In the title compound, C(10)H(11)NO(5), the six-membered 1,3-dioxane ring displays a chair conformation, with the hydr-oxy and 2-nitro-phenyl groups in equatorial positions, which minimizes steric hindrance. In the crystal, mol-ecules are linked into chains along the b axis by inter-molecular O-H⋯O hydrogen bonds.

immobilized lipoamide dehydrogenase in 30 % (v/v) dioxan. The rate constants for inactivation in dioxan, like those for thermal inactivation at 90°C, increase with increasing distance from the matrix and eventually approach that for the inactivation of the native enzyme in 30% (v/v) dioxan, i.e. 0.01 min-'. These data can be rationalized by the fact that the hydrophilic Sepharose matrix probabl...

The title compound, C(22)H(22)O(5), crystallizes with two independent mol-ecules in the asymmetric unit, both of which possess pseudo-C(s) symmetry. The central 1,3-dioxanone rings have envelope conformations, with the C atom bearing the two methyl groups at the flap. The benzene rings of the meth-oxy-benzyl-idene units, attached in the 4- and 6-positions on the central 1,3-dioxanone rings, are...

LUCITE NOT A SUBSTITUTE FOR CANADA BALSAM WHEN MOUNTING MICROSCOPE SLIDES' LUCITE2 is a crystal-clear methyl methacrylate polymere which has a refractive index nearly the same as glass and is readily soluble in dioxan. Dioxan3 has proven useful as a dehydrating agent for the preparation of sections and objects to be mounted for observation with the microscope. Thus with the Lucite in dioxan sol...