Advanced search options

Advanced Search Options 🞨

Browse by author name (“Author name starts with…”).

Find ETDs with:

in
/  
in
/  
in
/  
in

Written in Published in Earliest date Latest date

Sorted by

Results per page:

You searched for subject:(peanut skin extract). One record found.

Search Limiters

Last 2 Years | English Only

No search limiters apply to these results.

▼ Search Limiters

1. Levy, Jason M. Evaluation of Peanut Skin Extract, Grape Seed Extract, and Grape Seed Extract Fractions to Reduce Populations of Select Foodborne Pathogens.

Degree: MSin Life Sciences, Food Science and Technology, 2014, Virginia Tech

Grape seed extract (GSE) and peanut skin extract (PSE) are waste products in the wine and peanut industries. Both extracts have high concentrations of polyphenols, known to possess antioxidant and antimicrobial properties. A subcategory of polyphenol is procyanidin, which can be divided into two types, type A and type B. Type A (PSE), contains two single bonds connecting the phenolic groups while type B (GSE), contains one single bond connecting the phenolic groups. The minimum inhibitory concentration (MIC) of the two extracts was evaluated for their antimicrobial effect on Listeria monocytogenes, Staphylococcus aureus, Escherichia coli O157:H7, and Salmonella Typhimurium using the pour plate method. GSE was found to have a significantly lower MIC (p ≤ 0.05) than PSE for L. monocytogenes (GSE=60.60ppm, PSE=not found), S. aureus (GSE=38.63ppm, PSE=51.36ppm), and S. Typhimurium (GSE=45.73ppm, PSE=60.60ppm). There was no significant difference in inhibition of E. coli O157:H7 (GSE=47.44ppm, PSE=51.13ppm). Since GSE, contributed to greater pathogen inhibition, its extract was fractionated into monomer and oligomers components. Growth curves of all four pathogens inoculated in the monomer and oligomer fractions were compared using the BioScreen method. Oligomers inhibited growth of L. monocytogenes, S. aureus, and E. coli O157:H7 while monomers inhibited growth of S. Typhimurium. These results indicate that an extract with type B procyanidins that are high in oligomers may be more effective as antimicrobials. Type B procyanidins have also been shown to prevent bacterial adhesion, as is the case with urinary tract infections, and may aid in the prevention of biofilms. Advisors/Committee Members: Boyer, Renee Raiden (committeechair), O'Keefe, Sean F. (committee member), Neilson, Andrew P. (committee member), Williams, Robert C. (committee member).

Subjects/Keywords: Polyphenols; natural antimicrobials; grape seed extract; Vitis vinifera; peanut skin extract; E. coli O157:H7; Listeria monocytogenes; S. aureus; Salmonella Typhimurium

…8 Peanut Skin Extract… …21 Chapter 3: Evaluation of Peanut Skin Extract, Grape Seed Extract, and Grape Seed Extract… …seed extract, a type B procyanidin, and peanut skin extract, a type A procyanidin, against… …which crude extract, grape seed or peanut skin, demonstrates the most inhibition against four… …Meeran et al. 2009). Peanut Skin Extract Peanut skins are traditionally consumed as part… 

Record DetailsSimilar RecordsGoogle PlusoneFacebookTwitterCiteULikeMendeleyreddit

APA · Chicago · MLA · Vancouver · CSE | Export to Zotero / EndNote / Reference Manager

APA (6th Edition):

Levy, J. M. (2014). Evaluation of Peanut Skin Extract, Grape Seed Extract, and Grape Seed Extract Fractions to Reduce Populations of Select Foodborne Pathogens. (Masters Thesis). Virginia Tech. Retrieved from http://hdl.handle.net/10919/48896

Chicago Manual of Style (16th Edition):

Levy, Jason M. “Evaluation of Peanut Skin Extract, Grape Seed Extract, and Grape Seed Extract Fractions to Reduce Populations of Select Foodborne Pathogens.” 2014. Masters Thesis, Virginia Tech. Accessed November 28, 2020. http://hdl.handle.net/10919/48896.

MLA Handbook (7th Edition):

Levy, Jason M. “Evaluation of Peanut Skin Extract, Grape Seed Extract, and Grape Seed Extract Fractions to Reduce Populations of Select Foodborne Pathogens.” 2014. Web. 28 Nov 2020.

Vancouver:

Levy JM. Evaluation of Peanut Skin Extract, Grape Seed Extract, and Grape Seed Extract Fractions to Reduce Populations of Select Foodborne Pathogens. [Internet] [Masters thesis]. Virginia Tech; 2014. [cited 2020 Nov 28]. Available from: http://hdl.handle.net/10919/48896.

Council of Science Editors:

Levy JM. Evaluation of Peanut Skin Extract, Grape Seed Extract, and Grape Seed Extract Fractions to Reduce Populations of Select Foodborne Pathogens. [Masters Thesis]. Virginia Tech; 2014. Available from: http://hdl.handle.net/10919/48896

.