May 31, 2004 Vol. 82, Iss. 22

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	Table of Contents May 31, 2004 Volume 82, Number 22 p. 1
	CONTROLLING MAD COW DISEASE Malady presents a difficult regulatory challenge, in part because of gaps in the science of prion diseases.
	COVER: Photodisc image

	THREE RINGS Mix-and-heat strategy yields Borromean rings. DRUG PRICING Abbott Laboratories defends 400% price hike for Norvir. CHANGE AT ACC Gregori Lebedev steps down after two years leading industry trade group. H2 PURIFICATION Calixarene crystals function as absorbents that could purify H2 for fuel cells. PATENT RIGHTS Canada's Supreme Court upholds patent protection of genetically modified crops. FILLING NANOTUBES Nanotubes precisely filled with metal atoms hold promise as catalysts and semiconductors. TEACHING SCHOLARS NSF lauds eight scholars, four in areas of chemistry, for dedication to research and education. DRUGS IN CHINA China's food and drug administration may shutter as many as 1,000 plants that do not meet manufacturing standards. HIPPO SWEAT Chemists analyze hippopotamus sweat and find it contains a sunscreen and an antibiotic.

	BUSINESS CONCENTRATES COMBICHEM SYMPOSIUM Russian conference addresses the changing role of combinatorial chemistry in drug discovery. PHOSPHORUS IN CHINA Conditions that made China competitive in phosphorus production have changed for the worse. VOCS IN EUROPE Rules on emissions of solvents containing volatile organic compounds are being tightened and will affect small and medium-sized producers. NEW IMAGE FOR SIGMA-ALDRICH Company wants a niche in custom manufacture of active pharmaceutical ingredients and advanced drug intermediates.

	GOVERNMENT CONCENTRATES YUCCA MOUNTAIN DOE says new studies justify its design for nuclear waste repository.

	SCIENCE/TECHNOLOGY CONCENTRATES NAVAL RESEARCH LABORATORY Research center has made numerous advances reaching from land to sea, air, and space. INDUSTRIAL BIOTECH Conference highlights challenges required to produce chemical feedstocks from renewable resources. HEPTAZINES Odd family of nitrogen-rich molecules is enjoying a renaissance, thanks to its potential in creating carbon nitride materials.

	OFFICIAL REPORTS FROM THE ANAHEIM MEETING COMMENT QUO VADIS CHEMISTRY?

	LETTERS NEWSCRIPTS