芝麻香油粉末油脂的制备工艺研究

优化芝麻香油粉末油脂的制备工艺。以大豆分离蛋白和辛烯基琥珀酸淀粉钠为复合壁材,芝麻香油为芯材,蔗糖脂肪酸酯和单硬脂酸甘油酯复配作为乳化剂,采用真空冷冻干燥的方法制备芝麻香油粉末油脂。最佳的包埋工艺:大豆分离蛋白与辛烯基琥珀酸淀粉钠质量比为5︰1,壁材与芯材质量比为5︰1,乳化剂含量占2%,固形物含量为35%,此时包埋率为88.2%,表面含油率为7.3%。新型的芝麻香油粉末油脂,克服了芝麻香油易腐败氧化、营养损失等缺点,提高了芝麻油的利用价值。     

粉末化榛仁油乳化工艺研究

以大豆分离蛋白(SPI)、麦芽糊精和黄原胶为壁材,以蒸馏单甘酯和蔗糖脂肪酸酯为复合乳化剂制备微胶囊化榛仁油粉末油脂,对榛仁油微胶囊化的乳化工艺进行研究.结果表明,较佳的乳化工艺为:壁材比(大豆分离蛋白:麦芽糊精:黄原胶)10:3:1、芯材/壁材1:2、复合乳化剂含量0.4%(单甘酯/蔗糖酯4:6),乳化温度75℃.     

壁材对微胶囊物化性质的影响

以阿拉伯胶、大豆分离蛋白、明胶、变性淀粉、羧甲基纤维素作为壁材,以喷雾干燥法制备微胶囊。研究结果表明:变性淀粉、大豆分离蛋白和明胶的产率和效率相对较高。变性淀粉所制备的微胶囊表面光滑;阿拉伯胶大豆分离蛋白和明胶所制备的微胶囊的表面都出现明显的凹陷;羧甲基纤维素所制备的微胶囊的表面呈现褶皱。变性淀粉微胶囊,阿拉伯胶微胶囊,大豆分离蛋白微胶囊,明胶微胶囊,羧甲基纤维素微胶囊的体积平均粒径D(4,3)分别为38.31、37.78、35.00、30.68、21.80μm,且粒径越小,容重越低,壁材是影响微胶囊的物化性质的主要因素。     

红瓜子油微胶囊化的乳化工艺研究

以大豆分离蛋白和麦芽糊精作为复合壁材,单甘酯和蔗糖酯作为复合乳化剂,研究红瓜子油微胶囊化的乳化工艺。结果表明,微胶囊化红瓜子油的最佳乳化条件为:剪切乳化时间5 min、壁材比(大豆分离蛋白与麦芽糊精)1︰3、芯壁比3︰5、复合乳化剂用量0.5%(单甘酯与蔗糖酯质量比4︰6)、乳化温度70℃。在此工艺条件下乳化稳定性为96.5%。     

微胶囊化玉米胚芽油粉的研制

以玉米胚芽油为芯材,CMC和大豆分离蛋白为壁材,单甘酯与蔗糖酯为乳化剂,对喷雾干燥法制备玉米胚芽油微胶囊的工艺条件进行研究.确定制备玉米胚芽油微胶囊的最佳工艺条件为乳化剂(单甘酯:蔗糖酯=1:4)添加量为2%,CMC与大豆分离蛋白之间的比例为1:5,复合壁材添加量为22%,芯材添加量为18%,乳化温度为80℃、乳化时间...     

小分子乳化剂对鸡油脂微胶囊化的影响

研究了非离子型小分子乳化剂卵磷脂、单甘酯和蔗糖酯对以大豆蛋白为主要壁材包埋鸡油脂效果的影响。结果表明3种乳化剂均能降低大豆分离蛋白溶液的表面张力，但是卵磷脂、单甘酯对大豆分离蛋白乳状液的稳定性影响不大，而蔗糖酯可以提高大豆分离蛋白乳状液的稳定性，但是三者的存在均使产品的表面油含量增大，微胶囊效率降低。扫描电子显微镜照片显示使用单甘酯和蔗糖酯的微胶囊产品颗粒表面出现孔隙。而使用卵磷脂的微胶囊产品无此现象。结果说明乳状液油水界面膜的强度是影响微胶囊产品包埋效率的重要因素。     

薏苡仁油微胶囊壁材的选择及工艺优化

选用β-环糊精、变性淀粉HI-CAP100两种碳水化合物和大豆分离蛋白、明胶两种蛋白质类壁材进行组合初步筛选薏苡仁油微胶囊的壁材,再利用单因素试验研究了壁材的配比、芯壁比、乳化液壁材含量、乳化剂添加量对微胶囊包埋率的影响,最后通过L_9(3~4)正交试验确定了壁材的最佳配比。结果表明:大豆分离蛋白/变性淀粉HI-CAP100壁材组合在选用的6组壁材组合中综合表现出了良好的潜质,通过工艺优化得到了微胶囊的最佳配方:大豆分离蛋白占壁材质量分数为5%,芯壁比为60%,壁材含量为30%,乳化剂添加量为1.0%,由此得到的薏苡仁油微胶囊的包埋率为78.52%。     

粉末化猪油工艺的研究

猪油与油溶性乳化剂、水溶性乳化剂及壁材等在一定条件下混合均匀、乳化、均质,经喷雾干燥得粉末化猪油.单因素试验表明,最佳乳化条件为:壁材为大豆分离蛋白、β-环状糊精和可溶性淀粉复合使用,亲油乳化剂为单甘酯,亲水乳化剂为Tween 60,HLB值为6～8,乳化剂用量2%～3%,稳定剂明胶用量1.6%～2.0%,加水量10～15倍于基料,乳化温度70℃,乳化时间20min.在其他条件不变的情况下,通过正交试验研究了乳化剂用量、HLB值、明胶用量和壁材对粉末化猪油的溶解度、产品结块状态的影响.研究结果表明,制备40%含油量的粉末化猪油的最佳配方为:乳化剂用量3%,HLB值6,明胶用量2.3%,大豆分离蛋白、β-环状糊精和可溶性淀粉复合作壁材.     

微胶囊技术制备粉末荆芥精油的研究

以荆芥油为芯材,以大豆分离蛋白为壁材,利用乳化和喷雾干燥相结合的方法制备粉末荆芥油.确定的最佳制备工艺条件为:采用单甘酯加吐温-60(HLB=8.0)为乳化剂,添加量为1.5%,乳化温度80℃,明胶添加量2%,荆芥油与壁材大豆分离蛋白的比例为0.5:1,乳状液总固形物浓度为30%.喷雾干燥进风温度210℃,出风温度85℃.该条件下制备的荆芥油粉末微胶囊化效率迭88.1%,表明该法是一种适宜的粉末荆芥油制备方法.     

婴儿配方奶粉用营养油微胶囊化的配方优化

以脂肪酸配比合理的混合植物油为芯材,大豆分离蛋白(SPI)和麦芽糊精(MD)为复合壁材,大豆卵磷脂为乳化剂,采用喷雾干燥工艺制备微胶囊化营养油。利用中心组合设计(CCD)对微胶囊营养油的配方进行优化,得到营养油微胶囊的最佳配方为:芯材质量分数为27.28%,固形物质量分数为39.74%,大豆分离蛋白质量分数为40.00%,卵磷脂质量分数为1.47%。在此条件下,得到MEE和MEY的理论最大值分别为91.188%和96.1129%,期望度为0.894。     

Review of techniques to manufacture micro-hydrogel particles for the food industry and their applications

Microgels are ‘soft’ microscopic cross-linked polymeric particles that are being increasingly exploited in a variety of industries for rheology control, encapsulation and targeted delivery. They are valued because of the ability to tune their functionality to address specific applications in oil recovery, coatings, drug delivery, cosmetics, personal care and foods. Food microgels are typically biopolymer hydrogels in the form of microspheres, nanospheres (also called nanogels), spheroids and fibres. The utilisation of engineered microgels in foods has so far been limited, despite their great potential to address several needs in the food industry, including: satiety control, encapsulation of phytonutrients and prebiotics, texture control for healthier food formulations (e.g. reduced fat products), and targeting delivery to specific areas in the digestive tract. We review the scientific and patent literature on the utilisation and manufacturing methods for producing microgels with an emphasis on micro-hydrogels for food applications.     

12—A CRITIQUE OF SOME HYPOTHESES RELATING TO THE HETEROGENEITY OF THE HIGH-SULPHUR PROTEINS OF WOOL

Joubert and Burns prepared a large number of fractions from the high-sulphur proteins of wool and estimated their molecular weights and amino-acid compositions. Their data have been re-examined in order to look for statistically significant interrelations between amino acids and between the proportion of various amino acids and molecular weight. Statistical analysis of the data is also used to examine the credibility of some hypotheses concerning the mechanism of keratin biosynthesis and to provide further evidence for the existence of families of proteins within the high-sulphur fractions of wool.     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of     

The Latest Data about Development of Chinese Printing Industry in 2013

In the 2014 China（Shanghai）International Printing Week,Director Wang Yanbin released the latest data about development of Chinese printing industry in 2013.According to statistics,in 2013,the total output value of Chinese printing industry exceeded 1trillion Yuan for the first time,reaching 1.03985 trillion Yuan.There were 105,000 printing enterprises in China,employees were 3.415 million.The total asset was 1.06247 trillion Yuan;     

The State Council Issued "Directory of Government Approved Investment Projects(2013 Edition)"

正On December 2nd,2013,the State Council issued the notification of"Directory of Government Approved Investment Projects(2013 Edition)"(hereafter referred to as"notification").It is pointed out in the"notification"that in order to further deepen reforms in investment systems and administrative examination and approval systems,simplify administrative procedures and delegate powers to lower levels,earnestly     

China textile machinery: taking off in progress

正Among the 1600 exhibitors who take apart in the ITMA ASIA+CITME2014 2/3 are Chinese manufactures.If the numerous figures failed to attract your attention,the increase of quality should draw your focus.To adopt the demand of developing textile machine market,domestic textile machinery enterprises now follow the slogan of"technology drives development"to enhance product competitiveness.Our domestic sellers will showcase product ranging from spinning,weaving,dyeing and printing,     

Top Ten News of China's Paper Industry 2013

On December 24th, 2013, the meeting on the selection of top 10 news of China＇s paper industry 2013 sponsored by 〈China Paper Newsletters〉 was held in Beijing. The yearly selection of the top l0 news, which began in 2000, has become a brand activity widely recognized in the industry thanks to the support from the authorities at all levels and public participation.     

National Development and Reform Commission Issued Announcement for Selection of Major Preliminary Research Projects for the "13~(th) Five-Year Plan"

In Apri Commi major p Plan＂ （h 2014, the National Development and Reform ssion issued an announcement for selection of reliminary research projects for the ＂13th Five-Year ereafter referred to as ＂The Announcement＂）     

Announcing a new international peer-reviewed journal:Food Science and Human Wellness now accepting manuscript submission in English

<正>We are pleased to announce the launch of a new international peer-reviewed journal-Food Science and Human Wellness,ISSN 2213-4530,which is an open access journal,produced and hosted by Elsevier B.V.on behalf of Beijing Academy of Food Sciences.Food Science and Human Wellness is an international peer-reviewed English journal that provides a forum for the dissemination of the latest scientific     

Contamination of animal feed and food from animal origin with mineral oil hydrocarbons

Oils and fats used for the production of animal feed can become contaminated with mineral oil material originating from gas oils (C₁₈-C₃₅) or synthetic oils (poly alpha olefins, C₂₅ to beyond C₄₅). An important cause is assumed to be the discharge of waste oils, such as motor oil and hydraulic oils. Mineral oil material was analysed by on-line LC-GC-FID directly in the fat or in a raw extract from animal feed or foodstuffs. In Switzerland in summer/autumn 1999 concentrations in oils and fats for feed production were often found to be between 100 and 1000mg/kg. In the feeds, the average concentration was around 100mg/kg with values ranging up to a maximum of 1000mg/kg; few samples were free of contamination. In animal body fat, the average concentration determined in summer 1999 was 25mg/kg, with a maximum of 150mg/kg, although in samples from December 1999, contamination was substantially lower. In the fat phase of eggs, the average concentration was 30mg/kg, with a maximum of 80mg/kg. Paraffin oil is used for feed production, which may account for part of the contamination problem (e.g. eggs).