Results 191 to 200 of about 25,961 (244)
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Reoxygenation of tumours in “sandwich” chambers
European Journal of Cancer (1965), 1979Abstract The process of reoxygenation of tumour tissue was studied in the rhabdomyosarcoma BA1112 following single doses of 10 and 20 Gy of X-rays. The analytical system consisted of the evaluation of the fluorescence response of the hypoxia-induced conversion of NAD to NADH.
Reinhold, H.S. +2 more
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Mechanisms of hippocampal reoxygenation injury
Molecular and Chemical Neuropathology, 1998Mechanisms of 12 min of hypoxia and subsequent reoxygenation were studied in rat hippocampal slices. General cell injury in reoxygenation was indicated by increased lactate dehydrogenase (LDH). Increase in conjugated dienes (CD) showed that oxygen radical burst induced lipid peroxidation (LPO).
L, Horáková +4 more
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Reoxygenation in the RIF-1 tumor
International Journal of Radiation Oncology*Biology*Physics, 1984The proportion of hypoxic cells in the RIF-1 tumor was examined for 13 days following a 15 Gy conditioning dose. The paired survival curve technique indicated that 100% of the surviving cells were hypoxic immediately following this treatment. However, within 1 hour, only about 50% remained hypoxic; this proportion continued to drop to about 10% but did
M J, Dorie, R F, Kallman
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Biochemistry of reoxygenation injury
Critical Care Medicine, 1988This paper summarizes current knowledge on the biochemistry of oxygen toxicity in general and the ischemia-reoxygenation tissue injury in particular. The superoxide radical, hydrogen peroxide, and the hydroxyl radical in cells can be formed enzymically or nonenzymically. Primary effects of oxygen radicals result in lipid peroxidation, which is believed
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Deoxygenation and Reoxygenation
Transactions of the American Society of Civil Engineers, 1939Too frequently, sewage disposal is thought of as synonymous with discharge into the nearest body of water. Such is not the case.
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Myocardial reoxygenation damage: can it be circumvented?
Cardiovascular Research, 1985We investigated whether reoxygenation damage could be prevented by interventions directed towards reducing calcium influx only during the reoxygenation period. We measured reoxygenation contracture and recovery of contractile performance, using isolated papillary muscle preparations from cat and rabbit, pretreated with ouabain so as to exaggerate the ...
A H Henderson, Lewis M J, Henderson A H
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Free Radical Research Communications, 1991
Tissue changes consistent with oxidative damage in hypoxic/reoxygenated heart tissue have not been well documented. We recently reported that oxidative perturbations were evident in isolated-perfused rat heart tissue subjected to as little as 10 min hypoxia and that these changes were not exacerbated by reoxygenation.
Y, Park, J P, Kehrer
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Tissue changes consistent with oxidative damage in hypoxic/reoxygenated heart tissue have not been well documented. We recently reported that oxidative perturbations were evident in isolated-perfused rat heart tissue subjected to as little as 10 min hypoxia and that these changes were not exacerbated by reoxygenation.
Y, Park, J P, Kehrer
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Hypoxia/Reoxygenation Affects Endotoxin Tolerance
Journal of Surgical Research, 1995Pretreatment of animals with sublethal doses of endotoxin renders them tolerant to subsequent endotoxin challenge. Tissue hypoxia following infection may potentiate the immune response to injury. To evaluate the effect of hypoxia/reoxygenation (H/R) on endotoxin tolerance by macrophages, adult CBA mice were pretreated with 10 micrograms/animal of LPS ...
G, Arya, V F, Garcia
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Tumor Reoxygenation and Postirradiation Vascular Changes
Radiology, 1978Postirradiation reoxygenation kinetics of the Walker 256 carcinoma were examined and related to radiation-induced changes in tumor vascular functions. Changes in the hypoxic cell component of irradiated Walker tumors may occur by two mechanisms. Reoxygenation of previously hypoxic cells may be due to an increased rate of blood flow in some parts of the
J J, Clement, N, Tanaka, C W, Song
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