|
KMID : 1134820100390010132
|
|
Journal of the Korean Society of Food Science and Nutrition
2010 Volume.39 No. 1 p.132 ~ p.137
|
|
|
Preparation and Characterization of Jochung, a Grain Syrup, with Apple
|
|
Yang Hye-Jin
Ryu Gi-Hyung
|
|
|
Abstract
|
|
|
|
This study was performed to investigate the effect of apple and maltitol as ingredients on the quality of Jochung, a grain syrup. Four kinds of Jochung products were prepared from steamed-rice, apple juice, heated-apple sarcocarp (at 70℃, 60 min), and a mixture (sarcocarp : maltitol＝5:1, w/w) by saccharifying (at 55℃, 8 hrs) with a malt (100 g/500 g rice), mixing the ingredients (steamed-rice : ingredient＝5:5, w/w), filtering, and heating the filtrate (at 95℃, 2 hrs): product (A) with apple juice added before saccharified, product (B) with apple juice added after saccharified, product (C) with heated-apple sarcocarp added after saccharified, and product (D) with the mixture added after saccharified. The product (D) had the lowest pH value (4.60±0.01) of any other products. The contents of reducing sugar and total phenolic compound were the highest in the product (A) among all the products, which comprised 68.10±6.71% and 7.36±0.85 ㎎/g, respectively, resulting in good quality. The solidity and the dextrose equivalence had the highest value in the product (B) and the product (C), respectively. The malic acid content (4.10±0.02%) of the product (D) was the highest of any other organic acids identified by HPLC. Hunter L, a, and b values of the product (D) were the highest compared to other products. In sensory evaluation, the product (A) had generally higher score in all sensory attributes. It was concluded from the chemical and sensory evaluation that adding the apple juice before saccharified might be an effective method for manufacturing good quality rice-Jochung.
|
|
|
KEYWORD
|
|
|
apple, Jochung, quality characteristics, Jochung added with apple
|
|
|
FullTexts / Linksout information
|
|
|
|
|
|
Listed journal information
|
|
|
|