(n.) A colorless, tasteless, odorless, gaseous element occurring in the free state in the atmosphere, of which it forms about 23 per cent by weight and about 21 per cent by volume, being slightly heavier than nitrogen. Symbol O. Atomic weight 15.96.
(n.) Chlorine used in bleaching.
Example Sentences:
(1) Steady-state values of cell, glucose, and cellulase concentration oxygen tension, and outlet gas oxygen partial pressure were recorded.
(2) It is concluded that amlodipine reduces myocardial ischemic injury by mechanism(s) that may involve a reduction in myocardial oxygen demand as well as by positively influencing transmembrane Ca2+ fluxes during ischemia and reperfusion.
(3) Heart rate (HR), pulmonary ventilation (V), oxygen consumption (VO2), carbon dioxide production (VCO2), and respiratory quotient (RQ) were measured.
(4) Manometric studies with resting cells obtained by growth on each of these sulfur sources yielded net oxygen uptake for all substrates except sulfite and dithionate.
(5) The data indicate that ebselen is likely to be useful in the therapy of inflammatory conditions in which reactive oxygen species, such as peroxides, play an aetiological role.
(6) These membrane perturbation effects not observed with bleomycin-iron in the presence of a hydroxyl radical scavenger, dimethyl thiourea, or a chelating agent, desferrioxamine, were correlated with the ability of the complex to generate highly reactive oxygen species.
(7) Microelectrodes were used to measure the oxygen tension (PO2) profile within individual spheroids at different stages of growth.
(8) However, time in greater than 21% oxygen was significantly longer in infants less than 1000 g (median 30 days, 8.5 days in patients greater than 1000 g, p less than 0.01).
(9) Previous studies have not evaluated the potential for oxygen toxicity at 9.5 psia.
(10) The pH of ST solutions varied with the mode of oxygenation as follows: 7.9-8.2 in Groups I and IV; 8.7-8.9 in Groups II and V; 7.1-7.4 in Groups III and VI.
(11) The aim of this study was to plot the course of the transcutaneously measured PCO2 (tcPCO2) in the fetus during oxygenation of the mother.
(12) Blood gas variables produced from a computed in vivo oxygen dissociation curve, PaeO2, P95 and C(a-x)O2, were introduced in the University Hospital of Wales in 1986.
(13) Also for bronchogenic carcinoma with that a dependence could be shown between haemoglobin concentration--and by this the oxygen supply of the tumor--and the reaction of the primary tumor after radiotherapy.
(14) The present results using approximately 12% hemoglobin concentration in 0.1 M Bistris buffer at pD 7 and 27 degrees C with and without organic phosphate show that there is no significant line broadening on oxygenation (from 0 to 50% saturation) to affect the determination of the intensities or areas of these resonances.
(15) There was good agreement between the survival of normally oxygenated cells in culture and bright cells from tumors and between hypoxic cells in culture and dim cells from tumors over a radiation dosage range of 2-5 Gray.
(16) In presence of oxygen (air) the phototactic reaction values are somewhat lower than in its absence.
(17) A fiberoptic flow-directed catheter inserted into the hepatic vein continuously measures hepatic venous oxygen hemoglobin saturation (ShvO2).
(18) Anaesthesia was achieved by a mixture of oxygen, nitrous oxide and fluothane without use of muscle relaxants.
(19) The use of 100% oxygen to calculate intrapulmonary shunting in patients on PEEP is misleading in both physiological and methodological terms.
(20) Tachycardia, pulmonary hypertension, increased venous oxygen desaturation, and increasing core temperature develop as the syndrome progresses.
Oxyhaemoglobin
Definition:
(n.) Alt. of Oxyhemoglobin
Example Sentences:
(1) Oxyhaemoglobin (4 microns at 0.35 ml.min-1) infused into the tracheal circulation almost abolished the responses to bradykinin and methacholine.
(2) Arterial oxyhaemoglobin saturation (SaO2) was monitored continuously during normal labour in 33 healthy parturients receiving pethidine and nitrous oxide for analgesia.
(3) Hypoxaemia was graded into four values of oxyhaemoglobin saturation (SpO2).
(4) In conclusion, a dry sucrose network was recognized as a significant support to the native ferrous structure of oxyhaemoglobin, while the presence of water molecules, of assumed peroxidic radicals and the action of thermal vibrations favour the oxidation and denaturation of haemoglobin.
(5) Oxyhaemoglobin used for the assay of NO, inhibited the relaxation by SIN-1, but did not reduce vessel relaxations induced by GTN or iloprost, a stable prostacyclin analogue.
(6) These values are close to those for the FeO2- centre formed in the beta-chains of normal oxyhaemoglobin.
(7) The data show that nocturnal sleep has some adverse influence on oxygen balance in these patients as suggested by the occurrence of arterial oxyhaemoglobin desaturation occurring mainly during REM stages.
(8) These results indicate that O2 rather than oxyhaemoglobin is likely to initiate divicine oxidation in the erythrocyte.
(9) The inhibition was potentiated by superoxide dismutase (SOD) and reversed by oxyhaemoglobin (oxyHb).
(10) The alpha 1 alpha 2 interface involves similar salt bridges in both forms, but in oxyhaemoglobin buries 240 A2 more surface than in deoxyhaemoglobin.
(11) The inhibition of platelet aggregation obtained with non-treated or LPS-treated SMC was potentiated by superoxide dismutase (SOD, 60 u ml-1) and ablated by oxyhaemoglobin (OxyHb, 10 microM).
(12) The change of purple oxyhaemoglobin to the darker reduced haemoglobin and methaemoglobin was used as an initial visual growth indicator in continuously agitated, aerobic Colorbact bottles after inoculation with a broad assortment of aerobic and facultatively anaerobic bacteria previously isolated from blood cultures.
(13) We have accepted that oxyhaemoglobin (Oxy-Hb) is an important spasmogenic substance.
(14) Ventilatory rate and volume and arterial oxyhaemoglobin saturation were recorded continuously for the first 24 h following surgery.
(15) Human normal, adult and foetal oxyhaemoglobins and oxyhaemoglobins from leukaemic patients were studied, by Mössbauer spectroscopy.
(16) Assessment of the intensive care patient must take into account the effect of alterations of the oxyhaemoglobin dissociation curve which can either increase or diminish tissue oxygenation.
(17) There is a loosely packed beta 1 beta 2 interface burying 320 A2 of surface in oxyhaemoglobin; there is no beta 1 beta 2 interface in deoxyhaemoglobin.
(18) Incubation of tissues with oxyhaemoglobin or the induction of tolerance to GTN abolished responses occurring in Phase I but were without effect on Phase II relaxant responses.
(19) These phenomena were compared with the dichroism of oxyhaemoglobin.
(20) Methods using a single, alkaline cresolphthalein complexone reagent are most seriously affected by haemolysis due to persistence of oxyhaemoglobin.