Aisha Siddiqui

Magnetic Fluid Model Induced by Peristaltic Waves

To understand theoretically the flow properties of physiological fluids, we have considered as a model of the peristaltic motion in a tube, with a sinusoidal wave of small amplitude traveling down its wall. The mathematical model considers a viscous incompressible fluid under the effect of a transverse magnetic field. The wavelength of the traveling wave is taken to be large. The expressions for the stream function, the axial velocity, the pressure gradient and the pressure rise per wavelength have been obtained. The results obtained in the analysis have been evaluated analytically and discussed with the help of graphs. The significance of the Hartmann number has been pointed out by comparing the results with hydrodynamic case. Further, the analogy between the magnetohydrodynamic fluid and hydrodynamic fluid in a porous medium has also been considered.

On semi-inverse solutions for the time-dependent flows of a second-grade fluid

This paper deals with analytical solutions for the time-dependent equations arising in a second-grade fluid. The solutions have been developed by assuming certain forms of the stream function. Expressions for velocity components are obtained for flows in plane polar, axisymmetric cylindrical, and axisymmetric spherical polar coordinates. The obtained solutions are compared with existing results.

Anti-seizure activity of flower extracts of Nepeta bractaeta in Swiss albino mice

Epilepsy is a neurological disorder characterized by unprovoked, recurring seizures that disrupts the nervous system and can cause mental and physical dysfunction. Based on the ethno pharmacological information of the plant, the methanolic and aqueous extracts of the flowers of Nepeta bractaeta was evaluated for its antiepileptic activity. The methanolic and aqueous extracts of the flowers of Nepeta bracteata were observed for their antiepileptic activity by increased current Electroshock seizures (ICES) test and Pentylenetetrazole (PTZ) test using Swiss albino mice. Both the extracts showed significant activity in ICES and PTZ induced convulsions in comparison to control. In ICES model, NBAE at higher dose showed 16.7 % and NBME at higher dose showed 33.3 % protection against seizure and in PTZ model, NBME at higher dose showed 33.3 % protection against seizure. From the experiments performed, it can be said that Nepeta bractaeta does possess anticonvulsant property.

Anticonvulsant activity of methanolic and aqueous extracts of Melissa parviflora in experimentally induced Swiss albino mice

The aim of the present study was to evaluate the anticonvulsant effect of whole plant extracts of Melissa parviflora using MES and PTZ induced seizures models. The dried whole plant was subjected to extraction in methanol and water. The extracts were subjected to phytochemical tests and the carbohydrate, flavonols, coumarins, glycosides and steroid were found to be present. The methanolic and aqueous extracts of the plant of Melissa parviflora were observed for their anticonvulsant activity by Maximal Electroshock seizures (MES) test and Pentylenetetrazole (PTZ) test using Swiss albino mice. Both the extracts showed significant activity in MES and PTZ induced convulsions in comparison to control. From the literature surveys as well experiments performed, it can be said that Melissa parviflora does pose anticonvulsant property.