Browsing by Subject "Colloid and Surface Chemistry"
Now showing items 1-20 of 21
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(1988)Fluorescence techniques are used to study the effect of size on the properties of dioctadecyldimethylammonium chloride vesicles. The solubilization site and the deactivation rates of excited pyrene by bromide counterions ...
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(1987)A new, rapid, and simple method for preparing long-chain alkyltrimethylammonium (A1TA+X-) or long-chain alkylpyridinium (A1Py+X-) salts (X- = F-, Cl-, Br-, NO3-, SO42-, PO42-, car{ballot box}ylic anions, etc.) is presented. ...
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(1974)The absorbances in the uv region of sodium p-toluene sulfonate, sodium toluate, sodium benzene sulfonate and sodium phenyl phosphate have been measured in the presence of increasing amounts of cetyl trimethyl ammonium ...
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(1988)A study of the adsorption and thermodynamic functions of sulfur dioxide on Aerosil has been made, leading to some conclusions about the mobility of the SO2 molecule. The differential and integral enthalpies and entropies ...
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Aromatic nucleophilic substitution in nucleophilic surfactants. Comparison with alkoxide reactions (1976)The reactions of 2,4-dinitrochloro- and fluorobenzene (DNC and DNF) with the alkoxide ions of choline, propargyl alcohol, and 2,2,2-trifluoroethanol give ether intermediates which react readily with hydroxide ion. The ...
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(1995)Association constants of alkylpyridine bromide, CnPyB, (methyl, ethyl, propyl, and butyl) to dodecylsulfate micelles has been determined by two methods, ultrafiltration and fluorescence spectroscopy. In the last, the ...
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(1992)The solubility behavior in water of different salts of cetyltrimethyl ammonium (CTA+), such as iodide (CTAI), thiocyanate (CTASCN), and perchlorate (CTAClO4), is reported. The order of solubilities is CTASCN > CTAI > ...
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Effect of temperature on the viscosity of cationic micellar solutions in the presence of added salts (1987)The effect of temperature on the viscosities of cetyltrimethylammonium salts (CTA X, X =Br-, NO3-, Tosylate) in the presence of added salts is presented. It was found that plots of 1n of relative viscosity vs 1/T was linear ...
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(2000)Electronic substituent effects may be rationalized in terms of Hammett- like linear relationships between global energy-dependent quantities and local electronic descriptors of reactivity. These linear relationships are ...
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(1970)The adsorption of bovine serum albumin (BSA) at an air/water interface was shown to be reversible and the equilibrium adsorption isotherm measured for concentrations between 0.001% and 10.0%. The desorption of BSA into a ...
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(1986)Viscosities of micelles of cetyltrimethylammonium salts (CTAX, X = tosylate (TOS-), Cl-, Br-, NO3 -) in the presence of Cl-, Br-, NO3 -, benzene sulfonate (BS-), and TOS-, of cetylpyridinium chloride (CpyC) in the presence ...
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(1986)The interactions of neutral molecules with ionic micelles are analyzed. The cell and mass action models are presented in order to provide a semiquantitative description of the solubilization process. Both approaches are ...
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(1969)The reactions between hydroxide or fluoride ion and p-nitrophenyl diphenyl phosphate, catalyzed by micelles of cetyltrimethylammonium bromide, are inhibited by phenyl, diphenyl, and p-t-butylphenyl phosphate. With decreasing ...
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(1993)Four sodium polysoaps from poly[malcic anbydride-co-styrene] were synthesized and the surface properties of their aqueous solutions at the air-water interface were determined. The surface tension lowering was directly ...
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(1988)The kinetics of the quenching of excited pyrene by several molecules in a variety of hydrocarbon solvents and in a diol are reported. The rate constants for reaction of the excited pyrene are, for the most part, ...
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(2012)Photoisomerization of a protein bound chromophore is the basis of the light sensing and signaling responses of many photoreceptors. Z-to-E photoisomerization of the Pr Cph1Δ2 phytochrome has been investigated by polarization ...
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(American Chemical Society, 2001)Continuum solvent effect on the electrophilicity index recently proposed by Parr and co-workers (Parr, R. G.; von Szentpaly, L.; Liu, S. J. Am. Chem. Soc. 1999, 121, 1922) is discussed in detail. Solvent effect is introduced ...
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(1985)Adsorption isotherms of 1-heptene and n-heptane were determined at three near-ambient temperatures on a nonporous silica (Aerosil 200 They appear to lend support to the hypothesis that the double bond of the olefins ...
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(2003)Surface tension measurements have been made in aqueous solutions of anionic hemiesters of an alternating copolymer of maleic acid and styrene, MAS-n with n=0-12, in the presence of dodecyltrimethylammonium bromide, DTAB. ...