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C 1s XPS spectra (A), N 1s XPS spectra (B), O 1s XPS spectra (C), P 2p XPS spectra (D), and CPMAS solid-state 31P NMR spectra of crosslinked starch (E). Peakes are deconvoluted for phosphorylated products: monostarch monophosphate (MSMP), distarch monophosphate (DSMP), and monostarch diphosphate (MSDP).
