微胶囊壁材辛烯基琥珀酸酯化淀粉的界面性质和乳化稳定性

本文使用两种辛烯基琥珀酸酯化淀粉HI-CAP100和N-LOK为壁材制备微胶囊化薄荷油并研究了这两种壁材的界面性质和乳化稳定性。研究结果表明，HI-CAP100不仅能有效地降低油，水界面的界面张力，而且能在油，水界面上形成具有良好粘弹性且界面粘度较高的界面膜，由其制备的乳状液具有很高的乳化稳定性。由HI-CAP100为壁材制备的高载量（40％，W/W）的微胶囊化薄荷油产品的微胶囊化产率、效率均超过95％，经30℃贮存6个月，其保留率仍高达95．3％，显示出微胶囊化薄荷油具有良好的贮存稳定性。     

利用辛烯基琥珀酸酯化淀粉进行核桃油微胶囊化的研究

为防止核桃油氧化,以辛烯基琥珀酸酯化淀粉HI-CAP100为壁材,采用喷雾干燥法对核桃油进行微胶囊化研究,以确定最佳生产工艺条件,并对产品进行了电镜观察。实验结果表明,壁材选用0.6∶0.4的辛烯基琥珀酸酯化淀粉HI-CAP100和麦芽糊精,载油量为40%,干物质含量为40%,在35～40MPa压力下均质2～3次,喷雾干燥进风温度190℃,出风温度90℃,获得粉末核桃油包埋效率在99%以上。     

响应面法优化花生四烯酸微胶囊工艺的研究

采用辛烯基琥珀酸酯化淀粉HI-CAP100和麦芽糊精作为复合壁材,以花生四烯酸为芯材,通过喷雾干燥法制备微胶囊化花生四烯酸,以微胶囊化效率为响应值,用响应面分析法(RSA)对花生四烯酸微胶囊化工艺进行了优化,确定最优工艺参数为:固形物含量39%,均质压力37MPa、喷雾干燥进风温度191 ℃,出风温度为88℃.     

甜橙油微胶囊的制备及理化性质研究

以辛烯基琥珀酸酯化淀粉HI-CAP100和麦芽糊精为壁材,采用喷雾干燥法对甜橙油进行微胶囊化研究,通过对HI-CAP100和麦芽糊精比例、固形物浓度、载油量、进风温度等工艺参数进行研究,确定了最佳制备工艺条件,并对产品进行了扫描电镜观察和热分析。实验结果表明,壁材选用2:1的HI-CAP100和麦芽糊精,固性物浓度为35%,载油量为30%,进风温度为200℃时,甜橙油微胶囊包埋效率在99.4%,玻璃化转变温度为118.28℃,微胶囊颗粒近似球形,表面光滑,没有裂纹。     

油莎豆油微胶囊制备工艺优化

实验以乳化液粘度和包埋率为考察指标,通过单因素及正交实验,借助显微拍照、粒径分布分析,优化了油莎豆油微胶囊制备工艺。结果表明:选用辛烯基琥珀酸酯化淀粉HI-CAP100和麦芽糊精复配作为微胶囊化油莎豆油的壁材,油莎豆油微胶囊制备最优工艺为:壁材比(辛烯基琥珀酸酯化淀粉∶麦芽糊精)为1∶1,载油量为20%,干物质含量为40%,在此条件下,油莎豆油的微胶囊包埋率可达到77.62%,平均粒径为46.78μm。贮藏实验结果表明,微胶囊化油莎豆油的贮藏稳定性较好。     

纳米球/微球包埋维生素A和维生素E

研究了一种可分步释放多组分的包埋体系,即包埋VA的疏水性纳米球与VE同时被包埋在对湿度敏感的微球体系中.采用单甘酯为纳米球壁材包埋VA,辛烯基琥珀酸酯化淀粉(HI-CAP100)为外层微球壁材包埋VE.由热均质一喷雾干燥法制备纳米球/微球包埋体系,通过单因素、正交实验确定了包埋VA、VE多组分包埋体系的最佳配方和喷雾干燥工艺条件:两种壁材辛烯基琥珀酸酯化淀粉与单甘酯的质量比为8:1(w/w),芯材v.的栽量为25%(w/w),微球芯材VE和纳米球占微球壁材辛烯基琥珀酸酯化淀粉的百分比为50%(w/w),固形物含量为40%(w/w);喷雾工艺条件为进风温度185℃,出风温度80℃,均质压力40MPa.     

叶黄素微胶囊化研究

以反式叶黄素晶体为芯材,辛烯基琥珀酸酯化淀粉和蔗糖为壁材,通过乳化、均质、喷雾干燥等工艺,制备叶黄素微胶囊。通过单因素试验和正交试验确定叶黄素微胶囊化最优的工艺条件为蔗糖占总壁材质量为10%、壁材质量浓度0.15g/mL、芯壁材质量比1:15、乳化剂添加量为总壁材质量的0.6%、胶体磨均质两次、进料速度400mL/h、进风温度160℃、出风温度80℃,所得产品微胶囊效率和产率分别为92.35%和90.27%,且品质良好。     

粉末甾醇酯制备工艺研究

研究喷雾干燥法制备粉末甾醇酯工艺。研究结果表明,粉末甾醇酯最优乳化条件为:复合乳化剂配比(单甘油酯∶蔗糖酯)为1∶9、乳化剂用量0.75%、壁材用量20%、壁材比(辛烯基琥珀酸酯化淀粉∶麦芽糊精)为1∶5、芯材与壁材比为0.5。喷雾干燥法制备粉末甾醇酯最佳工艺参数为:进料温度50℃~60℃、均质压力50 MPa、进风温度180℃、出风温度80℃、喷雾压力180 KPa;在此工艺条件下,微胶囊化率可达77.8%。     

辛烯基琥珀酸酯化淀粉在微胶囊化桔油中的应用

测定了3种辛烯基琥珀酸酯化淀粉HI CAP100、CAPSUL和N LOK的酯化度,分别为0.104,0.063,0.059;随着酯化度的增大,辛烯基琥珀酸酯化淀粉的粘度降低,乳化能力和乳化稳定性增加.分别以HI CAP100、CAPSUL和N LOK作为壁材制备了微胶囊化桔油,结果表明:以酯化度最大的HI CAP100为壁材的微胶囊化桔油具有最高的效率和保留率,HI CAP100可作为包埋桔油的优选壁材.     

辛烯基琥珀酸淀粉酯包埋肉桂精油微胶囊的研究

以辛烯基琥珀酸淀粉酯为壁材,利用喷雾干燥法制备了肉桂精油微胶囊.探讨了固形物含量、芯壁比、均质时间、均质温度、进风温度、进料速度、出风温度对微胶囊化效果的影响,经过单因素实验,确定了最佳工艺条件.实验结果表明,均质时间180 s,芯壁比1:4,固形物含量30％,均质温度50℃.肉桂精油最佳微胶囊化的最佳喷雾干燥条件为进风温度198℃,出风口温度100℃,进料速度55 mL/min.所获得的肉桂精油微胶囊产品中精油的含量为92.76％.     

Reliable identification of grapevine rootstock varieties using RAPD PCR on woody samples

Since grapevine ( Vitis spp .) rootstock material is being traded increasingly as disbudded woody material a lack of distinctive morphological features on such material necessitates an alternative and reliable means of identification. Methods described here were developed for rapid and efficient extraction of DNA from woody samples rich in phenolic compounds and polysaccharides, and for subsequent identification of varieties by RAPD PCR. Using these methods, and with the application of only one selected RAPD primer, we were able to differentiate sixteen rootstock varieties, including the seven varieties most commonly used in Germany. Problems commonly encountered with reproducibility of RAPD patterns were avoided by choosing primers with a dinucleotide sequence and a high G/C content that allowed a rather high annealing temperature of 45°C. Methods described here should also be useful for other horticultural crops, especially those with woody tissues rich in phenolic compounds and polysaccharides.     

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     

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     

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,