Dietary exposure to polycyclic aromatic hydrocarbons in pets: Evidence from urinary biomonitoring.

Little is known about the pet exposure to polycyclic aromatic hydrocarbons (PAHs), despite their shared indoor environments with humans. This study is the first to investigate PAH exposure in pets by analyzing paired dog food and urine samples. Specifically, levels and distributions of PAHs and their metabolites were determined in 47 commercial dried granule dog food samples and corresponding urine samples to assess exposure through dietary intake.

An AIE-based fluorescent dye for selective staining of polyamide microplastics without pretreatment: Applications to environmental samples and zebrafish.

A novel staining dye, BEM ((1E,1'E)-1,1'-([2,2'-bithiophene]-5,5'-diyl)bis(N-(9-ethyl-9H-carbazol-3-yl)methanimine)) was synthesized for selective identification of polyamide (PA) micrplastics. BEM showed unique photophysical properties such as solvatochromism, intramolecular charge transfer (ICT), and aggregation induced emission (AIE) which were demonstrated through spectroscopic analysis and density functional theory (DFT) calculations. The optimal staining conditions for selective staining of PA by BEM were established by evaluating the staining efficiency according to the variation of the solvent compositions, concentrations of BEM, and staining durations.