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Science News Archive November 2007 - Page 16


Page 16 of 19

For migrating sparrows, kids have a compass, but adults have the map

Researchers at Princeton University discovered that migrating adult sparrows possess an internal navigational map, enabling them to find their way after being thrown off course by thousands of miles. In contrast, juvenile birds, lacking experience, use only a compass to orient themselves southward and struggle to adjust their flight plan.

SourcePrinceton University·JournalProceedings of the National Academy of Sciences·DateNov 5, 2007

Scientists warn that species extinction could reduce productivity of plants on Earth by half

A new analysis shows that as plant species go extinct, natural habitats become less productive and contain fewer total plants. This situation could ultimately compromise the benefits that humans get from nature. The study found that ecosystems with fewer species produce up to 50 percent less plant biomass than those with more natural d...

SourceUniversity of California - Santa Barbara·JournalProceedings of the National Academy of Sciences·DateNov 5, 2007

Gene governs IQ boost from breastfeeding

A study of over 3,000 breastfed infants found that having the FADS2 gene variant increased intelligence by an average of nearly 7 IQ points. The researchers suggest that breastfeeding may account for these differences in intelligence due to the presence of certain fatty acids.

SourceDuke University·JournalProceedings of the National Academy of Sciences·DateNov 5, 2007

A sex-ratio meiotic drive system in Drosophila simulans

Researchers have identified a sex-ratio meiotic drive system in Drosophila simulans, with an X-linked distorter gene that creates skewed female litters and an autosomal suppressor gene that counteracts this effect. The findings provide insights into the molecular mechanisms underlying sex ratio distortion.

SourcePLOS·JournalPLOS Biology·DateNov 5, 2007

Zanzibar's impressive attack on malaria

Research in Zanzibar, Tanzania found a remarkable fall in children dying from malaria, with deaths among the islands' children dropping to a quarter of the previous level. The achievement follows the introduction of improved treatment and the implementation of widespread use of insecticide-treated mosquito nets.

SourcePLOS·JournalPLOS Medicine·DateNov 5, 2007

Maternal alcohol drinking during pregnancy associated with risk for childhood conduct problems

A study analyzing data from over 4,900 mothers found that children whose mothers drank alcohol during pregnancy had increased conduct problems, attention and impulsivity issues. The association remained even after controlling for other variables, suggesting prenatal alcohol exposure may cause childhood conduct problems through environm...

SourceJAMA Network·JournalArchives of General Psychiatry·DateNov 5, 2007

Predicting survival after liver transplantation

Researchers developed a new modified comorbidity index to predict post-liver-transplant survival, considering comorbidities such as coronary disease, diabetes, and COPD. This index predicted survival as well or better than other models using recipient characteristics.

SourceWiley·JournalLiver Transplantation·DateNov 5, 2007

Relationship between environmental stress and cancer elucidated

A recent study elucidates the relationship between environmental stress and cancer by revealing how stress-inducing agents reduce SIRT1 enzyme activity, leading to increased cell survival. By targeting this process, researchers aim to develop new treatments that increase SENP1 activity to promote programmed cell death in cancer cells.

SourceMedical College of Georgia at Augusta University·JournalNature Cell Biology·DateNov 5, 2007

Study examines substance abuse prevalence among teens receiving routine medical care

A study published in Archives of Pediatrics & Adolescent Medicine found that approximately 15% of teens receiving routine outpatient medical care had positive results on a substance abuse screening test. The study highlights the importance of efficient office-based systems for substance abuse screening and therapeutic interventions.

SourceJAMA Network·JournalArchives of Pediatrics and Adolescent Medicine·DateNov 5, 2007

How sweet is it?

A new crop simulation model can predict the timing, quality, and weight of sweet corn crops, addressing seasonal production limitations and perishability issues. The model has significant promise for improving sweet corn production, with potential applications for producers, technical consultants, and the agricultural industry.

SourceAmerican Society for Horticultural Science·JournalJournal of the American Society for Horticultural Science·DateNov 5, 2007

WFU researchers discover new hemoglobin function

A team of researchers from Wake Forest University has discovered a previously undetected chemical process within the oxygen-carrying molecule hemoglobin that converts nitrite salt to the vasodilator nitric oxide. This reaction mechanism could have far-reaching implications for treating cardiovascular diseases.

SourceWake Forest University·JournalNature Chemical Biology·DateNov 4, 2007