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Antimicrobial activity of nisin and hen lysozyme

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dc.contributor.advisor Daeschel, Mark
dc.creator Jaczynski, Jacek
dc.date.accessioned 2012-01-26T20:26:45Z
dc.date.available 2012-01-26T20:26:45Z
dc.date.copyright 1998-11-16
dc.date.issued 1998-11-16
dc.identifier.uri http://hdl.handle.net/1957/27253
dc.description Graduation date: 1999 en_US
dc.description.abstract Varying concentrations of the food preservatives nisin and lysozyme were adsorbed onto glass surfaces chemically modified to exhibit different degrees of hydrophobicity. The antimicrobial activity of the adsorbed preservatives was evaluated by documenting the ability of Listeria monocytogenes to adhere and grow on the glass surfaces. A bioluminescence protocol was developed to effectively enumerate bacterial cells adhered to glass. Lysozyme adsorption onto glass surfaces was monitored by labeling with ¹²⁵I. Results indicated that synergy was present for 0.9/0.1 molecular ratio of nisin/lysozyme. Synergistic effect was increasing gradually with the increase of nisin in the ratios tested. This trend was observed on both surface types. However, the magnitude of synergy was more pronounced on hydrophobic surfaces than on hydrophilic ones. Results from protein radiolabeling showed that lysozyme was adsorbed with higher mass to hydrophilic surfaces than to hydrophobic ones. en_US
dc.language.iso en_US en_US
dc.subject.lcsh Nisin en_US
dc.subject.lcsh Lysozyme en_US
dc.subject.lcsh Listeria monocytogenes en_US
dc.subject.lcsh Food -- Preservation en_US
dc.title Antimicrobial activity of nisin and hen lysozyme en_US
dc.type Thesis/Dissertation en_US
dc.degree.name Master of Science (M.S.) in Food Science and Technology en_US
dc.degree.level Master's en_US
dc.degree.discipline Agricultural Sciences en_US
dc.degree.grantor Oregon State University en_US
dc.description.digitization File scanned at 300 ppi (Monochrome, 256 Grayscale) using Scamax Scan+ V. on a Scanmax 412CD by InoTec in PDF format. LuraDocument PDF Compressor V. used for pdf compression and textual OCR. en_US
dc.description.peerreview no en_us

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