Osmotic stress measurements of dihexadecyldimethylammonium acetate bilayers as a function of temperature and added salt

Langmuir ◽  
1993 ◽  
Vol 9 (1) ◽  
pp. 233-241 ◽  
Author(s):  
Yi Hua Tsao ◽  
D. Fennell Evans ◽  
R. P. Rand ◽  
V. A. Parsegian
Keyword(s):  
Osmotic Stress ◽  
Stress Measurements ◽  
Added Salt

Lateral Stresses in Membranes at Low Water Potential

1987 ◽  
Vol 14 (3) ◽  
pp. 311 ◽  
Author(s):  
J Wolfe
Keyword(s):  
Osmotic Stress ◽  
Water Potential ◽  
Cell Membranes ◽  
Cellular Damage ◽  
Biological Cells ◽  
Severe Dehydration ◽  
Stress Strain ◽  
Stress Measurements ◽  
Different Levels ◽  
Water Contents

Severe dehydration of biological cells can produce large stresses and substantial strains in the membranes of some organelles. Water contents and water potentials which are critical for cellular damage in rather dry tissues may reflect a limiting stress characteristic of cell membranes. Different levels of tolerance of extreme dehydration may therefore be a result of different cellular osmotic pressures or of different stress-strain characteristics of the cellular membranes. In this paper, data from phospholipid osmotic stress measurements are used to model the stresses generated in membranes in dehydrated phases.

Residual stress measurements and modeling of built-up Box-T sections

2021 ◽  
Vol 160 ◽  
pp. 107336
Author(s):  
Ziqian Zhang ◽  
Gang Shi ◽  
Xuesen Chen ◽  
Lijun Wang ◽  
Le Zhou
Keyword(s):  
Residual Stress ◽  
Stress Measurements

Surfactant Impurities Can Explain the Jones-Ray Effect

2018 ◽  
Author(s):  
Timothy Duignan ◽  
Marcel Baer ◽  
Christopher Mundy
Keyword(s):  
Surface Tension ◽  
Electrostatic Potential ◽  
Driving Forces ◽  
Salt Water ◽  
Fundamental Property ◽  
Apparent Contradiction ◽  
Low Salt ◽  
Air Water Interface ◽  
Added Salt ◽  
Effect Of Surface

<div> <p> </p><div> <div> <div> <p>The surface tension of dilute salt water is a fundamental property that is crucial to understanding the complexity of many aqueous phase processes. Small ions are known to be repelled from the air-water surface leading to an increase in the surface tension in accordance with the Gibbs adsorption isotherm. The Jones-Ray effect refers to the observation that at extremely low salt concentration the surface tension decreases in apparent contradiction with thermodynamics. Determining the mechanism that is responsible for this Jones-Ray effect is important for theoretically predicting the distribution of ions near surfaces. Here we show that this surface tension decrease can be explained by surfactant impurities in water that create a substantial negative electrostatic potential at the air-water interface. This potential strongly attracts positive cations in water to the interface lowering the surface tension and thus explaining the signature of the Jones-Ray effect. At higher salt concentrations, this electrostatic potential is screened by the added salt reducing the magnitude of this effect. The effect of surface curvature on this behavior is also examined and the implications for unexplained bubble phenomena is discussed. This work suggests that the purity standards for water may be inadequate and that the interactions between ions with background impurities are important to incorporate into our understanding of the driving forces that give rise to the speciation of ions at interfaces. </p> </div> </div> </div> </div>

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