Theses and Dissertations from UMD

Permanent URI for this communityhttp://hdl.handle.net/1903/2

New submissions to the thesis/dissertation collections are added automatically as they are received from the Graduate School. Currently, the Graduate School deposits all theses and dissertations from a given semester after the official graduation date. This means that there may be up to a 4 month delay in the appearance of a give thesis/dissertation in DRUM

More information is available at Theses and Dissertations at University of Maryland Libraries.

Browse

Filters

20061

Settings

Author: search.filters.author.Su, LanSubject: search.filters.subject.Heat stress

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    Item
    Effects of Post-harvest Treatment and Heat Stress on the Antioxidant Properties of Wheat
    (2006-08-03) Su, Lan; Yu, Liangli; Food Science; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    This research examined and compared grain, bran, and micronized bran samples of Ankor and Trego wheat stored at 25, 60 and 100oC for their free radical scavenging properties, total phenolic content (TPC) and phenolic acid compositions. Bran and micronized bran samples stored at 100oC showed decreased TPC and free radical scavenging activities over 9 days of treatment, while there was no significant change observed for grain samples. Because of smaller particle size, micronized bran was more sensitive to heat stress when compared to bran at the two elevated temperatures. In addition, extractable phenolic acids were increased during storage for all kinds of samples on a per dry weight basis. These results demonstrate that whole grain is a preferred form of long-term storage for better antioxidant preservation, and reducing particle size may accelerate the loss of natural antioxidants in wheat bran during storage and heat treatment.