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citrus_x_junos [2015/12/04 15:01]
andreas
citrus_x_junos [2018/12/24 11:21] (aktuell)
andreas
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 "Yuzu (Citrus junos Sieb. ex Tanaka), a tree-grown fruit similar to a kind of sour orange, is widely used in Japanese food/​cooking for its pleasant flavor. To clarify the odor-active volatiles that differentiate yuzu from other citrus fruits, sensory evaluations were conducted on yuzu peel oil. The results revealed that the polar part of yuzu peel oil was the source of the characteristic aroma of fresh yuzu fruit. By aroma extract dilution analysis (AEDA) of the polar volatile part of yuzu peel oil, seven odorants were newly identified as odor-active volatiles in yuzu peel oil in the highest flavor dilution (FD) factors of 128 and 32: oct-1-en-3-one,​ (E)-non-4-enal,​ (E)-dec-4-enal,​ 4-methyl-4-mercaptopentan-2-one,​ (E)-non-6-enal,​ (6Z,​8E)-undeca-6,​8,​10-trien-3-one ([[http://​www.thegoodscentscompany.com/​data/​rw1603311.html|yuzunone]]),​ and (6Z,​8E)-undeca-6,​8,​10-trien-4-ol (Yuzuol). Among the most odor-active volatiles in yuzu, (E)-non-6-enal and Yuzunone were identified for the first time solely in yuzu peel oil and not in the peel of other citrus species, and Yuzuol was identified for the first time in nature. Sensory evaluation of yuzu aroma reconstitutions revealed that the newly identified compound, Yuzunone, contributes greatly to the distinct yuzu aroma."​ \\ "Yuzu (Citrus junos Sieb. ex Tanaka), a tree-grown fruit similar to a kind of sour orange, is widely used in Japanese food/​cooking for its pleasant flavor. To clarify the odor-active volatiles that differentiate yuzu from other citrus fruits, sensory evaluations were conducted on yuzu peel oil. The results revealed that the polar part of yuzu peel oil was the source of the characteristic aroma of fresh yuzu fruit. By aroma extract dilution analysis (AEDA) of the polar volatile part of yuzu peel oil, seven odorants were newly identified as odor-active volatiles in yuzu peel oil in the highest flavor dilution (FD) factors of 128 and 32: oct-1-en-3-one,​ (E)-non-4-enal,​ (E)-dec-4-enal,​ 4-methyl-4-mercaptopentan-2-one,​ (E)-non-6-enal,​ (6Z,​8E)-undeca-6,​8,​10-trien-3-one ([[http://​www.thegoodscentscompany.com/​data/​rw1603311.html|yuzunone]]),​ and (6Z,​8E)-undeca-6,​8,​10-trien-4-ol (Yuzuol). Among the most odor-active volatiles in yuzu, (E)-non-6-enal and Yuzunone were identified for the first time solely in yuzu peel oil and not in the peel of other citrus species, and Yuzuol was identified for the first time in nature. Sensory evaluation of yuzu aroma reconstitutions revealed that the newly identified compound, Yuzunone, contributes greatly to the distinct yuzu aroma."​ \\
 +Synthetic mixtures of (8E)-undeca-6,​8,​10-trien-3-one (6E/6Z 50:50) and (8E)-undeca-6,​8,​10-trien-4-ol (6E/6Z 65:35) showed fairly low thresholds in water of 0.010 ppb and 0.042 ppb respectively. \\
 [Novel character impact compounds in yuzu (Citrus junos Sieb. ex Tanaka) peel oil., Miyazawa, N., Tomita, N., Kurobayashi,​ Y., Nakanishi, A., Ohkubo, Y., Maeda, T., Fujita, A., Journal of agricultural and food chemistry, Vol.57(5), 2009, 1990-1996] [Novel character impact compounds in yuzu (Citrus junos Sieb. ex Tanaka) peel oil., Miyazawa, N., Tomita, N., Kurobayashi,​ Y., Nakanishi, A., Ohkubo, Y., Maeda, T., Fujita, A., Journal of agricultural and food chemistry, Vol.57(5), 2009, 1990-1996]
  
-| {{:​undeca-6_8_10-trien-3-one_6z8e.jpg|}} \\ yuzunone, [[http://www.thegoodscentscompany.com/data/rw1603311.html|(6Z,8E)-Undeca-6,​8,​10-trien-3-one]] \\ (one of the key aroma compounds of [[ferula_gummosa_boiss|galbanum]] | {{:​pentan2on_4me4thiol.jpg| 4-methyl-4-mercaptopentan-2-one }} \\ [[http://​www.thegoodscentscompany.com/​data/​rw1038251.html ​ \\ |4-methyl-4-mercaptopentan-2-one]] \\ (4-methyl-4-sulfanylpentan-2-one) |+|{{:​undeca-6_8_10-trien-3-one_6z8e.jpg|}} \\ yuzunone ​\\ //(balsamic fruity)//  |{{:undeca-6_8_10-trien-4-ol_6z8e.jpg|}} ​\\ yuzuol \\ //(balsamic fruity)// |{{:​pentan2on_4me4thiol.jpg| 4-methyl-4-mercaptopentan-2-one }} \\ [[http://​www.thegoodscentscompany.com/​data/​rw1038251.html ​ \\ |4-methyl-4-mercaptopentan-2-one]] \\ (4-methyl-4-sulfanylpentan-2-one) |
  
 "The essential oils of six different yuzu cultivars, Kumon (KUM), Nagano (NAG), Yasu (YAS), Jimoto (JIM), Komatsu Sadao (KOS) and Komatsu Koichi (KOK), were extracted by cold-pressing method. A total of 69 compounds of the six samples were identified. Application of GC-olfactometry and aroma extraction dilution analysis technique in three-fold stepwise dilution of the neat oil for all samples indicated eight odourants with the highest flavour dilution (FD) values. Those were limonene, α-pinene, α- and β-phellandrene,​ myrcene, γ-terpinene,​ (E)-β-farnesene and linalool. ‘KOS’ was differentiated from the other oil samples by showing the highest number of components having yuzu-like odour notes and also from the PCA analysis of the FD-factor values. This is the first time the aroma characteristics of yuzu essential oils of specified cultivars were investigated."​ \\ "The essential oils of six different yuzu cultivars, Kumon (KUM), Nagano (NAG), Yasu (YAS), Jimoto (JIM), Komatsu Sadao (KOS) and Komatsu Koichi (KOK), were extracted by cold-pressing method. A total of 69 compounds of the six samples were identified. Application of GC-olfactometry and aroma extraction dilution analysis technique in three-fold stepwise dilution of the neat oil for all samples indicated eight odourants with the highest flavour dilution (FD) values. Those were limonene, α-pinene, α- and β-phellandrene,​ myrcene, γ-terpinene,​ (E)-β-farnesene and linalool. ‘KOS’ was differentiated from the other oil samples by showing the highest number of components having yuzu-like odour notes and also from the PCA analysis of the FD-factor values. This is the first time the aroma characteristics of yuzu essential oils of specified cultivars were investigated."​ \\
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 [Scent and Chemistry, Günther Ohloff, Wilhelm Pickenhagen,​ Philip Kraft, Wiley-VCH, 2012, 234-235] ​ [Scent and Chemistry, Günther Ohloff, Wilhelm Pickenhagen,​ Philip Kraft, Wiley-VCH, 2012, 234-235] ​
  
 +{{https://​upload.wikimedia.org/​wikipedia/​commons/​thumb/​a/​a6/​Yuzu_oranges_%286459456959%29.jpg/​1024px-Yuzu_oranges_%286459456959%29.jpg}} \\
 +Citrus ×junos, Chiba Prefecture, Japan (December 2011) 
 +[[https://​creativecommons.org/​licenses/​by/​2.0/​|CC BY-SA 2.0]], Author Nikita [[https://​commons.wikimedia.org/​wiki/​File:​Yuzu_oranges_(6459456959).jpg|Wikimedia Commons]]
citrus_x_junos.txt · Zuletzt geändert: 2018/12/24 11:21 von andreas