Penn study find people respond poorly, while feeling only ’slightly’ tired

Sleep: Don’t be too sure you’re getting enough of it.

Those who believe they can function well on six or fewer hours of sleep every night may be accumulating a “sleep debt” that cuts into their normal cognitive abilities, according to research conducted at the University of Pennsylvania School of Medicine. What’s more, the research indicates, those people may be too sleep-deprived to know it.

A highly sensitive, inexpensive “lab-on-a-chip” that provides warning within seconds of even trace amounts of toxic chemicals in water was designed and demonstrated recently by National Institute of Standards and Technology (NIST) scientists and collaborators.

The prototype sensor system monitors the natural response of bacterial cells bound within the microscopic channels of a plastic microfluidics device–a miniaturized chemical and biochemical analysis system. In the presence of certain

The Goualougo Triangle, nestled between two rivers in a Central African rain forest, is so remote that primate researchers who traveled 34 miles, mostly by foot, from the nearest village through dense forests and swampland to get there, have discovered a rare find: chimpanzees that have had very little or no contact at all with humans.

The chimpanzees’ behavior when first coming in contact with the researchers was a telltale sign of lack of human exposure — the chimpanzees didn’t run and

Researchers participating in the California NanoSystems Institute (CNSI) at the University of California at Santa Barbara (UCSB) and at Los Angeles (UCLA) have invented a new technique for producing “Ultra High Density Nanowire Lattices and Circuits”–the title of their paper being published expeditiously at 2:00 p.m. March 13 on the “Science Express” website, Science Magazine’s rapid portal for publication of significant research findings to appear subsequently in print in Science.

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Discovery highlights molecular screening work at Institute of Chemistry and Cell Biology
Boston, Mass. — Scientists studying how cells know when and where to divide now have a new tool to study the final fast stage of cell division. The first experiments using this new tool reveal some of the molecular conversation that helps a cell tightly choreograph the time and place of pinching into two cells. In the March 14 Science, researchers from Harvard Medical School (HMS) and colleagues report

In the latest edition of Nature (March 13th, 2003) a group of scientist led by professor Pertti Hari from the University of Helsinki presents a novel observation: ultraviolet radiation induced a flux of nitrogen oxides (NOx) from pine needles to the atmosphere. This result is interesting because nitrogen oxides participate in several essential chemical reactions in the atmosphere. On the other hand, plants can utilize the nitrogen of NOx as their nutrient.

It has been difficult to detect the