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Bladzijde 1 van 81 resultaten
Stupor and coma: pathophysiology of hypoxia--ontogenetic aspects.
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There are several levels of O2 deprivation with different possibilities of adaptation and compensation. All of them appear to be highly conservative in phylogenesis and are active early in ontogenetic development. The coordinated structural and functional responses to systemic and/or local hypoxia
The sequence of functional changes in a neurone during narcosis and anoxia.
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Animal model of cardiotoxicity: carbon monoxide induced ECG hypoxia masked in light narcosis.
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Inhalation exposure of restrained conscious rats to carbon monoxide (1000 ppm, 120 min.) led to a peak carboxyhaemoglobine concentration of 40-45%. At this concentrations spontaneous motor activity was not affected significantly but the physical capacity at endurance run was depressed by 70%. From
Factors in neonatal resistance to anoxia. III. Potentiation by narcosis of the effects of hypothermia in the newborn guinea pig.
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Narcosis and cerebral anoxia.
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[Importance of premedication in anoxemia in narcosis].
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The problem of tissue sampling from experimental animals with respect to freezing technique, anoxia, stress and narcosis. A new method for sampling rat liver tissue and the physiological values of glycolytic intermediates and related compounds.
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Drosophila dMRP4 regulates responsiveness to O2 deprivation and development under hypoxia.
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For most vertebrates, oxygen is a prerequisite for survival. Although we have previously shown that Drosophila melanogaster is hypoxia tolerant, how this species senses O(2) deprivation and how it survives oxygen-limiting conditions are as yet poorly understood. We began to address this question by
Effect of supramaximal vagal stimulation in combination with hypoxia, respiratory acidosis and deep halothane anaesthesia on cardiovascular function in dogs.
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Vagal reflexes are generally recognized as a possible cause of cardiac arrest during anaesthesia. Studies were performed to determine whether hypoxia, respiratory acidosis or deep halothane anaesthesia modify the cardiovascular effect of vagal stimulation (VS) in dogs. The animals were anaesthetized
N2O-induced hypoxia as a model of hypoxic stress of rat myocardium. An ultrastructural-morphometric study.
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A model system consisting of a hypoxia chamber combined with a commercial narcosis apparatus adapted to small animals was used to perform a controlled acute isobaric hypoxia on rats with N2O/O2. Ultrathin sections from the left ventricular wall were analysed qualitatively and quantitatively using a
Isolation and characterization of the hypoxia-inducible factor 1beta in Drosophila melanogaster.
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The hypoxia-inducible factor 1 (HIF-1), a heterodimer composed of alpha and beta subunits, plays an important role in the cellular response to O(2) deprivation. In this paper, Drosophila HIF-1beta (dHIF-1beta) homolog is cloned and characterized. Further, Northern analyses showed that dHIF-1alpha
[Pulmonary blood circulation and respiration in hypoxic and circulatory hypoxia].
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The linear and volumetric blood flow velocity in left low-lobar pulmonary artery and vein, the balance between cardiac output of right and left ventricles, as well as the blood pressure in pulmonary and femoral arteries, respiratory movements of the chest in hypoxic (3-5% O2 in nitrogen) and
Role of PON in anoxia-reoxygenation injury: a Drosophila melanogaster transgenic model.
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BACKGROUND
Paraoxonase 1 (PON1) is a protein found associated with high density lipoprotein (HDL), thought to prevent oxidative modification of low-density lipoprotein (LDL). This enzyme has been implicated in lowering the risk of cardiovascular disease. Anoxia-reoxygenation and oxidative stress are
[Adaptogenic effect of mebikar in emotional stress, physical exertion and hypoxia].
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Adaptogenic effect of mebikar was revealed in experiments on cats, mice and rats. The drug was shown to decrease the emotional stress and to completely remove the stupor-like state in cats induced by stress situation and pain stimulation. The drug slightly increased the lifespan of animals under
[Diaphragmatic blood flow in hypoxia and hypercapnia].
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By means of ultrasonic method, used in acute experiments on cats with closed abdominal cavity under nembutal narcosis, we studied the linear and volumetric blood flow velocity in the left phrenic artery, vascular resistance, systemic blood pressure, lung ventilation, arterial blood gases during
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