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 70 for “"Lag phase"”.
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Stress resistance during the lag phase of wine fermentation and development of optimized yeasts
… multi-stress resistance during wine fermentation lag phase. We first characterized a set of commercialized wine yeast strains by focusing on stress factors typically found at this stage in red wines and in white wines. Temperature and osmotic stress had a drastic impact in lag phase for all …
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Functional Genomics and physiology of growth initiation in Salmonella
Abstract Lag phase is a period of bacterial adaptation that occurs prior to cell division. The aim of this project was to characterise the processes used by Salmonella enterica serovar Typhimurium to escape from lag phase, and determine whether these processes are dependent on the bacterial …
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The anti-fungal and anti-oxidant properties of polyphenols extracted from the resurrection plant, Myrothamnus flabellifolia
… rate, reduced maximum biomass, and prolonged lag phase were observed for both strains.
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An investigation into the effects of preleach time period, nitrogen supplementation and iron concentration on bioleaching performance
… ores due to the ever increase in demand. A lag phase is present during the start-up phase of heap bioleach operations characterised by a low degree of microbial colonisation, a low ferrous iron oxidation rate and low microbial proliferation rates, ultimately resulting in a poor copper …
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Superoxide Dismutase Activity During Thermal Stress and Recovery of Staphylococcus Aureus
… MF-31, the SOD activity decreased during the lag phase, paralleled a concurrent increase in cell counts during the logarithmic phase and became constant in the stationary phase. The SOD activity during the stationary phase of S. aureus strains 196E and 210 was approximately 80% greater than …
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Nitrate reductase in apple trees
… least 60 minutes following an initial 30 minute lag, whereas there was no lag phase in root tissues.
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Optimisation of small scale anaerobic digestion technology
… AD of CFW and the result showed that microbial lag phase reduced by 50% which was attributed to sorption of limonene compound and biofilm formation on the biochar material. The study on AD of CFW at a different operating temperature of 35-55 ⁰C showed that the higher temperature of 45 and 55 ⁰C …
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CAPSULAR DEVICES FOR ORAL MODIFIED RELEASE OF DRUGS PREPARED BY INJECTION MOLDING
… other. In this respect, the modulation of the lag phase of the capsular device and its possible exploitation in the design of a colon DDS were approached.
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The Effects of Diazinon on the Growth Rates and Population Dynamics of Planktonic Algae and the Possible Uptake By Two Algal Species
… Synechococcus showed a significant increase in lag phase. Results of the investigation on the population dynamics of a natural assemblage of phytoplankton revealed that as Diazinon levels increased, species diversity decreased. Complete inhibition of the blue-green component and the apparent …
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Antioxidant activity of Mn-salophen complex and its effects on antioxidant enzymes in Escherichia coli
… <i>sodA sodB</i> grew scantily after an 8 hour lag phase in aerobic M63 glucose minimal medium.
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African starchy foods, gastric emptying, and starch digestion in Malian stunted children
… to rice, potatoes, and pasta as measured by lag phase and half-emptying time (<em> P</em> < 0.0001). Factors that regulate gastric emptying of an ingested food are of interest since their understanding may help in controlling overall energy intake. In a second study, Polycose<sup>®</sup> …
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The effect of oxidation-reduction potential on the outgrowth and chemical inhibition of Clostridium botulinum type E spores
… and sucrose (30% and 35%) revealed an increased lag phase and a decreased maximum absorbance for growth in the oxidized medium compared to growth in the reduced medium. Media poised by dissolved oxygen also exhibited retarded growth when compared to the reduced media. The addition of exogenous …
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Tau aggregation is heterogeneous across cases of sporadic Alzheimer's disease and is influenced by autophagy pathways in vitro
… of aggregates was a logistic process, with a lag phase, an exponential rise phase, and a plateau phase. Aggregation kinetics varied significantly between different cases of sporadic Alzheimer's disease, paralleling the heterogeneity that is observed in the clinical presentation of Alzheimer's …
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Insights into the ecophysiology and biophysics of microbes involved in fermentation
… species of bacteria indicate that the microbial lag phase, which is often regarded as an indicator of cellular stress, is in reality often inconsistent with the level of stress.<br/><br/>The work carried out here also produced a novel assay in which to investigate the effect glycerol has on the …
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Avaliação da produção de hidrogênio e metano a partir da codigestão anaeróbia de resíduos
… and methane through anaerobic codigestion in two phases (acidogenesis and methanogenesis) of organic waste (OW), sewage sludge (SS) and raw glycerol (GL), was investigated in batch assays under temperature controlled conditions. The effect of glycerol addition (1 and 3% v/v) as cosubstrate was …
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Ruminal degradability of subfractions of protein sources as determined by gel electrophoresis
… Holstein cows consuming a diet of corn silage, alfalfa, soybean, and high moisture corn were used. Degradability of protein varied from 18.6% for corn gluten meal to 72.3% for soybean meal. Gel electrophoresis was used to monitor rates of degradation in the rumen of fractions of corn …
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IMPROVING THE CIRCULARITY OF BIODEGRADABLE BIOPLASTICS BY PRODUCING BIOGAS: A FULL-SCALE ASSESSMENT
… 27 to 47 NL kgVS−1 d−1, with a reduction in the lag phase by 5 days. This enhancement was linked to the enrichment of the PLA-degrading bacteria Tepidanaerobacter. While in PLA + OFMSW co-digestion, biogas production increased by 69% (827 ± 69 NL kgVS−1), the biogas production rate increased to …
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Development of a T-Loop Assay to Investigate T-Loop Dynamics and Structure
… has yet to be fully realized due to the lag phase between the times in which telomerase is inhibited and the times that telomeres become sufficiently short that the tumor undergoes apoptosis. Thus, improvements are needed including a greater understanding in t-loop dynamics and the …
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Pseudomonas chlororaphis (pJP4) als effizienter Rhizosphäre-Kolonisierer: Untersuchung fitness-relevanter Faktoren und Etablierung einer in situ-Detektionsmethode
… Derivate wiesen eine stark verkürzte Lag-Phase und eine reduzierte Produktion des für die stationäre Phase spezifischen Sigmafaktors Rpos auf. Dies führte nach Koinokulation mit anderen Bakterien offenbar zu einer Aufhebung des selektiven Nachteils. Vermutlich nutzen die gacS-negativen …
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Impact of cryoprotectants during freeze drying on Lactobacillus plantarum viability and their role in enhancing probiotic storage stability
… growth kinetic parameters (growth rate, lag phase, and maximum cell density), and pH reduction potential of L. plantarum. Improved survival of L. plantarum during freeze drying and over 12-weeks of storage was observed with all cryoprotectants. Skimmed milk demonstrated the highest …
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