不同包埋剂组合对 Shirota 在储存、模拟胃肠道条件和乳制品甜点中的生存能力的影响。
Effect of different encapsulating agent combinations on viability of Shirota during storage, in simulated gastrointestinal conditions and dairy dessert.
机构信息
1 Program of Food Technology, Yeşilyurt Demir-Çelik Vocational School, Ondokuz Mayis University, Samsun, Turkey.
2 Food Engineering Department, Engineering Faculty, Bolu Abant Izzet Baysal University, Bolu, Turkey.
出版信息
Food Sci Technol Int. 2019 Oct;25(7):608-617. doi: 10.1177/1082013219853462. Epub 2019 May 30.
In this study, the effects of various matrices consisting of maltodextrin and reconstitute skim milk and their binary and ternary mixtures with gum Arabic in the microencapsulation of Shirota by freeze-drying technique were assessed. Microcapsules produced with reconstitute skim milk showed high viability (>99%) after freeze drying. While the free cells were completely inactivated after exposure to simulated gastrointestinal conditions, the survival rates of microencapsulated Shirota were found high for all microcapsules except for maltodextrin and maltodextrin:gum Arabic formulas. The viability of microencapsulated Shirota during storage at refrigerate and room temperatures decreased between 0.39 and 2.43 log cycles and microcapsules produced with reconstitute skim milk:gum Arabic was found more durable at the both storage conditions. Reduction in the number of free cells was higher than encapsulated Shirota numbers during production of dessert, however the viability of encapsulated Shirota was found stable for 14 days of storage and consequently desserts containing encapsulated Shirota (except maltodextrin) showed stable pH values. This study revealed that combination of reconstitute skim milk:gum Arabic was an effective wall matrix for microencapsulation of Shirota by freeze drying and also very resistant against gastrointestinal fluids and storage conditions in view of protection of Shirota.
在这项研究中,评估了由麦芽糊精和再制脱脂乳以及它们与阿拉伯胶的二元和三元混合物组成的各种基质在冷冻干燥技术下对 Shirota 微胶囊化的影响。再制脱脂乳生产的微胶囊在冷冻干燥后具有高存活率(>99%)。虽然游离细胞在暴露于模拟胃肠道条件后完全失活,但除了麦芽糊精和麦芽糊精:阿拉伯胶配方外,所有微胶囊化的 Shirota 的存活率都很高。在冷藏和室温下储存期间,微囊化 Shirota 的存活率下降了 0.39 到 2.43 个对数循环,并且在这两种储存条件下,由再制脱脂乳:阿拉伯胶制成的微胶囊被发现更耐用。在生产甜点时,游离细胞数量的减少高于包封的 Shirota 数量,但是包封的 Shirota 的存活率在 14 天的储存期间保持稳定,因此含有包封的 Shirota(除了麦芽糊精)的甜点显示出稳定的 pH 值。这项研究表明,再制脱脂乳:阿拉伯胶的组合是通过冷冻干燥对 Shirota 进行微胶囊化的有效壁基质,并且鉴于对 Shirota 的保护,它也非常耐胃肠液和储存条件。