US Food and Drug Administration regulatory pesticide residue monitoring of human foods: 2009-2017.

Pesticides such as insecticides, fungicides, and herbicides can protect crops from insects, fungi, weeds, and other pests but must be applied following label instructions so that the pesticide residues in human and animal foods do not exceed maximum residue limits (MRLs, known in the US as pesticide tolerances). The US Food and Drug Administration (FDA) collects and tests foods for pesticide residues to enforce compliance with tolerances and publishes annual reports on pesticide testing results. In this study, results for over 56,000 human food samples collected and analysed under the FDA pesticide residue monitoring programme between fiscal years (FY) 2009 to 2017 were reviewed to identify trends not apparent in annual reports.

Trapping effects of green and black tea extracts on peroxidation-derived carbonyl substances of seal blubber oil.

Green and black tea extracts were employed to stabilize seal blubber oil at 60 degrees C for 140 h. On the basis of the headspace SPME-GC-MS analysis, with the addition of green/black tea extracts, the contents of acetaldehyde, acrolein, malondialdehyde, and propanal, four major lipid peroxidation products, were reduced. The inhibition rates of acrolein formation by green tea and black tea extracts were 98.

Antioxidant activity of plant extracts on the inhibition of citral off-odor formation.

Grape seed, pomegranate seed, green tea, and black tea extracts were used to inhibit the off-odor from citral degradation. A 0.1 M citrate buffer (pH 3), containing 100 ppm citral and 200 ppm gallic acid equivalent plant extract, was incubated at 40 degrees C.