Controlled release formations of drugs were prepared with matrix materials of the natural polysaccharides sodium alginate and +/--carrageenan. The drugs used were sodium salicylate (anionic) and lidocaine-HCl (cationic). The release characteristics of the drugs were studied under different pH and compositions of aqueous media. The cationic drug (lidocaine-HCl) was released more slowly than the anionic one (sodium salicylate) because of the negative charge of the matrices. The release from both sodium alginate and +/--carrageenan tablet was retarded in acidic medium. At the same pH of the medium, the release into buffer solutions (containing metallic cations Na(+) and K(+), respectively) was slower than into HC1 solution.

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An extensive work has been done, across a number of fields, in modeling organizational processes. A tension has existed between the attempts to provide a rich expression of organizational activities and the desire to support the work as it actually takes places. A static business process is characterized by stable network connections, use of powerful computing devices, and an easy access to various knowledge sources within the corporate Intranet. In modeling a business process into a component, a major challenge is whether the mechanism of component combination at the code-level is readily available. Currently there is little experience concerning the modeling of relationships between components and their communication for business processes. It is considered that the connector should take charge of interactions between the software components and the associated information about the component composition, role and specification. This paper proposes business process composition method for development of web applications. Specifically we focus on the interactions of the connectors that are the interfaces between the business processes in web component. We describe the method and demonstrate that this algorithm is able to process components and interfaces. We then show the viability of this method by implementing a simple stock trading system.