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Since DDE is a stable breakdown product of DDT, this indicates mainly past ingestion.
One of these tests measures the breakdown products of a blood complement protein known as Factor B.
In a study that was published in 2005, doctors at the Cincinnati Children's Environmental Health Center at the Cincinnati Children's Hospital Medical Center found that the higher a child's urine cotinine level (a breakdown product of nicotine and an indicator of tobacco smoke exposure that's excreted in the urine), the lower the performance on tests of math, reading, and visual-spatial skills.
The team found lower amounts of serotonin and a key serotonin breakdown product in the shift workers.
Chief among these are DDE (dichlorodiphenyldichloroethylene), a breakdown product of the once widely used herbicide DDT (dichlorodiphenyltrichloroethane), and polychlorinated biphenyls (PCBs), once used as dielectric fluids in capacitors and transformers.
Belonging to this OCP group is DDE, a breakdown product of DDT, which was used as an agricultural insecticide until it was banned in the UK in the 1970s.
These gases are the hydrocarbon breakdown product of organic binders - especially urethane-based cold-set and shell mold systems - released during pouring as the metal comes in contact with the mold or core surface.
Cotinine is a metabolic breakdown product of nicotine that is found in urine and is easily measured.
Bilirubin, a breakdown product of red blood cells, accumulates in the skin, resulting in the yellow or jaundice appearance of these babies.
Tests at the Centers for Disease Control and Prevention in Atlanta turned up a metabolic breakdown product of DEHP in nearly every sample, the team reports in an upcoming Environmental Health Perspectives.
The weak environmental estrogens included p-nonylphenol (a breakdown product of alkylphenol ethoxylates, which are used in various products such as washing and cleaning agents, emulsifiers, wetting agents, and foaming and foam-reducing agents) and the organochlorine pesticides methoxychlor and endosulfan.
We urge all companies that sell products containing PFOA directly or as breakdown product to provide warnings to their customers.