1. Department of Trace Examination; National Police University of China; Shenyang Liaoning 110035 P. R. China
2. Key Laboratory of Impression Evidence Examination and Identification Technology; Ministry of Public Security; Shenyang Liaoning 110035 P. R. China
3. Department of Chemistry & Biochemistry; Stephenson Life Sciences Research Center; University of Oklahoma; Norman Oklahoma 73019 USA
4. Institute of Applied Bioresource Research; College of Animal Science; Zhejiang University; Hangzhou Zhejiang 310058 P. R. China
5. School of Materials Science and Engineering; Zhejiang University; Hangzhou Zhejiang 310027 China