniwersytet Humanistyczno-Przyrodniczy im. Jana Długosza w Częstochowie. Wydawnictwo Uczelniane

Tematy:

promieniowanie jonizujące
spektrometria
materiały budowlane
ionizing radiation
mass spectrometry
building materials

Opis:

Promieniowanie jonizujące to czynnik, który w ważnym stopniu pozwala scharakteryzować środowisko człowieka a także warunki higieniczno - sanitarne, jakie panują w budynkach przeznaczonych na stały pobyt ludzi. Dla organizmów żywych istotne znaczenie odgrywają dwa czynniki: - tło promieniowania oddziałujące na organizmy żywe - promieniowanie alfa produktów rozpadu radonu oddziałujące na układ oddechowy. Występowanie radonu i jego pochodnych w pomieszczeniach budynków mieszkalnych może pochodzić przede wszystkim z gruntu z surowców i materiałów budowlanych. Jeżeli normy promieniowania nie zostały przekroczone, nie ma obawy przed szkodliwym działaniem pierwiastków promieniotwórczych. Ponad to, uważa się iż całkowity brak promieniowania jest niekorzystny, gdyż może spowodować lawinowy rozwój drobnoustrojów.
Ionizing radiation is a factor which severely allows to characterize the human environment and hygienic conditions -health, prevailing in buildings intended for human residence. For organisms play two important factors: - background radiation affecting living organisms - alpha radiation decay products of radon affecting the respiratory system. The presence of radon and its derivatives in the areas of residential buildings s may have come primarily from the soil of raw materials and construction materials. If the radiation standards are not exceeded, there is no fear of the harmful effects of radioactive elements. More than that, it is believed that the total absence of radiation is disadvantageous because it can cause an avalanche microbial growth.

Źródło:

Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Technika, Informatyka, Inżynieria Bezpieczeństwa; 2015, T. 3; 113-129
2300-5343

Pojawia się w:

Prace Naukowe Akademii im. Jana Długosza w Częstochowie. Technika, Informatyka, Inżynieria Bezpieczeństwa

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 49.

Tytuł:

Gamma-radiation-induced ATM-dependent signalling in human T-lymphocyte leukemic cells, MOLT-4

Autorzy:

Tichý, Aleš
Záškodová, Darina
Řezáčová, Martina
Vávrová, Jiřina
Vokurková, Doris
Pejchal, Jaroslav
Vilasová, Zdena
Cerman, Jaroslav
Österreicher, Jan

Powiązania:

https://bibliotekanauki.pl/articles/1041075.pdf

Data publikacji:

2007

Wydawca:

Polskie Towarzystwo Biochemiczne

Tematy:

checkpoint kinase-2
ionizing radiation
p53
ATM kinase
Mdm2

Opis:

ATM kinase (ATM) is essential for activation of cell cycle check points and DNA repair in response to ionizing radiation (IR). In this work we studied the molecular mechanisms regulating DNA repair and cell death in human T-lymphocyte leukemic cells, MOLT-4. Apoptosis was evaluated by flow-cytometric detection of annexin V. Early apoptotic cells were determined as sub-G1 cells and late apoptotic cells were determined as APO2.7-positive ones. Proteins involved in ATM signalling pathway were analysed by Western-blotting. We observed a rapid (0.5 h) phosphorylation of ATM declining after 6 h after irradiation by all the doses studied (1.5, 3.0, and 7.5 Gy). Checkpoint kinase-2 (Chk-2) was also phosphorylated after 0.5 h but its phosphorylated form persisted 4, 2, and 1 h after the doses of 1.5, 3.0, and 7.5 Gy, respectively. The amount of p53 protein and its form phosphorylated on Ser-392 increased 1 h after irradiation (1-10 Gy). The lethal dose of 7.5 Gy caused an immediate induction and phosphorylation of p53 after 0.5 h post-irradiation. At the time of phosphorylation of p53, we found simultaneous phosphorylation of the oncoprotein Mdm2 on Ser-166. Neither ATM nor its downstream targets showed a dose-dependent response after 1 h when irradiated by the doses of 1-10 Gy. MOLT-4 cells were very sensitive to the effect of IR. Even low doses, such as 1.5 Gy, induced apoptosis 16 h after irradiation (evaluated according to the cleavage of nuclear lamin B to a 48-kDa fragment). IR-induced molecular signalling after exposure to all the tested doses was triggered by rapid phosphorylation of ATM and Chk-2. Subsequent induction of p53 protein and its phosphorylation was accompanied by concomitant phosphorylation of its negative regulator, oncoprotein Mdm2, and followed by induction of apoptosis.

Źródło:

Acta Biochimica Polonica; 2007, 54, 2; 281-287
0001-527X

Pojawia się w:

Acta Biochimica Polonica

Dostawca treści:

Biblioteka Nauki

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Skocz do pozycji: 50.

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

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