Research in Progress (RIP) https://rip.trb.org/ en-us Copyright © 2026. National Academy of Sciences. All rights reserved. http://blogs.law.harvard.edu/tech/rss tris-trb@nas.edu (Bill McLeod) tris-trb@nas.edu (Bill McLeod) Research in Progress (RIP) https://rip.trb.org/Images/PageHeader-wTitle-RIP.jpg https://rip.trb.org/ Investigation of Alternative Solvents for Asphalt Extraction and Recovery https://rip.trb.org/View/2437340 Tue, 01 Oct 2024 09:52:27 GMT https://rip.trb.org/View/2437340 Solvent Fractionation for the Separation of Lignocellulosic Raw Materials https://rip.trb.org/View/1367877 Wed, 02 Sep 2015 14:50:19 GMT https://rip.trb.org/View/1367877