Results 251 to 260 of about 2,962,668 (308)

Ionic Cocrystal Programming of Spatial Ionic Organization in Carbon Nitrides Enables Highly Efficient H2O2 Photosynthesis

Advanced Materials, EarlyView.
Ionic cocrystal‐programmed ionic organization establishes a general strategy for electrostatic programming in polymeric photocatalysts. ABSTRACT Controlling the spatial organization of ions in polymeric photocatalysts remains a fundamental challenge for optimizing charge transport and catalytic selectivity in solar‐driven hydrogen peroxide (H2O2 ...
Anna Lo Presti, Zahra Hajiahmadi, Sam A. J. Hillman, Mu Xiao, James R. Durrant, Thomas D. Kühne, Christian Mark Pelicano   +6 more
wiley   +1 more source

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Oxygen atom density in microwave oxygen plasma

Vacuum, 2007
Abstract We determined the density of neutral oxygen atoms in microwave plasma using a fiber-optics catalytic probe (FOCP). Plasma was created within a quartz tube with an outer diameter of 5 cm by a 2.45 GHz microwave generator with an output power up to 1000 W. The oxygen flow was varied between 4 and 20 l/h.
Marianne Balat-Pichelin, Miran Mozetič, Alenka Vesel   +2 more
exaly   +2 more sources

Sterilization by Pure Oxygen Plasma and by Oxygen - Hydrogen Peroxide Plasma: an Efficacy Study

International Journal of Pharmaceutics, 2007
Plasma is an innovative sterilization method characterized by a low toxicity to operators and patients, and also by its operation at temperatures close to room temperatures. The use of different parameters for this method of sterilization and the corresponding results were analyzed in this study. A low-pressure inductive discharge was used to study the
M R, Boscariol, A J, Moreira, R D, Mansano, I S, Kikuchi, T J A, Pinto   +4 more
openaire   +2 more sources

Plasma Oxygen during Cardiopulmonary Bypass: A Comparison of Blood Oxygen Levels with Oxygen Present in Plasma Lipid

Clinical Science, 1998
1. Although not often appreciated, it is a fact that molecular oxygen is more soluble in lipids than in aqueous solution. We have recently developed a method to monitor oxygen within the lipid content of plasma. Monitoring plasma oxygen is one essential element during open heart surgery using a cardiopulmonary bypass pump and oxygenator.
I M, Petyaev, A, Vuylsteke, D W, Bethune, J V, Hunt   +3 more
openaire   +2 more sources

Sterilization by oxygen plasma

Applied Surface Science, 2004
Abstract The use of polymeric medical devices has stimulated the development of new sterilization methods. The traditional techniques rely on ethylene oxide, but there are many questions concerning the carcinogenic properties of the ethylene oxide residues adsorbed on the materials after processing.
Adir José Moreira, Ronaldo Domingues Mansano, Terezinha de Jesus Andreoli Pinto, Ronaldo Ruas, Luis da Silva Zambon, Mônica Valero da Silva, Patrick Bernard Verdonck   +6 more
openaire   +1 more source

Anodic oxidation of GaAs in oxygen plasma

1977 International Electron Devices Meeting, 1977
This paper deals with the development of a new technology of forming an oxide film on GaAs. It can be used for surface passivation of GaAs or other compound semiconductor devices, for gate insulation of GaAs MISFETs and also for isolation in GaAs IC. A low temperature of below 300°C is required to prevent the evaporation of As during oxidation.
K. Yamasaki, T. Sugano
openaire   +1 more source

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
openaire   +2 more sources

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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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 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
openaire   +2 more sources