| Beide Seiten der vorigen RevisionVorhergehende Überarbeitung | |
| vitis_vinifera_l [2024/08/10 14:25] – andreas | vitis_vinifera_l [2025/04/08 15:27] (aktuell) – andreas |
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| "High sun exposure of the vines and long-term storage of the wines cause formation of the C13-norisoprenoid [[https://pubs.acs.org/doi/full/10.1021/acs.jafc.3c08230|1,1,6-trimethyl-1,2-dihydronaphthalene (TDN)]] eliciting a kerosene-like flavor in Riesling wines... While trained panelists were able to distinguish Riesling wines with TDN levels of 2.3 µg/L, consumer detection threshold of 14.7 µg/L TDN determined with 156 consumers exceeded the threshold of the trained panel by a factor of five and varied by consumers’ gender. Rejecting a Riesling wine due to its petrol off-flavor, 60 µg/L TDN were required in a young and 91 µg/L in an eight-year-old Riesling wine." \\ | "High sun exposure of the vines and long-term storage of the wines cause formation of the C13-norisoprenoid [[https://pubs.acs.org/doi/full/10.1021/acs.jafc.3c08230|1,1,6-trimethyl-1,2-dihydronaphthalene (TDN)]] eliciting a kerosene-like flavor in Riesling wines... While trained panelists were able to distinguish Riesling wines with TDN levels of 2.3 µg/L, consumer detection threshold of 14.7 µg/L TDN determined with 156 consumers exceeded the threshold of the trained panel by a factor of five and varied by consumers’ gender. Rejecting a Riesling wine due to its petrol off-flavor, 60 µg/L TDN were required in a young and 91 µg/L in an eight-year-old Riesling wine." \\ |
| [Ziegler, Michael. 1,1,6-Trimethyl-1,2-dihydronaphthalin (TDN) in Riesling - Sensorische Relevanz und Minimierungsstrategie. Diss. Technische Universität Kaiserslautern, 2020.] [[https://kluedo.ub.rptu.de/files/6136/Dissertation_Ziegler_201110.pdf|Dissertation (PDF)]] \\ | [Ziegler, Michael. 1,1,6-Trimethyl-1,2-dihydronaphthalin (TDN) in Riesling - Sensorische Relevanz und Minimierungsstrategie. Diss. Technische Universität Kaiserslautern, 2020.] [[https://kluedo.ub.rptu.de/files/6136/Dissertation_Ziegler_201110.pdf|Dissertation (PDF)]] \\ |
| | "The variety Riesling stands out by developing a characteristic petrol-like odor note during aging, elicited by the aroma compound 1,1,6-trimethyl-1,2-dihydronaphthalene (TDN). The UV-dependent TDN contents differ largely among Rieslings grown in the northern versus the southern hemisphere. Highest TDN concentrations were found in Australian Rieslings, where TDN is a scoring ingredient. In contrast, in Rieslings from Europe, for example, TDN may be a tending cause of rejection. A human receptor for TDN has been unknown. Here, we report on the identification of OR8H1 as a TDN-selective odorant receptor, out of a library of 766 odorant receptor variants. OR8H1 is selectively tuned to six carbon ring structures, identified by screening a collection of 180 key food odorants, using a HEK-293 cell-based cAMP luminescence assay equipped with the GloSensor technology." \\ |
| | [Haag, Franziska, et al. "Petrol Note in Riesling - 1,1,6-Trimethyl-1,2-dihydronaphthalene (TDN) Selectively Activates Human Odorant Receptor OR8H1." Journal of Agricultural and Food Chemistry 72.9 (2024): 4888-4896] |
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| "Application of the aroma extract dilution analysis (AEDA) on a distillate prepared from freshly squeezed juice of Dornfelder grapes revealed (3Z)-hex-3-enal and trans-4,5-epoxy-(2E)-dec-2-enal with the highest flavor dilution (FD) factors. In contrast, in the final Dornfelder wine prepared thereof, the highest FD factors were found for 2-phenylethyl acetate, 2-phenylethan-1-ol, and (E)-β-damascenone. However, for example, among others, (3Z)-hex-3-enal no longer appeared as an important odorant." \\ | "Application of the aroma extract dilution analysis (AEDA) on a distillate prepared from freshly squeezed juice of Dornfelder grapes revealed (3Z)-hex-3-enal and trans-4,5-epoxy-(2E)-dec-2-enal with the highest flavor dilution (FD) factors. In contrast, in the final Dornfelder wine prepared thereof, the highest FD factors were found for 2-phenylethyl acetate, 2-phenylethan-1-ol, and (E)-β-damascenone. However, for example, among others, (3Z)-hex-3-enal no longer appeared as an important odorant." \\ |
