title: Novel character impact compounds in Yuzu (Citrus junos Sieb. ex Tanaka) peel oil.
abstract: 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 (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.
authors.affiliation: Technical Research Center, T. Hasegawa Co., Ltd., 335 Kariyado, Nakahara-ku, Kawasaki-shi 211-0022, Japan. norio_miyazawa@t-hasegawa.co.jp
authors.forename: Norio
authors.initials: N
authors.lastname: Miyazawa
authors.forename: Naomi
authors.initials: N
authors.lastname: Tomita
authors.forename: Yoshiko
authors.initials: Y
authors.lastname: Kurobayashi
authors.forename: Akira
authors.initials: A
authors.lastname: Nakanishi
authors.forename: Yasutaka
authors.initials: Y
authors.lastname: Ohkubo
authors.forename: Tomoko
authors.initials: T
authors.lastname: Maeda
authors.forename: Akira
authors.initials: A
authors.lastname: Fujita
mesh_terms: D002957:Citrus / Q000737:chemistry*; D005638:Fruit / Q000737:chemistry; D010936:Plant Extracts / Q000032:analysis*; D010938:Plant Oils / Q000737:chemistry*; D055549:Volatile Organic Compounds / Q000032:analysis*
chemical_list: D010936:Plant Extracts; D010938:Plant Oils; D055549:Volatile Organic Compounds