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This chapter contains sections titled: Introduction Catalytic Hydrogenolysis of Glycerol into Diols Catalytic Oxidation of Glycerol to Valuable Chemicals Dehydration of Glycerol to Valuable Intermediates Production of Fuel and Fuel Additives from Glycerol Other Recent Utilizations of Glycerol Outlook Acknowledgments References
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Cells of 30 different strains of oral streptococci were grown in a chemically defined medium supplemented with [14C]glycerol to determine their ability to incorporate the labeled glycerol. Of the five species tested, only two, the rat-type strains (Streptococcus rattus) and strains isolated from wild rats (Streptococcus ferus), were able to incorporate the nonfermentable substrate, glycerol. For those strains capable of incorporating glycerol, the amount incorporated ranged from 0.15 to 0.43% of the cellular dry weight and followed simple saturation kinetics. The amount of glycerol incorporated depended solely on the concentration of glycerol in the growth medium. As a result, cultures exposed to low concentrations of glycerol ceased incorporation of the labeled glycerol before cessation of exponential growth.
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Abstract The effects of conventional hot‐air dehydration, dehydro‐freezing and freeze‐dehydration on colour and rehydration of apples, apricots, and peaches were investigated. The freeze‐dehydration process minimised colour changes and promoted retention of the original fruit structure. The rehydration rates of freeze‐dehydrated fruits were more rapid than those associated with other dehydration processes studied.
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