微波处理油料对油脂品质影响的研究进展

介绍分析了微波处理油料对出油率、原料本身结构、油脂主要理化指标、油脂脂肪酸组成及微量成分和油脂氧化稳定性的影响.结果指出微波处理油料可提高出油率和油脂氧化稳定性,增加营养成分含量,值得推广应用.     

油脂的自动氧化和氧化稳定性及检测方法

论述了油脂自动氧化的机理和油脂氧化稳定性的测定原理，并对油脂氧化稳定性的测定方法作了简要介绍。     

油脂氧化及其氧化稳定性测定方法

论述了油脂氧化的机理和油脂氧化稳定性的测定原理,按测定参数的不同对油脂氧化稳定性的常用测定方法进行了分类和介绍,旨在为选用合理的油脂氧化稳定性测定方法和今后开发更新的测定方法提供参考。     

不同微胶囊制备工艺在油脂中的应用研究进展

油脂中不饱和脂肪酸非常容易氧化,油脂氧化危害消费者健康,甚至引发食品安全问题。微胶囊技术可以减缓或防止油脂中的不饱和脂肪酸氧化。综述了油脂的不饱和脂肪酸组成,并介绍了国内外油脂微胶囊的不同制备方法,为油脂微胶囊的研究及应用提供参考。     

油脂氧化与抗氧化技术

对油脂贮存过程中的氧化机理、氧化反应历程和产物进行了分析,介绍了油脂抗氧化技术的原理和常用抗氧化剂的性能,提出应科学合理地使用抗氧化剂,减缓油脂氧化,保证油脂的食用安全。     

油脂的自动氧和氧化稳定性及检测方法

论述了油脂自动氧化的机理和油脂氧化稳定性的测定原理，并对油脂氧化稳定性的测定方法作了简要介绍。     

油脂的氧化机理及天然抗氧化物的简介

本文简要介绍了油脂主要的三种抗氧化方式自动氧化,光氧化和酶氧化的氧化机理,以及影响油脂氧化的主要因素。并对高效无毒的天然抗氧化剂进行简要的分类介绍。     

维生素E抗油脂氧化的功能探讨

抗氧化功能是维生素Ｅ的一种基本功能。维生素Ｅ特殊的化学结构与性质使得它既能抗油脂自动氧化，又具有一定的淬灭１Ｏ２的能力。本文根据目前公认的油脂氧化机理，就维生素Ｅ抗油脂氧化的机理与具体功能进行了探讨，并且介绍了一些常见油脂中的ＰＵＦＡ与维生素Ｅ的水平。     

热重分析法在油脂氧化稳定性研究中的应用

主要介绍了热重分析法在食用油脂氧化稳定性定性分析中的应用,检测了菜籽油、玉米油、调和油3种油脂的氧化分解温度,探讨了升温速率、保护气氛对油脂氧化分解温度的影响;通过油脂的热重分析法等温实验,观察了油脂的氧化诱导时间。实验表明:菜籽油的氧化稳定性优于玉米油和调和油;相同条件下,升温速率越快,氧化分解温度越高;在氮气气氛下,油脂的氧化稳定性更好。热重分析方法采样量少、操作方便、效果明显,可以应用于油脂生产过程的质量监控和抗氧化剂的开发研究。     

油脂抗氧化包装发展分析

油脂是人们日常生活中必不可少的营养物,而油脂却极易氧化变质,所以油脂的抗氧化包装一直是业界研究的重点问题之一。介绍油脂氧化的机理、油脂抗氧化包装的发展历程、对现存主要的抗氧化包装工艺进行分析,提出通过物理工艺与化学工艺相结合的方法是未来油脂抗氧化包装的发展趋势。     

"云麻一号"大麻籽仁油粉末油脂制备与表征

对"云麻一号"大麻籽仁油的乳化工艺进行了优化,并对喷雾干燥得到的粉末油脂进行了理化特性及贮藏稳定性评价.大麻籽仁油的最佳乳化条件为:乳化剂配比为蔗糖酯:单甘酯=9:1,乳化剂的HLB值为13.48,壁材用量为6.7%,明胶/麦芽糊精比为4:6,乳化剂用量为0.9%、大麻籽仁油与壁材比为3:4,在此条件下微胶囊化效率达到91.24%,粉末油脂产品含油率35.97%,表面含油3.15%,产品呈现乳白色表面光滑的球状,具有良好的贮藏稳定性.     

Oxidative stability of fish oil blended with butter.

The oxidative stability of fish oil blended with milk products was evaluated. Oxidation of the oil blend was determined by peroxide value and rancimat test. Improved oxidative stability was observed for fish oil blended with butter. Unsalted and salted butters showed no difference in improvement of effect on oxidative stability of fish oil. No influence on oxidative stability for the fish oil was observed with butter oil, which was the oil fraction of butter. These studies suggested that the improved oxidative stability of fish oil-butter blend was due to the hydrophilic fraction of butter and that butter could improve the oxidative stability of polyunsaturated oils such as fish oil.     

膨化机入料绞龙的技术改造与应用

在油料预处理工段,膨化技术已成熟,在大豆、菜籽、棉籽、米糠等油料的加工中均有应用,在提高产量和出油率的同时降低了能耗。保持膨化机稳定工作的重要前提就是保证膨化机入料的稳定,通过对膨化机生产中的常见问题进行分析,对入料绞龙进行改造优化,经实践应用,膨化机生产的稳定性得到很大提高。     

采用固体分散体技术提高维生素E油的稳定性

目的：提高维生素E油的稳定性。方法：采用固体分散体技术将维生素E油制成固体分散体，从而提高维生素E油的稳定性。结果：用二氧化硅作为固体分散体的载体吸附维生素E油后手触无油腻感、无粘连，不用粉碎，容易过筛，稳定性好。结论：采用此方法可以提高维生素E油的稳定性，且操作简便，不影响维生素E油的检测。     

油脂体微胶囊化的研究进展

油脂体是被一层连续的单层磷脂覆盖的甘油三酯为核心的并伴有嵌入少量蛋白质的脂滴,广泛分布于油籽,特别是食用油籽中。基于油脂体的独特结构使其具有较好的物理和化学稳定性,近年来,以其作为壁材的微胶囊化技术保护食品和医药中生物活性成分已成为研究热点。因此,本文综述了油脂体组成、稳定性及其微胶囊化技术的最新研究进展,为油脂体的利用和开发提供参考。     

Stability and opacity of orange oil cloudy emulsions based on gum elemi and gum arabic

Orange oil cloudy emulsions based on naturally occurring oil-soluble gum elemi and naturally occurring water-soluble gum arabic have been prepared and evaluated. Cloud and emulsion stability, as well as the opacity of each emulsion, were recorded and compared. It was demonstrated that the emulsion stability is determined by the gum elemi/orange oil ratio, the orange oil content, and the gum arabic/orange oil ratio. The opacity is a function of the orange oil content and to a lesser extent also depends on the gum elemi/orange oil ratio. Since the gum elemi/orange oil ratio is a critical parameter affecting both opacity and stability it should be carefully chosen and controlled.
Gum arabic is not the sole emulsifier, as gum elemi also adsorbs on the oil droplets and plays a role in emulsion stability.     

油脂体稳定性影响因素及机理的研究进展

油脂体是植物储藏脂质的重要细胞器。近年来,随着对于油脂体研究的不断深入,人们发现由于油脂体具有天然的蛋白-磷脂界面层,使得油脂体能够分散在水相中形成水包油（O/W）乳化体系且具有很好的理化稳定性。人们开始尝试将油脂体应用于食品、饲料及个人护理产品等领域中。探究油脂体稳定性的影响因素及机理对油脂体的实际生产应用具有现实意义。油脂体结构的完整性及油脂体膜表面镶嵌的蛋白质是维持油脂体稳定性的决定因素。油脂体乳液的稳定性与油脂体的组成、提取方法、外源性蛋白质、温度、pH和盐浓度等条件有关。本文论述了油脂体的结构与组成、乳液稳定性和应用,为油脂体的研究及应用提供参考。     

Chemistry of deep-fat frying oils

ABSTRACT:  Deep-fat frying produces desirable or undesirable flavor compounds and changes the flavor stability and quality of the oil by hydrolysis, oxidation, and polymerization. Tocopherols, essential amino acids, and fatty acids in foods are degraded during deep-fat frying. The reactions in deep-fat frying depend on factors such as replenishment of fresh oil, frying conditions, original quality of frying oil, food materials, type of fryer, antioxidants, and oxygen concentration. High frying temperature, the number of fryings, the contents of free fatty acids, polyvalent metals, and unsaturated fatty acids of oil decrease the oxidative stability and flavor quality of oil. Antioxidant decreases the frying oil oxidation, but the effectiveness of antioxidant decreases with high frying temperature. Lignan compounds in sesame oil are effective antioxidants in deep-fat frying.     

Changes in phenolic compounds and Rancimat stability of olive oils from varieties of olives at different stages of ripeness

BACKGROUND: Recently, diets rich in natural foods and food‐derived components, such as phenolic compounds, have received a great deal of attention because they are perceived as ‘safe’ and ‘non‐medicinal’. In fact, some are known to function as chemopreventive agents against oxidative damage, cerebrovascular disease, and aging. RESULTS: Phenolic compounds, natural antioxidants present in virgin olive oil, play an important role in oil quality by contributing significantly to protecting oil stability against oxidation. In addition, polyphenols are the main contributors to olive oil bitterness, astringency and pungency. The data were fit by linear regression, giving Rancimat stability (h) = 0.18× Total polyphenols (mg L^?1) in the virgin olive oil. CONCLUSIONS: The practice of harvesting ripe olives as soon as possible to produce oils of high phenolic contents and thus high oxidative stability implies bitter and piquant oils, this being admissible for oils of some varieties but detrimental to others appreciated in the market for being more fruity and sweeter. Copyright © 2010 Society of Chemical Industry     

酒精对酪蛋白酸钠溶液及O/W乳状液的影响

介绍了酒精对酪蛋白酸钠溶液及酪蛋白稳定的O/W乳状液性质的影响 .试验表明酒精在一定程度上可以降低酪蛋白酸钠的溶解度 .界面张力的测定则表明酒精的存在在很大程度上可以降低油—水界面和油—酪蛋白溶液界面的界面张力 .含酒精的乳状液体系的粘度会由于酒精的存在而提高 ,在酒精体积分数达 3 0 %时 ,乳状液体系的粘度会突然大幅度升高 .通过O/W乳状液的分层稳定性测定可发现 ,低浓度的酒精可以提高酪蛋白稳定的乳状液的分层稳定性 ,但酒精质体积分数超过 3 2 %时 ,乳状液的分层稳定性会受到破坏 .含酒精的O/W乳状液体系中油相含量的提高在一定范围内可以提高乳状液的稳定性 ,但高分散相浓度的含酒精的乳状液体系中由于连续相中酒精浓度的提高使乳状液体系稳定性下降 .