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Science News for August 13, 1999


Novel chemistry induced by ultashort laser pulses

Researchers use ultrashort laser pulses to activate a critical surface reaction, allowing for the oxidation of CO molecules on transition metal surfaces. This novel approach enables the system to rapidly transfer energy into the oxygen-metal bond, outpacing desorption processes and unlocking new chemical pathways.

SourceMax-Planck-Gesellschaft·JournalScience·DateAug 13, 1999

Keeping one’s distance not always a bad thing: repulsion between quantum dots helps determine lasing characteristics, researchers find

Researchers have discovered that quantum dots repel each other, which may govern their self-organization and be crucial for controlling dot characteristics. This effect can help form more uniform and orderly arrays of dots, leading to improved lasing frequency and intensity.

SourceDOE/Sandia National Laboratories·JournalPhysical Review Letters·DateAug 13, 1999

Scientists image key steps in bacterial infection

Researchers have obtained X-ray images of crucial steps in bacterial infection, revealing the structure of pili and adhesins that enable bacteria to cling to tissue. The findings provide new insights into the development of effective antimicrobial strategies and vaccine candidates.

SourceWashU Medicine·JournalScience·DateAug 13, 1999

Stanford scientists use noise to sort proteins

Researchers create device that harnesses thermal fluctuations to separate membrane-associated molecules, providing a novel approach for studying cellular processes. The invention builds upon previous work on Brownian ratchets and utilizes microfabrication techniques to manufacture the device at an affordable cost.

SourceStanford University·JournalScience·DateAug 13, 1999