| b-esterase activities and blood cell morphology in the frog leptodactylus chaquensis (amphibia: leptodactylidae) on rice agroecosystems from santa fe province (argentina). | activity of b-esterases (bche: butyrylcholinesterase and cbe: carboxylesterase using two model substrates: α-naphthyl acetate and 4-nitrophenyl valerate) in a native frog, leptodactylus chaquensis from rice fields (rf1: methamidophos and rf2: cypermethrin and endosulfan sprayed by aircraft) and non-contaminated area (pristine forest) was measured. the ability of pyridine-2-aldoxime methochloride (2-pam) to reactivate bche levels was also explored. in addition, changes in blood cell morphology an ... | 2011 | 21113795 |