In Situ Magic-Angle Spinning 7Li NMR Analysis of a Full Electrochemical Lithium-Ion Battery Using a Jelly Roll Cell Design

2019 ◽  
Vol 141 (35) ◽  
pp. 13758-13761 ◽  
Author(s):  
Annica I. Freytag ◽  
Allen D. Pauric ◽  
Sergey A. Krachkovskiy ◽  
Gillian R. Goward
Keyword(s):  
Lithium Ion Battery ◽  
Lithium Ion ◽  
Magic Angle Spinning ◽  
Magic Angle ◽  
Cell Design ◽  
Nmr Analysis ◽  
7Li Nmr ◽  
Angle Spinning ◽  
Jelly Roll

scholarly journals Introduction of Al into the HPM-1 Framework by In Situ Generated Seeds as an Alternative Methodology

2018 ◽  
Vol 8 (9) ◽  
pp. 1634 ◽  
Author(s):  
Paloma Vinaches ◽  
Alex Rojas ◽  
Ana de Alencar ◽  
Enrique Rodríguez-Castellón ◽  
Tiago Braga ◽  
...  
Keyword(s):  
Textural Properties ◽  
Magic Angle Spinning ◽  
Ethanol Conversion ◽  
Magic Angle ◽  
Pure Silica ◽  
Acidic Sites ◽  
Alternative Methodology ◽  
Angle Spinning ◽  
Zeolitic Framework

An alternative method for the introduction of aluminum into the STW zeolitic framework is presented. HPM-1, a chiral STW zeolite with helical pores, was synthesized in the pure silica form, and an aluminum source was added by in situ generated seeds. Displacements of the peak positions in the Al samples were found in the X-ray diffractograms, indicating the possible incorporation of the heteroatom into the framework. Using an analysis of the 29Si and 27Al magic-angle spinning nuclear magnetic resonance (MAS NMR) spectra, we concluded that the aluminum was effectively introduced into the framework. The (AlTETRAHEDRAL/AlOCTAHEDRAL) ratio and its textural properties were studied to explain the catalytic ethanol conversion results at medium temperatures. The sample with the lowest Si/Al ratio showed the best results due to its higher surface area and pore volume, in comparison to those observed for the sample with the highest Si/Al ratio, and due to its higher bulk tetrahedral aluminum content, in comparison to the intermediate Si/Al ratio sample. All catalysts were selective to ethylene and diethyl ether, confirming the presence of acidic sites.

scholarly journals Current Developments in µMAS NMR Analysis for Metabolomics

Metabolites ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 29 ◽  
Author(s):  
Covadonga Lucas-Torres ◽  
Alan Wong
Keyword(s):  
Spectroscopic Analysis ◽  
Magic Angle Spinning ◽  
Quality Data ◽  
Tissue Cell ◽  
Magic Angle ◽  
Nmr Analysis ◽  
Specific Interest ◽  
High Quality Data ◽  
Bulk Specimen ◽  
Angle Spinning

Analysis of microscopic specimens has emerged as a useful analytical application in metabolomics because of its capacity for characterizing a highly homogenous sample with a specific interest. The undeviating analysis helps to unfold the hidden activities in a bulk specimen and contributes to the understanding of the fundamental metabolisms in life. In NMR spectroscopy, micro(µ)-probe technology is well-established and -adopted to the microscopic level of biofluids. However, this is quite the contrary with specimens such as tissue, cell and organism. This is due to the substantial difficulty of developing a sufficient µ-size magic-angle spinning (MAS) probe for sub-milligram specimens with the capability of high-quality data acquisition. It was not until 2012; a µMAS probe had emerged and shown promises to µg analysis; since, a continuous advancement has been made striving for the possibility of µMAS to be an effective NMR spectroscopic analysis. Herein, the mini-review highlights the progress of µMAS development—from an impossible scenario to an attainable solution—and describes a few demonstrative metabolic profiling studies. The review will also discuss the current challenges in µMAS NMR analysis and its potential to metabolomics.

scholarly journals Proton high-resolution magic angle spinning NMR analysis of fresh and previously frozen tissue of human prostate

2003 ◽  
Vol 50 (6) ◽  
pp. 1307-1311 ◽  
Author(s):  
Chin-Lee Wu ◽  
Jennifer L. Taylor ◽  
Wenlei He ◽  
Andrea G. Zepeda ◽  
Elkan F. Halpern ◽  
...  
Keyword(s):  
High Resolution ◽  
Magic Angle Spinning ◽  
Human Prostate ◽  
Magic Angle ◽  
Nmr Analysis ◽  
Frozen Tissue ◽  
Angle Spinning
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