Atomic distribution in crystalline II-IV-V2 semiconductor alloys: phosphorus-31 and cadmium-113 magic angle spinning, spin-echo, and 31P-113Cd spin-echo double-resonance NMR studies of the systems zinc germanium arsenide phosphide (ZnGeAs2-xPx) and cadmium germanium arsenide phosphide (CdGeAs2-xPx)

1992 ◽  
Vol 96 (4) ◽  
pp. 1906-1915 ◽  
Author(s):  
Deanna Franke ◽  
Kesha Banks ◽  
Robert Maxwell ◽  
Hellmut Eckert
Keyword(s):  
Spin Echo ◽  
Double Resonance ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Semiconductor Alloys ◽  
Nmr Studies ◽  
Atomic Distribution ◽  
Angle Spinning ◽  
Cadmium Germanium Arsenide

Multinuclear Solid-State High-Resolution and13C -{27Al} Double-Resonance Magic-Angle Spinning NMR Studies on Aluminum Alkoxides

2006 ◽  
Vol 110 (13) ◽  
pp. 6553-6560 ◽  
Author(s):  
Anuji Abraham ◽  
Roel Prins ◽  
Jeroen A. van Bokhoven ◽  
Ernst R. H. van Eck ◽  
Arno P. M. Kentgens
Keyword(s):  
Solid State ◽  
High Resolution ◽  
Double Resonance ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Nmr Studies ◽  
Angle Spinning

scholarly journals High-resolution magic angle spinning NMR studies for metabolic characterization of Arabidopsis thaliana mutants with enhanced growth characteristics

PLoS ONE ◽  
2018 ◽  
Vol 13 (12) ◽  
pp. e0209695 ◽  
Author(s):  
Dieuwertje Augustijn ◽  
Niels van Tol ◽  
Bert J. van der Zaal ◽  
Huub J. M. de Groot ◽  
A. Alia
Keyword(s):  
Arabidopsis Thaliana ◽  
High Resolution ◽  
Magic Angle Spinning ◽  
Growth Characteristics ◽  
Magic Angle ◽  
Nmr Studies ◽  
Angle Spinning

Characterization of metallurgical-grade aluminas and their precursors by 27Al NMR and XRD

2007 ◽  
Vol 85 (10) ◽  
pp. 889-897 ◽  
Author(s):  
Linus M Perander ◽  
Zoran D Zujovic ◽  
Tania Groutso ◽  
Margaret M Hyland ◽  
Mark E Smith ◽  
...  
Keyword(s):  
Solid State ◽  
High Field ◽  
Structural Complexity ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Nmr Studies ◽  
Transition Alumina ◽  
Angle Spinning ◽  
Alpha Alumina

The structure of metallurgical- or smelter-grade aluminas (MGAs) is complex and poorly understood. Ultra-high-field solid-state 27Al NMR results on industrial as well as on laboratory-prepared aluminas are discussed in relation to XRD results. It is demonstrated that high-field NMR can effectively be used to quantify the proportion of the thermodynamically stable alpha-alumina phase in these materials. The results demonstrate that 27Al NMR is a vital adjunct to XRD methods to quantify the transition alumina phases that invariably dominate the MGAs. The nature of the disorder in these materials, determined by 27Al NMR, is also compared with literature data, such as XANES and EXAFS studies, on typical laboratory-prepared materials. The utility of 27Al NMR studies to provide new insight into the structural complexity of metallurgical aluminas is shown.Key words: solid-state magic-angle-spinning NMR, metallurgical-grade alumina, transition alumina, gamma-alumina, coordination number.

Proton Magic Angle Spinning NMR Reveals New Features in Photodynamically Treated Bacteria

2003 ◽  
Vol 58 (5-6) ◽  
pp. 401-407 ◽  
Author(s):  
Yngve Johansen ◽  
Hege Christin Widerøe ◽  
Jostein Krane ◽  
Anders Johnsson ◽  
Anders Johnsson
Keyword(s):  
Blue Light ◽  
Glycine Betaine ◽  
Aminolevulinic Acid ◽  
Irradiation Time ◽  
Regulatory Volume Decrease ◽  
Magic Angle Spinning ◽  
Eukaryotic Cells ◽  
Magic Angle ◽  
Nmr Studies ◽  
Angle Spinning

Abstract The bacterium Propionibacterium acnes is light-sensitive due to porphyrin-induced photosensitization. The light sensitivity increases with incubation of 5-aminolevulinic acid, ALA. For the first time, 1H magic angle spinning NMR spectroscopy is used to describe the photoinduced changes in the bacterium after ALA incubation. Successful photosensitization was performed with light-emitting diodes in the blue and red regions (430 and 654 nm, respectively). The irradiation setup, suitable for irradiation of bacaterium suspensions in petri dishes is described. For NMR studies blue light diodes with about 90 μmol/m2s were chosen. After blue light irradiation, the endogenous glycine betaine, proline, glutamate and choline levels in P. acnes decreased with increasing irradiation time. For sublethal light doses (50% survival fraction), the endogenous glycine betaine level decreased 80% on average. The corresponding percentages for proline, choline and glutamate were about 40, 25 and 10, respectively. It is hypothesized that the irradiation, inducing porphyrin photosensitization amplified by ALA incubation, leads to elimination of the osmolyte glycine betaine and possibly also proline by so-called regulatory volume decrease (RVD) mechanisms. These mechanisms are known to be active in several prokaryotic and eukaryotic cells when exposed to hypotonic stress. They are also known to be present in several eukaryotic cells during photodynamic therapy (PDT) exposure leading to hypotonoc stress. The findings contribute to the knowledge of the inactivation mechanisms of P. acnes in photosensitization, and could therefore be of interest in the efforts to use PDT as treatment of the acne disease.

Metabolic Profiling of Lung Granuloma inMycobacterium tuberculosisInfected Guinea Pigs: Ex vivo1H Magic Angle Spinning NMR Studies

2011 ◽  
Vol 10 (9) ◽  
pp. 4186-4195 ◽  
Author(s):  
B. S. Somashekar ◽  
Anita G. Amin ◽  
Christopher D. Rithner ◽  
JoLynn Troudt ◽  
Randall Basaraba ◽  
...  
Keyword(s):  
Metabolic Profiling ◽  
Guinea Pigs ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Nmr Studies ◽  
Angle Spinning
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