[State of Fungal Lipases of Rhizopus microsporus, Penicillium sp. and Oospora lactis in Border Layers Water-Solid Phase and Factors Affecting Catalytic Properties of Enzymes].

We demonstrated that a change in the catalytic activity of fungal lipases synthesized by Rhizopus microsporus, Penicillium sp. and Oospora lactis and their ability to absorb on different sorbents depended on the nature of groups on the solid phase surface in the model systems water: lipid and water: solid phase. Thus, the stability of Penicillium sp.

[Microbiological evaluation of chicken meal "shaverma" as a factor for Salmonella transmission].

It has been established that the dish shawarma may be a factor for Salmonella transmission, by involving in sporadic and outbreak cases of Salmonella infection. Chicken fillet grilling when cooking the dish shawarma has been found to ensure its guaranteed freedom from Salmonella only in a piece less than 2 cm thick. Deeper layers of chicken and its juice that accumulates in the grill tray may remain be Salmonella-contaminated throughout the heat treatment.

[Influence of dairy food rotavirus contamination on morbidity].

The indirect hemagglutation test (IHT) indicated that rotaantigen infection of dairy foods (DF) selected at the milk processing shop in the year of high morbidity due to rotavirus infection (RVI) averaged 12.4%. Laboratory monitoring of DF sold in the year of relative low morbidity could establish that the rate of their rotaantigen contamination averaged 4.

[The effect of acid proteinases on the activity and stability of glucoamylase preparations].

It was demonstrated that the presence of acid proteinases in the preparation isolated from Aspergillus awamori decreased the activity and stability of glucoamylase. Patterns of changes in the enzymatic activity and stability of glucoamylase at increased temperature and various pH values were studied over a long-term storage. A biospecific sorbent for removal of acid proteinases was synthesized, and glucoamylase preparations free of proteolytic activity were produced.

[Propagation of hepatitis E virus in an endemic and nonendemic regions].

The role of hepatitis E (HE) in sporadic morbidity at an endemic territory (Southern Uzbekistan) and the incidence of anti-HEV in different populations of a nonendemic region (Russia) were evaluated. Antibodies to HEV were detected in 22.1% of patients with acute HE, including mixed infections (+ HA or HB), in the Dekhkanabad district of Kashkadarya region in 1993.

[An assessment of the connection between the annual population morbidity of salmonellosis due to Salmonella enteritidis and the dynamics of the epizootic process among chickens in commercial poultry plants].

The dynamics of annual morbidity in salmonellosis caused by S. enteritidis among the population of Perm during the period of 1987-1992 was analyzed. Blood sera taken from 4,689 practically healthy donors and from 6,997 hens at poultry breeding complexes were studied in the passive hemagglutination test with the use of complex Salmonella diagnosticum.

[An evaluation of the scope of the circulation of Salmonella among the workers of commercial poultry- and meat-packing enterprises based on serological study data in the PHA test].

Serum samples from 641 workers of large poultry and meat-packing plants were studied in the passive hemagglutination test with the use of Salmonella complex and serogroup diagnostica. A specific increase in the level of anti-Salmonella antibodies in 60.7% of poultry plant workers and in 9.

[Characteristics of work intensity and fatigue in proof-readers in the polygraphic industry].

A group of proof-readers showed the elective resistance to fatigue from visual work by the end of working shift. Changed near point, decreased power and hardiness of the hand, aggravated self appraisal were more significant than altered achromatic visual stability, time of motor response to the light and critical flicker fusion frequency. The studied parameters were compared making use of Derevianko's index.

[Various lipases for producing products enriched with polyenic acids in fish fat hydrolysis].

The enzymic hydrolysis of fish with lipases from various sources was studied. The lipase from the fungus Rhizopus microsporus preferentially removes saturated fatty acids, while lipase from the pyloric caeca of salmon unsaturated fatty acids upon hydrolysis of fish fats. The enzymes can be used to obtain fatty products enriched with eicosanopentaenoic acid, mono- and diacylglycerols by enzymic hydrolysis of the ivasi fat.