Solid State 13C-NMR studies. Solid state NMR has been used very effectively in understanding the role of functional groups in many proton conducting MOFs38,39. Interestingly, from solid state NMR a monodentate coordination of EG was observed for both 1_EG and 3_EG (Figs 5 and s12) ...
aThe techniques of Fourier transform infrared (FTIR) and proton nuclear magnetic resonance (1H NMR) spectroscopy were used as tools for the identification of functional groups and the confirmation of the structure of the copolymers obtained. 使用了傅立叶变换红外线(FTIR)和氢核核磁反应(1H核磁共振)分...
The structure was confirmed by 1H NMR analysis. Water uptake values demonstrate an increase in water uptake ... A Roy,BR Einsla,WL Harrison,... 被引量: 2发表: 2004年 Synthesis and characterization of a novel sulfonated poly (aryl ether ketone sulfone) containing rigid fluorene group for ...
Among these, by far the most useful technique for the structure elucidation of unknown alkaloids of this class has been 13 C NMR spectroscopy. We had earlier tabulated 13 C chemical shift ranges of various functional groups in C 19 -diterpenoid alkaloids (1). It is likely that errors have ...
The NMR-structure of the A-ATPase subunit F revealed a two-domain structure and the flexible C-terminal domain binds to the C-terminal domain of VHA-B (Coskun et al., 2004; Gayen et al., 2007). The arrangement of peripheral stalks resembles a scaffold which anchors the V1-domain to...
No differences in CRLBs were observed in the associative striatum for other metabolites at baseline or after 4 weeks. No differences in CRLBs were observed in the cerebellum for any condition. The FWHM values and signal-to-noise ratios are given in Table 4. Patients had lower FWHM than ...
(typically calculated using the Cαposition as in our case) in the trajectory from areference valuecalculated from either an average structure or the crystallographic orNMRstructure. In our case, we used the average structure. The calculated RMSF values are used to calculate theB-factors (Debye...
However, pKa studies of less acidic secondary amides suggest pKa values may be depressed to 7–8 depending on how the amide group is polarized (i.e. charge delocalization)31. This is supported by the known event of proton exchanges occurring at the amide groups of protein backbones. More...
The phenolic groups of tyrosine and thiol groups of cysteine are highlighted in red and blue, respectively. (b) Molecular structure of the dimer of Y7C revealed by NMR. Carbon, oxygen, and nitrogen are shown in gray, red, and purple, respectively. (c) Cross-sectional HRTEM image of the...
(Supplementary Fig.19). The presence of deuteron at C2 is further confirmed by NMR analysis of the purified umbelliferone product from the enzyme assay (Supplementary Fig.20). In contrast, spontaneous umbelliferone formation from 2OHpCCoA in 66% D2O in the absence ofAtCOSY showed no H/D...