Effect of sunlight and shade on norisoprenoid levels in maturing weisser riesling and chenin blanc grapes and weisser riesling wines

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dc.contributor.authorMarais, J.en_ZA
dc.contributor.authorVan Wyk, C. J.en_ZA
dc.contributor.authorRapp, A.en_ZA
dc.date.accessioned2017-06-13T06:57:15Z
dc.date.available2017-06-13T06:57:15Z
dc.date.issued1992
dc.descriptionCITATION: Marais, J., Van Wyk, C. J. & Rapp, A. 1992. Effect of sunlight and shade on N orisoprenoid levels in maturing weisser riesling and chenin blanc grapes and weisser riesling wines. South African Journal of Enology & Viticulture, 13(1):23-32, doi:10.21548/13-1-2191.en_ZA
dc.descriptionThe original publication is available at http://www.journals.ac.za/index.php/sajeven_ZA
dc.description.abstractThe effect of sunlight, shade and degree of ripeness on potentially volatile C13-norisoprenoid concentrations in Weisser Riesling grapes and wines and in Chenin blanc grapes, was investigated. Norisoprenoids were released from their bound forms by acid and enzymatic hydrolysis. With few exceptions, norisoprenoid concentrations were significantly higher in sun-exposed grapes than in shaded grapes. Significant increases in norisoprenoid concentrations were observed with an increase in ripeness. Microclimatic conditions during grape ripening for the production of Weisser Riesling wine with a potential to form lower concentrations of TDN during ageing are proposed.en_ZA
dc.description.urihttp://www.journals.ac.za/index.php/sajev/article/view/2191
dc.description.versionPublisher's versionen_ZA
dc.format.extent10 pages : illustrationsen_ZA
dc.identifier.citationMarais, J., Van Wyk, C. J. & Rapp, A. 1992. Effect of sunlight and shade on N orisoprenoid levels in maturing weisser riesling and chenin blanc grapes and weisser riesling wines. South African Journal of Enology & Viticulture, 13(1):23-32, doi:10.21548/13-1-2191en_ZA
dc.identifier.issn2224-7904 (online)
dc.identifier.issn0253-939X (print)
dc.identifier.otherdoi:10.21548/13-1-2191
dc.identifier.urihttp://hdl.handle.net/10019.1/101757
dc.language.isoen_ZAen_ZA
dc.publisherSouth African Society for Enology and Viticultureen_ZA
dc.rights.holderSouth African Society for Enology and Viticultureen_ZA
dc.subjectWine and wine makingen_ZA
dc.subjectWine qualityen_ZA
dc.subjectRiesling (Wine) -- Qualityen_ZA
dc.subjectGrapes -- Climatic factorsen_ZA
dc.subjectGrapes -- Norisoprenoid levelsen_ZA
dc.titleEffect of sunlight and shade on norisoprenoid levels in maturing weisser riesling and chenin blanc grapes and weisser riesling winesen_ZA
dc.typeArticleen_ZA
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