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Science News Archive November 2011 - Page 23


Page 23 of 28

Nonterrestrial artifacts hard to pin down

A pair of postdoctoral researchers at Penn State suggest that we have not looked in enough places to ensure the absence of extraterrestrial artifacts. They used a probabilistic method to determine if sufficient searching has been done, finding it challenging to rule out their presence.

SourcePenn State·JournalActa Astronautica·DateNov 7, 2011

Banning sugar-sweetened beverages in schools does not appear to reduce consumption among adolescents

A study published in Archives of Pediatrics & Adolescent Medicine found that banning all sugar-sweetened beverages in schools reduces in-school access and purchase, but not overall consumption among adolescents. Approximately 85% of students reported consuming sugar-sweetened beverages at least once a week, regardless of policy.

SourceJAMA Network·JournalArchives of Pediatrics and Adolescent Medicine·DateNov 7, 2011

How parasites modify plants to attract insects

Scientists identified a molecule that manipulates plant development to favor insect hosts, increasing leafhopper reproduction and pathogen transmission. This phenomenon demonstrates the extended phenotype, where an organism's impact on its environment extends beyond biological processes.

SourceNorwich BioScience Institutes·JournalProceedings of the National Academy of Sciences·DateNov 7, 2011

Breakthrough scientific discoveries no longer dominated by the very young, study finds

A study of Nobel Laureates from 1901 to 2008 found that the majority of breakthroughs in chemistry and physics were made after age 40, with great achievements by age 30 nearly never occurring. The trend toward youthful achievement in early 20th century physics may be attributed to the development of quantum mechanics.

SourceOhio State University·JournalProceedings of the National Academy of Sciences·DateNov 7, 2011

NIH study finds stroke risk factors may lead to cognitive problems

A recent study by the National Institutes of Health has discovered a correlation between high blood pressure and stroke risk factors with cognitive impairment. The research, which followed over 30,000 participants, found that age, left ventricular hypertrophy, and high blood pressure were independent predictors of cognitive decline.

JCI online early table of contents: Nov. 7, 2011

Researchers have discovered that connexin 36 protects mouse pancreatic beta-cells against immune molecules prevalent in type 1 diabetes. Additionally, a study found that PTHrP drives breast tumor initiation, progression, and metastasis in mice, suggesting it as a potential therapy target.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateNov 7, 2011

Why cooking counts

A study by Harvard researchers found that cooked meat delivers more energy than raw meat, contradicting current food labeling. This discovery supports the idea that cooking allowed early humans to extract more energy from their diet, contributing to evolutionary adaptations such as increased brain size and long-distance running ability.

SourceHarvard University·JournalProceedings of the National Academy of Sciences·DateNov 7, 2011

Prostate cancer surgery better at teaching hospitals

A recent study published in the Journal of Urology found that prostate cancer patients who undergo radical prostatectomy experience fewer complications and shorter hospital stays at teaching hospitals compared to non-academic institutions. The study suggests that the characteristics of teaching hospitals, including higher subspecialty ...

SourceHenry Ford Health·JournalThe Journal of Urology·DateNov 7, 2011

Model of enzyme's structure could spur new therapies

Researchers at Brown University have created an unprecedentedly detailed description of a kinase complex, which could lead to new therapeutic drugs for diseases such as Alzheimer's and cancer. The team discovered a unique binding site, called KIS, that plays a crucial role in the complex's formation.

SourceBrown University·JournalNature Chemical Biology·DateNov 6, 2011

ICRISAT-led team cracks pigeonpea genome

The ICRISAT-led team has completed the genome sequence of pigeonpea, a legume crop grown by millions of poor farmers worldwide. With this breakthrough, scientists can now identify genes for drought tolerance and improve crop productivity, tackling pests and disease constraints in production.

SourceBGI Shenzhen·JournalNature Biotechnology·DateNov 6, 2011

Process important to brain development studied in detail

Researchers at Uppsala University have examined the mechanism of gene transcription and found that genes active in the brain are transcribed with a special mechanism. During fetal development, there is a larger proportion of RNA molecules containing introns compared to fully developed brains.

SourceUppsala University·JournalNature Structural & Molecular Biology·DateNov 6, 2011

Metabolic protein plays unexpected role in tumor cell formation and growth

A team of researchers at the University of Texas MD Anderson Cancer Center found that pyruvate kinase M2 (PKM2) has an unexpected role in regulating cell proliferation and tumor formation in brain cancer. PKM2's ability to bind to beta-catenin in the cell nucleus is essential for its function, and its levels are correlated with brain t...

More promising natural gas storage?

Researchers at Northwestern University have developed a computational method to quickly identify metal-organic frameworks (MOFs) with high potential for natural gas storage. The new algorithm rapidly generates and tests hypothetical MOFs, leading to the discovery of over 300 promising structures.

SourceNorthwestern University·JournalNature Chemistry·DateNov 6, 2011

Birth cohort screening for hepatitis C is cost effective, could save thousands of lives each year

A study published in Annals of Internal Medicine finds that proactive screening for hepatitis C among the birth cohort (1945-1965) is cost-effective and can identify over 800,000 currently unidentified cases. This strategy could save thousands of lives each year compared to current case identification methods.

SourceAmerican College of Physicians·JournalAnnals of Internal Medicine·DateNov 4, 2011

Not 1, not 2, not 3, but 4 clones!

Researchers have developed a theory for a quantum cloning machine that can produce four approximate copies of an initial quantum state, overcoming previous limitations to two or three copies. This advancement has significant implications for message encryption systems and analyzing security using shared secret quantum keys.

SourceSpringer·JournalThe European Physical Journal D·DateNov 4, 2011

Raises and cuts in public sector salaries have a direct effect on the private sector

A study by the Bank of Spain and Pablo de Olavide University found that public sector salary changes directly affect the private sector. The researchers analyzed data from four EU countries, including Italy, Spain, Germany, and France, to determine the extent of this influence. They also highlighted the role of institutional design, su...

SourceSpanish Foundation for Science and Technology·JournalEmpirical Economics·DateNov 4, 2011

Nitrogen fertilizers' impact on lawn soils

Researchers measured gaseous nitrogen emissions in US lawns, finding denitrification removes excess nitrogen. Nitrogen removals were equivalent to 15% of annual fertilizer inputs, with most retained in lawn soils. The study's results are encouraging but highlight the need for further work on optimal soil management conditions.

SourceAmerican Society of Agronomy·JournalJournal of Environmental Quality·DateNov 4, 2011

Unique bipolar compounds enhance functionality of organic electronics

University of Toronto researchers identify a new class of compounds with phthalimido molecular fragments, exhibiting unique electro-chemical properties. These compounds have the potential to execute all three tasks needed for a functional organic solar cell, including absorbing light, moving electrons and transporting holes.

SourceUniversity of Toronto Faculty of Applied Science & Engineering·JournalACS Applied Materials & Interfaces·DateNov 4, 2011