RYOTO蔗糖酯在乳制品中的应用

<正> RYOTO蔗糖酯是三菱化学食品株式会社的产品,也是食用乳化剂的顶级品牌品。它是由蔗糖和天然植物脂肪酸通过酯化合成的具有安全性的非离子表面活性剂。     

蔗糖酯的开发和应用

介绍了蔗糖酯国内外的发展概况，蔗糖酯的性能，在食品、化妆品、洗涤剂军行为方面应用的前景，市场开发现状和展望，综述了蔗糖酯及多糖酯的合成与生产新技术。     

蔗糖酯的应用

蔗糖酯是一种高活性的非离子表面活性剂。能降低水的表面张力，具有乳化、分散、增溶、抗氧化、杀菌、防晶析等多种功能。其在人体内可分解成蔗糖和脂肪酯，而为机体利用，且安全性高，对皮肤和粘膜无刺激。故广泛应用于食品、药品和日化产品中。     

离子液体溶剂下蔗糖酯合成研究

采用离子液体BMIMCl为溶剂,研究蔗糖与硬脂酸甲酯反应特性,考察物料摩尔比、反应温度、反应时间、催化剂用量及离子液体重复利用次数对蔗糖酯(SE)产率影响。试验结果表明:在硬脂酸甲酯/蔗糖最佳摩尔比为3:1;反应时间为3h;反应温度为130℃;催化剂用量为(wt.)3%,此时产率最高,可达91.80%;试验结果还表明,其共溶剂离子液体可重复利用,经3次利用后SE产率仍在75%以上。     

中性皂熔融法合成蔗糖酯的研究

本法以氢氧化钾和硬脂酸乙酯生成的脂肪酸皂为乳化分散剂，使蔗糖和硬脂酸乙酯在熔融物系中直接发生酯交换反应合成蔗糖酯。适宜的反应条件为：蔗糖：硬脂酸乙酯：氢氧化钾：碳酸钾（催化剂）的摩尔比为1：1．5：0．5：0．036；反应温度130℃，压力（1．33－9．33）×103Pa搅拌下反应4小时。所得粗产物的酯得率89．9％。     

蔗糖酯的合成工艺及其应用研究

作为一种新型的表面活性剂 ,蔗糖酯具有广泛的工业用途。本文综述了国内外蔗糖酯的研究进展 ,包括蔗糖酯的合成工艺、纯化检测方法、工业用途和开发现状 ,最后还提出了蔗糖酯的研究开发设想     

逆相转移催化合成葵花籽油蔗糖酯

先由食用葵花籽油和甲醇在碱性催化剂条件下酯交换反应制得脂肪酸甲酯,然后脂肪酸甲酯与蔗糖通过水溶剂法,以逆相转移催化剂DMAP催化制备蔗糖脂肪酸酯.通过对酯糖摩尔比、催化剂用量、反应温度、反应时间进行考察,确定最佳合成条件为:酯糖摩尔比2.5∶1,催化剂用量4％,反应温度 85℃,反应时间7h.在最佳合成条件下,葵花籽油脂肪酸甲酯的转化率高达65.32％,所得产品具有良好的表面活性,其临界胶束质量浓度(CMC)为6.5 g/L,表面张力为27.41 mN/m,乳化力为79 s,浊点指数为7.2 mL,HLB值为10.1,碘值(Ⅰ)为126.9 g/100 g.     

相溶法蔗糖酯的合成与分析

由食用大豆油和蔗糖为原料,在一定的工艺条件下制备的蔗糖酯,通过高效液相色谱分析,证明本试验合成的蔗糖酯主要以低酯为主。由峰面积可计算出甲酯为17．34％,蔗糖酯为82．66％。由紫外吸收光谱分析证明试验制备的蔗糖酯属于混合物,红外光谱的分析是分子中存在羰基的有力证据。     

相溶法合成蔗糖酯的工艺研究

由食用大豆油在碱性催化剂存在下酯交换合成脂肪酸甲酯,进一步用脂肪酸钾作反应亲和促进剂,使反应体系形成均相,通过正交试验对配料比、温度、时间和催化剂用量等合成条件进行考察,确定最佳合成条件为甲酯与蔗糖的物质量比为1：1.2、反应温度为140℃、反应时间为3h、催化剂用量为20%,对酯化度、酸值、皂化值等一系列测试,证明该工艺条件可行。     

新型乳化剂-蓖麻醇酸蔗糖酯的合成与应用研究

本文采用新的微乳化法,以蔗糖和精制蓖麻油为主要原料,选择合适的催化剂,在短时间内完成蓖麻醇酸蔗糖酯（简称蔗糖酯或SE）的合成,该产品具有品质优良,成本较低,工艺先进等优点.利用该蔗糖酯及其复配制剂在防止面包老化的研究中效果显著.     

Assessment of process parameters on the production of diglycerides rich in omega-3 fatty acids through the enzymatic glycerolysis of fish oil

The main objective of this work is to present new experimental information concerning the effect of relevant process parameters related to the production of diglycerides by enzymatic glycerolysis of fish oil. Reaction products can be applied as ingredients in food industry, joining the emulsifying properties of partial glycerides along with the nutritional benefits attributed to the omega-3 fatty acids. From preliminary reactions, conversion was higher for a solvent- and surfactant-free system but the long time to reach appreciable amounts of diglycerides may be a drawback for practical purposes. To overcome this problem, the addition of tert-butanol revealed to be relevant, leading to high diglycerides contents in short times. The system containing Tween 65 led to the highest amount of diglycerides. This study described the feasibility of enzymatic synthesis of diglycerides rich in EPA and DHA in short reaction times as well by using a more environmentally friendly process.     

The polymorphism of diglycerides

The polymorphism of 1,3-dipalmitin, 1,2-dipalmitoyl-sn-glycerol, 1.2-dipalmitoyl-rac-glycerol has been examined by X-ray diffraction, IR spectroscopy and Raman spectroscopy and differential scanning calorimetry. The respective spectra and thermographs are presented for these polymorphs. Optically active 1,2-diglycerides exhibit very different thermal behaviour from the optically inactive 1,2-diglycerides. A novel HPLC system was devised for the separation of the diglycerides.     

多不饱和脂肪酸对大鼠大脑细胞膜脂肪酸组成的影响

研究多不饱和脂肪酸(PUFAs)对发育期大鼠大脑细胞膜脂肪酸类别与含量的变化。将56只初断乳雄性SD大鼠随机分为阴性组、必需脂肪酸(EFA)缺乏组、鱼油组[300mg/(kg·d)]、紫苏组[2.45mL/(kg·d)]、α-亚油酸组[1.32g/(kg·d)]、核桃组[2.45mL/(kg·d)]与红花组[1.65g/(kg·d)]。连续饲养8周,提取大脑组织总细胞膜,并使用气相色谱-质谱联用技术检测其脂肪酸的种类与含量。结果表明,各组大鼠脂肪酸组成无差别;与阴性组比较,各组均能显著提高n-3PUFAs的含量;紫苏组、核桃组和红花组能显著降低n-6PUFAs的含量,增加饱和脂肪酸的含量;紫苏组、核桃组、红花组和鱼油组能显著降低单不饱和脂肪酸的含量。说明PUFAs能改变大鼠大脑细胞膜的含量,但对其类别影响不大;短期缺乏EFA对细胞膜脂肪酸的类别与含量无影响。     

The natural occurrence of unusual fatty acids Part 3. Acetylenic fatty acids

Acetylenic compounds especially acetylenic fatty acids (C₁₇ to C₂₁) were first of all identified in higher plants. Their structure is very different with regard to the number of the double and triple bonds per molecule, and the functional groups. The mechanism of the biogenesis and the influencing factors are not definitely clarified. A side pathway of the biogenesis of the saturated fatty acids is supposed. Various physiological effects of the acetylenic fatty acids are presented.     

火麻油总脂肪酸及sn-2位脂肪酸组成分析

采用气相色谱法测定火麻油中总脂肪酸和sn-2位脂肪酸的组成和含量,并与其他9种常见植物油进行对比,旨在为火麻油的营养价值研究提供基础数据。结果表明,3种不同品牌火麻油主要由软脂酸（C16∶ 0）、硬脂酸（C18∶ 0）、油酸（C18∶ 1n9c）、亚油酸（C18∶ 2n6c）、α-亚麻酸（C18∶ 3n3）组成,其中多不饱和脂肪酸含量为70.57%~78.73%,sn-2位多不饱和脂肪酸含量为77.61%~83.74%,说明以亚油酸和α-亚麻酸为主的多不饱和脂肪酸更易连接在甘三酯结构的sn-2位上。另外,对比其他9种常见植物油,火麻油总脂肪酸和sn-2位脂肪酸中油酸含量均最低,亚油酸和亚麻酸含量较高;多不饱和脂肪酸含量均最高,分别为77.90%和83.74%;n-6系脂肪酸与n-3系脂肪酸比例分别为3.7∶ 1和4.2∶ 1。研究结果表明,火麻油是一种不饱和脂肪酸含量较高且易于被人体吸收代谢的植物油。     

The natural occurrence of unusual fatty acids. Part 1. Odd numbered fatty acids

A literature review of the natural occurrence and effects of odd numbered fatty acids (C₁₁ to C₃₃) in microorganisms, plants and animals is presented. Not only saturated and unsaturated odd numbered fatty acids but also unsaturated fatty acids with unusual position of double bonds seem to be ubiquitous in small amounts.     

Competitive oxidation of fatty acids. Effect of the carboxylic group and of saturated fatty acids

The kinetics of the oxidation of mixtures of methyl linoleate-linoleic acid and of mixtures of pelargonic acid-linoleic acid have been studied at 30°C by the oxygen absorption method. During the oxidation of methyl linoleate-linoleic acid mixtures, a linear relationship was found between the overall monomolecular rate constant, Km, and the composition of the sample. When the reaction entered the bimolecular period, a strong prooxidant effect was found when the molar fraction of methyl linoleate was above 0.50. With mixtures of pelargonic acid-linoleic acid, it was found that the saturated fatty acid behaved as an inert diluent throughout all the levels of oxidation studied and for all the range of molar fractions.     

食品中的反式脂肪酸

反式脂肪酸是一种具有反式构型的不饱和脂肪酸,现代研究表明,它对心血管疾病、糖尿病及胎儿生长发育等会产生不利影响。本文从反式脂肪酸的结构、性质、食物来源及如何降低TFA等方面进行综述。     

RYOTO蔗糖酯在糖果类产品及奶油类产品中的应用

RYOTO蔗糖酯是三菱化学食品株式会社的产品,也是食用乳化剂的顶级品牌品.它是由蔗糖和天然植物脂肪酸通过酯化合成的具有安全性的非离子表面活性剂.