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1

Chromophores of dissimilatory sulphite reductase from wild strains Desulfovibrio desulfuricans

100%
Dzierzewicz Z., Cwalina B., Gawlik B., Bulas L.
Acta Biochimica Polonica
|
1993
|
tom 40
|
nr 1
2

Oczyszczanie sciekow przemyslu spozywczego w procesie biologicznej desulfurykacji

88%
Gasiorek J., Gasiorek P.
Przemysł Spożywczy
|
1998
|
tom 52
|
nr 10
36
W artykule przedstawiono wyniki badań laboratoryjnych procesu mikrobiologicznej desulfurykacji z udziałem bakterii Desulfovibrio desulfuricans stosowanego do oczyszczania ścieków przemysłu spożywczego, zwłaszcza z produkcji mączki ziemniaczanej, przetwórstwa mleka, z uboju trzody chlewnej i przetwórstwa owoców i warzyw. Podano także parametry i rezultaty przemysłowego oczyszczania ścieków technologicznych bardzo obciążonych substratów organicznych – z fermentorów, leżakowni i obciągu beczkowego, jakie uzyskuje się w oczyszczalni ścieków, uruchomionej w 1991 r. na terenie Zakładów Piwowarskich w Siemianowicach ŚI..
3

Effect of copper ions on hydrogenase activity of Desulfovibrio desulfuricans

75%
Dzierzewicz Z., Cwalina B., Gawlik B.
Acta Biochimica Polonica
|
1992
|
tom 39
|
nr 1
4

Enhancement of continuous biodegradation of sulphates and organic pollutants by Desulfovibrio desulfuricans via biomass recirculation

63%
Kosinska K., Miskiewicz T.
Electronic Journal of Polish Agricultural Universities. Series: Biotechnology
|
2005
|
tom 08
|
nr 3
5

Interstrain diversity of 2-keto-3-deoxyoctonate content in lipopolysaccharides of Desulfovibrio desulfuricans

63%
Lodowska J., Wolny D., Jaworska-Kik M., Dzierzewicz Z., Weglarz L.
Polish Journal of Microbiology
|
2009
|
tom 58
|
nr 1
21-27
Bacteria of Desulfovibrio desulfuricans species are Gram-negative, anaerobic rods selectively reducing sulphates and colonizing oxygen-free ecosystems. They are ubiquitous in the natural environment and have been also found to reside in the human digestive tract. They are suggested to be involved in the pathogenesis of ulcerative colitis and Crohn's disease. The D. desulfuricans wild strains were isolated from feces and bioptate of patients suffering from various digestive tract disorders. LPSs were isolated from the wild enteric strains and soil type strain La 2226 of D. desulfuricans and analyzed in terms of their 2-keto-3-deoxyoctulosonic acid (Kdo) component content. The obtained spectrophotometric data indicate that Kdo content is characteristic of each of the investigated strains and it ranges from 0.48% to 2.86% (w/w) of the total LPS mass. Statistically significant interstrain differences of Kdo quantity seem to suggest the differences in the O-antigen content. Comparative analysis of Kdo content in LPSs of D. desulfuricans strains in relation to that of the reference endotoxin from Salmonella spp. allows us to suggest that D. desulfuricans bacteria possess O-antigen polysaccharides composed of diverse number of carbohydrate units.
6

Desulfovibrio desulfuricans lipopolysaccharides induce endothelial cell IL-6 and IL-8 secretion and E-selectin and VCAM-1 expression

63%
Weglarz L., Dzierzewicz Z., Skop B., Orchel A., Parfiniewicz B., Wisniowska B., Swiatkowska L., Wilczok T.
Cellular and Molecular Biology Letters
|
2003
|
tom 08
|
nr 4
The aim of this study was to determine whether Desulfovibrio desulfuricans-derived LPS stimulate the release of IL-6 and IL-8 from ECs and the expression of their adhesion molecules at the transcriptional level. Confluent monolayers of HUVEC were incubated in the absence or presence of 20 μg/ml and 60 μg/ml LPSs derived from the DdT and DdA bacterial strains. Also, the simultaneous stimulation of cells with LPSs and IL-1β was evaluated. The levels of cytokines released were measured using ELISA. LPS-activated HUVEC increased the secretion of both IL-6 and IL-8, which was not LPS dose dependent. The expression of E-selectin and VCAM-1 was assessed by TR-PCR. The transcripts were detectable at all the concentrations (20, 40, 60 μg/ml) of LPSs used. These results suggest that D. desulfuricans LPS may activate immune functions in endothelial cells and influence the inflammatory response during bacteremia caused by these bacteria.
7

Transformation of various sulphur substrates and corrosion of copper by sulphate reducing bacteria

63%
Dzierzewicz Z., Cwalina B., Bulas L., Gawlik B.
Acta Biologica Cracoviensia. Series Botanica
|
1992-1993
|
tom 34-35
The capability of reduction of oxidized sulphur compounds (sulphates, sulphites and thiosulphates) by wild strains of sulphate reducing bacteria (SRB) Desulfovibrio desulfuricans DV-5/86 and Desulfotomaculum nigriflcans DT-5/86 was estimated basing on dynamics of hydrogen sulphide liberation. The effectiveness of these processes was correlated with the biocorrosion rate of metallic copper in artificial aqueous media containing above mentioned substrates. It was demonstrated that corrosive aggressiveness of used media with selected sulphur compounds and investigated bacteria strains were the highest in the presence of S2O3-2 ions and the lowest in the system containing SO4-2 ions.
8

Isolation and evaluation of susceptibility to sulphasalazine of Desulfovibrio desulfuricans strains from the human digestive tract

63%
Dzierzewicz Z., Cwalina B., Gawlik B., Wilczok T., Gonciarz Z.
Acta Microbiologica Polonica
|
1997
|
tom 46
|
nr 2
9

Effect of endotoxins isolated from Desulfovibrio desulfuricans soil and intestinal strain on the secretion of TNF-alpha by human mononuclear cells

63%
Weglarz L., Parfiniewicz B., Mertas A., Kondera-Anasz Z., Jaworska-Kik M., Dzierzewicz Z., Swiatkowska L.
Polish Journal of Environmental Studies
|
2006
|
tom 15
|
nr 4
Mononuclear cells play an important role in the regulation of microbe-induced inflammation, in part through their ability to secrete cytokines in response to microorganisms and their products. To evaluate the effects of Desulfovibrio desulfuricans-derived endotoxins on TNF-a induction, lipopolysaccharides (LPSs) isolated from soil and intestinal strain were used to stimulate peripheral blood mononuclear cells. The effect of these LPSs was assessed in comparison to that of LPSs from Escherichia coli, Salmonella minnesota and of lipid A from Salmonella minnesota. Level of TNF-a was measured by enzyme-linked immunosor­bent assay. D. desulfuricans LPSs at the highest dose (1000 ng/ml) displayed greater biological potency in inducing TNF-a secretion than other endotoxins used which indicates that these LPSs may act as a critical regulatory factor in bacteremia caused by these microorganisms.
10

Restriction profiles of plasmid DNA from wild strains of Desulfovibrio desulfuricans

63%
Dzierzewicz Z., Cwalina B., Szczerba J., Bednarek I., Mazurek U., Wilczok T.
Acta Biologica Cracoviensia. Series Botanica
|
2001
|
tom 43
One of many strategies of bacteria survival in a contaminated environment is plasmid-encoded resistance to toxic substances. D. desulfuricans wild strains isolated from soil and mud samples taken from contaminated sites were studied to identify plasmids in these bacteria and to examine their restriction profiles. The presence of plasmid DNA in all tested strains was demonstrated. Using B.stEII-digested DNA of phage λ. as the molecular standard, plasmid size was established at ~2.3 kbp. The restriction fragments obtained after cutting plasmid DNA with endonuclease HaeIII or AluI were better separated on gradient polyacrylamide gel than on homogeneous gel. Very high similarity between the fragment profiles was demonstrated, despite the different origins of the strains tested.
11

Isolation and evaluation of corrosive aggressivity of wild strains of sulphate-reducing bacteria

51%
Dzierzewicz Z., Cwalina B., Weglarz L., Glab S.
Acta Microbiologica Polonica
|
1992
|
tom 41
|
nr 3-4
12

Differences in hydrogenase and APS-reductase activity between Desulfovibrio desulfuricans strains growing on sulphate or nitrate

51%
Dzierzewicz Z., Cwalina B., Chodurek E., Bulas L.
Acta Biologica Cracoviensia. Series Botanica
|
1997
|
tom 39
The study compares growth rates and hydrogenase and APS-reductase activity in crude cell extracts obtained from eight wild strains of dissimilatory sulphate-reducing bacteria of the Desulfovibrio desulfuricans species, growing on sulphate or nitrate as sole energy source. The obtained results indicated that the investigated bacterial strains could utilize nitrate as an alternative terminal electron acceptor. Nitrate respiration abilities differed among the investigated bacterial populations. Some nitrate-utilizing cultures grew more rapidly than sulphate-utilizing ones, whereas other strains gave identical or inconsiderably lower cell density. This was true also when hydrogenase activity was analyzed. This enzyme-specific activity was generally almost directly proportional to the specific growth rate determined for strains cultured on sulphate or nitrate, respectively. The specific activity of APS-reductase indicated a large (10-20-fold) decrease in crude cell extracts obtained from bacteria growing in the presence of nitrate as compared to sulphate-utilizing ones.
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