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Science News Archive April 2013 - Page 16


Page 16 of 32

New material gets itself into shape

Scientists have created a composite material that can bend and twist in response to external stimuli like temperature or moisture. This programmable plasticity enables the material to take on various shapes, making it suitable for applications such as self-shaping ceramic parts and biodegradable implants.

SourceETH Zurich·JournalNature Communications·DateApr 16, 2013

Stimulating the brain blunts cigarette craving

A new study published in Biological Psychiatry reports that high frequency transcranial magnetic stimulation (TMS) over the prefrontal cortex temporarily reduced cue-induced smoking craving in nicotine-dependent individuals. The treatment, which targets brain function and behavior, showed promise as a potential tool for smoking cessation.

SourceElsevier·JournalBiological Psychiatry·DateApr 16, 2013

When a KISS (1) goes bad

High levels of kisspeptins in aggressive breast cancers increase tumor grade and metastatic potential, according to Western University research. The study suggests that estrogen receptor status may play a role in kisspeptin's unusual behavior, making it a potential diagnostic biomarker for more aggressive breast cancer.

SourceUniversity of Western Ontario·JournalEndocrinology·DateApr 16, 2013

Biodiversity crisis: The impacts of socio-economic pressures on natural floras and faunas

A new study reveals that proportions of threatened species are more closely related to socio-economic pressures from the early 20th century. This 'extinction debt' implies that current conservation efforts may underestimate true extinction risks, as many species may already be destined for extinction due to temporal delays.

SourceUniversity of Vienna·JournalProceedings of the National Academy of Sciences·DateApr 16, 2013

JCI early table of contents for April 15, 2013

Researchers have identified the molecular mechanisms behind two rare diseases: giant axonal neuropathy and ovarian cancer. In GAN, mutations in gigaxonin disrupt neural protein degradation, leading to neurofilament accumulation. Meanwhile, ATP11B facilitates cisplatin resistance in ovarian cancer cells by mediating platinum export.

SourceJCI Journals·JournalJournal of Clinical Investigation·DateApr 15, 2013

Cancer cell metabolism kills

Researchers at the University of Helsinki discovered that the Myc oncoprotein makes cancer cells vulnerable to cell death by activating AMPK, a biochemical sensor. This leads to the activation of tumor suppressor protein p53, which promotes apoptosis in cancer cells.

SourceUniversity of Helsinki·JournalProceedings of the National Academy of Sciences·DateApr 15, 2013

A shortcut to timely, cost-effective interventions for HIV

A mathematical model developed by Yale researchers predicts that combining multiple interventions could prevent up to two-thirds of future HIV infections and reduce prevalence from 19% to 10% in 10 years. The study suggests increasing male circumcision, more frequent screening, and antiretroviral therapy as the most effective strategies.

SourceSpringer·JournalJournal of General Internal Medicine·DateApr 15, 2013

Mammogram tool improves some breast cancer detection but also increases false alarms

A new study found that computer-assisted detection (CAD) in mammograms improves the detection of noninvasive and early-stage invasive breast cancer, but also makes more mistakes. CAD was associated with higher rates of ductal carcinoma in situ (DCIS) diagnoses and increased diagnostic testing among women without breast cancer.

SourceUniversity of California - Davis Health·JournalAnnals of Internal Medicine·DateApr 15, 2013

Surprising findings on hydrogen production in green algae

Researchers at Uppsala University found that green algae can produce hydrogen gas directly from sunlight, with up to 80% of the energy absorbed by Photosystem II going into production. This discovery changes the view on hydrogen production in green algae and offers hope for efficient renewable energy source.

SourceUppsala University·JournalProceedings of the National Academy of Sciences·DateApr 15, 2013

National study of scientist-educators reveals surprises in training, funding

A national study published in PNAS found that US science faculty with education specialties have varying levels of formal training in science education, but are more likely to receive grant money at Ph.D.-granting institutions. Despite this, there is an intriguing disconnect between training and funding outcomes for these faculty members.

SourceSan Francisco State University·JournalProceedings of the National Academy of Sciences·DateApr 15, 2013

Photons run out of loopholes

Researchers from the University of Vienna have closed a loophole for photons, providing definitive experimental proof that quantum particles can exhibit non-classical behavior. The study uses entangled photon pairs and advanced detection technology to rule out possible explanations for previous results.

SourceUniversity of Vienna·JournalNature·DateApr 15, 2013

Fires in Nepal

Nepal and India experience widespread agricultural fires, burning in the April 13, 2013 image from NASA's MODIS satellite. The Moderate Resolution Imaging Spectroradiometer (MODIS) detected actively burning areas, which are outlined in red.

Plant protein puzzle solved

Researchers from North Carolina State University have created a 3D model of an enzyme that links glucose to cellulose, a crucial component of plant cell walls. The breakthrough could enable genetic engineering of plants and trees for improved fibers or wood strength.

SourceNorth Carolina State University·JournalProceedings of the National Academy of Sciences·DateApr 15, 2013

La Jolla Institute's surprising finding could alter the face of dengue vaccine development

Researchers at the La Jolla Institute discovered that T cells contribute to host protection against dengue virus infection, contradicting current scientific understanding. This finding may lead to a new approach in dengue vaccine design, potentially improving its effectiveness against the deadly disease.

SourceLa Jolla Institute for Immunology·JournalProceedings of the National Academy of Sciences·DateApr 15, 2013