Meanwhile Gustavus Adolphus had landed in Germany, and the elector had refused to allow him to cross the Elbe at Wittenberg, thus hindering his attempt to relieve Magdeburg.
Meyer (Ber., 18 94, 2 7, p. 510 et seq.) showed that in benzenoid compounds ortho-substituents exert a great hindering effect on the esterification of alcohols by acids in the presence of hydrochloric acid, this hindering being particularly marked when two substituents are present in the ortho positions to the carboxyl group. In such a case the ester is best prepared by the action of an alkyl halide on the silver salt of the acid, and when once prepared, can only be hydrolysed with great difficulty.
Dusty studied the scenes on the screens of his command center, agitated by the weather hindering their ability to deal with Talon's vamps.
Canvas diaphragms were used to prevent the acid formed by electrolysis at the anode from mixing with the cathode liquor, and so hindering deposition.
It is moreover an astringent to the tissues, hindering the further discharge of fluid.