Illegal Cooking Oils (IMAGE) Science China Press Caption Photographic images of probes solutions with various percentages of Gelin show illegal cooking oils in Lvbao soybean oils, (a) gold nanoparticles probes, (b) copper ions probes. Credit ©Science China Press 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.