|别名||溴化铵 ;hydrobromic acid monoammoniate ammoniumbromide|
|个人防护设备||Eyeshields,Gloves,type N95 (US),type P1 (EN143) respirator filter|
Previous studies have shown that the alternative pathway of complement activation plays an important role in protection against infection with Cryptococcus neoformans. Cryptococcus gattii does not act...Read More
Phase-transfer-catalyzed asymmetric conjugate cyanation of alkylidenemalonates with KCN in the presence of a Br?nsted acid additive.
Highly enantioselective conjugate cyanation of alkylidenemalonates with KCN was achieved under mild phase-transfer conditions with a bifunctional phase-transfer catalyst. The effect of Br?nsted acid a...Read More
Potent melanin production enhancement of human tyrosinase gene by Tat and an entrapment in elastic cationic niosomes: potential application in vitiligo gene therapy.
Potent melanin production enhancement of human tyrosinase plasmid (pAH7/Tyr, P) in mouse melanoma cells (B(16)F(10)) by Tat peptide (T) and an entrapment in elastic cationic niosomes (E) was described...Read More
The presence of many salts, such as sodium chloride, can adversely affect the performance of native electrospray ionization mass spectrometry for the analysis of proteins and protein complexes by redu...Read More
Headgroup effects on the Krafft temperatures and self-assembly of ω-hydroxy and ω-carboxy hexadecyl quaternary ammonium bromide bolaform amphiphiles: micelles versus molecular clusters?
Eight bolaform amphiphiles were synthesised and characterised; 4 α,ω-hydroxy-alkane trialkyl (and pyridyl) ammonium bromides and 4 α,ω-carboxy-alkane trialkyl (and pyridyl) ammonium bromides where...Read More
Efficient capture of SO2 by a binary mixture of caprolactam tetrabutyl ammonium bromide ionic liquid and water.
The solubility of SO(2) in a binary mixture of water and caprolactam tetrabutyl ammonium bromide ionic liquid (CPL-TBAB IL) was investigated. Though the ionic liquid and water were fully miscible, a p...Read More
Catalytic synthesis of nonracemic azaproline derivatives by cyclization of β-alkynyl hydrazines under kinetic resolution conditions.
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The objective of this study was to use the newly synthesized poly(quaternary ammonium salt) (PQAS)-containing polyacid to formulate the light-curable glass-ionomer cements and study the effect of the ...Read More
Cinchona alkaloid-catalyzed asymmetric trifluoromethylation of alkynyl ketones with trimethylsilyl trifluoromethane.
The first catalytic enantioselective trifluoromethylation of alkynyl ketones 1 with (trifluoromethyl)trimethylsilane is disclosed by an operationally simple procedure, based on the combination of ammo...Read More
Investigation of the role of electrolytes and non-electrolytes on the cloud point and dye solubilization in antidepressant drug imipramine hydrochloride solutions
Antidepressant drug imipramine hydrochloride (IMP) is amphiphilic which shows surfactant-like behavior in aqueous solutions. We have studied the effect of adding electrolytes and non-electrolytes on t...Read More
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This study concentrates on the temperature dependence of the Raman intensities for the lattice modes in ammonium halides (NH"4Cl and NH"4Br) close to phase transitions. We predict their inte...Read More
Although simple as a concept, electrophoretic NMR (eNMR) has so far failed to find wider application. Problems encountered are mainly due to disturbing and partly irreproducible convection-like bulk f...Read More
N-doping technology is introduced to improve Co3O4's Hg0 removal ability and anion activation ability for the first time. The adsorption tests show that N-doped Co3O4 has a higher S(BET) and grea...Read More
We establish here a linear variation of the specific heat C"P with the frequency shifts (1/@n)(@?@n/@?T)"P close to the @l-phase transition in NH"4Br (T"@l=234K). This linear relat...Read More
Changes in the surfaces of adsorbed p-nitrophenol on methyltrioctadecylammonium bromide organoclay-An XRD, TG, and infrared spectroscopic study
Water purification is of extreme importance worldwide. p-Nitrophenol was used as a test chemical to design and test an organoclay for the removal of p-nitrophenol from an aqueous solution. Synthesis o...Read More
First evaluation of the thermodynamic properties for spheres to elongated micelles transition of some propanediyl-alpha,omega-bis(dimethylalkylammonium bromide) surfactants in aqueous solution.
The apparent and partial molar enthalpies, apparent molar volumes, and adiabatic compressibilities at 298 K of the aqueous solutions of the cationic gemini surfactants propanediyl-alpha,omega-bis(octy...Read More
Temperature dependence of the damping constant and the order parameter close to the lambda phase transitions in ammonium halides.
This study gives our calculation for the damping constant, using the expressions derived for an Ising pseudospin-phonon coupled system in the ammonium halides (NH(4)Cl and NH(4)Br). For this calculati...Read More
Dental plaque microcosm biofilm behavior on calcium phosphate nanocomposite with quaternary ammonium.
Half of dental restorations fail in 10 years, with secondary caries as the main reason. Calcium phosphate composites could remineralize tooth lesions. The objectives of this study were to: (1) impart ...Read More
Self-assembling systems based on amphiphilic alkyltriphenylphosphonium bromides: elucidation of the role of head group.
A systematic study of the aggregation behavior of alkyltriphenylphosphonium bromides (TPPB-n; n=8, 10, 12, 14, 16, 18; here n is the number of carbon atoms in alkyl groups) in aqueous solutions has be...Read More
Time-dependent phase behavior of 5CB-DDAB-water microemulsions monitored by means of dielectric spectroscopy.
The phase behavior of an inverse microemulsion composed of 4-cyano-4-n-pentylbiphenyl (5CB), didodecyl dimethyl ammonium bromide, and water was intensively studied recently, but controversy still rema...Read More
The effect of cationic gemini surfactants upon lipid membranes. An experimental and molecular dynamics simulation study.
Gemini surfactants possess interesting interfacial and aggregation properties that have prompted comprehensive studies and successful applications in a wide variety of fields. However, a systematic st...Read More
Spectral study of interaction between poly [acrylamide-(2-methyl acryloxyethyl) dimethyl buthylammonium bromide] and nucleic acids
A polycation, poly[acrylamide-(2-methylacryloxyethyl) dimethyl buthylammonium bromide] [P (AM-DMB)], was synthesized. The interaction between P (AM-DMB) and DNA was studied by spectral methods. Resona...Read More
Interaction of cellulase with cationic surfactants: Using surfactant membrane selective electrodes and fluorescence spectroscopy
The interaction of cationic surfactants, n-alkyl trimethyl ammonium bromides (C"nTAB, n=12 and 14), with cellulase from Aspergillus niger has been investigated at 25^oC and various pH, using C...Read More
On mixed binary surfactant systems comprising MEGA 10 and alkyltrimethylammonium bromides: A detailed physicochemical study with a critical analysis
Self-aggregation of mixed binary nonionic and ionic surfactants comprising N-methyl-N-decanoyl glucamide (MEGA 10) and alkyltrimethylammonium bromides (C"1"2-, C"1"4-, and C"1...Read More
A two-phase liquid-liquid extraction process is presented which is capable of extracting water-soluble single-walled carbon nanotubes into an organic phase. The extraction utilizes electrostatic inter...Read More