ANALYSIS OF HUMAN PLACENTA BY <sup>31</sup>P NUCLEAR MAGNETIC RESONANCE AND THIN-LAYER C

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Five phospholipids in human placenta were determined by phosphorus 31 nuclearmagnetic resonance(<sup>31</sup>P NMR)spectroscopy and thin-layer chromatography(TLC)scanning combined with the corrective method of absorbance proportional coefficie
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