A reliable and sensitive headspace solid-phase microextraction gas chromatography-mass spectrometry method for simultaneous determination of different organophosphorus pesticides in dried medicinal plant samples is described. The analytes were extracted by single-walled carbon nanotubes as a new solid-phase microextraction adsorbent. The developed method showed good performance. For diazinon an...

The heterogeneous ozonation of suspended malathion and chlorpyrifos particles are studied in real-time with a vacuum ultraviolet photoionization aerosol time-of-flight mass spectrometer (VUV-ATOFMS). The pesticide particles with the diameter of hundreds of nanometers are generated by the homogeneous nucleation method using azelaic acid as nucleus. The reactions are carried out in an aerosol rea...

The lesser mealworm (LMW, Alphitobius diaperinus (Panzer); Coleoptera: Tenebrionidae) is increasingly used as a novel food and feed source. materials on which this insect species reared may contain residues of insecticides from agricultural use. objective study was to determine whether selected insecticides, spiked the substrate, could bioaccumulate in LMW and/or affect growth or survival. Inse...

Abstract Field evaluation of six grain storage technologies under hot and arid conditions (32–42 °C; rainfall < 450 mm/year) in two locations Zimbabwe were conducted over seasons. The treatments included three hermetic (Purdue Improved Crop Storage bags, GrainPro Super Grainbags, metal silos); synthetic pesticide-based treatments; an untreated control, all using threshed sorghum grain. Sampl...

Abstract A method for simultaneous determination of trace four organophosphorus pesticides residues in animal liver samples has been developed and validated. This is based on the preliminary sample preparation using extraction target compound with a mixture toluene-cyclohexane by means up-to-date accelerated solvent (ASE), liquid-liquid partitioning acetonitrile hexane, additional clean up step...

BACKGROUND Many pesticides in current use have recently been revealed as in vitro androgen receptor (AR) antagonists, but information about their combined effects is lacking. OBJECTIVE We investigated the combined effects and the competitive AR antagonism of pesticide mixtures. METHODS We used the MDA-kb2 assay to test a combination of eight AR antagonists that did not also possess AR agoni...