Abstract: Mixotrophic fermentation method performed to make one or more bioproducts such as alcohols, organic acids of less than 7 carbons, acetone, 2,3-butanediol and mixtures thereof with a microorganism. The mixotrophic fermentation method includes providing an isolated organism and providing a first feedstock and a second feedstock for use in a fermentation medium. The first feedstock includes a carbon source that is metabolized by the native form of the organism at a rate of less than 0.01 g/hr/g cell mass, and the second feedstock includes CO, CO2, carbonate, bicarbonate, H2, glycerol, methanol, formate, urea or mixtures thereof. The mixotrophic fermentation method also includes culturing the organism in the fermentation medium, whereby both feedstocks are metabolized and a fermentation broth is formed, the broth having at least one bioproduct. Optionally, the bioproduct may be separated from the broth.

Abstract: A silanized surface, stable selective dehydration catalyst for dienes production, a method for producing a silanized surface, stable, selective dehydration catalyst, and a method for dehydrating at least one of an alkenol and a diol to a diene. The present invention also relates to the fermentation of sugars to afford bio-alkenols that are then separated and converted to a diene using a dehydration catalyst and a method for converting alkenols or diols to dienes with high selectivity and conversion. The dienes are useful in preparing synthetic rubber, plastics copolymers, and fuels.