81.   They are issued by state health authorities when local fish are thought to be tainted by toxic substances that concentrate in the flesh of fish.

82.   They theorize that Gulf War syndrome is a product exposure to multiple toxic substances that, perhaps, make veterans more sensitive to everyday chemicals used here.

83.   TruServ Corp., the cooperative of True Value Hardware stores, lost a U.S. Supreme Court challenge of a California law that requires health warnings for toxic substances.

84.   Toxic substances are sent to the cell surface, where they kill the bacteria, she said.

85.   What they are searching for is a bit of Spanish fly, which in its pure form is known as cantharidin, a toxic substance quite rare in nature.

86.   Would require employers to keep records on toxic substances that their employees come into contact with in the workplace.

87.   Would you maintain that since innocent until proven guilty works well in court, we should continue to apply it to toxic substances?

88.   You might get a treatment, a potentially toxic substance or a placebo.

89.   Packages containing toxic substances were sent to several political targets in Britain, including Prime Minister Tony Blair, Scotland Yard said Friday night.

90.   Police are conducting tests on the cakes for toxic substances, said police spokesman Takao Niikura.