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 12 of 12 for “"Vegetative cell"”.
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An investigation of the physiological roles and enzymatic properties of invertases in tobacco and hybrid poplar
… the impacts of invertase mis-regulation on cellulose and lignin, the two most abundant biopolymers on earth, had not been conducted. Consequently, we investigated the effects of overexpressing yeast-derived invertases in tobacco and hybrid poplar. Transgenic tobacco expressing the …
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The effect of the CCI mutation on cell cycle morphogenesis in Paramecium Tetraurelia
… mutant is temperature sensitive and arrests the cell cycle at 34.4° C. The transition point for division under restrictive conditions defines the point of commitment to division. We have examined the point of commitment to division in relation to the time course of stomatogenesis and micronuclear …
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Detection of Clostridium Perfringens Enterotoxin and Its Relation to Sensory Quality of Cooked Chicken
… chicken thigh meat. With an inoculum of 10('6) vegetative cells per g, the vegetative cell counts rapidly reached mean log(,10) 7.32/g after 6 hrs of incubation. The counts remained in that range through 14 hrs of growth. A few heat-resistant spores (log(,10) 2.48/g) were first detected at 4 …
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Purification and properties of some fresh water and marine cyanobacteria belonging to the orders Chamaesiphonales and Pleurocapsales
… assignable to the genus Chamaesiphon, are unicellular cyanobacteria which reproduce by budding; the buds being formed in succession at one pole of the oval cell. These buds are the structures currently termed "exospores" by algologists. The other 32 strains, some marine and some fresh water, …
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Molecular analyses of YhcN/YlaJ and spore-associated proteins involved in germination of Bacillus cereus spores
… and biological factors that would kill their vegetative cellular counterparts. Bacillus cereus is one such spore-forming organism, and is a significant vector in food-borne toxigenesis. The spore form of the organism is important in surviving food processing procedures, but germination and …
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Response of indigenous heterotrophic groundwater bacteria to low organic substrate availability
… are atypically small, mostly Gram-negative cells. Also like the oceanic planktobacteria, they may have no affinity for surface attachment and may rely on dissolved low molecular weight organic substrates in dilute solution for their nutrition. Periods of metabolic dormancy may occur when …
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Characterization of the Bacillus anthracis SleL Protein and its Role in Spore Germination
… the bacterium can become a metabolically active vegetative cell. By exploiting cortex lytic enzymes it may be possible to control germination. This could be beneficial in elucidating ways to enhance current decontamination methods. In this work we created in-frame deletion mutants to study not …
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Biomineralization in cement based materials : inoculation of vegetative cells
… study undertaken to understand the influence of vegetative bacteria, specifically Sporosarcina pasteurii (S. pasteurii), when it is incorporated within cement paste. Vegetative S. pasteurii cells were suspended in a urea-yeast extract medium and this medium was mixed with cement. The influence of …
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INVESTIGATION OF UNIQUE COENZYME A BIOSYNTHETIC AND REDOX FUNCTIONS IN Bacillus anthracis
… as a new antimicrobial target. The intracellular cellular thiol-disulfide redox status of B. anthracis is maintained by coenzyme A-disulfide reductase (BACoADR), which catalyzes the NAD(P)H-dependent reduction of coenzyme A-disulfide (CoAD) to 2 CoASH. B. anthracis also contains an …
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The ecology of Bacillus thuringiensis on the phylloplane
… of Bacillus thuringiensis while it is in the vegetative as opposed to the spore form were developed. Using these media it was conclusively proved for the first time that B. thuringiensis can reside on the phylloplane in a metabolically active form. This was corroborated by evidence, also for …
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High resolution palaeoceanography and palaeoclimatology from mid and high latitude Late Cretaceous laminated sediments
… consists of alternating diatom resting spore and vegetative cell laminae (often dominated by Hemiaulus), interpreted to represent spring bloom flux and ‘fall dump’/intermittent summer blooms flux, respectively. Near-monospecific Rhizosolenia laminae frequently occur above vegetative laminae, …
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Characterization of two Bacillus subtilis penicillin-binding protein-coding genes, ykuA (pbpH) and yrrR (pbpI)
… (PBPs) are required in the synthesis of the cell wall of bacteria. In Bacillus subtilis, PBPs play important roles in the life cycle, including both vegetative growth and sporulation, and contribute to the formation of the different structures of vegetative cell wall and spore cortex. The B. …