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This study concerns a new antiretroviral drug named CRS 74, which has a limited bioavailability because of its low aqueous solubility and dissolution rate. To improve these properties, CRS 74 can be recrystallized by using Liquid Anti-Solvent (LAS) crystallization. Ethanol is chosen as the solvent under study for the molecule and water as the anti-solvent. Since solubility data is limited, it i...

Résumé : Le calcul de concepts formels, et plus généralement l’usage des treillis de Galois pour l’extraction de connaissances, a motivé de très nombreuses recherches. Grâce à des progrès algorithmiques récents, ces techniques fournissent des motifs particulièrement intéressants pour l’analyse de grandes matrices codant l’expression de milliers de gènes dans des situations biologiques variées. ...

Many factors can influence the efficiency of extraction antioxidants from plants. The most important parameters that affect in terms yield and quality include temperature, time, particle size. aim our study was to select optimal temperature for two types tea, obtain extracts with high values total phenols, flavonoids, antiradical activity according DPPH method, restoring strength FRAP method ta...

The vapor extraction (VAPEX) process, a solvent-based enhanced oil recovery process has been found promising for some heavy oil reservoirs. In this work, the VAPEX process is studied using a compositional simulator on a number of single-block and multiple block fractured systems. PVT data of one of an Iranian heavy oil reservoir are used to tune the equation of state. Effects of fracture sp...

A data warehouse collects and maintains a large amount of data from several distributed and heterogeneous data sources. Often the data is stored in the form of materialized views in order to provide fast access to the integrated data, regardless of the availability of the data sources. In this paper we focus on the following problem: for a given set of materialized select-project-join (SPJ) vie...

1,3-Butadiene, BD is produced from C4-cut by extractive distillation. The separation of 1,3-Butadiene from C4-cut is not possible through the conventional distillation processes, because several mixtures have consisted of close boiling points constituents and make azeotrope. The BASF extraction distillation process in BD unit of Jam and Amirkabir Petrochemical Company improves the relative vola...

Being able to formulate useful SQL queries is a fundamental skill required by many software development professionals. Masteringthis skill is a difficultprocess, requiringconsiderable practice and effort on the part of the student. In addition, assessment of SQL query formulation skills is a process that does not appear to have been thoroughly researched, and numerous problems are inherent to t...