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 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.

Interactions of Drug Doxycycline Hyclate with Galactitol in Aqueous Solutions at Different Temperatures by Volumetric and Acoustic Methods

2020 ◽  
Vol 234 (11-12) ◽  
pp. 1853-1874
Author(s):  
Shashi Kant Lomesh ◽  
Vikas Nathan ◽  
Madhu Bala ◽  
Inesh Kumar
Keyword(s):  
Molar Volume ◽  
Apparent Molar Volume ◽  
Isentropic Compressibility ◽  
Doxycycline Hyclate ◽  
Isentropic Compression ◽  
Acoustic Methods ◽  
Different Temperatures ◽  
Volume Of Transfer ◽  
Experimental Values ◽  
Molar Expansibility

AbstractThe experimental values of density, ρ and speed of sound, u of doxycycline hyclate drug (0.002–0.014) mol kg−1 in water and (0.1, 0.2 and 0.4) mol kg−1 of aqueous galactitol solutions at temperatures T = (303.15, 308.15 and 313.15) K and at atmospheric pressure have been reported in the present communication. From the experimental values, various derived parameters such as apparent molar volume (ΦV), apparent molar isentropic compression (ΦK), limiting apparent molar volume ($\phi_{\text{v}}^{\text{o}}$), limiting apparent molar isentropic compression ($\phi_{\text{K}}^{\text{o}}$), limiting apparent molar volume of transfer (Δ$\phi_{\text{V}}^{\text{O}}$), limiting apparent molar isentropic compression of transfer (Δ$\phi_{\text{K}}^{\text{O}}$), limiting apparent molar expansibility ($\phi_{\text{E}}^{\text{o}}$), thermal expansion coefficient (α) and acoustic parameters like isentropic compressibility $({{\kappa}_{\text{S}}})$, intermolecular free length (Lf), and specific acoustic impedance (Z) were calculated. The structure-making behaviour of DH in aqueous galactitol solution was determined on the basis of Hepler’s Equation i.e. on the basis of sign of ${\left({\frac{{{{\text{d}}^{2}}\phi_{\text{V}}^{\text{O}}}}{{{\text{d}}{{\text{T}}^{2}}}}}\right)_{\text{P}}}$. The various derived parameters were utilised to interpret the molecular interactions i.e. solute–solute and solute–solvent existing in the studied system.

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.

Characterizaton and Volumetric Studies of Magnetite (Fe3O4) Nanofluids at Different Temperatures

2015 ◽  
Vol 37 ◽  
pp. 28-35 ◽  
Author(s):  
Muhammad Asghar Jamal ◽  
Ammar Bin Yousaf ◽  
Muhammad Kaleem Khosa ◽  
Muhammad Usman ◽  
Majid Khan
Keyword(s):  
Particle Size ◽  
Molar Volume ◽  
Atmospheric Pressure ◽  
Apparent Molar Volume ◽  
Isentropic Compressibility ◽  
Size Difference ◽  
Volumetric Properties ◽  
Practical Applications ◽  
Different Temperatures ◽  
Uv Visible

Magnetite nanofluid has been prepared in citric acid based medium. Their stability and polydispersity level have been characterized by UV-visible spectrophotometry.The volumetric properties such as apparent molar volume, partial molar volume and isentropic compressibility of nanofluid have been measured at temperature range from 298.15K to 313.15K at atmospheric pressure. The obtained results were interpreted in terms of particle-particle and particle-fluid interactions, and compared with commercially available magnetite nanofluid in terms of particle size difference. It was observed that the influence of particle size on measured volumetric parameters is significant for any practical applications of fluid flow. The differences in measured quantities were determined qualitatively by considering the state of aggregation / particle size distribution of the nanofluids.

scholarly journals Study of Molecular Interaction for Antibiotic Drug with Sugar Solutions at Different Temperature

2020 ◽  
Vol 10 (01) ◽  
pp. 170-174 ◽  
Author(s):  
Sundus H. Merza ◽  
Nagham H. Abood ◽  
Ahamed M. Abbas
Keyword(s):  
Aqueous Solutions ◽  
Molar Volume ◽  
Atmospheric Pressure ◽  
Apparent Molar Volume ◽  
Viscosity Data ◽  
Free Energy Of Activation ◽  
Ternary Solutions ◽  
Antibiotic Drug ◽  
Solute Interactions ◽  
Molar Expansibility

The interactions of drug amoxicillin with maltose or galactose solutions with a variation of temperature have been discussed by taking in the volumetric and viscometric procedures. Physical properties [densities (ρ) and viscosities (η)] of amoxicillin (AMOX) aqueous solutions and aqueous solutions of two type saccharides (maltose and galactose 0.05m) have been measured at T = (298.15, 303.15 and 308.15) K under atmospheric pressure. The apparent molar volume (ϕv cm3mole-1) has been evaluated from density data and fitted to a Redlich-Mayer equation. The empirical parameters of the Mayer-Redlich equation and apparent molar volume at infinite dilution Ø°v were explicated in terms of interactions from type solute-solvent and solute–solute interactions. Transfer molar volume ΔtraØ°v for AMOX from water to aqueous maltose and galactose solutions were calculated to comprehend different interactions in the ternary solutions. Limiting apparent molar expansibility (Ø°E) and Hepler’s coefficient was also calculated to indicate the structure making ability of AMOX in the ternary solutions. Jones–Dole coefficient B and A have been calculated from viscosity data by employing the Jones–Dole equation. The free energy of activation of viscous flow per mole of the solute (Δμ°2*) and solvent (Δμ°1*) have been explained on the basis of the Eyring and Feakins equation.

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