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Página 1 a partir de 60 resultados
Naphthalene-induced oxidative stress in rats and the protective effects of vitamin E succinate.
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Quinone metabolites of naphthalene (NAP) are known to produce lipid peroxidation. However, the ability of naphthalene to induce oxidative stress in experimental animals has not been extensively investigated. Furthermore, the effects of vitamin E succinate [(+)-alpha-tocopherol acid succinate; VES]
Protective effects of vitamin A and vitamin E succinate against 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)-induced body wasting, hepatomegaly, thymic atrophy, production of reactive oxygen species and DNA damage in C57BL/6J mice.
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The protective effect of vitamin A and vitamin E succinate against 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD)-induced acute toxicity and measures of oxidative stress was studied. Ten mice were treated with either vitamin A (50 mg/kg every other day for eight days) or vitamin E succiante (150
Peppermint oil enhances cyclosporine oral bioavailability in rats: comparison with D-alpha-tocopheryl poly(ethylene glycol 1000) succinate (TPGS) and ketoconazole.
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Peppermint oil inhibits cyclosporine metabolism in vitro. The current work compared the effects of peppermint oil, ketoconazole, and D-alpha-tocopheryl poly(ethylene glycol 1000) succinate (TPGS) on cyclosporine oral bioavailability. Male Sprague-Dawley rats were administered cyclosporine (25 mg/kg)
Labelling of chlorophylls and precursors by [2-14C]glycine and 2-[1-14C]oxoglutarate in Rhodopseudomonas spheroides and Zea mays. Resolution of the C5 and Shemin pathways of 5-aminolaevulinate biosynthesis by thin-layer radiochromatography.
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The C-5 of 5-aminolaevulinate, a tetrapyrrole precursor which accumulates when inhibitory laevulinate is present, is derived from either the C-2 of glycine by the 5-aminolaevulinate-synthase-mediated Shemin pathway or the C-1 of 2-oxoglutarate by the C5 pathway. Thin-layer-radiochromatographic
Histochemical studies on reserve substances and enzymes in female gametophyte of Zea mays.
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Cytochemical changes during the early development of maize caryopsis are reported. Changes in the localization of different reserve substances (e.g. polysaccharides, proteins, nucleic acids and lipids) and enzymes (acid phosphatase, esterase, lipase, phosphorylase, succinate dehydrogenase,
Solubilization of a Proline Dehydrogenase from Maize (Zea mays L.) Mitochondria.
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L-Proline is oxidized to pyrroline-5-carboxylic acid in intact plant mitochondria by a proline dehydrogenase (EC 1.4.3) that is bound to the matrix side of the inner mitochondrial membrane (TE Elthon, CR Stewart [1981] Plant Physiol 67: 780-784). This investigation reports the first solubilization
DIFFERENTIAL EFFECTS OF EXOGENOUS RESVERATROL ON THE GROWTH AND ENERGY METABOLISM OF Zea mays AND THE WEED Ipomoea grandifolia.
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An increase in crop competitiveness relative to weed interference has the potential to reduce crop yield losses. In this study, the effects of phytoalexin resveratrol were examined in Zea mays L. (corn) and in the weed species Ipomoea grandifolia (Dammer) O'Donell (morning glory). At a concentration
The Involvement of Aspartate and Glutamate in the Decarboxylation of Malate by Isolated Bundle Sheath Chloroplasts from Zea mays.
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Aspartate or glutamate stimulated the rate of light-dependent malate decarboxylation by isolated Zea mays bundle sheath chloroplasts. Stimulation involved a decrease in the apparent K(m) (malate) and an increased maximum velocity of decarboxylation. In the presence of glutamate other dicarboxylates
Lipid peroxidation in rat tissue slices: effect of dietary vitamin E, corn oil-lard and menhaden oil.
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Rats were fed for 5 weeks either 10% (w/w) menhaden oil (MO) or a 10% corn oil-lard (COL) mixture (1:1) in diets with less than or equal to 5 IU or less than or equal to 2 IU/kg vitamin E, respectively, or the same diets supplemented with d-alpha-tocopheryl succinate to a total of 35 and 180 IU
Mitochondria from the Mesophyll Cells of Zea mays Leaves.
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Improvements in preparative techniques have made it possible to isolate and purify mitochondria from the mesophyll cells of Zea mays leaves. Contamination by mitochondria from the bundle sheath cellswas insignificant. The use of a self-generatedPercoll gradient allowed the purification of washed
Carboxin-resistant mutant of ustilago maydis is impaired in its pathogenicity for zea mays
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We analyzed the pathogenicity of chitin synthetase (chs) disruptants of Ustilago maydis obtained with the carboxin-resistant or the hygromycin-resistant cassettes. We found that only chitin synthetase (chs) mutants obtained by gene disruption with the carboxin resistance cassette lost their
Differences in the Anaerobic Lactate-Succinate Production and in the Changes of Cell Sap pH for Plants with High and Low Resistance to Anoxia.
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Anaerobically treated seedlings of Oryza sativa L. var arborio accumulated in their shoots more succinate than lactate and cell sap became alkaline. Conversely, in Triticum aestivum L. var MEK 86 lactate accumulation was far higher than that of succinate and cell sap was acidified. Anoxia clearly
Expression and promoter methylation of succinate dehydrogenase and fumarase genes in maize under anoxic conditions.
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Succinate dehydrogenase (SDH) and fumarase enzyme activity and expression of genes encoding the SDH subunits A (Sdh1-2), B (Sdh2-3), C (Sdh3), D (Sdh4) and the mitochondrial (Fum1) and cytosolic (Fum2) isoforms of fumarase were quantified in maize (Zea mays L.) seedlings exposed to atmospheres of
Expression of succinate dehydrogenase and fumarase genes in maize leaves is mediated by cryptochrome.
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Blue light inhibits succinate dehydrogenase and fumarase enzyme activity and gene expression in green leaves of maize (Zea mays L.). Irradiation of maize plants by blue light resulted in the transient decrease of transcripts of genes Sdh1-2 and Sdh2-3 encoding correspondingly the flavoprotein and
Expression of genes encoding subunits A and B of succinate dehydrogenase in germinating maize seeds is regulated by methylation of their promoters.
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Succinate dehydrogenase (SDH) activity, isoenzyme pattern, and expression of two genes encoding subunit A and of three genes encoding subunit B have been investigated in the scutellum of germinating maize (Zea mays L.) seeds. Four SDH isoforms were detected electrophoretically and by ion-exchange
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