Bone Repair (image) Ulsan National Institute of Science and Technology(UNIST) Share Print E-Mail Caption (Upper left) Chemical bonding and physical structure of C?N?4 sheets. (Lower left) In a liquid state, red light is transmitted at a maximum of 450nm and emitted at a wavelength of 635 nm. (Right) After four weeks of loading C?N?4 sheets into the skull-damaged mice, the skull was regenerated by more than 90 percent. Credit UNIST Usage Restrictions None 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.