Rice bran protein has been found to be of high quality and of importance for food and pharmaceutical applications. It is a plant protein that can be derived from rice bran, an abundant and cheap agricultural byproduct. The protein content in rice bran is about 10-15% and it consists of 37% water-soluble, 31% salt-soluble, 2% alcohol-soluble, and 27% alkali-soluble storage proteins. Its unique property as being hypoallergenic and having anti-cancer activity makes it a superior cereal protein that may find a wide range of applications. There were already reports on the extraction of rice bran protein several decades ago. However, as of now, commercial rice bran protein is still unavailable in the market. This review is aimed at providing valuable discussions on rice bran protein, that is, storage protein, its various properties, and extraction methods for the development of an effective processing scheme. Also, an update on the current processing methods is also included.
Depending on the source, deodorizer distillates usually have significantly different characteristics, uses, and value. Soybean oil deodorizer distillate (SODD) has been suggested as an alternative to marine animals as a natural source of squalene and a good raw material for the production of fatty acid steryl esters (FASEs), tocopherols, free phytosterols and fatty acids. The purpose of this work was to isolate and purify natural FASEs from SODD by a suitable method without degradation of the FASEs. Modified Soxhlet extraction, modified silica gel column chromatography, and binary solvent extraction were employed sequentially in this study to obtain FASEs from SODD. FASEs with a purity of 86.74% and a total recovery of 85.32% could be obtained in the final product.
BACKGROUND: Oil production from rice bran, an undervalued by-product of rice milling, produces defatted rice bran (DRB) as a waste material. Although it is considered a less valuable product, DRB still contains useful substances such as phenolic compounds with antioxidant, UV-B-protecting and anti-tumour activities. In this study the phenolic acids in DRB were extracted with subcritical water at temperatures of 125, 150, 175 and 200• C.
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