51.   Niezabitowska advises parents to never put toxic substances into recognizable beverage containers.

52.   Other antibodies are paired with radioactive or other toxic substances that attach to and kill the cell.

53.   Q. I have read that certain houseplants are particularly effective at removing toxic substances from the air.

54.   Plutonium is a highly toxic substance that can cause cancer if inhaled or ingested in even minute amounts.

55.   Preservationists have said they fear the fine dust covering the church may contain toxic substances and could eventually damage it.

56.   Risk factors may include low educational and income levels, poor prenatal care and exposure to toxic substances.

57.   Should the water going through the system contain toxic substances like heavy metals, the fish would serve as a monitor, Drenner said.

58.   Some highly toxic substances, including the amatoxins, strychnine, ricin and many others are derived from plants.

59.   Some, like tetracyline, can break down into toxic substances.

60.   Some of the packaged formulas sold as herbal medicines contain drugs or toxic substances such as lead, mercury or arsenic, according to health officials and scientists.