Esterification of free fatty acids (Biodiesel) using nano sulfated-titania as catalyst in solvent-free conditions
作者:Mona Hosseini-Sarvari、Esmat Sodagar
DOI:10.1016/j.crci.2012.10.016
日期:2013.3
Résumé Nano sulfated titania was tested as catalyst for esterification of free fatty acids, specially methanolic and ethanolic esterification of stearic acid (biodiesels). Factorial design evidenced a positive effect of reaction temperature, amount of catalyst, and solvents on ester conversion. This nano-sized sulfated titania has been prepared by a sol-gel hydrothermal process. This prepared sulfated titania showed high catalytic activity in direct esterification of fatty acids as well as benzoic acids with various alcohols and phenols under solvent-free conditions. This method is of great value because of its environmentally benign character, easy handling, high yields, convenient operation, and green. FT-IR studies are shown that the catalyst can be reused for acylation without loss of catalytic activity.
BIODEGRADABLE LIPIDS FOR THE DELIVERY OF ACTIVE AGENTS
申请人:ALNYLAM PHARMACEUTICALS, INC.
公开号:US20160009637A1
公开(公告)日:2016-01-14
The present invention relates to a cationic lipid having one or more biodegradable groups located in the mid- or distal section of a lipidic moiety (e.g., a hydrophobic chain) of the cationic lipid. These cationic lipids may be incorporated into a lipid particle for delivering an active agent, such as a nucleic acid. The invention also relates to lipid particles comprising a neutral lipid, a lipid capable of reducing aggregation, a cationic lipid of the present invention, and optionally, a sterol. The lipid particle may further include a therapeutic agent such as a nucleic acid.
The present invention relates to topical compositions comprising 5α-reductase inhibitors. The present invention also includes processes for preparation of such topical compositions and methods of using them.
Novel bisexual attractants, aggregants and arrestants for adults and larvae of codling moth and other species of lepidoptera
申请人:——
公开号:US20020061324A1
公开(公告)日:2002-05-23
Novel bisexual attractants for lepidopterous insect pests isolated from pears or apples. A method for monitoring and control of codling moth and other species of Lepidoptera comprising a lure and kill, mating disruption or mass trapping strategy. A method of using a formulation containing the bisexual attractants with or without an insecticide and/or pheromone for control of the insect pests.