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Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 402 for “"1H-NMR"”.
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Hochfeld 1H-NMR-Mikroskopie zur biophysikalischen Grundlagenforschung
Dank der mit modernen NMR-Spektrometern (Kernspintomographen) routinemäßig realisierbaren isotropen räumlichen Auflösungen von wenigen Mikrometern, ergeben sich für die 1H NMR-Mikroskopie zahlreiche neue Anwendungsgebiete. Allerdings sind die Möglichkeiten und Grenzen der NMR-Mikroskopie bezüglich …
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Metabolomic investigation of food matrices by 1H NMR spectroscopy
… Ph.D. work shows some applications on the NMR-based metabolomic approach in food science. The investigated food matrices are largely different, from a manufactured product that undergoes only physical treatments (bottarga), to a manufactured product where biochemical transformations take …
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Determinazione delle proprietà del petrolio tramite spettroscopia 1H-NMR e analisi chemiometrica
… PhD research, as a fast and viable alternative, 1H NMR spectroscopy, combined with chemometrics, has been used. To exploit the full information content of the NMR data acquired on complex systems, as crude oils, chemometric regression techniques as partial least squares (PLS) have been developed. …
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Monitoring apoptosis in intact cells by high-resolution magic angle spinning 1H NMR spectroscopy
… of apoptosis is a notable increase in proton NMR resonances associated with lipids stored in lipid droplets (LDs). MRI-based studies of lipid accumulation have been used to monitor apoptosis-based cancer treatments. However, the cellular processes which lead to the accumulation of lipid …
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Konformation und Wechselwirkung von Elastomeren, adsorbiert an Ruß und Silica - untersucht durch transversale 1H NMR Relaxation
Mit Hilfe der transversalen 1H NMR Spektroskopie wurde die Konformation von adsorbierten Polymeren und die Stärke der Füllstoff-Polymer Wechselwirkungen bestimmt, und Rückschlüsse auf die verstärkenden Eigenschaften des Füllstoffs gezogen. Als Füllstoffe dienten vier Ruße mit bekannten, stark …
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Observation by flow 1H NMR and dimerization kinetics and products of reactive ortho-quinodimethanes and benzocyclobutadiene
… (1) were observed by flow [superscript]1H NMR spectroscopy at room temperature. The [superscript]1H NMR spectrum of 9, generated in acetonitrile-d[subscript]3 (CD[subscript]3CN) by fluoride ion induced 1,4-elimination from (1-(trimethylsilylmethyl)) trimethyl(2-naphthylmethyl)ammonium …
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Molecular Liquids and Polymers Investigated by Field Cycling 1H NMR Relaxometry: Impact of Rotational and Translational Dynamics on Relaxation
… nuclear magnetic resonance relaxometry (FC NMR) is applied to measure the spin-lattice relaxation time, T1, of proton spins in condensed matter not only at different temperatures but also at different Larmor frequencies, ω. The results are presented by means of six publications, from which …
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Inhomogeneous 1H NMR spin-lattice relaxation in the organic superconductor κ-(BEDT-TTF)2-Cu[N(CN)2]Br
… phase coherence. Previously reported proton NMR measurements on this material have shown a high sensitivity to vortex motion, but reported no interesting behavior above the phase transition [15,25,42]. In this thesis, we revisit the 1H NMR properties of κ-(ET)2Cu[N(CN)2]Br, paying specific …
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Bildkontraste im menschlichen Muskelgewebe und Beugungsphänomene in der 1H-NMR infolge individueller und kollektiver Dipol-Dipol-Wechselwirkungen von Wasserprotonen in flüssiger Phase
Individuelle und kollektive 1H-Dipol-Dipol-Wechselwirkungen in der NMR von Flüssigkeiten eröffnen neue Ansätze zur Untersuchung von mikroskopischen Strukturen. In der CRAZED-Pulssequenz (zwei HF-Pulse, Zeitintervall τ, Gradient G) führen kollektive Dipol-Dipol-Wechselwirkungen zwischen Protonen mit …
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Potential platinum DNA-Metallointercalators : synthesis, characterisation and 1H NMR studies on [Pt(diimine)(N,N-di(n-butyl)-N'-acylthioureato)]+PF6 complexes in solution
A series of mixed-ligand [Pt(diimine)(N,N-di(n-butyl)-N'-acylthioureato)fPF6- complexes has been synthesised and fully characterised (where diimine is: 1,10 phenanthroline; 4,7-diphenyl-1,10- phenanthroline; 2,2'-bipyridyl; 4,4'-dimethyl-2,2'-bipyridyl and 4,4'-di-tert-butyl-2,2'-bipyridyl and acyl …
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COMPARATIVE EVALUATION OF 1H NMR SPECTROSCOPY AS A NOVEL TOOL FOR ASSESSING STRESS WITH TRADITIONAL METHODS OF BLOOD CORTICOSTERONE LEVELS AND HETEROPHIL LYMPHOCYTE RATIO IN BROILER CHICKENS (GALLUS DOMESTICUS)
… and animal welfare in the poultry industry. 1H Nuclear Magnetic Resonance spectroscopy (NMR) may provide insightful mechanistic information on effects of stressors by simultaneously measuring a large number of low molecular weight endogenous metabolites that may potentially be used as …
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XYLARIC ACID, D-ARABINARIC ACID (D-LYXARIC ACID), L-ARABINARIC ACID (L-LYXARIC ACID), AND RIBARIC ACID-1,4-LACTONE; SYNTHESIS AND ISOLATION - SYNTHESIS OF POLYHYDROXYPOLYAMIDES THEREFROM
… units in solution were investigated using 1H NMR, and molecular mechanics modeling. Limitations inherent to 1H NMR and MM3(96) computational modeling required the use of glutaramides and pentaramides as small molecule mimics of the PHPA's aldaryl monomer unit. A converging Monte Carlo …
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XYLARIC ACID, D-ARABINARIC ACID (D-LYXARIC ACID), L-ARABINARIC ACID (L-LYXARIC ACID), AND RIBARIC ACID-1,4-LACTONE; SYNTHESIS AND ISOLATION - SYNTHESIS OF POLYHYDROXYPOLYAMIDES THEREFROM
… units in solution were investigated using 1H NMR, and molecular mechanics modeling. Limitations inherent to 1H NMR and MM3(96) computational modeling required the use of glutaramides and pentaramides as small molecule mimics of the PHPA's aldaryl monomer unit. A converging Monte Carlo …
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Synthesis and characterization of terpyridine-based fluorescent coordination polymers
… of first row transition metal ions by UV-vis, 1H NMR and isothermal titration calorimetry and ƒ´H values for the tpy complexation processes have been determined. These studies reveal that Zn2+ is the best suited metal ion for the reversible coordination of the terpyridine ligand. Thus, …
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1H Nuclear Magnetic Resonance-Linked Metabolomics Investigations of Broiler Poultry and Human Saliva
1H NMR-linked metabolomics was employed to investigate blood plasma and breast meat muscle from broiler poultry for quality assessment. The purpose of this research is to further explore the metabolomics profile of poultry breast meat muscle and plasma and comprehensively identify their metabolic …
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The optical resolution of albuterol
… chromatography on a chiral stationary phase, and 1H NMR experiments using a chiral shift reagent were used to assess the optical purity of the resolved material. Acid hydrolysis of the resolved acetonide gave rise to the target, (R)-albuterol, which was isolated as an acetate salt. The inferred …
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ESIMS targeted synthesis of novel {Pt2S2} derivatives
… isolated and structurally characterised with 31P{1H} and 195Pt nu- clear magnetic resonance (NMR) spectroscopy, and for 5, 3 and 7 single crystal X- ray diffraction (XRD) studies. 6 was found to be a mixture of isomers, and crystals suitable for a single crystal XRD experiment were not obtained. …
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Synthesis and structural analysis of [alpha]-aminophosphonic acids and their phosphonate ester derivatives
… were obtained by the full analysis of the 1H NMR spectra. The strategy adopted for the preparation of the phosphonic acids started from the synthesis of imine precursors. The imines were prepared by condensing aminodiphenylmethane or [alpha]-methylbenzylamine with a wide variety of …
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