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Isolation of novel glucosides related to gingerdiol from ginger and their antioxidative activities.
Sekiwa Y, Kubota K, Kobayashi A. Sekiwa Y, et al. Among authors: kobayashi a. J Agric Food Chem. 2000 Feb;48(2):373-7. doi: 10.1021/jf990674x. J Agric Food Chem. 2000. PMID: 10691642
Their structures were determined as 1-(4-O-beta-D-glucopyranosyl-3-methoxyphenyl)-3,5-dihydroxydecane (1) and 5-O-beta-D-glucopyranosyl-3-hydroxy-1-(4-hydroxy-3-methoxyphenyl)deca ne (2) by HRFAB-MS and NMR analyses, and the absolute configurations of both aglycons were identifie …
Their structures were determined as 1-(4-O-beta-D-glucopyranosyl-3-methoxyphenyl)-3,5-dihydroxydecane (1) and 5-O-beta-D-glucopyranosyl-3-hy …
Isolation of Some Glucosides as Aroma Precursors from Ginger.
Sekiwa Y, Mizuno Y, Yamamoto Y, Kubota K, Kobayashi A, Koshino H. Sekiwa Y, et al. Among authors: kobayashi a. Biosci Biotechnol Biochem. 1999;63(2):384-9. doi: 10.1271/bbb.63.384. Biosci Biotechnol Biochem. 1999. PMID: 27393063
A glycosidically bound fraction was prepared by adsorbing a 80% methanol extract from fresh rhizomes of ginger onto a column of Amberlite XAD-2 resin and successively eluting with ethyl acetate or methanol. ...
A glycosidically bound fraction was prepared by adsorbing a 80% methanol extract from fresh rhizomes of ginger onto a c
First isolation of geranyl disaccharides from ginger and their relations to aroma formation.
Sekiwa Y, Kobayashi A, Kubota K, Takenaka M. Sekiwa Y, et al. Among authors: kobayashi a. Nat Prod Lett. 2001;15(4):267-74. doi: 10.1080/10575630108041291. Nat Prod Lett. 2001. PMID: 11833622
After incubating each glycoside with a crude enzyme solution prepared from ginger, geraniol was liberated in all of those fractions. ...
After incubating each glycoside with a crude enzyme solution prepared from ginger, geraniol was liberated in all of those fractions. …
Isolation of some glycosides as aroma precursors in young leaves of Japanese pepper (Xanthoxylum piperitum DC.).
Jiang L, Kojima H, Yamada K, Kobayashi A, Kubota K. Jiang L, et al. Among authors: kobayashi a. J Agric Food Chem. 2001 Dec;49(12):5888-94. doi: 10.1021/jf0104937. J Agric Food Chem. 2001. PMID: 11743780
In addition, (3S,6R)-cis-linalool-3,6-oxide beta-D-glucopyranoside, which absolute configuration was the first determined, and six known glycosides, citronellyl beta-D-glucopyranoside, linalyl 6-O-beta-D-apiofuranosyl-beta-D-glucopyranoside, (Z)-3-hexenyl beta-D-glucopyranoside, …
In addition, (3S,6R)-cis-linalool-3,6-oxide beta-D-glucopyranoside, which absolute configuration was the first determined, and six known gly …
Analysis of glycosidically bound aroma precursors in tea leaves. 3. Change in the glycoside content of tea leaves during the oolong tea manufacturing process.
Wang D, Kubota K, Kobayashi A, Juan IM. Wang D, et al. Among authors: kobayashi a. J Agric Food Chem. 2001 Nov;49(11):5391-6. doi: 10.1021/jf010235+. J Agric Food Chem. 2001. PMID: 11714333
A direct qualitative and quantitative determination of the glycosides of tea aroma compounds at the four stages of the oolong tea manufacturing process (plucking, solar withering, indoor withering, and oolong tea product) was carried out by a capillary gas chromatog
A direct qualitative and quantitative determination of the glycosides of tea aroma compounds at the four stages of the oolong tea man
Analysis of glycosidically bound aroma precursors in tea leaves. 2. Changes in glycoside contents and glycosidase activities in tea leaves during the black tea manufacturing process.
Wang D, Kurasawa E, Yamaguchi Y, Kubota K, Kobayashi A. Wang D, et al. Among authors: kobayashi a. J Agric Food Chem. 2001 Apr;49(4):1900-3. doi: 10.1021/jf001077+. J Agric Food Chem. 2001. PMID: 11308343
Changes in the amounts of these glycosides during the manufacturing process were investigated by using a capillary gas chromatographic--mass spectrometric analysis after trifluoroacetyl derivatization of the tea glycosidic fractions. ...The glycosidase activities remained …
Changes in the amounts of these glycosides during the manufacturing process were investigated by using a capillary gas chromatographi …
Antioxidative activity in the pericarp and seed of Japanese pepper (Xanthoxylum piperitum DC).
Hisatomi E, Matsui M, Kubota K, Kobayashi A. Hisatomi E, et al. Among authors: kobayashi a. J Agric Food Chem. 2000 Oct;48(10):4924-8. doi: 10.1021/jf000252j. J Agric Food Chem. 2000. PMID: 11052757
Analysis of glycosidically bound aroma precursors in tea leaves. 1. Qualitative and quantitative analyses of glycosides with aglycons as aroma compounds.
Wang D, Yoshimura T, Kubota K, Kobayashi A. Wang D, et al. Among authors: kobayashi a. J Agric Food Chem. 2000 Nov;48(11):5411-8. doi: 10.1021/jf000443m. J Agric Food Chem. 2000. PMID: 11087494
Those compounds were used to carry out a direct qualitative and quantitative determination of the glycosides as aroma precursors in different tea cultivars by capillary gas chromatographic-mass spectrometric (GC-MS) analyses after trifluoroacetyl conversion of the tea glyc …
Those compounds were used to carry out a direct qualitative and quantitative determination of the glycosides as aroma precursors in d …
Isolation and identification of trans-2- and trans-3-hydroxy-1,8-cineole glucosides from Alpinia galanga.
Someya Y, Kobayashi A, Kubota K. Someya Y, et al. Among authors: kobayashi a. Biosci Biotechnol Biochem. 2001 Apr;65(4):950-3. doi: 10.1271/bbb.65.950. Biosci Biotechnol Biochem. 2001. PMID: 11388479
Their structures were analyzed by FAB-MS and NMR spectrometry, and the absolute configulation of each aglycone was determined by using a GC-MS analysis with a capillary column coated with a chiral stationary phase. The composition of the diastereomers of (1R, …
Their structures were analyzed by FAB-MS and NMR spectrometry, and the absolute configulation of each aglycone was determined by using a
Enantiomeric purity and odor characteristics of 2- and 3-acetoxy-1, 8-cineoles in the rhizomes of Alpinia galanga willd.
Kubota K, Someya Y, Yoshida R, Kobayashi A, Morita T, Koshino H. Kubota K, et al. Among authors: kobayashi a. J Agric Food Chem. 1999 Feb;47(2):685-9. doi: 10.1021/jf9807465. J Agric Food Chem. 1999. PMID: 10563953
These acetates were subjected to chiral GC, using a cyclodextrin column, and the enantiomeric purity of trans- and cis-1, 3,3-trimethyl-2-oxabicyclo[2.2.2]octan-5- and 6-yl acetates in the aroma concentrate from the rhizomes of Alpinia galanga was determined as 93.9 (5S), …
These acetates were subjected to chiral GC, using a cyclodextrin column, and the enantiomeric purity of trans- and cis-1, 3,3-trimeth …
2,802 results
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