31. At times, Simpson took notes as experts testified about complex procedures measured in nanograms and millimeters. 32. At one point he asked how many nanograms of DNA there are in a microliter of blood. 33. The Strasbourg institute found levels of arsenic ranging from seven to 38 nanograms per milligram of hair. 34. The maximum permissible amount of berkelium-249 in the human skeleton is 0.4 nanograms . 35. Serum ferritin in excess of 1000 nanograms per millilitre of blood is almost always attributable to haemochromatosis. 36. International ski federation rules allow 15 nanograms per milliliter in testing for marijuana; the IOC allows none. 37. The Olympic medical commission said Leipold's sample showed 20 nanograms of nandrolone per milliliter of urine. 38. The reading is expressed in nanograms ( ng ) _ billionths of a gram _ per milliliter of blood. 39. It has been estimated it would take five million nanograms of morphine to enhance the performance of a racehorse. 40. They show that the chemicals either kill or deform copepods at concentrations as low as 100 nanograms a liter.
