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Stimulation Of Amorphizing Reactions In Co-Si Multi-Layers, Jeanne K. Jackson
Stimulation Of Amorphizing Reactions In Co-Si Multi-Layers, Jeanne K. Jackson
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Co-Si multi-layer specimens do not normally amorphize. To possibly stimulate amorphization, Ti was added by evaporation and the specimens were annealed at 300 and 400 degrees Celsius. The results showed that amorphization occurred at 400 degrees Celsius in the presence of Ti, but did not occur at 300 degrees Celsius. Further research would be necessary to conclude whether the amorphization was stimulated by the addition of Ti or the temperature increase.
Cyclodextrin Stationary Phases For The Gas-Solid Chromatographic Separation Of Hydrocarbons, Chris A. Monge
Cyclodextrin Stationary Phases For The Gas-Solid Chromatographic Separation Of Hydrocarbons, Chris A. Monge
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Cyclodextrin, bonded to silica gel and used as a gas-solid chromatographic stationary phase provides a practical and efficient means for separating a wide variety of C1-C7 hydrocarbons at ambient to elevated temperatures. Conditioning the columns at high temperature (300°C) for several hours increased efficiency and resolution. The adsorption of these light hydrocarbons involves a multiple retention mechanism. Evaluation of the columns and an analogous silica gel column with hydrocarbon standards is reported. Capacity factors and chromatograms are presented for these GSC stationary phases.