51.   Free and his team are exploring how they might use cryptobiotic chemicals to help preserve vaccines in dry form.

52.   GE used the chemicals as insulators in electric capacitors.

53.   He says U.S. forces routinely repaired and maintained ships and aircraft using toxic chemicals that were often mishandled.

54.   He, for one, had to use less chemical this year, which also saves money.

55.   Her farm now uses an integrated pest-management system, which uses chemicals only as a last resort.

56.   Hernandez advised farmers how to use the chemicals to grow more coca leaves.

57.   However, Whittington said some of the plants have installed pollution controls or changed manufacturing processes so that toxic chemicals are not used.

58.   If this is not effective, a plumbing and heating contractor can use chemicals to de-lime the boiler.

59.   In practice, though, some dentists still use chemicals to sterilize equipment that is not heat-resistant, like the tabs that hold X-ray films.

60.   In this case, she said, the agency visited a Micro Flo factory in Georgia where the chemicals were used and found abundant evidence to support its case.