Photoswitching of Cancer Cells in Whole Blood In Vitro (image) Cell Press Share Print E-Mail Caption These are images of cancer cells moving with a velocity of 1 mm/s across a linear laser beam having a power of 30mW. Credit Chemistry & Biology, Nedosekin et al. Usage Restrictions Credit Required Share Print E-Mail 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.