COMPOSITION AND METHOD FOR REDUCING HYDRATE AGGLOMERATION
申请人:Webber Peter A.
公开号:US20120157351A1
公开(公告)日:2012-06-21
Disclosed and claimed is a composition and method of inhibiting the formation of hydrate agglomerates in a fluid comprising water, gas, and optionally liquid hydrocarbon comprising adding to the fluid an effective anti-agglomerant amount of the following formula and optionally salts thereof:
wherein each R
1
is independently absent, C
1
-C
10
alkyl, benzyl, or H; wherein R
2
is C
1
-C
10
alkyl; wherein R
3
C
1
-C
10
alkyl; and wherein R
4
is C
4
-C
22
alkyl or alkenyl.
Nitrogen-containing lipids prepared from the conjugate addition of amines to acrylates, acrylamides, or other carbon-carbon double bonds conjugated to electron-withdrawing groups are described. Methods of preparing these lipids from commercially available starting materials are also provided. These amine-containing lipids or salts forms of these lipids are preferably biodegradable and biocompatible and may be used in a variety of drug delivery systems. Given the amino moiety of these lipids, they are particularly suited for the delivery of polynucleotides. Complexes or nanoparticles containing the inventive lipid and polynucleotide have been prepared. The inventive lipids may also be used to in preparing microparticle for drug delivery. They are particularly useful in delivering labile agents given their ability to buffer the pH of their surroundings.
THERAPEUTIC COMPOSITIONS
申请人:Tzianabos Arthur
公开号:US20110052673A1
公开(公告)日:2011-03-03
Therapeutic compositions containing therapeutic agents and nitrogen-containing lipids are described. These tertiary amine-containing polymers are preferably biodegradable and biocompatible. Nanoparticles, microparticles, and complexes containing lipid/therapeutic agent complexes are also described.
Study of the Chemoselectivity in the Aminolysis Reaction of Methyl Acrylate Catalysed by Lipase B fromCandida antarctica
作者:Oliver Torre、Vicente Gotor-Fernández、Ignacio Alfonso、Luis Fernando García-Alles、Vicente Gotor
DOI:10.1002/adsc.200505025
日期:2005.6
The aminolysisreaction of methylacrylate (MA) with N,N-dimethyl-1,3-propanediamine (DMAPA) in organic solvents has been optimised using lipaseB from Candida antarctica (CAL-B) as biocatalyst. A kinetic study about the influence of the reactant concentrations, organic solvent, temperature and enzyme form has been developed focused on minimising the formation of the Michael addition products. The