SEARCH · Engineering Papers
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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Microwave apparatus and nuclear magnetic resonance and electron paramagnetic resonance spectroscopy for elucidation of molecular binding in cell surface
Paramagnetic ion interaction with its crystal lattice in applied dc magnetic field, described by function of total spin resulting from unpaired electrons within ion
Electron paramagnetic resonance spectrum of carbon dioxide adsorbed on ultraviolet irradiated magnesium oxide and formation of negative carbon dioxide radical ions
Electron paramagnetic resonance techniques for studying surface chemistry and physics pertinent to catalysis
Electron paramagnetic resonance spectrum of carbon dioxide when absorbed on UV irradiated magnesium oxide
Seed water content influence on oxygen effect as detected in gamma irradiated barley seeds and prolonged post-storage period in terms of biological effect and paramagnetic resonance signal
Microwave mixing in paramagnetic crystal using traveling wave maser with ruby as mixer element, noting frequency conversion
States density in vicinity of Fermi surface obtained from values of paramagnetic susceptibility for gold-palladium alloys
Specific heat of superconductors containing paramagnetic impurities calculated, noting effect of ordering impurity spins
Magnetic field induced hyperfine structure in mono- and divalent iron ions in magnesium and calcium oxide, showing evidence of paramagnetic resonance
Iron-sulfur proteins are primordial catalysts and biological electron carriers that today drive major metabolic pathways across all forms of life. They can access a diversity of oxidation states and can mediate electron transfer over an extended range of reduction potentials spanning more than 1 V. Depending on the protein micro-environment and geometry of ligand, co-ordination the iron-sulfur clusters can occur in different forms [2Fe-2S], [3Fe-4S], HiPIP [4Fe-4S], and [4Fe-4S]. There are several spectroscopic methods available to characterize the composition and electronic configuration of the iron-sulfur clusters, such as optical methods and electron paramagnetic resonance. This paper presents the protocols used to characterize the metal center of Coiled-Coil Iron-Sulfur (CCIS), an artificial metalloprotein containing one [4Fe-4S] cluster. It is expected that these protocols will be of general utility for other iron-sulfur proteins.
Observed paramagnetic center, effects of impurities on radiation damage of silicon, and low energy proton bombardment of silicon and gallium arsenide solar cells
Electron paramagnetic resonance data on free radical formation during mechanical fracture and gamma irradiation of polymers
Electron beam-plasma interactions, cyclotron harmonic instabilities, paramagnetic and semiconductor materials, and harmonic current generation
Electron paramagnetic resonance of lithium silicon
Organic free radical decay stability at various temperatures using electron paramagnetic resonance spectroscopy
Electron paramagnetic resonance measurements of free radical formation during cutting and grinding of polymers
Nuclear magnetic resonance and electron paramagnetic resonance techniques for aprotic electrolytes