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Biomedical subjects

N M Shevchenko

Publications and source records attributed to N M Shevchenko.

54 records · Page 3Linked to original sources
PubMed1983

[Genetic control of the ACTH content of mouse plasma].

The content of ACTH in blood plasma of C57BL/6, BALB/C, F1, F2, and F1 X BALB/C mice was measured before and after an open-field exposure to emotional stress. Differences in the initial content of hormone and its changes after stress were revealed as dependent on the animal line. A suggestion is made about monogenic control over the initial level of ACTH.

Adrenocorticotropic Hormone↗
PubMedDate not supplied

[Screening of marine bacteria for fucoidan hydrolases].

Twenty-five strains of epiphytic marine bacteria isolated from the brown algae Fucus evanescens and Chorda filum and fifty-three bacteria isolated from the sea cucumber Apostichopus japonicus were screened for fucoidanases using fucoidans prepared from the brown algae F. evanescens, Laminaria cichorioides, and L. japonica. Eighteen bacterial epiphytes and thirty-eight bacterial isolates from the sea cucumber were found to contain fucoidanases, which were able to hydrolyze either all of the fucoidans studied or some of them. Bacteria of the genera Cytophaga and Alteromonas/Pseudoalteromonas exhibited the highest fucoidanase activities, which, however, did not exceed the activity of fucoidanases from the already known sources.

Animals↗
PubMedDate not supplied

[Polysaccharides of diatoms occurring in Lake Baikal].

Polysaccharide composition of neutral, acid- and alkali-soluble fractions of the diatoms Stephanodiscus meyerii Genkal et Popovsk and Aulacoseira baicalensis (K. Meyer) Simonsen of Lake Baikal has been studied. Neutral polysaccharides were represented by chrysolaminarans (1-->3;1-->6-beta-D-glucans). The chrysolaminaran from S. meyerii consists of the high- and low-molecular-weight fractions (40 and 2-5 kDa, respectively) and contains a large number of beta-1-->6-bound glucose residues. The chrysolaminaran from A. baicalensis is a low-molecular-weight 1-->3:1-->6-beta-D-glucan containing a small number of beta-1-->6 bonds, with mannitol being attached to the reducing unit of its chain. Acid- and alkali-soluble polysaccharide fractions are practically absent in S. meyerii. The alkali-soluble fraction from A. baicalensis is a low-molecular-weight (2-kDa) glycoprotein, the carbohydrate moiety of which is represented by a heteropolysaccharide.

Molecular Weight↗