pH-Sensitive Self-Propelled Motion of Oil Droplets in the Presence of Cationic Surfactants Containing Hydrolyzable Ester Linkages
摘要:
Self-propelled oil droplets in a nonequilibrium system have drawn much attention as both a primitive type of inanimate chemical machinery and a dynamic model of the origin of life. Here, to create the pH-sensitive self-propelled motion of oil droplets, we synthesized cationic surfactants containing hydrolyzable ester linkages. We found that n-heptyloxybenzaldehyde oil droplets were self-propelled in the presence of ester-containing cationic surfactant. In basic solution prepared with sodium hydroxide, oil droplets moved as molecular aggregates formed on their surface. Moreover, the self-propelled motion in the presence of the hydrolyzable cationic surfactant lasted longer than that in the presence of nonhydrolyzable cationic surfactant. This is probably due to the production of a fatty acid by the hydrolysis of the ester-containing cationic surfactant and the subsequent neutralization of the fatty acid with sodium hydroxide,. A complex surfactant was formed in the aqueous solution because of the cation and anion combination. Because such complex formation can induce both a decrease in the interfacial tension of the oil droplet and self-assembly with n-heptyloxybenzaldehyde and lauric acid in the aqueous dispersion, the prolonged movement of the oil droplet may be explained by the increase in heterogeneity of the interfacial tension of the oil droplet triggered by the; hydrolysis of the ester-containing surfactant.
Pharmaceutical compositions of drug-oligomer conjugates and methods of treating diseases therewith
申请人:——
公开号:US20030069170A1
公开(公告)日:2003-04-10
Pharmaceutical compositions that include a drug-oligomer conjugate, a fatty acid component, and a bile salt component are described. The drug is covalently coupled to an oligomeric moiety. The fatty acid component and the bile salt component are present in a weight-to-weight ratio of between 1:5 and 5:1. Methods of treating diseases in a subject in need of such treatment using such pharmaceutical compositions are also provided, as are methods of providing such pharmaceutical compositions.
This invention relates to, among other items, 6-substituted benzoxaborole compounds and their use for treating bacterial infections.
这项发明涉及6-取代苯硼酯化合物等物品,以及它们用于治疗细菌感染的用途。
Expression of Fatty Acyl-CoA Ligase Drives One-Pot <i>De Novo</i> Synthesis of Membrane-Bound Vesicles in a Cell-Free Transcription-Translation System
作者:Ahanjit Bhattacharya、Christy J. Cho、Roberto J. Brea、Neal K. Devaraj
DOI:10.1021/jacs.1c05394
日期:2021.7.28
was coexpressed alongside the acyl-CoA ligase, the in situ assembled membranes were spontaneously decorated with protein. Our strategy of coupling gene expression with membrane lipid synthesis in a one-pot fashion could facilitate the generation of proteoliposomes and brings us closer to the bottom-up generation of synthetic cells using recombinant synthetic biology platforms.
Compounds of Formula I that inhibit the activity of the diacylglycerol acyltransferase 2 (DGAT2) and their uses in the treatment of diseases linked thereto in animals are described herein.
The present invention relates to GABA-linked anthracycline-lipid conjugates and to methods of using the conjugates to treat cancer. Methods for making the GABA-linked anthracycline lipid conjugates are also provided.