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Science News Archive July 2011 - Page 15


Page 15 of 25

The unsolved mystery of kava toxicity

A new review of scientific knowledge on kava reveals no consensus on its toxicity, with various theories including preparation methods and genetic differences. Pacific Island cultures have safely consumed kava for centuries, but Western countries have reported liver damage and banned or regulated kava products.

SourceAmerican Chemical Society·JournalChemical Research in Toxicology·DateJul 13, 2011

The future of cover crops

The study found that self-seeding winter cereal cover crops produced consistent growth using wheat cover crop and mechanical seed dispersal. This technique can lower costs and risks while extending ecological functions of cover crops beyond their normal termination dates.

SourceAmerican Society of Agronomy·JournalAgronomy Journal·DateJul 13, 2011

Talking about faith increases hospital patients' overall satisfaction

A new study found that hospital patients who had conversations about religion and spirituality with their healthcare team were the most satisfied with their overall care. Despite 20% of patients wanting these discussions but not having them, having a conversation led to higher patient satisfaction rates.

SourceSpringer·JournalJournal of General Internal Medicine·DateJul 13, 2011

Higher cigarette taxes don't deter all smokers

A Concordia University study found that higher cigarette taxes prompt low-and middle-income earners to quit smoking, but not wealthier smokers or those in their 20s to 40s. The research team analyzed data from Statistics Canada's National Population Health Survey and found that the middle-aged group is largely unresponsive to taxes.

SourceConcordia University·JournalInternational Journal of Environmental Research and Public Health·DateJul 13, 2011

Stem cell treatment may restore cognitive function in patients with brain cancer

A study published in Cancer Research suggests that stem cell therapy can improve cognitive function in patients with brain cancer who experience radiation-induced learning and memory loss. The treatment involved human neural stem cell transplants, which led to significant improvements in cognitive function compared to control rats.

SourceAmerican Association for Cancer Research·JournalCancer Research·DateJul 13, 2011

Structural factors integral to understanding girls' vulnerability to HIV in sub-Saharan Africa

A new study led by Johns Hopkins researchers found that community members link adolescent girls' increased HIV vulnerability to weak structural support systems. The study's findings highlight the need for policies and interventions to strengthen cultural, economic, educational, and legal structures to protect girls.

SourceJohns Hopkins Bloomberg School of Public Health·JournalSocial Science & Medicine·DateJul 13, 2011

Pitt, Wake Forest team finds why stored transfusion blood may become less safe with age

A team of researchers has discovered that stored transfusion blood can accumulate 'free' hemoglobin and microparticles that react quickly with nitric oxide, leading to blood vessel constriction and hypertension. The findings suggest that a new approach to blood storage may be necessary to prevent complications.

Penn study shows link between immune system suppression and blood vessel formation in tumors

Research from the University of Pennsylvania suggests that ovarian cancer cells secrete chemical signals suppressing the immune system while promoting blood vessel growth. This discovery could lead to more effective cancer treatments by combining therapies targeting angiogenesis with those blocking immunosuppressive T-reg cells.

Fewer aphids in organic crop fields

Researchers found that organic triticale fields had five times as many plant species and 20 times more pollinating insects than conventional fields. The organic fields also had three times as many natural enemies of aphids and five times fewer aphids, highlighting the importance of biodiversity in managing pests.

SourcePensoft Publishers·JournalPLOS ONE·DateJul 13, 2011

New method for making human-based gelatin

Scientists have created a new approach for producing large quantities of human-derived gelatin, potentially replacing up to 300,000 tons of animal-based gelatin. The novel method involves inserting human gelatin genes into yeast, allowing for controllable features and scalability for commercial use.

SourceAmerican Chemical Society·JournalJournal of Agricultural and Food Chemistry·DateJul 13, 2011

Health-care model improves diabetes outcomes, health

A new patient-centered medical home (PCMH) model has shown significant improvement in diabetes management, increasing adherence to evidence-based care guidelines and clinical outcomes. The study found a notable increase in patients receiving essential services such as yearly exams and vaccinations, leading to better health outcomes.

SourcePenn State·JournalThe Joint Commission Journal on Quality and Patient Safety·DateJul 13, 2011

Wind-turbine placement produces tenfold power increase, Caltech researchers say

Researchers at California Institute of Technology have discovered that optimizing wind turbine placement on a given plot of land can increase power output by an order of magnitude. By positioning turbines in close proximity and using vertical-axis wind turbines, the team found that energy loss due to aerodynamic interference between ne...

SourceCalifornia Institute of Technology·JournalJournal of Renewable and Sustainable Energy·DateJul 13, 2011

Penn researchers show single drug and soft environment can increase platelet production

Researchers at the University of Pennsylvania have discovered that a single drug can induce bone marrow cells to quadruple platelet production. The study found that inhibiting myosin-II with the drug belebbistatin increases megakaryocyte growth, allowing them to produce more platelets in a soft environment.

SourceUniversity of Pennsylvania·JournalProceedings of the National Academy of Sciences·DateJul 13, 2011

Large waist doubles risk of kidney disease mortality

A study by Loyola University Health System researcher Holly Kramer found that a large waist circumference doubles the risk of dying among kidney disease patients. Waist circumference was more strongly linked to mortality than BMI, a commonly used measure of obesity.

SourceLoyola Medicine·JournalAmerican Journal of Kidney Diseases·DateJul 13, 2011

Do women have what it takes?

A Northwestern University meta-analysis reveals that leadership continues to be viewed as culturally masculine, perpetuating barriers to women's advancement. The study finds that women are seen as less qualified or natural in leadership roles, and adopting masculine behaviors can lead to being viewed as inappropriate.

SourceNorthwestern University·JournalPsychological Bulletin·DateJul 13, 2011

One-third of central Catalan coast is very vulnerable to storm impact

Researchers at the Polytechnic University of Catalonia developed a method to evaluate coastal storm vulnerability, finding that one-third of the region's coasts are at risk of severe flooding and erosion. The study used wave data from 1958-2008 to assess the vulnerability of a 50-kilometer stretch of coastline.

SourceSpanish Foundation for Science and Technology·JournalNatural Hazards and Earth System Sciences·DateJul 13, 2011