UMD Theses and Dissertations

Permanent URI for this collectionhttp://hdl.handle.net/1903/3

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 given thesis/dissertation in DRUM.

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

Browse

Filters

20171

Settings

Author: search.filters.author.Ding, QiaoSubject: search.filters.subject.Benzoic Acid

Search Results

Now showing 1 - 1 of 1
  • Thumbnail Image
    Item
    The Antimicrobial Effect of Benzoic Acid or Propyl Paraben Treatment combined with UV-A Light on Escherichia Coli O157:H7
    (2017) Ding, Qiao; Tikekar, Rohan V; Food Science; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)
    The antimicrobial effect of the combined UV-A light and benzoic acid (BA) or propyl paraben (PP) treatment was evaluated using Escherichia Coli O157:H7. Factors affecting the efficacy of antimicrobial treatments were examined through various microbial and biochemical approaches. A combined 15 mM BA and UV-A treatment exhibited more than 5 log (CFU/mL) reduction in antimicrobial activity via production of reactive oxygen species (ROS), membrane damage and decreasing intracellular pH. Similarly, the combined 3 mM PP and UV-A treatment also caused more than 5 log reduction contributed by membrane damage. UV-A and BA treatment was also found to be effective in a scaled-up, continuous system, while a combined UV-A and PP was able to significantly reduce the likelihood of cross-contamination in simulated fresh produce washing study. The findings from this study have revealed the potential for the combined treatments that help to improve the safety and quality of fresh produce.