A mild and efficient catalytic method for synthesis of 5-alkoxycarbonyl-4-aryl-3, 4dihydropyrimidin-2(1H)-ones using KSF montmorillonite as catalyst is described.

T O M Á S U N D A B E Y T I A , * , † S H L O M O N I R , † T A M A R A P O L U B E S O V A , † G I O R A R Y T W O , † , ‡ E S M E R A L D A M O R I L L O , § A N D C E L I A M A Q U E D A § Seagram Center for Soil and Water Sciences, Faculty of Agricultural, Food and Environmental Quality Sciences, P.O. Box 12, Rehovot 76100, Israel, Tel Hai Academic College, Upper Galilee, 12210 Israel, and ...

STUDY OF CONTROLLED RELEASE OF DAPSONE FROM MODIFIED MONTMORILLONITE AND POLYMER MATRICES

This study is concerned with electrochemical investigation of novel high-performance proton exchange membranes based on bio-functionalized montmorillonite and Nafion. It was found that the incorporation of 2 wt% BMMT into Nafion polyelectrolyte matrix results in significantly improved methanol-air fuel cell efficiency of 30% compared to 14% for Nafion(R)117, and about 23-times higher membrane s...

Abstraet--A quantitative method for determination of montmorillonite in the soil clay fraction, using X-ray spectrometry, is proposed. The method is based on the fact that polyvinylpyrrolidone (PVP) is adsorbed on the interlayer surfaces of montmorillonite, giving a first order c-axis spacing of 26/~, while it is not adsorbed on other swelling clays. The experimental conditions to obtain a maxi...

RNA oligomers greater than 35-40 mers in length form in one day in the montmorillonite clay-catalyzed reaction of unblocked RNA monomers at 25 degrees C in aqueous solution.