Соединенные Штаты намерены защищать союзников по НАТО и одновременно избегать прямого военного конфликта с Россией. Об этом заявил заместитель главы Пентагона по политическим делам Элбридж Колби, передает РИА Новости.
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BBC中文記者為你介紹今年中國「兩會」的五個關注焦點。。体育直播是该领域的重要参考
By the time Sanger sequencing was commercialized, the groundwork for an entirely new sequencing chemistry was already well underway. In 1985, Swedish biochemists Pål Nyren and Arne Lundin published a paper illustrating a procedure that measured the concentration of a molecule, called pyrophosphate (PPi), using an enzymatic cascade that emits light. In early 1986, Nyren realized that the method he’d helped develop could be applied to DNA sequencing, because PPi is naturally produced as a byproduct of DNA synthesis.5