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Science News Archive March 2005 - Page 7


Page 7 of 15

Specialist care gives better rate of survival

Regular cardiovascular follow-up visits with a specialist significantly improve outcomes for heart failure patients, reducing emergency room visits and mortality rates. Access to specialty care is particularly important for elderly and rural patients, who often face barriers to timely treatment.

SourceUniversity of Alberta·JournalCanadian Medical Association Journal·DateMar 16, 2005

U-M team makes synthetic mother of pearl

Researchers at the University of Michigan have successfully created an artificial version of mother of pearl, a naturally occurring compound that is several times stronger than nylon. By layering molecules on top of each other, scientists can engineer the mechanical properties of the material to suit specific applications.

Men and women: The differences are in the genes

A recent study published in Nature found that genes on the inactive X chromosome can escape inactivation and be expressed in females, leading to a stronger overall concentration of particular genes. This discovery could explain some of the differences between men and women that aren't attributable to sex hormones.

SourcePenn State·JournalNature·DateMar 16, 2005

New factor affects fertility

Research reveals that mice lacking TAF4b initially exhibit fertility but later become infertile due to progressive loss of maturing germ cells. The study's findings highlight the crucial role of TAF4b in sperm production and may have implications for human male fertility.

SourceBaylor College of Medicine·JournalGenes & Development·DateMar 16, 2005

Brain imaging study may hold clues to onset of schizophrenia in people at high risk

A recent brain imaging study found that individuals at high risk for schizophrenia show altered neural activity in the prefrontal cortex, suggesting biological changes prior to disease onset. The study used fMRI scans to identify potential biomarkers of vulnerability, which could aid in early intervention and treatment.

SourceUniversity of North Carolina Health Care·JournalArchives of General Psychiatry·DateMar 16, 2005

Teenage highs and lows

A study of over 13,700 US school students found that those involved in substance use, delinquency, and school problems were at high risk for continued marijuana use. The study identified five stages of marijuana involvement and recommended targeting these areas for prevention efforts.

SourceCardiff University·JournalArchives of General Psychiatry·DateMar 16, 2005

US life expectancy about to decline, researchers say

A recent study suggests that obesity may be overestimating Social Security forecasts, with a potential decline in life expectancy of four to nine months. The researchers attribute this effect to the growing obesity epidemic, particularly among children and teenagers, which could lead to increased mortality rates and healthcare costs.

SourceUniversity of Illinois Chicago·JournalNew England Journal of Medicine·DateMar 16, 2005

Answer from 'dusty shelf' aids quest to see matter as it was just after big bang

Researchers dust off dusty shelf by applying Hanbury Brown-Twiss Interferometry to high-energy gold nucleus collisions, reconciling experimental data with theoretical expectations. They found that pions in the plasma have a low mass inside but a higher mass outside, helping create quark-gluon plasma conditions similar to those just aft...

SourceUniversity of Washington·JournalPhysical Review Letters·DateMar 15, 2005

Study shows risk of cardiac death after radiation for breast cancer has dramatically decreased

A recent study found that advancements in radiation techniques have greatly reduced the risk of cardiac death after radiation therapy for breast cancer. Women with left-sided breast cancer had a higher mortality rate from ischemic heart disease compared to those with right-sided breast cancer, but this difference decreased over time.

SourceUniversity of Texas M. D. Anderson Cancer Center·JournalJNCI Journal of the National Cancer Institute·DateMar 15, 2005

Plan to protect soybean crop is ready

A comprehensive plan has been developed by Virginia Tech to minimize losses from Soybean Rust, a disease that severely affected Brazilian soybeans. The plan includes educational programs and a monitoring system to identify the disease, as well as guidelines for scouting and treating infected fields.

Determining the fate of cells in the human body

The study found that Twist1 and Hand2 proteins couple to determine the number of digits on a hand, paw or wing, and whether these digits are webbed or not. Additionally, the researchers identified high-frequency mutations in patients with Saethre-Chotzen Syndrome, which may lead to cardiac and placental tissue defects.

SourceIndiana University·JournalNature Genetics·DateMar 15, 2005

Researchers discover chemical compounds that affect plant growth

A team of researchers has identified 219 chemicals that affect plant growth due to gravity, leading to a better understanding of protein transportation and genetic signaling in plant cellular membranes. The discovery uses chemical genomics to study the link between endomembrane system components and gravitropic response.

SourceUniversity of California - Riverside·JournalProceedings of the National Academy of Sciences·DateMar 15, 2005

New ways to design safer & more effective topical (transdermal) drug delivery announced in the PNAS

Researchers at UC Santa Barbara have engineered over 300 new chemical penetration enhancers (CPEs) to improve the safety and efficacy of topical drug delivery. The new CPEs were designed using computer-aided modeling, allowing for the prediction of skin penetrability and potential irritation.

SourceUniversity of California - Santa Barbara·JournalProceedings of the National Academy of Sciences·DateMar 15, 2005

Antiretroviral therapy may prevent excess risk of some cancers in people with HIV

A study analyzed data from over 7,300 people infected with HIV and found that HAART treatment can lower the risk of Kaposi sarcoma and non-Hodgkin lymphoma. However, no significant reduction in risk was observed for other types of cancer. Smoking is a major risk factor for lung cancer among people with HIV.

SourceJournal of the National Cancer Institute·JournalJNCI Journal of the National Cancer Institute·DateMar 15, 2005