Study of the sensitization of tetradecyl benzyl dimethyl ammonium chloride for the color development reaction between lysine and sodium 1,2-naphthoquinone-4-sulfonate and the determination of lysine in pharmaceutical and biological samples

2007 ◽  
Vol 67 (2) ◽  
pp. 360-367 ◽  
Author(s):  
Quanmin Li ◽  
Tiantian Zhang
Keyword(s):  
Ammonium Chloride ◽  
Biological Samples ◽  
Color Development ◽  
Dimethyl Ammonium Chloride ◽  
Dimethyl Ammonium

scholarly journals New indicator reaction for kinetic determination of micro amounts of Sn(II)

2001 ◽  
Vol 66 (9) ◽  
pp. 631-636
Author(s):  
Rangel Igov ◽  
Violeta Mitic ◽  
Todor Pecev ◽  
Vesna Stankov-Jovanovic
Keyword(s):  
Kinetic Equation ◽  
Ammonium Chloride ◽  
Crystal Violet ◽  
Reaction Rate ◽  
Kinetic Determination ◽  
Inhibiting Effect ◽  
Dimethyl Ammonium Chloride ◽  
Concentration Interval ◽  
Dimethyl Ammonium

A new reaction is suggested and a new method is elaborated for determination of micro amounts of Sn(II) based on its inhibiting effect on the oxidation of {4-bis[n-(dimethylamino) phenyl]methylene-2,5-cyclohexadiene-1-ilydene}dimethyl-ammonium chloride (crystal violet CV) by H2O2. The method sensibility is 0.4 ?g/cm3. The probable relative error is 2.8-12.8 % for Sn(II) in the concentration interval of 3 to 0.8 ?g/cm3. The kinetic equation for this process is given. The influence of some other ions on the reaction rate was tested. The method was applied to the determination of Sn(II) in a sample of microalloy.

scholarly journals Microbicidal Dispersions and Coatings from Hybrid Nanoparticles of Poly (Methyl Methacrylate), Poly (Diallyl Dimethyl Ammonium) Chloride, Lipids, and Surfactants

2019 ◽  
Vol 20 (24) ◽  
pp. 6150 ◽  
Author(s):  
Rodrigo Tadeu Ribeiro ◽  
Carolina Nascimento Galvão ◽  
Yunys Pérez Betancourt ◽  
Beatriz Ideriha Mathiazzi ◽  
Ana Maria Carmona-Ribeiro
Keyword(s):  
Antimicrobial Activity ◽  
Methyl Methacrylate ◽  
Ammonium Chloride ◽  
Silicon Wafers ◽  
Ammonium Bromide ◽  
Microbicidal Activity ◽  
Dimethyl Ammonium Chloride ◽  
Dimethyl Ammonium ◽  
Diallyl Dimethyl Ammonium Chloride

Hybrid and antimicrobial nanoparticles (NPs) of poly (methyl methacrylate) (PMMA) in the presence of poly (diallyl dimethyl ammonium) chloride (PDDA) were previously obtained by emulsion polymerization in absence of surfactant with low conversion. In the presence of amphiphiles such as cetyl trimethyl ammonium bromide (CTAB), dioctadecyl dimethyl ammonium bromide (DODAB) or soybean lecithin, we found that conversion increased substantially. In this work, the effect of the amphiphiles on the NPs core-shell structure and on the antimicrobial activity of the NPs was evaluated. NPs dispersions casted on silicon wafers, glass coverslips or polystyrene substrates were also used to obtain antimicrobial coatings. Methods for characterizing the dispersions and coatings were based on scanning electron microscopy, dynamic light scattering, determination of thickness, rugosity, and wettability for the coatings and determination of colony-forming unities (log CFU/mL) of microbia after 1 h interaction with the coatings or dispersions. The amphiphiles used during PMMA/PDDA/amphiphile NPs synthesis reduced the thickness of the NPs PDDA shell surrounding each particle. The antimicrobial activity of the dispersions and coatings were due to PDDA—the amphiphiles were either washed out by dialysis or remained in the PMMA polymeric core of the NPs. The most active NPs and coatings were those of PMMA/PDDA/CTAB—the corresponding coatings showed the highest rugosity and total surface area to interact with the microbes. The dispersions and coatings obtained by casting of the NPs dispersions onto silicon wafers were hydrophilic and exhibited microbicidal activity against Escherichia coli, Staphylococcus aureus, and Candida albicans. In addition, a major effect of reduction in particle size revealed the suitability of nanometric and cationic NPs (sizes below 100 nm) represented by PMMA/PDDA/CTAB NPs to yield maximal microbicidal activity from films and dispersions against all microbia tested. The reduction of cell viability by coatings and dispersions amounted to 6–8 logs from [PDDA] ≥ minimal microbicidal concentration.

Enhanced water oxidation of CoP/CNTs via interfacial charge transfer induced by poly dimethyl diallyl ammonium chloride

2020 ◽  
Vol 44 (47) ◽  
pp. 20520-20524
Author(s):  
Yuxue Dai ◽  
Peng Gao ◽  
Xueying Wang ◽  
Pengfei Wang ◽  
Dandan Gao ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Charge Transfer ◽  
Ammonium Chloride ◽  
Alkaline Solution ◽  
Water Oxidation ◽  
Functionalized Carbon Nanotubes ◽  
Dimethyl Ammonium Chloride ◽  
Dimethyl Ammonium ◽  
Interfacial Charge ◽  
Diallyl Dimethyl Ammonium Chloride

CoP layer was successfully deposited onto poly(diallyl dimethyl ammonium chloride) (PDDA) functionalized carbon nanotubes (CoP/PDDA@CNTs) as high effective OER electrocatalysts in alkaline solution.

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