Determining the scaling of gel mesh size with changing crosslinker concentration using dynamic swelling, rheometry, and PGSE NMR spectroscopy

2018 ◽  
Vol 135 (45) ◽  
pp. 46695 ◽  
Author(s):  
Malgorzata Anna Wisniewska ◽  
John Georg Seland ◽  
Wei Wang
Keyword(s):  
Nmr Spectroscopy ◽  
Mesh Size ◽  
Dynamic Swelling ◽  
Crosslinker Concentration ◽  
Pgse Nmr

scholarly journals Relationship between Li+ diffusion and ion conduction for single-crystal and powder garnet-type electrolytes studied by 7Li PGSE NMR spectroscopy

2019 ◽  
Vol 21 (42) ◽  
pp. 23589-23597 ◽  
Author(s):  
Kikuko Hayamizu ◽  
Yasuhiko Terada ◽  
Kunimitsu Kataoka ◽  
Junji Akimoto ◽  
Tomoyuki Haishi
Keyword(s):  
Nmr Spectroscopy ◽  
Ionic Conductivity ◽  
Single Crystal ◽  
Ion Conduction ◽  
Diffusion Constants ◽  
Pgse Nmr

Li-diffusion constants of single-crystal and powder garnets were determined and plotted versus ionic conductivity. Estimated NE carrier numbers were larger than atomic Li numbers for metal containing garnets and insensitive to temperature.

Quantification of Chlorogenic Acid and Hyperoside Directly from Crude Blueberry (Vaccinium angustifolium) Leaf Extract by NMR Spectroscopy Analysis: Single-Laboratory Validation

2012 ◽  
Vol 95 (5) ◽  
pp. 1406-1411 ◽  
Author(s):  
Joshua M Hicks ◽  
Asim Muhammad ◽  
Jonathan Ferrier ◽  
Ammar Saleem ◽  
Alain Cuerrier ◽  
...  
Keyword(s):  
Nmr Spectroscopy ◽  
Chlorogenic Acid ◽  
Mesh Size ◽  
Array Detector ◽  
Spectroscopy Analysis ◽  
Vaccinium Angustifolium ◽  
Spectroscopy Experiment ◽  
Tube Type ◽  
Significant Interference ◽  
Single Laboratory

Abstract A single-laboratory-validated NMR spectroscopy method was established for determining the quantity of chlorogenic acid and hyperoside from crude extract material of blueberry leaves of the species Vaccinium angustifolium var. laevifolium House. The calibration curve of chlorogenic acid showed a highly linear regression, R = 0.99998. NMR spectroscopy identification and quantification of the constituents directly from the mixture, within the error of HPLC-diode array detector analysis, were determined as 7.53 mM chlorogenic acid (64.0 mg chlorogenic acid/g powdered leaf) and 0.77 mM hyperoside (8.58 mg hyperoside/g powdered leaf). The LOD was calculated to be 0.01 mM and the LOQ 0.01 mM by the 9 min and 13 s NMR spectroscopy experiment utilized. The assay showed no significant interference from different field strengths, extraction mesh size, gravimetric scale precision, NMR spectroscopy tube type, pulse program, amount of starting dry material, or day-to-day operation. The robustness of NMR spectroscopy as a means of definitively monitoring chlorogenic acid and hyperoside content directly from crude extracts was demonstrated by Youden statistical analysis.

Thermal dynamics of lithium salt mixtures of ionic liquid in water by PGSE NMR spectroscopy

RSC Advances ◽  
2016 ◽  
Vol 6 (43) ◽  
pp. 36394-36406 ◽  
Author(s):  
Raju Nanda
Keyword(s):  
Ionic Liquid ◽  
Nmr Spectroscopy ◽  
Lithium Salt ◽  
Thermal Dynamics ◽  
Salt Mixtures ◽  
Pgse Nmr

The dynamics of ionic liquid–H2O–Li+ salt mixtures have been studied through PGSE NMR spectroscopy.

Analysis of the mesh size in a supramolecular hydrogel by PFG-NMR spectroscopy

Soft Matter ◽  
2013 ◽  
Vol 9 (22) ◽  
pp. 5483 ◽  
Author(s):  
Matthew Wallace ◽  
Dave J. Adams ◽  
Jonathan A. Iggo
Keyword(s):  
Nmr Spectroscopy ◽  
Mesh Size ◽  
Supramolecular Hydrogel ◽  
Pfg Nmr

Mesh size analysis of cellulose nanofibril hydrogels using solute exclusion and PFG-NMR spectroscopy

Soft Matter ◽  
2015 ◽  
Vol 11 (47) ◽  
pp. 9201-9210 ◽  
Author(s):  
Leila Jowkarderis ◽  
Theo G. M. van de Ven
Keyword(s):  
Nmr Spectroscopy ◽  
Mesh Size ◽  
Translational Diffusion ◽  
Size Analysis ◽  
Cellulose Nanofibril ◽  
Echo Intensity ◽  
Solute Exclusion ◽  
Pfg Nmr ◽  
Gel Network

The decay of the NMR echo intensity due to translational diffusion in the heterogeneous gel network is biexponential.

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