Mean aggregation number and water vapor pressure of AOT reverse micellar systems determined by controlled partial pressure-vapor pressure osmometry (CPP-VPO)

Langmuir ◽  
1988 ◽  
Vol 4 (3) ◽  
pp. 653-655 ◽  
Author(s):  
M. Ueda ◽  
Z. A. Schelly
Keyword(s):  
Water Vapor ◽  
Vapor Pressure ◽  
Partial Pressure ◽  
Aggregation Number ◽  
Water Vapor Pressure ◽  
Vapor Pressure Osmometry ◽  
Micellar Systems ◽  
Reverse Micellar Systems ◽  
Reverse Micellar

Humidity-Dependent Cold Cells on the Antenna of the Stick Insect

2007 ◽  
Vol 97 (6) ◽  
pp. 3851-3858 ◽  
Author(s):  
Harald Tichy
Keyword(s):  
Water Vapor ◽  
Vapor Pressure ◽  
Partial Pressure ◽  
Systematic Study ◽  
Water Vapor Pressure ◽  
Ambient Air ◽  
Stick Insect ◽  
Proper Choice ◽  
Impulse Frequency ◽  
Order Of Magnitude

We present the first systematic study of the response of insect “cold cells” to a variation in the partial pressure of water vapor in ambient air. The cold cells on the antenna of the stick insect respond with an increase in activity when either the temperature or the partial pressure of water vapor is suddenly reduced. This double dependency does not in itself constitute bimodality because it could disappear with the proper choice of parameters involving temperature and humidity. In this study, we demonstrate that the evaporation of a small amount of water from the sensillum surface resulting from a drop in the water vapor pressure—leading to a transient drop in temperature and thus to a brief rise in impulse frequency—is the most plausible explanation for this bimodal response. We also show with an order-of-magnitude calculation that this mechanism is plausible and consistent with the amounts of water vapor potentially present on the sensillum. We hypothesize that a film of moisture collects on the hygroscopic sensillum surface at higher humidity and then tends to evaporate when humidity is lowered. The water might even be bound loosely within the cuticular wall, a situation conceivable in a sensillum that contains two hygroreceptive cells in addition to the cold cell.

scholarly journals AN OVERWIEW AND ANALYSIS OF DEPENDECIES FOR DETERMINING THE SATURATION PRESSURE OF WATER VAPORS

2019 ◽  
Vol 7 (4) ◽  
pp. 300-306
Author(s):  
Petko Tsankov ◽  
Ivan Binev
Keyword(s):  
Water Vapor ◽  
Vapor Pressure ◽  
Partial Pressure ◽  
Water Vapor Pressure ◽  
Saturation Pressure ◽  
Saturated Water Vapor ◽  
Important Indicator ◽  
Saturated Water ◽  
Water Vapors ◽  
Water Vapor Saturation Pressure

This paper reviews, describes and analyzes the accuracy of 24 dependencies for determining the partial pressure of saturated water vapor. An important indicator of this process is the partial pressure of water vapor in the air, and its maximum value is called saturated water vapor pressure or water vapor saturation pressure, or partial saturated water vapor pressure. The assessment is made against the accepted dependency of Hardy-Wexler. Conclusions and recommendations for simple and highly accurate dependencies ps = f(t) were made.

Hydrotrope induced structural modifications in CTAB/butanol/water/isooctane reverse micellar systems

2017 ◽  
Vol 19 (33) ◽  
pp. 22033-22048 ◽  
Author(s):  
Vaishali Sethi ◽  
Jayanti Mishra ◽  
Arpan Bhattacharyya ◽  
Debasis Sen ◽  
Ashok K. Ganguli
Keyword(s):  
Nmr Studies ◽  
Structural Alterations ◽  
Structural Modifications ◽  
Micellar Systems ◽  
Reverse Micellar Systems ◽  
Reverse Micellar

SAXS and NMR studies to gain insight of structural alterations in reverse micellar nanotemplates in presence of hydrotropes.

Lipase-catalyzed esterification of fatty acid in DMSO (dimethyl sulfoxide) modified AOT reverse micellar systems

2007 ◽  
Vol 25 (1) ◽  
pp. 51-58 ◽  
Author(s):  
Muhammad Moniruzzaman ◽  
Yoshishige Hayashi ◽  
Mahabubur R. Talukder ◽  
Takuya Kawanishi
Keyword(s):  
Fatty Acid ◽  
Dimethyl Sulfoxide ◽  
Micellar Systems ◽  
Reverse Micellar Systems ◽  
Reverse Micellar
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