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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Rocz Panstw Zakl Hig · Jan 1991
Comparative Study[Changes in psychophysical load of high school students as a result of educational reform].
The material comprised 2679 secondary school pupils (1959 girls and 1020 boys) from several Polish big cities, among whom 1281 pupils took up the old school program and 1968--the new program. The present studies were initiated in school year 1985/86 and were completed in 1989/1990. The psychophysical load of pupils was evaluated by means of a standard questionnaire comprising 77 questions grouped into problems, allowing us to determine the pupil's psychophysical load associated with school education, extra school occupations, daily time-table, situation in the class and family as well as psychic general feeling. ⋯ After the educational reform, the load was heaviest in the second class of secondary school. The psychophysical load of girls exceeded that of boys. Likewise, the loads associated with the objectively prevailing load-causing situations as well as those associated with subjective feeling of the burden of these loads were heavier in girls than in boys, both before and after the introduction of changes in school programs.