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Sugar Power for Cell Phones In fuel cells，chemical reactions generate electrical currents.The process usually relies on precious metals，such as platinum.In living cells，enzymes perform a similar job，breaking down sugars to obtain electrons and produce energy. Minteer and Tamara Klotzbach，also of St Louis University，have now developed polymers that wrap around an enzyme and preserve it in a microscopic pocket.We tailor these pockets to provide the ideal microenvironment for the enzyme，Minteer says.The polymers keep the enzyme active for months instead of days. So far，the new fuel cells dont produce much power，but the fact that they work at all is exciting，says Paul Kenis，a chemical engineer at the University of Illinois2 at Urhana-Champaign3.Just getting it to work. Kenis says，is a major accomplishment. 词汇：5enzaImI5lektrEJd5plAtinEm5membreinp electronn.电子 oxidizev.氧化degradev.降解 glucosen.葡萄糖5pClimE7baiEudi5reidEblp microenvironment n.微环境 embedv.埋置，插入5prEutCnp 试题 A When enzymes can be commonly found in living ceils. C When the technology of a new type of fuel cell is suitable for mass production. 2. What trouble did Minteer and Klotzhach have in their research? B They had trouble keeping biological cells active. | 
