Prepn. and storage of platelet concentrates from buffy-coats

摘要

Procyanidol oligomers almost free from monomers are obtained by subjecting the vegetal extracts (for instance from Vitis vinifera) to ultrafiltration on membranes of cut-off from 3.000 to 600, or to a selective extraction with mixtures of esters (or ethers) and aromatic hydrocarbons.