Ultrasonic, volumetric and viscometric studies of lactose in mixed solvent of DMF–H2O at 298, 308 and 318 K
Acoustic parameters are useful to understand the effect of temperature on the interactions of lactose in mixed solvent of (DMF–H2O). Density (ρ), viscosity (η), sound speed (u) and refractive index (nD) of lactose with mixed solvent of N,N-dimethylformamide-water or (DMF–H2O) from 0.1050 to 1.045 m...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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Elsevier
2017-05-01
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| Series: | Arabian Journal of Chemistry |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S1878535213002189 |
| _version_ | 1811274107261550592 |
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| author | R. Mehra Brij B. Malav |
| author_facet | R. Mehra Brij B. Malav |
| author_sort | R. Mehra |
| collection | DOAJ |
| description | Acoustic parameters are useful to understand the effect of temperature on the interactions of lactose in mixed solvent of (DMF–H2O). Density (ρ), viscosity (η), sound speed (u) and refractive index (nD) of lactose with mixed solvent of N,N-dimethylformamide-water or (DMF–H2O) from 0.1050 to 1.045 m at different temperatures have been determined using bicapillary pycnometer, Ostwald’s viscometer, Abbe’s refractometer and single frequency ultrasonic interferometer at 2 MHz frequency respectively. The derived parameters like apparent molal volume (ϕv), free volume (Vf), intermolecular free length (Lf), acoustic relaxation time (τ), Gibb’s free energy (ΔG), internal pressure (πi), Rao’s constant (Rm), Wada’s constant (W), adiabatic compressibility (β), acoustic impedance (Z), absorption coefficient (α/f2) and molar refractivity (RD) have been determined from experimental data. All the measurements have been carried out in a refrigerated water bath with circulating medium having an uncertainty of ±0.1 °C. Positive values of the Jones–Dole coefficient (B) indicate structure making tendency. The solute–solvent interactions are stronger at all the temperatures taken for the study. |
| first_indexed | 2024-04-12T23:13:05Z |
| format | Article |
| id | doaj.art-bf03a8bfdb17465bb6a9eafeb5433029 |
| institution | Directory Open Access Journal |
| issn | 1878-5352 |
| language | English |
| last_indexed | 2024-04-12T23:13:05Z |
| publishDate | 2017-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Arabian Journal of Chemistry |
| spelling | doaj.art-bf03a8bfdb17465bb6a9eafeb54330292022-12-22T03:12:46ZengElsevierArabian Journal of Chemistry1878-53522017-05-0110S2S1894S190010.1016/j.arabjc.2013.07.018Ultrasonic, volumetric and viscometric studies of lactose in mixed solvent of DMF–H2O at 298, 308 and 318 KR. MehraBrij B. MalavAcoustic parameters are useful to understand the effect of temperature on the interactions of lactose in mixed solvent of (DMF–H2O). Density (ρ), viscosity (η), sound speed (u) and refractive index (nD) of lactose with mixed solvent of N,N-dimethylformamide-water or (DMF–H2O) from 0.1050 to 1.045 m at different temperatures have been determined using bicapillary pycnometer, Ostwald’s viscometer, Abbe’s refractometer and single frequency ultrasonic interferometer at 2 MHz frequency respectively. The derived parameters like apparent molal volume (ϕv), free volume (Vf), intermolecular free length (Lf), acoustic relaxation time (τ), Gibb’s free energy (ΔG), internal pressure (πi), Rao’s constant (Rm), Wada’s constant (W), adiabatic compressibility (β), acoustic impedance (Z), absorption coefficient (α/f2) and molar refractivity (RD) have been determined from experimental data. All the measurements have been carried out in a refrigerated water bath with circulating medium having an uncertainty of ±0.1 °C. Positive values of the Jones–Dole coefficient (B) indicate structure making tendency. The solute–solvent interactions are stronger at all the temperatures taken for the study.http://www.sciencedirect.com/science/article/pii/S1878535213002189DensityViscosityLactoseN,N-dimethylformamideJones–Dole equation |
| spellingShingle | R. Mehra Brij B. Malav Ultrasonic, volumetric and viscometric studies of lactose in mixed solvent of DMF–H2O at 298, 308 and 318 K Arabian Journal of Chemistry Density Viscosity Lactose N,N-dimethylformamide Jones–Dole equation |
| title | Ultrasonic, volumetric and viscometric studies of lactose in mixed solvent of DMF–H2O at 298, 308 and 318 K |
| title_full | Ultrasonic, volumetric and viscometric studies of lactose in mixed solvent of DMF–H2O at 298, 308 and 318 K |
| title_fullStr | Ultrasonic, volumetric and viscometric studies of lactose in mixed solvent of DMF–H2O at 298, 308 and 318 K |
| title_full_unstemmed | Ultrasonic, volumetric and viscometric studies of lactose in mixed solvent of DMF–H2O at 298, 308 and 318 K |
| title_short | Ultrasonic, volumetric and viscometric studies of lactose in mixed solvent of DMF–H2O at 298, 308 and 318 K |
| title_sort | ultrasonic volumetric and viscometric studies of lactose in mixed solvent of dmf h2o at 298 308 and 318 k |
| topic | Density Viscosity Lactose N,N-dimethylformamide Jones–Dole equation |
| url | http://www.sciencedirect.com/science/article/pii/S1878535213002189 |
| work_keys_str_mv | AT rmehra ultrasonicvolumetricandviscometricstudiesoflactoseinmixedsolventofdmfh2oat298308and318k AT brijbmalav ultrasonicvolumetricandviscometricstudiesoflactoseinmixedsolventofdmfh2oat298308and318k |