We developed several novel two-dimensional(2D)NMR core analysis techniques,which not only enhance the analysis of fluid-saturated rock samples,but also open up an unexplored area for petrophysical research.This is different from the conventional one-dimensional(1D)NMR core analysis,in which only the...
Fundamental core-analysis measurements are unchanged, but advancesprovide the ability to test at reservoir conditions and to acquire simultaneousmeasurements of reservoir-dependent properties. Core analysis today uses X-raycomputerized tomography (CT) to determine two- and three-dimensional (2D and3D, ...
To produce a sufficient amount of intermediates for NMR analysis, an enlarged anoxic culture (2 l) containing S. denitrificans cells, testosterone (4 mM), and mercaptopropionic acid (0.5 mM) was produced. The intermediates were sequentially purified using liquid-liquid partition, silica gel chromatog...
NMR analysis with an excess amount of fucose revealed the structural basis for the molecular recognition. Namely, fucose deeply enters a pocket formed at a junction of β-sheet edges, with the methyl group placed at the bottom. It forms a number of hydrophobic and hydrogen-bonding interactions ...
Through the use of compositional analysis, electrospray ionization Fourier transform mass spectrometry, and 1H and 13C NMR spectroscopy applying various one- and two-dimensional experiments, we identified the structures of the carbohydrate backbones that contained D-glycero-D-talo-oct-2-ulopyranosonic ...
Bioinspired light-driven chloride pump with helical porphyrin channels Chao Li Yi Zhai Lei Jiang Nature Communications(2024) Salinity gradient induced blue energy generation using two-dimensional membranes D. Manikandan S. Karishma Pramoda K. Nayak ...
By means of 2D NMR techniques, the structure of this compound was revealed to an unexpected product 8. Analysis of the synthetic pathways allowed concluding that the unexpected product is a result of an “unexpected” migration of olefinic bond during dioxolanation of the 2-cyclohexenone ...
Insider report: A fluoroleucine mutant of ubiquitin (cyan) with two strategically placed fluorine reporter groups in its core was synthesised. 1H NMR, crystallography, CD spectroscopy, biological assay and calorimetry indicate minimal structural and functional perturbation compared to the native protein (...
Digital Core Analysis (DCA) has emerged as a crucial instrument in reservoir characterization in recent times. With the advent of high-resolution micro-CT imaging, it is now possible to visualize the three-dimensional microstructures of in-situ pores and flow patterns within rocks. DCA offers seve...
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