Effect of heteroatoms in the side chains of disklike molecules on the formation of discotic liquid crystalline phases
摘要:
Incorportion of oxygen and sulfur atoms into the side chains of discotic liquid crystals generally results in a depression of both the crystal to discotic and discotic to isotropic transition temperatures relative to the n-alkyl analogue. In contrast, replacement of the methylenes in side-chain positions 4 of 2,3,6,7,10,11-hexakis(alkanoyloxy)triphenylenes increases the clearing (M-I) temperature from 120 to 200-degrees-C. This effect is specific for sulfur substitution, to the triphenylene series, and to the 4-position. It is not expected, based on a simple model for discotic-phase formation.
Pharmaceutical composition for treatment of diseases associated with decrease in bone mass comprising EP4 agonist as active ingredient
申请人:Ono Pharmaceutical Co., Ltd.
公开号:EP2255829A2
公开(公告)日:2010-12-01
A pharmaceutical composition for topical administration for prevention and/or treatment of diseases associated with decrease in bone mass comprising an EP4 agonist as an active ingredient. An EP4 agonist, in which includes a compound possessing prostaglandin skeleton as a representative, possesses promoting action on bone formation, so it is useful for prevention and/or treatment of diseases associated with decrease in bone mass (bone diseases such as primary osteoporosis, secondary osteoporosis, bone metastasis of cancer, hypercalcemia, Paget's disease, bone loss and bone necrosis, postoperative osteogenesis, alternative therapy for bone grafting).
Sulfur containing polyhydroxyalkanoate compositions and method of production
申请人:Tepha, Inc.
公开号:US20020106764A1
公开(公告)日:2002-08-08
A class of biopolymer including sulfur in the form of a thioester in the polymer backbone or a thioether in the polymer side chains has been developed. These are preferably produced by fermentation of bacteria with appropriate sulfur containing substrates, which are incorporated by a broad spectrum polyhydroxyalkanoate (“PHA”) polymerase. The sulfur-containing PHAs allow various applications and uses in industry. Representative embodiments of the applications of the sulfur-containing PHAs include their uses in the packaging industry, medicine, pharmacy, agriculture or food industry, as active agents or as coatings, packaging, or carriers.
Hard acid and soft nucleophile systems. 5. Ring-opening reaction of lactones to .omega.-alkylthio- or .omega.-arylthio carboxylic acids with aluminum halide and thiol