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Resonances for lactate are broadened in 500 MHz 1 H NMR spectra of human blood plasma and only about one-third is visible in Hahn spin-echo spectra. Similar effects are observed for some other carboxylate anions. Lactate added to the high-M r fraction of plasma can give rise to peaks which are too broad to observe in either single-pulse or spin-echo spectra. Addition of agents such...
Single-pulse and Hahn spin-echo 500 MHz 1 H NMR spectra of human blood plasma and isolated chylomicrons, VLDL, LDL and HDL are reported. The comparison has enabled specific assignments to be made for the resonances of individual lipoproteins in the CH 2 and CH 3 (fatty acid), and NMe +3 (phospholipid choline head group) regions of the spectra of plasma (0.8-1.3...
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