Osmotic dehydration of yacon (Smallanthus sonchifolius): Optimization for fructan retention

被引：23

作者：

de Oliveira, Leticia Fernandes ^{[1
]}

Gomes Correa, Jefferson Luiz ^{[2
]}

de Angelis Pereira, Michel Cardoso ^{[2
]}

Souza Ramos, Alcineia de Lemos ^{[2
]}

Vilela, Marina Barbosa ^{[2
]}

机构：

[1] Fed Univ Sao Joao del Rey, CCO, BR-35501296 Divinopolis, MG, Brazil

[2] Univ Fed Lavras, BR-3720000 Lavras, MG, Brazil

来源：

LWT-FOOD SCIENCE AND TECHNOLOGY | 2016年 / 71卷

关键词：

Pulsed vacuum osmotic dehydration; Prebiotic; FOS; MASS-TRANSFER; HEAT-PUMP; KINETICS; COLOR; TOMATOES; SORBITOL; FRUIT; JUICE;

D O I：

10.1016/j.lwt.2016.03.028

中图分类号：

TS2 [食品工业];

学科分类号：

0832 ;

摘要：

Yacon presents prebiotic and hypoglycemic properties with a high fructan content. Pulsed vacuum osmotic dehydration (PVOD) is a process that can reduce water activity with small variations in nutritional properties. Yacon slices were dehydrated with two different solutions: fructose and sorbitol. The experiments were based on a central composite rotational design and the optimum condition set for the highest retention of fructans. The PVOD experiments were performed in 300 min, with vacuum pulse in the first 10 min. The independent variables were temperature (24-44 degrees C), vacuum pressure (49.4 - 200.6 mmHg) and osmotic solution concentration (22.0-60.8 degrees Brix). The dependent variables were fructan retention, weight reduction, water loss, solid gain, water activity and total color difference. The highest fructan retention was obtained with sorbitol, ranging from 28.13 to 82.03%, in contrast to the range of 2.79-39.48% obtained for the sample dehydrated with fructose. The optimum PVOD condition with sorbitol was concentration of 38 degrees Brix, temperature of 35 degrees C and vacuum pressure of 74 mmHg. For PVOD with fructose, the best results were obtained with a solution concentration of 35 degrees Brix, temperature between 24 and 30 degrees C and vacuum pulse above 100 mmHg. (C) 2016 Elsevier Ltd. All rights reserved.

引用

页码：77 / 87

页数：11

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