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Science News Archive July 1997


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Second Look Acquits Gene Of Role In Breast Cancer

Researchers at Johns Hopkins Medicine found that the TSG101 gene, previously identified as a tumor suppressor, was consistently normal and undamaged in human breast cancer cells. The cells exhibited abnormal RNA splicing, which may be a result of cancer cells trying to activate normal cell behaviors in an abnormal way.

SourceJohns Hopkins Medicine·JournalCancer Research·DateJul 31, 1997

World's Smallest Silicon Mechanical Devices

Researchers at Cornell University have developed the world's smallest silicon mechanical devices, measuring just a few nanometers in size. These devices can be used for various applications, including modulating light signals for fiber optic communications and measuring tiny forces.

SourceCornell University·JournalJournal of Vacuum Science and Technology·DateJul 24, 1997

Scientists Create Hepatitis Infection

Researchers successfully infect chimpanzees with a defined HCV sequence, identifying essential elements for infection and paving the way for the development of better treatments. The availability of this infectious sequence will enable precise studies of HCV replication and inform the creation of effective vaccines or immunotherapies.

SourceWashU Medicine·JournalScience·DateJul 24, 1997

Research Accelerates Toward Faster Personal Computers

Researchers at Purdue University are working on optimizing performance and efficiency in personal computers, enabling applications like more accurate weather predictions and safer cars. A compiler program called POLARIS automatically translates conventional programs to run on parallel processing computers, leading to faster speeds.

How Dry Is The Tropical Free Troposphere? Implications For Global Warming Theory

Recent satellite and in-situ measurements reveal no definitive warming trend in the tropical free troposphere over the past two decades. The low humidity in this region allows more infrared radiation to escape from the Earth, cooling the atmosphere. Current computer models inaccurately handle humidity processes in this region.

SourceNASA/Marshall Space Flight Center--Space Sciences Laboratory·JournalBulletin of the American Meteorological Society·DateJul 14, 1997

Digging For Earthquake Clues In The Hayward Fault

Researchers from USGS, UC Berkeley, LLNL, and PG&E are studying the northern segment of the Hayward fault by excavating 10-foot-deep trenches. They will analyze soil layers, pollen, and carbon-14 to establish past earthquake dates and recurrence intervals. The project aims to inform the updated Bay Area Earthquake Probability Report.

DNA Shows Neandertals Were Not Our Ancestors

A team of researchers found that Neandertal mitochondrial DNA falls outside normal human variation, indicating they did not contribute to the genetic makeup of modern humans. The study also confirms the origins of modern humans in Africa and suggests a divergence of 500,000 to 600,000 years ago.

SourcePenn State·JournalCell·DateJul 10, 1997