1993, 12(1).
Abstract:酶法从牛骨中制取照相明胶的新工艺与传统的碱法相比具有生产周期短、好胶率高以及产品质量相近等特点。应用差热分析研究了胶原蛋白在骨头预处理过程中的变性情况;用颗粒分布仪研究了骨素的溶胀作用;用凝胶过滤色谱技术测定了明胶分子量的分布;应用响应曲面分析优化了酶解工艺条件即1g骨素粉加1u的蛋白酶于27℃,pH7.5左右下水解6h。并对该工艺所得明胶产品的理化性能和照相性能进行了测定,结果表明该产品可用作国标中惰(Ⅰ)型照相明胶。
Chen Xielai Wang Rongmin Gu Yeling Shen Guohuai Tong Danjian
1993, 12(1).
Abstract:The whole-cell fatty acids of 6 species (14 strains), of Lactobacilli and 3 species (3 starins) of Leticonostocs were analyzed by gas chromatography-mass spectrometric method. Based on the cellular fatty acid components and the forms of the characteristic
Wu Xing Zhang Tao Zhu Wenchang Zhang Kechang
1993, 12(1).
Abstract:The fermentation of corncob hydrolysate to xylitol was studied. The results show that the glucose and extraneous chemicals in the corncob hydrolysate have found to have suppression inhibitory effects to the xylitol fermentation. Some additives were effect
1993, 12(1).
Abstract:Initial investigations suggested that it is possible and convenient to measure flour whiteness by a tristimulus colorimeter. The results of this study show that the tris-timulus instrument is sensitive to addition of lower grade flours and bran to a base
1993, 12(1).
Abstract:用紫色胶树脂环状萜烯酸的代表壳脑酸的衍生物模拟了紫胶漂白过程中紫胶树脂与含卤化合物的反应。跟踪壳脑酸二甲酯与溴反应的结果表明,壳脑酸与次氯酸钠的反应是游离氯对碳碳双键的加成反应,室温下即可快速发生,反应的主要产物是α,β-二溴壳脑酸二甲酯。脱卤处理的产物是β-溴壳脑酸二甲酯。这表明α位卤素比β位卤素容易脱落,是破坏漂白胶贮存性的根本原因。α位卤素脱去后,β位卤素上的孤对电子与碳碳双键的π电子产生p-π共轭,使之在通常条件下难以脱去。从而揭示了紫胶漂白过程中通过脱卤延长其贮存性的内在原因。
1993, 12(1).
Abstract:This paperdescribed a design method for pattern laying-in stitCh on 4-tracks single knit circular knitting machine according to structural feature of this machine is de-scribed. Based on the method, pattern design and process design for blister design and
Fei Rongchang Xu Baoren Jiang Bingzin
1993, 12(1).
Abstract:In this paper, we extend and improve the rectangle formula of definite integrals'approximate calculation.
Copy Right：Editorial Board of Journal of Food Science and Biotechnology
Address：No. 1800, Lihu Avenue, Wuxi 214122, Jiangsu Province,China PostCode：214122
Phone：0510-85913526 E-mail：xbbjb@jiangnan.edu.cn
Supported by:Beijing E-Tiller Technology Development Co., Ltd.
