| Hydrodynamic cavitation to improve bulk fluid to surface mass transfer in a nonimmersed ultraviolet system for minimal processing of opaque and transparent fluid foods. | |
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MedLine Citation:
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PMID: 18034735 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Ultraviolet (UV)-induced chemical reactions and inactivation of microorganisms in transparent and opaque fluids are strongly dependent upon the homogenous exposure of the target species to the UV irradiation. Current UV technologies used in water disinfection and food preservation applications have limited efficacy due to suspended particles shading target species. An Ultraviolet-Shockwave Power Reactor (UV-SPR) consisting of an inner rotating rotor and a stationary quartz housing and 2 end plates was used to induce 'controlled cavitation.' Eight UV low-pressure mercury lamps spaced uniformly were installed lengthwise around the quartz housing periphery. A KI to I(3) (-)chemical dosimeter for UV was used to quantify photons received by fluid in the annular space of the SPR. UV dose (J/m(2)) increased from 97 J/m(2) at 0 rpm to over 700 J/m(2) for SPR speeds above 2400 rpm. Inactivation of E. coli 25922 in apple juice and skim milk in the UV-SPR at exit temperatures below 45 degrees C was greater than 4.5 and 3 logs, respectively. The UV-SPR system proved successful in increasing the mass transfer of transparent and opaque fluid to the UV irradiated surface. |
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Authors:
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P J Milly; R T Toledo; J Chen; B Kazem |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Journal of food science Volume: 72 ISSN: 1750-3841 ISO Abbreviation: J. Food Sci. Publication Date: 2007 Nov |
Date Detail:
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Created Date: 2007-11-23 Completed Date: 2008-03-24 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 0014052 Medline TA: J Food Sci Country: United States |
Other Details:
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Languages: eng Pagination: M407-13 Citation Subset: IM |
Affiliation:
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Dept. of Food Science and Technology, The Univ. of Georgia, Athens, GA 30602-7610, USA. paulmilly@hotmail.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Animals Beverages / microbiology* Colony Count, Microbial Disinfection / instrumentation, methods* Equipment Design Escherichia coli / growth & development, radiation effects Food Irradiation / instrumentation*, methods* Food Microbiology Malus / microbiology Milk / microbiology Radiation Dosage Ultraviolet Rays* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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