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Science News for October 6, 1999


Tiny tubes have a big future

Researchers have reported the highest and most stable electron emission densities observed to date, desirable for flat-panel displays and microwave amplifiers. The carbon nanotubes' sharp tip and chemical robustness contribute to their superior stability and uniform emission.

SourceOffice of Naval Research·JournalApplied Physics Letters·DateOct 6, 1999

Estrogen may play role in prevention of cataracts

Researchers found that estrogen can reduce the risk of developing cataracts by up to 77%, with estradiol and estrone showing particular promise. The study used rats with induced ovarian failure to test the effects of different estrogens on cataract development.

SourceIndiana University·JournalProceedings of the National Academy of Sciences·DateOct 6, 1999

Lasers see red

A team at the Naval Research Laboratory has successfully demonstrated room-temperature operation of an interband III-V laser diode emitting at a wavelength beyond three microns. This achievement brings gallium-antimony-based technology closer to practical and portable mid-infrared systems needed for military and commercial applications.

Long-QT syndrome

A Mayo Clinic study found that a genetic defect known as long-QT syndrome may be the cause of many unexplained drownings. The research identified a genetic mutation in a 19-year-old woman who died after a near-drowning, and subsequent testing revealed that her mother and sister also had inherited the condition.

SourceMayo Clinic·JournalNew England Journal of Medicine·DateOct 6, 1999

New materials from glass threads

Researchers at NRL have created a new type of glass material for use in future opto-electronic devices, which could lead to advancements in optical sensors, miniaturized optical systems, high-speed communication components, and more. The material's properties are highly dependent on its layered structure and composition.

The wonderful world of waves

The SHOWEX experiment aims to better predict wave formation and severity, improving navigation safety at sea and weather forecasting. Researchers will use a range of instruments, including aircraft, craft, buoys, and subsurface sensors, to study wave components and their interactions.