منابع مشابه
Hybrid Molten/Solid In2O3-Bi2O3 Oxygen Ion Transport Membranes
The hybrid molten/solid In2O3 - 30-48 wt.% Bi2O3 oxide materials were studied with respect to their transport properties. The conductivities, oxygen ion transport numbers and oxygen permeation fluxes have been measured by using the four-probe DC, volumetric measurements of the faradaic efficiency and gas flow techniques, respectively. We show that the...
متن کاملMyoglobin-mediated oxygen delivery to mitochondria of isolated cardiac myocytes.
Myoglobin-mediated oxygen delivery to intracellular mitochondria is demonstrated in cardiac myocytes isolated from the hearts of mature rats. Myocytes are held at high ambient oxygen pressure, 40-340 torr (5-45 kPa); sarcoplasmic myoglobin is fully oxygenated. In this condition oxygen availability does not limit respiratory rate; myoglobin-facilitated diffusion contributes no additional oxygen ...
متن کاملThe Determinants of Oxygen Gradients in Respiring Samples and their Impact on Cellular Responses to Hypoxia
Changes in cellular O2 levels elicit adaptive responses which can lead to the activation of oxygen-dependent transcription factors such as the hypoxia-inducible factor (HIF). However, our understanding of the determinants of these processes is still incomplete. Using the new intracellular O2 sensing technique, we monitored O2 gradients in static cultures of adherent PC12 cells exposed to graded...
متن کاملOxygen pressure gradients in isolated cardiac myocytes.
Intracellular oxygen pressure within intact isolated cardiac myocytes is studied as a function of steady state extracellular oxygen pressure. The fractional saturation of myoglobin with oxygen is used to report sarcoplasmic oxygen pressure. The fractional oxidation of cytochrome oxidase, the fractional oxidation of cytochrome c, the rate of respiratory oxygen uptake, and lactate accumulation ar...
متن کاملElectron transport to oxygen in lactobacilli.
Although bacteria of the genus Lactobacillus are typically microaerophilic or even anaerobic (a), some strains can oxidize certain substances with considerable rates of oxygen consumption (3-6). However, the pathways of electron transport in the course of these oxidations are not yet clearly defined. The role of heme catalysts is uncertain, since heme components could not be clearly demonstrate...
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ژورنال
عنوان ژورنال: Journal of Biological Chemistry
سال: 1990
ISSN: 0021-9258
DOI: 10.1016/s0021-9258(18)55410-7