Figure 2 (IMAGE) Japan Science and Technology Agency Caption Transparent polypropylene film containing zeolite nanoparticles with a small diameter. Credit ©Nakamura Choukou Co. Usage Restrictions None License Licensed content 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.