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Showing 1 to 20 of 243 for “"catalase"”.
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Catalase, Superoxide Dismutase, and Staphylococcus Aureus Virulence
… was to investigate the relationship between catalase and superoxide dismutase (the enzymes that degrade hydrogen peroxide and superoxide radicals, respectively) and virulence of Staphylococcus aureus.
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The Biogenesis of Peroxisomal Catalase in Rat Liver
<p>Rat liver peroxisomal catalase was purified to homogeneity. The starting material was purified peroxisomes, The purity of the final preparation was judged by Sephadex G-200 chromatography, SDS gel electrophoresis, spectral analysis, and immunochemical means. Two sera containing anticatalase …
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Catalase : a possible marker for human alcohol consumption
Earlier studies have suggested that catalase activity may be a predictor of alcohol intake in animals and in humans. The hypothesis that blood catalase may represent a biological marker for human alcohol intake was tested. An initial study was first designed to rule out the possibility that …
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Plasmid-influenced changes in Mycobacterium avium catalase activity
… phase cells of strain LR163 had 30% of the catalase activity of mid-log phase cells of strain LR25 and were more susceptible to hydrogen peroxide (0.08% w/v). Catalase activities of late-log, early-stationary, and stationary phase cells of strain LR163 were Significantly higher than mid-log …
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Catalase-loaded liposomal magnesium phosphate nanoparticles for intracellular protein delivery
… the intracellular delivery of the protein, catalase. The objective of the current research is to improve the physicochemical properties of CAT-LP MgP NP. The magnesium phosphate (MgP) nanoparticles were prepared by water-in-oil micro emulsion precipitation. The cargo protein catalase was …
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The effects of catalase and kisspeptin overexpression on amyloid peptide toxicity
… specifically bind to Aβ are neuroprotective. Catalase is an antioxidant enzyme that specifically binds Aβ. Kisspeptin (KP) is a product of the KiSS-1 gene and contains an Aβ binding domain, which also interacts with Aβ. The localization of catalase, KP and Aβ in the AD brain plus the effects …
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Isolation and Characterization of Staphylococcus Aureus Mf-31 Catalase (Enzyme, Protein)
S. aureus MF-31 catalase was purified to homogeneity using ethanol-chloroform fractionation, ammonium sulfate precipitation, ultrafiltration and gel filtration.
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Catalase, superoxide dismutase, and hemolysin in the virulence of Listeria monocytogenes
… of Listeria monocytogenes were examined for catalase, superoxide dismutase (SOD), and listeriolysin O (LLO) activities. The two strains having the lowest catalase activities also possessed the lowest SOD activities. Exogenous hydrogen peroxide was added to suspensions of four L. monocytogenes …
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Catalase and Superoxide Dismutase Activity in Response to Elevated Oxygen in Drosophila Melanogaster
… higher oxygen affected the specific acitivity of catalase, especially in adults raised completely in the 50% atmosphere, but neither catalase nor superoxide dismutase showed evidence of induction beyond the normal level. The lack of increased production of these protective oxido-reductases in an …
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Investigation of catalase and superoxide dismutase from Mycobacterium avium, M. intracellulare and M. scrofulaceum
Catalase and superoxide dismutase, but not peroxidase activity was detected in cell-free extracts of Mycobacterium avium, M. intracellulare and M. scrofulaceum (MAIS). The M. scrofulaceum isolates had the highest catalase activity, while both M. avium and M. intracellulare had significantly lower …
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Analysis of a Tn917 Transposon Mutant and Preliminary Characterization of NonHemolytic, Catalase-Deficient Variants of Staphylococcus aureus
… Preliminary Characterization of Nonhemolytic, Catalase-Deficient Variants of Staphylococcus aureus. Masters of Science (Microbiology). June 1999. Pages-101. Tables-15. Figures-10. A Tn917 transposon mutant of Staphylococcus aureus S6C was isolated and analyzed due to its deficiency in hemolysin …
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A novel intracellular protein delivery system - Magnesium phosphate nanoparticles with cationic lipid coating for catalase intracellular delivery
… nanoparticles with cationic lipid coating for catalase intracellular delivery (LP MgP NP-CAT), and investigate whether it can release the encapsulated catalase to cytosol. LP MgP NP-CAT was designed, prepared and characterized, showing that it had an average diameter around 300 nm and zeta …
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Determinação de peróxido de hidrogênio em água e leite usando nanopartículas de ferro como mimetizadoras da catalase
O peróxido de hidrogênio é utilizado em diversos setores industriais. No tratamento de água, atua como um agente oxidante, promovendo a remoção de substâncias recalcitrantes aos tratamentos convencionais. Na indústria alimentícia é usado como sanitizante, podendo ser adicionado ao leite como …
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Development and characterization of a hydrogen peroxide sensor using catalase immobilized on a pyroelectric poly(vinylidene fluoride) film
This dissertation describes the design, development and results of a simple, inexpensive, rugged, pyroelectric heat-of-reaction detector that can be made in many configurations. The measured heat of reaction results from the reaction of a substrate on an enzyme. The enzyme is immobilized in a flow …
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An examination of the effects of the catalase inhibitor 3-amino-1,2,4-triazole on ethanol, food and water intake
The effects of the catalase inhibitor 3-amino-1,2,4-triazole (AT) were examined on ethanol, food and water intakes to determine if it produced a decrease in ethanol consumption through the decrease in catalase produced acetaldehyde or to a general decrease in caloric intake. Experiment 1A …
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Electron paramagnetic resonance and resonance Raman spectroscopic investigations of the ferric ligand complexes and the oxidized intermediates of catalase and bromoperoxidase
Catalase (M. luteus) and bromoperoxidase (P. capitatus) are hemeproteins which are members of a broad family of enzymes known as hydroperoxidases. These enzymes are characterized by their ability to oxidize suitable substrates using hydrogen peroxide. The native enzymes and their fluoride, azide …
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On-line measurement of active biomas
… instrument was developed to measure biomass catalase activity of suspended cultures. The technology was applied to develop a batch method of measuring activity in other media (e.g. soils) and a method of measuring hydrogen peroxide concentration. The biomass catalase activity of different …
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