Ultrasonic velocity, density, viscosity for the ternary mixture of (benzene + chloroform + cyclohexane) at different temperatures

Vanathi, V.; Mullainathan, S.; Nithiyanatham, S.; Ramasamy, V.; Palaniappan, L.

doi:10.1016/j.heliyon.2019.e02203

Cited by 17 publications

(9 citation statements)

References 25 publications

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“…Likewise, another kind of thermodynamic property related to density and speed of sound is acoustic impedance (Z), which further explains about the solution properties and is mainly related to the propagation of the sound waves. 61 Speed of sound can be described as the measure of the forces acting between two molecules in a system, whereas acoustic impedance is the measure of the total forces, or the sound pressure generated from the vibrations occurring at a particular frequency. This property explains the intensity of the propagating wave in the ternary mixture.…”

Section: Journal Ofmentioning

confidence: 99%

Apparent Molar Properties and Viscosity Studies of Ternary Systems Composed of Model Lignin and Xylose in DBU Based Ionic Liquid–DMSO Solutions

Jisha,

Gardas

2023

J. Chem. Eng. Data

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As the world aims for sustainable energy production, biomass dissolution and conversion to value-added products using ionic liquids (ILs), with or without cosolvents, are hot topics in the current scenario. This study focuses on the analysis of volumetric, acoustic, and viscosity properties of ternary systems comprising an IL, [DBU][OTf], an aprotic solvent, namely dimethyl sulfoxide (DMSO), and model biomolecules lignin or xylose in the temperature range of 293.15−333.15 K. Here we compare the properties of the model compounds lignin and xylose, a complex polymer responsible for the rigidity of the plants and the monomer unit of hemicellulose, respectively. Ternary systems of lignin or xylose (0.005, 0.010, 0.015, 0.020, 0.025, 0.030, and 0.035 m) were prepared using the binary solutions of IL in DMSO (0.1−0.4 m) which contributes to a sum of four ternary systems with lignin (I-D-L) and another four with xylose (I-D-X) as the solute. Apparent molar properties (V ϕ and K Sϕ ) were determined with density and speed of sound measurements, and the partial molar properties were evaluated with the help of the Redlich-Mayer equation. Solute−solute, solute−solvent, and solvent−solvent interactions were explained with the empirical parameters S V and S K obtained from the fitting equation. Dynamic and kinematic viscosities were also measured to understand the flow properties of the system. Intermolecular free length (L f ), relaxation time (τ), and acoustic impedance (Z) were also determined to elucidate the intermolecular interactions prevailing in these ternary systems. The experimental values of the dynamic viscosity were fitted well with the VTF model, and the Arrhenius plots were used for the calculation of the energy requirement (E η ) for the particles to move across each other in the ternary systems. This study enhances the ternary system database containing ionic liquids and biomolecules, benefiting biomass processing design, separation processes, and theoretical modeling of complex systems.

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Section: Journal Ofmentioning

confidence: 99%

Apparent Molar Properties and Viscosity Studies of Ternary Systems Composed of Model Lignin and Xylose in DBU Based Ionic Liquid–DMSO Solutions

Jisha,

Gardas

2023

J. Chem. Eng. Data

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“…The chosen thermo acoustical parameters are calculated using the following standard relations [12][13][14][15][16] = [ ]…”

Section: Calculated Parametersmentioning

confidence: 99%

Affinity study of -lactalbumin nanoparticles in a mixed solvent environment using Laplace transform technique

Kavitha¹,

Palaniappan²

2022

Bull. Chem. Soc. Eth.

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ABSTRACT. Effect of pH and cosolvent on the stabilization of protein structure is a well established study in protein or food science. Of the various interesting applications of protein nanoparticles, making it as a drug or bioactive compound carrier is of vital importance. This application of protein nanoparticle demands the affinity priority of protein with the available components of the medium. The basis of such studies lies in the synthesis of such protein nanoparticles and their characterizations. Secondly the knowledge of priority in affinity of protein to a particular solvent is essential. On this basis, the present work deals with the ultrasonic analysis of hydophobic interactions exhibited by the α-lactalbumin nanoparticle synthesised by heat treatment using acetone as desolvating agent. In order to enrich the variations in hydrophobicity, pH and cosolvent (fructose) are included in the study. The results are compared with one of our earlier work and are interpreted in terms of the interactions existing among the components and the evolved discussions reveal that the bulk nature of the medium is controlled by the existing hydrophobicity interactions. Further, as a novel attempt, the preference of protein particle to interact with a particular solvent in mixed solvent environment is elucidated using Laplace transform technique. This approach is expected to torch light in protein science in fixing the most desirable solvent in mixed solvent environment. KEY WORDS: a-Lactalbumin, Fructose, Laplace Transform, Diffusion, Hydrophobic interactions Bull. Chem. Soc. Ethiop. 2021, 35(3), 659-668. DOI: https://dx.doi.org/10.4314/bcse.v35i3.16

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“…The chosen thermo acoustical parameters are calculated using the following standard relations (Velusamy and Palaniappan 2013;Velusamy et al 2007;Vanathi et al 2019;Ravichandran and Ramanathan 2010;Kadi et al 2006).…”

Section: Calculated Parametersmentioning

confidence: 99%

Hydrophobicity Character of A-lactalbumin Nanoparticles: An Ultrasonic Study

Kavitha¹,

Palaniappan²

2019

stj

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Effect of pH and cosolvent on the stabilization of protein structure is a well established study in protein or food science. Among the various applications of proteins, the use of protein nanoparticle as drug or bioactive compound carriers is the one which is of most interest to many diverse researchers. The synthesis of such protein nanoparticles and their characterization is of prior requirement for the realization of these drug or bioactive carriers. On this basis, the present work deals with the ultrasonic analysis of hydrophobic interactions exhibited by the a-lactalbumin nanoparticle synthesized by heat treatment using acetone as desolvating agent. In order to enrich the variations in hydrophobicity, heat or temperature and cosolvent (glucose) are included in the study. The results are interpreted in terms of the interactions existing among the components and the evolved discussions reveal the bulk nature of the medium is controlled by the existing hydrophobicity interactions. The obtained results indicate that the dependency of protein denaturation on heat and the strengthening of non- covalent interactions by the cosolvent and/or the steric exclusion effect can be attributed to the structural modifications of protein.

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Ultrasonic velocity, density, viscosity for the ternary mixture of (benzene + chloroform + cyclohexane) at different temperatures

Cited by 17 publications

References 25 publications

Apparent Molar Properties and Viscosity Studies of Ternary Systems Composed of Model Lignin and Xylose in DBU Based Ionic Liquid–DMSO Solutions

Apparent Molar Properties and Viscosity Studies of Ternary Systems Composed of Model Lignin and Xylose in DBU Based Ionic Liquid–DMSO Solutions

Affinity study of -lactalbumin nanoparticles in a mixed solvent environment using Laplace transform technique

Hydrophobicity Character of A-lactalbumin Nanoparticles: An Ultrasonic Study

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