Results 11 to 20 of about 20,208 (255)

Microencapsulated Alkane Wax Melting: Measured by ¹H NMR Relaxometry and Diffusometry. [PDF]

Magn Reson Chem
NMR relaxometry and diffusometry measurements detected greater molecular‐level disordering in microencapsulated n‐alkane waxes versus unencapsulated waxes throughout melting. ABSTRACT Phase change materials (PCMs) are useful for energy storage. Large latent heats make n‐alkane waxes effective PCMs.
Young MC, Nelson ML, Skuntz ME, Codd SL, Anderson R, Seymour JD.   +5 more
europepmc   +2 more sources

Contrast-Enhanced MR Fingerprinting With Delta-Relaxometry: Investigating a New Avenue for Tumor Characterization. [PDF]

J Magn Reson Imaging
ABSTRACT Background MRI contrast agents enhance lesion characterization by altering tissue relaxation properties. However, quantitative assessment of contrast enhancement is limited by variability in contrast administration parameters, and lack of efficient and precise contrast concentration independent relaxivity (r 1, r 2) measurement techniques.
Deng S, Zhao W, Gongala S, Sun JEP, Jordan DW, Flask CA, Griswold MA, Ma D, Badve C.   +8 more
europepmc   +2 more sources

Field Strength-Dependent White Matter R₁ and R₂ Anisotropy of Phase-Cycled Balanced Steady-State Free Precession Relaxometry. [PDF]

Magn Reson Med
ABSTRACT Purpose To investigate how the relaxation rates (R1, R2) and asymmetry indices (AI), derived from phase‐cycled balanced steady‐state free precession (pc‐bSSFP) data, depend on the orientation of white matter (WM) fiber tracts at different field strengths.
Birk F, Tesh H, Aghaeifar A, Klinkowski S, Iyyappan Valsala P, Mueller S, Brodt S, Scheffler K, Heule R.   +8 more
europepmc   +2 more sources

Comprehensive Magnetic Resonance Imaging Relaxometry of Gadolinium-Based Contrast Agents: A Systematic Study of Transmetallation and Transchelation Processes With Zinc Ions and Heparin. [PDF]

ChemMedChem
Water proton relaxometry studies reveal unique signatures for different classes of gadolinium‐based magnetic resonance imaging contrast agents (GBCAs) undergoing transchelation with glycosaminoglycans. While linear nonionic GBCAs exhibit significantly reduced thermodynamic stability during transchelation, they show higher stability during ...
Werner P, Schröder L.
europepmc   +2 more sources

Advanced Interpretation of Field Cycling NMR Relaxometry Dispersion Profiles From Hard and Soft Materials. [PDF]

Magn Reson Chem
This review demonstrates that NMR dispersion profiles from fast field cycling NMR relaxometry can be interpreted with the 3‐Tau model for a broad spectrum of soft and hard materials. Meaningful physical quantities provide insight into surface chemistry, bound water density, pore size, aqueous or solid iron (III) density and the free water diffusion ...
Faux DA, Kogon R.
europepmc   +2 more sources

Quantitative Magnetic Resonance Imaging of the Pancreas of Individuals With Diabetes

Frontiers in Endocrinology, 2020
Magnetic resonance imaging (MRI) has the potential to improve our understanding of diabetes and improve both diagnosis and monitoring of the disease.
John Virostko, John Virostko, John Virostko   +2 more
doaj   +1 more source

Nuclear magnetic resonance cryoporometry [PDF]

, 2008
Nuclear Magnetic Resonance (NMR) cryoporometry is a technique for non-destructively determining pore size distributions in porous media through the observation of the depressed melting point of a confined liquid.
Mitchell, J., Strange, John H., Webber, J. Beau W.   +2 more
core   +1 more source

Electronic Effects of the Substituents on Relaxometric and CEST Behaviour of Ln(III)-DOTA-Tetraanilides

Inorganics, 2019
Three different 1,4,7,10-tetraazacyclododecane-1,4,7,10-tetraacetamide (DOTAM) derivatives bearing as amide N-substituents phenyl, p-methoxyphenyl and p-ethylbenzoate groups were synthesized and the 1H and 17O NMR relaxometric behaviour of the Gd(III ...
Valeria Lagostina, Loredana Leone, Fabio Carniato, Giuseppe Digilio, Lorenzo Tei, Mauro Botta   +5 more
doaj   +1 more source

Proton NMR relaxometry as a useful tool to evaluate swelling processes in peat soils [PDF]

, 2010
Dramatic physical and physico-chemical changes in soil properties may arise due to temperature and moisture variations as well as swelling of soil organic matter (SOM) under constant conditions.
As, H., van, Jaeger, F., Schaumann, G., Shchegolikhina, A.   +3 more
core   +2 more sources

Nuclear Magnetic Resonance with Fast Field-Cycling Setup: A Valid Tool for Soil Quality Investigation

Agronomy, 2020
Nuclear magnetic resonance (NMR) techniques are largely employed in several fields. As an example, NMR spectroscopy is used to provide structural and conformational information on pure systems, while affording quantitative evaluation on the number of ...
Pellegrino Conte, Paolo Lo Meo
doaj   +1 more source