Celery petiole lesion damage caused by insecticide

3'-blocking damage of DNA as a mutagenic lesion caused by hydrogen peroxide in Escherichia coli.

Ionizing radiation and hydrogen peroxide (H2O2) produce many types of oxidative DNA damage such as strand breaks, apurinic/apyrimidinic (AP) sites, base modifications and 3'-blocking damage such as 3'-phosphoglycolated and 3'-phosphorylated termini. AP sites and 3'-blocking damage are repairable by exonuclease III and endonuclease IV in Escherichia coli. XthA-nfo double mutants of E. coli, whic...

Mania caused by a diencephalic lesion.

We describe the case of a young male patient, SN, who suffered a MR-documented ischaemic lesion of both dorsomedial thalami and presented with a transient maniform syndrome. SN's neuropsychological, structural and functional imaging findings are compared with similar reported cases and are discussed in the framework of fronto-subcortical circuits and their proposed behavioural disorders. SN's m...

Ocular damage caused by Paraquat.

Simulating cholinesterase inhibition in birds caused by dietary insecticide exposure

We describe a stochastic simulation model that simulates avian foraging in an agricultural landscape to evaluate factors affecting dietary insecticide exposure and to predict post-exposure cholinesterase (ChE) inhibition. To evaluate the model, we simulated published field studies and found that model predictions of insecticide decay and ChE inhibition reasonably approximated most observed resu...

Membrane damage caused by bile salts

The membrane lipids were extracted into acetone/methanol and transferred to light petroleum. Components of the extract were separated on silica gel columns (Dunphy & Brodie, 197 1). The radioactivity in the lipid extract from membranes was found to be in carotenoid (65%), quinone (lo%), phytoene (7%) and squalene (5%). The labelled carotenoids were identified by comparison with those of a stand...