Electron paramagnetic resonance spectroscopy

Part 2 book "Nitrogen fixation - Methods and protocols" includes content: X-Ray crystallography; X-ray absorption spectroscopy, small angle X-ray scattering spectroscopy; electron paramagnetic resonance spectroscopy; magnetic circular dichroism spectroscopy; mössbauer spectroscopy; nitrogenase structure and function relationships by density functional theory; modeling the mofe nitrogenase system with broken symmetry density functional theory.

182p dianmotminh04 12-07-2024 0 0   Download

Ebook "Modified nucleic acids" spans diverse aspects of modified nucleic acids, from chemical synthesis and spectroscopy to in vivo applications, and highlights studies on chemical modifications of the backbone and nucleobases. Topics discussed include fluorescent pyrimidine and purine analogs, enzymatic approaches to the preparation of modified nucleic acids, emission and electron paramagnetic resonance (EPR) spectroscopy for studying nucleic acid structure and dynamics, non-covalent binding of low- and high-MW ligands to nucleic acids and the design of unnatural base pairs.

280p ladongphongthanh1008 22-04-2024 3 1   Download

Ebook "Electron paramagnetic resonance: Elementary theory and practical applications (Second edition)" provides an introduction to the underlying theory, fundamentals, and applications of EPR spectroscopy, as well as new developments in the area. Knowledge of the topics presented will allow the reader to interpret of a wide range of EPR spectra, as well as help them to apply EPR techniques to problem solving in a wide range of areas: organic, inorganic, biological, and analytical chemistry; chemical physics, geophysics, and minerology.

687p coduathanh1122 27-03-2024 2 1   Download

Ebook "Electron spin resonance spectroscopy of organic radicals" is the method used to determine the structure and life expectancy of a number of radicals. Written by Fabian Gerson and Walter Huber, top experts in the field of electron spin resonance spectroscopy, this book offers a compact yet readily comprehensible introduction to the modern world of ESR.

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A low field benchtop electron spin resonance (ESR) (also referred to as electron paramagnetic resonance (EPR)) spectrometer is used to reveal paramagnetic centres such as oxygen vacancies and Ti+3 centres over 0.5%Pd/TiO2 . The measurement was performed at room temperature after the sample was reduced in situ under mild hydrogen pressures and evacuated to P < 10–6 Torr.

8p lyhuyenthu 31-01-2023 7 2   Download

The identification of the defects and secondary phases which significantly affect the material properties are of crucial importance. In this study, a systematic structure examination of PbTiO3 and cobalt doped PbTiO3 powder ceramics was carried out. X-ray diffraction (XRD), Fourier-transform infrared (FT-IR), Raman, and electron paramagnetic resonance (EPR) spectroscopies were applied along with nonsimultaneous thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC).

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Use of spin labels to study structures of polymers has been widely spread in polymer science. However, for the studies of neutral water-soluble dietary fibers (DFs), labelling efficiencies in past studies have only been sufficient for application of continuous wave electron paramagnetic resonance spectroscopy (CW-EPR), but still insufficient for some advanced methods such as pulse EPR.

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Schiff base derivatives NBAR and NSAR were developed for selective detection of Al3+ in aqueous solution. UV-vis spectroscopic studies revealed that NBAR and NSAR showed marked sensitivity and selectivity to Al3+ in acetonitrile (ACN)/water (v/v, 1:1, pH 6.80). The NBAR and NSAR receptors bound Al3+ in a 2:1 stoichiometry with apparent binding constants 4.09 × 10 11 M−2 and 1.65 × 10 12 M−2, respectively. They also displayed distinct changes in color upon the alteration of free Al3+ levels in solution with reversible responses and showed little interference with other metal ions.

10p langthannam 29-12-2021 3 0   Download

(bq) part 2 book "a complete introduction to modern nmr spectroscopy" has contents: the study of dynamic processes by nmr; electron paramagnetic resonance spectroscopy and chemically induced dynamic nuclear polarization; double resonance techniques and complex pulse sequences, two-dimensional nuclear magnetic resonance, nmr studies of biological important molecules,...and other contents.

186p bautroibinhyen20 06-03-2017 57 8   Download

Quercetin 2,3-dioxygenase (2,3QD) is a copper-containing dioxygenase that catalyses the oxidation of the flavonol quercetin to 2-protocatechuoylphloroglucinol carboxylic acid with concomitant production of carbon monoxide. In contrast to iron dioxygenases, very little is known about copper dioxygenases. We have characterized 2,3QD from the fungus Aspergillus japonicus by electron paramagnetic resonance spectroscopy (EPR). At pH 6.0, 2,3QD shows a mixture of two EPR species. The major form has parameters typical of type 2 Cu sites (g// ¼ 2.330, A// ¼ 13.

9p system191 01-06-2013 27 4   Download

Conventional and saturation transfer electron paramagnetic resonance spectroscopy (EPR and ST EPR) was used to study the orientation of probe molecules in muscle fibers in different intermediate states of the ATP hydrolysis cycle. A separate procedure was used to obtain ST EPR spectra with precise phase settings even in the case of samples with low spectral intensity. Fibers prepared from rabbit psoas muscle were labeled with isothiocyanate spin labels at the reactive thiol sites of the catalytic domain of myosin....

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Exploring enzymatic mechanisms at a molecular level is one of the major challenges in modern biophysics. Based on enzyme structure data, as obtained by X-ray crystallography or NMR spectroscopy, one can suggest how substrates and products bind for catalysis.

14p vinaphone15 25-02-2013 37 1   Download

In the Biomedical Applications of Biophysics, Volume 3 of the Handbook of Modern Biophysics, the authors have added to the topics introduced in Volume 1, Fundamental Concepts in Biophysics. These additional topics help trace the broad field of biophysics. Patrice Koehl starts the book with an introduction to protein structure prediction based on energetics, homology modeling, and ab-initio calculations. Dickey and Faller follow with a “how-to approach” to model biomembranes.

250p echbuon 02-11-2012 58 6   Download