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[Role of the Microbial Community in Formation of Speleothem (Moonmilk) in the Snezhnaya Carst Cave (Abkhazia).]

https://arctichealth.org/en/permalink/ahliterature289528
Source
Mikrobiologiia. 2016 Sep; 85(5):598-608
Publication Type
Journal Article
Date
Sep-2016
Source
Mikrobiologiia. 2016 Sep; 85(5):598-608
Date
Sep-2016
Language
Russian
Publication Type
Journal Article
Keywords
Calcium - chemistry
Calcium Carbonate - chemistry
Caves - microbiology
Cold Temperature
Comamonadaceae - growth & development - metabolism
Ferric Compounds - chemistry
Russia
Abstract
The resi Its of investigation of speleothem (moonmilk) from the Snezhnaya cave (West Caucasus, Abkhazia) are-reported. The structure of microbial complexes from moonmilk was investigated by quantita- tive PCR; strains of culturable microorganisms were isolated and their preferred temperature and carbon sources were determined. Among eubacteria, -34% belonged to the iron bacteria (Rhodoferax). Most bacte- rial strains were shown to be facultative psychrophiles with the maximum growth rate at 4C. The microstruc- ture and elemental composition of mionmilk were investigated using a scanning electron microscope (EVO- 40HV, Carl Zeiss) and silicon drifi X-ay detector X-MAX 80 ffM2' The visually plastic and homogeneous mass of moonmilk was shown to be highly heterogeneous, containing various microstructures. The elemental composition of some nanostructures depended on the structure of bacterial biofilms. Some loci of the biofilm were found to contain up to 46% (wt/wt) of iron oxides. Calcium content was high, up to 61.5% (wt/wt) only in cubic crystalline structures which were not involved in microbiological processes.
PubMed ID
29364607 View in PubMed
Less detail

[Role of the Microbial Community in Formation of Speleothem (Moonmilk) in the Snezhnaya Carst Cave (Abkhazia).]

https://arctichealth.org/en/permalink/ahliterature289686
Source
Mikrobiologiia. 2016 Sep; 85(5):598-608
Publication Type
Journal Article
Date
Sep-2016
Source
Mikrobiologiia. 2016 Sep; 85(5):598-608
Date
Sep-2016
Language
Russian
Publication Type
Journal Article
Keywords
Calcium - chemistry
Calcium Carbonate - chemistry
Caves - microbiology
Cold Temperature
Comamonadaceae - growth & development - metabolism
Ferric Compounds - chemistry
Russia
Abstract
The resi Its of investigation of speleothem (moonmilk) from the Snezhnaya cave (West Caucasus, Abkhazia) are-reported. The structure of microbial complexes from moonmilk was investigated by quantita- tive PCR; strains of culturable microorganisms were isolated and their preferred temperature and carbon sources were determined. Among eubacteria, -34% belonged to the iron bacteria (Rhodoferax). Most bacte- rial strains were shown to be facultative psychrophiles with the maximum growth rate at 4C. The microstruc- ture and elemental composition of mionmilk were investigated using a scanning electron microscope (EVO- 40HV, Carl Zeiss) and silicon drifi X-ay detector X-MAX 80 ffM2' The visually plastic and homogeneous mass of moonmilk was shown to be highly heterogeneous, containing various microstructures. The elemental composition of some nanostructures depended on the structure of bacterial biofilms. Some loci of the biofilm were found to contain up to 46% (wt/wt) of iron oxides. Calcium content was high, up to 61.5% (wt/wt) only in cubic crystalline structures which were not involved in microbiological processes.
PubMed ID
29364607 View in PubMed
Less detail