Volatile-carbon locking and release in protoplanetary disks - A study of TW Hya and HD 100546M. Kama, S. Bruderer, E. F. van Dishoeck, M. Hogerheijde, C. P. Folsom, A. Miotello, D. Fedele, A. Belloche, R. Güsten and F. WyrowskiA&A, 592 (2016) A83DOI: https://doi.org/10.1051/0004-6361/201526991