デンプンの溶媒としてのチオシアン酸アンモニウム水溶液の検討 (チオシアン酸アンモニウムによるデンプンの溶解およびその溶液的性質について-1,2-)

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概要

• 論文の詳細を見る

• The ability of aqueous NH4SCN solution to disperse starch was examined. The results indicate that the ability increases as the salt concentration increases, but decreases through a maximum in the highly concentrated solution. Reduced viscosity measurements showed this maximum to be in the 30 to 40% of NH4SCN, and in the lower concentration for amylose than amylopectin. Changes of partial specific volumes showed the similar tendencies. The dissolution of starch granules into the NH4SCN solution was examined by the ultracentrifugation, and the difference was notable between kinds of starch. The starch granules of root crops give solution in 20% NH4SCN, and those of grains dissolve only in the concentrated solution of 30 to 40%. Viscosity and sedimentation experiments showed the unstability of starch components in the solution at an elevated temperature, they begin to degrade above 80°C and remarkably at higher temperatures. Starch granules are scarecely soluble under the mild conditions, however, amylose and amylopectin prepared from starch are readily dispersed into the NH4SCN solution. The solution obtained was shown to be neither associated nor degraded by viscosity measurements between 25 to 50°C, and is stable for long time under room temperature and not damaged enzymatically. Therefore aqueous NH4SCN solution is usable as a solvent for amylose and amylopectin in the physico-chemical measurements, especially suitable for the diffusion measurement unlike dimethylsulfoxide.

• 社団法人 日本農芸化学会の論文

著者

• 富田 繁

  東京工業試験所

• 寺島 一生

  東京工業試験所

関連論文

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• 溶液中のデンプンによる吸着および溶媒和について
• デンプンの溶媒としてのチオシアン酸アンモニウム水溶液の検討 (チオシアン酸アンモニウムによるデンプンの溶解およびその溶液的性質について-1,2-)

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