Optimization of polyhydroxybutyrate production by mixed cultures submitted to aerobic dynamic feeding conditions

2004 ◽  
Vol 87 (2) ◽  
pp. 145-160 ◽  
Author(s):  
Lu�sa S. Serafim ◽  
Paulo C. Lemos ◽  
Rui Oliveira ◽  
Maria A.M. Reis
Keyword(s):  
Mixed Cultures ◽  
Aerobic Dynamic Feeding

Synthesis of polyhydroxyalkanoates from different short-chain fatty acids by mixed cultures submitted to aerobic dynamic feeding

2006 ◽  
Vol 122 (2) ◽  
pp. 226-238 ◽  
Author(s):  
Paulo C. Lemos ◽  
Luísa S. Serafim ◽  
Maria A.M. Reis
Keyword(s):  
Fatty Acids ◽  
Short Chain Fatty Acids ◽  
Mixed Cultures ◽  
Short Chain ◽  
Aerobic Dynamic Feeding ◽  
Chain Fatty Acids

Impact of Transfaunation of Rumen Ciliate Cultures on Physical Examination, Selected Serum Parameters and Milk Profile in Defaunated Lactating Dairy Goats

2020 ◽  
Keyword(s):  
Physical Examination ◽  
Mixed Culture ◽  
Pure Culture ◽  
Milk Fat ◽  
Mixed Cultures ◽  
Dairy Goats ◽  
Serum Parameters ◽  
Native Breed ◽  
Culture Duration ◽  
Inorganic Phosphorous

Rumen ciliates still have mysterious secrets and influences in ruminants. This study investigated the effect of transfaunation of pure and mixed cultures of rumen ciliates on physical clinical examination, selected serum parameters and milk profile in defaunated lactating dairy goats. A number of 8 Baladi native breed goats were randomly classified into two groups each one containing 4 goats. Pure culture group was transfaunated with 6 ml of pure culture of Holotricha spp., while mixed culture group was transfaunated with 6 ml of mixed culture of 81.85% Holotricha and 18.15% Ophryoscolex spp. once weekly for three consecutive weeks, after defaunation of both groups using 30 ml of 8% SLS for two consecutive days. Serum and milk samples were collected weekly for three successive weeks to study effect of type of ciliate culture, duration of transfaunation and their interaction. Results revealed that transfaunation of pure and mixed cultures of rumen ciliates had no effect on physical examination with minimal non-significant improvement of calcium, inorganic phosphorous, total protein and globulin in serum of defaunated goats. Transfaunation of pure or mixed cultures of rumen ciliates within three weeks could not improve significantly decreased milk fat % of defaunated goats without any effect on other measured milk profile parameters. It is concluded that further investigations on transfaunation without prior defaunation should be performed using different pure and mixed cultures of rumen ciliates for therapeutic and productive purposes.

Cometabolism in biofilm reactors

1995 ◽  
Vol 31 (1) ◽  
pp. 215-225 ◽  
Author(s):  
Gerald E. Speitel ◽  
Robert L. Segar
Keyword(s):  
Chlorinated Solvents ◽  
Packed Bed ◽  
Operating Conditions ◽  
Mixed Cultures ◽  
Treatment Technology ◽  
Hydraulic Residence Time ◽  
Slow Growth Rate ◽  
Biofilm Reactors ◽  
Aerobic Cometabolism ◽  
Degrading Bacteria

Aerobic cometabolism of chlorinated aliphatic solvents in biofilm reactors is a potential treatment technology for contaminated water and air streams. This research investigated cometabolism by pure and mixed cultures of methanotrophs and mixed cultures of phenol-degrading bacteria. Initial experiments with continuous-flow, packed-bed bioreactors proved unsuccessful; therefore, the major focus of the work was on sequencing biofilm reactors, which cycle between two modes of operation, degradation of chlorinated solvents and rejuvenation of the microbial population. Particular success was obtained with a mixed culture of phenol degraders in the treatment of chlorinated ethenes (e.g., trichloroethylene - TCE). Under the best operating conditions, 90% removal of TCE occurred at a 14-minute packed-bed hydraulic residence time. The bioreactors required only two, 1.5 h biomass rejuvenation periods per day to sustain this removal. Experiments with Methylosinus trichosporium OB3b were less successful because of the organism's slow growth rate, relatively poor ability to attach to surfaces, and its inability to successfully compete with other methanotrophs in the bioreactor environment. Overall, however, the research demonstrated the potential attractiveness of sequencing biofilm reactors in treating water contaminated with chlorinated solvents.

Inhibitions of cadmium and combined cadmium-copper on nitrification by attached and suspended growth mixed cultures containing ammonia oxidizing archaea

2017 ◽  
Vol 2017 (7) ◽  
pp. 4054-4059
Author(s):  
Dhritikshama Roy ◽  
Murthy Kasi ◽  
Chaiwat Rongsayamanont ◽  
John McEvoy ◽  
Eakalak Khan
Keyword(s):  
Mixed Cultures ◽  
Ammonia Oxidizing Archaea ◽  
Suspended Growth

Midbrain Neuron-glia Mixed Cultures

BIO-PROTOCOL ◽  
2012 ◽  
Vol 2 (7) ◽  
Author(s):  
Huiming Gao
Keyword(s):  
Mixed Cultures

scholarly journals Emission of carbonyl sulfide byThiobacillus thioparusgrown with thiocyanate in pure and mixed cultures

1993 ◽  
Vol 114 (2) ◽  
pp. 223-227 ◽  
Author(s):  
Yoko Katayama ◽  
Takahiro Kanagawa ◽  
Hiroshi Kuraishi
Keyword(s):  
Carbonyl Sulfide ◽  
Mixed Cultures
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