Fig. 3 (IMAGE) Osaka University Caption Quantitative detection of the number of SERS signals of alkynes at the single-cell level (left figure). The number of SERS signals detected per cell at each administration concentration over time (right). Using the quantitative SERS detection method we successfully observed that the uptake speed greatly depended on the drug concentration. Credit Osaka University 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.