Direct allylic etherification of unactivated alcohols occurs regio- and stereoselectively under mild, gold(I)-catalysed conditions.

By 1961 the situation had become reversed. The fibre consumption of the highest income groups relative to that of the lowest increased steadily during this period. When compared to the lowest two social classes the highest two with the higher overall fibre intake emerged with a lower incidence ofCHD over the twenty years.73 Finally, in a prospective secondary prevention study, Daan Kromhout and...

Directed evolution approaches were used to construct a thermally stabilized variant of Erwinia chrysanthemi pectin methylesterase A. The final evolved enzyme has four amino acid substitutions that together confer a T(m) value that is approximately 11 degrees C greater than that of the wild-type enzyme, while maintaining near-wild-type kinetic properties. The specific activity, with saturating s...

The effect of sodium tetraborate (Na(2)B(4)O(7), borax) on the thermal property of frozen aqueous sugar and polyol solutions was studied through thermal analysis. Addition of borax raised the thermal transition temperature (glass transition temperature of maximally freeze-concentrated solutes; T(g)') of frozen sucrose solutions depending on the borax/sucrose concentration ratios. Changes in the...