@base . a , , ; , , ; "Nigerian Journal of Chemical Research." ; ; ; "1119-0221" ; ; "1119-0221" ; ; "1119-0221" ; "Nigerian Journal of Chemical Research" , "Nigerian Journal of Chemical Research." ; . a ; "1119-0221" ; . . a ; . a . a ; "1119-0221" ; . a , ; "Nigerian Journal of Chemical Research" . a ; ; "20041117140900.0"^^ ; ; . "Nigeria" .