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Showing 1 to 20 of 944 for “"1H"”.
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Hochfeld 1H-NMR-Mikroskopie zur biophysikalischen Grundlagenforschung
… von wenigen Mikrometern, ergeben sich für die 1H NMR-Mikroskopie zahlreiche neue Anwendungsgebiete. Allerdings sind die Möglichkeiten und Grenzen der NMR-Mikroskopie bezüglich ihrer praktischen Anwendbarkeit bisher nur wenig untersucht worden. Die vorliegende Arbeit ist im Bereich der …
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Die Wertigkeit der 1H- und 31P- Spektroskopie bei Rotatorenmanschettenrupturen
In vielen Veröffentlichungen ist die Atrophie und die fettige Infiltration der Rotatorenmanschette als wichtiger Prädiktor für den Outcome nach Rekonstruktionen der Rotatorenmanschette belegt worden, insofern, als dass eine fettige Infiltration eine erhöhte Re-Rupturrate bedingt. Der intramuskuläre …
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Metabolomic investigation of food matrices by 1H NMR spectroscopy
The present 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 …
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Quantitative 1H N.M.R. chemical shift imaging of neuronal content
Thesis (Ph. D.)--Massachusetts Institute of Technology, Dept. of Nuclear Engineering, 1994.
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Halo-fosfatų 31P, 1H ir 35Cl kietojo kūno BMR tyrimas /
… (Ca2(PO4)Cl) [5], with varying morphology. 31P, 1H, 35Cl MAS [14], and 35Cl wideline NMR [15] spectra were used to determine materials present in samples. Also, correlations between spectra and morphology of studied materials were found. Using 31P MAS NMR spectra, it was found that surface …
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Untersuchungen zur Bildung von Furosin und N-terminalen 2(1H)-Pyrazinonen
… jeweils als die am N-Terminus durch einen 2(1H)-Pyrazinon-Ring modifizierten Peptide, aufgeklärt werden. Das Hauptprodukt der Reaktion von Methylglyoxal mit dem Peptid Gly-Ala-Phe wurde ebenfalls als 2(1H)-Pyrazinon-Peptid aufgeklärt. Nach Inkubation von Insulin mit Glyoxal unter …
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JULIA-KOCIENSKI APPROACH TO 4-SUBSTITUTED 1- ALKENYL-1H-1,2,3-TRIAZOLES
… 1,3-dipolar<br />cycloaddition of 1-phenyl-1H-tetrazol-5-yl (PT) azidomethyl sulfide with: pmethoxyphenyl, 2-pyridyl, and triisopropylsilyl alkynes. Subsequent oxidation of the sulfides furnished 4-substituted triazoles with a Julia-Kocienski olefination handle attached at the N1 atom of the …
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Investigating the Influence of Methamphetamine on brain metabolism using 1H-MRS
Methamphetamine (MA) has been shown to have a detrimental relationship with on neuronal integrity and viability, and has been associated with decreased executive function. The association of acute and short-term MA abstinence on brain metabolism, in adult MA abusers, is understudied. Negative …
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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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Síntese e avaliação de fitotoxicidade de (E)-3-estirilquinolin-4(1H)-onas substituídas
As 4(1H)-quinolonas pertencem a uma classe de compostos de grande utilização e importância na medicina e na área farmacêutica. São substâncias que apresentaram potencial como inibidores da cadeia de transporte de elétrons no fotossistema II durante a fotossíntese. As quinolonas estão distribuídas …
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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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Monitoring apoptosis in intact cells by high-resolution magic angle spinning 1H NMR spectroscopy
… of High-Resolution Magic Angle Spinning (HRMAS) 1H NMR spectroscopy in monitoring metabolic changes in intact cells during apoptosis. The technique is used to analyse metabolic profiles of cells treated with cisplatin and etoposide after 3, 8, 24 and 48 h. The results are compared to the analysis …
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Investigating neuroinflammation in schizophrenia: a proton magnetic resonance spectroscopy (1H-MRS) and cytokine study
Introduction: There are similarities in the phenomenology and psychobiology of schizophrenia and methamphetamine psychosis, with evidence of alterations in glutamatergic function in both conditions, and of involvement of inflammatory pathways in schizophrenia and methamphetamine abuse. Few studies …
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Flow 1H Dynamic Nuclear Polarization Studies in Normal Liquids and Supercritical Fluid Carbon Dioxide
Flow 1H dynamic nuclear polarization (DNP) experiments of small probe molecules (i.e. chloroform and benzene) were conducted in normal liquids (i.e. neat benzene, deuterated benzene, chloroform) and supercritical fluid CO₂. Initial data collected on the 14N NMR line width of acetonitrile in normal …
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C(sp2)–H Functionalizations Employing 2-Aminophenyl-1H-pyrazole as a New Removable Directing Group
<p>2-Aminophenyl-1H-pyrazole (2-APP) was discovered as a novel removable bidentate directing group for copper-mediated aerobic oxidative C(sp2)–H bond amidation and sulfonamidation bearing a wide range of sulfonamides, When Cu(OAc)2 was employed as the copper source, 1,1,3,3-tetramethylguanidine …
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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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