December 2011

Phytochemical and antibacterial activities of leaf extracts of Nepeta cataria

The phytochemical screening of the dichloromethane and methanolic extracts showed presence of flavonoids (flavones and flavonols), coumarins and glycosides. These secondary metabolites are considered to be responsible for the antimicrobial activity against Staphyococcus aureus, Kliebsiella pneumoniae and Salmonella typhii. The TLC analysis of the dichloromethane extract revealed presence of 3...

Author(s): Edewor, T.  I. and Usman, L. A.

December 2011

Spectrophotometric studies of charge transfer complex of 8-hydroxyquinoline with 1,4-benzoquinone

The interaction between donor 8-hydroxyquinoline (HQ) and π - acceptor 1, 4-benzoqinone (BQ) has been studied in the solution as well as in the solid state. Infrared spectroscopic data indicate that a charge transfer interaction between the donor and acceptor are due to π → π*/ n → π* transition by the formation of radical ion pairs. In solution state, the formation constant, the extinction...

Author(s): Asmaa A. Ibrahim