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We study the behaviour of surface waves propagating along the ionopause of the planet Mars and derive the onset criteria for unstable Kelvin-Helmholtz modes and negative energy waves at the Martian ionopause. Growth rate of unstable Kelvin-Helmholtz mode decreases with wavelength. The backward propagating waves became negative energy waves for the ionosheath velocity higher than critical velocity...
Dimerization of 1-butene in the liquid phase was studied at relatively mild conditions, 523 K under 20 bar over both microporous and embedded microporous mesoporous catalysts. Embedded catalysts were prepared by introducing Beta zeolite nuclei into the gel synthesis of mesoporous material. Three different embedded catalysts with different acidities were prepared and characterized by XRD, nitrogen...
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