Biological Tissue Penetration Efficiency of Bioluminescence (image) Tokyo Institute of Technology Share Print E-Mail Caption Optical imaging of the biological tissue (4-mm/8mm-thick sliced beef) were placed on the wells with each substrate (left). Penetration efficiency of bioluminescence through the tissue (right). Credit Tokyo Institute of Technology Usage Restrictions Reference citation of the original paper is 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.