Abstract: This invention discloses a composition for stabilizing ascorbic acid derivative and the application thereof. The mentioned composition comprises ascorbic acid derivative, buffer, phosphonic acid derivative and at least one alcohol. The yellowish and degradation of ascorbic acid derivative can be efficiently decreased by the mentioned composition. Moreover, the mentioned composition can be used in topical composition, such as toner, serum, lotion, cream.
November 30, 2012
June 5, 2014
Lin-Chao Chen, Yu-Ling Shiu, Chia-Pei Lee, Chao-Yang Lee
Abstract: A photosensitive composition containing a compound having a specific structure, a pattern-forming method using the photosensitive composition, and a compound having a specific structure used in the photosensitive composition.
Abstract: The present invention relates to the field of organic synthesis and more particularly to a new process for the optical resolution of a precursor of sclareolide. This process includes the reaction of [(1RS,2RS,4aSR,8aSR)-2-hydroxy-2,5,5,8a-tetramethyldecahydronaphthalen-1-yl]acetic acid, or an alkaline salt thereof, with an enantiomer of the 2-(methylamino)-1-phenyl-1-propanol, or an ammonium salt thereof respectively, which is used as resolving agent.
Abstract: The invention provides lanthanide chelates capable of intense luminescence. The celates comprise a lanthanide chelator covalently joined to a coumarin-like or quinolone-like sensitizer. Exemplary sensitzers include 2- or 4-quinolones, 2- or 4-coumarins, or derivatives thereof e.g. carbostyril 124 (7-amino-4-methyl-2-quinolone), coumarin 120 (7-amino-4-methyl-2-coumarin), coumarin 124 (7-amino-4-(trifluoromethyl)-2-coumarin), aminomethyltrimethylpsoralen, etc.The chelates form high affinity complexes with lanthanides, such as terbium or europium, through chelator groups, such as DTPA. The chelates may be coupled to a wide variety of compounds to create specific labels, probes, diagnostic and/or therapeutic reagents, etc. The chelates find particular use in resonance energy transfer between chelate-lanthanide complexes and another luminescent agent, often a fluorescent non-metal based resonance energy acceptor.
June 29, 1994
Date of Patent:
April 22, 1997
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