Selim Reza

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The recent progress in the field of Ti:Er:LiNbO3 waveguide lasers with emission wavelengths in the range 1530 nm < λ < 1603 nm is reviewed. After a short discussion of the relevant fabrication methods concepts and properties of different types of lasers with grating resonator, acoustooptically tunable Fabry Pérot type lasers and new ring laser structures(More)
This investigation describes the preparation and in vitro evaluation of gastroretentive floating tablet of theophylline. Two hydrophilic cellulose derivatives, Methocel K100M and Methocel K15MCR were evaluated for their gel forming and release controlling properties. Sodium bicarbonate and citric acid were incorporated as gas generating agents. The effects(More)
Diclofenac sodium loaded agarose beads were prepared and release profile of Diclofenac Sodium was investigated. Beads were prepared by dropping a hot aqueous agar solution into a beaker of chilled Paraffin oil and water. Water was made acidic to the pH of 1.65 using concentrated hydrochloric acid to reduce the prior diffusion of Diclofenac sodium into(More)
In an Optical WDM network, link/path failure may occur in a very normal way which may cause a great amount of data loss if the link is not restored to reroute the affected traffic accurately and quickly using the redundancy the network. Wavelength Division Multiplexed (WDM) networks, employing wavelength routing have emerged as the dominant technology to(More)
This investigation describes the preparation and in vitro evaluation of gastro retentive floating tablets of atorvastatin calcium. Two hydrophilic cellulose derivatives, Methocel K4M and Methocel K15M CR were used in floating tablets as gel forming agents to control drug release. Sodium bicarbonate and citric acid were incorporated as gas generating agents.(More)
-The development of Wavelength Division Multiplexing (WDM) technologies has increased enormously the transmission capacity of optical networks. Optical networks employing WDM is potential candidate for future Wide Area Network (WAN) because these networks are prone to component failure & carry large amount of traffic. However, any failure in the network can(More)
Controlled release co-matrix tablets of Ciprofloxacin HCl were prepared with different types of bioadhesive polymers e.g. Methocel K4M, Methocel K 15M CR and Methocel K 100LV, Povidone K-30, and Xanthan gum. Tablets prepared by direct compression method were subjected to in-vitro drug dissolution study for 8 hours in a simulated gastric fluid media using(More)
Controlled release matrix tablets of theophylline anhydrous were designed with different types of bioadhesive polymers. HPMC 15 cps and 50 cps, Na-CMC, Gelatin, Xanthun gum and PVP K-30 were selected to formulate matrix tablets. Tablets of theophylline were prepared by direct compression method and were subjected to in vitro drug dissolution for 8 hrs in a(More)
Type 2 diabetes mellitus is a heterogeneous disease which involves both defective insulin secretion and peripheral insulin resistance. Despite the availability of other agents for treatment of type 2 diabetes mellitus gliclazide, is preferred in diabetic therapy because of its selective inhibitory activity towards pancreatic K + -ATP channels, antioxidant(More)
Gastro retentive controlled release drug delivery system of Verapamil HCl was formulated to increase the gastric retention time of the dosage form with controlling the drug release pattern. Different grades of hydroxy propyl methyl cellulose derivatives; Methocel K4M and Methocel K15MCR were incorporated for their gel forming properties. Tablet buoyancy was(More)