Production of exopolysaccharide ethapolan by Acinetobacter sp. IMV B–7005 on fried oil and oil–containing mixed substrates

2020 ◽  
Vol XI (22) ◽  
pp. 66-75
Author(s):  
Andrii VORONENKO ◽  
Mykola IVAKHNIUK ◽  
Tetyana PIROG
Keyword(s):  
Mixed Substrates ◽  
Acinetobacter Sp ◽  
Fried Oil

A Freeze-Etch Study of Acinetobacter SP. Grown on a Hydrocarbon Substrate

1974 ◽  
Vol 32 ◽  
pp. 174-175
Author(s):  
C. L. Scott ◽  
W. R. Finnerty
Keyword(s):  
Membrane System ◽  
Structural Distortion ◽  
Intracytoplasmic Membrane ◽  
Gram Negative ◽  
Sectioned Material ◽  
Acinetobacter Sp

Acinetobacter sp. HO-1-N, a gram-negative hydrocarbon oxidizing bacterium previously designated Micrococcus cerificans, has been shown to sequester the hydrocarbon into intracytoplasmic pools as a result of growth on this substrate. In hydrocarbon grown cells, an intracytoplasmic membrane system was also observed along with a doubling of cellular phospholipids (Z). However, using conventional dehydration and embedding procedures in preparing thin sectioned material, the hydrocarbon is extracted from the cells. This may lead to structural distortion, consequently, the freeze-etch technique was applied to preserve the integrity of the cell.

Full Scale Investigations on Enhanced Biological Phosphorus Removal – P-Release in the Anaerobic Reactor

1994 ◽  
Vol 29 (7) ◽  
pp. 153-156 ◽  
Author(s):  
D. Wedi ◽  
P. A. Wilderer
Keyword(s):  
Phosphorus Removal ◽  
Full Scale ◽  
Process Conditions ◽  
Enhanced Biological Phosphorus Removal ◽  
Biological Phosphorus Removal ◽  
Anaerobic Reactor ◽  
P Release ◽  
Acinetobacter Sp ◽  
Biological Phosphorus ◽  
P Removal

Most of the fundamental processes responsible for enhanced biological phosphorus removal (EBPR) were obtained through laboratory tests under defined conditions with pure or enriched cultures. Acinetobacter sp. was identified as the most important group of bacteria responsible for bio-P removal. Full scale data showed, however, that laboratory results do not match full scale results well enough. There is a lack of data on the effects of sub-optimal process conditions such as inadequate availability of volatile fatty acids (VFA), high nitrate recycle, storm water inflow or low temperatures. In this paper the results of full scale experiments on P-release are presented and compared with theoretical values. Measurements at a full scale Phoredox-system showed a surprisingly low P-release in the anaerobic reactor. Only 4 to 10% of the phosphorus in the activated sludge was released in the bulk liquid. With laboratory batch-tests, a maximum of 20% of the P in the sludge could be released. It is assumed that under the prevailing process conditions either the fraction of Acinetobacter sp. was very small, or bacteria other than Acinetobacter sp. were responsible for the P-removal, or most of the phosphorus was bound chemically but mediated by biological processes.

scholarly journals Involvement of single-stranded tails in homologous recombination of DNA injected into Xenopus laevis oocyte nuclei.

1991 ◽  
Vol 11 (6) ◽  
pp. 3268-3277 ◽  
Author(s):  
E Maryon ◽  
D Carroll
Keyword(s):  
Homologous Recombination ◽  
Xenopus Laevis ◽  
Gel Electrophoresis ◽  
Xenopus Laevis Oocyte ◽  
Molecular Models ◽  
Mixed Substrates ◽  
Two Dimensional Gel Electrophoresis ◽  
Recombination Pathway ◽  
Made In

Homologous recombination of DNA molecules injected into Xenopus laevis oocyte nuclei is extremely efficient when those molecules are linear and have overlapping homologous ends. It was previously shown that a 5'----3' exonuclease activity in oocytes attacks injected linear DNAs and leaves them with single-stranded 3' tails. We tested the hypothesis that such tailed molecules are early intermediates on the pathway to recombination products. Substrates with 3' tails were made in vitro and injected into oocytes, where they recombined rapidly and efficiently. In experiments with mixed substrates, molecules with 3' tails entered recombination intermediates and products more rapidly than did molecules with flush ends. Molecules endowed in vitro with 5' tails also recombined efficiently in oocytes, but their rate was not faster than for flush-ended substrates. In most cases, the 5' tails served as templates for resynthesis of the 3' strands, regenerating duplex ends which then entered the normal recombination pathway. In oocytes from one animal, some of the 5' tails were removed, and this was exacerbated when resynthesis was partially blocked. Analysis by two-dimensional gel electrophoresis of recombination intermediates from 5'-tailed substrates confirmed that they had acquired 3' tails as a result of the action of the 5'----3' exonuclease. These results demonstrate that homologous recombination in oocytes proceeds via a pathway that involves single-stranded 3' tails. Molecular models incorporating this feature are discussed.

Heterotrophic nitrogen removal by Acinetobacter sp. Y1 isolated from coke plant wastewater

2015 ◽  
Vol 120 (5) ◽  
pp. 549-554 ◽  
Author(s):  
YuXiang Liu ◽  
Tingting Hu ◽  
Yujie Song ◽  
Hongping Chen ◽  
YongKang Lv
Keyword(s):  
Nitrogen Removal ◽  
Coke Plant ◽  
Acinetobacter Sp ◽  
Coke Plant Wastewater

News & Notes: Bioremediation of Crude Oil Contamination with Acinetobacter sp. A3

1997 ◽  
Vol 35 (3) ◽  
pp. 191-193 ◽  
Author(s):  
K.G. Hanson ◽  
Anuranjini Nigam ◽  
Madhavi Kapadia ◽  
Anjana J. Desai
Keyword(s):  
Crude Oil ◽  
Oil Contamination ◽  
Crude Oil Contamination ◽  
Acinetobacter Sp

Purification et propriétés physico-chimiques d'une collagénase synthétisée par une bactérie du genre Acinetobacter sp.

Biochimie ◽  
1980 ◽  
Vol 61 (10) ◽  
pp. 1169-1175 ◽  
Author(s):  
Jean-Claude Monboisse ◽  
Jean Labadie ◽  
Philippe Gouet
Keyword(s):  
Acinetobacter Sp

Reuse of Fried Oil to Obtain Biodiesel: Zeolites Y as a Catalyst

2007 ◽  
Vol 5 (1) ◽  
Author(s):  
A. Brito ◽  
M. E. Borges ◽  
R. Arvelo ◽  
F. Garcia ◽  
M. C. Diaz ◽  
...  
Keyword(s):  
Fixed Bed ◽  
Weight Ratio ◽  
Degree Of Conversion ◽  
Transesterification Reaction ◽  
Molar Ratio ◽  
Catalytic Reactor ◽  
Reaction Products ◽  
Waste Oil ◽  
Catalytic Effects ◽  
Fried Oil

The transesterification reaction is the most utilized process to obtain biodiesel. Fried oil transesterification reactions with methanol have been studied using several zeolites Y and interchanged with CsCl and KOH. The reaction has been carried out both in a slurry reactor and a fixed bed catalytic reactor. The catalytic effects of zeolites have been tested within a temperature range of 60-476°C, 2.5-5% catalyst/waste oil weight ratio, and 6:1 - 100:1 methanol/oil molar ratio. Cosolvents (THF, n-hexane) in the reaction feedstock effect have also been studied as well as catalyst regeneration effects. Viscosity of both the oil and the transesterification reaction products was determined as an initial guide to investigate the degree of conversion to biodiesel as well as FAME content by GC. When interchanged zeolites are used conversions are improved, getting the best yields (98% FAME) for the Y756 zeolite interchanged with KOH. Viscosities of the reaction product obtained reached values next to diesel standard ones.

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