Sentence examples for pcbs from inspiring English sources

The recent revelation of extremely high levels of contaminants such as mercury, cadmium and PCBs in dolphin meat has led some Japanese officials, concerned for the health of the citizenry, to an examination of the policy of eating cetaceans".

But PCBs are persistent chemicals, and their effects are felt even today.

The question is, why?PCBs do their damage by binding to a protein called the aryl hydrocarbon receptor, or AHR, thus stopping it working properly.

Two of them seem particularly resistant to the effects of PCBs.

Organochlorines are unpleasant chemicals such as dioxins and PCBs (polychlorinated biphenyls) produced by industry that hang around in the environment.

Hazardous materials such as asbestos, arsenic, mercury and PCBs end up buried in the sand, burned in the open or dumped at sea.

PCB levels in the environment have dropped since the manufacture and use of the compounds were curtailed, but so much electrical equipment containing PCBs is still in use that there is a continuing possibility of environmental damage.

The two missing links in the chain (a phenylalanine and a leucine, for aficionados) are encoded in the gene for ordinary tomcod AHR by six genetic "letters" that are missing from the DNA found in PCB-resistant Hudson tomcod.

An off-the-shelf printed circuit board (PCB), containing a microcontroller, a wireless receiver and a transmitter, is mounted on the insect's back.

This year, for example, General Electric will dredge 1.8m cubic metres (2.4m cubic yards) of PCB-contaminated sediment out of 60km (35 miles) of the Hudson.

Dredging will continue over the next few years, after which the river should be PCB-free.