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Biomedical subjects

A I Nesterov

Publications and source records attributed to A I Nesterov.

At least 37 records · Page 2Linked to original sources
PubMedDate not supplied

[Respiration of an obligate methylotroph in the presence of various substrates].

Respiration of the cells of Methylococcus ucrainicus, strain 21, cultivated in the atmosphere of methane, is stimulated by methanol, formaldehyde, formate, n-alcohols, and allyl alcohol. The rate of oxygen assimilation is lower in the presence of isopropanol, isobutanol, propane, butane, maltose, and some organic acids (acetate, fumarate, citrate, succinate). The Michaelis constant for methanol is 88 mcM. Oxidation of methane, methanol, formaldehyde, and formate by the bacterium is inhibited by cyanide, hydroxylamine, and azide. The rate of oxygen assimilation by the cells in the presence of methane and other C1-compounds did not decrease after the suspension had been stored at 4 degrees C during four months and longer.

Culture Media↗
PubMedDate not supplied

[Activity of methane-oxidizing bacteria in the adsorbed state].

Adsorption of pure cultures of methane oxidizing bacteria, Methylosinus trichosporium 20 and Methylococcus ucrainicus 21, on glass and coal was studied; the former strain was sorbed on both sorbents, the latter strain was sorbed on coal but not on glass. The rate of methane oxidation by the cells of adsorbed microorganisms was higher than in the case of free cells, and increased with a decrease in dimensions of the sorbent particles.

Adsorption↗
PubMedDate not supplied

[Disintegration of cells of methane oxidizing bacteria by gas decompression].

The efficacy of disrupting cells of methane oxidizing bacteria M. trichosporium strain 20 by air decompression was measured. The efficacy increased with a rise of the gas pressure, density of the bacterial suspension and the ratio of the air and suspension volumes. The relationship between the efficacy of disruption of the microorganisms and the rate of pressure reduction showed a distinct maximum. The efficacy of the bacterial disruption did not change with an increase of the time of saturation of the bacterial suspension by air from 30 sec. to 60 min.

Bacteria↗
PubMedDate not supplied

[Alexsandro Robecchi].

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History, 20th Century↗