Results 211 to 220 of about 523,009 (263)

Oxygen radicals and plasma membrane potential

Free Radical Biology and Medicine, 1988
Plasma membrane potential is an important physiologic parameter dependent both upon cellular metabolism and upon the integrity of the cell membrane. Oxygen radicals have been shown to produce significant and early changes in the membrane potential. This data is reviewed along with the physico-chemical origins of the membrane potential and methods of ...
J A, Scott, C A, Rabito
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Diffusion of Oxygen in Plasma and Blood

1976
D in fresh human plasma has been found to decrease almost linearly with total protein content over a wide range of concentration and to vary only +/-4% in normals and +/-13% in abnormals. The average values for D in normal human plasma, at 25 and 37 degrees C, are 1.62 and 2.18 X 10(-5) cm2/sec respectively.
T K, Goldstick, V T, Ciuryla, L, Zuckerman   +2 more
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Interaction of Oxygen Plasma With Aluminium Substrates

IEEE Transactions on Plasma Science, 2008
Inductively coupled oxygen plasma are widely used for materials processing. Optical emission spectroscopy (OES) using fast miniature fiber spectrometer was used for plasma characterization and process monitoring. Images of plasma and accompanying spectra during interaction with aluminium foil are presented.
Mozetič, Miran, Cvelbar, Uroš, Vesel, Alenka, Krstulović, Nikša, Milošević, Slobodan   +4 more
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Plasma proteins, oxygen transport and atherosclerosis

Atherosclerosis, 1972
Abstract In summary, we have presented evidence to support the hypoxic theory for the formation of atherosclerosis. More importantly, though, we have presented the following etiology for such hypoxia: 1. (1) Oxygen transport is affected by plasma protein concentrations and in most humans probably decreases with age; 2.
G M, Chisolm, J L, Gainer, G E, Stoner, J V, Gainer   +3 more
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Compounds that increase oxygen diffusion in plasma

Atherosclerosis, 1978
The rate of diffusion of oxygen in blood plasma is increased by adding certain compounds to plasma at very low concentration levels. Decreased oxygen diffusion rates in plasma causes local hypoxic conditions and this may play an important part in the pathogenesis of atherosclerosis.
Kuryel R., Akgerman A.
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Dependence of plasma pH on oxygen saturation

Respiration Physiology, 1969
Abstract The influence of haemoglobin oxygenation on the pH value of the blood plasma of healthy adolescents was investigated at 38°C by varying the parameters CO2 pressure, Hb concentration and buffer bases. A total of 5000 measurements gave the following results: 1. 1.
H J, von Mengden, D, Schultehinrichs, G, Thews   +2 more
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Oxygen barrier efficiency of hexamethyldisiloxane/oxygen plasma-deposited coating

Journal of Applied Polymer Science, 1996
Oxygen barrier coatings were made by plasma polymer deposition on a polypropylene substrate. Plasma polymer deposition is realized in a low-frequency reactor with hexamethyldisiloxane/oxygen (HMDSO/O2) precursors. The structure and composition of the deposited coating are characterized by density measurements and FTIR spectroscopy.
L. Agres, Y. Ségui, R. Delsol, P. Raynaud   +3 more
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QUENCHING OF SINGLET OXYGEN BY HUMAN PLASMA

Photochemistry and Photobiology, 1990
Abstract— Direct measurements of the decay of singlet oxygen phosphorescence at 1270 nm were made in human plasma diluted with various amounts of deuterium oxide. The Stern‐Volmer plot of the singlet oxygen lifetimes was linear up to 15% plasma concentration (vol/vol).
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Etching of Polymers by Oxygen Plasma

Proceedings, annual meeting, Electron Microscopy Society of America, 1968
Any electron microscopical study of the morphology of bulk polymers has throughout the years been hampered by the lack of any real ability to produce meaningful surface variations for replication. True etching of polymers should show crystalline and amorphous regions in some form of relief.
Virgil Peck, W. L. Carter
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Scaling laws for oxygen plasmas

IEEE Conference Record - Abstracts. 2002 IEEE International Conference on Plasma Science (Cat. No.02CH37340), 2003
Summary form only given. Electronegative gases are widely used in modern plasma technologies. Scaling laws enable one to simply estimate and predict plasma characteristics based of external discharge parameters. The presence of negative ions drastically changes the transport processes that define the spatial distributions of plasma components and other
E.A. Bogdanov, V.I. Kolobov, A.A. Kudryavtsev, L.D. Tsendin   +3 more
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