نتایج جستجو برای: gas chromatographymass spectroscopic studies
تعداد نتایج: 1684878 فیلتر نتایج به سال:
In life sciences, diastereomeric chiral molecule/chiral receptor complexes are held together by a different combination of intermolecular forces and are therefore endowed with different stability and reactivity. Determination of these forces, which are normally affected in the condensed phase by solvent and supramolecular interactions, can be accomplished through the generation of diastereomeri...
The ultraviolet and visible emission spectra from excimer laser-produced silicon plasmas were studied and the ablation rate measured as a function of laser energy density and wavelength. A spectroscopic investigation of the laser-produced plasma showed Si I, Si II, and Si III spectral lines with higher laser intensity causing a higher degree of ionization in the plasma. Both timeintegrated and ...
A probe has been designed, constructed, and successfully used to inject methane into the DIII-D lower divertor in a manner imitating natural release by chemical erosion. This porous plug injector (PPI) probe consists of a self-contained gas reservoir with an integrated pressure gauge and a 3 cm diameter porous surface through which gas is injected into the lower divertor of the tokamak. The pro...
Emission spectra of constituent gas species from glow discharge plasmas using argon-helium, krypton-helium, argon-krypton, and krypton-argon gas mixtures were analyzed to elucidate collisional energy transfer between these gas species occurring in the plasma. In the argon-helium mixed gas plasma, the enhancement or quenching of particular Ar II lines was observed when helium was added to an arg...
The relationship of sedimentary organic matter, oil-gas and sandstone-type uranium (U) deposits is the key problem U-mineralization. Whether migrate hydrocarbons participate in U-mineralization still a controversy. Typical U Erlian Basin northeast China have been investigated through detailed petrography, mineralogical, micro spectroscopic, geochemical C-isotope studies. Petrographic observatio...
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