Global linearization and control of a mixed-culture bioreactor with competition and external inhibition

1986 ◽  
Vol 82 (1) ◽  
pp. 43-62 ◽  
Author(s):  
Karlene A. Hoo ◽  
Jeffrey C. Kantor
Keyword(s):  
Mixed Culture ◽  
External Inhibition ◽  
Global Linearization ◽  
And Control

Dynamics and control of an activated sludge process as a mixed culture system

AIChE Journal ◽  
1984 ◽  
Vol 30 (3) ◽  
pp. 368-376 ◽  
Author(s):  
Takeichiro Takamatsu ◽  
Suteaki Shioya ◽  
Hirokazu Kurome
Keyword(s):  
Activated Sludge ◽  
Mixed Culture ◽  
Culture System ◽  
Activated Sludge Process ◽  
Dynamics And Control ◽  
And Control

scholarly journals Glyphosate Degradation by Two Plant Growth Promoting Bacteria (PGPB) Isolated from Rhizosphere of Maize

2019 ◽  
pp. 1-11 ◽  
Author(s):  
E. Ezaka ◽  
A. K. Akintokun ◽  
P. O. Akintokun ◽  
L. B. Taiwo ◽  
A. C. O. Uthman ◽  
...  
Keyword(s):  
Pseudomonas Aeruginosa ◽  
Plant Growth ◽  
Bacillus Cereus ◽  
Mixed Culture ◽  
Degradation Products ◽  
Polluted Soil ◽  
Plant Growth Promoting Bacteria ◽  
Plant Growth Promoting ◽  
Growth Promoting ◽  
And Control

This study was aimed at evaluating the possible utilization of glyphosate tolerant plant growth promoting bacteria (Pseudomonas aeruginosa and Bacillus cereus) for bioremediation of glyphosate polluted soil. The soil samples were spiked with 3.1 mg/ml, 7.2 mg/ml and 14.4 mg/ml of glyphosate and then inoculated with Pseudomonas aeruginosa and Bacillus cereus, level of glyphosate pollution before and after inoculation with the bacteria were determined using Gas Chromatography-Mass Spectroscopy (GC-MS) after extraction with acetonitrile. The bacteria showed significant ability to degrade glyphosate. Pseudomonas aeruginosa, Bacillus cereus, their mixed culture and control recorded percentage degradation of 76.11, 85.8, 75.8 and 49%, respectively at 3.1 mg/ml of glyphosate while At the concentration of 7.2 mg/ml, the percentage degradation by P. aeruginosa, Bacillus cereus, mixed culture of the isolates and control was 84.9, 72.7, 66.4% and 39.2%, respectively. The isolates also showed significant rate of degradation at the concentration of 14.4 mg/ml. The GC-MS results showed a significant variation in the degradation products obtained when compared with control. This study revealed that substantial amount of glyphosate was degraded by P. aeruginosa and Bacillus cereus. Hence, they may have great potential in bioremediation of glyphosate polluted soil.

MIXED CULTURE OF METHYLOTROPHIC BACTERIA METHYLOPHILUS QUAYLEI AND METHYLORUBRUM EXTORQUENS PRODUCES POLY-3-HYDROXYBUTYRATE AND EXOPOLYSACCHARIDE

2021 ◽  
Vol 1 (19) ◽  
pp. 280-282
Author(s):  
D.S. Dzhulay ◽  
E.R. Mitina ◽  
A.B. Pshenichnikova
Keyword(s):  
Mixed Culture ◽  
Methylotrophic Bacteria ◽  
Aerobic Methylotrophic Bacteria ◽  
Pure Cultures ◽  
And Control

The conditions for cocultivation of aerobic methylotrophic bacteria Methylophilus quaylei and Methylorubrum extorquens and control of the content of individual strains in the consortium were optimized. It was shown that the production of exopolysaccharide and poly-3-hydroxybutyrate in a mixed culture is close to their production by pure cultures of M. quaylei and M. extorquens, respectively.

scholarly journals Performance of single and mixed rhizobial inoculants on nodulation, dry matter and seed yield of lentil (Lens culinaris)

2014 ◽  
Vol 39 (1) ◽  
pp. 105-112
Author(s):  
MAH Bhuiyan ◽  
D Khanam ◽  
MT Rahman ◽  
MHR Sheikh ◽  
MMH Bhuiyan
Keyword(s):  
Mixed Culture ◽  
Seed Yield ◽  
Lens Culinaris ◽  
Field Experiments ◽  
Agricultural Research ◽  
Research Station ◽  
Rhizobium Strains ◽  
Uninoculated Control ◽  
Seed Yields ◽  
And Control

Field experiments were carried out at Regional Agricultural Research Station (RARS), Ishurdi, Pabna during the rabi season of 2005-06 and 2006-07 to find out the effectiveness of Rhizobium strains for achieving higher yield of lentil, the variety BARI Masur–4. There were six treatments that were Rhizobium strains- BARI RLc-104, BARI RLc-105, BARI RLc-106, BARI RLc–107, mixed culture of the four strains, and control (no Rhizobium). The experiment was designed in randomized complete block having 4 replications of each treatment.The rhizobial inocula were peat based and used @ 1.5 kg/ha. A basal dose of P @ 22 kg/ha, K @ 42 kg/ha, S @ 20 kg/ha, and @ 5 kg Zn/ha was used for all treatments. The highest nodule number (11.7/plant in 2006 and 10.3/plant in 2007) and dry nodule weight (10.53 mg/plant in 2006 and 9.58 mg/plant in 2007) were found with mixed culture. Mixed culture produced the highest seed yield in 2006 (1.36 t/ha, 37.4% higher over uninoculated control) and in 2007, BARI RLc-104 recorded the highest seed yield (1.23 t/ha, 60.3% higher over uninoculated control). However, all the strains including mixed culture had similar seed yields over the years. DOI: http://dx.doi.org/10.3329/bjar.v39i1.20147 Bangladesh J. Agril. Res. 39(1): 105-112, March 2014

scholarly journals Plant-Wide Systems Microbiology for the Wastewater Industry

2021 ◽  
Author(s):  
Marta Cerruti ◽  
Bing Guo ◽  
Robert Delatolla ◽  
Nadieh de Jonge ◽  
Aleida Hommes - de Vos van Steenwijk ◽  
...  
Keyword(s):  
Wastewater Treatment ◽  
Microbial Communities ◽  
Microbial Ecology ◽  
Environmental Protection ◽  
Mixed Culture ◽  
Resource Recovery ◽  
Microbial Processes ◽  
Monitoring And Control ◽  
Bioprocess Design ◽  
And Control

The wastewater treatment sector embraces mixed-culture biotechnologies for sanitation, environmental protection, and resource recovery. Bioprocess design, monitoring and control thrive on microbial processes selected in complex microbial communities. Microbial ecology...

Pategrás cheese as a suitable carrier for six probiotic cultures

2010 ◽  
Vol 77 (3) ◽  
pp. 265-272 ◽  
Author(s):  
Carina Bergamini ◽  
Erica Hynes ◽  
Carlos Meinardi ◽  
Viviana Suárez ◽  
Andrea Quiberoni ◽  
...  
Keyword(s):  
Shelf Life ◽  
Mixed Culture ◽  
Cell Concentration ◽  
Probiotic Bacteria ◽  
Single Strain ◽  
Respective Control ◽  
Cheese Ripening ◽  
Direct Addition ◽  
And Control

The viability of five single-strain and one three-strain probiotic cultures was assessed during Pategrás cheese ripening. Probiotics were inoculated into cheese-milk after a pre-incubation step – intended to improve their survival – or directly as a lyophilised culture; control cheeses without probiotics were also obtained. pH of probiotic and control cheeses was similar, except in probiotic cheeses containing the strain Lb. acidophilus B or the mixed culture. In these cases, the probiotic cheeses were more acid than their respective control cheeses. All the probiotics tested maintained counts above 107 cfu/g during the shelf-life settled for the product. Strains of the Lb. casei group: Lb. paracasei, Lb. casei and Lb. rhamnosus reached and kept the highest cell concentration during cheese ripening, followed by Lb. acidophilus and bifidobacteria. The direct addition of the probiotic cultures was more efficient than their inoculation after a pre-incubation step, for all the probiotics assayed. We have provided evidence that support the use of Pategrás cheese as a performing food-based vehicle for probiotic bacteria.

Control of Metal Alloy Oxidation with Electric Fields

1973 ◽  
Vol 31 ◽  
pp. 164-165
Author(s):  
R. R. Dils ◽  
P. S. Follansbee
Keyword(s):  
Electric Fields ◽  
Oxidation Process ◽  
Base Alloy ◽  
Oxide Surface ◽  
Platinum Electrodes ◽  
Insulating Layer ◽  
Iron Base Alloy ◽  
Alloy Oxidation ◽  
Aluminum Oxide Layer ◽  
And Control

Electric fields have been applied across oxides growing on a high temperature alloy and control of the oxidation of the material has been demonstrated. At present, three-fold increases in the oxidation rate have been measured in accelerating fields and the oxidation process has been completely stopped in a retarding field.The experiments have been conducted with an iron-base alloy, Pe 25Cr 5A1 0.1Y, although, in principle, any alloy capable of forming an adherent aluminum oxide layer during oxidation can be used. A specimen is polished and oxidized to produce a thin, uniform insulating layer on one surface. Three platinum electrodes are sputtered on the oxide surface and the specimen is reoxidized.

Sign in / Sign up

Export Citation Format

Share Document