41.   Authorities were reacting to a warning by the European Union that certain batches of the oil produced in Spain and Greece were found to contain traces of hydrocarbons.

42.   But a U.S. Army laboratory concluded that missile fragments contained traces of VX.

43.   But a U.S. Army laboratory concluded that missile fragments contained traces of the gas.

44.   But a U.S. army laboratory, in tests whose results were disclosed in June, concluded that missile fragments contained traces of the gas.

45.   He added that six mail bags at the U.S. Embassy in Peru were tested and one was found to contain traces of anthrax.

46.   It contains only traces of tetrahydrocannabinol, or THC, the substance that makes pot smokers high.

47.   Morning urine also contains traces of melatonin, a hormone with immunity-enhancing qualities.

48.   One recent study found a third of malaria pills sampled in parts of Asia contained no trace of the real medication.

49.   Scientists have suggested that positive tests could be linked to supposedly clean nutritional supplements that contain traces of the steroid.

50.   Six letters believed to contain traces of anthrax appeared to be a hoax according to preliminary government laboratory tests, officials said Sunday.