Academic literature on the topic '1H NMR quantification'
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Journal articles on the topic "1H NMR quantification"
de Graaf, Robin A., Hetty Prinsen, Cosimo Giannini, Sonia Caprio, and Raimund I. Herzog. "Quantification of 1H NMR spectra from human plasma." Metabolomics 11, no. 6 (July 5, 2015): 1702–7. http://dx.doi.org/10.1007/s11306-015-0828-1.
Full textMerkx, Donny W. H., Yvonne Westphal, Ewoud J. J. van Velzen, Kavish V. Thakoer, Niels de Roo, and John P. M. van Duynhoven. "Quantification of food polysaccharide mixtures by 1H NMR." Carbohydrate Polymers 179 (January 2018): 379–85. http://dx.doi.org/10.1016/j.carbpol.2017.09.074.
Full textWang, Roy Chih Chung, David A. Campbell, James R. Green, and Miroslava Čuperlović-Culf. "Automatic 1D 1H NMR Metabolite Quantification for Bioreactor Monitoring." Metabolites 11, no. 3 (March 9, 2021): 157. http://dx.doi.org/10.3390/metabo11030157.
Full textShumilina, Elena, Christian Andreasen, Zahra Bitarafan, and Alexander Dikiy. "Determination of Glyphosate in Dried Wheat by 1H-NMR Spectroscopy." Molecules 25, no. 7 (March 28, 2020): 1546. http://dx.doi.org/10.3390/molecules25071546.
Full textKoptyug, Igor V., Quentin Stern, Sami Jannin, and Stuart J. Elliott. "Frozen water NMR lineshape analysis enables absolute polarization quantification." Physical Chemistry Chemical Physics 24, no. 10 (2022): 5956–64. http://dx.doi.org/10.1039/d1cp05127j.
Full textKuz’mina, Natalia E., Sergey V. Moiseev, Elena Y. Severinova, Evgenii A. Stepanov, and Natalia D. Bunyatyan. "Identification and Quantification by NMR Spectroscopy of the 22R and 22S Epimers in Budesonide Pharmaceutical Forms." Molecules 27, no. 7 (March 31, 2022): 2262. http://dx.doi.org/10.3390/molecules27072262.
Full textSorte, Eric G., Jessica M. Rimsza, and Todd M. Alam. "Computational and Experimental 1H-NMR Study of Hydrated Mg-Based Minerals." Molecules 25, no. 4 (February 19, 2020): 933. http://dx.doi.org/10.3390/molecules25040933.
Full textHohmann, Monika, Christine Felbinger, Norbert Christoph, Helmut Wachter, Johannes Wiest, and Ulrike Holzgrabe. "Quantification of taurine in energy drinks using 1H NMR." Journal of Pharmaceutical and Biomedical Analysis 93 (May 2014): 156–60. http://dx.doi.org/10.1016/j.jpba.2013.08.046.
Full textGuimarães, Diana, Jennifer Noro, Ana Loureiro, Artur Cavaco-Paulo, and Eugénia Nogueira. "Quantification of drugs encapsulated in liposomes by 1H NMR." Colloids and Surfaces B: Biointerfaces 179 (July 2019): 414–20. http://dx.doi.org/10.1016/j.colsurfb.2019.03.039.
Full textD’eon, Jessica C., Brian P. Lankadurai, André J. Simpson, Eric J. Reiner, David G. Poirier, Greg C. Vanlerberghe, and Myrna J. Simpson. "Cross-Platform Comparison of Amino Acid Metabolic Profiling in Three Model Organisms Used in Environmental Metabolomics." Metabolites 13, no. 3 (March 8, 2023): 402. http://dx.doi.org/10.3390/metabo13030402.
Full textDissertations / Theses on the topic "1H NMR quantification"
Lehnström, Angelica. "Using 19F-NMR and 1H-NMR for Analysis of Glucocorticosteroids in Creams and Ointments : -Method Development for Screening, Quantification and Discrimination." Thesis, KTH, Skolan för kemivetenskap (CHE), 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-40843.
Full textBellomo, Giovanni. "MR spectroscopy in human prostate: in vitro and in vivo measurements to optimize new quantification algorithms." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2015. http://amslaurea.unibo.it/9259/.
Full textRosset, Isac George. "Produção de biodiesel empregando biocatálise via reações de esterificação e transesterificação." Universidade de São Paulo, 2011. http://www.teses.usp.br/teses/disponiveis/75/75131/tde-19052011-110440/.
Full textIn this work, it was prepared esters of the fatty acid by esterification of the oleic acid and transesterification of the soy oil through enzymatic catalysis. It was determined the composition of the products obtained by 1H NMR and GC-FID. The standards of esters of the oleic acid by acid esterification was prepared employing sulfuric acid, the standards of esters of the soy oil by alkaline transesterification with sodium hydroxide and the standard of the oleic triester was synthesized employing p-toluene sulfonic acid as catalyst. The best enzyme for those reactions was determined through reactions of esterification of the oleic acid and transesterification of the soy oil with ethanol and free co-solvents, and lipase from Candida antarctica was selected. The same enzyme was employed in the enzymatic esterifications of the oleic acid with various alcohols (methanol, ethanol, propanol and butanol), in the enzymatic transesterification of soy oil and the oleic triester with ethanol. In both studies, was assessed the factors that influence the reactions: amount of catalyst, reaction time, water added in the alcohol and the turnover of biocatalyst. In the enzymatic esterification of the oleic acid, the ethanol showed the better yield (96,5%) with 5,0% (m/m) of enzyme at 24 hours of reaction. When 4,0% of water was added to the alcohol, the methanol showed the high efficiency (98,5%) and the yield with another alcohols were not affected. It was also possible to use the enzyme for 10 cycles without lose yield, except for the methanol. In the enzymatic transesterification of the soy oil, the same factors were assessed using 5,0% of enzyme, after 24 hours, a yield of 84,1% was obtained and with the water addition the yield was not modified (83%). On the transesterification, 1H NMR and GC-FID were compared and a great difference was observed for low yields, but on high yields, the difference between methods was small. Monoglycerides and diglycerides were quantified by GC-FID and detected by 1H NMR, it was possible to calculate the ratio between them on the products formed through an equation developed and the difference for this type of analysis was small, only 1.4% . The enzymatic transesterification of the oleic triester was obtained with good yield (90,4%) and a small amount of the monoglycerides and diglycerides was produced. In all the transesterifications reactions, glycerol was not detected after washing mixture of products. The methodology employing Candida antarctica lipase was efficient for biodiesel production by soybean oil and oleic acid with different alcohols.
Palu, Doreen. "Etude de la composition chimique d’extraits d’Ilex aquifolium Linné et de Calicotome villosa (Poiret) Link de Corse par RMN du carbone-13." Electronic Thesis or Diss., Corte, 2022. http://www.theses.fr/2022CORT0018.
Full textThe aim of this work was to determine chemical composition of wild growing corsican understudied plant species, with potential biological activities. This study was realized using the computerized NMR method developed over the past thirty years by the University of Corsica “Chimie et Biomasse” group, UMR CNRS “Sciences Pour l’environnement”. Identified secondary metabolites were then undertaken to evaluate their antimicrobial properties. As part of this study, we selected on the first place commun holly (Ilex aquifolium L.). After two successive column chromatography, hexane and dichloromethane leaves crude extracts and all chromatography fractions were analyzed by 13C NMR (GC(RI) and GC-MS sometimes) to allow the identification of eleven triterpens and α- and β-amyrin esters. Among identified compounds, ursolic acid and oleanolic acid were also quantified by 1H NMR in the dichloromethane crude extract using a reliable method developped and validated (accuracy, linearity precision of measurements). Ursolic acid accounted for 55.3% of the extract, followed by oleanolic acid, 20.8%. Evaluation of previous identified compounds antimicrobial activities has been performed in collaboration with « Biochimie et Biologie Moléculaire du Végétal » group (University of Corsica). Triterpen acids and chloramphenicol (reference antibiotic) displayed similar antibacterial activities against three Gram-positive bacteria, Staphylococcus aureus, Staphylococcus epidermidis and Bacillus cereus (MIC = 4 and 8 mg.L-1 vs. 2 and 4 mg.L-1). Moreover, dichloromethane and dichloromethane/ethyl acetate (50/50, v/v) berries extracts were submitted to successive column chromatography. Crude extracts and chromatography fractions 13C NMR spectra revealed presence of nine triterpens previously identidied, five phenolics derivatives, six monosaccharides and four lactones (menisdaurilide, aquilegiolide, dasycarponilide and 7-epi-griffonilide) were first time identified in berries holly extracts. On the second place, we determined chemical compositions of Calicotome villosa (Poir.) Link flowers and root extracts. 13C NMR analysis of dichloromethane and ethyl acetate flowers extracts and their chromatography fractions, allowed the identification of three flavonoids, five glycosyl flavonoids and four phenylpropanoids. We also studied chemical composition of a methanol root extract which has never been submitted to any chemical composition study. After successive column chromatography, eighteen compounds were identified by 13C NMR including sterols, flavonoids, a polyphenol and pterocarpans
Book chapters on the topic "1H NMR quantification"
Pulkkinen, Juhani, Mika Lappalainen, Anna-Maija Häkkinen, Nina Lundbom, Risto A. Kauppinen, and Yrjö Hiltunen. "Quantification of Human Brain Metabolites from In Vivo 1H NMR Magnitude Spectra Using Self-Organising Maps." In Intelligent Data Engineering and Automated Learning, 522–29. Berlin, Heidelberg: Springer Berlin Heidelberg, 2003. http://dx.doi.org/10.1007/978-3-540-45080-1_71.
Full textSmith, Ashley M., and Jill E. Millstone. "Ligand Exchange and 1H NMR Quantification of Single- and Mixed-Moiety Thiolated Ligand Shells on Gold Nanoparticles." In Methods in Molecular Biology, 17–29. New York, NY: Springer New York, 2017. http://dx.doi.org/10.1007/978-1-4939-6840-4_2.
Full textC. Percival, Benita, Angela Wann, Sophie Taylor, Mark Edgar, Miles Gibson, and Martin Grootveld. "Metabolomics Distinction of Cigarette Smokers from Non-Smokers Using Non-Stationary Benchtop Nuclear Magnetic Resonance (NMR) Analysis of Human Saliva." In Oral Health Care [Working Title]. IntechOpen, 2022. http://dx.doi.org/10.5772/intechopen.101414.
Full textLeenheer, Jerry A. "Characterization of Natural Organic Matter by Nuclear Magnetic Resonance Spectroscopy." In Nuclear Magnetic Resonance Spectroscopy in Environment Chemistry. Oxford University Press, 1997. http://dx.doi.org/10.1093/oso/9780195097511.003.0019.
Full textConference papers on the topic "1H NMR quantification"
Park, Chan. "Quantification of Free Alcohol Content in Industrial Alcohol Ethoxylates by 1h NMR." In Virtual 2021 AOCS Annual Meeting & Expo. American Oil Chemists’ Society (AOCS), 2021. http://dx.doi.org/10.21748/am21.466.
Full textRosset, Isac G., and André L. M. Porto. "Transesterification and Quantification by 1H NMR of Triester Oleate by Candida antarctica Lipase." In 14th Brazilian Meeting on Organic Synthesis. São Paulo: Editora Edgard Blücher, 2013. http://dx.doi.org/10.5151/chempro-14bmos-r0004-1.
Full textHennebelle, Marie, Dharma Kodali, Jianli Wang, and John Van Duynhoven. "Quantitative assessment of epoxide formation in bulk oil and mayonnaise by 1H-13C HSQC NMR spectroscopy." In 2022 AOCS Annual Meeting & Expo. American Oil Chemists' Society (AOCS), 2022. http://dx.doi.org/10.21748/ndzl9672.
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