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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Substituent Effects in Unimolecular Ion Decompositions. III - Elucidation of Competing Alternative Pathways for the Formation of a Particular Ion
Alternative means for formation of molecular ion in mass spectra
Anatomical evidence for an efferent vestibular pathway
Pattern and distribution of efferent vestibular innervation to labyrinth studied by axon degeneration techniques
Tests of canal function with special reference to central vestibular pathways
Techniques for examination of controlling mechanisms of vestibular reflex arc due to rotary and caloric stimulation
Central control of the pineal gland - Visual pathways.
Pineal gland central control in female rats exposed to continuous environmental illumination
Histochemical studies on the distribution of some enzymes of the glycolytic pathways in the olfactory bulb of the Squirrel Monkey
Glycolytic enzymes distribution in squirrel monkey olfactory bulb determined by histochemical studies
Oxidative enzymes and pathways of hexose and triose metabolism in chlorella.
Detection of oxidative enzymes in hexose and triose sugar metabolism in green alga, chlorella pyrenoidosa
A Plausible Prebiotic One‐Pot Synthesis of Orotate and Pyruvate Suggestive of Common Protometabolic Pathways
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Residual visual function after brain wounds involving the central visual pathways in man.
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Visual field defects after missile injuries to the geniculo-striate pathway in man.
The main objective of the survey reported was a quantitative comparison of different visual functions at identical retinal points of individual patients. The possibility to develop objective forms of visual-field testing was also explored, taking into account reports by Frydrychowicz and Harms (1940) and Harms (1951). These investigators had insisted that pupillary responses to light are depressed in areas of homonymous scotomata. The shapes of homonymous visual field defects are discussed together with questions regarding the association and dissociation of symptoms.
An analysis of the circuitry of the visual pathway of the lateral eye of limullus
The methodology is discussed for three-dimensional analysis of the nervous system on the basis of electron micrographs of serial sections. An analysis is presented of a part of the circuitry of the rabbit retina. In addition, some exploratory work is reported with respect to the visual cortex of the cat brain. A proper technique for preservation of the visual cortex was worked out and a technique to localize microelectrode tips in the tissue in connection with electron microscopy was partially worked out.
The metabolism of carbohydrates by extremely halophilic bacteria - Glucose metabolism via a modified Entner-Doudoroff pathway
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Growth hormone control of glucose oxidation pathways in hypophysectomized rats
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Phylogenetic sequence of metabolic pathways in Precambrian cellular life
A sequence of major metabolic events is presented as they may have appeared during prokaryote evolution. This is based on (1) the phylogenetic schema derived from sequences of bacterial ferredoxin, 2Fe-2S ferredoxin, 5S ribosomal RNA, and c-type cytochromes; (2) metabolic settings in which these macromolecules are found; and (3) metabolic capabilities of the prokaryotes that carry these molecules.
Prebiotic organic matter - Possible pathways for synthesis in a geological context
Models for the accretion of the earth, core formation, differentiation of the planet into core, mantle, crust, and atmosphere, and prebiotic synthesis of organic materials are reviewed. The development of the Haldane-Oparin and Urey models is traced, and the effect of accretion time on the outgassing process and the composition of the consequent atmosphere is examined. Model prebiotic atmospheres are calculated, the extent of equilibration of the primitive atmosphere is studied and the evolution of the atmosphere prior to organic chemical evolution is reviewed. Finally, experimental progress in synthesis of biological monomers and polymers under presumed early earth conditions is covered.
Pathways of evolution for man and machine
A simplified model of the future is introduced in order to examine the relations between man, machine, and extraterrestrial intelligence. The observed lack of extraterrestrials on earth is used as a boundary condition for the model. Two exobiological conclusions are obtained: (1) advanced extraterrestrials exist but are difficult to observe or to distinguish from natural phenomena, (2) lower level, man-like extraterrestrials, which are potentially observable, are rare in the Universe because they are rapidly replaced in the evolutinary sequence by the intelligent machines which they create. The decline of man is inferred and may take place as soon as 100 years from now or as long as 100,000 years from the present time. Thus, we are a short-lived species, having a life expectancy of only a million years. A note is appended on the rationale and methods of the search for extraterrestrial intelligence in light of the above calculations. The Tau Ceti and Epsilon Eridani systems present favourable opportunities for a radio-search experiment in 1987 and 1988, respectively.
Fundamental kinetics and mechanistic pathways for oxidation reactions in supercritical water
Oxidation of the products of human metabolism in supercritical water has been shown to be an efficient way to accomplish the on-board water/waste recycling in future long-term space flights. Studies of the oxidation kinetics of methane to carbon dioxide in supercritical water are presented in this paper in order to enhance the fundamental understanding of the oxidation of human waste compounds in supercritical water. It is concluded that, although the elementary reaction models remain the best hope for simulating oxidation in supercritical water, several modifications to existing mechanisms need to be made to account for the role of water in the reaction mechanism.
Evidence for the synthesis of the multi-positional isomers of monounsaturated fatty acid in Methylococcus capsusatus by the anaerobic pathway
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