Influence of nitrogen compounds in grapes on aroma compounds of wines

A Rapp, G Versini - Developments in food science, 1995 - Elsevier
Publisher Summary Aroma compounds, as a result of their pronounced effect on the sensory
organs, play a definitive role in the quality of the food and luxury products. As in the case …

Analysis of strawberry flavour–discrimination of aroma types by quantification of volatile compounds

D Ulrich, E Hoberg, A Rapp, S Kecke - … für Lebensmitteluntersuchung und …, 1997 - Springer
Over a period of 3 years, the essential volatile compounds of several strawberry varieties
were analysed by gas chromatography, gas chromatography-olfactometry and mass …

Effect of sunlight and shade on norisoprenoid levels in maturing Weisser Riesling and Chenin blanc grapes and Weisser Riesling wines

J Marais, CJ Van Wyk, A Rapp - 1992 - scholar.sun.ac.za
The 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 …

Some volatile aroma components of Vitis vinifera L. cv. Sauvignon blanc

PH Augustyn, A Rapp, CJ Van Wyk - South African Journal of …, 1982 - journals.ac.za
Volatile aroma components of Vitis vinifera L. cv. Sauvignon blanc grapes were studied to
identify the components responsible for the characteristic aroma of this grape cultivar. Thirty …

Effect of region on free and bound monoterpene and C13-N orisoprenoid concentrations in Weisser Riesling wines

J Marais, G Versini, CJ Van Wyk, A Rapp - 1992 - scholar.sun.ac.za
Free and bound monoterpene and C 13-norisoprenoid concentrations of Weisser Riesling
wines of different vintages and from different regions in South Africa, Germany and Northern …

Effect of Storage Time, Temperature and Region on the Levels of 1, l, 6-Trimethyl-1, 2-dihydronaphthalene and other Volatiles, and on Quality of Weisser Riesling …

J Marais, CJ Van Wyk, A Rapp - 1992 - scholar.sun.ac.za
A survey of the concentration levels of 1, 1, 6-trimethyl-1, 2-dihydronaphthalene (TDN) in
wines of different cultivars, vintages and regions was conducted. The TDN concentrations of …

Carotenoid levels in maturing grapes as affected by climatic regions, sunlight and shade

J Marais, CJ Van Wyk, A Rapp - 1991 - scholar.sun.ac.za
The effect of climatic region, degree of ripeness, sunlight and shade on carotenoid
concentrations in Weisser Riesling and Chenin blanc grapes was investigated. Lutein and beta-…

Effect of skin-contact time and temperature on juice and wine composition and wine quality

J Maraisa, A Rapp - South African Journal of Enology and Viticulture, 1988 - journals.ac.za
The effect of skin-contact time (4 hours and 15 hours) and temperature (0 C and 20 C for 20
hours) on terpene, phenol and acetamide concentrations in Gewiirztraminer juices and …

Identification and significance of several sulfur-containing compounds in wine

A Rapp, M Güntert, J Almy - American journal of enology …, 1985 - Am Soc Enol Viticulture
Samples of German wines (Riesling, Scheurebe, Morio-Muskat, Bacchus) were continuously
extracted with Freon 11:dichloromethane; the extracts were concentrated and submitted to …

Foreign and undesirable flavours in wine

A Rapp, P Pretorius, D Kugler - Developments in food science, 1992 - Elsevier
The components responsible for unpleasant odors in wines are often present in such low
quantities that their isolation and identification requires special techniques. One of these …