61.   There are Web sites dedicated to all things Jell-O and physicists who analyze the chemical composition of the fun food.

62.   They have taken several approaches, including changing the chemical composition or the thickness of the paper.

63.   They can bombard a painting with neutrons in a technique called autoradiography to measure the half-life, and thus the chemical composition, of pigments.

64.   This is different from the replacement of brand-name drugs by less expensive generic drugs that have the same chemical composition.

65.   Using an infrared spectrophotometer, scientists can analyze reflected light from bomb fragments and determine their chemical composition and what kind of explosive was used.

66.   Visible light interacts with atoms and molecules to produce characteristic spectrums, patterns that reveal chemical composition.

67.   When the soil and ice are heated, instruments will record their emissions to try to pinpoint the chemical composition.

68.   When you drain the water from the tub, you may end up with staining, depending on the chemical composition of your water.

69.   Plastic substitutes can be manufactured by changing the chemical composition of manioc.

70.   Rebolo and his colleagues analyzed the spectrum of the visible star to try to decipher its chemical composition.