scholarly journals Composition dependent transport diffusion in non-ideal mixtures from spatially resolved nuclear magnetic resonance spectroscopy

2018 ◽  
Vol 20 (44) ◽  
pp. 28185-28192 ◽  
Author(s):  
Christian F. Pantoja ◽  
Y. Mauricio Muñoz-Muñoz ◽  
Lorraine Guastar ◽  
Jadran Vrabec ◽  
Julien Wist
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Diffusion Coefficient ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Spatially Resolved ◽  
Transport Diffusion ◽  
Dependent Transport ◽  
Nuclear Magnetic

Nuclear magnetic resonance (NMR) spectroscopy can also be used for the measurement of the Fick diffusion coefficient.

Uses of Nuclear Magnetic Resonance Spectroscopy Technique in Pharmaceutical Analysis: A Review

2017 ◽  
Vol 8 (02) ◽  
Author(s):  
Imad Hadi Zohra ◽  
Abeer Fauzi Al-Rubaye ◽  
Mohanad Jawad Kadhim
Keyword(s):  
Magnetic Field ◽  
Nuclear Magnetic Resonance ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Nuclear Magnetic Resonance Spectroscopy ◽  
Ratio Method ◽  
Resonance Spectroscopy ◽  
Spectroscopic Techniques ◽  
Nuclear Magnetic

Nuclear magnetic resonance (NMR) is a physical phenomenon in which nuclei in a magnetic field absorb and re-emit electromagnetic radiation. Many scientific techniques exploit NMR phenomena to study molecular physics, crystals, and non-crystalline materials through nuclear magnetic resonance spectroscopy. NMR phenomena are also utilized in low-field NMR, NMR spectroscopy and MRI in the Earth's magnetic field (referred to as Earth's field NMR), and in several types of magnetometers. Modern NMR spectroscopy has been emphasizing the application in biomolecular systems and plays an important role in structural biology. NMR spectroscopy is very important to identify a drug or an excipient, evaluate the level of impurities (and to elucidate the structure), observe the course of a decomposition, to evaluate residual solvents, determine the isomeric composition, i.e. the ratio of diastereomers and the enantiomeric excess by means of chiral additive, assess a single drug or drug composition, characterize a polymer mostly being a mixture and used as excipients, identify counter ions (if of organic origin and having protons), characterize an entire formulation, e.g. a tablet. Fundamentals of quantitative NMR spectroscopy NMR spectroscopy can be considered as a primary ratio method of measurement being characterized by the fact that the ratio of substances can be determined directly from the physical context of the measurement without referencing to another substance. NMR has become one of the most powerful and versatile spectroscopic techniques for the analysis of biomacromolecules, allowing characterization of biomacromolecules and their complexes up to 100 kDa. Together with X-ray crystallography.

scholarly journals High-resolution nuclear magnetic resonance spectroscopy in microfluidic droplets

Lab on a Chip ◽  
2018 ◽  
Vol 18 (19) ◽  
pp. 3018-3024 ◽  
Author(s):  
William Hale ◽  
Gabriel Rossetto ◽  
Rachael Greenhalgh ◽  
Graeme Finch ◽  
Marcel Utz
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Magnetic Susceptibility ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Magnetic Resonance Spectroscopy ◽  
Nuclear Magnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Microfluidic Droplets ◽  
Nuclear Magnetic

Combining structural shimming with paramagnetic doping removes magnetic susceptibility mismatches, allowing meaningful NMR spectroscopy of microfluidic droplet emulsions.

scholarly journals Microfluidic platform for serial mixing experiments with in operando nuclear magnetic resonance spectroscopy

Lab on a Chip ◽  
2021 ◽  
Vol 21 (8) ◽  
pp. 1598-1603
Author(s):  
Marek Plata ◽  
William Hale ◽  
Manvendra Sharma ◽  
Jörn M. Werner ◽  
Marcel Utz
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Nuclear Magnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Microfluidic Platform ◽  
In Operando ◽  
Nuclear Magnetic ◽  
Pressure Driven

Coupling of pressure-driven microfuidics and NMR spectroscopy allows in operando observation of serial mixing experiments.

scholarly journals G73e Nuclear Magnetic Resonance Spectroscopy of Germanium Compounds

2012 ◽  
Vol 2012 ◽  
pp. 1-18 ◽  
Author(s):  
Charles S. Weinert
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Solid State ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Nuclear Magnetic Resonance Spectroscopy ◽  
Spectral Properties ◽  
Resonance Spectroscopy ◽  
Germanium Compounds ◽  
Nuclear Magnetic

The field of G73e NMR spectroscopy is reviewed in this paper, from early developments in the 1950s to present day research. Specific attention is paid to recent investigations, including the observation of fluxional behavior of hypervalent germanium species having five or six attached ligands by 73Ge NMR spectroscopy, the spectral properties of linear and branched oligogermanes that contain single germanium-germanium bonds, and the relatively new field of solid-state germanium-73 NMR.

Temperature-dependent 51V nuclear magnetic resonance spectroscopy for the positive electrolyte of vanadium redox flow batteries

RSC Advances ◽  
2016 ◽  
Vol 6 (99) ◽  
pp. 96847-96852 ◽  
Author(s):  
Soohyun Kim ◽  
Chanyong Choi ◽  
Riyul Kim ◽  
Hyun Gyu Kim ◽  
Hee-Tak Kim
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Nuclear Magnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Temperature Dependent ◽  
Redox Flow Batteries ◽  
Vanadium Redox ◽  
Nuclear Magnetic

By intentionally adding VO2+ in VO2+ electrolyte, a clearer detection of the VO(OH)3 signal was demonstrated with 51V NMR spectroscopy.

scholarly journals Nuclear Magnetic Resonance Spectroscopy Applications In Foods

2016 ◽  
Vol 4 (Special-Issue-October) ◽  
pp. 161-168 ◽  
Author(s):  
Yeliz Parlak ◽  
Nuray Güzeler
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Magnetic Resonance Spectroscopy ◽  
Nuclear Magnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
Magic Angle ◽  
Nmr Techniques ◽  
Nuclear Magnetic

Nuclear magnetic resonance spectroscopy (NMR) is the most powerful technique for determining the structure of organic compounds. NMR techniques are used successfully in various food systems for quality control and research. NMR spectroscopy is used to determine structure of proteins, aminoacid profile, carotenoids, organic acids, lipid fractions, the mobility of the water in foods. NMR spectroscopy is also used to identify and quantify the metabolites in foods. Also vegetable oils, fish oils, fish and meat, milk, cheese, wheat, fruit juices, coffee, green tea, foods such as wine and beer are among the last NMR applications. In addition, NMR spectroscopy is utilized for foodomics which is a new discipline that brings food science and nutritional research together. NMR techniques used for the food authentication are one- and two-dimensional NMR techniques, high resolution liquid state 1H and 13C NMR techniques, N15 and P-31 NMR techniques, 1H HR/MAS (high resolution magic angle spinning) NMR techniques. At this study, usage purposes of nuclear magnetic resonance spectroscopy for foods were collected.

Flexible lipid nanomaterials studied by NMR spectroscopy

2019 ◽  
Vol 21 (34) ◽  
pp. 18422-18457 ◽  
Author(s):  
K. J. Mallikarjunaiah ◽  
Jacob J. Kinnun ◽  
Horia I. Petrache ◽  
Michael F. Brown
Keyword(s):  
Nuclear Magnetic Resonance ◽  
Solid State ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Nuclear Magnetic Resonance Spectroscopy ◽  
Material Properties ◽  
Membrane Lipid ◽  
Resonance Spectroscopy ◽  
Nuclear Magnetic

Advances in solid-state nuclear magnetic resonance spectroscopy inform the emergence of material properties from atomistic-level interactions in membrane lipid nanostructures.

Quantitative Determination of Sodium Dodecatungstosilicate Speciation by 183W Nuclear Magnetic Resonance Spectroscopy

2002 ◽  
Vol 55 (4) ◽  
pp. 281 ◽  
Author(s):  
B. J. Smith ◽  
V. A. Patrick
Keyword(s):  
Aqueous Solution ◽  
Nuclear Magnetic Resonance ◽  
Nmr Spectroscopy ◽  
Magnetic Resonance ◽  
Magnetic Resonance Spectroscopy ◽  
Resonance Spectroscopy ◽  
High Concentration ◽  
Ph Range ◽  
Nuclear Magnetic

The speciation and equilibria of sodium dodecatungstosilicate has been determined using 183W nuclear magnetic resonance (NMR) spectroscopy over the pH range 3-13.5. The use of NMR allowed the direct observation of polytungstate anions in aqueous solution and at high concentration (0.5 mol L-1). Using this technique, the speciation of α-[SiW12O40]4-, α-[SiW11O39]8-, α-[NaSiW11O39]7-, α-[H2W12O40]6-, [H8W11O40]6-, [H7W11O40]7-, [W7O24]6-, [H2W12O42]10-, and WO42- was quantified as a function of pH. This work has allowed stability constants for α-[SiW12O40]4- (log K 46) and α-[SiW11O39]8- (log K 86) to be estimated.

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