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Zygmunt Machoy Elzbieta Dabkowska Wanda Nowicka 《Environmental geochemistry and health》1991,13(3):161-163
Fluorine is a microelement appearing in soil, water and living organisms. Higher fluorine concentration exerts a negative effect on the course of metabolic processes, mainly in the bones. The studies performed have shown that in areas polluted by industrial emissions the fluoride level in bones of animals rises, but fails to reach concentrations characteristic of the disease called bone fluorosis. The results presented illustrate the quantity being reached by fluoride accumulation in the bones of animals from areas polluted by industrial emissions. 相似文献
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Nowicka Beatrycze 《Environmental science and pollution research international》2022,29(12):16860-16911
Environmental Science and Pollution Research - Heavy metals is a collective term describing metals and metalloids with a density higher than 5 g/cm3. Some of them are essential... 相似文献
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Designing a proper acoustical environment--indispensable to speech recognition--in long enclosures is difficult. Although there is some literature on the acoustical conditions in underground stations, there is still little information about methods that make estimation of correct reverberation conditions possible. This paper discusses the assessment of the reverberation conditions of underground stations. A comparison of the measurements of reverberation time in Warsaw's underground stations with calculated data proves there are divergences between measured and calculated early decay time values, especially for long source-receiver distances. Rapid speech transmission index values for measured stations are also presented. 相似文献
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Several factors such as smoking habits, diet, occupational, and environmental exposure to chemical carcinogens influence the overall level of DNA damage. In 69 healthy adult volunteers’ polymorphisms of glutathione S-transferase (GST), an enzyme which participates in the metabolism of a broad range of carcinogens and endogenous compounds were determined. The level of DNA damage was assessed by comet assay and classified according to GSTT1/M1 genotype and smoking habits. GSTM1 null genotype was recognized in 48% of studied subjects and GSTT1 null genotype in only two cases (3%). In subjects carrying GSTT1/M1 alleles a significantly lower degree of DNA damage, determined as % DNA in the comet's tail, than in null individuals was noted. However, the results obtained did not indicate that in studied subjects an elevated endogenous level of DNA damage may be significantly related to smoking habits. 相似文献
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Designing a proper acoustical environment—indispensable to speech recognition—in long enclosures is difficult. Although there is some literature on the acoustical conditions in underground stations, there is still little information about methods that make estimation of correct reverberation conditions possible. This paper discusses the assessment of the reverberation conditions of underground stations. A comparison of the measurements of reverberation time in Warsaw’s underground stations with calculated data proves there are divergences between measured and calculated early decay time values, especially for long source–receiver distances. Rapid speech transmission index values for measured stations are also presented. 相似文献
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