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 68 for “"specific growth rate"”.
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The Effect of Constant Relative Growth Rate Versus Constant Specific Growth Rate on Oocystis SP
… sp. (S002) was grown using two different growth strategies at three different temperatures (15°C, 20°C, 25°C). One strategy (GS1) kept a constant specific growth rate (µ) and the other (GS2) kept a constant relative growth rate (µ/µ<sub>max</sub>). In both strategies, the cultures were …
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Factors affecting the growth of Cladophora in relation to river pollution
Nuisance growths of Cladophora have been associated with eutrophication. A review of the literature, however, reveals a scarcity of relevant experimental growth studies. Sampling experimental streams reveals that the addition of sewage effluent to good quality water alters the flora from that …
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Increasing IFN-[gamma] productivity in CHO cells through CDK inhibition
… of research for many decades. The induction of growth arrest is one such area that shows particular promise. Through the use of siRNA and chemical cyclin dependent kinase (CDK) inhibitors, we have developed new methods to improve and better understand recombinant protein production during growth …
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The anti-fungal and anti-oxidant properties of polyphenols extracted from the resurrection plant, Myrothamnus flabellifolia
… the effects of M. flabellifolia polyphenols on growth of S. cerevisiae yeast strains was investigated. This study showed that M flabellifolia polyphenols inhibited growth of both the wild type and the Δhsp 12 yeast strains largely by binding protein in the growth medium. A decreased specific …
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Dissolution and Biokinetics of PCL in Denitrification Systems
… a modified Noyes-Whitney model, which was calibrated to capture the kinetics and predict carbon release over time. Many previous studies have overlooked the dissolution step, potentially leading to misinterpretations of rate limitation as low biological activity. Complementary biological …
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Biological Conversion Process of Methane into Methanol Using Mixed Culture Methanotrophic Bacteria Enriched from Activated Sludge System
… resulted in a notable enhancement of the growth kinetics. The attained maximum specific growth rate (max) (0.358 hr-1) and maximum specific methane biodegradation rate (qmax) (0.605 g-CH4,Total/g-DCW/hr-1) were the highest reported in mixed cultures. Furthermore, the maximum methanol …
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The Continuous Fermentation of Vinegar in Tower Fermenter
… continuous Tower fermentation system has been operated for the production of vinegar. Five different raw materials were investigated. These were: cocoa 'sweatings', a substrate derived from the cocoa fermentation 'sweat' boxes and is a highly polluting waste in the country oforigin; beet molasses, …
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Developments in anaerobic digestion modelling
… failure, anaerobic digesters are frequently operated far below their optimal level. In order to run a digester closer to capacity, a better understanding of AD failure is required. Under conditions approaching failure, or during startup, intermediate products such as acetate, propionate and …
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Investigating process stresses on Saccharomyces cerevisiae using isothermal microcalorimetry
… heat flows within a system i.e. it is non-specific. The literature demonstrates how IMC has been used in the study of numerous microbiological fields, including the growth and metabolism of yeast. Previous studies have successfully derived the specific growth rate and cell numbers of a …
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Variations of Vibrio Populations in Pacific White Shrimp, <i>Litopenaeus vannamei</i>, Aquaculture Raceways
… such as temperature, ammonia, nitrite, nitrate and phosphate. The total bacteria gene copy abundances were higher (<em>p</em> = 0.0081) in the low solids tanks but the quantity of <em>Vibrio</em> genus and <em>Vibrio parahaemolyticus</em> DNA copy numbers did not significantly differ …
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Aquaculture of Pacu (Piaractus mesopotamicus) and a Comparison of its Quality: Microbiological, Sensory, and Proximate Composition
… 36% (P36) protein diets for 24 weeks and their growth performance compared. Processing yields and proximate composition were determined following dressing of pacu. The microbiological quality of pond cultured pacu was compared to aquacultured hybrid striped bass, tilapia, and rainbow trout grown …
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Adattamento e acclimatazione a diverse temperature di lieviti psicrofili obbligati e facoltativi e di lieviti mesofili. Studio della produzione di acidi grassi polinsaturi omega-3 e omega-6 per via fermentativa.
… yeasts. Production of ω-3 and ω-6 polyunsaturated fatty acids by fermentative way. Obligate psychrophilic, facultative psychrophilic and mesophilic yeasts were cultured in a carbon rich medium at different temperatures to investigate if growth parameters, lipid accumulation and fatty acid …
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The development of filamentous fungi in submerged culture
… can have an important effect on the subsequent growth of filamentous fungi in submerged culture. This early phase of growth does not appear to have received much attention, and it was for this reason that the author's research was started. The aggregation, germination and early growth of the …
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An evaluation of carbon monoxide and methane as substrates for the denitrification of water
This study involved the use of soil and suspended growth microcosms to study the variation in groundwater denitrification rates using different substrates. Two gaseous substrates, carbon monoxide and methane, were studied and compared to a common liquid substrate, methanol. Denitrification with …
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Deammonification Process Kinetics and Inhibition Evaluation
… digested solids. This liquid, also knows as centrate, reject water or sludge liquor, can cause an increase of up to 25% in ammonia loading. The recently discovered anaerobic ammonia oxidation (anammox) process is a major breakthrough for treatment of these streams as it has the potential to …
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Determination of Biodegradation Kinetics of Select Pharmaceuticals and Personal Care Products in an Activated Sludge System through Respirometry
… acclimated to relatively high doses of PPCP substrates, those being greater than 100 μg/L. A series of tests were conducted using each substrate during the testing period. The kinetic parameters: yield (Y), half saturation coefficient (Ks), maximum specific growth rate (um), and maximum specific …
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Metabolic and Kinetic impacts of the auxiliary energy source in model chemolithoheterotrophic Bacteria
… gradient. This results in higher overall growth yields and maximum specific growth rates as the organism does not need to generate as many reducing equivalents to fuel the respiratory chain and can instead <br/>redirect that material into anabolic reactions to generate more biomass. Many …
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Pathway optimization and engineering for biofuel production
… The improved pathway was assessed based on specific growth rate on cellobiose, with the final mutant exhibiting a 42% increase over the wild-type pathway. Metabolite analysis of the engineered pathway presented a 54% increase in cellobiose consumption (1.68 to 2.82 g cellobiose/(L•h)) and a …
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The Fermentation of Cheese Whey by Lactobacilius helvecticus
… agent EDTA. Optimisation of L. helveticus growth in whey permeate was carried out using factorial design, as opposed to a traditional univariate approach. Using this technique, the variation of specific growth rate with pH, temperature and stiirer speed was assessed.<br/><br/>Cell growth …
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Evaluating the Use of Modified Corn Distillers Grains as a Fish-meal Protein Replacement in Yellow Perch Perca flavescens
… meal (FM) as a primary feed ingredient. Industry growth, high demand and increasing cost of finite FM supplies create urgency to find alternative protein sources. Plant products having sufficient nutrient composition and no anti-nutritional factors offer a viable alternative to conventional FM …
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