Words similar to c-nmr

Example sentences for: c-nmr

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In fact, turbidity was reported for some of the systems used in the 13C-NMR papers [ 4 ] , indicating the formation of coarse suspensions.
The claim that such turbidity did not affect 13C-NMR measurements [ 3 5 6 ] contrasts with evidence that even small multimers can change NMR chemical shifts [ 25 26 ] . It should be noted also that, at high concentrations of B =, extensive, reversible self-association of B =can lead to apparently stable supersaturation with no separation of an insoluble phase [ 2 ] . For example, at pH 8.5 and a UCB concentration of 20 μM (63 times S), the weight-average aggregation number of UCB has been found to be 7.17 [ 18 ] , corresponding to a molecular weight of 4,195.
Actually, turbidity was reported in some of the 13C-NMR samples [ 4 ] , indicating that coarse, insoluble aggregates of MBR were present.
Our low [UCB] in DMSO-water systems at comparable N, therefore, indicate that many of the (C 2H 3 ) 2 SO/buffer systems used in the 13C-NMR studies [ 3 4 5 6 ] were likely supersaturated with MBR.
This method, which is well established for aqueous solutions, yielded results in good agreement with data from the literature that was based on a very different method, measurements of electrical conductivity [ 28 ] . In the 13C-NMR papers, therefore, it was not justified, to assume that pH values do not change on adding DMSO [ 3 4 5 6 7 ] , or to use uncalibrated pH measurements for determination of the pK