In this paper we evaluate the present state of the seismic regime in Southern California using the concentration parameter of seismogenic faults (K~/., SOI~OLEV and ZAVYALOV, 1981). The purpose of this work is to identify potential sites for large earthquakes during the next five or ten years. The data for this study derived from the California Institute of Technology's catalog of southern Cali...

Several methods have been reported for preparation of nitriles by dehydration of aldoximes using selenium dioxide-chloroform, diphosphorus tetraiodide, trifluoroacetic anhydride-pyridine, chlorosulphonyl isocyanate, 4,6-dipheny-2-methylthio-pyriliumtetrafluoro borate, copper (II) acetate-acetonitrile, trichloroacetyl chloride-triethylamine, triphenylphosphine/carbontetrachloride (PPh3/CCl4) in ...

To utilize ICT (Information and Communication Technologies) to increase competitiveness of a firm under the current stringent demands of global market is a basic approach. This paper investigates how the latest ICT platforms, Web 2.0, can help the firm achieving this purpose. Eight functionalities of Web 2.0 are identified from reviews of its actual applications in enterprises. Then contributio...

Montmorillonite KSF has been used as an effective and non-toxic heterogeneous catalyst for one-pot synthesis of 5-substituted 1H-tetrazoles via [3+2] cycloaddition of sodium azide with a wide variety of nitriles. The reaction afforded high yields of the desired products in a short reaction time under mild reaction conditions. The catalyst can be recovered by simple filtration and reuse...

The influence of structured solids (amorphous, lamellar and 3D crystalline) on the regioselectivity dibromination naphthalene using bromine at room temperature has been investigated. more acidic amorphous catalysts an clay give rapid reactions lead to a large preponderance 1,4-dibromonaphthalene over 1,5-dibromo compound, while calcined KSF clay, bentonite material, after short reaction time gi...