日期：2011-03-28 The human immunodeficiency virus (HIV), the cause of AIDS, makes use of the base excision repair（切补修复） pathway when inserting its DNA into the host-cell genome, according to a new study led by researchers at the Ohio State University Comprehen... 阅读全文>>

日期：2011-03-28 Studies done by Mark Lusk and colleagues at the Colorado School of Mines could significantly improve the efficiency of solar cells. Their latest work describes how the size of light-absorbing particles--quantum dots--affects the particles' ability t... 阅读全文>>

日期：2011-03-28 Despite decades of doctors' reluctance to recommend weight training to pregnant women, a new University of Georgia study has found that a supervised, low-to-moderate intensity program is safe and beneficial. The research, published in the current ed... 阅读全文>>

日期：2011-03-28 Researchers at Mount Sinai School of Medicine have discovered a way that mutations in a gene called LRRK2 may cause the most common inherited form of Parkinson's disease. The study, published online this month in the journal Public Library of Scienc... 阅读全文>>

日期：2011-03-28 How does your best friend feel when people act needy（贫困的） ? Or, about people being dishonest? What do they think when others seem uncomfortable in social situations? According to an upcoming study in Psychological Science, a journal of the Asso... 阅读全文>>

日期：2011-03-28 The first study to examine the activity of hundreds of individual human brain cells during seizures has found that seizures begin with extremely diverse（不同的，变化多的） neuronal activity, contrary to the classic view that they are characterized... 阅读全文>>

日期：2011-03-25 Stroke patients who received electrical brain stimulation coupled with swallowing exercises showed greater improvement in swallowing ability than patients who did not receive this stimulation, according to a pilot study reported in Stroke: Journal o... 阅读全文>>

日期：2011-03-25 The 2011 Arctic sea ice extent maximum that marks the beginning of the melt season appears to be tied for the lowest ever measured by satellites, say scientists at the University of Colorado Boulder's National Snow and Ice Data Center. The CU-Boulde... 阅读全文>>

日期：2011-03-25 Wild migratory birds（候鸟） may indeed play a role in the spread of bird flu, also known as highly pathogenic（致病的） avian influenza H5N1. A study by the U.S. Geological Survey, the United Nations Food and Agriculture Organization and the Chines... 阅读全文>>

日期：2011-03-25 Researchers excavating（挖掘） a creek（小溪） bed in central Texas have found evidence suggesting humans settled in North America some two thousand years earlier than previously estimated. The findings are reported in the March 25 issue of Science.... 阅读全文>>

日期：2011-03-24 Even relatively mild（温和的） stress can lead to long term disability and an inability to work, reveals a large population based study published online in the Journal of Epidemiology（流行病学） and Community Health. It is well known that mental he... 阅读全文>>

日期：2011-03-24 Mayo Clinic researchers have found that cardiac（心脏的） pacing may help epilepsy（癫痫） patients with seizure-related falls due to ictal（猝发的） asystole （心搏停止） , an unusual condition in which the heart stops beating during an epileptic s... 阅读全文>>

日期：2011-03-24 Brown dwarfs are essentially failed stars: they lack enough mass for gravity to trigger the nuclear reactions that make stars shine. The newly discovered brown dwarf, identified as CFBDSIR 1458+10B, is the dimmer member of a binary（二元的） brown d... 阅读全文>>

日期：2011-03-24 Smokers of mentholated（含薄荷醇的） cigarettes are no more likely to develop lung cancer than other smokers, according to a new, very large, prospective study of black and white smokers published online March 23 in the Journal of the National Cance... 阅读全文>>

日期：2011-03-23 A new study from Northwestern Medicine shows a high-fiber diet could be a critical heart-healthy lifestyle change young and middle-aged adults can make. The study found adults between 20 and 59 years old with the highest fiber intake had a significa... 阅读全文>>

日期：2011-03-23 Although recent evidence suggests that the clinical benefit may be uncertain for fibrates, a class of drugs used for the treatment of high lipid levels, use of these drugs is common in the U.S. and Canada, with usage increasing steadily in the last... 阅读全文>>

日期：2011-03-23 Specific genetic mutations in women with autoimmune diseases are associated with preeclampsia（子痫前期） a common pregnancy-related problem that can threaten the health of both baby and mother. Furthermore, investigation of these specific genetic m... 阅读全文>>

日期：2011-03-22 A long term study reports about the effectiveness of replacing bone marrow, purposely destroyed by chemotherapy（化学疗法） , with autologous（自体的） (self) stem cell rescue for people with aggressive forms of multiple sclerosis（多发性硬化） (MS)... 阅读全文>>

日期：2011-03-22 Engineers at Ohio State University have invented a lens that enables microscopic objects to be seen from nine different angles at once to create a 3D image. Other 3D microscopes use multiple lenses or cameras that move around an object; the new lens... 阅读全文>>

日期：2011-03-22 A new study by Baylor University geology（地质学） researchers shows that Native Americans' land use nearly a century ago produced a widespread impact on the eastern North American landscape and floodplain（泛滥平原） development several hundred yea... 阅读全文>>