2,013 research outputs found
Effect of sunlight and shade on norisoprenoid levels in maturing weisser riesling and chenin blanc grapes and weisser riesling wines
No full textCITATION: 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.The original publication is available at http://www.journals.ac.za/index.php/sajevThe 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.http://www.journals.ac.za/index.php/sajev/article/view/2191Publisher's versio
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 wines
No full textCITATION: Marais, J., Van Wyk, C. J. & Rapp, A. 1992. 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 wines. South African Journal of Enology & Viticulture, 13(1):33-44, doi:10.21548/13-1-2197.The original publication is available at http://www.journals.ac.za/index.php/sajevA 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 South African Weisser Riesling wines were higher than those from Germany and Italy, and those of other cultivars. The effect of storage time and temperature on free and precursor TDN concentrations, on the concentrations of free trans-vitispirane, some monoterpenes, esters and higher alcohols, and on the quality of Weisser Riesling wines was investigated. Three Weisser Riesling wines from different regions were stored at 15°C and 30°C for four years and one year, respectively. These wines were analysed periodically by gas chromatography and evaluated sensorially. The concentrations of TDN, trans-vitispirane, 2,6-dimethyl-7-octen-2,6-diol and trans-1,8-terpin, and the intensity of the bottle-aged kerosene-like character increased significantly with ageing. During the same period, significant decreases occurred in the concentrations of diendiol-1, linalool, i-amyl acetate, ethyl caproate, hexyl acetate, 2-phenethyl acetate, hexanol, 2-phenyl ethanol, and in the intensity of young wine character. alpha-Terpineol showed significant increases followed by decreases under the same conditions. These changes in concentrations were more prominent at 30°C than at 15°C storage. The development of the kerosene character in Weisser Riesling wines was restricted to sensorially acceptable levels by storage at 15°C.http://www.journals.ac.za/index.php/sajev/article/view/2197Publisher's versio
Effect of region on free and bound monoterpene and C13-N orisoprenoid concentrations in Weisser Riesling wines
No full textCITATION: Marais, J., et al. 1992. Effect of region on free and bound monoterpene and C13-N orisoprenoid concentrations in Weisser Riesling Wines. South African Journal of Enology & Viticulture, 13(2):71-77, doi:10.21548/13-2-2177.The original publication is available at http://www.journals.ac.za/index.php/sajevFree 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 Italy were compared. The concentrations of some of these compounds differed between climatic regions. For example, older Weisser Riesling wines from South Africa displayed significantly higher 1,1,6-trimethyl-1,2-dihydronaphthalene (TDN), trans-vitispirane and trans- 1,8-terpin concentrations than those from the cooler European countries. Canonical and stepwise discriminant analysis of the wine data allowed the successful classification of the wines according to origin. A comparison of meteorological data of the countries revealed that in the cooler wine regions of Germany and Northern Italy the average daily temperatures were lower, the average monthly rainfall higher and the daily sunshine hours fewer than in the warmer South African wine regions.http://www.journals.ac.za/index.php/sajev/article/view/2177Publisher's versio
Measurement of the Ratio of Branching Fractions B (B[subscript c][superscript +] → J/ψτ[superscript +]ν[superscript τ]) / B (B[subscript c][superscript +] → J/ψμ[superscript +]ν[subscript μ]
No full textA measurement is reported of the ratio of branching fractions R(J/ψ)=B(B[subscript c][superscript +]→J/ψτ[superscript +]ν[subscript τ])/B(B[subscript c][superscript +]→J/ψμ[superscript +]ν[subscript μ]), where the τ[superscript +] lepton is identified in the decay mode τ[superscript +]→μ[superscript +]ν[subscript μ]ν[superscript τ]. This analysis uses a sample of proton-proton collision data corresponding to 3.0 fb[superscript -1] of integrated luminosity recorded with the LHCb experiment at center-of-mass energies of 7 and 8 TeV. A signal is found for the decay B[subscript c][superscript +]→J/ψτ[superscript +]ν[subscript τ] at a significance of 3 standard deviations corrected for systematic uncertainty, and the ratio of the branching fractions is measured to be R(J/ψ)=0.71±0.17(stat)±0.18(syst). This result lies within 2 standard deviations above the range of central values currently predicted by the standard model.National Science Foundation (U.S.
AMČR - projekt C-201228947
No full textStav: 6Podnět: Trafostanice, kabely nízkého napětí - 17CH Weisser
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 Wines
No full textA 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 South African Weisser Riesling wines were higher than those from Germany and Italy, and those of other cultivars. The effect of storage time and temperature on free and precursor TDN concentrations, on the concentrations of free trans-vitispirane, some monoterpenes, esters and higher alcohols, and on the quality of Weisser Riesling wines was investigated. Three Weisser Riesling wines from different regions were stored at 15°C and 30°C for four years and one year, respectively. These wines were analysed periodically by gas chromatography and evaluated sensorially. The concentrations of TDN, trans-vitispirane, 2,6-dimethyl-7-octen-2,6-diol and trans-1,8-terpin, and the intensity of the bottle-aged kerosene-like character increased significantly with ageing. During the same period, significant decreases occurred in the concentrations of diendiol-1, linalool, i-amyl acetate, ethyl caproate, hexyl acetate, 2-phenethyl acetate, hexanol, 2-phenyl ethanol, and in the intensity of young wine character. alpha-Terpineol showed significant increases followed by decreases under the same conditions. These changes in concentrations were more prominent at 30°C than at 15°C storage. The development of the kerosene character in Weisser Riesling wines was restricted to sensorially acceptable levels by storage at 15°C
Erfahrung und Erwartung als Argumente in Hegels Reformbill-Schrift und in der parlamentarischen Debatte in England
No full textSteinmetz W. Erfahrung und Erwartung als Argumente in Hegels Reformbill-Schrift und in der parlamentarischen Debatte in England. In: Jamme C, Weisser-Lohmann E, eds. Politik und Geschichte. Zu den Intentionen von G.W.F. Hegels Reformbill-Schrift. Bonn: Bouvier Verlag; 1995: 127-150
Effect of Region on Free and Bound Monoterpene and C13-N orisoprenoid Concentrations in Weisser Riesling Wines
No full textFree 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 Italy were compared. The concentrations of some of these compounds differed between climatic regions. For example, older Weisser Riesling wines from South Africa displayed significantly higher 1,1,6-trimethyl-1,2-dihydronaphthalene (TDN), trans-vitispirane and trans- 1,8-terpin concentrations than those from the cooler European countries. Canonical and stepwise discriminant analysis of the wine data allowed the successful classification of the wines according to origin. A comparison of meteorological data of the countries revealed that in the cooler wine regions of Germany and Northern Italy the average daily temperatures were lower, the average monthly rainfall higher and the daily sunshine hours fewer than in the warmer South African wine regions
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