Stereochemical aspects of micellar properties of esterified glucoside surfactants in water: apparent molar volume, adiabatic compressibility, and aggregation number

2000 ◽  
Vol 278 (6) ◽  
pp. 576-580 ◽  
Author(s):  
K. Fukada ◽  
M. Kawasaki ◽  
T. Seimiya ◽  
Y. Abe ◽  
M. Fujiwara ◽  
...  
Keyword(s):  
Molar Volume ◽  
Apparent Molar Volume ◽  
Aggregation Number ◽  
Adiabatic Compressibility ◽  
Micellar Properties

Molecular Interactions Investigation of L-Histidine in Water and in Aqueous Citric Acid at Different Temperatures Using Volumetric and Acoustic Methods

2018 ◽  
Vol 232 (3) ◽  
pp. 393-408 ◽  
Author(s):  
Dinesh Kumar ◽  
Shashi Kant Sharma
Keyword(s):  
Citric Acid ◽  
Molar Volume ◽  
Atmospheric Pressure ◽  
Apparent Molar Volume ◽  
Adiabatic Compressibility ◽  
Acid Solutions ◽  
Solvent Interactions ◽  
Intermolecular Free Length ◽  
Acoustic Methods ◽  
Different Temperatures

AbstractDensities,ρand ultrasonic speeds, u of L-histidine (0.02–0.12 mol·kg−1) in water and 0.1 mol·kg−1aqueous citric acid solutions were measured over the temperature range (298.15–313.15) K with interval of 5 K at atmospheric pressure. From these experimental data apparent molar volume ΦV, limiting apparent molar volume ΦVOand the slopeSV, partial molar expansibilities ΦEO, Hepler’s constant, adiabatic compressibilityβ, transfer volume ΦV, trO, intermolecular free length (Lf), specific acoustic impedance (Z) and molar compressibility (W) were calculated. The results are interpreted in terms of solute–solute and solute–solvent interactions in these systems. It has also been observed that L-histidine act as structure maker in water and aqueous citric acid.

scholarly journals Volumetric and Ultrasonic Velocity Studies of Urea and Thiourea in Aqueous Solution

2018 ◽  
Vol 34 (4) ◽  
pp. 1755-1764 ◽  
Author(s):  
Roksana Khatun ◽  
Rajia Sultana ◽  
Ranjit K. Nath
Keyword(s):  
Molar Volume ◽  
Sound Velocity ◽  
Apparent Molar Volume ◽  
Hydration Number ◽  
Adiabatic Compressibility ◽  
Anomalous Behavior ◽  
Ultrasonic Sound ◽  
Apparent Molar Adiabatic Compressibility ◽  
Solute Interactions ◽  
Molar Expansibility

The observations on the anomalous behavior of urea and the comparison between urea and thiourea in aqueous solutions have been examined by volumetric and ultrasonic sound velocity techniques at different temperature (298.15, 303.15, 308.15, 313.15, 318.15 and 323.15 K) , atmospheric pressure by using a high accuracy vibrating U-tube digital density and ultrasonic sound velocity analyzer. The apparent molar volume (ϕv) & apparent molar adiabatic compressibility (ϕk) have been calculated from experimental density and ultrasonic sound velocity data respectively and limiting apparent molar volume (ϕv0), limiting apparent molar adiabatic compressibility (ϕk0) have been evaluated from apparent molar volume vs. molality plot as intercept. Apparent molar expansibility (ϕE) was determined from apparent molar volume and hydration number (nH) from adiabatic compressibility. The results show very interesting information about strong solute-solvent & solute-solute interactions, and also elaborate the structure making or breaking behavior in the solution mixtures.

scholarly journals Acoustical Behaviour of Sodium Nitroprusside in Aquo-Organic Solvent Media at 308.15 K

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Monalisa Das ◽  
Smrutiprava Das ◽  
A. K. Pattanaik
Keyword(s):  
Sodium Nitroprusside ◽  
Molar Volume ◽  
Ultrasonic Velocity ◽  
Apparent Molar Volume ◽  
Adiabatic Compressibility ◽  
Quantitative Relationship ◽  
Solvent Mixture ◽  
Acoustical Properties ◽  
Organic Solvent Media ◽  
Apparent Molar Compressibility

Density and ultrasonic velocity have been measured for sodium nitroprusside in aqueous solutions of CH3OH, ethylene glycol, DMSO, and n-propanol solvents at 308.15 K. A quantitative relationship has been established among the acoustical properties like ultrasonic velocity (U), adiabatic compressibility (β), intermolecular free length (Lf), acoustic impedance (Z), apparent molar compressibility (Kϕ), apparent molar volume (Vϕ), limiting apparent molar compressibility (Kϕ0) limiting apparent molar volume (Vϕ0), and their constants (SK,Sv). From the obtained values, molecular interaction study has been made successfully in the light of these acoustical properties through hydrogen bonding in solute and solvent mixture.

scholarly journals A Comparative Study on the Effect of Temperature and Concentration on Density, Sound Velocity and their Derived Properties for Diclofenac Potassium in Aqueous Urea Media

2020 ◽  
Vol 10 (5) ◽  
pp. 6377-6388
Keyword(s):  
Molar Volume ◽  
Apparent Molar Volume ◽  
Coefficient Of Thermal Expansion ◽  
Adiabatic Compressibility ◽  
Isentropic Compressibility ◽  
Effect Of Temperature ◽  
Physico Chemical ◽  
Aqueous Urea ◽  
Derived Properties ◽  
Molar Expansibility

The present study has undertaken experimental measurements of ultrasonic velocity (U) and density (d) of solutions of Diclofenac potassium in water and in aqueous urea media of different molar concentrations. Computation of physico-chemical parameters like apparent molar volume (V_Φ), limiting apparent molar volume (V_Φ^0 ), apparent molar expansibility (E_Φ), limiting apparent molar expansibility (E_Φ^0 ), molar isentropic compressibility (K_s), apparent molar isentropic compressibility(K_(s,ɸ) ),molar adiabatic compressibility (W), molar isothermal compressibility (K_T), acoustic impedance (Z), free volume (V_f ), internal pressure (π_i), relative association (R_A), coefficient of thermal expansion (α) and van der Waals constant (b) was done by using the experimentally obtained values. The influence of varying concentrations of Diclofenac potassium as well as of urea in solutions and the variation of the investigating temperatures on the above mentioned parameters are expected to reveal the nature of different molecular interactions existing in the drug solutions.

scholarly journals Molecular Interactions and Aggregation Behavior of Cloxacillin Sodium in Water and Aqueous NaCl Solutions through Volumetric and Ultrasonic Sound Velocity Studies at 298.15 KMolecular Interactions and Aggregation Behavior of Cloxacillin Sodium in Water and Aqueous NaCl Solutions through Volumetric and Ultrasonic Sound Velocity Studies at 298.15 K

2020 ◽  
Vol 36 (05) ◽  
pp. 863-870
Author(s):  
Roksana Khatun ◽  
Md. Monirul Islam ◽  
Md. Din Islam
Keyword(s):  
Molar Volume ◽  
Sound Velocity ◽  
Molecular Interactions ◽  
Atmospheric Pressure ◽  
Apparent Molar Volume ◽  
Adiabatic Compressibility ◽  
Aggregation Behavior ◽  
Aqueous Environment ◽  
Ultrasonic Sound ◽  
Apparent Molar Adiabatic Compressibility

Molecular interactions and aggregation behavior of cloxacillin sodium (CloNa) in water and aqueous NaCl solutions was studied through volumetric and ultrasonic sound velocity method at 298.15 K and atmospheric pressure. Density, ρ, and ultrasonic sound velocity, u, of cloxacillin sodium in water and aqueous NaCl solutions were measured with a digital density and ultrasonic sound velocity analyzer (DSA 5000, Anton Paar, Austria). And from the investigational data, apparent molar volume, ϕn, adiabatic compressibility, ϕS, apparent molar adiabatic compressibility, ϕk, limiting apparent molar volume, ϕn0, limiting apparent molar adiabatic compressibility, ϕk0, and aggregation concentration, CMC of cloxacillin sodium was calculated. The outcomes indication exhibits very significant evidence about the interactions among solute-solvent-co-solute (solute-solute, solute-solvent) and aggregation behavior in the aqueous environment and this result would be useful for the drug action in human body with pharmacological applications.

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