日期：2014-04-17 The proportion of land used to cultivate shade grown coffee, relative to the total land area of coffee cultivation, has fallen by nearly 20 percent globally since 1996, according to a new study by scientists from The University of Texas at Austin an... 阅读全文>>

日期：2014-04-17 The skull of a newly discovered 325-million-year-old shark-like species suggests that early cartilaginous（软骨的） and bony fishes have more to tell us about the early evolution of jawed vertebrates -- including humans -- than do modern sharks, as... 阅读全文>>

日期：2014-04-17 A research team at the Biozentrum of the University of Basel has discovered an protein family that plays a central role in the fight against the bacterial pathogen Salmonella within the cells. The so called interferon-induced GTPases reveal and elim... 阅读全文>>

日期：2014-04-17 Inexpensive computers, cell phones and other systems that substitute（代替） flexible plastic for silicon chips may be one step closer to reality, thanks to research published on April 16 in the journal Nature Communications. The paper describes a n... 阅读全文>>

日期：2014-04-17 New research from the University of Toronto Mississauga demonstrates how carnivores（食肉动物） transitioned into herbivores for the first time on land. The evolution of herbivory（食草性） was revolutionary to life on land because it meant terrestr... 阅读全文>>

日期：2014-04-16 Lower levels of blood sugar may make married people angrier at their spouses and even more likely to lash out（猛击，痛斥） aggressively, new research reveals. In a 21-day study, researchers found that levels of blood glucose in married people, meas... 阅读全文>>

日期：2014-04-16 The ability of forests to sequester（使隔绝） carbon from the atmosphere depends on nutrients available in the forest soils, shows new research from an international team of researchers, including IIASA. The study, published in the journal Nature Cl... 阅读全文>>

日期：2014-04-16 Tobacco, a high-density crop which is mown（割） several times throughout its cycle, can produce as much as 160 tonnes of fresh matter per hectare and become a source of biomass suitable for producing bioethanol. As Jon Veramendi, head of the plant... 阅读全文>>

日期：2014-04-16 By tracking brain activity when an animal stops to look around its environment, neuroscientists at the Johns Hopkins University believe they can mark the birth of a memory. Using lab rats on a circular track, James Knierim, professor of neuroscience... 阅读全文>>

日期：2014-04-16 Like humans, many animals depend on beneficial microbes for survival. Although such symbioses（共生） can persist for millions of years, the factors maintaining their long-term stability remain, in most cases, unknown. Scientists from the Max Planck... 阅读全文>>

日期：2014-04-16 By depositing an array of tiny, metallic, U-shaped structures onto a dielectric（非传导性的） material, a team of researchers in China has created a new artificial surface that can bend and focus electromagnetic waves the same way an antenna does. T... 阅读全文>>

日期：2014-04-15 In the last 100 years, Michigan has become warmer, with more rain coming through heavy downpours. Climate models suggest that the state will continue to warm and variability in precipitation（降水，沉淀） patterns will increase, which will have cons... 阅读全文>>

日期：2014-04-15 New research announced at the International Liver CongressTM 2014 today provides new hope for the notoriously difficult-to-treat population of liver transplant patients with recurring hepatitis C (HCV). As part of a compassionate use program, 104 po... 阅读全文>>

日期：2014-04-15 An analysis of temperature data since 1500 all but rules out the possibility that global warming in the industrial era is just a natural fluctuation in the earth's climate, according to a new study by McGill University physics professor Shaun Lovejo... 阅读全文>>

日期：2014-04-15 Some 2 to 5 percent of all international trade involves counterfeit（假冒的） goods, according to a 2013 United Nations report. These illicit products -- which include electronics, automotive and aircraft parts, pharmaceuticals, and food -- can pose... 阅读全文>>

日期：2014-04-14 Twelve weeks of an investigational oral therapy cured hepatitis C infection in more than 90 percent of patients with liver cirrhosis（肝硬化） and was well tolerated by these patients, according to an international study that included researchers fr... 阅读全文>>

日期：2014-04-14 Stunning images of a 305-million-year-old harvestman fossil reveal ancestors of the modern-day arachnids（蛛形类） had two sets of eyes rather than one. The researchers say their findings, published in the journal Current Biology, add significant de... 阅读全文>>

日期：2014-04-14 A virus that is present in most people in a latent（潜在的） state may induce or exacerbate（恶化） anemia（贫血） in patients with kidney disease, according to a study appearing in an upcoming issue of the Journal of the American Society of Nephrol... 阅读全文>>

日期：2014-04-14 A team of researchers from the University of California, San Diego School of Medicine and the Center for Cancer Systems Biology (CCSB) at the Dana-Farber Cancer Institute has uncovered a new aspect of autism, revealing that proteins involved in auti... 阅读全文>>

日期：2014-04-14 Jeff Benca is an admitted ber-geek when it comes to prehistoric plants, so it was no surprise that, when he submitted a paper describing a new species of long-extinct lycopod（石松植物） for publication, he ditched the standard line drawing and insi... 阅读全文>>