An improved 1 H NMR spectra interpretation of B and Al zeolites with dipolar methodsZeolite B Beta has been studied with 1 H and 11 B MAS NMR, and infrared spectroscopies. The data depend severely on the dehydration temperature, and their analysis yield an increasing degree of condensation of...
ChemInform Abstract: THE INTERPRETATION OF THE (1)H NMR SPECTRUM OF 1,2,4,5〩EXATETRAENE ORIENTED IN A NEMATIC SOLVENTdoi:10.1002/chin.197510072structure (organic substances)hydrocarbons (acyclic compounds)Nois available for this article.BJOERN PEDERSEN...
Serum samples of a subset of the Di@bet.es cohort consisting of 1387 individuals with obesity were analyzed by H-NMR. A K-means algorithm was deployed to define different H-NMR metabolomics-based clusters. Then, the association of these clusters with future development of cardiometabolic disease...
Stereoelectronic Interpretation for the Anomalous 1H NMR Chemical Shifts and One-Bond C-H Coupling Constants (Perlin Effects) in 1,3-Dioxanes, 1,3-Oxathian... E Juaristi,G Cuevas,A Vela - 《Journal of the American Chemical Society》 被引量: 117发表: 1994年 Stereoelectronic interactions in ...
The 1H and 13C NMR spectra (Supplementary Figures S20 and S20) of 6 were similar to those of compounds 3 and 4. The major differences in the 1H NMR spectrum for 6 were the absence of the oxymethine proton and appearance of a sharp singlet NH proton [δH 9.47 (s)]. The 13C NMR ...
NMR spectrum. NMR spectrum of the purified melanin pigment synthesized by Streptomyces glaucescens strain NEAE-H (Fig. 7B) shows resonances between 8.0 and 6.0 ppm and between 0.813 and 4.504 ppm. Resonances between 8.0 and 6.0 ppm in NMR spectra are assigned to aromatic ...
1H NMR Spectroscopy of Metabolically Active Microorganisms Using Non-Destructive Magic Angle Spinning.]]>Explores how high resolution ¹H nuclear magnetic resonance spectroscopy can be used to study biofilm metabolism under environmentally relevant conditions. Use of non-destructive magic angle spinning; ...
2a). This compound proved to be unstable and decomposed during silica gel column chromatography, and we thus confirmed its formation in the crude material via nuclear magnetic resonance spectroscopy (NMR), thin-layer chromatography (TLC), and mass spectroscopy (MS). The crude ester 1 was ...
1H NMR analysis was used to confirm the absence of trace xanthine impurity in the product. The pure 8-bromoxanthine was used for co-crystallization, fungal growth assays and transporter uptake assays (as detailed above). Where 8-bromoxanthine was used, this replaced xanthine during all the ...
In higher concentrations of BAY 60-2770 in the presence of L-ascorbate, most of the peaks are missing in the NMR spectrum, implying that there is no stable complex with activator and the protein loses its folding (Fig. 6E and F). The data, in all, show that when L-ascorbate is ...