Auto Oxidation
Mostrando 13-24 de 26 artigos, teses e dissertações.
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13. Metabolismo de lipoproteinas plasmaticas em tabagistas : proteinas reguladoras e modificações quimicas das lipoproteinas de baixa densidade
A aterosclerose é uma doença imuno-inflamatória e de caráter multifatorial. O tabagismo é um de seus principais fatores de risco, existindo grande controvérsia na literatura quanto aos mecanismos fisiopatológicos de sua aterogenicidade. Avaliamos os efeitos metabólicos e oxidantes do fumo em urna população sadia adulta, composta de fumantes crônic
Publicado em: 2002
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14. Production of microencapsulados of starch with recobrimento in bed fluidizado / Produção de microencapsulados de amido com recobrimento em leito fluidizado
Thin polymeric layers, when applied to microcapsules, can increase the degree of protection and control the release of the contents. Starch microcapsules containing gelatin as binding material, obtained by spray drying, were filled with commercial fish oil by adsorption, and subsequently encapsulated, aimed at forming a film either with gelatin or with a mix
Publicado em: 2000
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15. Efeito da vitamina e sobre os niveis de auto-anticorpos formados contra LDL oxidada em hamsters hiperlipidemicos
Oxidation of low-density lipoproteins plays an important role in atherogenesis, and the supplementation of vitamin E may protect low-density lipoprotein partic1es against oxidation. Oxidized low-density lipoprotein partic1es are immunogenic and lead to specific antibody formation. U sing an modified ELISA technique we have analyzed the modulation of autoanti
Publicado em: 1998
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16. Efeitos de oxigenio singlete gerado fotoquimica e enzimaticamente sobre o acido ribonucleico de transferencia de E. coli
Both malonaldehyde and indole-3-acetic acid undergo aerobic peroxidase-catalysed oxidation to produce singlet oxygen, while in lhe second reaction, excited indole-3-aldehyde is algo produced. These reactions occur by means of biophotoenergetic processes another means to produce singlet oxygen is by use of sensitzers in a photochemical process. Singlet oxygen
Publicado em: 1986
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17. Oxygen-mediated heterogeneity of apo-low-density lipoprotein.
Mild oxidation of human serum low-density lipoprotein (LDL) converts the apoprotein from a nearly homogeneous component of high apparent molecular weight to a mixture of apparently lower molecular weight polypeptide components, as characterized by sodium dodecyl sulfate/polyacrylamide gel electrophoresis. This protein alteration, which correlates temporally
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18. Ceroid granulomas in the female genital system.
Three cases of ceroid granulomas of the female genital system are presented, involving the cervix in two and lesions in the ovaries and bowel serosa in the other. Ceroid granulomas are unusual and interesting lesions formed when suitable substrates accumulate within macrophages to such an extent that a relative lack of biological antioxidants results and aut
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19. Activation of a novel non-selective cation channel by alloxan and H2O2 in the rat insulin-secreting cell line CRI-G1.
1. Alloxan and its auto-oxidation product hydrogen peroxide (H2O2) irreversibly depolarize insulinoma cells by opening a non-selective cation channel. The channel opened is characterized by a linear current-voltage relation with a conductance of approximately 70 pS and very slow kinetics (of the order of seconds). 2. Cells are protected against the alloxan-i
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20. In Vitro Activity of Riboflavin against the Human Malaria Parasite Plasmodium falciparum
The human malaria parasite Plasmodium falciparum digests hemoglobin and polymerizes the released free heme into hemozoin. This activity occurs in an acidic organelle called the food vacuole and is essential for survival of the parasite in erythrocytes. Since acidic conditions are known to enhance the auto-oxidation of hemoglobin, we investigated whether hemo
American Society for Microbiology.
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21. Sporicidal Action of Auto-oxidized Ascorbic Acid for Clostridium1
Neutralized ascorbic acid (AA), buffered or unbuffered and autoclaved or filter-sterilized, was sporicidal for Clostridium. A 0.2% concentration of AA was generally employed, and spore counts were made in a soft-agar modification of Wynne's medium in Prickett tubes. Spores of Clostridium botulinum 115B were less susceptible than those of C. sporogenes PA 367
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22. NAD(P)H oxidase activity in human neutrophils stimulated by phorbol myristate acetate.
Phorbol myristate acetate activated in normal human neutrophils a single enzymatic entity that was dormant in unstimulated cells, optimally active at pH 7.0, and capable of oxidizing either NADH or NADPH, producing NAD(P)+ and superoxide (O27). Comparative fluorometric and spectrophotometric measurements supported the stoichiometry NAD(P)H + 20(2) leads to N
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23. The molecular response to reductive stress in LLC-PK1 renal epithelial cells: coordinate transcriptional regulation of gadd153 and grp78 genes by thiols
Organic thiols are toxic to eukaryotic cells. Treatment of cells with thiols activates exporession of grp78, but it is not known if, like other forms of strees, there is a battery of stress response genes that are induced by thiols, In LLC-PK1 renal epithelial cells, mRNAs for both grp78 and gadd153 were induced by thiols with similar time, concentration and
Cell Stress Society International.
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24. Hemoglobin Syracuse (alpha2beta2-143(H21)His leads to Pro), a new high-affinity variant detected by special electrophoretic methods. Observations on the auto-oxidation of normal and variant hemoglobins.
Family members from four generations were found to have polycythemia and increased whole blood O2 affinity (P50; 11 mm Hg; normal, 27 mm Hg). No abnormal hemoglobin bands were seen after electrophoresis on starch gel at pH 8.6 or agar gel at pH 6.0. Analysis of the oxygenated hemolysate by isoelectric focusing on polyacrylamide gel revealed two closely space