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Showing 1 to 20 of 48 for “"Mixed cultures"”.
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Growth in mixed cultures of microorganisms
… the number of the microorganisms grown in mixed cultures. Size distribution curves were prepared and used as a means for determining the Coulter Counter settings for counting each organism. Coulter Counter counts were compared with Petroff-Hausser counts; the results showed approximately 20 …
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The selective stimulation of respiration in mixed cultures of bacteria and protozoa
… the selective stimulation of respiration in the cultures of bacteria and protozoa, as found in a typical domestic waste water, was conducted in the Sanitary Engineering and Science Laboratory of The Rice Institute during the 1958-59 academic year. These studies were part of a broad investigation …
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Sanitizer efficacy towards attached bacteria in a simulated milk pipeline system using pure and mixed cultures
… and Teflon® gasket surfaces in either pure or mixed cultures. Differences in initial attachment rates were evident in a mixed culture of P. fluorescens, Y. enterocolitica, and Listeria monocytogenes in vitro. Sanitizer effectiveness depended upon the bacterium being enumerated, the type of …
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Functional genomics analysis of carbohydrate conversion to biohydrogen by pure and mixed cultures of hyperthermophilic Thermotoga species.
… cDNA microarray for use in pure and mixed culture transcriptional response studies. The Thermotoga multi-species cDNA microarray was used to examine pure and mixed culture transcriptomes for growth on glucose and on a polysaccharide mixture. The multi-species array was used to …
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Growth of mixed cultures of moderate thermophiles for commercial heap bioleaching of low-grade copper-sulphide ores
… could affect the micro-organisms in the stock cultures. This study focused on investigating the growth of bioleaching micro-organisms at 50°C, a moderate thermophilic temperature. This temperature is of particular interest as a ramping temperature from ambient to thermophilic temperatures. It …
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Effects of Protected Fat When Fed to Dairy Cattle and the Interaction Between Supplemental Fat and Antibiotics in Mixed Cultures.
… of butyrate was higher (P <0.01) in cultures treated with monensin when compared with cultures treated with bacitracin. The proportion of C 18:2 in rumen bacteria increased (P <0.05) when monensin was added prior to fat in comparison to when fat was added prior to monensin. …
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Molecular ecology of plant cell wall hydrolysis by mixed cultures of Ruminococcus albus 8, Ruminococcus flavefaciens FD-1 and Fibrobacter succinogenes S85
… 1991) also were used. Bacteria were grown as monocultures, dicultures and in triculture on cellobiose, cellulose and alkaline hydrogen peroxide-treated wheat straw to study competition among the three bacterial species on these substrates. The cellubiose-grown cultures were incubated at …
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Nitrogen Fixation By Azotobacter Species In Mixed Culture
… ammonia will accumulate in the medium of pure cultures of Azotobacter vinelandii until levels become high enough to repress nitrogenase synthesis. A. vinelandii and A. chroococcum were grown in mixed culture with yeasts and bacterial soil isolates in a nitrogen free medium. It was theorized …
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Substrate Specificity and Molecular Characterization of PAH-Degrading Anaerobic Enrichment Cultures Under Methanogenic Conditions
… this lab has cultivated enriched anaerobic mixed cultures capable of degrading the low-molecular-weight polycyclic aromatic hydrocarbons (PAHs), naphthalene or phenanthrene, as a sole carbon source. Characterization of the enrichment cultures by 16S rDNA analysis revealed two unique …
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Strategies to detoxify the mycotoxin deoxynivalenol and improve food safety in the U.S.
… about mycotoxins in food. In Objective 1, two mixed cultures were identified from environmental samples that converted DON into the less toxic 3-keto-deoxynivalenol (3-keto-DON). In Objective 2, a CFPS system was used to express three known acetyltransferase genes to convert DON to 3-acetyl-DON …
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Bacterial coagulation by a chlorinated solvent
… time increased the percent removal of pure cultures. 3. The solvent coagulation process worked best at a pH very near the pH produced by the bacteria during growth. 4. There was no advantage in changing from room temperature. S. proper surface active agents aided in the coagulation of …
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The effect of simazine on nitrification and the decomposition of simazine by soil microorganisms
… inhibitory effect on nitrification in pure and mixed cultures of the nitrifying bacteria. Simazine concentrations of 6 and 9ppm inhibited the rate of nitrification in soil perfusion units, and an abnormally high level of nitrite nitrogen was observed in the herbicide treatments. The herbicide …
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ΟΙ ΣΥΝΕΠΕΙΕΣ ΤΗΣ ΕΚΦΡΑΣΗΣ ΤΗΣ ΠΡΩΤΕΙΝΗΣ Ρ21 ΓΟΝΙΔΙΑΚΟΥ ΠΡΟΙΟΝΤΟΣ ΤΟΥ ΟΓΚΟΓΟΝΙΔΙΟΥ Η-RAS1 ΚΑΤΑ ΤΗΝ ΚΑΡΚΙΝΟΓΕΝΕΣΗ
… WAS RAS P21WAS DETECTED. ALSO WERE INVESTIGATED MIXED CULTURES OF NORMAL EARLY PASSAGE BALB/C EMBRYO CELLS AND BALB/C 3T3 CELLS TRANSFORMED BY THE HUMAN T24 H-RAS ONCOGENE. THE PRESENCE OF AN EXCESS OF NORMAL CELLS COULD SUPPRESS THE PHENOTYPE OF TRANSFORMED CELLS IN VITRO. A SIMILAR TYPE OF …
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Characterizing bacterial diversity in undefined dairy starter cultures used for Cheddar cheese production
Mesophilic mixed cultures commonly used in Cheddar cheese production contain a mix of Lactococcus lactis subspecies cremoris and subspecies lactis. To explore microbial diversity of Cheddar cheese starter mixtures, the community dynamics within nine undefined starter mixes were determined by 16S …
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Biological Conversion Process of Methane into Methanol Using Mixed Culture Methanotrophic Bacteria Enriched from Activated Sludge System
… were the highest reported in mixed cultures. Furthermore, the maximum methanol productivity achieved is comparable with pure cultures and equal to 211581 mg/L/day. Whereas, methanol concentration of 48521 mg/L was attained which is two times higher than the reported using mixed …
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The physiology of the genus bacillus
… organisms in pure laboratory culture and also in mixed cultures in the natural habitat.
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Disruption of microorganisms due to agitation in slurries of fine particles
… in stirred tanks is the biooxidation process. Mixed cultures of thiobacilli are used in stirred tank reactors for the biooxidation of sulphide minerals. In addition to operating conditions, the efficiency of biotechnological processes is dependent on the growth and metabolism of the …
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Functional genomic and transcriptomic tools for spatial and dynamic phenotypes
… screening to quantify cell-cell interactions in mixed cultures with primary neurons and reveal functional interaction partners of synaptogenic cell adhesion molecules. Using these screens, we identified differential modulators of excitatory and inhibitory synapse formation, implicating diverse …
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A study of treponemal antigens
… of oral treponemes that were in either pure or mixed cultures. T. denticola cells were found to bind to fibronectin-coated microscope slides. Proteins, that bind fibronectin, in the Triton-extracts of T. denticola, were detected in a fibroectin-captured ELISA. The Triton-extracts also reacted …
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Microbial Biofilm Development and Electron Transfer in Electrochemical Systems
… and motility-impaired mutant strains, as well as mixed cultures found in wastewater treatment plants. This was done with an effort to develop improved electrode materials by studying structure-to-property relationships. 3D morphological features of biofilms that were directly linked to functional …
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