COVER: Mouse CD1 immune receptor with N-linked carbohydrates (stick structures at top and bottom) and with a bound glycosphingolipid (center) positioned for presentation to T cells exemplifies the key biological role carbohydrates play in immune recognition. Courtesy of Dirk Zajonc, Scripps Research Institute

SASOL SURFACTANTS
South African firm will shed surfactants unit, concentrate on core businesses.

STEM CELLS
Sen. Bill Frist parts company with the White House to back expanded U.S. stem cell research.

SYNTHESIS
A new family of carbene ligands opens the door to a broader range of chemical reactions.

BASELL SALE
Access Industries completes its purchase of BASF and Shell polyolefins joint venture.

BAYTRIL BAN
Antibiotic used in poultry is banned by FDA because it leads to resistant organisms.

CANCER 'COOKERS'
Carbon nanotubes in cancer cells kill the cells when exposed to near-IR radiation.

LIGHT UP
Researchers find a low-power method to upconvert green laser light to blue.

ARSENIC IN RICE
Study finds arsenic concentration in U.S. rice higher than that for other countries, but it's no cause for alarm, experts say.

SEMICONDUCTORS
Meeting highlights efforts to supply exotic materials for fast-growing markets.

MIDWEST ATTRACTION
Cincinnati hopes to become a biotech hub.