Bacillus polymixa 1 變株の生成する Bacterial Polysaccharide の研究 (第5報) : Ca-polysaccharide及びCa-free polysaccharide の性質

概要

論文の詳細を見る
We have dealt with the properties of the refined Ca- and Ca-free materials of the polysaccharide (previously reported). The results are as follows : 1) Both Ca- and Ca-free materials are completely hydrolyzed with 2〜6% H_2SO_4 in 4 hrs at 100℃, while with HCl above 2%, the hydrolyzate tends to be further decomposed with formation of methylfurfural. 2) The viscosity of the aqueous solution of Ca-polysaccharide is extremely high, but at lower pH (about 2.0), it decreases remarkably at every concentration and approaches to that of Ca-free material. The viscosities of Ca- and Ca-free materials are not destroyed within the temperature range of 10〜70℃. 3) The mean molecular weight of Ca-free polysaccharide is of 70,000 order, when it is determined by the viscosity and osmotic pressure of the aqueous solution.
社団法人日本生物工学会の論文
1954-09-15