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The premier online source for science news since 1996. A service of the American Association for the Advancement of Science.
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Meta-analysis evaluates the effect of post-primary PCI Bivalirudin I

Lun, 08/14/2017 - 22:00
A study has examined the efficacies of various post-percutaneous coronary intervention (PCI) bivalirudin doses on net adverse clinical events (NACEs) and mortality.

Scientists identify gene that controls immune response to chronic viral infections

Lun, 08/14/2017 - 22:00
Researchers from the University of Chicago identify a gene that helps some people and animals fend off persistent viral infections.

Evolved masculine and feminine behaviors can be inherited from social environment

Lun, 08/14/2017 - 22:00
The different ways men and women behave, passed down from generation to generation, can be inherited from our social environment -- not just from genes, experts have suggested.

Nanotechnology gives green energy a green color

Lun, 08/14/2017 - 22:00
Solar panels have tremendous potential to provide affordable renewable energy, but many people see traditional black and blue panels as eyesores. Architects, homeowners and city planners may be more open to the technology if they could install colorful, efficient solar panels, and a new study in Applied Physics Letters brings us one step closer. Researchers have developed a method for imprinting existing solar panels with silicon nanopatterns that scatter green light back toward an observer.

New thruster design increases efficiency for future spaceflight

Lun, 08/14/2017 - 22:00
Hall thrusters are used in earth-orbiting satellites and show promise to propel robotic spacecraft long distances, and the plasma ejected from the exhaust end of the thruster can deliver great speeds. Cylindrical Hall thrusters lend themselves to miniaturization and have a smaller surface-to-volume ratio that prevents erosion of the thruster channel. Investigators in China have developed a new design for CHTs that significantly increases thrust; they report their work in this week's Physics of Plasmas.

How decision-making habits influence the breast cancer treatments women consider

Lun, 08/14/2017 - 22:00
A new study finds that more than half of women with early stage breast cancer considered an aggressive type of surgery to remove both breasts. The way women generally approach big decisions, combined with their values, impacts what breast cancer treatment they consider, the study also found.

Chewing gum rapid test for inflammation

Lun, 08/14/2017 - 22:00
A research team from the University of Würzburg presents this novelty in the journal Nature Communications.

How a nutrient, glutamine, can control gene programs in cells

Lun, 08/14/2017 - 22:00
Researchers show that an intracellular metabolite of glutamine, alpha-ketoglutarate, plays a role in regulating cellular differentiation programs by changing the DNA-binding patterns of the transcription factor CTCF and by altering genome interactions. As an added level of gene program control complexity, they have found that the genome's context near the binding sites -- such as epigenetic changes or altered genome topology -- affects whether the binding turns on or turns off gene programs.

Changes to high-risk medical devices often supported by low-quality research

Lun, 08/14/2017 - 22:00
Clinical trials that test changes in the design or use of high-risk medical devices are often poorly designed, and can rely on inadequate or potentially biased data, according to a new study by researchers at the UC San Francisco and Yale School of Medicine.

California demand for primary care providers to exceed supply by 2030

Lun, 08/14/2017 - 22:00
California is expected to face a statewide shortfall of primary care providers in the next 15 years, with acute shortages in the Central Valley, Central Coast and Southern Border areas, due to the uneven distribution of care across the state, according to a report released Aug. 15, 2017, by Healthforce Center at UCSF.

Intensive lifestyle intervention provides modest improvement in glycemic control, reduced need for medication

Lun, 08/14/2017 - 22:00
A high amount and intensity of exercise along with a diet plan resulted in a modest reduction in blood glucose levels among adults with type 2 diabetes, but was accompanied by reductions in the use of glucose-lowering medications, according to a study published by JAMA.

Lower-quality studies often used to support changes to high-risk medical devices

Lun, 08/14/2017 - 22:00
Among clinical studies used to support FDA approval of high-risk medical device modifications, fewer than half were randomized, blinded, or controlled, according to a study published by JAMA.

Study examines quality of evidence for drugs granted accelerated FDA approval

Lun, 08/14/2017 - 22:00
Among drugs granted accelerated approval by the FDA in 2009-2013, efficacy was often confirmed in subsequent trials a minimum of three years after approval, and the use of nonrandomized studies and surrogate measures, instead of clinical outcomes, was common, according to a study published by JAMA.

'Accelerated approval' drugs: How well are they studied?

Lun, 08/14/2017 - 22:00
In a recent study published in JAMA, researchers at Brigham and Women's Hospital and the London School of Economics and Political Science examined the pre-approval and post-approval clinical trials of drugs granted FDA Accelerated Approval between 2009 and 2013.

Epigenetic drugs show promise as antivirals

Lun, 08/14/2017 - 22:00
Some epigenetic pharmaceuticals have the potential to be used as broad spectrum antivirals, according to a study reported in a recent issue of the journal mBio. The study demonstrated that histone methyltransferases EZH2/1 inhibitors, which are being used in cancer clinical trials, have activity against a variety of viruses, including herpes simplex virus (HSV).

Don't get mad -- it's only a game!

Lun, 08/14/2017 - 22:00
Feelings can run high in competitive situations and lead to heated arguments and disputes. But not everyone reacts in the same way -- men react differently to women and the reactions of individuals are dissimilar to those of groups of persons. This has been demonstrated scientifically by psychologists at Friedrich-Alexander-Universität Erlangen-Nürnberg who examined the correlations between competitiveness, aggression and hormones.

How tolerance for incivility affects political participation

Lun, 08/14/2017 - 22:00
Those with higher tolerance for incivility are more likely to comment on political news stories, engage in online political discussions, express support for candidates on social media and donate to campaigns.

Two new beetle genera and 4 new species from the Australopacific in a new monograph

Lun, 08/14/2017 - 22:00
Amid his ongoing revisionary work on a number of hister beetle genera, the Slovakian-born entomologist and Alexander von Humboldt Foundation researcher Dr. TomᚠLackner, together with fellow entomologist Dr. Richard Leschen, discovered two new genera and a total of four new species from the Australopacific. Amongst them, there are the first myrmecophilous and termitophilous saprinines known from the region. They are all featured in an extensive monograph published in the open-access journal ZooKeys.

Study gives first proof that the Earth has a natural thermostat

Lun, 08/14/2017 - 22:00
New data provides the first proof that the Earth has a natural thermostat which enables the planet to recover from extremes of climate change -- but the recovery timescales are significant.

Deep-UV probing method detects electron transfer in photovoltaics

Lun, 08/14/2017 - 22:00
EPFL scientists have developed a new method to efficiently measure electron transfer in dye-sensitized transition-metal oxide photovoltaics.

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