Aerobic mineralization of chlorobenzoates by a natural polychlorinated biphenyl-degrading mixed bacterial culture

1993 ◽  
Vol 40 (4) ◽  
pp. 541-548 ◽  
Author(s):  
F. Fava ◽  
D. Di Gioia ◽  
L. Marchetti ◽  
G. Quattroni ◽  
V. Marraffa
Keyword(s):  
Polychlorinated Biphenyl ◽  
Bacterial Culture ◽  
Mixed Bacterial Culture

scholarly journals Isolation of Mixed Bacterial Culture from Rajshahi Silk Industrial Zone and their Efficiency in Azo Dye Decolorization

2015 ◽  
Vol 8 (10) ◽  
pp. 950 ◽  
Author(s):  
Farhana Parvin ◽  
Muhammed Mizanur Rahman ◽  
Md. Mahmudul Islam ◽  
Naoshin Jahan ◽  
Md. Pallob Ebna Shaekh ◽  
...  
Keyword(s):  
Azo Dye ◽  
Bacterial Culture ◽  
Dye Decolorization ◽  
Industrial Zone ◽  
Mixed Bacterial Culture ◽  
Azo Dye Decolorization

scholarly journals Enrichment Versus Bioaugmentation—Microbiological Production of Caproate from Mixed Carbon Sources by Mixed Bacterial Culture and Clostridium kluyveri

2020 ◽  
Vol 54 (9) ◽  
pp. 5864-5873 ◽  
Author(s):  
Roman Zagrodnik ◽  
Anna Duber ◽  
Mateusz Łężyk ◽  
Piotr Oleskowicz-Popiel
Keyword(s):  
Bacterial Culture ◽  
Carbon Sources ◽  
Mixed Bacterial Culture ◽  
Clostridium Kluyveri

Enrichment of a Mixed Bacterial Culture with a High Polyhydroxyalkanoate Storage Capacity

2009 ◽  
Vol 10 (4) ◽  
pp. 670-676 ◽  
Author(s):  
Katja Johnson ◽  
Yang Jiang ◽  
Robbert Kleerebezem ◽  
Gerard Muyzer ◽  
Mark C. M. van Loosdrecht
Keyword(s):  
Storage Capacity ◽  
Bacterial Culture ◽  
Mixed Bacterial Culture

Catabolism of terbuthylazine by mixed bacterial culture originating from s-triazine-contaminated soil

2014 ◽  
Vol 98 (16) ◽  
pp. 7223-7232 ◽  
Author(s):  
Tamara Jurina ◽  
Senka Terzić ◽  
Marijan Ahel ◽  
Sanja Stipičević ◽  
Darko Kontrec ◽  
...  
Keyword(s):  
Contaminated Soil ◽  
Bacterial Culture ◽  
Mixed Bacterial Culture

scholarly journals Bioconversion of 3beta-acetoxypregna-5,16-diene-20-one to androsta-1,4-diene-3,17-dione by mixed bacterial culture

2002 ◽  
Vol 35 (2) ◽  
pp. 95-97 ◽  
Author(s):  
S. Patil ◽  
A. Shukla ◽  
K. Shinde ◽  
T. Banerjee
Keyword(s):  
Bacterial Culture ◽  
Mixed Bacterial Culture

Influence of chemical surfactants on the biodegradation of crude oil by a mixed bacterial culture

1999 ◽  
Vol 45 (2) ◽  
pp. 130-137 ◽  
Author(s):  
J D Van Hamme ◽  
O P Ward
Keyword(s):  
Molecular Structure ◽  
Crude Oil ◽  
Petroleum Hydrocarbon ◽  
Bacterial Culture ◽  
Total Petroleum Hydrocarbon ◽  
Mixed Bacterial Culture ◽  
Nonylphenol Ethoxylate ◽  
Oil Biodegradation ◽  
Enhanced Biodegradation ◽  
Microbial Systems

The effects of surfactant physicochemical properties, such as the hydrophile-lipophile balance (HLB) and molecular structure, on the biodegradation of 2% w/v Bow River crude oil by a mixed-bacterial culture were examined. Viable counts increased 4.6-fold and total petroleum hydrocarbon (TPH) biodegradation increased 57% in the presence of Igepal CO-630, a nonylphenol ethoxylate (HLB 13, 0.625 g/L). Only the nonylphenol ethoxylate with an HLB value of 13 substantially enhanced biodegradation. The surfactants from other chemical classes with HLB values of 13 (0.625 g/L) had no effect or were inhibitory. TPH biodegradation enhancement by Igepal CO-630 occurred at concentrations above the critical micelle concentration. When the effect of surfactant on individual oil fractions was examined, the biodegradation enhancement for the saturate and aromatic fractions was the same. In all cases, biodegradation resulted in increased resin and asphaltene concentrations. Optimal surfactant concentrations for TPH biodegradation reduced resin and asphaltene formation. Chemical surfactants have the potential to improve crude oil biodegradation in complex microbial systems, and surfactant selection should consider factors such as molecular structure, HLB, and surfactant concentration.Key words: mixed culture, crude oil, surfactant, hydrophile-lipophile balance, biodegradation.

scholarly journals Enrichment of an Endosulfan-Degrading Mixed Bacterial Culture

2000 ◽  
Vol 66 (7) ◽  
pp. 2822-2828 ◽  
Author(s):  
Tara D. Sutherland ◽  
Irene Horne ◽  
Michael J. Lacey ◽  
Rebecca L. Harcourt ◽  
Robyn J. Russell ◽  
...  
Keyword(s):  
Bacterial Culture ◽  
Parent Compound ◽  
Tween 80 ◽  
Sole Source ◽  
Gas Chromatography Mass Spectrometry ◽  
Mixed Bacterial Culture ◽  
Chemical Hydrolysis ◽  
History Of ◽  
Hydrolyzing Enzymes ◽  
Polar Product

ABSTRACT An endosulfan-degrading mixed bacterial culture was enriched from soil with a history of endosulfan exposure. Enrichment was obtained by using the insecticide as the sole source of sulfur. Chemical hydrolysis was minimized by using strongly buffered culture medium (pH 6.6), and the detergent Tween 80 was included to emulsify the insecticide, thereby increasing the amount of endosulfan in contact with the bacteria. No growth occurred in control cultures in the absence of endosulfan. Degradation of the insecticide occurred concomitant with bacterial growth. The compound was both oxidized and hydrolyzed. The oxidation reaction favored the alpha isomer and produced endosulfate, a terminal pathway product. Hydrolysis involved a novel intermediate, tentatively identified as endosulfan monoaldehyde on the basis of gas chromatography-mass spectrometry and chemical derivatization results. The accumulation and decline of metabolites suggest that the parent compound was hydrolyzed to the putative monoaldehyde, thereby releasing the sulfite moiety required for growth. The monoaldehyde was then oxidized to endosulfan hydroxyether and further metabolized to (a) polar product(s). The cytochrome P450 inhibitor, piperonyl butoxide, did not prevent endosulfan oxidation or the formation of other metabolites. These results suggest that this mixed culture is worth investigating as a source of endosulfan-hydrolyzing enzymes for use in enzymatic bioremediation of endosulfan residues.

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