Разнообразие И Физиолого-Биохимические Свойства Гетеротрофных Бактерий, Выделенных Из Нейстона Озера Байкал

Галачьянц, А. Д.; Белькова, Н. Л.; Суханова, Е. В.; Romanovskaia, V A; Гладка, Г. В.; Bedoshvili, E D; Парфенова, В. В.

doi:10.7868/s0026365616050062

Cited by 2 publications

(1 citation statement)

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“…В культурах, выделенных из термальных вод, отмечены и грамотрицательные и грамположительные бактерии. В микробных матах участка М- 3 Необходимо отметить, что МИК свинца, по сравнению с другими металлами, был наиболее высок для всех изученных штаммов (табл. 3).…”

Section: Introductionunclassified

Ecological and biochemical properties of thermophilic bacteria taken from the Dachnie hot springs of Kamchatka (Far East, Russia)

Lebedeva

Геннадьевна²,

Kharitonova

et al. 2020

Samara Journal of Science

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In this work, we studied some ecological and biochemical characteristics (cultural, morphological, physiological and biochemical properties, extracellular enzymatic activity, bacterial growth in various ranges of temperatures, pH, NaCl concentrations, resistance to heavy metals) of 14 strains of thermophilic bacteria taken from thermal waters and microbial mats of Kamchatka Dachnie springs. On selective environment the strains formed mostly transparent, beige, white-gray, brown, yellow and pink colonies. It was shown that the isolates were represented most of all by asporogenic, catalase-positive and oxidase-positive, mobile, gram-negative rods of various sizes. Most of the cultures were capable of forming exozymes, especially amylases and proteinases. The strains grew in a wide range of temperatures (3550C), pH (58), NaCl concentration (15%) and were characterized by increased resistance to a number of heavy metals. 4 strains of thermophilic heterotrophic bacteria exhibited multiple multidrug resistance to metals. They were identified and it was shown that the isolates were represented by bacteria of the genus Bacillus sp. (№ 19), Thermus sp. (№ 40), Pseudomonas sp. (№ 15), Rhizobium sp. (№ 125). The strains with high enzymatic activity and increased resistance to pollutants are promising for use in the field of ecology for cleaning contaminated environmental objects.

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Section: Introductionunclassified

Ecological and biochemical properties of thermophilic bacteria taken from the Dachnie hot springs of Kamchatka (Far East, Russia)

Lebedeva

Геннадьевна²,

Kharitonova

et al. 2020

Samara Journal of Science

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Hydrocarbons at the Water-Atmosphere Border in the Barents and Kara Sea

Nemirovskaya,

Khramtsova

2023

Okeanologiâ

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The concentrations and composition of hydrocarbons (HCs), aliphatic (AHCs), and polycyclic aromatic hydrocarbons (PAHs) in the Barents and Kara Seas were determined in the surface microlayer (SML, 300 µm thick), melting ice, and surface waters. Field material was collected in 80 and 83 cruises of the R/V Akademik Mstislav Keldysh in August 2020 and June 2021, respectively. In SML, HCs occur primarily in suspension. In the Barents Sea, the AHCs content in suspension was lower (31–96, 68 µg/l on average) compared with the Kara Sea (187–1051, 693 µg/L on average), where examination was carried out in the early summer season. In the Kara Sea, the AHCs concentrations in the SML were 3.6 times higher than in the dissolved form (89–270, 158 μg/L on average), while compared to the suspension of surface waters, they were almost 15 times higher. The accumulation of organic compounds also occurs in ice, but to a lesser extent than in SML. From the alkanes composition, the influence of autochthonous processes on HCs generation in melting ice is insignificant. The PAHs contents in suspension were also 4.8 times higher on average than in the dissolved form. An influence of combustion products of ship fuel on the composition of PAHs was traced by markers, which showed that in addition to phenanthrene, in all samples fluoranthene and pyrene dominated.

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Разнообразие И Физиолого-Биохимические Свойства Гетеротрофных Бактерий, Выделенных Из Нейстона Озера Байкал

Cited by 2 publications

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Ecological and biochemical properties of thermophilic bacteria taken from the Dachnie hot springs of Kamchatka (Far East, Russia)

Ecological and biochemical properties of thermophilic bacteria taken from the Dachnie hot springs of Kamchatka (Far East, Russia)

Hydrocarbons at the Water-Atmosphere Border in the Barents and Kara Sea

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