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cyclopropane/hypoxia
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10 resultats
Effects of cyclopropane and of hypoxia on transmembrane potentials of atrial, ventricular and Purkinje fibers.
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Effect of cyclopropane on pulmonary vascular resistance and hypoxic pulmonary vasoconstriction in the isolated perfused cat lung.
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Cyclopropane was found to produce no significant changes in pulmonary vascular resistance or the pulmonary vasoconstrictor response to alveolar hypoxia in isolated cat lungs perfused at constant flow.
Hypoxia with a third flowmeter tube on the anaesthetic machine.
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Hypoxic mixtures of oxygen and nitrous oxide were demonstrated with three anaesthesia machines which had cyclopropane flowmeters. In one machine the bobbin did not prevent back flow and the hypoxic mixture occurred when the cyclopropane flow control was left open. Two other machines only delivered
Chemistry of indoles carrying a basic function, Part 3. Synthesis of spiro[cyclopropane-1,3'[3H]indol]-2'(1'H)-ones with antihypoxic effects.
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Hydroxyindolones (1-6, 15-16) were transformed into isatinylidenes (7, 9-13, 17-19) by dehydration with 4-toluenesulfonic acid. The dimer-type compounds (14, 20) were also isolated in a few cases. The obtained isatinylidenes were transformed into 3-spiro-cyclopropane-oxindoles (21-32) with
Induction of Enzymes Associated with Lysigenous Aerenchyma Formation in Roots of Zea mays during Hypoxia or Nitrogen Starvation.
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Either hypoxia, which stimulates ethylene biosynthesis, or temporary N starvation, which depresses ethylene production, leads to formation of aerenchyma in maize (Zea mays L.) adventitious roots by extensive lysis of cortical cells. We studied the activity of enzymes closely involved in either
Selective oxygen leak. A potential cause of patient hypoxia.
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A case is described where a patient received less oxygen than was set on the Rotameters. The cause was traced to a selective leak of oxygen via an open cyclopropane needle valve. Several recommendations are put forward to prevent a recurrence.
[Characteristics of impaired gas exchange in patients with chronic obstructive pulmonary disease].
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Eleven patients with chronic obstructive pulmonary disease (COPD), placed in a supine position, were given a mixture of 0.1% CO and 21% O2 in N2 as inspired gas and normal saline containing the six inert gases including SF6, ethane, cyclopropane, halothane, diethyl ether and acetone via the
Influence of anesthesia on autoregulation of the cerebral blood flow.
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Autoregulation of the cerebral blood flow is a wellknown fact. In normal man the arterial pressure can vary from 80 mm Hg to 150 mm Hg without a change in the normal cerebral blood flow of 50 ml/100 g/min. The mechanism which is responsible for this autoregulation is not clearly understood. Several
Decreased Ethylene Biosynthesis, and Induction of Aerenchyma, by Nitrogen- or Phosphate-Starvation in Adventitious Roots of Zea mays L.
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Plants of Zea mays L. cv TX5855 were grown in a complete, well oxygenated nutrient solution then subjected to nutrient starvation by omitting either nitrate and ammonium or phosphate from the solution. These treatments induced the formation of aerenchyma close to the apex of the adventitious roots
Synthesis by radical cyclization and cytotoxicity of highly potent bioreductive alicyclic ring fused [1,2-a]benzimidazolequinones.
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The key step in the synthesis of new five, six and seven-membered alicyclic ring [1,2-a]-fused bioreductive benzimidazolequinones was radical cyclisation. Six and seven-membered tributyltin hydride-mediated homolytic aromatic substitutions of nucleophilic N-alkyl radicals onto the
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