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.

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.

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 Thermodynamic and Acoustic Study on Molecular Interactions in Certain Binary Liquid Systems Involving Ethyl Benzoate

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
B. Nagarjun ◽  
A. V. Sarma ◽  
G. V. Rama Rao ◽  
C. Rambabu
Keyword(s):  
Molar Volume ◽  
Molecular Interactions ◽  
Binary Data ◽  
Adiabatic Compressibility ◽  
Ethyl Benzoate ◽  
Strong Interactions ◽  
Free Length ◽  
Intermolecular Free Length ◽  
Dimethyl Acetamide ◽  
Liquid Systems

Speeds of sound and density for binary mixtures of ethyl benzoate (EB) with N,N-dimethylformamide (NNDMF), N,N-dimethyl acetamide (NNDMAc), and N,N-dimethylaniline (NNDMA) were measured as a function of mole fraction at temperatures 303.15, 308.15 K, 313.15 K, and 318.15 K and atmospheric pressure. From the experimental data, adiabatic compressibility (βad), intermolecular free length (Lf), and molar volume (V) have been computed. The excess values of the above parameters were also evaluated and discussed in light of molecular interactions. Deviation in adiabatic compressibilities and excess intermolecular free length (LfE) are found to be negative over the molefraction of ethyl benzoate indicating the presence of strong interactions between the molecules. The negative excess molar volume VE values are attributed to strong dipole-dipole interactions between unlike molecules in the mixtures. The binary data of Δβad, VE, and LfE were correlated as a function of molefraction by using the Redlich-Kister equation.

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