How do PDMS-coated stir bars used as passive samplers integrate concentration peaks of pesticides in freshwater?

Silicone Wristbands as Personal Passive Samplers

Active-sampling approaches are commonly used for personal monitoring, but are limited by energy usage and data that may not represent an individual's exposure or bioavailable concentrations. Current passive techniques often involve extensive preparation, or are developed for only a small number of targeted compounds. In this work, we present a novel application for measuring bioavailable exposu...

Characterization and Application of Passive Samplers for Monitoring of Pesticides in Water.

Five different water passive samplers were calibrated under laboratory conditions for measurement of 124 legacy and current used pesticides. This study provides a protocol for the passive sampler preparation, calibration, extraction method and instrumental analysis. Sampling rates (RS) and passive sampler-water partition coefficients (KPW) were calculated for silicone rubber, polar organic chem...

How ideal do macaque monkeys integrate contours?

In this contribution, we present a joint study combining psychophysical investigations with macaque monkeys and probabilistic modelling of contour integration. We study the detection of Sand U-shaped contours of aligned Gabor patches among a set of unaligned distracters. This approach allows to compare quantitatively the performance of monkeys with the performance predicted by a probabilistic m...

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Determination of concentration of organophosphate pesticides

Pesticides are used extensively in agricultural lands in Northern provinces of Iran which makes river ecosystems more vulnerable to pesticides pollution. This study was conducted in three river estuaries (Babolrud, Tajanrud and Gorganrud), focusing mainly on the concentration levels of organophosphate pesticides (diazinon, malathion, azinphos-methyl) in the muscle tissue of golden mullet fish, ...