Figure (IMAGE) Kanazawa University Caption Suitable solvents are needed to produce ethanol from cellulosic plant biomass. We have found that liquid zwitterions are suitable for it, but it has been difficult to liquefy zwitterions and the species have been strictly limited. Therefore, the solid zwitterions were liquefied through making deep eutectic solvents, which are liquids from solid-solid mixtures. The liquefied zwitterionic solvent was able to dissolve the cellulose. Credit Kanazawa University Usage Restrictions The image may only be used with appropriate caption and credit. License Original 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.