Campus Units

Food Science and Human Nutrition

Document Type

Article

Publication Version

Published Version

Publication Date

2007

Journal or Book Title

American Journal of Food Technology

Volume

2

First Page

248

Last Page

256

DOI

10.3923/ajft.2007.248.256

Abstract

Starch structures and physicochemical properties of C-trim30, a β-glucan-enriched oat product (32% β-glucan), with or without supercritical carbon dioxide extraction (SCD) were studied to evaluate suitability for commercial applications and potential to degrade starch to increase β-glucan concentration. Scanning electron micrographs showed C-trim30 was composed of 200-300 μm long, porous particles. HPSEC equipped with MALLS and RI detectors showed C-trim30 had three peaks, corresponding to amylopectin with weight-average molecular weight (Mw) of 1.0x108, breakdown amylopectin product (Mw 1.1x107) and amylose (Mw 1.7x106). β-glucans were not observed due to HPSEC column absorption. C-trim30 amylopectin Mw and gyration radii increased after SCD suggesting aggregation of molecules occurred. No thermal transitions were observed for C-trim30 heated 0-150°C. C-trim30 pasting properties, measured using Rapid ViscoAnalyser, showed high peak viscosity (291 RVU) at 30°C, high breakdown (200 RVU), final (273 RVU) and setback (183 RVU) viscosity after heated to 95°C while stirred. SCD increased peak (423 RVU) and breakdown (318 RVU) viscosity. C-trim30 heated from 15 to 110°C showed higher water-holding capacity occurred without SCD. SCD oil fatty acid composition of 82% unsaturated was apposite for health-food applications. Study suggests C-trim30 with and without SCD could function as fat substitutes.

Comments

This article is published as David G. Stevenson, Fred J. Eller, Jay-lin Jane and George E. Inglett, 2007. Starch Structures and Physicochemical Properties of a Novel β-glucan enriched Oat Hydrocolloid Product with and without Supercritical Carbon Dioxide Extraction*. American Journal of Food Technology, 2: 248-256. DOI; 10.3923/ajft.2007.248.256

Rights

Works produced by employees of the U.S. Government as part of their official duties are not copyrighted within the U.S. The content of this document is not copyrighted.

Copyright Owner

Academic Journals, Inc.

Language

en

File Format

application/pdf

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