日期：2013-08-23 Cells are very good at protecting their precious contents -- and as a result, it's very difficult to penetrate their membrane walls to deliver drugs, nutrients or biosensors without damaging or destroying the cell. One effective way of doing so, dis... 阅读全文>>

日期：2013-08-23 Researchers at Princeton University are developing ways to use mobile phones to explore how one's environment influences one's sense of well-being. In a study involving volunteers who agreed to provide information about their feelings and locations,... 阅读全文>>

日期：2013-08-23 In an unexpected finding, scientists have linked the activation of a stress gene in immune-system cells to the spread of breast cancer to other parts of the body. Researchers say the study suggests this gene, called ATF3, may be the crucial link bet... 阅读全文>>

日期：2013-08-23 When a member of the wolf pack leaves the group, the howling by those left behind isn't a reflection of stress but of the quality of their relationships. So say researchers based on a study of nine wolves from two packs living at Austria's Wolf Scie... 阅读全文>>

日期：2013-08-22 By any measure, tuberculosis (TB) is a wildly successful pathogen. It infects as many as two billion people in every corner of the world, with a new infection of a human host estimated to occur every second. Now, thanks to a new analysis of dozens o... 阅读全文>>

日期：2013-08-22 A new computer simulation conducted at the University of Bristol (UB) and University of Miami (UM) Rosenstiel School of Marine Atmospheric Science has revealed the epic, ocean-spanning journeys travelled by millimetre-sized coral larvae through the... 阅读全文>>

日期：2013-08-22 It turns out that alligators（短吻鳄） do not live on meat alone. Neither do Nile crocodiles. A new study led by the Wildlife Conservation Society says that the American alligator and a dozen other crocodile species enjoy an occasional taste of frui... 阅读全文>>

日期：2013-08-22 Anxiety disorders, which include posttraumatic stress disorder, social phobias（社交恐惧症） and obsessive-compulsive disorder, affect 40 million American adults in a given year. Currently available treatments, such as antianxiety drugs, are not alw... 阅读全文>>

日期：2013-08-22 A reduction in working hours does not necessarily mean happier employees, as it might merely be adding stress to their general working environment. This is according to a study by Robert Rudolf of Korea University, Seoul, that looks at the impact of... 阅读全文>>

日期：2013-08-22 Genetics may play a role in how people's taste receptors send signals, leading to a wide spectrum of taste preferences, according to Penn State food scientists. These varied, genetically influenced responses may mean that food and drink companies wi... 阅读全文>>

日期：2013-08-21 The human body is full of tiny microorganisms -- hundreds to thousands of species of bacteria collectively called the microbiome, which are believed to contribute to a healthy existence. The gastrointestinal (GI) tract -- and the colon in particular... 阅读全文>>

日期：2013-08-21 Managing fish in human-altered rivers is a challenge because their food webs are sensitive to environmental disturbance. So reports a new study in the journal Ecological Monographs, based on an exhaustive three-year analysis of the Colorado River in... 阅读全文>>

日期：2013-08-21 University of Warwick scientists have shown how to tie knots in liquid crystals using a miniature Mbius strip made from silica（硅石） particles. By tying substances like this in knots, the researchers hope to understand how their intricate configur... 阅读全文>>

日期：2013-08-21 One of the lesser known concerns about commercial aircraft is their stability on the ground during taxiing（滑行） , takeoff, and landing. During these processes, planes must maintain stability under various operating conditions. However, in some si... 阅读全文>>

日期：2013-08-21 The Faroe Islands were colonised much earlier than previously believed, and it wasn't by the Vikings, according to new research. New archaeological evidence places human colonisation in the 4th to 6th centuries AD, at least 300-500 years earlier tha... 阅读全文>>

日期：2013-08-21 Indiana University School of Medicine researchers have found a series of RNA biomarkers in blood that may help identify who is at risk for committing suicide. In a study reported Aug. 20 in the advance online edition of the Nature Publishing Group j... 阅读全文>>

日期：2013-08-20 A way of firing up the body's immune system in order to attack cancer has been discovered by US researchers. 美国研究人员发现了一种激发身体免疫系统来对付癌症的方法。 The immune system is delicately balanced so it attacks invaders but not the body's... 阅读全文>>

日期：2013-08-20 A lifetime of too much copper in our diets may be contributing to Alzheimer's disease, US scientists say. 一生的饮食中摄入过多铜元素可能引发阿尔茨海默症。 However, research is divided, with other studies suggesting copper may actually protect the br... 阅读全文>>

日期：2013-08-20 MIT chemical engineers have discovered that arrays of billions of nanoscale sensors have unique properties that could help pharmaceutical companies produce drugs -- especially those based on antibodies -- more safely and efficiently. Using these sen... 阅读全文>>

日期：2013-08-20 Manipulation is often thought of as morally repugnant（讨厌的，矛盾的） , but it might be responsible for the evolutionary origins of some helpful or altruistic（利他的） behavior, according to a new study. In evolutionary biology, manipulation occu... 阅读全文>>