Results 31 to 40 of about 176,666 (301)

Proton magnetic resonance spectroscopy: clinical applications in patients with brain lesions

São Paulo Medical Journal
CONTEXT: Proton spectroscopy has been recognized as a safe and noninvasive diagnostic method that, coupled with magnetic resonance imaging techniques, allows for the correlation of anatomical and physiological changes in the metabolic and biochemical ...
Sérgio Luiz Ramin, Waldir Antonio Tognola, Antonio Ronaldo Spotti   +2 more
doaj   +1 more source

Experimental Heat-Bath Cooling of Spins [PDF]

, 2014
Algorithmic cooling (AC) is a method to purify quantum systems, such as ensembles of nuclear spins, or cold atoms in an optical lattice. When applied to spins, AC produces ensembles of highly polarized spins, which enhance the signal strength in nuclear ...
Brassard, Gilles, Elias, Yuval, Fernandez, José M., Gilboa, Haggai, Jones, Jonathan A., Mor, Tal, Weinstein, Yossi, Xiao, Li   +7 more
core   +2 more sources

Intramolecular hydrogen bonds in 1,4-dihydropyridine derivatives [PDF]

Royal Society Open Science, 2018
1,4-Dihydropyridine (1,4-DHP) derivatives have been synthesized and characterized by 1H, 13C, 15N nuclear magnetic resonance (NMR) spectroscopy, secondary proton/deuterium 13C isotope shifts, variable temperature 1H NMR experiments and quantum-chemical ...
M. Petrova, R. Muhamadejev, B. Vigante, G. Duburs, Edvards Liepinsh   +4 more
doaj   +1 more source

Ideal Molecular Sieving with a Dense MOF for Helium Upgrading with Highly Diffusion Selective Mixed Matrix Membranes

Advanced Functional Materials, EarlyView.
The separation of Helium gas from natural gas is challenging but highly important. MIL‐116(Ga), a “non‐porous” metal–organic framework is used as a molecular sieve to separate He from CH4. Druse‐like MIL‐116(Ga) particles are integrated into polysulfone mixed matrix membranes.
Ayisha Komal, Laura Calderón‐Rodríguez, Oksana Smirnova, Eren Grossmann, Aparna Binu Varghese, Karen Marlenne Garcia Alvarez, Andreas Schneemann, Thomas Hoyer, Ralf Wyrwa, Felix Helmut Schacher, Alexander Knebel   +10 more
wiley   +1 more source

Thalamic Glutamate/Glutamine in Restless Legs Syndrome

Pediatric Neurology Briefs, 2013
Investigators at Johns Hopkins University, Baltimore, MD, studied glutaminergic activity and arousal in 28 adults with restless legs syndrome (RLS) and 20 matched controls, using proton magnetic resonance spectroscopy.
J Gordon Millichap
doaj   +1 more source

Electroactive Metal–Organic Frameworks for Electrocatalysis

Advanced Functional Materials, EarlyView.
Electrocatalysis is crucial in sustainable energy conversion as it enables efficient chemical transformations. The review discusses how metal–organic frameworks can revolutionize this field by offering tailorable structures and active site tunability, enabling efficient and selective electrocatalytic processes.
Irena Senkovska, Yutong Luo, Ruyan Zhao, Jianjun Zhang, Mingchao Wang, Xinliang Feng, Eike Brunner, Stefan Kaskel   +7 more
wiley   +1 more source

Detection of Metabolites by Proton Ex Vivo NMR, in Vivo MR Spectroscopy Peaks and Tissue Content Analysis: Biochemical-Magnetic Resonance Correlation: Preliminary Results [PDF]

, 2009
*Aim*: Metabolite concentrations by in vivo magnetic resonance spectroscopy and ex vivo NMR spectroscopy were compared with excised normal human tissue relaxation times and tissue homogenate contents. *Hypothesis*: Biochemical analysis
Arun Agrawala, Madan Rehani, Rakesh Sharma   +2 more
core   +1 more source

Heteronuclear Decoupling by Multiple Rotating Frame Technique [PDF]

, 2010
The paper describes the multiple rotating frame technique for designing modulated rf-fields, that perform broadband heteronuclear decoupling in solution NMR spectroscopy. The decoupling is understood by performing a sequence of coordinate transformations,
Anderson, Anderson, Barker, Bendall, Benett, Bottomley, Cavanagh, Chen, Cho, de Graaf, Detken, Dyksstra, Eden, Eggenberger, Ernst, Ernst, Freeman, Freeman, Fu, Fu, Fujiwara, Fujiwara, Fung, Gan, Geen, Geen, Gerhard Wagner, Glaser, Haeberlen, Haeberlen, Haribabu Arthanari, Hwang, Jacobs, Kotyk, Kupce, Kupce, Kupce, Levitt, Levitt, Levitt, Levitt, Levitt, Li, Lizak, McCoy, Navin Khaneja, Neves, Shaka, Shaka, Shaka, Shaka, Shaka, Skinner, Skinner, Sklenar, Starcuk, Sunitha Bai, Suter, Takegoshi, Tycko, Tycko, Waugh, Yu, Zhang, Zhou, Zuiderweg   +65 more
core   +1 more source

Auto‐Generated Valence States in Electrocatalysts for Boosting Oxygen and Hydrogen Evolution Kinetics in Alkaline Water/Alkaline Seawater/Simulated Seawater/Natural Seawater

Advanced Functional Materials, EarlyView.
This review systematically highlights the latest achievements in mixed‐valence states relevant to hydrogen and oxygen evolution reactions, providing essential insights into future directions and methods for large‐scale practical implementation. This critical review is expected to provide an overview of recent advancements in diverse valence‐state metal
Jitendra N. Tiwari, Gokul Bhaskaran, Krishan Kumar, Yun Suk Huh, Young‐Kyu Han   +4 more
wiley   +1 more source

Proton Magnetic Resonance Spectroscopy in Social Anxiety Disorder [PDF]

The Journal of Neuropsychiatry and Clinical Neurosciences, 2016
In the present study, 24 nonmedicated patients with social anxiety disorder (SAD) were compared with 24 healthy control subjects to assess metabolite levels in the anterior cingulate, insula, caudate, and putamen using proton magnetic resonance spectroscopy.
Raşit, Tükel, Kubilay, Aydın, Çağrı, Yüksel, Erhan, Ertekin, Ahmet, Koyuncu   +4 more
openaire   +2 more sources