Binding of Taurocholate by Pectin in the Presence of Calcium Ions

Binding of taurocholate by pectin was examined in vitro, using low-methoxyl pectin and calcium lactate. Water in calcium pectate gel was partially separated from the gel by filtration through a glass-filter. Taurocholate bound by pectin was calculated after measurement of taurocholate in the filtrate by the UV absorption method. The amount of taurocholate bound by pectin increased linearly with increase in pectin concentration but independent of time. One gram pectin bound a maximum of 6.0 μmole of taurocholate.     

过二硫酸铵法从LiMn_2O_4中萃取锂及所获得的吸附剂对锂同位素的选择性

本文对采用过二硫酸铵 (NH4) 2 S2 O8法从 Li Mn2 O4中萃取锂离子进行了研究 ,并就所获得吸附剂 (Mn O2 (Li) )的特性 ,特别是对于分离锂同位素的能力进行了测试。在良好的控制条件下 ,(NH4) 2 S2 O8是一种优良的锂吸附剂 ,它具有非常高的锂萃取度 ,同时保持锰的最小溶解性。所制备的 Mn O2 (Li)在 2 5°C时最大的 7Li/ 6Li同位素分离因子为 1 .0 1 4,它是那些商品有机离子交换剂的几倍。     

Development of integrated production scheduling system for iron and steel works

The primary purpose of production scheduling at an integrated iron and steel works is to establish and execute the optimum production schedule that can improve both productivity and yield at each of the plants such as the steelmaking plants and rolling mills, while giving first consideration to the keeping of the date of delivery

However, it is by no means a simple matter to establish and control an integrated or consistent production, schedule covering about ten production processes for various products with an annual output of 6 million tons or more, or about 26 000 orders monthly

In our system-development efforts, therefore, we made the system under study simple and usable in practical applications, designed a scheduling simulator capable of policy selection, and thereby successfully developed an integrated production scheduling system centring around the scheduling simulator.     

Determination of Pectin in the Presence of Food Polysaccharides

A selective and specific method to assay pectin in mixtures of polysaccharides using pectinase was developed. The mixture was extracted with 99.5% (v/v) ethanol to remove gum arabic and any other ethanol-soluble saccharides and polysaccharides; pectin was then hydrolyzed with pectinase. The hydrolyzed pectin was recovered by solution in 80% (v/v) ethanol and assayed by the m-hydroxybiphenyl method. The assay was not affected by agar and gums of tragacanth, karaya, guar, and locust bean in the mixture. Alginate and xanthan gum in the mixture repressed the development of color by this method, but this effect could be offset by modification of the pectinase reaction system.