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1 652 záznamů v Medvik

Kniha

Biomedical sciences instrumentation. Volume 10, Proceedings of the 11th National biomedical sciences instrumentation symposium held April 15-17, 1974, Colorado Springs
[Proceedings of the 11th National biomedical sciences instrumentation symposium held April 15-17, 1974, Colorado Springs]

National biomedical sciences instrumentation symposium (11. : 1974 : Colorado Springs)
Autor National biomedical sciences instrumentation symposium
Barnett, R. D
Autor Barnett, R. D

Pittsburgh : Instrument Society of America, 1974

181 s. : il.

Konspekt
Farmacie. Farmakologie
NLK Obory
technika lékařská, zdravotnický materiál a protetika

Článek online

Domination of Filamentous Anoxygenic Phototrophic Bacteria and Prediction of Metabolic Pathways in Microbial Mats from the Hot Springs of Al Aridhah

... Microbial mats in hot springs form a dynamic ecosystem and support the growth of diverse communities ...

Folia biologica (Praha). 2020 ; 66 (1) : 24-35.

Folia biol. (Praha)
ISSN 0015-5500
Medvik
Zdroj

Microbial mats in hot springs form a dynamic ecosystem and support the growth of diverse communities with broad-ranging metabolic capacity. In this study, we used 16S rRNA gene amplicon sequencing to analyse microbial communities in mat samples from two hot springs in Al Aridhah, Saudi Arabia. Putative metabolic pathways of the microbial communities were identified using phylogenetic investigation of communities by reconstruction of unobserved states (PICRUSt). Filamentous anoxygenic phototrophic bacteria associated with phylum Chloroflexi were abundant (> 50 %) in both hot springs at 48 °C. Chloroflexi were mainly represented by taxa Chloroflexus followed by Roseiflexus. Cyanobacteria of genus Arthrospira constituted 3.4 % of microbial mats. Heterotrophic microorganisms were mainly represented by Proteobacteria, Actinobacteria, Bacteroidetes, and Firmicutes. Archaea were detected at a lower relative abundance (< 1 %). Metabolic pathways associated with membrane transport, carbon fixation, methane metabolism, amino acid biosynthesis, and degradation of aromatic compounds were commonly found in microbial mats of both hot springs. In addition, pathways for production of secondary metabolites and antimicrobial compounds were predicted to be present in microbial mats. In conclusion, microbial communities in the hot springs of Al Aridhah were composed of diverse bacteria, with taxa of Chloroflexus being dominant.

Kniha

Léčivé prameny [Heilquellen] [Healing Springs]
[Heilquellen, Healing Springs]

Františkovy Lázně : Destinační a informační agentura Františkovy Lázně, 2023

1 složený list : fotografie, mapa ; 21 cm

Konspekt
Fyzioterapie. Psychoterapie. Alternativní lékařství
NLK Obory
balneologie
NLK Publikační typ
informační publikace
informační publikace

Abstrakt

Blood flow in large arteries : applications to atherogenesis and clinical medicine : international symposium held in Palm Springs : April 27-29, 1988

Basel [etc.], 1990

Monographs on atherosclerosis ; Vol. 15

[1st ed.] VII, 288 s. : obr., tab. ; 22 cm

Článek

Kocuria Bacterial Isolates from Radioactive Springs of Jáchymov spa (Joachimsthal) as Sources of Polyunsaturated Fatty Acids

... which produced polyunsaturated fatty acids (PUFA), were isolated from water samples of radioactive springs ...

Lipids. 2019 ; 54 (2-3) : 177-187. [pub] 20190306

ISSN 1558-9307
Medvik
Zdroj

Four bacterial isolates, which produced polyunsaturated fatty acids (PUFA), were isolated from water samples of radioactive springs collected from Jáchymov spa. Jáchymov (Sankt Joachimsthal) is a city in northwestern Bohemia, where Marie and Pierre Curie isolated radium in 1898 from the mineral uraninite. To date, four springs (Agricola, Behounek, C1, and Curie) have been used for spa purposes, that is for the treatment of nervous and rheumatic disorders by constantly produced radioactive gas radon (222 Rn) dissolved in the water. The radioactivity reaches 24 kBq/L. Using 16S rRNA gene sequence analysis, all four isolates were identified as members of the genus Kocuria, with two isolates designated 208 and 401 affiliated with Kocuria kristinae, while isolates 101 and 301 most likely with K. rhizophila. The content of fatty acids in polar lipids was determined by gas chromatography-mass spectrometry (GC-MS) and two PUFA, that is arachidonic and eicosapentaenoic, were identified. The position of double bonds was confirmed by GC-MS of 3-pyridylcarbinol (formerly picolinyl) esters. We assume that all four isolates of Kocuria produce PUFA to increase the stability of cell membranes, which may be impaired by the reaction of the reactive oxygen species. These can arise, for example, because of α radiation during 222 Rn decay.