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Science News Archive 2009 - Page 31


Page 31 of 277

Extinct moa rewrites New Zealand's history

Scientists reconstructed New Zealand's geological history using the first complete genetic history of the moa, revealing a history of marine barriers, mountain building, and glacial cycles over millions of years. The study also suggests that many iconic species evolved solely on the South Island.

SourceUniversity of Adelaide·JournalProceedings of the National Academy of Sciences·DateNov 17, 2009

Newer heart devices significantly improve survival, complication rate and quality of life

A new generation of implanted devices has shown astounding improvements in survival, quality of life, reduced complications, and device durability in patients with heart failure. The newer devices have a higher success rate, allowing patients to walk longer distances and improving their overall well-being.

SourceUniversity of Louisville Health Sciences Center·JournalNew England Journal of Medicine·DateNov 17, 2009

Studies suggest males have more personality

Studies across various species reveal that males tend to exhibit more predictable behavior, particularly in parental care, aggression, and risk-taking. Females, on the other hand, are more likely to vary their behavior and respond to these traits, indicating a preference for mates with consistent personalities.

SourceUniversity of Exeter·JournalBiological Reviews·DateNov 17, 2009

'No muss, no fuss' miniaturized analysis for complex samples developed

NIST researchers have developed a novel method for analyzing complex samples with minimal sample preparation, using Gradient Elution Moving Boundary Electrophoresis (GEMBE) in microfluidic devices. This technique enables the separation of components from solutions containing particulates or other contaminating materials.

Watching Lyme disease-causing microbes move in ticks

Scientists at the University of Connecticut Health Center have visualized the movement of Lyme disease-causing microbes within feeding ticks. The study found that these microbes undergo a biphasic mode of dissemination, first forming networks of nonmotile organisms and then becoming motile invasive organisms.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateNov 16, 2009

Protecting the future: How plant stem cells guard against genetic damage

Research by Nick Fulcher and Robert Sablowski found that plant stem cells are sensitive to DNA damage and can detect defects, triggering cell death to prevent them from being passed on. This mechanism helps protect plants against genetic damage caused by environmental stresses such as drought, high salinity, and hazardous chemicals.

SourceNorwich BioScience Institutes·JournalProceedings of the National Academy of Sciences·DateNov 16, 2009

Unrealistic optimism prompts risky behavior

Research on 800 college students found that those with smaller drinking problem chances were more likely to experience problems, contrary to the idea that optimism motivates health care. The study suggests that unrealistic optimism may actually curb risky health behaviors.

SourceSAGE·JournalPersonality and Social Psychology Bulletin·DateNov 16, 2009

Women suffering sudden cardiac arrest have lower prevalence of structural heart disease than men

A new study published in the Journal of the American College of Cardiology found that women are less likely to exhibit signs of structural heart disease, which is a precursor to fatal cardiac arrest. This means that fewer women may be eligible for current treatments that can prevent sudden cardiac arrest.

SourceCedars-Sinai Medical Center·JournalJournal of the American College of Cardiology·DateNov 16, 2009

First ever large-scale study of ketamine users published

A large-scale study of ketamine users found that heavy users experienced impaired verbal memory, forgetfulness, and difficulty recalling conversations. The study also revealed that occasional ketamine use does not lead to prolonged harms to cognitive function, but frequent use can have negative effects.

SourceWiley·JournalAddiction·DateNov 16, 2009

Glimpsing a greener future

A University of California, Irvine computer model forecasts improved air quality in the Greater Los Angeles area if 75% of drivers switch to hydrogen fuel cell vehicles by 2060. The model suggests a 60% reduction in greenhouse gas emissions and lower levels of soot and ozone.

SourceUniversity of California - Irvine·JournalEnvironmental Science & Technology·DateNov 16, 2009

Study shows link between influenza virus and fever

A study by University of Bonn researchers has found a link between the influenza virus and fever, revealing that the immune system's RIG-I protein plays a key role in triggering high temperatures. This discovery could lead to new therapeutic strategies for treating severe viral infections.

SourceUniversity of Bonn·JournalNature Immunology·DateNov 16, 2009

Embargoed news from Annals of Internal Medicine

The US Preventive Services Task Force now recommends against routine breast cancer screening for women under 50 due to insufficient evidence. However, women between 40-49 at high risk should discuss biennial mammography with their doctor. The task force also suggests changing the screening interval from one year to two until age 74.

SourceAmerican College of Physicians·JournalAnnals of Internal Medicine·DateNov 16, 2009