1990, 9(4).
Abstract:This paper studied the reaction mechanism of proteolytic and pectic enzymes in soymilk processing technology, The results of treating insoluble soybean residue with two enzymes show that the proteolytic and pectic enzymes cau transfer the insoluble protei
Jiang Xiongtu Tang Jian Lou Hedong
1990, 9(4).
Abstract:本文对食品塑膜包装材料中增塑剂邻苯二甲酸二辛酯(DEHP)的气相色谱测定法进行了研究,提出用索氏萃取法以乙醚萃取DEHP或用甲醇沉淀法将塑料基质从试液中除去,分离出DEHP,然后以邻苯二甲酸二戊酯为内标,在交联甲基硅酮毛细管柱上,用FID检测器作气相色谱定量测定。萃取法和沉淀法的平均回收率分别为96.5%和85.3%。两方法的变异系数约为2%,最小检测量约2×10~(-3)μg。沉淀法的回收率略低于萃取法,因此在沉淀过程中,DEHP有被沉淀物包留的可能,若沉淀小心进行,避免产生凝絮状沉淀物则包留现象可获得改善。
1990, 9(4).
Abstract:In this paper, the strctures and physical-chemical properties of acetylated distarch phosphate(ADSP), Which was compound-modified starch with cross-linking and esterification, were reported. The results showed: the capacity that starch molecules absorbed
Shen Hui Liu Danghhi Cheng Hongzhuan
1990, 9(4).
Abstract:为了解决饲料中FeSO_4XH_2O对维生素A的严重影响问题,作者采用多种包被物质对FeSO_47H_2O进行包被处理。通过大量实验,筛选出了较为理想的“包被剂Ⅰ”和“包被剂Ⅱ”,用这两种包被剂包被FeSO_47H_2O(未脱结晶水)制成了饲用铁原新产品Ⅰ、产品Ⅱ。在40℃条件下存贮30 b后,产品Ⅰ、产品Ⅱ分别使V-A保留98.68%和100.01%,使亚铁离子Fe~(2+)保留99.46%和99.87%;而未经包被处理的FeSO_47H_2O则在相同条件下,V-A和Fe~(2+)仅留存0.20%和37.89%。经过实验比较。产品Ⅰ、产品Ⅱ皆优于美国、日本、意大利等国的同类饲用FeSO_47H_2O产品。
Dai Jun Cheng Hongzhuan Wang Dehe
1990, 9(4).
Abstract:This paper reports a simple and rapid methos of simultaneous determination of water-soluble multivitamins in formula feed by HPLC. A programmable multiwavelength detector is used to change both wavelength and sensitivity of-detection automatically in orde
1990, 9(4).
Abstract:An adsorption isotherm and the interfacial tension and interfacial potential equations at the interface of crude Oil/alkaline solution are established based on chemical and phase equilibrium principles and Gouychapman theory of the diffuse double layer. T
1990, 9(4).
Abstract:A Computer-aided test system has been discussed. This system is composed of IBM-PC and a several instruments with GPIB. It can be used to measure voltage, current and resistance etc. and also to analyse the results. Both the hardware and software have bee
1990, 9(4).
Abstract:This paper generalizes the theorem of differential middle value to both open region and unbounded region.
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