Relevant bibliographies by topics / Apparent molar volume (ϕv)

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Academic literature on the topic 'Apparent molar volume (ϕv)'

Author: Grafiati
Published: 3 June 2025
Last updated: 22 June 2025

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Journal articles on the topic "Apparent molar volume (ϕv)"

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Khatun, Roksana, Rajia Sultana, and Ranjit K. Nath. "Volumetric and Ultrasonic Velocity Studies of Urea and Thiourea in Aqueous Solution." Oriental Journal of Chemistry 34, no. 4 (2018): 1755–64. http://dx.doi.org/10.13005/ojc/340407.

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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.
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Ruiz, Rebeca, Francisco J. Hoyuelos, Ana M. Navarro, José M. Leal, and Begoña García. "Unequal effect of ethanol–water on the stability of ct-DNA, poly[(dA–dT)]2 and poly(rA)·poly(rU). Thermophysical properties." Physical Chemistry Chemical Physics 17, no. 3 (2015): 2025–33. http://dx.doi.org/10.1039/c4cp03459g.

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3

Harshawati B. Kalantri, Pravin B. Raghuwanshi, and Mrunal M. Mahajan. "STUDY OF ACOUSTICAL PARAMETERS OF SUBSTITUTED 2-AMINOBENZOTHIAZOLES IN AQUEOUS DIOXANE AT DIFFERENT TEMPERATURES." international journal of engineering technology and management sciences 7, no. 5 (2023): 487–94. http://dx.doi.org/10.46647/ijetms.2023.v07i05.060.

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In a 1,4-dioxane-water mixture at 293, 295, and 297 K, throughout a wide range of concentration, the density, viscosity, and ultrasonic velocity of synthesised Schiff base 1,3-benzothiazol-2-amine and its substituted derivatives have been examined. The current work involved the analysis of acoustical parameters such as ultrasonic velocity (V), adiabatic compressibility (βs), apparent molar volume (ϕv), and intermolecular free length (Lf), which represent structural properties.
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Merza, Sundus H., Nagham H. Abood, and Ahamed M. Abbas. "Study of Molecular Interaction for Antibiotic Drug with Sugar Solutions at Different Temperature." International Journal of Drug Delivery Technology 10, no. 01 (2020): 170–74. http://dx.doi.org/10.25258/ijddt.10.1.30.

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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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Kadam, V. V., A. B. Nikumbh, T. B. Pawar, and V. A. Adole. "Density and Viscosity of LiCl, LiBr, LiI and Kcl in Aqueous Methanol at 313.15K." Oriental Journal Of Chemistry 37, no. 5 (2021): 1083–90. http://dx.doi.org/10.13005/ojc/370510.

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The densities and viscosities of electrolytes are essential to understand many physicochemical processes that are taking place in the solution. In the present research, the densities and viscosities of lithium halides, LiX (X = Cl, Br, I ) and KCl in (0, 20, 40, 50, 60, 80 and 100) mass % of methanol + water at 313.15K were calculated employing experimental densities (ρ), the apparent molar volumes( ϕv) and limiting apparent molar volumes (0v) of the electrolytes. The (0v) of electrolyte offer insights into solute-solution interactions. In terms of the Jones-Dole equation for strong electrolyte solution, the experimental data of viscosity were explored. Viscosity coefficients A and B have been interpreted and discussed. The B-coefficient values in these systems increase with increase of methanol in the solvents mixtures. This implied that when the dielectric constant of the solvent decreases, so do the solvent-solvent interactions in these systems.
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Ali, Anwar, Nizamul Haque Ansari, Ummer Farooq, Shadma Tasneem, and Firdosa Nabi. "Study of Intermolecular Interactions of CTAB with Amino Acids at Different Temperatures: A Multi Technique Approach." Zeitschrift für Physikalische Chemie 233, no. 2 (2019): 167–82. http://dx.doi.org/10.1515/zpch-2017-1070.

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Abstract The densities, ρ, viscosities, η and specific conductivities κ, of (0.0002, 0.0004, 0.0006 and 0.0008 m) CTAB in 0.1 m aqueous valine, leucine and isoleucine were measured at different temperatures. The measured data were used to calculate various useful thermodynamic parameters. A complete characterization of any mixture can be performed by means of these thermodynamic properties. The apparent molar volume, ϕv, partial molar volume, $\phi _v^0$ and partial molar isobaric expansibilities, $\phi _E^0,$ were calculated using density data. The viscosity data were analyzed using Jones–Dole equation to obtain viscosity coefficients, A- and B-, free energy of activation per mole of solvent, Δμ1°∗, and solute, Δμ2°∗, enthalpy, ΔH∗ and entropy, ΔS∗ of activation of viscous flow. Measuring the changes in these properties has been found to be an excellent qualitative and quantitative way to obtain information regarding the molecular structure and intermolecular interactions occurring in these mixtures. Various structure-making/breaking ability of solute (cetyltrimethylammonium bromide) in presence of aqueous amino acid solutions were discussed. In addition, fluorescence study using pyrene as a photophysical probe has been carried out, the results of which support the conclusions obtained from other techniques.
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Khan, Zainab, Summyia Masood, Nighat Shafi, Rafia Azmat, Salman Khurshid, and Samreen Begum. "Interaction Studies of Chlorpheniramine Maleate in Mono and Dihydric Alcohols by Density, Viscosity, and HPLC Methods." Indonesian Journal of Chemistry 22, no. 5 (2022): 1218. http://dx.doi.org/10.22146/ijc.72225.

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The examination of a drug in water and other aqueous systems gives insight into the chemistry of biological systems. This work aims to study the physico-chemical properties of chlorpheniramine maleate (drug) in water and aq-MeOH/EG (mono/dihydric alcohols) systems at different temperatures by using different techniques. Densities and viscosities of chlorpheniramine maleate in water and also in MeOH/EG aqueous solutions have been measured over a temperature range of 298.15 to 318.15 K. Number of several parameters, i.e., apparent molar volume (ϕv), partial molar volume (ϕvo), Hepler’s constant (∂CΡ/∂Ρ)T, Falkenhagen coefficient (A), and Jones-Dole coefficient (B) have been calculated by using experimentally measured density and viscosity values. The mentioned calculated parameters were found to be valuable in perceiving drug-drug and drug-solvent interactions. Moreover, one of the liquid chromatographic techniques such as RP-HPLC has also been performed, and the outcomes supported the conclusion procured from the volumetric and viscometric studies. Drug interactions help to understand their behavior in different solvent systems during drug development.
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Swati, Kolhe, Patil Dipak, Sonar Avinash, and Nehete Jayant. "Acoustical Studies on Heterocyclic Drugs In 1,4- Dioxane at 303.15 K." Indian Journal of Science and Technology 15, no. 6 (2022): 253–58. https://doi.org/10.17485/IJST/v15i6.1960.

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ABSTRACT <strong>Objective:</strong>&nbsp;Main objective is to study the solute solvent interactions in different heterocyclic drugs with the help of various acoustic properties.&nbsp;<strong>Method:</strong>&nbsp;The values of ultrasonic velocity are measured by using ultrasonic interferometer for solution of different concentrations of heterocyclic drugs (Lamivudine, Simvastatin) in 70% 1,4-dioxane as a solvent at 303.15 K. This experimental data is used to explore the acoustic properties like as intermolecular free length (Lf ), adiabatic compressibility (b s), apparent molal volume (ϕv), specific acoustic impedance (Z), apparent molal compressibility (ϕk), limiting apparent molal compressibility (ϕ0k ), limiting apparent molal volume (ϕ0v ), relative association (RA), solvation number (Sn) with respect to change in concentration.&nbsp;<strong>Finding :</strong>&nbsp;It is noticed that the solute solvent interaction between the heterocyclic drugs and dioxane systems are strong.&nbsp;<strong>Novelty:</strong>&nbsp;Heterocyclic drugs viz. Lamivudine and Simvastatin were used to study different acoustic properties. In present work the acoustic properties of Lamivudine and Simvastatin in 1,4-dioxane at 303.15K have been reported. <strong>Keywords:</strong> Lamivudine, Simvastatin, intermolecular free length, apparent molal volume, adiabatic compressibility, ultrasonic velocity.
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Pandey, J. D., S. Haroon, Krishna K. Dubey, Madhulika Upadhyaya, Ranjan Dey, and K. Misra. "Interactions of 6-aminopurine (adenine) in water and aqueous urea solutions." Canadian Journal of Chemistry 78, no. 12 (2000): 1561–69. http://dx.doi.org/10.1139/v00-141.

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Density (ρ), ultrasonic velocity (U), viscosity (η), and absorbance (A) of adenine in water, 1 M, 3 M, and 6 M aqueous urea solutions have been measured in the presence (and absence) of different concentrations of salts, i.e., NaCl, KCl, and CaCl2. From these measured values, the apparent molar volume (ϕv), experimental slope (Sv), apparent molar compressibility (ϕK), viscosity coefficients A and B of Jones–Dole equation, specific acoustic impedance (Z), hydration number (Sn), internal pressure (Pi), molar absorptivity (ε), hypochromicity (h), and oscillator strength (f) have been calculated at 298.15 K. The increasing and (or) decreasing trends of all these parameters indicate a strong interaction of urea in moderate concentration (1 M and 3 M) with adenine especially at the hydrophilic/polar and ionic sites, particularly by hydrogen bonding. However, the interaction at hydrophobic sites are relatively weaker. Higher concentrations of urea (6 M) have more denaturation effect. The π–π interactions (stacking) in adenine are more prominent in concentrated solutions and are also strengthened by the presence of cations up to an optimum concentration of salts (cut-off point). The self-association of urea and adenine is more significant in concentrated aqueous solutions and becomes negligible on dilution.Key words: interaction, adenine, urea, density, viscosity, and ultrasonic velocity.
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Indu, Saxena, Archna, Devi Rikkam, Kumar Vijay, Gautam Sadhana та Tripathi Jaya. "Study of the Influence of Alkyl Chain Cation Solvent Interactions on the Slope of ϕv v/s √C Curves in 1, 3-Butanediol-DMF Solvent Mixtures by Apparent Molar Volume Measurements". Chemical Science International Journal 19, № 3 (2017): 1–10. https://doi.org/10.9734/CSIJ/2017/33860.

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The concept of Frank’s hypothesis (that is the effect of large tetra alkyl ammonium iodides on the solvent structure, especially in the ion – ion and ion – solvent interactions) was found to be not applicable when water was replaced by one of organic solvent. That is, if study involves ion- ion and ion – solvent interactions in 1, 3 – Butane diol – DMF solvent mixture. The densities of these mixture and some adding tetra alkyl ammonium iodide salts solutions at different concentrations (0.02 – 0.14 M) have been determined at 298.15 K using Magnetic Float Densitometer technique. The apparent molar volume (ϕ<sub>v</sub>) and apparent molar volumes of transfer ∆ϕ<sub>v</sub><sup>0</sup> (tr) of the electrolytes in above solvent mixtures were calculated. ϕ<sub>v</sub> vs √C curves are plotted and explained the nature of molecular interactions by using slope (S<sub>v</sub>) values. Also, the significant role of varying dielectric constants (ϵ) of the selected solvent mixtures in the ionic interaction is discussed.
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Dissertations / Theses on the topic "Apparent molar volume (ϕv)"

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Wang, Zhongning. "Apparent and partial molar heat capacities and volumes of aqueous chelating agents, EDTA and NTA." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1998. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp01/MQ36191.pdf.

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Liu, Bing. "Properties Model for Aqueous Sodium Chloride Solutions near the Critical Point of Water." Diss., CLICK HERE for online access, 2005. http://contentdm.lib.byu.edu/ETD/image/etd1034.pdf.

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Clarke, Rodney George Francis. "Amino acids under hydrothermal conditions : apparent molar volumes, apparent molar heat capacities, and acid/base dissociation constants for aqueous gas-alanine, gbs-alanine, glycine, and proline at temperatures from 25 to 250°C and pressures up to 30.0 MPa /." 2000.

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Book chapters on the topic "Apparent molar volume (ϕv)"

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Anderson, Greg M., and David A. Crerar. "Partial and Apparent Molar Properties." In Thermodynamics in Geochemistry. Oxford University Press, 1993. http://dx.doi.org/10.1093/oso/9780195064643.003.0013.

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To this point we have developed a method of dealing with processes involving for the most part material (phases) of fixed composition. To progress further, we need to develop ways of dealing with the properties of dissolved substances, and with phases of variable composition. In other words, we need to deal with solutions. We have seen that the properties of homogeneous substances (usually, but not necessarily pure) are either total or molar properties (neglecting, as usual, specific properties). But obviously substances change drastically when they dissolve. How can we obtain properties for the dissolved substance alone, as opposed to the solution of which it is a part? Properties of dissolved substances are called apparent molar and partial molar properties, and these are the tools we need to discuss the thermodynamics of solutions in the following chapters. Partial molar properties are defined by partial derivatives (equations 2.22,9.7), which does not provide a very easy route to understanding them. There is however a highly intuitive way of thinking about partial molar properties. We will use volume as an example because it is readily visualized, but all relations derived can be used equally well for any other state variable. It will be useful to begin by realizing that we can also use derivatives to define molar properties of pure phases; this mathematical treatment is discussed in Chapter 2. Consider first the volume of a crystalline phase such as NaCl. The volume occupied by the salt, V, varies directly with the quantity of salt, so that a plot of volume versus number of moles of salt is a straight line (Figure 9.1).
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Kaur, Harsimaran, Kailash Chandra Juglan, and Nabaparna Chakraborty. "A Review on the Acoustic and Thermodynamic Properties of Sugar Alcohols." In Cutting-Edge Applications of Nanomaterials in Biomedical Sciences. IGI Global, 2023. http://dx.doi.org/10.4018/979-8-3693-0448-8.ch022.

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In order to examine the non-ideal behaviour of a liquid, it is crucial to conduct investigations. To determine excess properties, a range of measurable properties can be utilized in experimental calculations. Major characteristics to consider in binary and ternary mixtures include density and apparent molar volume. From a thermodynamic standpoint, several combination characteristics, various thermodynamic features, such as partial molar volumes, at infinite dilution, hold great significance. The purpose of this review is to provide a summary of recent research on the acoustics and thermodynamics of sugar alcohols in various mixtures and temperatures. Sugar alcohols are widely used in the nutrition and pharmacological industries, and many medical applications. They function as low-calorie sweeteners, providing a sweet flavour without rapidly raising blood sugar levels. Specific sugar alcohols, like xylitol, support dental health. Furthermore, acoustics can be employed as a tool for particle sizing, as well as for revealing information about the microstructure of the dispersed system.
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Prehoda, Kenneth E., and John L. Markley. "Use of Partial Molar Volumes of Model Compounds in the Interpretation of High-Pressure Effects on Proteins." In High Pressure Effects in Molecular Biophysics and Enzymology. Oxford University Press, 1996. http://dx.doi.org/10.1093/oso/9780195097221.003.0006.

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The transfer of liquid hydrocarbons into water is accompanied by a large decrease in volume at 25 °C and atmospheric pressure, with typical values for ΔV°tr of — 2.0 ml mol methylene−1. Considering the large amount of apolar surface that is exposed when a globular protein unfolds, the hydrocarbon transfer results imply that the change in volume accompanying the unfolding process (ΔV°obs) should be highly negative under these conditions. However, experimental data on the pressure denaturation of proteins typically yield relatively small values of ΔV°obs at atmospheric pressure and 25 °C. We analyze this apparent inconsistency in terms of a simple thermodynamic dissection of the partial molar volume. This approach allows the volume effects that result from solute-solvent interactions to be determined from experimental partial molar volumes. The use of absolute quantities (partial molar volumes) circumvents assumptions associated with the use of results from transfer experiments. An important finding is that hydration of apolar species is less dense than bulk water. This discovery leads to the conclusion that the contribution to ΔV°obs for protein unfolding from the hydration of apolar surfaces is highly positive, contrary to predictions based on transfer data. Further, hydration of polar surfaces makes a positive contribution to ΔV°obs. The large, positive term from the differential hydration of the folded and unfolded states is compensated by the difference in free volume of the protein in the two states. This finding provides a new framework for interpreting pressure effects on macromolecules. The full characterization of a macromolecular system requires knowledge of the effect of pressure on the system. The thermodynamic information obtained from using pressure as a perturbation is a volume change for the particular reaction being studied. The observed volume change, ΔV°obs, for protein unfolding may provide insight into the mechanisms that determine the three-dimensional structure of the folded state. Pressure denaturation experiments have been demonstrated for a number of proteins, including ribonuclease A (Gill &amp; Glogovsky, 1965; Brandts et al., 1970), chymotrypsinogen (Hawley, 1971), metmyoglobin (Zipp &amp; Kauzmann, 1973), and, more recently, lysozyme (Samarasinghe et al., 1992) and staphylococcal nuclease (Royer et al., 1993).
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