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E V Churnosov

Publications and source records attributed to E V Churnosov.

4 recordsLinked to original sources
PubMed1992

[The methodological aspects in enhancing the efficacy of the epidemiological surveillance of HIV infection].

Using a systems approach, the authors examined the main principles underlying an expert-based system for epidemiological surveillance over HIV infection. The principle objective is to control the processes which precede the occurrence of new infected cases and further spread of HIV infection. Accordingly, the system should address the following: epidemiological diagnosis and prediction of HIV incidence and spread, development of optimal preventive anti-epidemiological measures, research into how the infection spread. This should incorporate a database which is made by the hierarchic principle: the parameters of higher levels include those of lower level. So that the highest level would include two main integral estimates characterizing the risk of HIV from the outside (the first estimate) and the risk of HIV infection (the second estimate).

Acquired Immunodeficiency Syndrome↗
PubMedDate not supplied

[Circadian cycles of wakefulness and rest in Rana temporaria frogs].

In the diurnal activity of the frog R. temporaria, rest and awakefulness stages were investigated. Resting stage was differentiated into daily and nocturnal phases. During daily rest, plastic tone in neck muscles was registered. During this phase, the head might be subjected to unnatural position which is maintained for a certain period. The heart rate was minimal, respiration could not be recorded. During nocturnal rest, in contrast to daily one, the animal changed its positon when touched at the head and kept itself in this positon. Cardiac contractions exhibited evident rhythmicity. Sleep episodes were rare and occasional; they were accompanied by eye closing and relaxation of the body.

Animals↗
PubMedDate not supplied

[Daily form of rest in the catfish Ictalurus nebulosus and the frog Rana temporaria].

By means of recording the cardiac rhythm, respiration rate and motor activity in unrestrained animals, studies have been made on the dynamics of formation of cataleptic-like immobilization in the teleost I. nebulosus. Rhythmic illumination at a rate 3/min. (10 sec light on - 10 sec light off) in the daytime gradually caused the onset of immobilization in the fish. This immobilization is characterized by the specific heart rate, type of respiration and the degree of plastic tone. Under the same experimental conditions, the formation of photogenic catalepsy in the frog Rana temporaria was confirmed. Typical heart rate, respiration pattern and the degree of plastic tone were determined as well. The role of illumination rhythm in the onset of all conditions which are characteristic for the "awakefulness-rest" cycle is discussed.

Animals↗