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Science News for March 9, 2000


Resolving mathematical mystery of turbulence a mission for Alexandre Chorin

Alexandre Chorin, a renowned mathematician, is working on a new method of optimal prediction that could contribute to solving the turbulence problem. His work incorporates contributions from collaborators and aims to tackle the complex multi-dimensional problem that defies current computing power.

SourceDOE/Lawrence Berkeley National Laboratory·DateMar 9, 2000

NC State scientists confirm second toxic pfiesteria species

Researchers have confirmed a new, genetically distinct species of Pfiesteria that thrives in waters with high levels of nitrogen, posing risks to fish and potentially human health. The discovery brings the total number of toxic Pfiesteria species to two, shedding light on their life cycles and behaviors.

SourceNorth Carolina State University·DateMar 9, 2000
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Cancer 'brake' keeps growth in check

Researchers have identified a protein, Chk2, that activates the tumor suppressor gene p53 to prevent damaged DNA from causing cancer. In Chk2-deficient cells, the brakes on proliferation are released, allowing cancerous cell growth.

SourceHoward Hughes Medical Institute·JournalScience·DateMar 9, 2000

Health of residents in nursing homes at risk due to understaffing

Current data shows that nursing homes with low nurse staff levels have a greater incidence of health problems among older adults. The authors recommend minimum staffing standards to improve care, including higher registered nurse-to-resident ratios and additional education and training.

SourceNew York University Division of Nursing·JournalThe Gerontologist·DateMar 9, 2000

Protein switch controls proliferation of hematopoietic stem cells

Researchers at Massachusetts General Hospital have identified a molecular switch, the protein p21, that controls the development and proliferation of hematopoietic stem cells. The discovery may solve a major limitation to using these stem cells in transplants and gene therapies.

SourceMassachusetts General Hospital·JournalScience·DateMar 9, 2000

Do US ecosystems balance US fossil fuel use?

Researchers modeled US ecosystem carbon budget using state-of-the-art data and models, finding small uptake of carbon despite high emissions. The results suggest that ecosystems in the US store carbon, but not enough to balance fossil fuel use, making other regions important for climate change mitigation.

SourceMax-Planck-Gesellschaft·JournalScience·DateMar 9, 2000
AmScope B120C-5M Compound Microscope

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Air pollution can prevent rainfall, reported in the 10 March 2000 issue ofScience

A recent study published in Science reveals that urban and industrial air pollution can suppress rainfall and snowfall by creating clouds with abnormally small water droplets. This phenomenon occurs when pollution particles act as 'seeding' sites, preventing cloud moisture from condensing into raindrops and ice crystals.

SourceAmerican Association for the Advancement of Science (AAAS)·JournalScience·DateMar 9, 2000

100th Meeting of the American Society for Microbiology

The 100th meeting of the American Society for Microbiology brought together experts in the field to share groundbreaking research on various microbiological topics. Key findings included significant progress in understanding microbial mechanisms and developing new diagnostic tools.

SourceAmerican Society for Microbiology·DateMar 9, 2000

Colorado State and international scientists say loss in biodiversity by year 2100 could be consequence of global changes

A study led by Colorado State University scientists reveals that human-caused global changes, such as land-use change and nitrogen deposition, are expected to drive biodiversity loss between now and 2100. The research identifies five primary drivers of global change and assesses their impact on terrestrial and freshwater ecosystems.

SourceColorado State University·JournalScience·DateMar 9, 2000

Simple change in mechanical ventilator cuts deaths by more than 20 percent

A nationwide clinical trial found that reducing tidal volumes in mechanical ventilation can cut mortality from Acute Respiratory Distress Syndrome (ARDS) by up to 22%. The study, involving 861 patients and coordinated at Massachusetts General Hospital, used a new technique with smaller oxygen puffs to provide breathing assistance.

SourceUniversity of California - San Francisco·JournalNew England Journal of Medicine·DateMar 9, 2000
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