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Wyświetlanie 1-10 z 28
Tytuł:
Studies of densities, viscosities and ultrasonic speeds of binary mixtures containing isopropyl alcohol and ketones at different temperatures
Autorzy:
Srinivas, S. S. J.
Tulasi Koteswari Bai, B.
Babu Rao, K.
Narendra, K.
Sarath Babu, M.
Powiązania:
https://bibliotekanauki.pl/articles/412144.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
ultrasonic velocity
density
viscosity
acoustic parameters
Opis:
The densities, viscosities and ultrasonic velocities of binary liquid mixtures of Isopropyl alcohol with acetophenone and methyl isobutyl ketone (MIBK) have been measured at temperatures 298.15 and 308.15 K over the entire range of mole fraction. From these data, acoustical parameters such as adiabatic compressibility (β), free volume (Vf) and free length (Lf) have been estimated using the standard relations. The results are interpreted in terms of molecular interactions present in the mixtures.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 10, 2; 151-158
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Triazolo derivatives: Synthesis and ultrasonic behaviour in DMF and DMSO solutions over a wide range of temperatures
Autorzy:
Baluja, Shipra
Pithiya, Mona
Hirapara, Asmita
Lava, Divyata
Powiązania:
https://bibliotekanauki.pl/articles/1158749.pdf
Data publikacji:
2018
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
DMF
DMSO
Triazole
acoustical parameters
ultrasonic velocity
Opis:
Ultrasonic velocity, density and viscosity of two new triazolo derivatives were measured in DMF and DMSO over a range of temperatures. From these measured experimental data, various acoustical parameters were calculated to understand the molecular interactions occurring in the solution.
Źródło:
World Scientific News; 2018, 114; 177-194
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical ultrasonic velocities in binary liquid mixture containing aniline and anisole at different temperatures – a comparative study
Autorzy:
Sreedevi, Y.
Srinivasu, Ch.
Fakruddin, Sk.
Narendra, K.
Venkateswara Rao, B.R.
Nirmal Rajeev, Y.
Powiązania:
https://bibliotekanauki.pl/articles/412398.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
ultrasonic velocity
aniline
anisole
binary liquid mixtures
Opis:
Ultrasonic velocity is measured experimentally at 3MHz frequency in the binary liquid mixture containing aniline and anisole at different temperatures over the entire composition range and theoretical values of ultrasonic velocity have been evaluated by using Nomoto’s relation, Impedance relation, Van Dael ideal mixture relation. These theoretical values are compared with the experimental values. A good agreement has been found between experimental and theoretical ultrasonic velocities.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 7, 2; 120-124
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acoustical studies of binary liquid mixtures of p-chlorotoluene in benzene at different temperatures
Autorzy:
Kumar, G. P.
Babu, Ch. P.
Samatha, K
Jyosthna, A. N.
Showrilu, K.
Powiązania:
https://bibliotekanauki.pl/articles/412275.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
ultrasonic velocity
thermodynamic parameters
p-chlorotoluene
molecular interactions
Opis:
Ultrasonic velocities (U), densities (ρ), and coefficient of viscosities (η) are measured for binary mixtures containing (i) p-chlorotoluene and (ii) benzene at 303.15 K, 308.15 K, 313.15 K and 318.15 K to understand the molecular interaction. Various acoustical parameters such as adiabatic compressibility (βad), free length (Lf), acoustic impedance (Z), free volume (Vf), molar volume (Vm), Rao’s constant (R), Wada’s constant (W) and internal pressure (πi), are calculated from the measured values of U, ρ, and η. The trend in acoustical parameters also substantiates to asses strong molecular interactions.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 10; 25-37
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acoustical studies of some synthesized Schiff base derivatives in dimethylsulphoxide at 303.15 K, by ultrasonic velocity measurement
Autorzy:
Gopi, C.
Santhi, N.
Powiązania:
https://bibliotekanauki.pl/articles/412151.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
density
viscosity
ultrasonic velocity
DMSO
acoustical parameters
molecular interactions
Opis:
The density, viscosity and sound velocity of five Schiff bases (1-5) derivatives in DMSO solutions have been studied at 303.15 K over a wide range of concentration. From these experimental data, some acoustical parameters such as Molar volume (Vm), Specific Acoustic Impedance (Z), Adiabatic compressibility (βad), Intermolecular Free Length (Lf), Rao’s Constant (R), Molar compressibility (W), Relaxation time(τ), van der Waals constant (b), Relaxation strength (r), Relative association (RA), Isothermal compressibility (βT ) , Isothermal expansion co-efficient (α) ,Free volume (Vf) and Internal pressure (πi) and Ultrasonic attenuation (α/f²) have been evaluated. A fairly good correlation between a given parameter and concentration is observed. The results are interpreted in terms of molecular interactions like solvent-solvent, solvent-solute and solute-solute interactions.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 17, 1; 50-66
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Ultrasonic velocity, density and viscosity measurement of pyrimidine derivatives in 1,4-dioxane and DMF at various temperatures
Autorzy:
Baluja, Shipra
Nandha, Kajal
Ramavat, Paras
Powiązania:
https://bibliotekanauki.pl/articles/1190220.pdf
Data publikacji:
2016
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Pyrimidine derivatives
ultrasonic velocity
viscometry
molecular interaction
apparent molar compressibility
Opis:
The estimation of density, viscosity and ultrasonic velocity of solution of pyrimidine derivatives in 1,4-dioxane and N,N-dimethylformamide was carried out as functions of concentration (0.01 to 0.1 M) and temperature (298.15 to 318.15 K). Some acoustical and apparent parameters such as acoustical impedance (Z), intermolecular free length (Lf), adiabatic compressibility (κs), molar compressibility (W), Vander Waals constant (b), relaxation strength (r), internal pressure (π), apparent molar compressibility (fk), apparent molar volume (fv) etc., have been evaluated using experimental data of ultrasonic velocity (U), density (ρ) and viscosity (η). The characterization of these synthesized compounds was done by IR, 1H NMR and mass spectral data.
Źródło:
World Scientific News; 2016, 44; 257-278
2392-2192
Pojawia się w:
World Scientific News
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Theoretical evaluation of ultrasonic velocities in binary liquid mixtures at different temperatures
Autorzy:
Bhavani, M.D.
Ratnakar, A.
Kavitha, Ch.
Powiązania:
https://bibliotekanauki.pl/articles/411591.pdf
Data publikacji:
2013
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
binary liquid mixtures
o-anisidene
o-cresol
Nomoto
ultrasonic velocity
Opis:
Ultrasonic velocities calculated from various theories and relations like Nomoto's relation, Van dael ideal mixing relation, Impedance relation, Rao's specific velocity relation and Jungie's theory are compared with experimental values in binary liquid mixtures o-anisidine with o-cresol at temperatures 303.15, 308.15, 313.15 and 318.15 K over the entire mole fraction range. The relative applicability of these theories to the present system is checked and discussed. A good agreement is observed between experimental and theoretical values. The results are explained in the light of molecular interactions occuring in these mixtures.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2013, 5; 1-6
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Acoustical studies on molecular interaction of 1,3,4-pyrazoline derivatives using ultrasonic technique at 303.15 K
Autorzy:
Santhi, A. R. N.
Powiązania:
https://bibliotekanauki.pl/articles/412461.pdf
Data publikacji:
2014
Wydawca:
Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
Tematy:
Binary mixture
molecular interaction
ultrasonic velocity
density
viscosity
free length
Opis:
The acoustical parameters for the binary liquid mixtures containing Pyrazoline derivatives in DMF have been estimated at 303.15 K, from the measured values of ultrasonic velocity (U), density (ρ) and viscosity (η). From these data some of acoustical parameters such as adiabatic compressibility (β), free length (Lf), acoustic impedance (Z), Rao’s constant (R), molar compressibility (W), relaxation time (τ), free volume (Vf) and internal pressure (πi), etc., have been computed using the standard relations. The results have been discussed in terms of molecular interactions.
Źródło:
International Letters of Chemistry, Physics and Astronomy; 2014, 20, 1; 100-115
2299-3843
Pojawia się w:
International Letters of Chemistry, Physics and Astronomy
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Impact of curing process on ultrasonic pulse velocity in stabilized soils
Wpływ procesu pielęgnacji na prędkość impulsu ultradźwiękowego w gruntach stabilizowanych
Autorzy:
Miturski, M.
Powiązania:
https://bibliotekanauki.pl/articles/2084071.pdf
Data publikacji:
2021
Wydawca:
Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
Tematy:
ultrasonic pulse velocity
soil stabilized
curing period
Opis:
The process of care of soils stabilized with hydraulic binder affects the results of destructive and non- -destructive tests. The process itself depends on the country performing stabilization. This study investigated the effect of immersion of stabilized soil samples during the curing process on the ultrasonic pulse velocity. The study showed an increase in velocity of 12.9% in samples immersed in water for seven days. The paper presents test results for seven methods of soil treatment.
Źródło:
Acta Scientiarum Polonorum. Architectura; 2021, 20, 4; 69-74
1644-0633
Pojawia się w:
Acta Scientiarum Polonorum. Architectura
Dostawca treści:
Biblioteka Nauki
Artykuł
Tytuł:
Influence of Artifical Discontinuities in Rocks on the Propagation of Ultrasonic P-Waves
Autorzy:
Kamaci, Z.
Akgüneş, B.
Powiązania:
https://bibliotekanauki.pl/articles/1029977.pdf
Data publikacji:
2018-05
Wydawca:
Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:
ultrasonic pulse velocity
joint number
the wave attenuation
Opis:
In this work, experiments were conducted on rectangular prismatic samples with dimensions of 60×60×360 mm^{3}, which were cut from the rock blocks with no joint or anisotropy. Rock samples were obtained from different quarries in Turkey, known by the rock type as Afyon Çay marble, Burdur red limestone, Afyon gray, Lymra limestone, Muğla dolomite, Denizli travertine, and Isparta andesite. Experimental results indicated an increase in seismic wave attenuation as the number of artificial joints increased. However, seismic wave attenuation rate was found to be higher on the samples with parallel joint pattern than the samples which consisted of various directional joint pattern. This feature has explained the importance of seismic velocity anisotropy in rocks. The relationship between the number of joints in seven different rock samples and ultrasonic P-wave velocity was examined statistically and the results were evaluated together with similar studies in the literature.
Źródło:
Acta Physica Polonica A; 2018, 133, 5; 1144-1149
0587-4246
1898-794X
Pojawia się w:
Acta Physica Polonica A
Dostawca treści:
Biblioteka Nauki
Artykuł
Wyświetlanie 1-10 z 28

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