Relevant bibliographies by topics / Lc-Hrms2 | 13c nmr

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  1. Journal articles
  2. Dissertations / Theses
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Academic literature on the topic 'Lc-Hrms2 | 13c nmr'

Author: Grafiati
Published: 7 July 2024
Last updated: 31 July 2025

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Journal articles on the topic "Lc-Hrms2 | 13c nmr"

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Jankowski, C. K., M. R. Van Calsteren, N. Aychet, J. F. Dozol, C. Moulin, and C. Lamouroux. "Study of the nitration of di-n-octylcrown-6 calix[4]arene using LC–MS, NMR, and molecular modelling." Canadian Journal of Chemistry 83, no. 8 (2005): 1098–113. http://dx.doi.org/10.1139/v05-126.

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The selective HNO3 nitration of di-n-octylcrown-6 calix[4]arene using different conditions, studied with LC–MS and NMR (1H and 13C) spectroscopic techniques, lead to the identification of most of the expected nitro derivative isomeric compounds. The formation of these isomers under acidic and radiolytic conditions is discussed with the help of molecular modelling.Key words: calix crown compounds, nitration of calixarenes, NMR of isomeric nitrocalixarenes, LC-ESI-MS.
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Shupeniuk, Vasyl, Tetyana Taras, Oksana Sabadakh, Eugene Luchkevich, and Yurii Kornii. "Synthesis some 4-substituted 9,10-anthraquinones." French-Ukrainian Journal of Chemistry 8, no. 1 (2020): 58–65. http://dx.doi.org/10.17721/fujcv8i1p58-65.

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New 4-substituted 9,10-anthraquinones (6 compouds) with amino derivations fragments were synthesized through the substitution of the bromaminic acid by amines using the Ullmann coupling reaction. The structures of the synthesized compounds were determined using LC-MS, 1H NMR, 13C NMR spectroscopy, and elemental analysis data.
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Kerschl, Susanna, and Bernd Wrackmeyer. "Notizen: Versuche zur Herstellung eines Alkenyl(dimethyl)zinnhydrids: Gibt es eine intramolekulare Sn–H–B-Brücke?/ Attempts at the Synthesis of an Alkenyl(dimethyl)tin Hydride: Is there an Intramolecular Sn–H–B Bridge?" Zeitschrift für Naturforschung B 42, no. 8 (1987): 1047–49. http://dx.doi.org/10.1515/znb-1987-0820.

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Abstract2-(E)-Dim ethyl(chloro)stannyl-3-diethylboryl-2- pentene (lc) reacts with trimethyltin hydride (3) to give the corresponding alkenyl(dim ethyl)tin hydride (2). Compound 2 has been characterized by 1H, 11B, 13C, 119Sn NMR . Neither the NMR nor the IR data are in support of an intramolecular Sn-H-B bridge.
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Xie, Yimin, Xudong Chen, Kai Zhang, Sheng Cui, and Gongxia Zhang. "Elucidation of lignin and polysaccharide linkages in wheat straw by 2H/13C isotopic tracer." BioResources 18, no. 1 (2022): 550–69. http://dx.doi.org/10.15376/biores.18.1.550-569.

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To elucidate chemical linkages between lignin and polysaccharides, the aqueous mixed solutions of coniferin-[α-13C], syringin-[α-13C], D-glucose-[6-2H], and phenylalanine ammonia-lyase inhibitor were injected into a living wheat stalk. Internode tissues with high abundance of 2H-13C were collected. The milled wood lignin, lignin-carbohydrate complex (LCC), and residual LCC (R-LCC) with enrichment of 2H-13C were isolated. The 13C and 2H abundances showed that the lignin and polysaccharides of internode tissues were labeled by 13C and 2H, respectively. Analysis with carbon-13 nuclear magnetic re
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Fiadorwu, Joshua, Kiran Subedi, Daniel Todd, and Mufeed M. Basti. "Multipronged Approach to Profiling Metabolites in Beta vulgaris L. Dried Pulp Extracts Using Chromatography, NMR and Other Spectroscopy Methods." Foods 12, no. 18 (2023): 3510. http://dx.doi.org/10.3390/foods12183510.

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Beetroot (Beta vulgaris L.) is known for being a rich source of phytochemicals, minerals and vitamins. This study aims to show how the combination of extraction/chromatography/mass spectrometry and NMR offers an efficient way to profile metabolites in the extracts of beetroot. Such combination may lead to the identification of more nutritional or medicinal compounds in natural products, and it is essential for our ongoing investigation to study the selective adsorption/desorption of these metabolites’ on/off nanoparticles. The aqueous and organic extracts underwent analyses using UV-vis spectr
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Bhaskar, Prakash, Vasantha Kumar, Suresha Kumara Tholappanavara Hanumanthappa, and Sowmya Haliwana Banakara Vijaykumar. "2-(3,4-Dimethoxyphenyl)-N-(4-methoxyphenyl)-1-propyl-1H-benzo[d]imidazole-5-carboxamide." Molbank 2019, no. 3 (2019): M1079. http://dx.doi.org/10.3390/m1079.

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2-(3,4-Dimethoxyphenyl)-N-(4-methoxyphenyl)-1-propyl-1H-benzo[d]imidazole-5-carboxamide was synthesized by the ‘one-pot’ reductive cyclization of N-(4-methoxyphenyl)-3-nitro-4-(propylamino)benzamide with 3,4-dimethoxybenzaldehyde, using sodium dithionite as a reductive cyclizing agent using DMSO as a solvent. The structure of newly synthesized compound was elucidated based on IR, 1H-NMR, 13C-NMR, and LC-MS data.
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Bouajila, J., G. Raffin, H. Waton, C. Sanglar, J. O. Païsse, and M. F. Grenier-Loustalot. "Phenolic Resins – Characterizations and Kinetic Studies of Different Resols Prepared with Different Catalysts and Formaldehyde/Phenol Ratios (I)." Polymers and Polymer Composites 10, no. 5 (2002): 341–60. http://dx.doi.org/10.1177/096739110201000502.

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The physicochemical and kinetic properties of resols prepared with different catalysts (NaOH, LiOH and Ba(OH)2) and variable formaldehyde/phenol ratios (2.5 £ R £ 3.5) were followed to determine their effects on the mechanisms and reaction products at a fixed pH and temperature. Kinetic monitoring and quantification of residual monomers were carried out by liquid chromatography coupled with mass spectrometry (LC/UV/MS), by 13C nuclear magnetic resonance (NMR) and by chemical assay for formaldehyde. Oligomer formation (n ≥ 2) was determined by LC/UV/MS, size exclusion chromatography (SEC) and 1
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Vasilev, Aleksey A., Peter P. Grozdanov, Ivanka Nikolova, Valentin S. Lozanov, and Meglena I. Kandinska. "Ultrasonic Synthesis and Preliminary Evaluation of Anticoronaviral Activity of 6,7-Dimethoxy-4-(4-(4-methoxyphenyl)piperazin-1-yl)-1-methylquinolin-1-ium Iodide." Molbank 2022, no. 3 (2022): M1400. http://dx.doi.org/10.3390/m1400.

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Quinoline scaffold is one of the most intensively utilized pharmacophores in drug design because of the variety of activities demonstrated by different quinoline-based therapeutics or drug-candidates. Herein, we describe an environmentally tolerant two-step procedure as a convenient synthetic approach to novel chloroquine and hydroxychloroquine analogues. The structures of the newly synthesized compounds are estimated by 1H NMR, 13C NMR, LC-MS spectrometry and IR spectroscopy.
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Wojcińska, Małgorzata, Jeffrey Williams, Tom J. Mabry, et al. "Flavonol Triglycosides from the Leaves of Silphium Albiflorum." Natural Product Communications 1, no. 11 (2006): 1934578X0600101. http://dx.doi.org/10.1177/1934578x0600101105.

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In the course of chemotaxonomic studies of the genus Silphium two new and six known flavonol glycosides were isolated from the leaves of S. albiflorum. The structures of the new flavonoids were established by spectral analysis (1H NMR, 13C NMR, HMQC, HMBC, ROESY, TOCSY, MS) as isorhamnetin 3-O-α-L-rhamnosyl (1′“→6″)-O-β-D-galactopyranoside 7-O-β-D-apiofuranoside (1) and quercetin 3-O-α-L-rhamnosyl (1′“→6″)-O-β-D-galactopyranoside 7-O-β-D-apiofuranoside (2). LC-MS and LC-MSn (with post-column manganese complexation) were applied to elucidate the structures of some of the studied compounds.
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Canton, Marine, Jane Hubert, Stéphane Poigny, et al. "Dereplication of Natural Extracts Diluted in Glycerin: Physical Suppression of Glycerin by Centrifugal Partition Chromatography Combined with Presaturation of Solvent Signals in 13C-Nuclear Magnetic Resonance Spectroscopy." Molecules 25, no. 21 (2020): 5061. http://dx.doi.org/10.3390/molecules25215061.

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For scientific, regulatory, and safety reasons, the chemical profile knowledge of natural extracts incorporated in commercial cosmetic formulations is of primary importance. Many extracts are produced or stabilized in glycerin, a practice which hampers their characterization. This article proposes a new methodology for the quick identification of metabolites present in natural extracts when diluted in glycerin. As an extension of a 13C nuclear magnetic resonance (NMR) based dereplication process, two complementary approaches are presented for the chemical profiling of natural extracts diluted
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Dissertations / Theses on the topic "Lc-Hrms2 | 13c nmr"

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Cordonnier, Julien. "Toxoplasma gondii : identification par docking inverse sur des cibles moléculaires de composés actifs issus de ressources naturelles." Electronic Thesis or Diss., Reims, 2024. http://www.theses.fr/2024REIMS001.

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Les écorces d’arbres, co-produit de la sylviculture, constituent une source abondante et durable de substances naturelles. Toxoplasma gondii est le parasite responsable de la toxoplasmose, présentant une menace chez les fœtus, les nouveau-nés et les personnes immunodéprimées. Les thérapies actuelles, limitées et mal tolérées, font désormais face à des phénomènes de chimiorésistance. Ce travail de thèse a pour but d’explorer l’espace chimique associé aux écorces d’essences champardennaises, et les cibles protéiques essentielles à T. gondii. Une première évaluation in silico par docking inverse
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Conference papers on the topic "Lc-Hrms2 | 13c nmr"

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Cordonnier, J., S. Remy, A. Kotland, et al. "Enhancing natural products annotation in dual 13C-NMR and LC-HRMS2 based complex mixtures chemical profiling through custom in silico databases." In GA – 70th Annual Meeting 2022. Georg Thieme Verlag KG, 2022. http://dx.doi.org/10.1055/s-0042-1759205.

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Cordonnier, J., S. Remy, A. Kotland, et al. "Short Lecture 11 “Enhancing natural products annotation in dual 13C-NMR and LC-HRMS2 based complex mixtures chemical profiling through custom in silico databases”." In GA – 70th Annual Meeting 2022. Georg Thieme Verlag KG, 2022. http://dx.doi.org/10.1055/s-0042-1758890.

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Hussein, Ola, Feras Alali, Ala-Eddin Al Moustafa, and Ashraf Khalil. "Design, Synthesis and Biological Evaluation of Novel Chalcone Analogs as Potential Therapeutic Agents for Castration-Resistant Prostate Cancer." In Qatar University Annual Research Forum & Exhibition. Qatar University Press, 2020. http://dx.doi.org/10.29117/quarfe.2020.0179.

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Prostate cancer (PCa) is the second most frequently diagnosed malignancy, as well as a leading cause of cancer-related mortality in men globally. Despite the initial response to hormonal targeted therapy, the majority of patients ultimately progress to a lethal form of the disease, termed as castration-resistant prostate cancer (CRPC), which currently lacks curative therapeutic options and is associated with poor prognosis. Therefore, the development of novel treatment modalities for PCa is urgently needed. Chalcones, also known as 1,3-diphenyl-2-propen-1-ones, are among the highly attractive
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Journal articles
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