Considerable research efforts have been used in the development of floating drug delivery system including gas generation system, swelling systems and low density systems. In the development of low density systems the porous carriers are used because of its characteristics such as stable uniform porous structure, high surface area, tunable pore size and well-defined surface properties. This rev...

INTRODUCTION Absorption of drugs through the gastrointestinal tract poses a variety of limitations, making the in vivo performance of drug delivery systems uncertain. Following on from recent advances, in a time of increased consideration of floating drug delivery systems, it is as important as ever to continue the progress by studying different aspects of these systems. Moreover, it seems impe...

This paper introduces a technique to style and develop a completely pipelined and optimized design for Floating Point embedded processor in FPGA exploitation IEEE 754 format. The Floating purpose embedded processor performs many operations such as FP-Arithmetic, FP-Logical, FP-Trigonometric, FP-Vector, FP-Complex, FP-Signed, FP-Unsigned. In an exceedingly existing system, a fixed point illustra...

Time-domain limitations due to right half-plane zeros and poles in linear multivariable control systems are studied. Lower bounds on the interaction are derived. They show not only how the location of zeros and poles are critical in multivariable systems, but also how the zero and pole directions in4uence the performance. The results are illustrated on the quadruple-tank process, which is a new...

Linear sjstem realization problems require the construction of a linear system realiization, or a quadruple of real matrices F,G, H, J, of a given real rational W ( s ) , so ithat W(s) = J + H'(sI F)-'G. When W(s) has certain properties, corresponding ;to symmetry, passivity, or losslwness, it is possible to select a realization that closely (but not necessarily exactly) reflects thesepropertie...

The present investigation is concerned about the development of floating bioadhesive drug delivery system of venlafaxine hydrochloride which after oral administration exhibits a unique combination of floating and bioadhesion to prolong gastric residence time and increase drug bioavailability within the stomach. The floating bioadhesive tablets were prepared by the wet granulation method using d...

Utilizing cyanobacteria as a bioenergy resource is difficult due to the cost and energy consuming harvests of microalgal biomass. In this study, an auto-floating system was developed by increasing the photobiological H2 production in the heterocysts of filamentous cyanobacteria. An amount of 1.0 μM of diuron, which inhibited O2 production in cyanobacteria, resulted in a high rate of H2 producti...

in this paper the separation of saffron stigma from stamen and petal in a vertical wind tunnel has been evaluated. a wind tunnel with adjustable speed of 0.1 m s-1 intervals has been developed and used for the experiments. floating velocities of flower components (petal, stigma and stamen) were measured at one, eight, 38 and 60 hours after harvesting. subsequently, the separation was tested by ...

PURPOSE Find a novel delivery system for oral administration of drugs that have absorption window in the upper part of gastrointestinal (GI) track. METHODS Dipyridamole was chosen as the model drug. A novel system, which combined the osmotic pump controlled release system and the floating system, was designed; matrix tablets (MT) were prepared for compares. The effects of pH, temperature and ...

Implementation of floating point algorithms in FPGA (Field Programmable Gate Arrays) creates an open problem. One of possible solutions is the representation of floating point numbers as an integer (fixed point) logarithm (32 bit) [1]. Basic arithmetical operations can be performed in the logarithm numbering system which is suitable for FPGA and ASIC implementation. Simulator of such system has...