Isolation of a Glucosidic β-Damascenone Precursor from Rose Petals
摘要:
The 9-O-beta-D-glucopyranoside of 3-hydroxy-7,8-didehydro-beta-ionol (1) has been isolated from a glycosidic XAD-2 extract obtained from rose petals. In addition to the beta-damascenone-generating compound 1, the following glycoconjugates have been isolated and characterized as peracetates: 3-hydroxy-7,8-dihydro-beta-ionol 9-O-beta-D-glucopyranoside (2), 3-hydroxy-7,8-dihydro-beta-ionol 3-O-beta-D-glucopyranoside (3), 2-phenylethyl-O-beta-D-glucopyranoside (4), 2-phenylethyl-O-beta-D-galactopyranoside (5), benzyl-O-beta-D-glucopyranoside (6), (2E)-2,6-dimethyl-6-hydroxyocta-2,7-dienyl-O-beta-D-glucopyranoside (7), (2Z)-2,6-dimethyl-6-hydroxyocta-2, 7-dienyl-O-beta-D-glucopyranoside (8), and (2E,6E)-2,6-dimethyl-1-hydroxyocta-2,6-dien-8-yl-O-beta-D-glucopyranoside (9).
Method and culture device for detecting yeasts and molds
申请人:3M INNOVATIVE PROPERTIES COMPANY
公开号:US10640743B2
公开(公告)日:2020-05-05
A thin film culture device for detecting yeast and mold microorganisms in a sample is provided. The culture device comprises a body comprising a self-supporting substrate having a first major surface and a second major surface; a first adhesive composition disposed on a portion of the first major surface of the substrate; a substantially dry, cold-water-soluble first hydrogel-forming composition adhered to the first adhesive composition; and a plurality of indicator agents. The plurality of indicator agents comprises three indicator agents for detecting distinct glycosidase enzyme activities, an indicator agent for detecting an alkyl esterase enzyme activity, and an indicator agent for detecting a phosphatase enzyme activity, wherein each of the plurality of indicator agents comprises a detectable reporter group. A method of using the culture device is also provided.
Kinetic Products Under Thermal Conditions: Rapid Entry into α/β-D-Galactofuranosides Using Microwave Irradiation and Selective Lewis Acids
作者:Soumava Santra、Emily Jonas、Jean-Paul Bourgault、Tarick El-Baba、Peter R. Andreana
DOI:10.1080/07328303.2011.585259
日期:2011.1.1
A modified Fischer-Lubineau reaction, employing microwave irradiation and selected Lewis acids such as Mn(ClO4)(2), Mn(C2H3O2)(3), FeCl3, CoCl2, and AgF as independent additives, induces rapid entry into alpha/beta-D-galactofuranosides in very good yield and purity.
METHODS FOR PROTEIN BINDING ENZYME COMPLEMENTATION ASSAYS
申请人:MICROGENICS CORPORATION
公开号:EP0199801A1
公开(公告)日:1986-11-05
EP0199801A4
申请人:——
公开号:EP0199801A4
公开(公告)日:1988-12-15
IMMOBILISATION OF LIGANDS BY RADIO-DERIVATIZED POLYMERS