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WASHINGTON, April 28, 2015 � Science fans, assemble! On May 1, the world’s top superhero team is back to save the day in “Avengers: Age of Ultron.� This week, Reactions looks at the chemistry behind these iconic heroes� gear and superpowers, including Tony Stark’s suit, Captain America’s shield and more. Check out the video here: .

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The American Chemical Öйú365betÖÐÎĹÙÍø is a nonprofit organization chartered by the U.S. Congress. With more than 158,000 members, ACS is the world’s largest scientific society and a global leader in providing access to chemistry-related research through its multiple databases, peer-reviewed journals and scientific conferences. Its main offices are in Washington, D.C., and Columbus, Ohio.