삼투탈수 알로에 건조제품의 구조적 및 물리화학적 특성

김성아¹, 백진홍¹, 이신영²^,^*

Structural and Physicochemical Properties of Dried Aloe Vera Gel Using DIS (Dewatering & Impregnation Soaking) Process

Sung-A Kim¹, Jin-Hong Baek¹, Shin-Young Lee²^,^*

¹(주)김정문 알로에 과학연구소

²강원대학교 생물공학과

¹KJM Aloe R&D Center

²Department of Bioengineering and Technology, Kangwon National University

^*Corresponding author: Shin-Young Lee, Department of Bioengineering and Technology, Kangwon National University, Chunchon 200-701, Korea, Tel: +82-33-250-6273; Fax: +82-33-243-6350, E-mail: sylee@kangwon.ac.kr

ⓒ Copyright 2009 Korean Society for Food Engineering. This is an Open-Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/) which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

Received: Nov 01, 2008; Revised: Dec 06, 2008; Accepted: Dec 21, 2008

Published Online: Feb 28, 2009

Abatract

The structural and physicochemical properties of dried aloe vera gel by DIS (dewatering impregnation soaking) process under optimum conditions were investigated. FT-IR spectra for dried samples of DIS aloes showed the typical patterns of standard aloe polysaccharide, and surface structures by SEM (scanning electron microscopy) were similar to a gel-like structure. In case of physicochemical properties of dried aloe samples by DIS process, solubilities and swelling powers of control (not osmotic treated aloe), DIS (S) and DIS (G), samples treated by osmotic solution of 60% sucrose/0.25% NaCl and 50% glucose/0.5% NaCl, were 48.3-57.3% and 8.3-11.7%, respectively, showing no significant differences among samples, but swelling power of DIS (PEG), sample treated by using 50% polyethylene glycol as an osmotic agent was about 5 times higher that of control. Also, water holding capacities of control, DIS (S) and DIS (G) were similar to each other, but that of DIS (PEG) was about 5 times higher that of control. Oil holding capacities of control and DIS aloes maintained the 50.9-86.4% levels of water holding capacities showing no significant differences among samples. Rehydration ratio of DIS (PEG) aloes were significantly dependent on the temperature of rehydrated solvent (water), and rehydration ratio of not-fileted aloe was about two folds higher than that of fileted aloe.

Keywords: dewatering impregnaticn scaking; Aloe vera gel; rehydration; structural/physicochemical property; Fourier transform infrared spectroscopy; scanning electron microscopy