Autor: Chaurasia, S. - Katalog OPAC zbiorów

Skocz do pozycji: 1.

Tytuł:: Seasonal variations of airborne pollen in Allahabad, India
Autorzy:: Sahney, M
Chaurasia, S.
Powiązania:: https://bibliotekanauki.pl/articles/51958.pdf
Data publikacji:: 2008
Wydawca:: Instytut Medycyny Wsi
Tematy:: pollen
Allahabad
pollen grain
airborne pollen
Holoptelea integrifolia
pollen type
pollen season
meteorological parameter
India
seasonal variation
Źródło:: Annals of Agricultural and Environmental Medicine; 2008, 15, 2
1232-1966
Pojawia się w:: Annals of Agricultural and Environmental Medicine
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 2.

Tytuł:: Effect of Temperature on Non-Destructive Wave Propagation in Uranium Monopnictides
Autorzy:: Singh, R.
Singh, M.
Chaurasia, S.
Powiązania:: https://bibliotekanauki.pl/articles/1808103.pdf
Data publikacji:: 2009-03
Wydawca:: Polska Akademia Nauk. Instytut Fizyki PAN
Tematy:: 43.35.Cg
62.20.de
62.20.D-
Opis:: Acoustic attenuation due to phonon-phonon interaction, thermoelastic mechanism and dislocation damping were evaluated in uranium monopnictides (viz. UN, UAs and USb) in the temperature range 50-500 K, along the three crystallographic directions of propagation, viz. [100], [110] and [111] for longitudinal and shear modes of propagation. Due to antiferromagnetic property of these compounds ultrasonic attenuation due to magnon-phonon interaction was also obtained. The second- and third-order elastic moduli of B1-type uranium monopnictides were obtained using electrostatic and the Born repulsive potentials. Gruneisen numbers and acoustic coupling constants were evaluated for longitudinal and shear waves along different directions of propagation and polarization. Results were discussed and compared with available data. It was found that the temperature dependence of attenuation due to phonon-phonon interaction and thermoelastic loss mechanisms follow the third and fourth order polynomial fit laws, respectively, and acoustic attenuation is mainly governed by phonon-phonon interaction in this temperature range.
Źródło:: Acta Physica Polonica A; 2009, 115, 3; 664-670
0587-4246
1898-794X
Pojawia się w:: Acta Physica Polonica A
Dostawca treści:: Biblioteka Nauki

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Skocz do pozycji: 3.

Tytuł:: Simulation and sensitivity analysis for biodiesel production in a reactive distillation column
Autorzy:: Agarwal, M.
Singh, K.
Chaurasia, S. P.
Powiązania:: https://bibliotekanauki.pl/articles/779118.pdf
Data publikacji:: 2012
Wydawca:: Zachodniopomorski Uniwersytet Technologiczny w Szczecinie. Wydawnictwo Uczelniane ZUT w Szczecinie
Tematy:: biodiesel
reactive distillation
modeling
simulation
transesterification
sensitivity analysis
Opis:: The conventional process for biodiesel production by transesterification is still expensive due to a need of high excess of alcohol required and its recovery by distillation. The use of a reactive distillation process can reduce the amount of alcohol in the feed stream as it works on a simultaneous reaction and separation. In the present study, a mathematical model has been developed for biodiesel production from triglycerides in a reactive distillation column, which has been validated with the reported data and CHEMCAD results. The effects of process parameters such as methanol to oil feed ratio, feed temperature, and reaction time have been investigated. The sensitivity analysis shows that yield of ester increases with methanol to oil ratio and number of stages, however, it decreases with fl ow rate. The MATLAB simulated results show that methanol to oil molar ratio of 5:1 produces 90% (by wt.) of methyl ester in a residence time of 4.7 minutes.
Źródło:: Polish Journal of Chemical Technology; 2012, 14, 3; 59-65
1509-8117
1899-4741
Pojawia się w:: Polish Journal of Chemical Technology
Dostawca treści:: Biblioteka Nauki

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