A h igh-per formance l i q u i d chromatography (HPLC) method has been deve loped f o r t h e s e p a r a t i o n of o l e f i n , s a t u r a t e , and a r o m a t i c hydrocarbons found i n h i g h b o i l i n g d i s t i l l a t e s and r e s i d u e s of s h a l e o i l and i n whole s h a l e o i l s . The dual-column chromatographic system uses s i l i c a g e l i n one column and s i l i...

abstract mefenamic acid is a nonsteroidal anti-inflammatory drug (nsaid) that has analgesic,anti-infammatory and antipyretic actions. it is used to relieve mild to moderate pains. solid-phase extraction of mefenamic acid by a polymer grafted to silica gel is reported . poly allyl glycidyl ether/iminodiacetic acid-co-n, n-dimethylacrylamide was synthesized and grafted to silica gel and was used ...

background diazinon is one of the most widely used organophosphrous pesticides in the world may affect animals and human. objectives this study was done to assess whether pseudomonas plecoglossicida can grow on diazinon as the sole carbon metabolic source in laboratory and agricultural soil. materials and methods serial dilutions of pure and commercial diazinon in minimal salt medium were made ...