The steril carbonate crystals of appropriate bulk-density were prepared by the methods of solvent-out crystallization in optimized condition,and the uniformity of the mixing cephalosporin and steril carbonate was improved.

These intermediates include the products for penicillin, cephalosporin and lactamase inhibitors.

Construction and analysis of AFLP fingerprinting in Nancy holls of sweetpotato;

Differences in ground vegetation and soil characteristics in adjacent birch and spruce stands of southern Sweden;