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Página 1 desde 147 resultados
Effect of hydroxyethyl starch on vascular leak syndrome and neutrophil accumulation during hypoxia.
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OBJECTIVE
Several studies have suggested that intravenous hydroxyethyl starch treatment may dampen acute inflammatory responses. It is well documented that limited oxygen delivery to tissues (hypoxia) is common in acute inflammation, and numerous parallels exist between acute responses to hypoxia
Abdominal radiation response modified by hypoxia after intra-aortal injection of starch microspheres. Experiments in the rat.
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Degradable starch microsphers were injected in the aorta of rats above the level of the superior mesenteric artery 5 min before roentgen irradiation of the abdomen. The local hypoxia, induced by the spheres, was found to have an appreciable protective effect. The dose modification factor was
Mucosal protection during irradiation of exteriorized rat ileum. Effect of hypoxia induced by starch microspheres.
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Transient hypoxia induced by intra-arterial injection of degradable starch microspheres was used for protection of exteriorized segments of the rat ileum. Microscopic evaluation of the injury to the mucosa gave a dose modification factor of 0.44 +/- 0.04, which corresponds to an oxygen enhancement
Comparative Study on the Bread Making Quality of Normoxia- and Hypoxia-Germinated Wheat: Evolution of γ-Aminobutyric Acid, Starch Gelatinization, and Gluten Polymerization during Steamed Bread Making.
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To explore the bread making characteristics of germinated wheat flour, the current study focused on the componential evolution throughout the steamed bread making process. Hypoxia-germinated wheat (HGW) dough produced the maximum γ-aminobutyric acid as a result of high glutamic acid decarboxylase
Concerted Up-regulation of Aldehyde/Alcohol Dehydrogenase (ADHE) and Starch in Chlamydomonas reinhardtii Increases Survival under Dark Anoxia.
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Aldehyde/alcohol dehydrogenases (ADHEs) are bifunctional enzymes that commonly produce ethanol from acetyl-CoA with acetaldehyde as intermediate and play a key role in anaerobic redox balance in many fermenting bacteria. ADHEs are also present in photosynthetic unicellular eukaryotes, where their
Gene regulation and survival under hypoxia requires starch availability and metabolism.
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Plants respond to hypoxia, often caused by submergence, by expressing a specific set of genes that contribute to acclimation to this unfavorable environmental condition. Genes induced by low oxygen include those encoding enzymes for carbohydrate metabolism and fermentation, pathways that are
Effect of anoxia on starch breakdown in rice and wheat seeds.
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The capabilities of rice (Oryza sativa L.) and wheat (Triticum aestivum L.) seeds (caryopses) to degrade starchy reserves present in the endosperm tissue were compared under anaerobic conditions. The results showed that rice, a species highly tolerant to anoxia, can readily break down starch under
The highly variable microbiota associated to intestinal mucosa correlates with growth and hypoxia resistance of sea bass, Dicentrarchus labrax, submitted to different nutritional histories.
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The better understanding of how intestinal microbiota interacts with fish health is one of the key to sustainable aquaculture development. The present experiment aimed at correlating active microbiota associated to intestinal mucosa with Specific Growth Rate (SGR) and Hypoxia Resistance Time (HRT)
Effect of prolonged hypoxia in autotrophic conditions in the hydrogen production by the green microalga Chlamydomonas reinhardtii in photobioreactor.
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In the context of hydrogen production by the green alga Chlamydomonas reinhardtii, the control of light attenuation conditions is used to set-up anoxia under illuminated and autotrophic conditions, without affecting photosynthetic capacities of cells (as with sulphur deprivation or PSII inhibitors
Histology and ultrastructure of liver and kidney following blood exchange with ultrapurified, polymerised bovine hemoglobin in comparison with hydroxyethyl starch.
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Because of their oxygen binding capacity, cell-free hemoglobin solutions are promising blood substitutes. However, their clinical use has so far been limited by toxic side effects on liver and kidney until ultrapurification and chemical modifications have been established in the production process
Experimentally-induced acute lung injury: the protective effect of hydroxyethyl starch.
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The objective of this study was to evaluate the effects of hydroxyethyl starch, (130/0.4) 6%, compared to Ringer's acetate and modified gelatin on hypoxemia, inflammatory response, and oxidative stress in an experimental model of acute lung injury (ALI). The ALI/Adult Respiratory Distress Syndrome
Hydrogen production in Chlamydomonas: photosystem II-dependent and -independent pathways differ in their requirement for starch metabolism.
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Under sulfur deprivation conditions, the green alga Chlamydomonas reinhardtii produces hydrogen in the light in a sustainable manner thanks to the contribution of two pathways, direct and indirect. In the direct pathway, photosystem II (PSII) supplies electrons to hydrogenase through the
Kidney radioprotection by temporary hypoxia. Experiments with degradable microspheres.
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Deep hypoxia protects biological tissue against ionizing radiation. By intra-arterial injection of degradable starch microspheres the renal circulation was temporarily blocked in unilaterally nephrectomized rats. The induced hypoxia was utilized for protection of the kidney against single doses of
Hypoxemia following pulmonary embolism: a dog model of altering regional perfusion.
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We studied the role played by a shift in perfusion to hypoxic lung areas after pulmonary embolism in pst embolic hypoxemia. A tracheal divider was used to separate hypoxic (N2 ventilated) from oxygenated (100 per cent O2 ventilated) lung in anaesthetized dogs. Relative perfusion was assessed from
Ultrastructure of bone marrow of rats after severe hemodilution with starch or modified hemoglobin.
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The ultrastructure of bone marrow of rats was studied 24 h after exchange-transfusion with solutions of starch or modified hemoglobin to a hematocrit of 10-15. Blood smears of the transfused rats had 17-20% reticulocytes as compared to 5-6% for sham operated controls. In the transfused rats marrow
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