"Understanding how an organism is made requires knowing which genes are turned on or off as cells make fate decisions, not just the static sequence of a genome," said Sean Megason, associate professor of systems biology in Harvard Medical School. "This is the first technological approach that ...
His message resonated in me—it was like an areligious conversion. What he said made perfect sense, despite it being practically the opposite of what was common practice in organic chemistry at the time. I didn't t...
What was needed was a way to measure something related to BAC without invading a suspect's body. In the 1940s, breath alcohol testing devices were first developed for use by police. In 1954, Dr. Robert Borkenstein of the Indiana State Police invented the Breathalyzer, one type of breath ...
The first such device was developed by a British potter, Henry Doulton, back in the early 1800s for purifying water drawn from the Thames, which was so contaminated with raw sewage that cholera and typhoid were continual dangers [source: Brodrick]. Since Doulton, other inventors have made ...
bottled water industry was worth $94 billion, even with the rise of popular reusable water bottle brands. Oscar Wong / Getty Images For a natural resource that most of us have access to for minimal cost, water is doing pretty well as a revenue generator. Bottled water is a $94 billion...
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organism [ˈɔːrɡənɪzəm] n. 生物;有机体 complicated [ˈkɒmplɪkeɪtɪd] adj.复杂的;费解的 spherical [ˈsfɪrɪkl] adj.球形的;球状的 clump [klʌmp] n.一团;一堆;一簇 mechanism [ˈmɛ...
A few animals, like a microscopic organism called the tartigrade, can go without water for an extraordinary period of time. If the tartigrade's environment doesn't have enough water, the animal goes into a life without water, called anhydrobiosis. Sugar takes the place of water in its cell...
"Indeed, within 15 months, we had made a vaccine against the Ebola virus, which has demonstrated its very good results both in the first, second, and third phase of clinical trials and in the field conditions of Guinea in Africa. That's why the drug was registered....
In fact, the basis of Occam's razor was an already well-established line of medieval thought by William's time. William captured the essence of the principle and packaged it in a way that was easily understood (by anyone who knew Latin, at least). By creating a couple of simple ...