Academic literature on the topic '13C nuclear magnetic resonance. eng'

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Journal articles on the topic "13C nuclear magnetic resonance. eng"

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Gao, Song, Ed S. Mooberry, and James L. Steele. "Use of 13C Nuclear Magnetic Resonance and Gas Chromatography To Examine Methionine Catabolism by Lactococci." Applied and Environmental Microbiology 64, no. 12 (1998): 4670–75. http://dx.doi.org/10.1128/aem.64.12.4670-4675.1998.

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ABSTRACT Formation of methanethiol from methionine is widely believed to play a significant role in development of cheddar cheese flavor. However, the catabolism of methionine by cheese-related microorganisms has not been well characterized. Two independent methionine catabolic pathways are believed to be present in lactococci, one initiated by a lyase and the other initiated by an aminotransferase. To differentiate between these two pathways and to determine the possible distribution between the pathways, 13C nuclear magnetic resonance (NMR) performed with uniformly enriched [13C]methionine w
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Fitzpatrick, Susan M., Hoby P. Hetherington, Kevin L. Behar, and Robert G. Shulman. "The Flux from Glucose to Glutamate in the Rat Brain in vivo as Determined by 1-Observed, 13C-Edited NMR Spectroscopy." Journal of Cerebral Blood Flow & Metabolism 10, no. 2 (1990): 170–79. http://dx.doi.org/10.1038/jcbfm.1990.32.

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The rate of incorporation of carbon from [1-13C]glucose into the [4-CH2] and [3-CH2] of cerebral glutamate was measured in the rat brain in vivo by 1H-observed, 13C-edited (POCE) nuclear magnetic resonance (NMR) spectroscopy. Spectra were acquired every 98 s during a 60-min infusion of [1-13C]glucose. Complete time courses were obtained from six animals. The measured intensity of the unresolved [4-13CH2] resonances of glutamate and glutamine increased exponentially during the infusion and attained a steady state in ∼20 min with a first-order rate constant of 0.130 ± 0.010 min−1 (t1/2 = 5.3 ± 0
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Braach-Maksvytis, V. L., and B. A. Cornell. "Chemical shift anisotropies obtained from aligned egg yolk phosphatidylcholine by solid-state 13C nuclear magnetic resonance." Biophysical Journal 53, no. 5 (1988): 839–43. http://dx.doi.org/10.1016/s0006-3495(88)83163-1.

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MacKenzie, N. E., E. A. Van De Waa, P. R. Gooley, et al. "Comparison of glycolysis and glutaminolysis in Onchocerca volvulus and Brugia pahangi by 13C nuclear magnetic resonance spectroscopy." Parasitology 99, no. 3 (1989): 427–35. http://dx.doi.org/10.1017/s0031182000059151.

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SummaryComparison of glycolysis in Brugia pahangi and Onchocerca volvulus by C nuclear magnetic resonance (NMR) spectroscopy showed that the former organism is predominantly a lactate fermenter and the latter resembles more closely the metabolism of a mixed acid fermenter producing lactate, succinate, acetate, ethanol, formate and carbon dioxide. Both organisms synthesize glycogen as a storage carbohydrate. Glutaminolysis in both organisms proceeds by the δ-aminobutyrate shunt to produce succinate which is then further metabolized to acetate and carbon dioxide as end-products.
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Reese, Paul B., Laird A. Trimble, and John C. Vederas. "Detection of deuterium labelling by two-dimensional 1H,13C nuclear magnetic resonance shift correlation with 2H decoupling." Canadian Journal of Chemistry 64, no. 7 (1986): 1377–84. http://dx.doi.org/10.1139/v86-236.

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Methylene groups that are stereospecifically labelled with deuterium can be easily observed using deuterium-decoupled 2-dimensional proton/carbon nmr shift correlation spectroscopy in either normal or CH-selective mode. Application of the technique to [3-2H]camphors 2, 3, and 4 shows that overlap of other 13C resonances does not interfere with the 2H detection. Such experiments with [3-2H]-N-benzoylphenylalanine methyl esters 6 and 7 demonstrate that identification of labelled diastereotopic hydrogens can be done if they are separated by 0.1 ppm in the 1H nmr spectrum. Fully deuterated carbons
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Ronda, Joan Carles, Angels Serra, Ana Mantecón, and Virginia Cádiz. "End-group analysis of poly(phenyl glycidyl ether), 1. Hydroxylic groups using 1H and 13C nuclear magnetic resonance." Macromolecular Chemistry and Physics 195, no. 10 (1994): 3445–57. http://dx.doi.org/10.1002/macp.1994.021951013.

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Beynon, Linda M., James C. Richards, Malcolm B. Perry, and Peter J. Kniskern. "Antigenic and structural relationships within group 19 Streptococcuspneumoniae: chemical characterization of the specific capsular polysaccharides of types 19B and 19C." Canadian Journal of Chemistry 70, no. 1 (1992): 218–32. http://dx.doi.org/10.1139/v92-033.

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The specific capsular polysaccharides of Streptococcuspneumoniae types 19B and 19C (American types 58 and 59) were investigated by a combination of 1H, 13C, and 31P nuclear magnetic resonance spectroscopy and analytical methods based on mass spectrometry. The two polysaccharides were found to be high molecular weight polymers composed of L-rhamnose, 2-amino-2-deoxy-D-mannose, D-ribose, D-glucose, and phosphate. Homo- and heteronuclear chemical shift correlation techniques and nuclear Overhauser enhancement experiments led to the unambiguous assignment of the 1H and 13C resonances from the glyc
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Nizovtsev, Alexander P., Aliaksandr L. Pushkarchuk, Sergei Ya Kilin, et al. "Hyperfine Interactions in the NV-13C Quantum Registers in Diamond Grown from the Azaadamantane Seed." Nanomaterials 11, no. 5 (2021): 1303. http://dx.doi.org/10.3390/nano11051303.

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Nanostructured diamonds hosting optically active paramagnetic color centers (NV, SiV, GeV, etc.) and hyperfine-coupled with them quantum memory 13C nuclear spins situated in diamond lattice are currently of great interest to implement emerging quantum technologies (quantum information processing, quantum sensing and metrology). Current methods of creation such as electronic-nuclear spin systems are inherently probabilistic with respect to mutual location of color center electronic spin and 13C nuclear spins. A new bottom-up approach to fabricate such systems is to synthesize first chemically a
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Xavier, Karina B., Milton S. da Costa, and Helena Santos. "Demonstration of a Novel Glycolytic Pathway in the Hyperthermophilic Archaeon Thermococcus zilligii by13C-Labeling Experiments and Nuclear Magnetic Resonance Analysis." Journal of Bacteriology 182, no. 16 (2000): 4632–36. http://dx.doi.org/10.1128/jb.182.16.4632-4636.2000.

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ABSTRACT The operation of a novel glycolytic pathway was demonstrated in nongrowing cells of Thermococcus zilligii by analysis of the isotopic enrichment in the end products derived from fermentation of 13C-labeled glucose. The new pathway involved the formation of formate, derived from C-1 in glucose, via cleavage of a six-carbon carboxylic acid.
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González-Rodríguez, Irene, Paula Gaspar, Borja Sánchez, Miguel Gueimonde, Abelardo Margolles, and Ana Rute Neves. "Catabolism of Glucose and Lactose in Bifidobacterium animalis subsp. lactis, Studied by13C Nuclear Magnetic Resonance." Applied and Environmental Microbiology 79, no. 24 (2013): 7628–38. http://dx.doi.org/10.1128/aem.02529-13.

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ABSTRACTBifidobacteria are widely used as probiotics in several commercial products; however, to date there is little knowledge about their carbohydrate metabolic pathways. In this work, we studied the metabolism of glucose and lactose in the widely used probiotic strainBifidobacterium animalissubsp.lactisBB-12 byin vivo13C nuclear magnetic resonance (NMR) spectroscopy. The metabolism of [1-13C]glucose was characterized in cells grown in glucose as the sole carbon source. Moreover, the metabolism of lactose specifically labeled with13C on carbon 1 of the glucose or the galactose moiety was det
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Dissertations / Theses on the topic "13C nuclear magnetic resonance. eng"

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Vasconcelos, Ana Flora Dalberto. "β-glucanas de isolados fúngicos do gênero Botryosphaeria : produção, caracterização química e atividade anticoagulante /". Rio Claro : [s.n.], 2009. http://hdl.handle.net/11449/103977.

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Resumo: Exopolissacarídeos do tipo β-glucanas são polímeros produzidos por uma grande variedade de microrganismos e podem possuir diferentes propriedades físicas, químicas e aspectos estruturais. Esses biopolímeros apresentam atividades biológicas interessantes (antitumor, antiviral, anticoagulante) e aplicações comerciais como produtos em alimentos, cosméticos e farmacêuticos. Entretanto, para a aplicação dessas moléculas, é necessário primeiramente o conhecimento de suas estruturas químicas. Assim, o objetivo deste trabalho foi a produção, caracterização química de quatro exopolissacarideos
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Chaudhry, Amirah. "13C nuclear magnetic resonance relaxation studies of uniformly 13C and 15N labelled proteins." Thesis, University of Leicester, 1997. http://hdl.handle.net/2381/30024.

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This thesis examines the problems of making 13C NMR relaxation measurements in proteins uniformly enriched with 13C and 15N isotopes and it presents a solution in the form of a new method of analysing 13C relaxation data. In uniformly doubly-labelled proteins a particular 13C spin can undergo relaxation due to its own CSA and its dipolar interactions with bonded 13C atoms and bonded and non-bonded protons. The non-bonded protons can be on the same amino acid residue or on other residues which are close in space. To quantify the dipolar interactions the internuclear vector needs to be known to
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Tzou, Der-Lii M. "Solid state 13C NMR studies of the Morphology and orientational order of polymer fibers." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/30276.

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鄭家樑 and Ka-leung Cheng. "A study of the 13C-NMR properties of some fatty acid derivatives and their triacylglycerols." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 1996. http://hub.hku.hk/bib/B31212931.

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Cheng, Ka-leung. "A study of the 13C-NMR properties of some fatty acid derivatives and their triacylglycerols /." Hong Kong : University of Hong Kong, 1996. http://sunzi.lib.hku.hk/hkuto/record.jsp?B17537307.

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Choi, Yoon S. "Studies in Fluorine Chemistry: 13C NMR Investigation of SF5/SO2F Fluorinated Systems." PDXScholar, 1994. https://pdxscholar.library.pdx.edu/open_access_etds/4717.

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The purpose of this thesis was two fold: (i) The synthesis and characterization of SF5 containing dienes. (ii) The characterization of hydro/fluorocarbon compounds containing SF5/S02F groups via their 13C NMR spectra. A new SF5CH2CHBrCH2CF=CF2 was prepared and characterized as a precursor to new dielectric polymers. This new adduct was made from the reaction of pentafluorothio bromide with l,l,2-trifluoro-1,4-pentadiene. A SF5-diene was prepared from the reaction of pentafluorothio chloride with acetylene. This reaction involves a radical addition mechanism. The SF5 group is bonded to the carb
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Driega, Alex B. (Alexander Brooke) Carleton University Dissertation Chemistry. "An analysis of factors contributing to isotropic [superscript] 13C shifts in 1,2- Dialkoxybenzene and Cyclohexane derivatives." Ottawa, 1992.

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Crusca, Junior Edson. "Síntese, estudos estruturais e biológicos do peptídeo hilina a1 e análogos /." Araraquara : [s.n.], 2010. http://hdl.handle.net/11449/100732.

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Resumo: A existência de cepas resistentes aos antibióticos tradicionais aumenta a necessidade do desenvolvimento e estudo de novas drogas. Um grupo destas moléculas é o dos peptídeos antimicrobianos (PAMs). A ação dos PAMs é atribuída à formação de poros na membrana, aumentando sua permeabilidade e levando a morte celular. Somado aos estudos visando à elucidação dos mecanismos de ação dos PAMs, outros vêem sendo conduzidos para avaliar a importância de cada região da sequência em sua atividade biológica. Esta tese apresentou os estudos estruturais e biológicos de um peptídeo bioativo, provenie
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Scholz, David Johannes [Verfasser], Axel [Akademischer Betreuer] Haase, and Franz [Akademischer Betreuer] Pfeiffer. "Quantified pH imaging via nuclear magnetic resonance and hyperpolarized 13C-bicarbonate dissolution dynamic nuclear polarization / David Johannes Scholz. Gutachter: Axel Haase ; Franz Pfeiffer. Betreuer: Axel Haase." München : Universitätsbibliothek der TU München, 2015. http://d-nb.info/107222478X/34.

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Venturelli, Farley Augusto da Silva. "Análise da posição mandibular através de diferentes métodos de localização /." Araçatuba : [s.n.], 2005. http://hdl.handle.net/11449/97382.

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Orientador: Alício Rosalino Garcia<br>Banca: Paulo Renato Junqueira Zuim<br>Banca: Osvaldo Luiz Bezzon<br>Resumo: Muito se discute sobre a posição ideal que o côndilo deve ocupar dentro da fossa mandibular. Apesar da Relação Central ser usada como uma posição de referência no campo da Odontologia, alguns autores não concordam que esta posição seja considerada fisiológica. Sendo assim, este estudo procurou avaliar a posição do côndilo dentro da fossa mandibular em um grupo de indivíduos assintomáticos, quando os dentes estão em máxima intercuspidação (MI), com placa miorrelaxante e com o Guia d
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Books on the topic "13C nuclear magnetic resonance. eng"

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Tsang, T. 13C nuclear magnetic resonance in graphite intercalation compounds. Dept. of Physics, Howard University, 1985.

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Rahman, Atta-ur. 13C-NMR of natural products. Plenum, 1992.

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Rahman, Atta-ur. 13C-NMR of natural products. Plenum, 1992.

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O'Connell, Timothy P. A 13C-NMR study of tetrahedral adducts with chymotrypsin and subtilisin BPN. University College Dublin, 1997.

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Atta-Ur-Rahman and V. U. Ahmad. 13C-NMR of Natural Products: Volume 1 Monoterpenes and Sesquiterpenes. Springer, 2012.

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J, Pouchert Charles, Behnke Jacqlynn, and Aldrich Chemical Company, eds. The Aldrich library of 13C and 1H FT NMR spectra. Aldrich Chemical Co., 1993.

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Kunz, Roland W., and Paul S. Pregosin. 31P and 13C N.M.R. of Transition Metal Phosphine Complexes. Springer, 2012.

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Seco, Josi M., Emilio Quiqoa, and Ricardo Riguera. The Assignment of the Absolute Configuration by NMR using Chiral Derivatizing Agents. Oxford University Press, 2015. http://dx.doi.org/10.1093/oso/9780199996803.001.0001.

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Nuclear magnetic resonance spectroscopy (NMR spectroscopy) is a research technique that uses the magnetic properties of atomic nuclei to determine physical and chemical properties of atoms or the molecules in which they are contained. Proton NMR (1H NMR) is a technique that applies NMR spectroscopy specifically to the hydrogen-1 nuclei within the molecules of a substance, in order to determine the structure of that substance's molecules. The use of 1H NMR for the assignment of absolute configuration of organic compounds is a well-established technique. Recent research describes the technique's
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Book chapters on the topic "13C nuclear magnetic resonance. eng"

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Simpson, T. J. "13C-NMR in Metabolic Studies." In Nuclear Magnetic Resonance. Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82609-2_1.

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Visintainer, J., and R. C. Hirst. "13C-NMR Determination of Rubber Content in Guayule Bushes." In Nuclear Magnetic Resonance. Springer Berlin Heidelberg, 1986. http://dx.doi.org/10.1007/978-3-642-82609-2_7.

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Atta-ur-Rahman. "Chemical Shifts and Spin—Spin Couplings in 13C-NMR Spectroscopy." In Nuclear Magnetic Resonance. Springer US, 1986. http://dx.doi.org/10.1007/978-1-4612-4894-1_4.

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Sherry, A. Dean, and Craig R. Malloy. "New Insights into Metabolic Regulation from Hyperpolarized 13C MRS/MRI Studies." In Dynamic Hyperpolarized Nuclear Magnetic Resonance. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-55043-1_8.

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Park, Jae Mo, and Thomas Jue. "Insights on Lactate Metabolism in Skeletal Muscle Based on 13C Dynamic Nuclear Polarization Studies." In Dynamic Hyperpolarized Nuclear Magnetic Resonance. Springer International Publishing, 2021. http://dx.doi.org/10.1007/978-3-030-55043-1_10.

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Buntkowsky, G., W. Hoffmann, and H. M. Vieth. "2H and 13C NMR Investigations of Fluorene Single Crystals with Optical Nuclear Polarization." In 25th Congress Ampere on Magnetic Resonance and Related Phenomena. Springer Berlin Heidelberg, 1990. http://dx.doi.org/10.1007/978-3-642-76072-3_114.

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Mao, Jingdong, Xiaoyan Cao, and Na Chen. "Characterization of Biochars Using Advanced Solid-State 13C Nuclear Magnetic Resonance Spectroscopy." In Advanced Biofuels and Bioproducts. Springer New York, 2012. http://dx.doi.org/10.1007/978-1-4614-3348-4_5.

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Ragavan, Mukundan, and Matthew E. Merritt. "Nuclear Magnetic Resonance Measurement of Metabolic Flux Using 13C and 1H Signals." In Methods in Molecular Biology. Springer New York, 2019. http://dx.doi.org/10.1007/978-1-4939-9488-5_3.

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Mason, Graeme F., Kevin L. Behar, Margaret A. Martin, and Robert G. Shulman. "Rat Brain Glucose Concentration and Transport Kinetics Determined with 13C Nuclear Magnetic Resonance Spectroscopy." In Frontiers in Cerebral Vascular Biology. Springer US, 1993. http://dx.doi.org/10.1007/978-1-4615-2920-0_6.

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Suzuki, Miyoko, Yoshio Sasaki, József Szejtli, and Éva Fenyvesi. "13C Nuclear Magnetic Resonance Spectra of Cyclodextrin Monomers, Derivatives and their Complexes with Methyl Orange." In Inclusion Phenomena in Inorganic, Organic, and Organometallic Hosts. Springer Netherlands, 1987. http://dx.doi.org/10.1007/978-94-009-3987-5_60.

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Conference papers on the topic "13C nuclear magnetic resonance. eng"

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Duncan, T. Michael. "The distribution of carbon in boron carbides: 13C nuclear magnetic resonance studies." In AIP Conference Proceedings Volume 140. AIP, 1986. http://dx.doi.org/10.1063/1.35592.

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Zhang, Xiangyun, Jun Li, Yangzhi Mo, and Gan Zhang. "Tow Solid-state 13C Nuclear Magnetic Resonance Methods for Detecting Chemical Structure of Coal Combustion Emissions." In 2016 5th International Conference on Sustainable Energy and Environment Engineering (ICSEEE 2016). Atlantis Press, 2016. http://dx.doi.org/10.2991/icseee-16.2016.106.

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Edwards, John C., and Peter J. Choate. "Average Molecular Structure of Gasoline Engine Combustion Chamber Deposits Obtained by Solid-State 13C, 31P, and 1H Nuclear Magnetic Resonance Spectroscopy." In International Fuels & Lubricants Meeting & Exposition. SAE International, 1993. http://dx.doi.org/10.4271/932811.

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Alves, Geomar Souza, Fábio Luiz Paranhos Costa, Antônio Maia de Jesus Chaves Neto, and Gunar Vingre da Silva Mota. "Análise de RMS de 13C usando GIAO, CSGT e IGAIM: Fatores de escalonamentos de Terpenos." In VIII Simpósio de Estrutura Eletrônica e Dinâmica Molecular. Universidade de Brasília, 2020. http://dx.doi.org/10.21826/viiiseedmol2020153.

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Terpenes are natural products that have several biological and pharmacological properties that are directly related to their chemical structures. In the structural determination of organic molecules, Nuclear Magnetic Resonance (NMR) is used on a large scale. The chemical shift (δ) being the most important parameter. The present study aims to develop and test (the elemol molecule will be used for this purpose) δ scaling factors from 13C to terpenes, based on linear regressions. 10 complex sesquiterpene molecules were selected with the unmistakably determined structures (confirmed with X-ray cry
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Reports on the topic "13C nuclear magnetic resonance. eng"

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Characterization of the International Humic Substances Society standard and reference fulvic and humic acids by solution state carbon-13 (13C) and hydrogen-1 (1H) nuclear magnetic resonance spectrometry. US Geological Survey, 1989. http://dx.doi.org/10.3133/wri894196.

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