Yuqing He

Document Type

Thesis - University Access Only

Award Date


Degree Name

Master of Science (MS)

Department / School

Home Economics

First Advisor

Padmanaban G. Krishnan


Corn distillers' grain, a by-product of the ethanol industry, is known to be an excellent source of dietary protein and dietary fiber. The protein solubility profile of corn distillers' grain at the pH range of 2 to 12 was determined. Optimal protein extraction and characterization of functional properties of extracts from distillers' grain was done. The maximum protein solubility was 26% at pH 12 and minimum protein solubility was 2% at pH 3.5. Of 12 combination of parameters tested, the highest protein extraction (53%) was achieved by using 0.3 M NaOH solution as the extraction solvent, 20,000 rpm as the homogenizing speed, 80°C as the extracting temperatures, and pH 4 as the protein recovering pH. The functional properties of protein concentrates were comparable with those of commercial soy protein concentrate, soy protein isolates and soy flour.

Library of Congress Subject Headings

Proteins -- Analysis
Extraction (Chemistry)




South Dakota State University



Rights Statement

In Copyright