The Effect of Alkaline Treatment on Physicochemical Properties of Cyclobalanopsis glauca Starch

• Main Authors: Chun-Ming Chung, 鍾俊名
• Other Authors: Chung-Yi Huang
• Format: Others
• Language: zh-TW
• Published: 2016
• Online Access: http://ndltd.ncl.edu.tw/handle/07535267782929509366

碩士 === 國立宜蘭大學 === 食品科學系碩士班 === 104 === Fagaceae is the major plant in Taiwan’s forest distributed below 2000 m altitude areas. Acorn, the nut of plant, of Cyclobalanopsis glauca (Cgla) was examined for physicochemical properties of starch. The flour of cotyledons of acorn was treated with 0.125, 0.25 and 0.5% NaOH to obtain starch portion Cgla125, Cgla250 and Cgla 500 respectively and investigate the their resistant starch (RS) levels. Results showed that the total starch level was 35% with 38% of amylose. The chemical composition of Cgla250 was 0.15% crude protein, <0.006% total polyphenol, 27% RS with no lipids. When sample treated with moist-heat pressure, pullulanase and cold storage, the RS level was increased to 37%. The chemical composition of Cgla125 was 1% crude proteins, 0.02% total polyphenol and 27% RS. The chemical composition of Cgla500 is similar to that of Cgla250, however the RS content is only 16%. With the best results of Cgla250, we used 0.25% NaOH treatment for other two species Cyclobalanopsis globose (Cglo) and Castanea mollissima (Cm). The results showed that RS in Cgla is the highest (30%) followed by Cglo (17%) and Cm (15%) With the enhanced treatment, the RS levels were increased to 51%, 49% and 47%, respectively.