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

32.   Scientists later discovered that the tumors also contain substances that can stop angiogenesis.

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

34.   Some of the soy burgers also contain a substance many people are anxious to avoid -- monosodium glutamate.

35.   Some appear to contain solid substances, while others hold liquids.

36.   Team trainers will also remind players that they will be tested for ephedra, and will brief them on what products contain the substance.

37.   The new fabric contains a substance that starves the mites to death by attacking the fungi on which they depend.

38.   The product, called Finish, contains a substance that encourages cotton bolls to open, allowing growers to harvest their crop a few days early.

39.   The substance was contained in an envelope that also contained pornographic photographs, and was mailed to the software licensing company from Malaysia.

40.   This is because many plant foods contain substances that inhibit the absorption of critical nutrients.