« Previous AbstractShade suppresses wound-induced leaf repositioning through a mechanism involving PHYTOCHROME KINASE SUBSTRATE (PKS) genes    Next AbstractPre-exposure of Arabidopsis to the abiotic or biotic environmental stimuli 'chilling' or 'insect eggs' exhibits different transcriptomic responses to herbivory »

J Colloid Interface Sci

Title:		Surface tension and adsorption kinetics of amphiphiles in aqueous solutions: the role of carbon chain length and temperature
Author(s):		Firooz A; Chen P;
Address:		"Department of Chemical Engineering, University of Waterloo, 200 University Avenue West, Waterloo, Ontario, Canada N2L 3G1"
Journal Title:		J Colloid Interface Sci
Year:		2012
Volume:		20120108
Issue:		1
Page Number:		183 - 191
DOI:		10.1016/j.jcis.2011.12.062
ISSN/ISBN:		1095-7103 (Electronic) 0021-9797 (Linking)
Abstract:		"The effects of carbon chain length and temperature were investigated on adsorption kinetics and surface tension of a group of slightly volatile, short carbon chain molecules: 1-octanol, 1-hexanol, and 1-butanol. Experiments were performed in a closed chamber where simultaneous adsorption from both sides of the vapor/liquid interface was considered. The dynamic (time dependent) and steady-state surface tensions were found to decrease with temperature ranging from 10 degrees C to 35 degrees C. It was shown that, at the final steady-state, the effect of adsorption from the vapor phase was much more important than that from the liquid phase especially for short carbon chain molecules (e.g., 1-butanol). The modified Langmuir equation of state and modified kinetic transfer equation, which account for adsorption from both sides of a vapor/liquid interface, were used to model the experimental data of the steady-state and dynamic surface tension, respectively. Modeling results showed that the equilibrium constants and adsorption rate constants were increased with temperature and carbon chain length. The maximum surface concentration showed a decrease with temperature and an increase with carbon chain length. Some variations in the fitting parameters were observed in the dynamic modeling. These variations may be due to the experimental errors or the limitations of the proposed model"
Keywords:		"1-Butanol/*chemistry 1-Octanol/*chemistry Adsorption Computer Simulation Hexanols/*chemistry Hydrophobic and Hydrophilic Interactions Kinetics *Models, Chemical Surface Tension Surface-Active Agents/*chemistry Temperature Volatile Organic Compounds/chemis;"
Notes:		"MedlineFirooz, Abdolhamid Chen, P eng Research Support, Non-U.S. Gov't 2012/01/27 J Colloid Interface Sci. 2012 Mar 15; 370(1):183-91. doi: 10.1016/j.jcis.2011.12.062. Epub 2012 Jan 8"