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Science News for July 16, 2014


Indus river dolphin's declining range

The Indus river dolphin's historical range has been fragmented into 17 river sections due to diversion dams, with dolphins disappearing from ten sections. Low dry-season river discharge caused by irrigation is the primary factor contributing to the decline.

SourcePLOS·JournalPLOS ONE·DateJul 16, 2014

MedDiet has varied effects on cognitive decline among different races -- Ben-Gurion University researcher

A new study published in the Journal of Gerontology found that the Mediterranean diet has a significant correlation with slower cognitive decline among African American older adults, but not white older adults. The study suggests that further research is needed to confirm this association and understand the underlying factors.

Decoding dengue

Scientists discovered a new pathway the dengue virus takes to suppress the human immune system, deepening understanding of the virus and its potential for more effective treatments. The study reveals how sfRNA interacts with proteins in the cell to evade antiviral defenses.

SourceDuke-NUS Medical School·JournalPLOS Pathogens·DateJul 16, 2014

One injection stops diabetes in its tracks

A single injection of FGF1 protein restores blood sugar levels to a healthy range for over two days, reversing insulin insensitivity and the underlying cause of diabetes. This breakthrough discovery offers a new method to control glucose with a safer and more effective treatment.

SourceSalk Institute·JournalNature·DateJul 16, 2014

Cell membrane proteins give up their secrets

Researchers have developed a method to predict membrane protein folding using energy landscape theory, increasing the technique's value to disease and drug research. The study successfully determined that thermodynamic funnels hold the upper hand in folding proteins inside a membrane, similar to globular proteins.

SourceRice University·JournalProceedings of the National Academy of Sciences·DateJul 16, 2014

Poor sleep quality linked to lower physical activity in people with PTSD

A new study reveals that individuals with post-traumatic stress disorder (PTSD) who experience poor sleep quality are more likely to exhibit lower physical activity. The research, published in the Journal of Clinical Sleep Medicine, suggests a potential behavioral pathway from disturbed sleep to negative health outcomes such as obesity.

SourceAmerican Academy of Sleep Medicine·JournalJournal of Clinical Sleep Medicine·DateJul 16, 2014

Research connects pregnancy loss and cardiovascular disease

A recent study analyzing data from 77,701 women found that those who experienced a history of miscarriage or stillbirth had a higher risk of coronary heart disease later in adulthood. Women with two or more miscarriages were found to have an odds ratio of 1.18 for coronary heart disease compared to those with no miscarriages.

SourceCare New England·JournalThe Annals of Family Medicine·DateJul 16, 2014

Live kidney donors face 'pointless' insurance troubles

A new study by Johns Hopkins researchers found that healthy living kidney donors often face pointless insurance hurdles after donation. Despite being heavily screened before approval, these donors are frequently denied or charged higher premiums for life insurance, highlighting the need for better support systems.

SourceJohns Hopkins Medicine·JournalAmerican Journal of Transplantation·DateJul 16, 2014

No-wait data centers

A new network-management system, Fastpass, can reduce average queue length of routers in a Facebook data center by 99.6 percent and shrink latency nearly as much. By using a central server called an arbiter, the system efficiently assigns transmission times to nodes in the network.

Improving tumor radiation therapy: When basic ions break DNA down

Scientists have discovered new fragmentation pathways that occur universally when DNA strands are exposed to metal ions, leading to the creation of charged intermediates. This finding could contribute to optimizing cancerous tumour therapy by improving understanding of how radiation interacts with complex DNA structures.

SourceSpringer·JournalThe European Physical Journal D·DateJul 16, 2014

Study: Smoking may contribute to suicide risk

A study published in Nicotine & Tobacco Research found that cigarette smokers are more likely to commit suicide than non-smokers. Implementing higher taxes on cigarettes and stricter smoking policies led to a 15% decline in suicide rates relative to the national average.

SourceWashU Medicine·JournalNicotine & Tobacco Research·DateJul 16, 2014

Borneo deforested 30 percent over past 40 years

Forest cover in Borneo declined by up to 30% between 1973 and 2010, with logging and fire contributing to the loss. The study analyzed LANDSAT satellite images to understand long-term forest change patterns, aiming to aid conservation planning.

SourcePLOS·JournalPLOS ONE·DateJul 16, 2014

New view of Rainier's volcanic plumbing

Scientists have created a detailed picture of Mount Rainier's deep volcanic plumbing, revealing a partly molten rock reservoir approximately 30 percent molten. The study used both seismic imaging and magnetotelluric measurements to capture the melting process that feeds magma into the crustal reservoir.

SourceUniversity of Utah·JournalNature·DateJul 16, 2014

NIH scientists identify gene linked to fatal inflammatory disease in children

Researchers have identified a gene linked to STING-associated vasculopathy with onset in infancy (SAVI), a devastating autoinflammatory condition. Repurposed drugs, such as tofacitinib and ruxolitinib, show therapeutic potential in laboratory studies and are currently being studied in children with the disease.

Efficient structures help build a sustainable future

The study reveals that steel cable structures have a significantly lower environmental impact, with 29% less mass and 65.1% less embodied energy than traditional truss systems. This finding highlights the importance of material selection in reducing construction's environmental damage.

SourceUniversity of Miami·JournalJournal of Architectural Engineering·DateJul 16, 2014

Recommendations prioritize strategies to prevent ventilator-associated pneumonia

The new document highlights basic prevention strategies for adult patients, including avoiding intubation and minimizing sedation. For pediatric and neonatal patients, the guidance emphasizes regular oral care and elevating the head of the bed to reduce the risk of ventilator-associated pneumonia.

SourceSociety for Healthcare Epidemiology of America·JournalInfection Control and Hospital Epidemiology·DateJul 16, 2014

Tooth plaque provides insight into our prehistoric ancestors' diet

A new study reveals that prehistoric humans consumed purple nut sedge for at least 7,000 years, demonstrating their understanding of nutritional and medicinal properties. The analysis of dental calculus from ancient human teeth found evidence of cooking, plant processing, and the use of this plant as a food source.

SourcePLOS·JournalPLOS ONE·DateJul 16, 2014

Screening costs increased in older women without changing detection rates of ESBC

A new study published in JNCI: Journal of the National Cancer Institute found that breast cancer screening costs increased substantially among older women between 2001 and 2009, despite unchanged detection rates of early-stage tumors. The study analyzed data from the SEER-Medicare linked database and found a significant increase in scr...

SourceOxford University Press USA·JournalJNCI Journal of the National Cancer Institute·DateJul 16, 2014

Whale shark fringe migration

A 16-year study reveals that the Azore islands are becoming a crucial part of the Atlantic whale shark's habitat due to rising ocean temperatures. The researchers found that increased sightings were correlated with higher water temperatures and seafloor features, such as slopes and seamounts.

SourcePLOS·JournalPLOS ONE·DateJul 16, 2014

Expert guidance on hand hygiene in healthcare settings

The guidance emphasizes best practices for implementing and optimizing hand hygiene programs, including using soap and alcohol-based hand rubs, stressin' hand hygiene at critical moments, and empowering healthcare personnel. The updated evidence-based recommendations aim to clarify the state of the science behind recommended hand hygie...

SourceSociety for Healthcare Epidemiology of America·JournalInfection Control and Hospital Epidemiology·DateJul 16, 2014

Dispersant from Deepwater Horizon spill found to persist in the environment

A new study has found that the dispersant compound DOSS, used in the Deepwater Horizon spill, persists in the environment for up to four years, remaining associated with oil and affecting marine ecosystems. The persistence of DOSS in deep-sea sediments, corals, and sand patties on Gulf beaches indicates a need for further research into...

SourceWoods Hole Oceanographic Institution·JournalEnvironmental Science & Technology Letters·DateJul 16, 2014

Scientists find way to trap, kill malaria parasite

Researchers at Washington University School of Medicine have discovered a potential target for malaria drug development by identifying a key protein involved in the parasite's protein secretion process. Disrupting this protein, heat shock protein 101 (HSP101), prevents the parasite from secreting its proteins into the red blood cell.

SourceWashU Medicine·JournalNature·DateJul 16, 2014

Potassium supplements may increase survival in patients taking diuretics for heart failure

Researchers found that adding potassium supplementation to loop diuretics increases survival rates by 16 percent in patients receiving at least 40 mg/day of furosemide. The benefit is more pronounced with higher diuretic doses. While the study's findings are promising, further independent studies are needed to confirm these results.

Fair cake cutting gets its own algorithm

Mathematician Julius Barbanel and political scientist Steven Brams developed an algorithm to divide goods like cake and land between two people, ensuring equal pieces and no envy. The cut-and-choose method uses probability density functions to determine portions, making it efficient, equitable, and jealousy-free.

SourceSpringer Science+Business Media·JournalThe Mathematical Intelligencer·DateJul 16, 2014

Marginal life expectancy benefit from contralateral prophylactic mastectomy

A recent study published in JNCI: Journal of the National Cancer Institute found that contralateral prophylactic mastectomy (CPM) may confer only a marginal life expectancy benefit depending on the type and stage of cancer. The procedure was more beneficial for younger women and those with stage I and ER-negative breast cancer.

SourceOxford University Press USA·JournalJNCI Journal of the National Cancer Institute·DateJul 16, 2014

Does practice really make perfect?

A meta-analysis of 88 studies on deliberate practice found that it explains 26% of the variance in performance for games, 21% for music, and 18% for sports. While practice improves performance, other personal factors also play a role in predicting success.

SourceRice University·JournalPsychological Science·DateJul 16, 2014

When it comes to food, obese women's learning is impaired

A study by Yale University researchers found that obese women were impaired in learning associations between food cues and rewards, but normal-weight individuals and men did not show the same impairment. This suggests a specific behavioral intervention targeting food-specific learning impairments may be effective in treating obesity.

SourceYale University·JournalCurrent Biology·DateJul 16, 2014