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Experience leads to the growth of new brain cells

2013-05-10
The DFG-Center for Regenerative Therapies Dresden - Cluster of Excellence at the TU Dresden (CRTD), the Dresden site of the German Center for Neurodegenerative Diseases (DZNE), and the Max Planck Institute for Human Development in Berlin played a pivotal role in the study. The adult brain continues to grow with the challenges that it faces; its changes are linked to the development of personality and behavior. But what is the link between individual experience and brain structure? Why do identical twins not resemble each other perfectly even when they grew up together? ...

Bacterial infection in mosquitoes renders them immune to malaria parasites

2013-05-10
Scientists funded by the National Institute of Allergy and Infectious Diseases (NIAID), part of the National Institutes of Health, have established an inheritable bacterial infection in malaria-transmitting Anopheles mosquitoes that renders them immune to malaria parasites. Specifically, the scientists infected the mosquitoes with Wolbachia, a bacterium common among insects that previously has been shown to prevent malaria-inducing Plasmodium parasites from developing in Anopheles mosquitoes. Before now, researchers had been unable to create mosquitoes with a stable Wolbachia ...

Water on moon, Earth have a common source

2013-05-10
PROVIDENCE, R.I. [Brown University] —Water inside the Moon's mantle came from primitive meteorites, new research finds, the same source thought to have supplied most of the water on Earth. The findings raise new questions about the process that formed the Moon. The Moon is thought to have formed from a disc of debris left when a giant object hit the Earth 4.5 billion years ago, very early in Earth's history. Scientists have long assumed that the heat from an impact of that size would cause hydrogen and other volatile elements to boil off into space, meaning the Moon must ...

Pets may help reduce your risk of heart disease

2013-05-10
Having a pet might lower your risk of heart disease, according to a new American Heart Association scientific statement. The statement is published online in the association's journal Circulation. "Pet ownership, particularly dog ownership, is probably associated with a decreased risk of heart disease" said Glenn N. Levine, M.D., professor at Baylor College of Medicine in Houston, Texas, and chair of the committee that wrote the statement after reviewing previous studies of the influence of pets. Research shows that: Pet ownership is probably associated with a reduction ...

NIH scientists create new tool for identifying powerful HIV antibodies

2013-05-10
A team of NIH scientists has developed a new tool to identify broadly neutralizing antibodies (bNAbs) capable of preventing infection by the majority of HIV strains found around the globe, an advance that could help speed HIV vaccine research. Scientists have long studied HIV-infected individuals whose blood shows powerful neutralization activity because understanding how HIV bNAbs develop and attack the virus can yield clues for HIV vaccine design. But until now, available methods for analyzing blood samples did not easily yield specific information about the HIV bNAbs ...

Where on Earth did the moon's water come from?

2013-05-10
Washington, D.C.— Water is perhaps the most important molecule in our solar system. Figuring out where it came from and how it was distributed within and among the planets can help scientists understand how planets formed and evolved. New research from a team including Carnegie's Erik Hauri demonstrates that water from the interiors of the Earth and Moon has a common origin. Their work is published online in Science Express. The Moon is thought to have formed from a disc of debris left when a Mars-sized impactor hit the Earth 4.5 billion years ago, the Giant Impact. ...

Air pollution increases risk of insulin resistance in children

2013-05-10
New research shows that growing up in areas where air pollution is increased raises the risk of insulin resistance (the prescursor to diabetes) in children. The research is published in Diabetologia, the journal of the European Association for the Study of Diabetes (EASD), and is by Elisabeth Thiering and Joachim Heinrich, Helmholtz Zentrum München, Neuherberg, Germany, and colleagues. Previous studies have identified links between air pollution and other chronic conditions such as atherosclerosis and heart disease. However to date, epidemiological studies that have ...

Mosquito survey identifies reservoir of disease

2013-05-10
A large scale, five year study of mosquitoes from different ecological regions in Kenya, including savannah grassland, semi-arid Acacia thorn bushes, and mangrove swamps, found a reservoir of viruses carried by mosquitoes (arboviruses) that are responsible for human and animal diseases. This research, published in BioMed Central's open access journal Virology Journal, highlights the need for continued surveillance in order to monitor the risk of disease outbreaks. Over 450,000 mosquitoes from 11 sites across Kenya were screened by researchers from the United States Army ...

Researchers identifies gene associated with eczema in dogs

2013-05-10
A novel gene associated with canine atopic dermatitis has been identified by a team of researchers led by professors Kerstin Lindblad-Toh, Uppsala university and Åke Hedhammar, SLU, Sweden. The gene encodes a protein called plakophilin 2, which is crucial for the formation and proper functioning of the skin structure, suggesting an aberrant skin barrier as a potential risk factor for atopic dermatitis. Details appear today in the open-access journal PLoS Genetics. Atopic dermatitis (or eczema) is an inflammatory, relapsing non-contagious skin disease affecting about ...

Heady mathematics

2013-05-10
VIDEO: A computer-generated movie showing a collapsing soap bubble cluster where macroscopic gas dynamics are coupled to microscopic fluid flow inside the thin-film membranes, leading to membrane rearrangement, drainage, and rupture.... Click here for more information. Bubble baths and soapy dishwater, the refreshing head on a beer and the luscious froth on a cappuccino. All are foams, beautiful yet ephemeral as the bubbles pop one by one. Two University of California, Berkeley, ...

The Liverpool Care Pathway -- improvement in quality of end-of-life care

2013-05-10
Death in hospital remains very common for cancer patients in developed countries. Although hospital surveys show that death was highly expected, patients dying in hospital have a high probability of unrelieved and poorly treated physical suffering, and emotional, spiritual and social distress. Quality improvement programmes in the United States and United Kingdom suggest that aspects of the 'excellent practice' of palliative care can be transferred to other settings. The Liverpool Care Pathway (LCP) for the dying patient is one pathway that seeks to achieve this. It offers ...

Water on moon, Earth came from same primitive meteorites

2013-05-10
The water found on the moon, like that on Earth, came from small meteorites called carbonaceous chondrites in the first 100 million years or so after the solar system formed, researchers from Brown and Case Western Reserve universities and Carnegie Institution of Washington have found. Evidence discovered within samples of moon dust returned by lunar crews of Apollo 15 and 17 dispels the theory that comets delivered the molecules. The research is published online in Science Express today. The discovery's telltale sign is found in the ratio of an isotopic form of hydrogen, ...

Dust in the clouds

2013-05-10
CAMBRIDGE, MA -- At any given time, cirrus clouds — the thin wisps of vapor that trail across the sky — cover nearly one-third of the globe. These clouds coalesce in the upper layers of the troposphere, often more than 10 miles above the Earth's surface. Cirrus clouds influence global climate, cooling the planet by reflecting incoming solar radiation and warming it by trapping outgoing heat. Understanding the mechanisms by which these clouds form may help scientists better predict future climate patterns. Now an interdisciplinary team from MIT, the National Oceanic ...

Using bacteria to stop malaria

2013-05-10
EAST LANSING, Mich. — Mosquitoes are deadly efficient disease transmitters. Research conducted at Michigan State University, however, demonstrates that they also can be equally adept in curing diseases such as malaria. A study in the current issue of Science shows that the transmission of malaria via mosquitoes to humans can be interrupted by using a strain of the bacteria Wolbachia in the insects. In a sense, Wolbachia would act as a vaccine of sorts for mosquitoes that would protect them from malaria parasites. Treating mosquitoes would prevent them from transmitting ...

Scientists define a new mechanism leading to tumor hypoxia

2013-05-10
An article published recently in Tumor Microenvironment and Therapy - an open access journal by Versita, defines a novel mechanism of tumor hypoxia induced by the longitudinal gradient of residual oxygen along tumor vessels as they transverse the tumor. Growing evidence from experimental studies and clinical trials suggests a fundamental role of hypoxia in solid tumors. The mechanisms leading to hypoxia include the rapid rate of tumor growth, poor tumor perfusion or transiently disrupted tumor blood flow. Now, scientists from the University of Pennsylvania, led by Professor ...

Women altering menstruation cycles in large numbers, UO study shows

2013-05-10
EUGENE, Ore. -- A surprisingly large number of women 18 or older choose to delay or skip monthly menstruation by deviating from the instructions of birth-control pills and other hormonal contraceptives, a team of University of Oregon researchers and others found in a study of female students at the university. Most women who alter bleeding cycles do so for convenience rather than to avoid menstrual symptoms, and many learn about the option from nonmedical sources, according to research by the university's Department of Human Physiology, Portland-based Oregon Health and ...

Researchers discover dynamic behavior of progenitor cells in brain

2013-05-10
By monitoring the behavior of a class of cells in the brains of living mice, neuroscientists at Johns Hopkins discovered that these cells remain highly dynamic in the adult brain, where they transform into cells that insulate nerve fibers and help form scars that aid in tissue repair. Published online April 28 in the journal Nature Neuroscience, their work sheds light on how these multipurpose cells communicate with each other to maintain a highly regular, grid-like distribution throughout the brain and spinal cord. The disappearance of one of these so-called progenitor ...

How state and local governments can address the obesity epidemic

2013-05-10
With simple and innovative measures, public agencies at state and local levels can play a significant role in promoting healthier eating habits—steps that could make a difference in curbing the nation's obesity epidemic. One effective option, according to researchers at the Johns Hopkins Bloomberg School of Public Health, is requiring restaurants to include calorie counts on menus, along with the physical activity equivalents required to burn off a meal. The researchers, who examined studies on calorie labeling and regulatory options available to local governments, offer ...

Nobody likes a 'fat-talker,' Notre Dame study shows

2013-05-10
Women who engage in "fat talk" — the self-disparaging remarks girls and women make in relation to eating, exercise or their bodies — are less liked by their peers, a new study from the University of Notre Dame finds. Led by Alexandra Corning, research associate professor of psychology and director of Notre Dame's Body Image and Eating Disorder Lab, the study was presented recently at the Midwestern Psychological Association annual conference. In the study, college-age women were presented with a series of photos of either noticeably thin or noticeably overweight women ...

After the breakup in a digital world: Purging Facebook of painful memories

2013-05-10
The era is long gone when a romantic breakup meant ripped-up photos and burned love letters. Today, digital photos and emails can be quickly deleted but the proliferation of social media has made forgetting a bigger chore. What about the ubiquitous digital records of a once beloved that lurk on Facebook, tumblr, and flicker? "People are keeping huge collections of digital possessions," says Steve Whittaker, a psychology professor at UC Santa Cruz who specializes in human-computer interaction. "There has been little exploration of the negative role of digital possessions ...

New technique to improve quality control of lithium-ion batteries

2013-05-10
Purdue has applied for a patent on the technique. INFORMATION: Writer: Emil Venere, 765-494-4709, venere@purdue.edu Sources: Douglas E. Adams, 765-449-4249, deadams@purdue.edu James Caruthers, 756-494-6625, caruthers@purdue.edu Related websites: Douglas Adams: https://engineering.purdue.edu/ME/People/ptProfile?id=12366 James Caruthers: https://engineering.purdue.edu/ChE/People/ptProfile?id=24829 IMAGE CAPTION: This thermal image was recorded using a new tool developed at Purdue that detects flaws in lithium-ion batteries as they are being manufactured, a ...

Biomaterial shows promise for Type 1 diabetes treatment

2013-05-10
Researchers have made a significant first step with newly engineered biomaterials for cell transplantation that could help lead to a possible cure for Type 1 diabetes, which affects about 3 million Americans. Georgia Tech engineers and Emory University clinicians have successfully engrafted insulin-producing cells into a diabetic mouse model, reversing diabetic symptoms in the animal in as little as 10 days. The research team engineered a biomaterial to protect the cluster of insulin-producing cells – donor pancreatic islets – during injection. The material also contains ...

Unleashing the watchdog protein

2013-05-10
VIDEO: Researchers have unlocked a new door to developing drugs to slow the progression of Parkinson's disease. They have discovered the 3-D structure of the protein Parkin. Mutations in Parkin cause... Click here for more information. McGill University researchers have unlocked a new door to developing drugs to slow the progression of Parkinson's disease. Collaborating teams led by Dr. Edward A. Fon at the Montreal Neurological Institute and Hospital -The Neuro, and Dr. ...

Climate record from bottom of Russian lake shows Arctic was warmer millions of years ago

2013-05-10
The Arctic was very warm during a period roughly 3.5 to 2 million years ago--a time when research suggests that the level of carbon dioxide in the atmosphere was roughly comparable to today's--leading to the conclusion that relatively small fluctuations in carbon dioxide levels can have a major influence on Arctic climate, according to a new analysis of the longest terrestrial sediment core ever collected in the Arctic. "One of our major findings is that the Arctic was very warm in the middle Pliocene and Early Pleistocene--roughly 3.6 to 2.2 million years ago--when ...

Study highlights under-appreciated benefit of oyster restoration

2013-05-10
Scientists have identified many benefits for restoring oyster reefs to Chesapeake Bay and other coastal ecosystems. Oysters filter and clean the water, provide habitat for their own young and for other species, and sustain both watermen and seafood lovers. A new study co-authored by Professor Roger Mann of the Virginia Institute of Marine Science adds another item to this list of benefits—the ability of oyster reefs to buffer the increasing acidity of ocean waters. The study, "Ecosystem effects of shell aggregations and cycling in coastal waters: An example of Chesapeake ...
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