Vitamin C affects whether genes are switched on or off inside mouse stem cells, and may thereby play a previously unknown and fundamental role in helping to guide normal development in mice, humans and other animals, a scientific team led by UC San Francisco researchers has discovered. Fuente :...

According to animal scientists at UC Davis, emerging biotechnologies can reduce the environmental impact of cattle production. Feed supplements and synthetic hormones will not affect humans, but they will increase food production. Efficient animals can produce more food for hungry people. Fuente :...

Hovering about 70 light-years from Earth -- that's "next door" by astronomical standards -- is a star astronomers call HD 97658, which is almost bright enough to see with the naked eye. But the real "star" is the planet HD 97658b, not much more than twice the Earth's diameter and a little less than...

Northwestern University and Rush University Medical Center researchers have a possible explanation why some alcoholics develop liver disease: Disrupted circadian rhythms can push those vulnerable over the edge to disease. Mice whose internal clocks were out of sync with the light-dark cycle and...

An eight-week intervention involving 141 preschoolers in a Head Start program and their parents produced significant improvements in the children's behavior and brain functions supporting attention and reduced levels of parental stress that, in turn, improved the families' quality of life. Fuente :...

We rely on our physical environment for many things -- clean water, land for crops or pastures, storm water absorption, and recreation, among others. Yet it has been challenging to figure out how to sustain the many benefits people obtain from nature -- so-called "ecosystem services" -- in any...

Acupuncture, when used as a complementary or adjuvant therapy for in vitro fertilization, may be beneficial depending on the baseline pregnancy rates of a fertility clinic, according to research from the University of Maryland School of Medicine. The analysis from the University of Maryland Center...

NASA successfully completed two pre-vibration solar array deployment tests of the Global Precipitation Measurement satellite on June 6 and June 15, 2013. Fuente : http://www.eurekalert.org/pub_releases/2013-07/nsf...

A key brain structure that regulates emotions works differently in preschoolers with depression compared with their healthy peers, according to new research at the Washington University School of Medicine in St. Louis. Fuente : http://www.eurekalert.org/pub_releases/2013-07/wus...

Innovative new techniques for tracking the spread of infectious diseases are being developed with the help of news websites, blogs, and social media. Penn State University biologist Marcel Salathé and his coauthors describe the advantages and challenges of "digital epidemiology" -- a new field of...

New research reveals that the likely culprit behind Alzheimer's disease has a different molecular structure than current drugs' target -- perhaps explaining why these medications produce little improvement in patients. Fuente : http://www.eurekalert.org/pub_releases/2013-07/uoc...

Fragments of DNA found in the blood may help doctors in the future more quickly determine which patients with chest pain are likely to have narrowed coronary arteries.High blood levels of these DNA particles may eventually help identify patients at risk for further serious heart problems. Fuente :...

Dysfunction of the ubiquitin-proteasome system has been detected in many neurodegenerative diseases, such as Alzheimer's and Parkinson's diseases and certain types of cancer. Researchers at the University of Helsinki, Finland, have now discovered an important mechanism that regulates proteasome activity. Fuente :...

Simply reminding older adults about stereotypes of aging and forgetfulness exacerbates real memory problems, reveals important new research from the USC Davis School of Gerontology. But the study also reveals a easy way to combat the problem. Fuente :...

Global climate change will induce large changes to the plant communities on Earth, but these will typically occur with major time lags. This has been demonstrated by a new analysis carried out by researchers at Aarhus University. Many plants will remain long after the climate has become unfavorable...

An estimated two-thirds of all Americans are overweight or obese and many find it difficult to lose weight and keep it off. They've tried fad diets, exercise programs, diet pills and other methods but the battle continues. Now, a new study suggests that watching an avatar model weight-loss behavior...

The American Thoracic Society has released an official statement on the ethical and health policy considerations surrounding adult and pediatric controlled organ donation after circulatory determination of death, the recovery of organs after cessation of circulation from patients with severe...

With death rates from cancer have remained largely unchanged over the past 60 years, a physicist is trying to shed more light on the disease with a very different theory of its origin that traces cancer back to the dawn of multicellularity more than a billion years ago. Fuente :...

Using an innovative new camera on board a sounding rocket, an international team of scientists have captured the sharpest images yet of the Sun’s outer atmosphere. The team discovered fast-track ‘highways’ and intriguing ‘sparkles’ that may help answer a long-standing solar mystery. Fuente :...

Astronomers may have found a new way to map quasars, the energetic and luminous central regions often found in distant galaxies. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/d...

Researchers have discovered in an animal model how fear can increase or decrease the ability to discriminate among sounds depending on context, providing potential new insight into the distorted perceptions of victims of PTSD. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/W...

Chemists have discovered that an 'impossible' reaction at cold temperatures actually occurs with vigor, which could change our understanding of how alcohols are formed and destroyed in space. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/i...

Researchers have built a matchbox-sized device that can test for the presence of bacteria in a couple of minutes, instead of up to several weeks. This might be a crucial medical tool especially for resistant strains. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/1...

Scientists have identified the neuronal circuits in the spinal cord of mice that control the ability to produce the alternating movements of the legs during walking. The study demonstrates that two genetically-defined groups of nerve cells are in control of limb alternation at different speeds of...

Reliable prediction of El Nino response to global warming is difficult, as El Nino varies naturally over decades and centuries. Instrumental records are too short to determine whether recent changes are natural or attributable to increased greenhouse gases. An international team of scientists now...

What allows certain plants to survive freezing and thrive in the Canadian climate, while others are sensitive to the slightest drop in temperature? Those that flourish activate specific genes at just the right time -- but the way gene activation is controlled remains poorly understood. Fuente :...

A protein first shown to function in the liver plays a crucial role in pregnancy in mice and has a key role in the human menstrual cycle, according to researchers. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/X...

In the world, there are a lot of small molecules people would like to get rid of, or at least convert to something useful. Think carbon dioxide, the greenhouse gas most responsible for far-reaching effects on global climate. Nitrogen is another ubiquitous small-molecule gas that can be transformed...

Un libro muestra el papel de las imágenes en la exploración moderna. Las fotografías atestiguan los logros humanos pero también son una herramienta de conquista imperial ||| Fuente : http://feedproxy.google.com/~r/materia/noticias/~3...