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Showing 1 to 12 of 160 entries
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Fast acquisition of multidimensional NMR spectra of solids and mesophases using alternative sampling methods.

Magnetic resonance in chemistry : MRC

Lesot P, Kazimierczuk K, Trébosc J, Amoureux JP, Lafon O.
PMID: 26332109
Magn Reson Chem. 2015 Nov;53(11):927-39. doi: 10.1002/mrc.4290. Epub 2015 Aug 31.

Unique information about the atom-level structure and dynamics of solids and mesophases can be obtained by the use of multidimensional nuclear magnetic resonance (NMR) experiments. Nevertheless, the acquisition of these experiments often requires long acquisition times. We review here...

Rapid and safe ASAP acquisition with EXACT NMR.

Chemical communications (Cambridge, England)

Ndukwe IE, Shchukina A, Kazimierczuk K, Butts CP.
PMID: 27727337
Chem Commun (Camb). 2016 Oct 20;52(86):12769-12772. doi: 10.1039/c6cc07140f.

The dangerously high power levels required for fast ASAP-HSQC and ASAP-HMQC experiments are mitigated by employing EXACT NMR. The utility of this technique is demonstrated by application of the EXACT ASAP-HSQC to chemical reaction monitoring, accelerating data acquisition by...

Association between Asymptomatic Unilateral Internal Carotid Artery Stenosis and Electrophysiological Function of the Retina and Optic Nerve.

Journal of ophthalmology

Machalińska A, Kowalska-Budek A, Kawa MP, Kazimierczak A, Safranow K, Kirkiewicz M, Wilk G, Lubiński W, Gutowski P, Machaliński B.
PMID: 28491467
J Ophthalmol. 2017;2017:4089262. doi: 10.1155/2017/4089262. Epub 2017 Apr 11.

No abstract available.

Monitoring polydispersity by NMR diffusometry with tailored norm regularisation and moving-frame processing.

The Analyst

Urbańczyk M, Bernin D, Czuroń A, Kazimierczuk K.
PMID: 26824089
Analyst. 2016 Mar 07;141(5):1745-52. doi: 10.1039/c5an02304a.

Nuclear magnetic resonance (NMR) is currently one of the main analytical techniques applied in numerous branches of chemistry. Furthermore, NMR has been proven to be useful to follow in situ reactions occurring on a time scale of hours and...

Two-dimensional NMR spectroscopy with temperature-sweep.

Chemphyschem : a European journal of chemical physics and physical chemistry

Bermel W, Dass R, Neidig KP, Kazimierczuk K.
PMID: 24863674
Chemphyschem. 2014 Aug 04;15(11):2217-20. doi: 10.1002/cphc.201402191. Epub 2014 May 26.

Two-dimensional nuclear magnetic resonance (NMR) spectroscopy is useful for studying temperature-dependent effects on molecular structure. However, experimental time is usually long, because sampling is repeated at several temperatures. A novel solution to the problem is proposed, in which signal...

Comparison of magneto-optical properties of various excitonic complexes in CdTe and CdSe self-assembled quantum dots.

Journal of physics. Condensed matter : an Institute of Physics journal

Kobak J, Smoleński T, Goryca M, Rousset JG, Pacuski W, Bogucki A, Oreszczuk K, Kossacki P, Nawrocki M, Golnik A, Płachta J, Wojnar P, Kruse C, Hommel D, Potemski M, Kazimierczuk T.
PMID: 27173643
J Phys Condens Matter. 2016 Jul 06;28(26):265302. doi: 10.1088/0953-8984/28/26/265302. Epub 2016 May 13.

We present a comparative study of two self-assembled quantum dot (QD) systems based on II-VI compounds: CdTe/ZnTe and CdSe/ZnSe. Using magneto-optical techniques we investigated a large population of individual QDs. The systematic photoluminescence studies of emission lines related to...

A Novel Method of Determining the Functional Effects of a Minor Genetic Modification of a Protein.

Frontiers in cardiovascular medicine

Nagwekar J, Duggal D, Midde K, Rich R, Liang J, Kazmierczak K, Huang W, Fudala R, Gryczynski I, Gryczynski Z, Szczesna-Cordary D, Borejdo J.
PMID: 26664906
Front Cardiovasc Med. 2015 Nov 18;2:35. doi: 10.3389/fcvm.2015.00035. eCollection 2015.

Contraction of muscles results from the ATP-coupled cyclic interactions of the myosin cross-bridges with actin filaments. Macroscopic parameters of contraction, such as maximum tension, speed of shortening, or ATPase activity, are unlikely to reveal differences between the wild-type and...

Optical manipulation of a single Mn spin in a CdTe-based quantum dot.

Physical review letters

Goryca M, Kazimierczuk T, Nawrocki M, Golnik A, Gaj JA, Kossacki P, Wojnar P, Karczewski G.
PMID: 19792759
Phys Rev Lett. 2009 Aug 21;103(8):087401. doi: 10.1103/PhysRevLett.103.087401. Epub 2009 Aug 17.

Two coupled CdTe quantum dots, selected from a self-assembled system, one of them containing a single Mn ion, were studied by continuous wave and modulated photoluminescence, photoluminescence excitation, and photon correlation experiments. Optical writing of information on the spin...

Iterative thresholding algorithm for multiexponential decay applied to PGSE NMR data.

Analytical chemistry

Urbańczyk M, Bernin D, Koźmiński W, Kazimierczuk K.
PMID: 23297715
Anal Chem. 2013 Feb 05;85(3):1828-33. doi: 10.1021/ac3032004. Epub 2013 Jan 22.

Pulsed gradient spin echo (PGSE) is a well-known NMR technique for determining diffusion coefficients. Various signal processing techniques have been introduced to solve the task, which is especially challenging when the decay is multiexponential with an unknown number of...

Silver complexes stabilized by large silanethiolate ligands - crystal structures and luminescence properties.

Dalton transactions (Cambridge, England : 2003)

Ciborska A, Hnatejko Z, Kazimierczuk K, Mielcarek A, Wiśniewska A, Dołęga A.
PMID: 28795747
Dalton Trans. 2017 Aug 22;46(33):11097-11107. doi: 10.1039/c7dt00740j.

Bulky silanethiolate and disiladithiolate ligands were applied to synthesize one mononuclear and three trinuclear silver complexes including two cyclic "microclusters" and a linear tri-nuclear silanethiolate complex. All obtained compounds are characterized by X-ray diffraction and FT-IR. NMR and emission...

Quick, sensitive serial NMR experiments with Radon transform.

Journal of magnetic resonance (San Diego, Calif. : 1997)

Dass R, Kasprzak P, Kazimierczuk K.
PMID: 28797925
J Magn Reson. 2017 Sep;282:114-118. doi: 10.1016/j.jmr.2017.07.011. Epub 2017 Jul 31.

The Radon transform is a potentially powerful tool for processing the data from serial spectroscopic experiments. It makes it possible to decode the rate at which frequencies of spectral peaks shift under the effect of changing conditions, such as...

Monitoring Hydrogenation Reactions using Benchtop 2D NMR with Extraordinary Sensitivity and Spectral Resolution.

ChemistryOpen

Gołowicz D, Kazimierczuk K, Urbańczyk M, Ratajczyk T.
PMID: 30815327
ChemistryOpen. 2019 Feb 14;8(2):196-200. doi: 10.1002/open.201800294. eCollection 2019 Feb.

Low-field benchtop nuclear magnetic resonance (BT-NMR) spectrometers with Halbach magnets are being increasingly used in science and industry as cost-efficient tools for the monitoring of chemical reactions, including hydrogenation. However, their use of low-field magnets limits both resolution and...

Showing 1 to 12 of 160 entries