精选水果(苹果、苦橙和葡萄)浓缩汁作为渗透剂对石榴种子渗透脱水动力学和理化性质的影响

H. Sebii, M. Bouaziz, Khadija Sghaier, S. Danthine, C. Blecker, S. Besbes, H. Attia, Brahim Bchir
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引用次数: 1

摘要

本研究旨在研究石榴籽(PSs) (Punica granatum L.)的渗透脱水动力学,采用三种水果(苹果、苦橙和葡萄)浓缩汁作为渗透溶液(OSs)(比例为(1/4)m/v, 55°白利度,50°C)。在渗透脱水过程中测定了石榴籽的渗透脱水时间、水分损失、溶质增加和失重情况。蔗糖溶液的渗透脱水平衡时间分别为20、60、80和60 min,苦橙汁浓缩液、苹果汁浓缩液和葡萄汁浓缩液的渗透脱水平衡时间分别为20、60、80和60 min。ps的理化性质、生物学性质和织构性质均受OS变化的显著影响。在渗透脱水结束时,所有果基OS的干物质和白利度值均高于蔗糖OS。与蔗糖OS相比,苹果OS和葡萄OS的ps颜色变深,苦味橙OS的ps颜色变亮。另一方面,所有渗透脱水的ps都显示出重要的抗氧化活性,在葡萄汁OS中渗透脱水的种子达到49.25 meq GA/100 g DM的IC50。所有观察到的变化都归因于不同OS基质组成的差异。此外,享乐分析表明,消费者更喜欢用苦橙汁作为OS获得的渗透脱水ps。
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The Effect of Selected Fruit (Apple, Bitter Orange and Grape) Juice Concentrates Used as Osmotic Agents on the Osmotic-Dehydration Kinetics and Physico-Chemical Properties of Pomegranate Seeds
This work aimed to study the osmotic-dehydration kinetics of pomegranate seeds (PSs) (Punica granatum L.) using three fruit (apple, bitter orange and grape) juice concentrates as osmotic solutions (OSs) (ratio (1/4) m/v, 55° Brix, at 50 °C). The osmodehydration time, pomegranate-seed water loss, solute gain and weight reduction were determined during the osmodehydration process. The equilibrium time periods of osmodehydration were 20, 60, 80 and 60 min for sucrose solution, and bitter-orange, apple and grape juice concentrates, respectively. The physico-chemical, biological and textural properties of PSs were significantly affected by the changes in OS. At the end of osmodehydration, the dry-matter and the Brix values were higher in all fruit-based OSs compared with sucrose OS. The color of PSs became darker in apple and grape OSs and brighter in bitter-orange OS compared with sucrose OS. On the other hand, all osmodehydrated PSs showed important antioxidant activity, with seeds osmodehydrated in grape-juice OS attaining an IC50 of 49.25 meq GA/100 g DM. All observed changes were attributed to the difference in the composition of the different OS matrices. Moreover, the hedonic analysis showed that consumers preferred osmodehydrated PSs obtained using bitter-orange juice as OS.
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