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This study was carried out in a car factory at workplaces in various states of activity. The measurements of substances enlisted as carcinogenic found at workplaces in some departments in 1995-1997 was carried out as well as the evaluation of microclimatic conditions and the evaluation of sick absenteism in the whole factory. Analysis of results revealed that microclimates in the rooms in the studied departments did not exceed permissible hygienic standards, except for some workplaces in the suspension springs department and the tool room. The analysis of exposure to particular/specific factors in 1995-1997 enlisted among carcinogenic substances did not reveal any toxicological health hazard. Sick absenteism in the whole factory and studied departments in the analyzed period varied. The prevailing group of diseases were diseases of the respiratory system. Morbidity from cancer was low.
We hypothesise that inhalant exposure to mycotoxins causes developmental outcomes and certain hormone-related cancers that are associated with grain farming in an epidemiological study. The aim of the present study was to identify and validate determinants of measured trichothecene mycotoxins in grain dust as work environmental trichothecene exposure indicators. Settled grain dust was collected in 92 Norwegian farms during seasons of 1999 and 2000. Production characteristics and climatic data were studied as determinants of trichothecenes in settled dust samples obtained during the production of barley (N = 59), oats (N = 32), and spring wheat (N = 13). Median concentrations of trichothecenes in grain dust were <20, 54, and <50 mg/kg (ranges <20-340, <30-2400, and <50-1200) for deoxynivalenol (DON), HT-2 toxin (HT-2) and T-2 toxin (T-2) respectively. Late blight potato rot (fungal) forecasts have been broadcast in Norway to help prevent this potato disease. Fungal forecasts representing wet, temperate, and humid meteorological conditions were identified as strong determinants of trichothecene mycotoxins in settled grain dust in this study. Differences in cereal species, production properties and districts contributed less to explain mycotoxin concentrations. Fungal forecasts are validated as indicators of mycotoxin exposure of grain farmers and their use in epidemiological studies may be warranted.
Working time in conditions of exposure to hazardous factors is an important element indispensable for the evaluation of human exposure in the working environment. Agricultural work is accompanied by co-occurrence of many risk factors threatening farmers' health, e.g. dust, elements of the thermal environment, noise, vibration, chemical and biological agents. Biological factors cause diseases with contagious, allergic or immuno-toxic backgrounds which constitute the majority of farmers' occupational diseases registered in Poland. Exposure to hazardous factors in agricultural working environment is due to contact with plants, animals and organic wastes, more precisely - with microbes, plant and animal particles present in aerogenic agricultural dust, as well as pathogens of contagious and invasive diseases present in contaminated soil, water and plants. Data concerning the duration of farmers' exposure to biological and other factors of the working environment were obtained with the use of the Private Farmer Work Chart. Time-schedule observations concerned an annual work cycle. The study covered 30 farms with the following production profiles: plant (Group A), animal (Group B) and mixed production (Group C). The total working time was: in Group A - from 106-163% of the legal working time; in Group B - from 75-147%; in Group C - from 136-167%. Among 48 work activities contributing to the full working cycle among the farmers examined, 15 activities were accompanied by 5 factors. These were mainly field activities which covered plant harvesting and fertilizing, chemical plant protection, as well as cultivation activities. Agricultural dust and elements of the thermal environment were the environmental factors most frequently accompanying agricultural work, followed by contact with biological factors, noise, vibration, and chemical agents. Biological factors are a specific element associated with 19 work activities, mainly the spreading of manure, animal breeding and plant harvesting. Farmers' working time in conditions of exposure to these factors in the group of plant producers was 51% of the total working time on average, among animal breeders - 80% and in the case of mixed production - 77%.
Skidding logs from stump to landing areas is one of the most important procedures in ground-based logging operations. Rubber-tired skidders often increase soil compaction, which leads to an increase in soil strength (penetrometer resistance) and bulk density (dry soil weight per volume). Woody slash materials (tree limbs and tops) are generally distributed over the skid trails to reduce soil compaction due to machine traffic. In this study, soil compaction was estimated by measuring the values of soil strength and bulk density resulting from a rubber-tired skidder. The effects of not only woody slash materials but also various other slash treatments (chip and sawdust) in reducing soil compaction were investigated by considering the various numbers of vehicle trips (1, 5, and 10 trips) and two soil depth classes (10 and 20 cm depths). The results indicated that soil compaction indicators, soil strength and bulk density, markedly increased as the number of machine trips increased. Woody slash materials distributed over the skid trail provided better soil support capacity than that of other slash treatments. It was also found that there was a significant correlation between soil strength and bulk density with respect to the number of machine trips and slash treatments.
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