姜黄色素微胶囊化制备工艺的研究

以姜黄色素为芯材,以β-环糊精及其衍生物为壁材,采用超声波水浴法系统研究了姜黄色素微胶囊化工艺条件。试验结果表明:超声波水浴法制备姜黄色素微胶囊的最佳工艺条件为:超声功率200W,包埋温度为60℃,包埋时间80min,芯壁材比为1:20。姜黄色素的包埋率可达90%以上。     

微胶囊化姜黄色素的工艺及性能研究

采用喷雾干燥法对姜黄色素进行微胶囊化,克服了原有姜黄色素在使用中的不便,且增加了姜黄色素的稳定性.结果表明选用明胶、麦芽糊精为壁材的最佳配比为17;原料姜黄素含量2-5%;乳化温度55-60℃,喷雾干燥进风温度180-200℃,排风温度93-98℃,产品水份含量1.5-2.5%.     

微胶囊化姜黄色素的制备与性质研究

本文主要研究了微胶囊化姜黄色素的制备与性质。试验结果表明,微胶囊化姜黄色素的水溶性大大提高,且对热、光、pH、维生素C等的稳定性都有所改善。     

姜黄色素及其微胶囊化的应用研究

采用环糊精、环糊精衍生物及其他壁材(如麦芽糊精等)对姜黄色素进行微胶囊化 ,经微胶囊化后的姜黄色素 ,其水溶性得到大大提高 ,且对热、储存时间的稳定性也有一定改善 ,是一种极有前途的包络技术。     

姜黄色素稳定性的研究

姜黄色素稳定性的研究王贤纯（湖南师范大学生物系）姜黄色素由于其在姜黄中的含量高，着色力强以及具有一定的医疗保健作用而被认为是最有开发价值的天然食用黄色素之一［１］。但是由于姜黄色素在提取、精制和应用过程中，容易受到破坏以及其他一些方面的原因，而使这种...     

姜黄色素稳定性研究

以姜黄为原料,研究了温度、光照、pH常用食品添加剂及金属离子对姜黄色素稳定性的影响。结果表明:温度对姜黄色素的稳定性影响不大,光、pH、食盐浓度及金属离子Fe3+、Ca2+、Cu2+、Fe2+对其稳定性影响较大,柠檬酸、抗坏血酸、山梨酸钾、蔗糖浓度对其影响不大;且该色素有一定的抗氧化性和抗还原性。     

水溶性姜黄色素稳定性的研究

从姜黄中提取的微溶于水的姜黄色素,对浸膏进行增溶后得到水溶性姜黄色素乳状液。试验研究了pH、光照、温度、Fe3+、柠檬酸和维生素C对水溶性姜黄色素稳定性的影响,结果表明pH、光照、Fe3+、柠檬酸对水溶性姜黄色素稳定性的有一定影响;pH不同,色素对温度变化的敏感性不同;维生素C对水溶性姜黄色素稳定性的影响较小。     

姜黄提取姜黄色素的初步研究

本论述了以姜黄为原料提取姜黄色素的工艺，对提取温度、时间、溶剂的浓度等方面进行了讨论，以及姜黄色素对光和热的稳定性方面进行了实验。     

姜黄色素稳定性的研究

本文介绍姜黄色素的提取及性质 ,着重研究食品中常用添加剂对该色素稳定性的影响 ,并对色素的耐氧化性、耐还原性进行探讨。     

天然红花黄色素的微胶囊化研究

采用微胶囊化方法提高天然红花色素的稳定性,以推广天然红花黄色素在食品中的使用。本文首次采用多孔淀粉为吸附剂,使用明胶对天然红花黄色素进行包埋,制备红花黄色素微胶囊,并对其稳定性进行了研究。研究结果表明:其微胶囊化最佳工艺条件为包埋温度70℃,包埋时间2h,芯壁材比1∶40,此时红花黄色素的包埋率高达89.5%。其水溶性有所提高,红花黄色素微胶囊对温度、酸碱、光照、金属离子和氧化还原剂的稳定性较强。      

Study on microencapsulation of curcumin pigments by spray drying

Curcumin has strong coloring power, safety and innocuity, comprehensive pharmacological function, but its low stability and water insoluble limit its application. Curcumin microcapsules were prepared by spray-drying process using porous starch and gelatin as wall material here. Results showed optimal condition as follows: the ratio of core and wall material of 1/30, embedding temperature of 70 °C, embedding time 2 h, inlet gas temperature of 190 °C, feed flow rate 70 mL/min and drying air flow 70 m³/h, at which the microencapsules had good encapsulation efficiency. The stability of microencapsulation curcumin against light, heat, pH was effectively improved and its solubility was increased greatly. This study would be helpful to the industrial application of curcumin.     

Complexation of curcumin with soy protein isolate and its implications on solubility and stability of curcumin

Curcumin, a natural polyphenolic food colourant, suffers a low bioavailability because of its low solubility and instability in aqueous solutions. Our study demonstrates that the food derived soy protein isolate (SPI) can form a complex with the curcumin. Fluorescence spectroscopy of the SPI–curcumin complex revealed that the complex is formed through hydrophobic interactions. Moreover, curcumin molecules quench the intrinsic fluorescence of SPI upon binding. Upon complexation, curcumin showed increased water solubility. Stability studies by UV spectroscopy showed that >80% of the curcumin was stable in the SPI–curcumin complex when dissolved in water, simulated gastric and intestinal fluids for 12 h, which would provide sufficient time for intestinal absorption. SPI–curcumin complex exhibits enhanced antioxidant activity and is capable of forming foam and emulsion, indicating its possible utilisation in food product formulation. This study suggests that SPI, being an edible protein, could be used as a material to encapsulate water-insoluble bioactive compounds in functional foods.     

姜油树脂微胶囊稳定性及动力学特性的研究

以姜粉和姜油树脂为对照、姜辣素保存率为评价指标,通过实验考察了姜油树脂微胶囊（姜油树脂/β-环糊精包合物）在酸、碱、紫外线、高温、高湿影响下的稳定性,并进行了动力学特性（降解速率常数和半衰期）的初步研究。结果显示,pH1和pH11分别处理1d,微胶囊样品中姜辣素保存率分别为94.5%和70.3%。紫外光处理,微胶囊样品中姜辣素降解的速率常数为1.1463,半衰期为44.8d;110℃处理,姜辣素降解速率常数为2.50,半衰期为20.9d;高湿度（相对湿度92.5%）下,姜辣素降解速率常数3.12,半衰期为17.3d。与姜粉和姜油树脂相比,微胶囊对酸、碱、紫外线、高温、高湿等外界因素有着良好的稳定性。      

番茄红素的微胶囊化研究和稳定性实验

研究了喷雾干燥法制备微胶囊番茄红素粉末的工艺及技术,结果表明,在天然番茄红素微胶囊的生产过程中,制造微胶囊型番茄红素的壁材最佳组合为:以阿拉伯胶和糊精以1∶1的质量比混合作为壁材,原料固形物含量为20%,芯材和壁材的适宜比例为1∶6;高压均质可有效地提高天然番茄红素的微胶囊化效率和微胶囊化产率,其最佳均质压力为30MPa;最佳喷雾干燥造粒工艺条件为:进风温度190℃、出风温度65～75℃、进料量为4.0mL/min、进风压力为0.15MPa。     

Studies on curcumin and curcuminoids VIII. Photochemical stability of curcumin

Summary The photodecomposition of curcumin when exposed to UV/visible radiation is studied. The main degradation products are identified. The reaction mechanisms are investigated and the order of the over-all degradation reactions and the half-lives of curcumin in different solvents and in the solid state are determined.

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Studien über Curcumin und Curcuminoide. VIII. Photochemische Stabilität des Curcumins

Zusammenfassung Die photochemische Stabilität von Curcumin wurde untersucht und die Hauptprodukte der Spaltung identifiziert. Die Abbau- und Halbzeit-Reaktionen des Curcumins in verschiedenen Lösungsmitteln und im festen Zustand werden beschrieben.

     

天然色素花青素的微胶囊化研究

研究喷雾干燥法制备高包埋率微胶囊化花青素的壁材组成以及工艺条件,结果表明:花青素∶壁材为20%、麦芽糊精∶β-环状糊精为3∶1、阿拉伯胶比例为10.0%、喷雾干燥的进口温度120℃、出口温度80℃时,花青素的微胶囊化效果最好、包埋率高,而且花青素微胶囊化后,其稳定性有显著提高。     

Studies on curcumin and curcuminoids. VIII. Photochemical stability of curcumin

The photodecomposition of curcumin when exposed to UV/visible radiation is studied. The main degradation products are identified. The reaction mechanisms are investigated and the order of the over-all degradation reactions and the half-lives of curcumin in different solvents and in the solid state are determined.