Copper rates, and carcass dressing percentages. Chronic copper toxicity does not normally occur in humans because of transport systems that regulate absorption and excretion. Autosomal recessive mutations in copper transport proteins can disable these systems, leading to Wilson's disease with copper accumulation and cirrhosis of the liver in persons who have inherited two defective genes. Elevated copper levels have also been linked to worsening symptoms of Alzheimer's disease. In the US, the Occupational Safety and Health Administration (OSHA) has designated a permissible exposure limit (PEL) for copper dust and fumes in the workplace as a time-weighted average (TWA) of 1 mg/m.
Brain Damage (song) "I can't think of anything to say", then Peter Watts' laugh and another sample "I think it's nice (ha ha ha)". with: The uncredited manic laughter is that of Pink Floyd's then-road manager, Peter Watts. Brain Damage (song) "Brain Damage" is the ninth track from English rock band Pink Floyd's 1973 album "The Dark Side of the Moon". It was sung on record by Roger Waters (with harmonies by David Gilmour), who would continue to sing it on his solo tours. Gilmour sang the lead vocal when Pink Floyd performed it live on their 1994 tour (as can be heard