Roczniki Państwowego Zakładu Higieny
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Rocz Panstw Zakl Hig · Jan 1991
Comparative Study[Study of penetration to surface waters of pesticides used for protection of greenhouse plants].
Study was made of waste waters from two of the seven state horticultural farms producing vegetables and flowers, located in South-Eastern Poland, samples were taken from collectors carrying waste waters from the greenhouse culture surface, from a ditch and from the Wisłok River where these waste waters are carried. Pesticides were extracted with dichloromethane or petroleum ether. ⋯ These pesticides were present also in water samples collected from aditch into which waste waters from one of the investigated state farms are carried. There were no pesticides in samples of the Wisłok River waters.
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Selenium belongs to the group of elements which may be regarded as useful only in a very narrow range, while in excess doses they exert a harmful action. The content of the element in soil is usually from 0.1 to 2 mg/kg, with the Scandinavian soils have a low level of selenium, not exceeding 0.3 mg/kg. The highest level, exceeding 3000 mg/kg was noted in Northern Ireland. ⋯ The toxic effects of selenium in the environment include inflammatory processes of the extremities in herbivorous animals (the so called Degnal disease in India and the Alkali disease in Great Britain). Selenium deficiency in the environment leads to the so called white muscle disease in these animals in Great Britain. Selenium is considered also to protect the organism in case of poisoning with lead, mercury or cadmium.
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Rocz Panstw Zakl Hig · Jan 1989
Comparative Study[Changes in sanitary conditions at elementary schools in Poland 1985-1988].
In the years 1985 and 1988 using a scoring system the health conditions were evaluated in a representative sample of 448 elementary schools in Poland for determining the changes occurring in them during that time. The evaluation included the environment, school building, school functioning and education organization. The study demonstrated unsatisfactory health conditions, especially in village schools, due mainly to poor lighting of schools, poor equipment with furniture, toilet facilities, conditions of feeding, and recreational facilities. During three years this situation was slightly improved, but is still far from satisfactory.