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62,995 articles from ScienceDaily

• FRIDAY 10. FEBRUARY, 2012
• 17:13 The power of estrogen: Male snakes attract other males

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  A new study has shown that boosting the estrogen levels of male garter snakes causes them to secrete the same pheromones that females use to attract suitors, and turned the males into just about the sexiest snake in the neighborhood -- attracting dozens of other males eager to mate.  

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• 17:05 High school students test best with 7 hours of sleep at night

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  New research finds that 16- to 18-year-olds perform better academically when they shave about two hours off what current guidelines prescribe.  

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• 16:59 Controlling parents more likely to have delinquent children

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  Authoritarian parents whose child-rearing style can be summed up as “it’s my way or the highway” are more likely to raise disrespectful, delinquent children who do not see them as legitimate authority figures than authoritative parents who listen to their children and gain their respect and trust, according to new research.  

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• 16:47 Accounting for missing meson particles

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  Measurements from high-energy collision experiments lead to a better understanding of why meson particles disappear.  

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• 16:47 Unpicking HIV's 'invisibility cloak'

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  Drug researchers hunting for alternative ways to treat human immunodeficiency virus (HIV) infections may soon have a novel target -- its camouflage coat. HIV hides inside a cloak unusually rich in a sugar called mannose, which it uses to slip past the immune system before infecting its host's cells. Recently, however, biochemists discovered a family of chemical compounds that stick strongly to mannose. Understanding how this mechanism works could reveal a way to make drugs adhere to and kill HIV.  

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• 16:47 What lies beneath: Mapping hidden nanostructures within materials, and perhaps cells

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  A new method to map nanostructures within materials may lead to biological imaging of the internal organization of cells.  

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• THURSDAY 9. FEBRUARY, 2012
• 23:33 Electrical engineers build 'no-waste' laser

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  Researchers have built the smallest room-temperature nanolaser to date, as well as an even more startling device: a highly efficient, "thresholdless" laser that funnels all its photons into lasing, without any waste.  

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• 23:29 'Dark plasmons' transmit energy

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  Microscopic channels of gold nanoparticles have the ability to transmit electromagnetic energy that starts as light and propagates via "dark plasmons," according to researchers.  

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• 23:28 Substance P causes seizures in patients infected by pork tapeworm

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  A neuropeptide called Substance P is the cause of seizures in patients with brains infected by the pork tapeworm.  

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• 23:28 Tell me how you are, and I know how long you will live

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  The way people rate their health determines their probability of survival in the following decades. Researchers have demonstrated that for ratings ranging from "excellent," "good," "fair," and "poor" to "very poor," the risk of mortality increases steadily – independently of such known risk factors as smoking, low education levels or pre-existing diseases.  

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• 23:28 Ultraviolet protection molecule in plants yields its secrets

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  Lying around in the sun all day is hazardous not just for humans but also for plants. Ultraviolet radiation from the sun can damage proteins and DNA inside cells, leading to poor growth and even death. But plants have evolved some powerful adaptive defenses, including a complex array of protective responses orchestrated by a UV-sensing protein molecule known as UVR8. Now, scientists have put together a detailed picture of UVR8's structure and inner workings.  

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• 21:28 Deconstructing a mystery: What caused Snowmaggedon?

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  Scientists are using computer models to help unravel the mystery of a record-setting snowfall in the Washington, DC area in early 2010.  

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• 21:28 Hydrogen from acidic water: Potential low cost alternative to platinum for splitting water

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  A technique for creating a new molecule that structurally and chemically replicates the active part of the molybdenite catalyst paves the way for developing catalytic materials that can serve as effective low-cost alternatives to platinum for generating hydrogen gas from water.  

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• 21:28 Most lethal known species of prion protein identified

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  Scientists have identified a single prion protein that causes neuronal death similar to that seen in "mad cow" disease, but is at least 10 times more lethal than larger prion species.  

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• 20:40 3-D laser map shows earthquake before and after

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  Geologists have a new tool to study how earthquakes change the landscape down to a few inches, and it's giving them insight into how earthquake faults behave.  

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• 20:40 Drug quickly reverses Alzheimer's symptoms in mice

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  Neuroscientists have made a dramatic breakthrough in their efforts to find a cure for Alzheimer's disease. The use of a drug appears to quickly reverse the pathological, cognitive and memory deficits caused by the onset of Alzheimer's in mice.  

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• 20:40 Ocean microbe communities changing, but long-term environmental impact is unclear

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  As oceans warm due to climate change, water layers will mix less and affect the microbes and plankton that pump carbon out of the atmosphere – but researchers say it's still unclear whether these processes will further increase global warming or decrease it. It could be either, they say.  

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• 20:40 To perform with less effort, practice beyond perfection

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  Whether you are an athlete, a musician or a stroke patient learning to walk again, practice can make perfect, but more practice may make you more efficient, according to a surprising new study.  

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• 20:39 Chemists harvest light to create 'green' tool for pharmaceuticals

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  Researchers have created a new, “green” method for developing medicines. The researchers used energy from a light bulb to create an organic molecule that may be useful in the treatment of Alzheimer’s and other brain diseases.  

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• 20:39 New prenatal genetic test is much more powerful at detecting fetal abnormalities

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  A national, U.S. federally funded study has found that testing a developing fetus’ DNA through chromosomal microarray (CMA) provides more information about potential disorders than does the standard method of prenatal testing, which is to visually examine the chromosomes (karyotyping).  

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• 20:02 Gene therapy boosts brain repair for demyelinating diseases

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  Our bodies are full of tiny superheroes -- antibodies that fight foreign invaders, cells that regenerate, and structures that ensure our systems run smoothly. One such structure is myelin, a material that forms a protective cape around the axons of our nerve cells so that they can send signals quickly and efficiently. But myelin becomes damaged in demyelinating diseases like multiple sclerosis, leaving neurons without their sheaths. Researchers now believe they have found a way to help the brain replace damaged myelin.  

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• 20:02 Ocean warming causes elephant seals to dive deeper

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  Global warming is having an effect on the dive behavior and search for food of southern elephant seals.  

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• 19:58 Baby knows best: Baby-led weaning promotes healthy food preferences

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  A new study has shown that babies who are weaned using solid finger food are more likely to develop healthier food preferences and are less likely to become overweight as children than those who are spoon-fed pureed food.  

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• 19:58 New battery could lead to cheaper, more efficient solar energy

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  Scientists have found that a new type of battery has the potential to improve the efficiency and reduce the cost of solar power.  

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• 19:58 Seismic resistance: Model analyzes shape-memory alloys for use in earthquake-resistant structures

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  Recent earthquake damage has exposed the vulnerability of existing structures to strong ground movement. Researchers are now analyzing shape-memory alloys for their potential use in constructing seismic-resistant structures.  

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