31.   She suggested that the dopamine transporter might be a key player in ADHD, and if so, measuring the amount of the molecules could serve as a test.

32.   Several years ago, Monterey County supervisors for the first time ordered growers to place meters on their wells so officials could measure the amount of water they used.

33.   The balance of payments measures the amount of demand for Canadian goods at home and abroad and the dollars needed to buy them.

34.   The data transfer speed measures the amount of data that can be sent as a steady stream in a second.

35.   The effectiveness of the therapy would be largely unknown without new tests to measure the amount of HIV, the so-called viral load, in the blood.

36.   The factory-use rate, which measures the amount of industrial capacity in use, fell slightly in April.

37.   The instruments measure the amount of water in the soil as well as water pressure building up in the soil.

38.   The lidar can precisely measure the amounts of ozone at various altitudes above the observatory, but it can do much more.

39.   The mannequin measures the amount of fluid injected and reads the type of medication with a bar-code scanner.

40.   The method relies on the subjective human palate, and scientists have increasingly turned instead to measuring the amount of capsaicin in the pepper.