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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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Electron paramagnetic resonance study of interaction between adsorbed nitric oxide and NaY and decationized Y zeolites surfaces, considering catalytic activity
Electron paramagnetic resonance spectroscopy applied to study of carbon dioxide and oxygen adsorption on magnesium oxide powder
Experiments were performed on silicate compositions in the forsterite-anorthite-silica and forsterite-anorthite-diopside systems to determine the relative amounts of Cr(II), Cr(III), and Cr(VI) over a wide range of oxygen partial pressures from 10 to the -10th to 1 atm at 1500 and 1550 C. Redox states were measured by visible absorption spectroscopy and electron paramagnetic resonance spectroscopy and titration. It was found that Cr is present almost exclusively as Cr(III) in terrestrial basaltic liquids and as a mixture of Cr(III) and Cr(II) in lunar basaltic liquids.
Microwave apparatus and nuclear magnetic resonance and electron paramagnetic resonance spectroscopy for elucidation of molecular binding in cell surface
Organic free radical decay stability at various temperatures using electron paramagnetic resonance spectroscopy
Trapped hydrogen atoms detection in proton irradiated KCl and NaCl single crystals at 77 K, using electron paramagnetic resonance spectroscopy
Simulation of photosynthetic process in plants is accomplished by using two separate and identical optical channels that provide independently adjustable wavelengths (filters), shutter sequencing, and control intensity of illumination. In addition to experiments using electron paramagnetic resonance spectroscopy, system may be applicable to other types of research in photosynthetic field.
Electron paramagnetic resonance spectroscopy was used to study the growth of S sub H centers on magnesium oxide powder which had hydrogen adsorbed on its surface. The centers were produced by ultraviolet radiation. The effects of both radiation intensity and hydrogen pressure were also studied. At constant hydrogen pressure and radiation dose, the initial S sub H center growth rate was found to be zero order. Beyond the initial region the growth rate deviated from zero order and finally approached saturation. The results are interpreted in terms of a model which assumes that the S sub H center is a hydrogen atom associated with a surface vacancy. Saturation appears to result from a limited supply of surface vacancies.
Electron paramagnetic resonance spectrum of carbon dioxide when absorbed on UV irradiated magnesium oxide
Adsorption of CO radicals on three types of magnesium oxide using EPR techniques, noting spectrum of adsorbed radical, bonding, etc
Divalent Eu ion ground state splitting in C3h symmetry sites and associated color centers in EPR spectrum study of Eu ion doped lanthanum trichloride