Study on Nitrogen Forms in Phenolic Polymers Incorporating Protien by 15N CP—MAS NMR

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Phenolic polymers synthesized by reactions by reactions of p-benzoquinone with 15N-labelled protein or (15NH4)2SO4 were studied by using 15N CP-MAS NMR technique in combination with chemical approaches.Results showed that more than 80% of nitrogen in quin
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