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Biomedical subjects

V I Vlasov

Publications and source records attributed to V I Vlasov.

At least 19 recordsLinked to original sources
PubMed1996

[Effect of redox potential of culture broth on oxytetracycline biosynthesis].

The influence of the redox potential on the biosynthesis of oxytetracycline was studied. It was shown that during the first hours of the Streptomyces rimosus cultivation Eh decreased to the negative values. There was detected a relationship between Eh within the negative values and the antibiotic production: the lower Eh, the lower the antibiotic content in the fermentation broth by the end of the process. It was noted that the Eh value during the first days of the fermentation determined the level of the antibiotic production for the entire cycle of the biosynthesis regardless of the further cultivation conditions.

Anti-Bacterial Agents↗
PubMed1983

[Method for the short-term prognosis of annual morbidity indices in Sonne-type dysentery].

A method for making the short-term prognosis of the annual morbidity rate in Sonne dysentery, both total and among individual groups of population, is presented. The preliminary prognosis is based on the expected data on meteorological factors, supplied by the weather forecast service, and the final prognosis, on the actual prognostic factors for June-July of the current (prognosed) year.

Computers↗
PubMed1982

[Manifestations of the cyclic nature of the epidemic process in dysentery].

Different forms of dysentery, especially those caused by Sh. sonnei and Sh. flexneri, have been found to differ considerably in their cyclic recurrence. The development cycles of the epidemic processes of dysentery have an objective character, occur in the presence of any tendencies in the morbidity rate, and depend on the natural factors. Thus, the cycles of increase and decrease in morbidity are 3, 6, 9, 12 years for dysentery caused by Sh. sonnei and 6, 7, 8 years for dysentery caused by Sh. flexneri.

Computers↗
PubMed1981

[Malignant gemmahemangioma (gemmangioma) of the breast].

One observation of a gemmahemangioma (gemmaangioma) in a woman of 45 is presented. The tumour of a rounded shape, 0.8 cm in diameter, elastic consistency, lobular on the section, was located in the subcutaneous fatty tissue of the left mammary gland. The histological structure of the tumour corresponded to gemmahemangioma consisting of vascular kidneys with polymorphism and hyperchromatosis of the nuclei of the cellular elements forming them, with marked mitotic activity. The tumour is considered to be malignant, in the early stage of its development, without definite signs of infiltrating growth.

Breast↗
PubMed1980

[Tendencies in the epidemic process of dysentery in Ryazan].

In shigellosis caused by Sh. sonnei and Sh. flexneri the epidemic process was found to have considerable difference in the tendencies and pace of its development. Shigellosis which dominated in the etiological structure at the period following 1966 was dysentery caused by Sh. sonnei; it showed the tendency towards a decrease in morbidity rate. Dysentery caused by Sh. flexneri was second in respect to the frequency of its occurrence after 1966 and showed the tendency towards increase. The simultaneous circulation of Sh. sonnei and Sh. flexneri, the differences in the epidemiology of these types of shigellosis make it imperative that they be studied separately, taking into ccount their etiological selectivity to the main routes of transmitting the infection.

Dysentery, Bacillary↗
PubMed1980

[Use of data on Shigella contamination and immunity indices for studying the activity of the epidemic process in dysentery].

The comparative study of the monthly distribution of characteristics indicating the levels of contamination with Sh. sonnei and Sh. flexneri separately, as well as the seasonal dynamics of the corresponding antibodies, in the years with high and low morbidity levels has been made with the use the indirect hemagglutination test. The possibility of using these characteristics for the evaluation of the activity of the epidemic process in dysentery caused by Sh. sonnei is shown.

Disease Outbreaks↗