Magnetic and micellar effects on photoreactions. 1. Carbon-13 isotopic enrichment of dibenzyl ketone via photolysis in aqueous detergent solution

1981 ◽  
Vol 103 (13) ◽  
pp. 3886-3891 ◽  
Author(s):  
Nicholas J. Turro ◽  
Ming-Fea Chow ◽  
Chao-Jen Chung ◽  
Bernhard Kraeutler
Keyword(s):  
Detergent Solution ◽  
Isotopic Enrichment ◽  
Micellar Effects ◽  
Aqueous Detergent ◽  
Aqueous Detergent Solution

scholarly journals Spontaneous emulsification of pure xylene in an aqueous solution through mere adsorption of a detergent in the interface

1949 ◽  
Vol 198 (1055) ◽  
pp. 447-454 ◽  
Keyword(s):  
Aqueous Solution ◽  
Interfacial Tension ◽  
Pure Liquid ◽  
Detergent Solution ◽  
Liquid Hydrocarbons ◽  
Spontaneous Emulsification ◽  
Pure Solvent ◽  
Dodecylamine Hydrochloride ◽  
Spherical Droplets ◽  
Aqueous Detergent

Spontaneous emulsification of a pure liquid can occur. This is demonstrated when liquid hydrocarbons are quietly placed upon the surface of the solution of a suitable detergent. Here special attention has been given to xylene placed upon moderately dilute solutions of dodecylamine hydrochloride. In many cases violent disruption of the pure liquid occurs, when it is quietly placed upon a soap or detergent solution. Examination shows that the emulsitied droplets still consist of pure solvent stabilized by a coating of adsorbed protective colloid. The source of the required energy is the energy of adsorption, as well as solubilization of hydrocarbon in the aqueous detergent. The emulsion formed consists of spherical droplets which therefore retain a positive interfacial tension.

Enzymatic colorimetry of lecithin and sphingomyelin in aqueous solution.

1983 ◽  
Vol 29 (8) ◽  
pp. 1513-1517 ◽  
Author(s):  
M W McGowan ◽  
J D Artiss ◽  
B Zak
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Amniotic Fluid ◽  
Enzymatic Reaction ◽  
Detergent Solution ◽  
Enzymatic Determination ◽  
Red Color ◽  
Hydrolysis Of ◽  
Zwitterionic Detergent

Abstract A procedure for the enzymatic determination of lecithin and sphingomyelin in aqueous solution is described. The phospholipids are first dissolved in chloroform:methanol (2:1 by vol), the solvent is evaporated, and the residue is redissolved in an aqueous zwitterionic detergent solution. The enzymatic reaction sequences of both assays involve hydrolysis of the phospholipids to produce choline, which is then oxidized to betaine, thus generating hydrogen peroxide. The hydrogen peroxide is subsequently utilized in the enzymatic coupling of 4-aminoantipyrine and sodium 2-hydroxy-3,5-dichlorobenzenesulfonate, an intensely red color being formed. The presence of a non-reacting phospholipid enhances the hydrolysis of the reacting phospholipid. Thus we added lecithin to the sphingomyelin standards and sphingomyelin to the lecithin standards. This precise procedure may be applicable to determination of lecithin and sphingomyelin in amniotic fluid.

Micellar effects on the reactivity of the hydrated electron with benzene

1970 ◽  
Vol 74 (26) ◽  
pp. 4608-4609 ◽  
Author(s):  
Larry K. Patterson ◽  
Janos H. Fendler
Keyword(s):  
Hydrated Electron ◽  
Micellar Effects

scholarly journals Dispersion of Carbon Nanotubes with “Green” Detergents

Molecules ◽  
2021 ◽  
Vol 26 (10) ◽  
pp. 2908
Author(s):  
Kazuo Umemura ◽  
Ryo Hamano ◽  
Hiroaki Komatsu ◽  
Takashi Ikuno ◽  
Eko Siswoyo
Keyword(s):  
Carbon Nanotubes ◽  
Sodium Dodecyl ◽  
Detergent Solution ◽  
Absorbance Spectroscopy ◽  
Fundamental Research ◽  
The Stability ◽  
Single Walled Cnts ◽  
Better Than ◽  
Walled Cnts ◽  
Cnt Suspensions

Solubilization of carbon nanotubes (CNTs) is a fundamental technique for the use of CNTs and their conjugates as nanodevices and nanobiodevices. In this work, we demonstrate the preparation of CNT suspensions with “green” detergents made from coconuts and bamboo as fundamental research in CNT nanotechnology. Single-walled CNTs (SWNTs) with a few carboxylic acid groups (3–5%) and pristine multi-walled CNTs (MWNTs) were mixed in each detergent solution and sonicated with a bath-type sonicator. The prepared suspensions were characterized using absorbance spectroscopy, scanning electron microscopy, and Raman spectroscopy. Among the eight combinations of CNTs and detergents (two types of CNTs and four detergents, including sodium dodecyl sulfate (SDS) as the standard), SWNTs/MWNTs were well dispersed in all combinations except the combination of the MWNTs and the bamboo detergent. The stability of the suspensions prepared with coconut detergents was better than that prepared with SDS. Because the efficiency of the bamboo detergents against the MWNTs differed significantly from that against the SWNTs, the natural detergent might be useful for separating CNTs. Our results revealed that the use of the “green” detergents had the advantage of dispersing CNTs as well as SDS.

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