32582-64-2Relevant academic research and scientific papers
Methacrylate modified organosilicon quaternary ammonium salt as well as preparation method and application thereof
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Paragraph 0051; 0054-0056, (2020/08/09)
The invention discloses methacrylate modified organosilicon quaternary ammonium salt as well as a preparation method and application thereof. The methacrylate modified organosilicon quaternary ammonium salt disclosed by the invention simultaneously has a siloxane group, a cationic quaternary ammonium group and a methacrylate group, can achieve functions of a silane coupling agent, enhances the bonding strength and durability of the prosthesis, and can endow the bonding interface with an antibacterial function through the cationic quaternary ammonium group, thereby effectively avoiding secondary caries and obviously improving the long-term treatment effect of bonding repair. The methacrylate-modified organosilicon quaternary ammonium salt comprises the following structure shown in the specification.
Agricultural chemical composition comprising quaternary ammonium enhancers
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, (2008/06/13)
A method for enhancing an efficacy of an agricultural chemical which comprises incorporating a quaternary ammonium enhancer into a diluted solution of the agricultural chemical.
Integrated approach to surfactant environmental safety assessment: Fast atom bombardment mass spectrometry and liquid scintillation counting to determine the mechanism and kinetics of surfactant biodegradation
Simms,Woods,Walley,Keough,Schwab,Larson
, p. 2951 - 2957 (2007/10/02)
Fast atom bombardment man spectrometry and liquid scintillation counting have been used to study the biodegradation of a novel cationic surfactant In live sludge. The rates of primary biodegradation and the extent of complete miner allzation were determined. Furthermore, an Intermediate degradation product was Identified and Its rates of formation and subsequent removal have been established. These data find utility In assessing the environmental safety of the surfactant and the accuracy of various environmental fate models.
Chemical Differentiation of Bilayer Surfaces in Functional Dialkylammonium Ion Vesicles: Observation of Surfactant Flip-Flop
Moss, Robert A.,Bhattacharya, Santanu,Chatterjee, Swati
, p. 3680 - 3687 (2007/10/02)
Cationic p-nitrophenyl carbonate and p-nitrophenyl benzoate functionalized di-n-octadecylmethylammonium ion surfactants 6 and 7 were synthesized.Vesicles of 6 or covesicles of (1:9) 7 and 5, created at pH 3.9, gave rapid, partial p-nitrophenylate cleavage at pH 7.9-8.0 (from 6) or rapid, partial benzoate cleavage by external thiolate ions at pH 7.9-8.0 (from 7), attributed to surface-specific exovesicular reactions of 6 or 7/5.These exovesicular cleavages at pH 8 and 25 deg C are apparently faster than reagent permeation across the bilayers to the endovesicularfunctional groups at pH 3.9.The dioctadecylammonium ion vesicles, in contradistinction to their dihexadecyl analogues, are able to maintain the indicated pH gradient long enough at 25 deg C to permit the surface-specific esterolyses.Relaxation of the pH gradient and endovesicular cleavages follow upon enhancement of the fluidity of the vesicle bilayers either with the application of heat or with additives such as 1-hexanol or dioctyldimethylammonium chloride.In the surface-differentiated 7/5 covesicles, "flip-flop" of intact 7 from endovesicular to exovesicular sites can be promoted and visualized by experiments that involve incubation of the vesicles at 38-40 deg C, pH 3.9, for 1-12 min.
