71.   Coast Guard investigators took oil samples from about a dozen recently arrived ships to try to match its chemical composition to the dumped oil.

72.   Data from the telescope should tell scientists the temperature, density and chemical composition of the shock wave as it passes through interstellar gas.

73.   Denver International Airport could become a test site for a German explosives-detection system that can identify the chemical composition of a suspicious item.

74.   In his speech earlier, Dr Lim said limestone and granite offer vast commercial potential, depending on their chemical compositions.

75.   Medical authorities have accused Obel of failure to publish its chemical composition and trial methods.

76.   Most are caused by change in the chemical composition of the lens resulting in a loss of lens transparency.

77.   Ultra-pure lead electrodes give the batteries a longer lifespan as their chemical composition deteriorates slower compared to normal battery plates.

78.   He used laser-Raman imaging, a technique that provides a chemical composition of a sample as well as a two-dimensional picture of it.