Improved Polymers for Gas-Separation Membranes (3 of 9) (image) American Association for the Advancement of Science Share Print E-Mail Caption This is a representation of the trajectories of oxygen (blue) and nitrogen molecules (red) as they move through the polymer. This image relates to a paper that appeared in Jan. 18, 2013, issue of Science, published by AAAS. The paper, by Mariolino Carta at Cardiff University in Cardiff, UK, and colleagues was titled, "An Efficient Polymer Molecular Sieve for Membrane Gas Separations." Credit [Image courtesy of Elena Tocci] Usage Restrictions Please cite the owner of the image when publishing. This image may be freely used by reporters as part of news coverage, with proper attribution. Non-reporters must contact Science for permission. Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.