经济学人:分子生物学 蛋白质的奥秘(3)

One common protein-contact prediction is that, if the side chain of one member of a pair of amino acids brought close together by folding is long, 一种比较普通的蛋白质接触预测就是，如果一对氨基酸的一个侧链折叠后很长，

TED演讲:如何把熟蛋变生(2)

Here's the key part. 接下来是关键的部分。 The solution nearest the wall spins faster than the solution closer to the middle. 离试管壁最近的溶液，要比中间的溶液旋转得更快。 That difference in velocity creates sheer str

SSS 2011-01-27

This is Scientific Americans 60-Second Science. Im Steve Mirsky. Got a minute? Generations of American children have been told, Eat your broccoli! And for decades, researchers have known that broccoli and related vegetables like cauliflower and water

SSS 2008-09-04

This is Scientific American's 60-Second Science. I'm Cynthia Graber. This will just take a minute. Conditions such as mad cow disease are caused by abnormally shaped proteins, called prions. Prions spread by causing other, normal proteins to misfold

听歌学英语:挪威才女Maria Arredondo好听单曲(A tho

A thousand nights by Maria Arredondo A thousand nights later memories linger The good the bad...I can touch them with my finger A thousand nights later I only got me No problem, no complaints It's the way it should be Life was fast It was free Guess

VOA常速英语2008年-US Company Produces Guides to Communicate Witho

By George Dwyer Washington 12 March 2008 A Washington D.C.-area company has built a profitable business by producing durable pocket guides that help people communicate using visual images rather than spoken language. International travelers have been

SSS 2008-10-08

This is Scientific American's 60-Second Science. I'm Steve Mirsky . Got a minute ? The Nobel Prize in chemistry goes to three men who revolutionized molecular life science, Japans Osamu Shimomura and Americans Martin Chalfie and Roger Tsien. They dev

SSS 2008-05-05

This is Scientific American's 60-Second Science, Im Steve Mirsky. Got a minute? Biologists often attempt to construct a genealogy that shows the relationships of all life on earth. One well-accepted effort compares the nucleic acid sequences that cod

SSS 2009-10-07

The 2009 Nobel Prize in Chemistry goes to Venkatraman Ramakrishnan of the MRC Laboratory of Molecular Biology in England, Yale Universitys Thomas Steitz, and Ada Yonath of the Weizmann Institute of Science in Israel for their studies of the ribosome.

2006年VOA标准英语-Former Political Prisoners Seek to Aid Tho

By Ron Corben Mae Sot, Thailand 23 February 2006 Former Burmese political prisoners now living in Thailand have formed an association to support compatriots still detained back home. Burmese women sho

2006年VOA标准英语-Comics Drawing on Indian Mythology Are a Hit in

By Shilpi Jha Washington, DC 27 September 2006 watch Indian Comics report Millions of comic books are sold in the United States each year. Some are bought by children, but many are sought by young adults who grew up reading about their favorite supe

Mad Cow Disease

74 疯牛病及其最新的检验方法 DATE=7-24-01 TITLE=SCIENCE IN THE NEWS #2134 - Mad Cow Disease BYLINE=Nancy Steinbach, George Grow VOICE ONE: This is Sarah Long. VOICE TWO: And this is Steve E

VOA标准英语2010-Hollywood Rediscovers Ancient Greek Mytho

Sam Worthington as Perseus in Clash of the Titans Hollywood has rediscovered ancient Greek mythology with its gods and monsters, muscular men with shields and swords and the hero's quest to save humanity in the 2010 version of Clash of the Titans: Wi

2006年VOA标准英语-US Shuttle Astronauts Test Orbital Repair Metho

By David McAlary Washington 12 July 2006 Astronaut Mike Fossum (on arm)installs the International Space Station's railcar-like mobile transporter U.S. space shuttle astronauts are on their third spacewalk since Saturday, this time to practice method

VOA常速英语2008年-Violence in Kenya Leaves Hundreds of Thousands

By Cathy Majtenyi Nairobi 21 February 2008 In Kenya, violence that began shortly after elections in December is blamed for the deaths of more than 1,000 people and the displacement of 600,000 othe rs. Many who fled their homes now live in church comp

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By Kurt Achin Seoul 14 July 2006 A disagreement over pharmaceutical products has derailed attempts to negotiate a free-trade agreement between South Korea and the United States. While negotiators still hope to reach a deal, serious disputes remain t

Using bacteria to generate energy hopeful

BEIJING, May 24 (Xinhuanet) -- Scientists revealed for the first time the molecular structure of proteins, which enables bacteria to transfer electrical charges, according to a new study. The revelation was published in Proceedings of the National Ac

Human fertilization process discovered

BEIJING, Aug. 22 (Xinhuanet) -- Researchers have discovered how a human egg captures an incoming sperm for fertilization, paving the way to help couples suffering from infertility, according to media reports on Monday. An international team of resear

健康生活 从食物搭配开始

There has been a lot of research done on the significance of food combining when we eat. Many believe that our stomach is designed to only digest food correctly one food type at a time or eating foods together that are compatible with each other. Thi

经济学人:熊猫遗传学:熊猫的第二拇指(2)

He and his colleagues noted parallel changes in the genes for three digestive enzymes whose job is to liberate two particular amino acids, lysine and arginine, from proteins. 他的团队发现三种消化酶基因相似的改变，这些消化酶的作