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Science News for May 2, 2006


Nice guys do finish first in lizards' evolutionary race, says MSU professor

A study on side-blotched lizards found that cooperating males pass on their genes through a trait known as the 'greenbeard,' despite personal costs. The researchers identified three throat colors and behaviors that follow 'rock-paper-scissors' cycles, showcasing how cooperation can be beneficial in evolutionary terms.

SourceMichigan State University·JournalProceedings of the National Academy of Sciences·DateMay 2, 2006

Diuretic may not be best way to reduce CHF water retention

A new study suggests that lixivaptan, a drug blocking vasopressin, is as effective as diuretics in reducing fluid retention in patients with congestive heart failure while also retaining proper sodium levels. The drug may offer an alternative treatment for heart failure patients and help clarify the role of vasopressin in water retention.

SourceOhio State University Wexner Medical Center·JournalJournal of the American College of Cardiology·DateMay 2, 2006

Sentinel lymph node biopsy associated with better quality of life in breast cancer patients

A study published in the Journal of the National Cancer Institute found that sentinel lymph node biopsy resulted in better arm function, improved quality of life, and faster recovery times compared to standard axillary lymph node dissection. Women who underwent sentinel lymph node biopsy had a low recurrence rate and equivalent surviva...

SourceJournal of the National Cancer Institute·JournalJNCI Journal of the National Cancer Institute·DateMay 2, 2006

Why mice don't get cancer of the retina

Researchers found that in mice, proteins Rb and p107 compensate for each other in retinal progenitor cells, preventing deregulated proliferation that leads to retinoblastoma. In contrast, humans lack these compensatory mechanisms due to the main protein RB1, leading to retinoblastoma.

SourceBMC (BioMed Central)·JournalBMC Biology·DateMay 2, 2006

Incarcerated women more likely to use birth control when given in jail

A study found that incarcerated women are 14 times more likely to start using birth control when it's offered in prison. This suggests that easy access to contraceptives can empower women and prevent high-risk pregnancies. Despite this, barriers remain, including lack of insurance and housing after release.

SourceLifespan·JournalAmerican Journal of Public Health·DateMay 2, 2006

Americans less healthy than English

A study comparing health outcomes in US and English citizens reveals that Americans are much sicker than their English counterparts. The SES-health gradient appears equally strong in both self-reports and biological measures of health.

SourceJAMA Network·JournalJAMA·DateMay 2, 2006

White House honors America's best

The US National Science Foundation recognized 100 exceptional middle and high school teachers with the 2005 Presidential Award for Excellence in Mathematics and Science Teaching. These educators are praised for their focus on student learning, creative approaches to teaching, and ability to make complex concepts relevant to everyday life.

Nanotubes act as 'thermal velcro' to reduce computer-chip heating

Researchers at Purdue University have developed thermal interface materials with carbon nanotubes that conduct heat more efficiently than conventional materials. The nanotube-based interfaces can reduce the temperature rise of computer chips by up to 5 degrees Celsius, improving overall performance and reducing the risk of damage.

SourcePurdue University·JournalInternational Journal of Heat and Mass Transfer·DateMay 2, 2006

Fear of 'cooties' keeps shoppers from the till — study

A study found that consumers are less likely to buy a product if they believe it has been touched by someone else, with the value of the product being perceived as diminished. The researchers determined that disgust is the underlying reason for this phenomenon, and that its level increases with the perception of touch or use.

SourceUniversity of Alberta·JournalJournal of Marketing·DateMay 2, 2006

Learning the language of DNA

The study reveals that genes use a broad distribution of start sites, allowing for subtle differences in species control. This knowledge could help explain why complex organisms like humans have more genes than simple ones despite similar numbers.

SourceResearch Australia·JournalNature Genetics·DateMay 2, 2006

Study results offer guidance in treatment

The largest clinical trial on pharmacologic and behavioral treatments for alcohol dependence shows that medication treatment significantly improves outcomes compared to placebo. The study also provides new safety data on prescription drugs naltrexone and acamprosate, suggesting a high degree of comfort for prescribing physicians.

SourceScripps Research Institute·JournalJAMA·DateMay 2, 2006

Other highlights in the May 3 JNCI

Researchers found that only 75% of studies met basic criteria for evaluation, highlighting the need for improved reporting in clinical trials. Meanwhile, a lung cancer risk model was found to underestimate actual rates over a 10-year period, while an enzyme-based approach shows promise in killing glioma cells.

SourceJournal of the National Cancer Institute·JournalJNCI Journal of the National Cancer Institute·DateMay 2, 2006