Solid-State 13C-NMR
Using a Reactive Force Field To Correlate Mobilities Obtained from Solid State 13C NMR on Mesoporous Silica Nanoparticle Systems
... Figure 6 shows the optimized conformations and the corre- sponding relative energies for AAP-MSN models with two mutually interacting AAP groups at distances P X, P Y, and P Z, as described earlier (see Figure 2e). The ...
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Solid-State 13C-NMR Investigation of Di- and Tri-block Biodegradable Copolymers Isolated In Their Inclusion Compounds with Cyclodextrins
... We had previously reported on the synthesis and characterization of the two biodegradable block copolymers evaluated in this study and their inclusion complexes with cyclodextrins (see Appendices 1 and 2). In those ...
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Flame Atomic Emission and Colorimetric Methods for the Determination of Cephalexin Monohydrate in Pharmaceutical Preparations Abbas S. Hasan Al-kahdimy | Mohammed Abdullah Ahmed
... color chromogen is measurred absorbance at 576 nm [9].the drug is detrmined in pure and in dosage form.the method is based on the formation of charge transfer complex using chloranilic acid as acceptor in non-aqueous ...
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Investigation of zeolitic imidazolate frameworks using 13C and 15N solid state NMR spectroscopy
... calculate NMR parameters for ZIFs where all sol- vent/water molecules have been removed from the ...accurate NMR parameters can be obtained, than solution-state NMR spectra of the neutral ...
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Photochemically induced dynamic nuclear polarization observed by solid state NMR in a uniformly 13C isotope labeled photosynthetic reaction center
... NMR experiments were performed with a DMX-200 NMR spectrometer equipped with a double resonance CP/MAS probe (Bruker-Biospin, Karlsruhe, Germany). The sample was loaded into a clear 4-mm sapphire rotor and ...
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1H and 13C solution and solid state NMR investigation into wax products from the Fischer Tropsch process
... solution state 13 C spectra above, solution-state 1 H data were obtained in deuterochloroform ...H NMR spectra of the standards (docosane and octacosane) and Co-wax ...
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Quantitative 13C MultiCP solid-state NMR as a tool for evaluation of cellulose crystallinity index measured directly inside sugarcane biomass
... After carrying out the spectral subtraction procedure, the spectral regions from 80 to 86 and 86 to 94 ppm were integrated to evaluate the intensity of the lines associated with ordered and disordered cellulose phases, ...
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Characterization of stratum corneum molecular dynamics by natural-abundance 13C solid-state NMR
... Numerous studies have shown that the properties of the SC as a barrier to water and other molecules depend on the external RH [24,26,45], and this effect (referred to as skin occlusion) is widely used to increase the ...
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Solubility studies on poly(ethylene oxide) and cellulose
... Figure 5.1 shows a comparison of 13C spectra obtained from amorphous and crystalline cellulose, both in the solid-state CPMAS, and a solution-state NMR spectrum of fully dissolved cellul[r] ...
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Unraveling the complexity of protein backbone dynamics with combined 13C and 15N solid state NMR relaxation measurements
... MHz Solid-state NMR ...MHz Solid-state NMR Facility used in this research was funded by EPSRC and BBSRC, as well as the University of Warwick, including part funding through ...
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Perspective : current advances in solid state NMR spectroscopy
... with NMR spectroscopy in the solid state will remain the subject of ongoing research effort and technological ...for NMR, and for solid-state NMR in ...conventional ...
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Isolation and structure elutidation of coumarin derivate from fruit seeds of Clausena excavata
... The equipment used is of glassware commonly used to study organic chemistry of natural products, a set of tools solvent distillation, rotary evaporator Heidolp WB, 2000, oven, TLC plate (silica gel 60 F254, Merck KGaA ...
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Molecular architecture of softwood revealed by solid state NMR
... solution state three-fold screw indicates the conifer xylan is bound to the cellulose ...CP-PDSD solid-state NMR spectra further shows that xylan does interact with the cellulose ...by ...
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Use of gadolinium in 13C NMR studies
... ABSTRACT , The addition of the reagents paramagnetic gadolinium18- crown-6 nitrate, gadoliniumdicyclohexano-18-crown-6 nitrate, and gadolinium ethylbenzene, nitrate and thymidine has bee[r] ...
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A solid state NMR method for solution of zeolite crystal structures
... for solid-state NMR structural analysis at the University of Southampton, providing only their unit cell parameters and space groups while withholding their ...
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Solid-state NMR of Complex Nano- and Microcrystalline Materials
... the solid sample of interest, and is able to form a spin glass at 100 ...the solid particles or occupies inter-particle void ...current state-of-the-art 1 H DNP NMR experiments involving the ...
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Solid-State NMR of Quadrupolar Nuclei for Structural Elucidation
... two-dimensional NMR technique was developed which correlates multiple- and single-quantum coherences, called multiple-quantum (MQ)MAS, that utilizes conventional MAS ...
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Characterization of Inorganic Catalysts and Materials by Solid-State NMR
... spectra were processed on a personal computer with the Nuts program from Acorn Software. The FIDs of sub-spectra were left-shifted where necessary, apodized using a Gaussian function of less than 100 Hz, digitally ...
447
Biological Membrane Structure By Solid-State NMR
... The steps involved in the determination of protein structures in micelles are the same as those used for globular proteins in aqueous solutions and include the resolution and assignment of backbone and side-chain ...
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Solid state NMR studies of ferroelectric relaxor materials
... Abstract Multi-nuclear solid state nuclear magnetic resonance has been used to investigate the local atomic structure of the relaxor ferroelectric materials, lead magnesium niobate titan[r] ...
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