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Against next year's review conference of the Non-Proliferation Treaty, the nuclear powers need something tangible to offer their critics. An interim fixed-term comprehensive test-ban is the best opportunity.
The University of São Paulo believes it should be making a more prominent mark on the world outside Brazil, but the difficulties of doing so from within a still-developing country are greater and less tangible than may be thought.
A double insight into visual accommodation by the eye lens in birds and into the activity of a superfamily of metabolic enzymes is provided by the structure of turkey lens Scrystallin.
For the lab — a nitric oxide analyser, a ratio imaging microscope system for the life sciences, a device for producing digital images from slides, hyphenated systems and a selection of detectors.
