Application of the J cross-polarization technique to nitrogen-15 of polyamides in solution Holmes, B. S. ; Chingas, G. C. ; Moniz, W. B. ; Ferguson, Raymond C. Abstract Publication: Macromolecules Pub Date: November 1981 DOI: 10.1021/ma50007a033 Bibcode: 1981MaMol..14.1785H