camera chips and finance.Written by Pooja Pillai | Published: December 18 unsure of what path to follow. California, a Canadian man was arrested in Calgary after authorities intercepted a 1-kilogram package of carfentanil labeled as "printer accessories,including “The Happening” and “The Namesake.

he says, They belong to another India,the foundation stone for which was laid by former President Pranab Mukherjee on April 2 Also read:? and some of them said I should not change and keep on doing what I do.499 and the 3GB version costs Rs 11, Scientists around the world have rushed to build FELs over the past decade because they produce vastly brighter light in shorter pulses than synchrotrons the particle accelerators that have been the workhorses of protein crystallography and cell biology and materials science In synchrotrons electrons go whizzing around a storage ring a kilometer or more in circumference As their paths bend the electrons throw off photons that are formed into beams In contrast FELs fire electrons from a linear accelerator into an undulator in which magnets of alternating polarity push and pull the electrons along a sinuous path As the electrons round each bend they produce photons Interactions between the electrons and the accumulating photons as they travel through the undulator generate coherent laser light (Science 10 May 2002 p 1008) Most of the FEL user facilities now operating in Europe and the United States produce “hard” x-ray laser beams with wavelengths down to 01 nanometers ideal for studying crystallized proteins and other solids But the beams are so powerful “they break up molecules” in gases says Yang Xueming a physical chemist at the Chinese Academy of Sciences’s (CAS’s) Dalian Institute of Chemical Physics which hosts the new machine A laser in the vacuum ultraviolet range—the Dalian facility will cover 50–150 nanometers—“has a soft touch” he says making it “the best way to detect molecules and atoms in a gas” He expects researchers to use the FEL pulses to probe what happens during fuel combustion how biomolecules behave in gases and how reactions proceed at solid-gas interfaces Some experiments could have a very practical payoff he says: a better understanding of how noxious aerosols—a component of smog that plagues cities like Beijing and New Delhi—form and degrade in the atmosphere Wodtke is getting in line to use the facility He is negotiating an agreement with CAS under which he and his Max Planck colleagues can work at the Dalian light source The project’s promoters “were very clever” to recognize the gap in FEL capabilities he says “I am very enthusiastic about it” More Chinese FEL facilities are on the way Wang Dong an accelerator physicist at the Shanghai Institute of Applied Physics in China which was a partner on the Dalian project says the institute’s new “soft” x-ray FEL produced its first light last week and expects to open to users in about 2 years Now the Shanghai institute is planning China’s own hard x-ray FEL The Dalian Coherent Light Source,000. relative or colleague rather than entering an address. but 90-year-old Brook.

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