日期:2015-05-13 When ants go exploring in search of food they end up choosing collective routes that fit statistical distributions of probability. This has been demonstrated by a team of mathematicians after analysing the trails of a species of Argentine ant. Studi... 阅读全文>>

日期:2015-05-13 Wetlands created 20 years ago between tile-drained agricultural fields and the Embarras River were recently revisited for a new two-year University of Illinois research project. Results show an overall 62 percent nitrate removal rate and little emis... 阅读全文>>

日期:2015-05-13 In recent years, bed bugs (Cimex lectularius) have been appearing more and more often in beds around the world, and entomologists need specimens for research purposes. Scientists in France have developed a tool that will aid this research, and their... 阅读全文>>

日期:2015-05-13 Our immune systems vary with the seasons, according to a study led by the University of Cambridge that could help explain why certain conditions such as heart disease and rheumatoid arthritis are aggravated in winter whilst people tend to be healthi... 阅读全文>>

日期:2015-05-13 Expansion of cattle pastures has led to the destruction of huge swaths of rain forest in Brazil, home to the world's largest herd of commercial beef cattle. But a new study led by the University of Wisconsin-Madison's Holly Gibbs shows that market-d... 阅读全文>>

日期:2015-05-12 New research, led by the University of Southampton, has questioned the role played by ocean acidification, produced by the asteroid impact that killed the dinosaurs, in the extinction of ammonites and other planktonic calcifiers 66 million years ago... 阅读全文>>

日期:2015-05-12 Androgen deprivation therapy (ADT) is a common treatment option for patients with advanced stage prostate cancer. But nearly 80 percent of patients who receive ADT report experiencing hot flashes during and after treatment. Moffitt Cancer Center res... 阅读全文>>

日期:2015-05-12 The new 9-valent human papillomavirus vaccine, can potentially prevent 80 percent of cervical cancers in the United States, if given to all 11- or 12-year-old children before they are exposed to the virus. In addition to protecting against 80 percen... 阅读全文>>

日期:2015-05-12 Climate helps drive the erosion process that exposes economically valuable copper deposits and shapes the pattern of their global distribution, according to a new study from researchers at the University of Idaho and the University of Michigan. Near... 阅读全文>>

日期:2015-05-12 Duke University scientists have discovered a previously unknown dual mechanism that slows peat decay and may help reduce carbon dioxide emissions from peatlands during times of drought. This discovery could hold the key to helping us find a way to s... 阅读全文>>

日期:2015-05-12 There is an urgent need to develop global surveillance against the threat to public health caused by antimicrobial resistant pathogens, which can cause serious and untreatable infections in humans. Typhoid is a key example of this, with multidrug re... 阅读全文>>

日期:2015-05-12 Washington wine grape vineyards experimenting with sustainable pest management systems are seeing an unexpected benefit: an increase in butterflies. Over the years, loss in natural habitat has seen the decline in numbers of around 50 species of butt... 阅读全文>>

日期:2015-05-11 Climate change denial in public discourse may encourage climate scientists to over-emphasise scientific uncertainty and is also affecting how they themselves speak -- and perhaps even think -- about their own research, a new study from the Universit... 阅读全文>>

日期:2015-05-11 In a new study, published in Nature this week, a research team led from Uppsala University in Sweden presents the discovery of a new microbe that represents a missing link in the evolution of complex life. The study provides a new understanding of h... 阅读全文>>

日期:2015-05-11 A group of leading soil scientists, including the University of Delaware's Donald L. Sparks, has summarized the precarious state of the world's soil resources and the possible ramifications for human security in a paper published Thursday, May 7, in... 阅读全文>>

日期:2015-05-11 For the last decade, scientists have deployed increasingly capable underwater robots to map and monitor pockets of the ocean to track the health of fisheries, and survey marine habitats and species. In general, such robots are effective at carrying... 阅读全文>>

日期:2015-05-11 The Ebola virus (EBOV) causes lethal hemorrhagic fever in humans, with extremely high morbidity and mortality. It was first discovered in two simultaneous outbreaks near the Ebola River in sub-Saharan Africa in 1976. Sporadic outbreaks followed unti... 阅读全文>>

日期:2015-05-11 One of developmental biology's most perplexing questions concerns what signals transform masses of undifferentiated cells into tremendously complex organisms, a process called ontogeny. New research by University at Buffalo scientists, published in... 阅读全文>>

日期:2015-05-06 In the history of continental drift, India has been a mysterious record-holder. More than 140 million years ago, India was part of an immense supercontinent called Gondwana, which covered much of the Southern Hemisphere. Around 120 million years ago... 阅读全文>>

日期:2015-05-06 While fjords are celebrated for their beauty, these ecosystems are also major carbon sinks that likely play an important role in the regulation of the planet's climate, new research reveals. The finding is newly published in the international journa... 阅读全文>>

  • 首页
  • 上一页
  • 72
  • 73
  • 74
  • 75
  • 76
  • 77
  • 78
  • 79
  • 80
  • 81
  • 82
  • 下一页
  • 末页
  • 3857688