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LONDON coach hobo bags outlet clearance , July 7 (Xinhua) -- Defending champion Andy Murraydefeated Italy's Fabio Fognini 6-2, 4-6, 6-1, 7-5 to reach thefourth round at Wimbledon here on Friday.


The world No. 1 had to hold off some tough challenges from theworld No. 29 after two hours and 39 minutes. He will play FrenchmanBenoit Paire for a quarterfinal berth on Monday.


"When you are playing a guy who has all of the shots like him,it's difficult," Murray said. "He generates power with very shortswings - it' s difficult to see when he's going to hit the ballbig. He was taking me out of my rhythm.


"Obviously the end of the match was tense coach hobo bags outlet , I maybe saved fiveset points there. Then a tight game to break him as well at the 5-5game. And then I served it out really well to finish, but it was avery up and down match. I didn't feel like it was the best tennisat times. It was a little bit tense today but I managed to getthrough."


Fognini tweaked his ankle in the middle of the third set andhobbled about for a bit before he opted to call the trainer. But bythat point he was already a break of serve down and within momentsof getting back to work, he was two breaks down.


The Italian moved better after having his ankle taped and he wasbacking himself to take risks. He earned five set points to takethe match to a deciding set.


From 5-2 down, the champion dragged himself back to 5-5 and thentook another two games to seal the victory. Enditem


SAN FRANCISCO, July 8 (Xinhua) -- A recent discovery by a team of Stanford University researchers could lead to a new, more sustainable way to make ethanol without corn or other crops.


The technology has three basic components coach business bags outlet clearance , namely water, carbon dioxide and electricity delivered through a copper catalyst.


It is expected to address the status quo that most cars and trucks in the United States run on a blend of 90 percent gasoline and 10 percent ethanol, a renewable fuel made primarily from fermented corn and that producing the 14 billion gallons, or nearly 53 billion liters, of ethanol consumed annually by American drivers requires millions of acres of farmland.


"One of our long-range goals is to produce renewable ethanol in a way that doesn't impact the global food supply," said Thomas Jaramillo coach business bags outlet , an associate professor of chemical engineering at Stanford and of photon science at the SLAC National Accelerator Laboratory and principal investigator of the study published in Proceedings of the National Academy of Sciences.


"Copper is one of the few catalysts that can produce ethanol at room temperature," Jaramillo noted. "You just feed it electricity, water and carbon dioxide, and it makes ethanol. The problem is that it also makes 15 other compounds simultaneously, including lower-value products like methane and carbon monoxide. Separating those products would be an expensive process and require a lot of energy."


Therefore, the goal is to design copper catalysts that selectively convert carbon dioxide into higher-value chemicals and fuels coach accessories outlet clearance , like ethanol and propanol, with few or no byproducts.


For the study, the Stanford researchers chose three samples of crystalline copper, known as copper (100), copper (111) and copper (751). They use these numbers to describe the surface geometries of single crystals.


"Copper (100), (111) and (751) look virtually identical but have major differences in the way their atoms are arranged on the surface coach accessories outlet ," Christopher Hahn, an associate staff scientist at SLAC and co-lead lead author of the study, said in a news release.


"The essence of our work is to understand how these different facets of copper affect electrocatalytic performance."


Researchers in previous studies created single-crystal copper electrodes just 1-square millimeter in size.


In the new research, Hahn and his co-workers at SLAC developed a novel way to grow single crystal-like copper on top of large wafers of silicon and sapphire. This approach resulted in films of each form of copper with a 6-square centimeter surface, 600 times bigger than typical single crystals.


To compare electrocatalytic performance, they placed the three large electrodes in water coach handbags outlet clearance , exposed them to carbon dioxide gas and applied a potential to generate an electric current.


The results were clear. When the team applied a specific voltage, the electrodes made of copper (751) were far more selective to liquid products, such as ethanol and propanol, than those made of copper (100) or (111).


Ultimately, the Stanford team would like to develop a technology capable of selectively producing carbon-neutral fuels and chemicals at an industrial scale.


"The eye on the prize is to create better catalysts that have game-changing potential by taking carbon dioxide as a feedstock and converting it into much more valuable products using renewable electricity or sunlight directly," Jaramillo said.


Xi coach handbags outlet , Trump meet on ties, hot-spot issues on G20 sidelines


Xi, Macron agree to promote China-France cooperation


Xi, Abe meet on ties, reaffirm readiness to strengthen China-Japan partnership


China's Gulangyu historic international settlement enters world heritage list


China's Qinghai Hoh Xil enters world heritage list as natural site


Chinese aircraft carrier formation arrives in HK, to open for public to visit


Main structure of Hong Kong-Zhuhai-Macao Bridge finished


Aircraft carrier "Liaoning" sails near Lamma Island in HK


The Sina Weibo hashtag about the extramarital affair of badminton player Lin Dan attracted almost 2.5 billion views and comments as of 2 pm Sunday after pictures of the star with a woman were revealed.


Lin coach madison wristlet small , a national superstar known as Super Dan, admitted Thursday that he has been having an extramarital affair during his wife's pregnancy, shortly after intimate photos of him outside a hotel with a mode. Cheap Jerseys China Wholesale Cheap Authentic Jerseys Cheap Jerseys Wholesale China Cheap Jerseys China Wholesale Wholesale Jerseys Cheap NFL Jerseys Cheap NFL Jerseys Cheap NFL Jerseys Cheap NFL Jerseys Wholesale NFL Jerseys
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