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Biomedical subjects

N A Zaĭtsev

Publications and source records attributed to N A Zaĭtsev.

16 recordsLinked to original sources
PubMed1990

[Health-related regulation of diethyl phthalate, di-n-hexyl phthalate and dialkyl phthalate 810 in water].

On the basis of studies of hygienic regulation of diethylphthalate (DEP), di-n-hexylphthalate (DHP) and dialkylphthalate-810 (DAP-810) in the water medium) it has been found out that the compounds are highly persistent in the water medium, are of low toxicity (LD50 from 10.3 up to 33 g/kg and more for white rats), belong to the third and fourth (DHP and DAP-810) classes of danger. The threshold concentrations of DEP, DHP, DAP-810 according to the organoleptic water properties and sanitary regimen of water reservoirs were determined on the level of 1, 0.46, 0.3 and 0.1, 1, and 1 mg/l respectively. DEP has moderately expressed cumulative properties while in DHP and DAP-810 they are clearly expressed. No specific effect was observed in the compounds. MACs for DEP, DHP and DAP-810 in the water medium are recommended on the level of 0.1, 0.5 and 0.3 mg/l according to the general toxic and organoleptic indices of harmfulness.

Animals↗
PubMedDate not supplied

[Methodological aspects of hygienic evaluation of small-sized plants safety for biological purification of household waste waters].

The paper deals with the studies of the efficiency of four small-sized plants for biological purification of household waste waters (WW), which were conducted by using a complex of sanitary criteria, such as organoleptic, sanitary-and-chemical and sanitary-and-microbiological parameters of water quality of water objects, such as purified WW reservoirs, and presents a comparative assessment of their efficiency. The used methodological scheme is shown to provide an objective evaluation of the sanitary efficiency of the equipment under test with an compulsory set of regulated and additional integral parameters that should be regarded in combination. It is recommended that preference should be given to WW purification technologies that are effective in removing the environmentally hazardous chemical substances used in household chemistry.

Fresh Water↗