| [a hygienic study of new raw materials for cosmetic agents and household chemical preparations]. | studies are performed on the new bulgarian raw materials "aminookis" (ao) and "dezodorirashch agent" (da) the plants "alen mak"--plovdiv and "hyaluron"--sofia. chemical, toxicological and microbiological studies are carried out. thin-layer chromatographic and spectrophotometric methods for determination of ao, hyaluronic acid and da are developed and chemical studies on cosmetics, prepared with them, are carried out. during the repetition of a 21-day experiment on guinea pigs the threshold irrit ... | 1990 | 2099460 |
| epidemiologic studies of leptospiroses in the plovdiv region of bulgaria. | the natural habitat of leptospira along the maritsa river, the high level of development of the land-cultivation and cattle-raising underscore the importance of establishing the exact prevalence of leptospiroses ranking it among the highest in the country. the changes occurring in the economy and land-making of the country following 1990 are reflected in the prevalence of leptospiroses during this period. | 1999 | 10786209 |
| [atomic absorption determination of heavy metals in the milk and meat from several regions of bulgaria]. | by aas after wet digestion of the samples the results were 20% higher (for milk) and 41% higher (for meat) in comparison with dry coshing. cow and ewe milk and pork, beef, and mutton were sampled in six regions of the country and were studied with regard to residual amounts of four trace elements. highest appeared to be the content of zinc, and lowest--the content of cadmium. the results were compared with data of workers abroad. on the basis of results of personal investigations and studies of ... | 1982 | 7168140 |