ABSTRACTDifferent indole and carbazole derivatives have been synthesized via Fischer indole synthesis in the presence of catalytic amount of H3PW12O40 in methanol Key Words: Fischer indole synthesis, carbazole, indole, Keggin-type heteropolyacids. 

             

 The concepts of fuzzy regular-I-closed set and fuzzy semi-I-regular set in fuzzy ideal topological spaces are investigated and some of their properties are obtained. Key words: Topological, Spaces, Fuzzy, Regular, Sets

This paper describes an improved procedure and simple and green method for the efficient and facile synthesis of 3,4-dihydropyrimidinones with excellent yields using inexpensive heteropolyacid catalyst in the presence of green solvent.

The electronic band structure and optical properties of cubic KCaF3 are studied using the density functional theory. The calculated band structure of cubic KCaF3 shows an indirect band gap with two values of 5.95 eV and 5.94 eV at the…

This paper reviews analytical methods, instrumental developments and applications for derivatization of amines and amino acids with 7-Chloro-4-nitrobenzoxadiazole (NBD-Cl) and 4-Fluoro-7-nitro-2,1,3-benzoxadiazole (NBD-F) using high performance liquid chromatography (HPLC). Discussion of the literature related to the application from 2001 to 2010…

Two novel benzothiazole derivatives (2-[(1,3-benzothiazol-2-ylamino)methyl]-1-naphthol (1) and 2-{[(6-methyl-1,3-benzothiazol-2-yl)amino]methyl}-1-naphthol) (2) have been synthesized. The protecting effect of these compounds on low carbon steel (LCS) in 0.1M hydrochloric acid (HCl) solutions as corrosion media was investigated using potentiodynamic polarization technique, and electrochemical…

CV, SWV and CA have been used to investigate the electrochemical behaviour of 2-hydroxy-5-bromobenzaldehyde polyacrylamide (PABSB), 2-hydroxy-5-chlorobenzaldehyde polyacrylamide (PACSB) and 2-hydroxy-5-methylbenzaldehyde polyacrylamide (PAMSB) at the mercury electrode in aqueous media. The bromo- and chloro- derivatives were electroative while the halide-free…

In the presence of outliers, least squares estimation is inefficient and can be biased. In the 1980’s several alternatives to M-estimation were proposed as attempts to overcome the lack of resistance. Least Trimmed Squares (LTS) is a viable alternative and…

This study introduces and shows the applicability of the XploRe commands of the parametric and the semiparametric single index models, which are two most popular alternatives of each other. The commands required for the estimation in all stages of the…