Science Progress articles from December 2002

Science Progress archives from December 2002

Single crystal time-of-flight neutron diffraction.
December 22, 2002... The last century has seen a large development in diffraction techniques. The time-of--flight neutron diffraction method is now so advanced that it provides high precision results for position and thermal parameters, which are complementary to...

Microporous materials.
December 22, 2002... All materials possess interatomic or interionic voids that are typically too small for any molecular species to enter. However, there is a class of crystalline materials that contain internal voids, and apertures, that are large enough for...

Comparative biology of [gamma][delta]T cells.
December 22, 2002... Accumulative evidence suggests that resident [gamma][delta] T cells in epithelia are biologically distinct from systemic [gamma][delta] T cells in the circulation. Murine resident [gamma][delta] T cells have innate immune characteristics and...

Gastrointestinal diseases of Napoleon in Saint Helena: causes of death.
December 22, 2002... The fact that Napoleon 1st died from gastric cancer seems to be well established. Arguments for the hypothesis of chronic arsenic poisoning have recently been developed in the literature. This study, focused on the gastrointestinal diseases of...