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Wyświetlanie 1-4 z 4
Tytuł:
Letter to editor
Autorzy:
Cassini, Carina
Calloni, Caroline
Bortolini, Giovana
Garcia, Solange C.
Dornelles, Marco A.
Henriques, João A.
Erdtmann, Bernardo
Salvador, Mirian
Powiązania:
https://bibliotekanauki.pl/articles/2180095.pdf
Data publikacji:
2012-06-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2012, 25, 3; 314-315
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Pressure drop of filtering facepiece respirators: How low should we go?
Autorzy:
Kim, Jung-Hyun
Roberge, Raymond J.
Powell, Jeffrey B.
Shaffer, Ronald E.
Ylitalo, Caroline M.
Sebastian, John M.
Powiązania:
https://bibliotekanauki.pl/articles/2177016.pdf
Data publikacji:
2015-02-24
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
respirator
filter
oral breathing
nasal breathing
Opis:
Introduction This study was undertaken to determine the mean peak filter resistance to airflow (R filter) encountered by subjects while wearing prototype filtering facepiece respirators (PRs) with low Rfilter during nasal and oral breathing at sedentary and low-moderate work rates. Material and methods In-line pressure transducer measurements of mean R filter across PRs with nominal R filter of 29.4 Pa, 58.8 Pa and 88.2 Pa (measured at 85 l/min constant airflow) were obtained during nasal and oral breathing at sedentary and low-moderate work rates for 10 subjects. Results The mean R filter for the 29.4 PR was significantly lower than the other 2 PRs (p < 0.000), but there were no significant differences in mean R filter between the PRs with 58.8 and 88.2 Pa filter resistance (p > 0.05). The mean R filter was greater for oral versus nasal breathing and for exercise compared to sedentary activity (p < 0.001). Conclusions Mean oral and nasal R filter for all 3 PRs was at, or below, the minimal threshold level for detection of inspiratory resistance (the 58.8–74.5 Pa/l×s⁻¹), which may account for the previously-reported lack of significant subjective or physiological differences when wearing PRs with these low R filter. Lowering filtering facepiece respirator R filter below 88.2 Pa (measured at 85 l/min constant airflow) may not result in additional subjective or physiological benefit to the wearer.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2015, 28, 1; 71-80
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Occupational risk assessment of oxidative stress and genotoxicity in workers exposed to paints during a working week
Autorzy:
Cassini, Carina
Calloni, Caroline
Bortolini, Giovana
Garcia, Solange C.
Dornelles, Marco A.
Henriques, João A.
Erdtmann, Bernardo
Salvador, Mirian
Powiązania:
https://bibliotekanauki.pl/articles/2185389.pdf
Data publikacji:
2011-09-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
paint exposure
Oxidative stress
genotoxicity
Opis:
Objectives: Paints are complex mixtures of solvents and metals that can induce health damages in workers exposed to them. The aim of the present work was to evaluate possible oxidative and genotoxic effects in workers exposed to paints. Material and Methods: Peripheral blood and buccal cell samples were collected from 33 workers exposed to paints and 29 non-exposed workers (controls) during an ordinary working week (Monday morning and Friday evening). Oxidative markers were assessed using thiobarbituric acid assay, carbonylated proteins, superoxide dismutase and catalase activities. Hippuric acid and delta-aminolevulinic acid were determined as biomarkers of toluene and lead exposure, respectively. Genotoxicity was measured through comet assay and micronucleus (MN) frequencies. Results: The exposed group showed higher hippuric acid and delta-aminolevulinic acid levels (Friday samples) and lower superoxide dismutase activity (Monday samples) in relation to control group. DNA damage index (comet assay) was higher in the exposed group, both in Monday and Friday samples, compared to the control group. No differences were observed in frequency of micronuclei (MN) between the groups, either in lymphocytes or buccal cells. However, the exposed group presented an increase (Monday samples) in nuclear buds frequency in lymphocytes — a marker of gene amplification — as well as an increase in condensed chromatin in the buccal cells (Monday and Friday samples), suggesting induction of apoptosis. Furthermore, a decrease in the nuclear division index (Friday samples) was observed in the exposed group, indicating that paint exposure induces cytostatic effects in lymphocytes. Conclusion: The results suggest that individuals exposed to paints have increased levels of DNA damage.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2011, 24, 3; 308-319
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Occupational exposure to trichloroethylene and cancer risk for workers at the Paducah Gaseous Diffusion Plant
Autorzy:
Bahr, Debra E.
Aldrich, Timothy E.
Seidu, Dazar
Brion, Gail M.
Tollerud, David J.
Muldoon, Susan
Reinhart, Nancy
Youseefagha, Ahmed
McKinney, Paul
Hughes, Therese
Chan, Caroline
Rice, Carol
Brewer, David E.
Freyberg, Ronald W.
Mohlenkamp, Adriane M.
Hahn, Kristen
Hornung, Richard
Ho, Mona
Dastidar, Aniruddha
Freitas, Samantha
Saman, Daniel
Ravdal, Hege
Scutchfield, Douglas
Powiązania:
https://bibliotekanauki.pl/articles/2185472.pdf
Data publikacji:
2011-03-01
Wydawca:
Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
Tematy:
cohort study
gaseous diffusion plant
trichloroethylene
Healthy Worker Effect
Opis:
Objective: The Paducah Gaseous Diffusion Plant (PGDP) became operational in 1952; it is located in the western part of Kentucky. We conducted a mortality study for adverse health effects that workers may have suffered while working at the plant, including exposures to chemicals. Materials and Methods: We studied a cohort of 6820 workers at the PGDP for the period 1953 to 2003; there were a total of 1672 deaths to cohort members. Trichloroethylene (TCE) is a specific concern for this workforce; exposure to TCE occurred primarily in departments that clean the process equipment. The Life Table Analysis System (LTAS) program developed by NIOSH was used to calculate the standardized mortality ratios for the worker cohort and standardized rate ratio relative to exposure to TCE (the U.S. population is the referent for ageadjustment). LTAS calculated a significantly low overall SMR for these workers of 0.76 (95% CI: 0.72–0.79). A further review of three major cancers of interest to Kentucky produced significantly low SMR for trachea, bronchus, lung cancer (0.75, 95% CI: 0.72–0.79) and high SMR for Non-Hodgkin’s lymphoma (NHL) (1.49, 95% CI: 1.02–2.10). Results: No significant SMR was observed for leukemia and no significant SRRs were observed for any disease. Both the leukemia and lung cancer results were examined and determined to reflect regional mortality patterns. However, the Non-Hodgkin’s Lymphoma finding suggests a curious amplification when living cases are included with the mortality experience. Conclusions: Further examination is recommended of this recurrent finding from all three U.S. Gaseous Diffusion plants.
Źródło:
International Journal of Occupational Medicine and Environmental Health; 2011, 24, 1; 67-77
1232-1087
1896-494X
Pojawia się w:
International Journal of Occupational Medicine and Environmental Health
Dostawca treści:
Biblioteka Nauki
Artykuł
    Wyświetlanie 1-4 z 4

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