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Tytuł:
Technologically enhanced naturally occurring radioactive materials in the oil industry (TENORM).
Autorzy:
Bou-Rabee, F.
Al-Zamel, A. Z.
Al-Fares, R. A.
Bem, H.
Powiązania:
https://bibliotekanauki.pl/articles/146466.pdf
Data publikacji:
2009
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
oil industry
radiation exposure
radionuclides
Opis:
A large amount of naturally occurring radioactive materials in the form of by-products or waste is produced annually by the growing activity of the oil and gas industry. Solid scale, sludge and produced water are typical residues contaminated with natural radionuclides from the uranium and thorium series, particularly 226Ra and 228Ra. The observed specific activities of these radionuclides are in the ranges up to 3700 kBq/kg and up to 168 kBq/kg for solid scale and sludge, respectively. The average activities of both radionuclides exceed the exemption level of 10,000 Bq/kg recommended by IAEA safety standards. This means that TENORM wastes from the oil industry may generate radiation exposure levels which require attention and continuous monitoring during some routine operations in this industry. This exposure is mostly caused by external gamma radiation coming from the 226Ra radionuclide and its progenies.
Źródło:
Nukleonika; 2009, 54, 1; 3-9
0029-5922
1508-5791
Pojawia się w:
Nukleonika
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
A cytogenetic approach to the effects of low levels of ionizing radiation (IR) on the exposed Tunisian hospital workers
Autorzy:
Bouraoui, Sana
Mougou, Soumaya
Drira, Afef
Tabka, Faten
Bouali, Nouha
Mrizek, Najib
Elghezal, Hatem
Saad, Ali
Powiązania:
https://bibliotekanauki.pl/articles/2179799.pdf
Data publikacji:
2013-03-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
centromere-micronucleus assay
occupational radiation exposure
hospital workers
centromere negative micronuculei
Opis:
Objectives: The aim of this study is to assess chromosomal damage in Tunisian hospital workers occupationally exposed to low levels of ionizing radiation (IR). Materials and Methods: The cytokinesis-block micronucleus (CBMN) assay in the peripheral lymphocytes of 67 exposed workers compared to 43 controls matched for gender, age and smoking habits was used. The clastogenic/aneugenic effect of IR was evaluated using the CBMN assay in combination with fluorescence in situ hybridization with human pan-centromeric DNA in all the exposed subjects and controls. Results: The study showed a signifi cant increase of the micronucleus (MN) frequency in the lymphocytes of the exposed workers compared to the control group (13.63±4.9‰ vs. 6.52±4.21‰, p < 0.05). The centromere analysis performed in our study showed that MNs in hospital staff were predominantly centromere negative (72%) and the mean negative labeled micronucleus (C–MN) frequency was signifi cantly higher in the exposed subjects than in the controls (9.04±4.57‰ vs. 1.17±0.77‰). The multivariate regression analysis, taking into account all confounding factors, showed that only the time of exposure to IR had a signifi cant effect on the level of MNs and C–MN. Conclusion: The present study shows that chromosomal damage leading to the formation of micronucleated lymphocytes is more frequent in the hospital workers exposed to IR than in the controls, despite the low levels of exposure. The results of the study confi rm the well-known clastogenic properties of ionizing radiation. In regards to health monitoring, detection of early genotoxic effects may allow for the adoption of preventive biological control measures, such as hygienic improvements in the workplace or reduction of hours of occupational exposure.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2013, 26, 1; 144-154
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
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:
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:
Minimum exposure path in an enclosure of randomly placed radioactive sources
Autorzy:
Aljohani, M.
Powiązania:
https://bibliotekanauki.pl/articles/148350.pdf
Data publikacji:
2003
Wydawca:
Instytut Chemii i Techniki Jądrowej
Tematy:
radiation protection
exposure minimization
Opis:
In this paper, two models to establish the minimum exposure path in a randomly placed radioactive sources enclosure are developed. The first model establishes the minimum exposure rate path and the second establishes the normal, to the inlet and outlet surfaces, path that gives a minimum exposure. The path that gives the least exposure is chosen. Although the point kernel technique is utilized and the enclosure is assumed rectangular with randomly placed radioactive point sources, the two models are independent techniques and can be easily incorporated with deterministic and statistical methods as well as other types of enclosures and source geometries.
Źródło:
Nukleonika; 2003, 48, 4; 201-205
0029-5922
1508-5791
Pojawia się w:
Nukleonika
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:
Multiple assessment methods of prenatal exposure to radio frequency radiation from telecommunication in the Mothers and Children’s Environmental Health (MOCEH) study
Autorzy:
Choi, Kyung-Hwa
Ha, Mina
Burm, Eunae
Ha, Eun-Hee
Park, Hyesook
Kim, Yangho
Lee, Ae-Kyoung
Kwon, Jong Hwa
Choi, Hyung-Do
Kim, Nam
Powiązania:
https://bibliotekanauki.pl/articles/2168386.pdf
Data publikacji:
2016-11-18
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
prenatal exposure
validation
mobile phone
radio frequency radiation
MOCEH
personal exposure meter
Opis:
Objectives To evaluate prenatal exposure to radiofrequency radiation (RFR) from telecommunication using a mobile phone questionnaire, operator data logs of mobile phone use and a personal exposure meter (PEM). Material and Methods The study included 1228 mother–infants pairs from the Mothers and Children’s Environmental Health (MOCEH) study – a multicenter prospective cohort study ongoing since 2006, in which participants were enrolled at ≤ 20 weeks of pregnancy, with a follow-up of a child birth and growth to assess the association between prenatal environmental exposure and children’s health. The questionnaire included the average calling frequency per day and the average calling time per day. An EME Spy 100 PEM was used to measure RFR among 269 pregnant women from November 2007 to August 2010. The operators’ log data were obtained from 21 participants. The Spearman’s correlation test was performed to evaluate correlation coefficient and 95% confidence intervals between the mobile phone use information from the questionnaire, operators’ log data, and data recorded by the PEM. Results The operators’ log data and information from the self-reported questionnaire showed significantly high correlations in the average calling frequency per day (ρ = 0.6, p = 0.004) and average calling time per day (ρ = 0.5, p = 0.02). The correlation between information on the mobile phone use in the self-reported questionnaire and exposure index recorded by the PEM was poor. But correlation between the information of the operators’ log data and exposure index for transmission of mobile communication was significantly high: correlation coefficient (p-value) was 0.44 (0.07) for calling frequency per day, and it was 0.49 (0.04) for calling time per day. Conclusions The questionnaire information on the mobile phone use showed moderate to high quality. Using multiple methods for exposure assessment might be better than using only one method. Int J Occup Med Environ Health 2016;29(6):959–972
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2016, 29, 6; 959-972
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Outdoor work and solar radiation exposure: Evaluation method for epidemiological studies
Praca na wolnym powietrzu a narażenie na promieniowanie słoneczne – metoda oceny do stosowania w badaniach epidemiologicznych
Autorzy:
Modenese, Alberto
Bisegna, Fabio
Borra, Massimo
Grandi, Carlo
Gugliermetti, Franco
Militello, Andrea
Gobba, Fabriziomaria
Powiązania:
https://bibliotekanauki.pl/articles/2164265.pdf
Data publikacji:
2016-10-17
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
narażenie zawodowe
promieniowanie optyczne
praca na wolnym powietrzu
ocena narażenia
promieniowanie słoneczne
promieniowanie ultrafioletowe
occupational exposure
optical radiation
outdoor work
exposure assessment
solar radiation
ultraviolet radiation
Opis:
Background The health risk related to an excessive exposure to solar radiation (SR) is well known. The Sun represents the main exposure source for all the frequency bands of optical radiation, that is the part of the electromagnetic spectrum ranging between 100 nm and 1 mm, including infrared (IR), ultraviolet (UV) and visible radiation. According to recent studies, outdoor workers have a relevant exposure to SR but few studies available in scientific literature have attempted to retrace a detailed history of individual exposure. Material and Methods We propose a new method for the evaluation of SR cumulative exposure both during work and leisure time, integrating subjective and objective data. The former is collected by means of an interviewer administrated questionnaire. The latter is available through the Internet databases for many geographical regions and through individual exposure measurements. The data is integrated into a mathematical algorithm, in order to obtain an esteem of the individual total amount of SR the subjects have been exposed to during their lives. Results The questionnaire has been tested for 58 voluntary subjects. Environmental exposure data through online databases has been collected for 3 different places in Italy in 2012. Individual exposure by electronic UV dosimeter has been measured in 6 fishermen. A mathematical algorithm integrating subjective and objective data has been elaborated. Conclusions The method proposed may be used in epidemiological studies to evaluate specific correlations with biological effects of SR and to weigh the role of the personal and environmental factors that may increase or reduce SR exposure. Med Pr 2016;67(5):577–587
Wstęp Ryzyko zdrowotne związane z nadmiernym narażeniem na promieniowanie słoneczne (solar radiation – SR) jest dobrze znane. Słońce stanowi główne źródło promieniowania optycznego wszystkich zakresów częstotliwości, które obejmuje część widma elektromagnetycznego w zakresie od 100 nm do 1 mm, w tym podczerwień (infrared – IR), ultrafiolet (ultraviolet – UV) i promieniowanie widzialne. Według najnowszych badań osoby pracujące na wolnym powietrzu mogą być znacznie narażone na promieniowanie słoneczne, ale w niewielu badaniach odtworzono szczegółową historię indywidualnej ekspozycji. Materiał i metody W artykule zaproponowano nową metodę oceny skumulowanego narażenia na SR podczas pracy i w czasie wolnym, uwzględniającą dane subiektywne i obiektywne. Pierwsze z nich są zbierane w wywiadzie, drugie można uzyskać z baz internetowych dla regionów geograficznych i poprzez indywidualne pomiary narażenia. Dane są łączone za pomocą algorytmu matematycznego w celu uzyskania wartości indywidualnego całkowitego narażenia na SR badanych osób w trakcie ich całego życia. Wyniki Kwestionariusz przetestowano wśród 58 ochotników. Dane dotyczące narażenia na SR w 3 różnych miejscach we Włoszech w 2012 r. uzyskano z internetowych baz danych. Pomiar indywidualnego narażenia na SR u 6 rybaków wykonano elektronicznym dozymetrem UV. Opracowano również matematyczny algorytm scalania danych subiektywnych i obiektywnych. Wnioski Proponowana metoda może być stosowana w badaniach epidemiologicznych do określenia zależności między efektami biologicznymi a narażeniem na promieniowanie słoneczne oraz do oceny roli czynników osobniczych i środowiskowych, które mogą zwiększać lub zmniejszać narażenie na promieniowanie słoneczne. Med. Pr. 2016;67(5):577–587
Źródło:
Medycyna Pracy; 2016, 67, 5; 577-587
0465-5893
2353-1339
Pojawia się w:
Medycyna Pracy
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:
Relations between excretion of indole melanogen (TPM) and time of exposure to solar radiation
Autorzy:
Kubinski, Z.
Kwapulinski, J.
Brewczynski, P.
Roczniak, W.
Kowol, J.
Cipora, E.
Babuska-Roczniak, M.
Powiązania:
https://bibliotekanauki.pl/articles/3160.pdf
Data publikacji:
2015
Wydawca:
Instytut Medycyny Wsi
Tematy:
relation
excretion
melanogenesis
exposure time
solar radiation
skin
pigmentation
Opis:
Introduction. In the human skin exposed to ultraviolet (UV) radiation, melanogenesis occurs in two stages, accompanied by urinary excretion of Thormalen-positive melanogen (TPM). In Poland, no data are available on the course and intensity of melanogonesis in relation to UV exposure in an industrial region. Material and methods. The Thormalen test was used for the collected samples (N=136) as modified by Matous and Suchoń. Results. Maximum environmental TPM content (0.67 μg/dm3) was observed in August. Conclusion. The time of UV exposure and local type of solar radiation promote melanogenesis.
Źródło:
Journal of Pre-Clinical and Clinical Research; 2015, 09, 2
1898-2395
Pojawia się w:
Journal of Pre-Clinical and Clinical Research
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:
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:
Method of determining photobiological safety of contemporary light sources
Autorzy:
Pawlak, A.
Powiązania:
https://bibliotekanauki.pl/articles/134950.pdf
Data publikacji:
2015
Wydawca:
Akademia Morska w Szczecinie. Wydawnictwo AMSz
Tematy:
photobiological hazard
ultraviolet radiation
infrared radiation
visible radiation
blue light hazard
risk group
safe exposure time
lighting source
light emitting diode (LED)
Opis:
The article presents a method of evaluating irradiance, spectral irradiance, and spectral radiance, for purposes of determining risk groups of sources of light. The description of the method of measurement of radiance incorporates standard and alternative methods. Measurement methods were developed on the basis of general requirements and diagrams incorporated in the standard PN-EN 62471: 2010. The paper classifies risk groups of sources of light in terms of photobiological hazards and exposure limits when skin is at risk of being damaged by visible and infrared radiation. Threshold values of emissions for the continuous sources of radiation studied are presented. The article describes environmental conditions under which the measurements are to be taken, and requirements applicable to the process of light source aging. In addition, technical assumptions are presented, and the design of the test stand for measuring optical radiation parameters is described.
Źródło:
Zeszyty Naukowe Akademii Morskiej w Szczecinie; 2015, 43 (115); 29-36
1733-8670
2392-0378
Pojawia się w:
Zeszyty Naukowe Akademii Morskiej w Szczecinie
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:
Infl uence of an Increased Controlled Dose of Irradiance on the Change of Selected Physicochemical Properties of Paint Systems Used in Rolling Stock
Autorzy:
Garbacz, Marcin
Powiązania:
https://bibliotekanauki.pl/articles/2203230.pdf
Data publikacji:
2022
Wydawca:
Instytut Kolejnictwa
Tematy:
accelerated weathering
xenon-arc radiation
paint coatings
irradiance
radiant exposure
hardness
gloss
colour
rolling stock
Opis:
The article presents the results of ageing tests with the use of laboratory light radiation tested according to the EN ISO 16474-2 standard for painting systems used in rolling stock. Th e influence of aging on such properties as gloss, colour and hardness, was determined using two different irradiance settings of the order of 60 W/m2 and 120 W/m2 for the wavelength 300÷400 nm and the same levels of radiant exposure. In addition, this study describes the most important information about laboratory aging tests with simulation of sunlight, temperature, moisture including rain, which are included in ISO standardised test methods. The influence of weather parameters has been described, in particular the influence of an increased dose of irradiance on the degradation of selected physicochemical properties of coatings and the possibility of the predicted ageing progress (changes in selected properties). The obtained results of laboratory tests allow to make certain assumptions regarding the increase of the dose of irradiance and thus the shortening of the laboratory testing time in the context of the assessment of the most desirable properties of the coating for a given application with the use of laboratory ageing tests.
Źródło:
Problemy Kolejnictwa; 2022, 197; 99--115
0552-2145
2544-9451
Pojawia się w:
Problemy Kolejnictwa
Dostawca treści:
Biblioteka Nauki
Artykuł
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