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Szary ML Chugh YP Hirschi J 《International journal of occupational safety and ergonomics》2011,17(3):301-308
Noise in an underground coal mine has dominant components generated mainly from 3 sources: (a) continuous mining machines, (b) roof bolters, and (c) cars/vehicles used to transport personnel and/or coal. Each of these 3 noise sources also has a number of well-defined sub-sources with their own noise characteristics. Sound level meters were used to collect noise data in the form of instantaneous readings and also to check calibration of other sound measuring instruments. The most useful information was obtained from a spectrum analysis of continuous digital recordings of noise over time. This paper discusses the variability or dynamics of generated noise in both frequency and time domains in relation to several independent variables related to coal extraction and transportation processes. 相似文献
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Chugh Priya Kaur Jaspreet Soni Raman Sharma Apurav Soni Sanjeev Kumar 《Journal of Material Cycles and Waste Management》2023,25(1):359-375
Journal of Material Cycles and Waste Management - The study deals with the management of deoiled rice bran by converting it into ethanol using a multi-enzyme preparation produced in-house... 相似文献
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Effect of cadmium on germination, amylases and rate of respiration of germinating pea seeds 总被引:10,自引:0,他引:10
Growth of embryonic axis of germinating pea seeds (Pisum sativum cv. Bonneville) was significantly inhibited by as low as 0.25 mM cadmium and the elongation of the radicle was affected more severely than that of the plumule. Total amylolytic activity, as well as activities of alpha- and beta-amylases, diminished progressively with increasing concentrations of the metal in the media. The deleterious effect on alpha-amylase persisted throughout, whereas beta-amylase activity recovered with time. The rate of respiration of seeds, measured by oxygen uptake, was markedly impeded by cadmium and the phase of rapid and linear development of respiratory activity (after 3 days of imbibition) was almost completely, suppressed in the presence of higher concentrations (1 mM) of the metal. The observed impact of cadmium on starch mobilization and on respiratory activity are discussed in relation to its adverse effects on seed germination. 相似文献
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