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 563 for “"enzyme activity"”.
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Characterizing peptide-modifying enzyme activity in RiPP biosynthesis
… products. These dedicated peptide-modifying enzymes install heterocycles, macrocycles, acyl groups, halogens, and other moieties to endow biological functions and provide their producing organisms an evolutionary advantage. This thesis focuses on mechanistic and functional studies of such …
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Microfluidic concentration-enhanced single cell enzyme activity assay
… using signaling networks regulated by enzymatic activity of various proteins. Aberrations in signaling are associated with diseases such as cancer. Most current methods lack the sensitivity to measure enzymatic activity in single cells and instead measure the average of large cell populations. …
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The Effect of Hydration on Enzyme Activity and Dynamics
… studies have established a correlation between enzyme activity and hydration level. While a threshold of hydration of 0.2 h (grams of water per gram of dried protein) is usually accepted for the onset of enzyme activity, recent works show that enzyme activity is possible at water contents as low …
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Cellulase and related enzyme activity in protoplasts and mycelium of filamentous fungi.
… and soluble carboxymethyl cellulose and their enzyme complements were characterised under various growth conditions. The factors affecting the production and release of protoplasts from the closely related A. fumigatus and A. niger and P. ochrochloron and G. emersonii were investigated. …
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Lysosomal enzyme activity in normal and pale, soft and exudative porcine muscle
Thesis (M.S.)--Michigan State University. Dept. of Food Science, 1969
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Effects of road salt on photosynthetic and enzyme activity of stream biofilms
… influence on periphyton. I measured extracelluar enzyme activity and photosynthetic activity of natural winter stream periphyton communities under various short-term laboratory salt exposures. The results of this study suggest that short-term exposure to increased concentrations of salt did not …
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Investigating the enzyme activity of a <i>Clostridioides difficile</i> amidase complex
… While the endospore cortex is forming, the enzymes CwlD and PdaA convert N-acetylmuramic acid (NAM) into muramic--lactam (MAL). MAL serves as a recognition element for germination-specific lytic enzymes that degrade cortex peptidoglycan layers during germination. Without the MAL residues the …
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Effect of germination and drying on enzyme activity in sorghum and cowpeas
… β-amylase and endo-(1,3)(1,4)-β-D-glucanase activity. Germination had a highly significant effect on enzyme activity (P < 0.01). However, cowpea endo-(1,3)(1,4)-β-D-glucanase was not significantly affected by the combined action of germination and drying. β-Amylase was not detected in any of …
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Oxidative Enzyme Activity in the Kidney of Rats and Hibernating and Non-hibernating Hamsters
… related species can not. Levels of oxidative enzymes, oxidative phosphorylation efficiency, and in vitro responses of various tissues or enzymes to temperature are among the possible potential mechanisms which have been investigated.
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Novel applications and methods for the computer-aided understanding and design of enzyme activity
… of computer-aided tools for engineering enzymes for a vast array of industrial applications. rational enzyme design remains an ongoing challenge in biotechnology. This thesis presents a set of novel applications and methods for the computer-aided understanding and design of enzyme …
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Soil phosphatases: factors affecting enzyme activity in Arctic tussock tundra and Virginia mineral soils
… orthophosphate on abiontic phosphomonoesterase activity was examined in disturbed and undisturbed Arctic soils with variable moisture content and in Virginia forest, grassland and agricultural soils. Distribution of acid and alkaline phosphatases was related to soil pH. The pH optimum for enzyme …
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Time And Rate Of Nitrogen Fertilization Influence Maize Nitrogen Use Efficiency And Soil Enzyme Activity
… N rates maximized nutrient uptake. Soil enzyme activity fluctuated across the growing season and decreased over time, particularly in the coarse-textured soils at Becker. Although microbial activity declined annually, there was no significant change in glucosidase activity. There was a …
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Bacterial Assemblages And Microbial Enzyme Activity In The Major Tributaries Of The Lower Mississippi River
… these communities using assays of extracellular enzyme activity. A total of 715,120 valid bacterial 16s rrna sequences were classified into 30,211 operational taxonomic units (otus), although many of these otus were of very low proportional abundance. The most abundant individual otu was …
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Effects of dietary heated fats and cyclic fatty acid monomers on rat liver enzyme activity
… and of cyclic fatty acids (CFA) on rat liver enzyme activity. The fats were partially hydrogenated soybean oil (PHSBO) used 4 days (4-MH) and 7 days (7-DH) for frying foodstuffs. Balanced diets containing these used fats were fed to rats for 10 weeks. In a second experiment, rats were pair-fed …
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The effects of light level and temperature on freshwater microbial biomass, production, enzyme activity, and community composition
… the presence of light, as were some periphytic enzyme activities. Few response variables increased in a near-linear fashion with ascending temperature, suggesting different temperature optima. The strength of heterotrophic microbial production responses to algal photosynthesis did not vary with …
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Pancreatic Ribonuclease Functions As An Epidermal Growth Factor Receptor Ligand Independently of Its Enzyme Activity and Contributes to Cetuximab Resistance
<p>Ribonuclease (RNase) with its catalytic enzyme activity to degrade RNAs has been shown as a diagnostic serum marker for pancreatic cancer and has also been suspected to have an unidentified cell surface receptor. Epidermal growth factor receptor (EGFR), a well-characterized receptor tyrosine …
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Normal Glycolytic Enzyme Activity Is Critical For Hypoxia Inducible Factor-1A Activity and Provides Novel Targets For Inhibiting Tumor Growth
<p>Normal Glycolytic Enzyme Activity is Critical for Hypoxia Inducible Factor-1α Activity and Provides Novel Targets for Inhibiting Tumor Growth</p> <p>By Geoffrey Grandjean</p> <p>Advisory Professor: Garth Powis, D. Phil</p> <p>Unique to proliferating cancer cells is the observation that their …
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