Ultrasonic studies on aqueous monosaccharides with enzyme amylase

Nithiyanantham, S.; Palaniappan, L.

doi:10.1016/j.molliq.2016.05.069

Cited by 10 publications

(7 citation statements)

References 20 publications

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“…From the same Table 1, the increase of viscosity with solute concentration also confirms the possibility of molecular association (Nithiyanantham and Palaniappan, 2016). The results unambiguously show that as water concentration increases, the number of water molecules tightly connected to the HPMC, Lactose and CaCl 2 tends to saturate the two lone pair of each oxygen atom.…”

Section: Resultssupporting

confidence: 59%

Physico-chemical studies on binary aqueous solutions of Anti-Viral Influenza drugs

Punitha¹,

Uvarani

Panneerselvam³

et al. 2019

Heliyon

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The ultrasonic velocity, density, viscosity and absorption have been measured for solution of Influenza Anti-Viral drugs (Amantadine and Oseltamivir) are presented at room temperature 303K. By taking measurements of Anti Influenza Viral drugs at 0.2, 0.4 and 0.6% concentrations of each solution. The aim of the study is to increase the solubility, stability, sweetness of drugs by the formation of complexation. The ultrasonic velocity, density and viscosity have been measured at 2MHz for the aqueous solutions of (i) Influenza Anti-Viral Drugs + HPMC (Hydroxy Propyl Methyl Cellulose), Lactose and CaCl 2 (Calcium Chloride at different concentrations at a temperature 303K.The acoustical parameters such as adiabatic compressibility (β), intermolecular free length (L f ), internal pressure (π i ), Rao's constant (R), relaxation time (τ), acoustical impedance (Z a ), absorption coefficient (α/f 2 ), free volume (V f ), cohesive energy and solvation number (Sn) have been computed. These properties are attributed to solute-solvent interactions through hydrogen bonding, segment-segment interaction, molecular association, polymer-solvent interaction, polymer-polymer interaction and etc. The total absorption can be considered as the sum of contributions from solute-solvent interactions. These results are further supported by FTIR studies.

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Section: Resultssupporting

confidence: 59%

Physico-chemical studies on binary aqueous solutions of Anti-Viral Influenza drugs

Punitha¹,

Uvarani

Panneerselvam³

et al. 2019

Heliyon

Self Cite

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“…Volumetric properties of some medicines have been measured in water and 0.02 mol kg –1 MgCl 2 ·6H 2 O at 298.15 and 308.15 K by Jamal et al The effect of sodium chloride and myo-inositol on volumetric and acoustical properties of aqueous solutions of DPH-HCl drug has been investigated by Jengathe et al The density, speed of sound, and viscosity values have been measured for aqueous solutions of DPH-HCl + (D−)-fructose, DPH-HCl + (D+)-galactose, and DPH-HCl + (D+)-lactose in our previous work . Special attention was also paid to study the volumetric properties and viscosity of the binary and ternary aqueous solutions of galactose, fructose, lactose, and sucrose. − Miracco et al measured the water activity in a binary aqueous solution of lactose. Isopiestic determinations for ternary aqueous solutions containing 1-hexyl-4-methylpyridinium bromide, 1-hexyl-3-methyl imidazolium chloride, fructose, and sucrose have been carried out in our previous work. , …”

Section: Introductionmentioning

confidence: 99%

Measurements and Correlation of Water Activity in Aqueous Solutions Containing Diphenhydramine-Hydrochloride Drug, (D+)-Galactose, (D−)-Fructose, (D+)-Lactose, and Sucrose at 298.15 K

Majdan-Cegincara

Zafarani-Moattar

2019

J. Chem. Eng. Data

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Water activity in aqueous solutions containing diphenhydraminehydrochloride, DPH-HCl, (D+)-galactose, (D−)-fructose, (D+)-lactose, and sucrose was measured using an improved isopiestic method at T = 298.15 K. Vapor pressure values were calculated from the measured water activity data. Nonrandom two-liquid (NRTL), NRF-NRTL, mNRTL, Wilson, TNRF-mNRTL and modified NRTL proposed by Xu local composition-based models were applied for correlating the water activity data for binary and ternary aqueous solutions containing the DPH-HCl drug and saccharides considered in this work. All of these models satisfactorily predicted the water activity data for the systems investigated. Water activity data and decreasing vapor pressure were utilized to highlight the solute−solvent interactions.

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“…As the number of hydrocarbon group increases, the sound velocity is found to increases. This behavior at such concentrations for the mixtures which is different from the ideal mixture behavior, can be attributed to the intermolecular interactions in the systems studied [21][22][23].…”

Section: Discussionmentioning

confidence: 78%

Physico-chemical Studies of Isomeric Butanols in Aniline with m-Xylene

Palaniappan

Nithiyanantham²,

Murugesan

2020

Chemistry Africa

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The values of sound velocity, density and viscosity have been measured at 303 K in the ternary systems of aniline + m-xylene + n, sec, tert and iso-butanols. From these data, acoustical parameters such as molar volume, adiabatic compressibility, free length, free volume and internal pressure have been estimated using the standard relations. The results are interpreted in terms of molecular interaction between the components of the mixtures. The presence of weak dipoleinduced dipole interactions of larger magnitude is confirmed in the ternary systems. Of all the isomeric butanols, 1-ol, and especially 2-ol are found to be good structure makers that make the ternary complexes. In addition the possible interactions between the components are further confirmed by their excess values.

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Ultrasonic studies on aqueous monosaccharides with enzyme amylase

Cited by 10 publications

References 20 publications

Physico-chemical studies on binary aqueous solutions of Anti-Viral Influenza drugs

Physico-chemical studies on binary aqueous solutions of Anti-Viral Influenza drugs

Measurements and Correlation of Water Activity in Aqueous Solutions Containing Diphenhydramine-Hydrochloride Drug, (D+)-Galactose, (D−)-Fructose, (D+)-Lactose, and Sucrose at 298.15 K

Physico-chemical Studies of Isomeric Butanols in Aniline with m-Xylene

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