Two billion years ago the Earth system was recovering from perhaps the single-most profound modification of its surface environments: the oxygenation of the atmosphere and oceans. This led to a series of major changes in global biogeochemical cycles, as a team around Aivo Lepland of the Norwegian...

Hany S. Abed, B.Pharm., M.B.B.S., of the University of Adelaide and Royal Adelaide Hospital, Adelaide, Australia and colleagues evaluated the effect of a structured weight reduction program on atrial fibrillation symptoms. Fuente : http://www.eurekalert.org/pub_releases/2013-11/tjn...

Seth S. Martin, M.D., of the Johns Hopkins Ciccarone Center for the Prevention of Heart Disease, Baltimore, and colleagues developed a method for estimating low-density lipoprotein cholesterol (LDL-C) levels that is more accurate than the standard measure. Fuente :...

Michael J. Mack, M.D., of the Baylor Health Care System, Plano, Texas, and colleagues describe the experience in the US with transcatheter aortic valve replacement (TAVR), including patient selection, procedural details, and in-hospital and 30-day outcomes following TAVR, a less invasive procedure...

Jose Augusto Barreto-Filho, M.D., Ph.D., of the Federal University of Sergipe and the Clinica e Hospital Sao Lucas, Sergipe, Brazil, and colleagues assessed procedure rates and outcomes of surgical aortic valve replacement among 82,755,924 Medicare fee-for-service beneficiaries between 1999 and...

Sten Rubertsson, M.D., Ph.D., of Uppsala University, Sweden and colleagues assessed whether cardiopulmonary resuscitation (CPR) in which chest compressions are delivered with a mechanical device would result in superior 4-hour survival in patients with out-of-hospital cardiac arrest compared to CPR...

Francis Kim, M.D., of Harborview Medical Center, Seattle, and colleagues evaluated whether early prehospital cooling (lowering body temperature) improved survival to hospital discharge and neurological outcome in cardiac arrest patients with or without ventricular fibrillation. Fuente :...

Jiang He, M.D., Ph.D., of the Tulane University School of Public Health and Tropical Medicine, New Orleans, and colleagues examined whether moderate lowering of blood pressure within the first 48 hours after the onset of an acute ischemic stroke would reduce death and major disability at 14 days or...

Heart disease is the leading cause of pregnancy-related deaths in California and is likely true for the rest of the nation. Specifically, an enlarged and weakened heart accounted for two-thirds of pregnancy-related deaths noted in the study.Paying attention to heart disease risk factors during...

There was a correlation between yearly rates of congenital heart defects in children and yearly emissions of some industrial pollutants in Alberta, Canada.The good news is that rates of congenital heart defects are going down in Canada as the industrial emissions decrease in that country. Fuente :...

Scientists used brain-computer interface technology to help stroke survivors use their minds to power "virtual reality hands" to help regain the use of their arms and hands.The technology offers hope of recovery to stroke survivors and others who have lost mobility and control of their arms and...

A new study highlights the importance of exercise and physical fitness among people with stable coronary artery disease. Researchers at the Johns Hopkins University School of Medicine and Henry Ford Hospital found that higher levels of physical fitness lower the risk of having heart attacks and...

En 2012 el gasto en I+D en % del PIB ha caído por segundo año consecutivo, y se situó en el 1,3% del PIB frente al 1,36% alcanzado en 2011, según los datos del Instituto Nacional de Estadística (INE) presentados en la sede de la Fundación Cotec en Madrid. En concreto, los 13.392 millones de...

El Gregor Mendel Institute of Molecular Plant Biology lidera un estudio en el que se ha identificado y caracterizado un nuevo gen que regula el desarrollo del meristerno radicular de las plantas, un tejido que les permite mantener un crecimiento continuo de la raíz.  En el trabajo también...

Thirty-eight minutes or longer of CPR can improve the chance of a person surviving cardiac arrest and having normal brain function. Fuente : http://www.eurekalert.org/pub_releases/2013-11/aha...

Blood transfusions en route to hospital may reduce trauma patients' risk of death. Fuente : http://www.eurekalert.org/pub_releases/2013-11/aha...

Just one minute of CPR video training for bystanders in a shopping mall could save lives in emergencies, according to research presented at the American Heart Association's Scientific Sessions 2013. Fuente : http://www.eurekalert.org/pub_releases/2013-11/aha...

Hospitalized children are more likely to die after a cardiac arrest if it occurs during the night shift, according to research presented at the American Heart Association's Scientific Sessions 2013. Fuente : http://www.eurekalert.org/pub_releases/2013-11/aha...

Residents of major cities with high levels of air pollution have an increased risk of dry eye syndrome, according to a study presented at the world's largest ophthalmic conference, the 117th Annual Meeting of the American Academy of Ophthalmology, in New Orleans. Study subjects in and around...

Research presented today at the 117th Annual Meeting of the American Academy of Ophthalmology shows promising data about a device that helps people who have lost their vision due to a blinding genetic disease to recognize common objects. In the study, the researchers found when the objects'...

Irma Castañeda se trenza desde niña el pelo ensortijado y lo cuida con recetas naturales heredadas de su madre, sin hacer caso del “feo” o el “malo” que escucha sobre el cabello de las mujeres negras. Con suavidad y manos diestras, ella apunta a erosionar algo mucho más duro que esos adjetivos: el...

On Monday, November 18, NASA is set to launch MAVEN, a small scientific satellite, to do some chemical meter-reading in the Martian atmosphere. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/Q...

What might look like a colossal jet shooting away from a galaxy turns out to be an illusion. New data from the National Science Foundation's Karl G. Jansky Very Large Array (VLA) reveal that two galaxies, one lying behind the other, have been masquerading as one. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/f...

Negociadores del Sur en desarrollo en la conferencia internacional sobre cambio climático que se desarrolla en la capital polaca ven con buenos ojos el énfasis en financiar los esfuerzos de adaptación, pero rechazan el nuevo rol que se le está dando al sector privado. En la 19 Conferencia de las...

El Instituto Potosino de Investigación Científica y Tecnológica (IPICYT) anunció el financiamiento a dos proyectos de sus alumnos de posgrado con hasta 400 mil pesos cada uno, en aras de fomentar la creación de empresas. A través de esta acción, se busca que las ideas de los alumnos detonen nuevas...

Negociadores de los países menos adelantados reclaman que la ONU establezca con un urgencia un fondo para salvar del colapso al Mecanismo de Desarrollo Limpio (MDL) previsto en el Protocolo de Kyoto. En la 19 Conferencia de las Partes de la la Convención Marco de las Naciones Unidas sobre el Cambio...

El pescado es desde hace siglos parte fundamental de la cultura gastronómica del Caribe y constituye una fuente importante de nutrientes esenciales, en especial para las cientos de pequeñas comunidades costeras. “Es la proteína que ponemos en la olla, y a veces hay que economizarla para poder...

The Tough Mudder, an extreme sports event that bills itself as "probably the toughest event on the planet," resulted in injuries ranging from multiple electrical burns to seizure-induced Todd's paralysis. A case series of serious injuries sustained by participants in one such race was reported in a new article. Fuente :...

Researchers have found a bulk metallic glass based on palladium that's as strong as the best composite bulk metallic glasses and comparable to steel, aluminum and titanium. Fuente : http://feeds.sciencedaily.com/~r/sciencedaily/~3/D...