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The application of electrostatic techniques has been investigated as a repulsion system to keep dust off mirrors that might be used in high-power laser systems. A demonstration unit for a 30 cm mirror was built and shipped to Kirtland Air Force Base as part of the program. Other efforts investigated the development of technology that might be used to keep dust and contaminants off large mirrors in an orbiting space platform. If there is dust deposition it may be practical to clean the reflecting surfaces with a dry wipe-off system without damaging delicate coatings or metal films. (Author)

It is suggested that the exoelectron emission from the catalyst may be used to monitor the rate of oxidation of CO and CH4 over palladium catalysts. Indirect heating of the catalyst and atmospheric pressure have no effect upon this monitoring system. Although the mechanism relating catalysis to exoelectron emission is not clear, it is considered possible that electron emission is triggered by the adsorption-desorption cycle.

A number of workers have linked the pathogenicity of silica with its capacity to damage biological membranes. We have investigated this membrane damaging process using red blood cells as a model membrane system. The following factors in the silica-membrane interaction were studied: concentration of reactants; rate of reaction; temperature dependence of the reaction; the effects of osmolarity, ionic strength, and pH on the reaction; factors terminating the reaction; the effect of the polymeric state of the silica; the effect of sialic acid removal from the membrane; the size-stability characteristics of the membrane defects; and the identity of the membrane component involved in the reaction. Our results suggest that silica hydrogen bonds to protein components of the membrane and subsequently abstracts these proteins from the membrane. These results appear to support the mechanism underlying the pathogenesis of silicosis advanced by A. C. Allison in 1971 with the exception that our experimental findings favor a silica-protein interaction rather than the silica-lipid interaction proposed by Allison.

Electric field effect on chemisorption of oxygen on zinc oxide, discussing electron transfer mechanism

Exo-electron emission was observed during catalytic oxidation of CO, H 2 or NH 3 on hot platinum. The exo-electron current level was related to the rate of reaction. Suppressing or enhancing the exo-electron current decreased or increased the rate of reaction.

Thermionic emission measurement for palladium filament exposed to molecular and atomic hydrogen beam - hydrogen chemisorption on palladium

The introduction of sterile collodial carbon into the dermis produces an area of low electrical resistance in the intact skin. The low resistance spot is suitable for long term, dry contact, stimulation or specialized ECG/EEG measurements.

A surface ionization detector for hydrogen has been developed. This device detects hydrogen in the presence of air at one atmosphere. The detector is not sensitive to other atmospheric gases, e.g., O2, N2, and CO2, and operates at H2/air levels as low as 0.1% by volume.

A chemisorption detector for hydrogen has been developed. The device depends upon the change in work function of a palladium filament when it is exposed to hydrogen. The detector is effective over the pressure range of 10−5 to 10−8 Torr. The system has been checked for sensitivity to other gases, i.e., O2 and N2; it responds strongly to O2 and weakly to N2.

Etude experimentale. Le procede convient mieux aux tissus qui collectent la poussiere en surface qu'a ceux qui la retiennent en profondeur