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United States Department of Agriculture

Agricultural Research Service

Related Topics

Research Project: DEVELOPING NOVEL PROCESSES FOR INCORPORATING THE UNIQUE NUTRITIONAL AMD FUNCTIONAL PROPERTIES OF RICE INTO VALUE-ADDED PRODUCTS

Location: Food Processing and Sensory Quality Research

2009 Annual Report


1a.Objectives (from AD-416)
Through basic and applied research, new technologies for converting rice bran, hulls, endosperm components, in situ and isolated, into high value, high demand products that incorporate their unique nutritional and functional properties will be developed targeting the following objectives:.
1)develop technologies for health-beneficial products from rice bran and hulls; and.
2)develop technologies for rice-sweet potato products.


1b.Approach (from AD-416)
Physical and chemical methodologies will be employed for converting rice bran, rice hulls and their components into value-added products. Anticipated new processes and value-added products are:.
1)efficient, environmentally-friendly processes for extraction of protein from full-fat and defatted rice bran for infant formulations, nutritional supplements, and food ingredients;.
2)rice wax, bran, and hull fractions with desirable functional and health-beneficial properties (e.g., cholesterol-lowering, anti-oxidative); and.
3)gluten-free rice and rice -sweet potato products with enhanced nutritional (e.g., vitamin- and antioxidant-rich, cholesterol-lowering) and unique functional (e.g., low oil-uptake) properties.


3.Progress Report
ECONOMICAL, ENVIRONMENTALLY-FRIENDLY PROCESS FOR RICE STARCH. The patented and licensed process uses high pressure supplied by a microfluidizer (homogenizer) to separate the starch from the protein. This technology has the potential of reducing imports of rice starch and increasing profits for the U.S. rice industry.

QUICK-COOKING BROWN RICE. The patented dry instantization process reduces the cooking time of brown and wild rice from 45-50 minutes to that of white rice (20 min.). The process reduces the cost of processing to make instant rice, reduces environmental pollution, and makes nutritious brown rice more appealing to the consumer.

RICE-SWEET POTATO PANCAKES. The textural and nutritional properties of the rice-sweet potato pancakes were comparable to wheat pancakes, except they had substantially higher contents of the nutrient beta-carotene. This development promotes the use of rice and sweet potato, and creates healthy food products that meet the needs of people who are sensitive to gluten.

MODIFIED RICE STARCH. Rice starches were modified by annealing (heating and slowly cooling), which improved the cooking properties of the starch by causing the starch to gel over a more narrow temperature range. Such a modification will be useful for the food industry.

EDIBLE RICE WAX FILMS. Edible films were prepared using rice wax and pullulan (a good film making polysaccharide) as the main ingredients. The developed rice wax-based films have desirable water vapor permeability and will be useful as carriers of flavor and nutritional additives or as barriers for separation, protection and preservation purposes.

LOW-OIL UPTAKE RICE BATTER. Research was extended to examine solvent effects (such as beer instead of water) on the oil-uptake and sensory properties of the batters when applied to “wet” (fish) and “dry” (onions) food surfaces.

U.S. RICE CULTIVARS WITH HEALTHIER STARCH. Research completed in which U.S. rice cultivars were identified that are inherently high in health-promoting starch fractions (slowly digestible and resistant starch).


4.Accomplishments
1. RICE CULTIVARS WITH HEALTH-PROMOTING STARCH. Dietary starches can be classified into three major fractions according to digestibility: rapidly digestible (RDS), slowly digestible (SDS), and resistant starch (RS). SDS and RS have significant implications on human health, particularly glucose metabolism, diabetes management, colon cancer prevention, mental performance, and satiety. This work determined the nutritionally-important starch fractions in cooked rice grains (as eaten) from 16 cultivars grown in five rice growing areas in the United States. Cultivars high in SDS and/or RS are of particular interest. SDS ranged from 10.3 to 26.6% in the cultivars; RS ranged from 1.2 to 9.0%. Two cultivars (Dixiebelle and Tesanai-2) were relatively high in both RS and SDS. The results could be of value in the selection and breeding of specialty rice for health and wellness and provide baseline information to meet emerging interests among consumers and food processors.


6.Technology Transfer

Number of Invention Disclosures Submitted1
Number of Other Technology Transfer2

Review Publications
Ghufran Saeed, S., Arif, S., Ahmed, M., Ali, R., Shih, F.F. 2009. Impact of the substitution of rice bran on rheological properties of dough and in the new product development. Journal of Food Science and Technology. 46-47.

Last Modified: 7/22/2014
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