Carbon-13 nuclear magnetic resonance of polymers spinning at the magic angle by Jacob Schaefer and E. O. Stejskal 2026-11-05
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Journal of the American Chemical Society98(4),1031–1032(1976); DOI10.1021/ja00420a036. Original first-page text and Figure1 verified through indexed original PDF: polysulfone CP spectra with/without magic-angle spinning and solution comparison. Publisher byline Jacob Schaefer and E.O.Stejskal verified. Use1976 issue date, not the landing page digital posting date in2002.
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