Exposure of Self-Assembly Interiors to External Elements. A Kinetic Approach
摘要:
Five cationic surfactants, each bearing a single sulfur at various locations along their chains, were adsorbed into sodium dodecyl sulfate micelles. An oxidant, periodate, was added to the system, and the subsequent rate of thioether oxidation to sulfoxide, determined by NMR, was found to be diminished (more or less equally for all sulfur loci) by 2 orders of magnitude. In contrast, rates of hydrogen peroxide oxidation were hardly perturbed by micellization. Once again, however, there was no rate dependence on sulfur location within the chains. These results are interpreted in terms of a disordered micelle in which all chain positions have roughly equivalent access to the micelle surface. The kinetic method for assessing exposure to the external medium is applicable to self-assemblies and polymer systems wherever the NMR resolution so permits.
Exposure of Self-Assembly Interiors to External Elements. A Kinetic Approach
摘要:
Five cationic surfactants, each bearing a single sulfur at various locations along their chains, were adsorbed into sodium dodecyl sulfate micelles. An oxidant, periodate, was added to the system, and the subsequent rate of thioether oxidation to sulfoxide, determined by NMR, was found to be diminished (more or less equally for all sulfur loci) by 2 orders of magnitude. In contrast, rates of hydrogen peroxide oxidation were hardly perturbed by micellization. Once again, however, there was no rate dependence on sulfur location within the chains. These results are interpreted in terms of a disordered micelle in which all chain positions have roughly equivalent access to the micelle surface. The kinetic method for assessing exposure to the external medium is applicable to self-assemblies and polymer systems wherever the NMR resolution so permits.
[EN] INHIBITORS OF PROTEIN PRENYLTRANSFERASES<br/>[FR] INHIBITEURS DE PRÉNYLTRANSFÉRASES DE PROTÉINE
申请人:UNIV CALIFORNIA
公开号:WO2010014054A1
公开(公告)日:2010-02-04
The present invention is directed to novel compounds. These compounds can be useful in inhibiting the activity of protein prenyltransferases including GGTase I and/or RabGGTase. The compounds can also be used as anti-cancer therapeutics including as part of methods for treating cancer, in assays, and in kits.
Exposure of Self-Assembly Interiors to External Elements. A Kinetic Approach
作者:Fredric M. Menger、Lei Shi
DOI:10.1021/ja062807i
日期:2006.7.1
Five cationic surfactants, each bearing a single sulfur at various locations along their chains, were adsorbed into sodium dodecyl sulfate micelles. An oxidant, periodate, was added to the system, and the subsequent rate of thioether oxidation to sulfoxide, determined by NMR, was found to be diminished (more or less equally for all sulfur loci) by 2 orders of magnitude. In contrast, rates of hydrogen peroxide oxidation were hardly perturbed by micellization. Once again, however, there was no rate dependence on sulfur location within the chains. These results are interpreted in terms of a disordered micelle in which all chain positions have roughly equivalent access to the micelle surface. The kinetic method for assessing exposure to the external medium is applicable to self-assemblies and polymer systems wherever the NMR resolution so permits.