Food Engineering Department, CSIR-Central Food Technological Research Institute, Mysore, 570 020, India; Acadamy of Scientific and Innovative Research (AcSIR), New Delhi, 110 001, India.
J Sci Food Agric. 2014 Apr;94(6):1116-23. doi: 10.1002/jsfa.6378. Epub 2013 Oct 2.
(-)-Hydroxycitric acid (HCA) is the major acid present in the fruit rinds of certain species of Garcinia. HCA has been reported to have several health benefits. As HCA is highly hygroscopic in nature and thermally sensitive, it is difficult to incorporate in foodstuffs. Hence, Garcinia cowa fruit extract was microencapsulated using three different wall materials such as whey protein isolate (WPI), maltodextrin (MD) and a combination of whey protein isolate and maltodextrin (WPI + MD) by spray drying. Further, these microencapsulated powders were evaluated for their impact on bread quality and HCA retention.
Maltodextrin (MD) encapsulates had higher free (86%) and net HCA (90%) recovery. Microencapsulates incorporated breads had enhanced qualitative characteristics and higher HCA content than water extract incorporated bread due to efficient encapsulation during bread baking. Comparatively, bread with MD encapsulates showed softer crumb texture, desirable sensory attributes with considerable volume and higher HCA content.
The higher HCA contents of encapsulate incorporated breads were sufficient to claim for functionality of HCA in bread. Comparatively, MD had efficiently encapsulated Garcinia fruit extract during spray drying and bread baking. Spray drying proved to be an excellent encapsulation technique for incorporation into the food system.
(-)-羟基柠檬酸（HCA）是某些藤黄属植物果实果皮中存在的主要酸。据报道，HCA 具有多种健康益处。由于 HCA 具有很强的吸湿性和热敏性，因此很难掺入食品中。因此，采用喷雾干燥法，使用乳清蛋白分离物（WPI）、麦芽糊精（MD）和乳清蛋白分离物和麦芽糊精的混合物（WPI+MD）三种不同的壁材对罗望子果实提取物进行微胶囊化。此外，还评估了这些微囊化粉末对面包质量和 HCA 保留的影响。
麦芽糊精（MD）包埋物具有更高的游离（86%）和净 HCA（90%）回收率。由于在面包烘焙过程中进行了有效的包埋，因此掺入微囊化粉末的面包具有增强的定性特性和更高的 HCA 含量，而掺入水提取物的面包则没有。相比之下，含有 MD 包埋物的面包具有更柔软的面包屑质地、令人满意的感官特性、相当大的体积和更高的 HCA 含量。
掺入包埋物的面包中的 HCA 含量足以声称 HCA 在面包中的功能。相比之下，MD 在喷雾干燥和面包烘焙过程中有效地包埋了罗望子果实提取物。喷雾干燥被证明是一种将其掺入食品系统的极好的包埋技术。
