Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 56 for “"Batch culture"”.
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Ruminal degradation of protein and carbohydrate using a batch culture system, and response to roughage removal, rumen modifier inclusion and postruminal amino acid supply in feedlot cattle
… and carbohydrate ruminal degradation using a batch culture system, demonstrate and responses to roughage removal, rumen modifiers inclusion and postruminal amino acid supply in feedlot cattle. The objective of the first study was to characterize rumen N, starch, and NDF degradation rate …
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Studies on survival of Pseudomonas aeruginosa 6750
… were focused on the survival of P.aeruginosa in batch and chemostat studies. Survival or percentage culturability, as measured by total and colony count ratio, was found to decrease both in extended batch culture and for chemostat cells with decreasing growth rate. Extended batch culture, …
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Evaluation of the Redostat™ device for the study of ferrous iron biological oxidation kinetics.
… iron biological oxidation kinetics, namely batch and continuous culture techniques. However, the continuously changing conditions in batch culture and the slowness and bacterial wash out in continuous culture are significant weaknesses for these experimental methods. This work has evaluated …
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The microbiology of mining leach liquor regeneration
… by the inorganic ions present in T. ferrooxidans culture medium. The effect of ferrous iron concentrations and mixtures of ferrous and ferric irons on the rate of iron oxidation by T. ferrooxidans in batch culture was determined. The exponential iron oxidation rate was not affected by the ferric …
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Guanosine 5'-diphosphate 3'-diphosphate (ppGpp), guanosine 5'-diphosphate 3'-monophosphate (ppGp) and antibiotic production in Streptomyces clavuligerus
… laboratory scale fermenters using continuous and batch culture methods. Cephamycin C was produced in all fermentations. Clavulanic acid was produced in carbon- and nitrogenlimited continuous culture and in carbon- and phosphate-limited batch culture. Low levels of intracellular guanosine …
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The regulation of division of higher plant cells
… L (English sycamore) cell suspension cultures provide an excellent system for controlled investigations into the regulation of cytokinesis. They exhibit 60-70% division synchrony on subculture, and produce predictable growth patterns in batch culture. Previous studies in these …
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Hydrogen production via dark fermentation of carbohydrate-rich substrates
… from two energy crops, grass and fodder maize in batch culture without pretreatment; investigated the effect of increase in substrate (sucrose) concentration, attractive from an energy point of view, on the yield and stability of hydrogen production in continuous culture; examined the performance …
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Architecture and evolutionary stability of yeast signaling pathways
… I performed experiments in both continuous and batch culture to demonstrate this effect. I then characterized the decay of the pheromone response pathway first, by measuring its mutation rate and second, by measuring the fitness of a series of strains with pheromone response gene deletions. I …
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Development of an eicosapentaenoic acid production bioprocess using an indigenous microalgal isolate
… and Industrial Research (CSIR) micro-algal culture collection. A Cymbella diatom (A23.2) was selected for superior EPA production in both growth and stress conditions, using both fluorescent microscopy and flask studies. Studies investigated increasing biomass, improving EPA content, and …
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An investigation into the use of batch experiments in the determination of the kinetics of ferrous-iron oxidation by Leptospirillum ferrooxidans
… oxidation by Leptospirillum ferrooxidans in batch culture and compare these results with those previously obtained in continuous culture. An additional objective was to assess the validity of a variable maintenance equation by a re-evaluation of previously published literature and to evaluate …
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The effects of nutrient limitation and growth rate on the regulation of the multi-drug pump genes acrAB in escherichia coli
… studies and it has been established by chemostat culture that the expression of acrAB was inversely related to growth rate, and this was irrespective of the limiting nutrient. This regulation was not OS_dependent as the expression of acrAB increases during stationary phase in the batch culture of …
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The kinetics of ferrous iron oxidation by Leptospirillum-like bacteria in absence and in presence of pyrite and pyrite/arsenopyrite mixtures in continous and batch cultures
… of ferric iron was determined in a continuous culture with a feed solution of 12 g· l-1 ferrous iron. The pyrite and pyrite/arsenopyrite leaching in presence of bacteria was followed in a batch culture whereby in the exponential growth phase pyrite, resp. pyrite/arsenopyrite was added in …
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Degradation of tertiary butyl alcohol by a Pseudomonas sp. isolated from groundwater
… was 7.0. The organism grew faster in continuous culture when TBA was the sole carbon source with a doubling time 33.6 h. The doubling time in batch culture was 112.3 h. When yeast extract was added to a mineral salts + TBA medium to concentrations greater than 1 mg/ml, TBA degradation was …
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In vitro examination of the effect of orlistat on the ability of the faecal microbiota to utilize dietary lipids
… to these GI disturbances. Using in vitro batch culture and human gut model systems, studies were conducted to determine whether increased availability of dietary lipids and/or orlistat affect the composition and/or activity of the faecal microbiota. Results from 24-h batch culture …
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In vitro examination of the effect of orlistat on the ability of the faecal microbiota to utilize dietary lipids
… to these GI disturbances. Using in vitro batch culture and human gut model systems, studies were conducted to determine whether increased availability of dietary lipids and/or orlistat affect the composition and/or activity of the faecal microbiota. Results from 24-h batch culture …
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The Effects of Starvation on The Ruminal Bacteria Megasphaera Elsdenii and Selenomonas Ruminantium
… organic nutrient starvation after growth in batch and/or continuous culture. Both organisms exhibited a very limited survival capacity in comparison to other bacteria reported in the literature. This capacity appears to have been at least partially influenced by pre-starvation growth …
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Development of in vivo ppGpp reporters in escherichia coli
… light on the dynamics of ppGpp production during batch culture growth and under nutrient limitation. With further development, these in vivo ppGpp reporters promise to be very useful when studying the dynamics of host resource partitioning.
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Entwicklung von Labormethoden zur Prognose des mikrobiellen Selbstreinigungspotentials kontaminierter Grundwässer und Böden
… and increase of organic acids as metabolits. In batch-culture with groundwater a decrease of contaminants was proved, in the soil suspension however the fate of the xenobiotica after an incubation over 400 days could not be determined. The comparison with batch-cultures as soil suspension or with …
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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 estimate …
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Hormone Binding In Plants
… and auxin-independent strains of suspension-cultured Acer pseudoplatanus L. cells. Parameters studied included growth characteristics, auxin concentration and compartmentation, carrier mediated auxin transport, and cytoplasmic/nuclear binding site (receptor) mediated auxin perception and …
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