Xiaoqing Tan (IMAGE) Penn State Caption Researcher Xiaoqing Tan, a recently graduated master's degree student in food science and a member of the Microbiome Center, Huck Institutes of the Life Sciences, tests bacteria samples from apple-processing plants in the laboratory. Credit Penn State Usage Restrictions non commercial use only 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.