Swiss astronomer, born in Varna, Bulgaria, on 14 February 1898. He was an original thinker, with many important contributions in theoretical and observational astronomy. His father was the Bulgarian ambassador to Norway. He received an advanced... — full article
ZymosanA chemical compound - glucan (polysaccharide). It is prepared from yeast (Saccharomyces cerevisiae) cell wall and consists of protein-carbohydrate complexes.... — full article