Relevant bibliographies by topics / UPLC-ESI(±)-HRMS

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  2. Dissertations / Theses

Academic literature on the topic 'UPLC-ESI(±)-HRMS'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "UPLC-ESI(±)-HRMS"

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Zangrando, Roberta, Veronica Zanella, Ornela Karroca, et al. "Dissolved organic matter in the deep TALDICE ice core: A nano-UPLC-nano-ESI-HRMS method." Science of The Total Environment 700 (January 2020): 134432. http://dx.doi.org/10.1016/j.scitotenv.2019.134432.

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Perlatti, Bruno, Nan Lan, Yongying Jiang, Zhiqiang An, and Gerald Bills. "Identification of Secondary Metabolites from Aspergillus pachycristatus by Untargeted UPLC-ESI-HRMS/MS and Genome Mining." Molecules 25, no. 4 (2020): 913. http://dx.doi.org/10.3390/molecules25040913.

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Aspergillus pachycristatus is an industrially important fungus for the production of the antifungal echinocandin B and is closely related to model organism A. nidulans. Its secondary metabolism is largely unknown except for the production of echinocandin B and sterigmatocystin. We constructed mutants for three genes that regulate secondary metabolism in A. pachycristatus NRRL 11440, and evaluated the secondary metabolites produced by wild type and mutants strains. The secondary metabolism was explored by metabolic networking of UPLC-HRMS/MS data. The genes and metabolites of A. pachycristatus
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Revelou, Panagiota-Kyriaki, Maroula G. Kokotou, and Violetta Constantinou-Kokotou. "Identification of Auxin Metabolites in Brassicaceae by Ultra-Performance Liquid Chromatography Coupled with High-Resolution Mass Spectrometry." Molecules 24, no. 14 (2019): 2615. http://dx.doi.org/10.3390/molecules24142615.

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Auxins are signaling molecules involved in multiple stages of plant growth and development. The levels of the most important auxin, indole-3-acetic acid (IAA), are regulated by the formation of amide and ester conjugates with amino acids and sugars. In this work, IAA and IAA amide conjugates with amino acids bearing a free carboxylic group or a methyl ester group, along with some selected IAA metabolites, were studied in positive and negative electrospray ionization (ESI) modes, utilizing high-resolution mass spectrometry (HRMS) as a tool for their structural analysis. HRMS/MS spectra revealed
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Jerman Klen, Tina, Alenka Golc Wondra, Urška Vrhovšek, and Branka Mozetič Vodopivec. "Phenolic Profiling of Olives and Olive Oil Process-Derived Matrices Using UPLC-DAD-ESI-QTOF-HRMS Analysis." Journal of Agricultural and Food Chemistry 63, no. 15 (2015): 3859–72. http://dx.doi.org/10.1021/jf506345q.

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Bourhim, Thouria, Myra O. Villareal, François Couderc, Abdellatif Hafidi, Hiroko Isoda, and Chemseddoha Gadhi. "Melanogenesis Promoting Effect, Antioxidant Activity, and UPLC-ESI-HRMS Characterization of Phenolic Compounds of Argan Leaves Extract." Molecules 26, no. 2 (2021): 371. http://dx.doi.org/10.3390/molecules26020371.

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The use of natural products for the regulation of skin pigmentation is gaining popularity. In the present study, we evaluated the effect of argan leaves extract (ALE) on melanogenesis in B16 melanoma cells, determined its antioxidant activity, then quantified and identified its phenolic components. B16 cells were treated with various concentrations of ALE, then the cell viability and proliferation were assessed using MTT assay while the melanin content was determined using spectrophotometric methods. The expression level of tyrosinase (TYR), tyrosinase related protein-1 (TRP-1) and dopachrome
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Stander, Maria A., Herman Redelinghuys, Keabetswe Masike, Helen Long, and Ben-Erik Van Wyk. "Patterns of Variation and Chemosystematic Significance of Phenolic Compounds in the Genus Cyclopia (Fabaceae, Podalyrieae)." Molecules 24, no. 13 (2019): 2352. http://dx.doi.org/10.3390/molecules24132352.

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As a contribution towards a better understanding of phenolic variation in the genus Cyclopia (honeybush tea), a collection of 82 samples from 15 of the 23 known species was analysed using liquid-chromatography–high resolution mass spectrometry (UPLC-HRMS) in electrospray ionization (ESI) negative mode. Mangiferin and isomangiferin were found to be the main compounds detected in most samples, with the exception of C. bowiena and C. buxifolia where none of these compounds were detected. These xanthones were found to be absent from the seeds and also illustrated consistent differences between spe
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Ayciriex, Sophie, Anne Regazzetti, Mathieu Gaudin, et al. "Development of a novel method for quantification of sterols and oxysterols by UPLC-ESI-HRMS: application to a neuroinflammation rat model." Analytical and Bioanalytical Chemistry 404, no. 10 (2012): 3049–59. http://dx.doi.org/10.1007/s00216-012-6396-6.

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Croyal, M., V. Ferchaud-Roucher, S. Crossouard, K. Ouguerram, E. Nobécourt-Dupuy, and M. Krempf. "P214 Étude isotopique globale des lipides plasmatiques par chromatographie liquide couplée à la spectrométrie de masse haute résolution (UPLC-ESI-HRMS)." Diabetes & Metabolism 41 (March 2015): A87. http://dx.doi.org/10.1016/s1262-3636(15)30327-x.

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Li, Hua, Lanying Wang, and Yanping Luo. "Composition Analysis by UPLC-PDA-ESI (−)-HRMS and Antioxidant Activity Using Saccharomyces cerevisiae Model of Herbal Teas and Green Teas from Hainan." Molecules 23, no. 10 (2018): 2550. http://dx.doi.org/10.3390/molecules23102550.

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Different teas from everywhere are very useful and have been extensively studied. We studied the antioxidant activity of herbal teas and green teas from Hainan, Mallotus oblongifolius Muell. Arg. (MO), Ilex kudingcha C.J. Tseng (KD), Camellia sinensis var. assamica (J. W. Mast.) Kitam. Hainan Dayezhong (DY), and Camellia sinensis (L.) O. Ktze. (produced from Hainan Baisha (BS)). The total phenol content and total flavonoid content from water extracts, resin extracts and fractions of herbal teas and green teas were compared. Later, eight fractions of herbal teas and green teas were subjected to
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Zhang, Qun, Yongfu Xu, and Long Jia. "Secondary organic aerosol formation from OH-initiated oxidation of <i>m</i>-xylene: effects of relative humidity on yield and chemical composition." Atmospheric Chemistry and Physics 19, no. 23 (2019): 15007–21. http://dx.doi.org/10.5194/acp-19-15007-2019.

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Abstract. The effect of relative humidity (RH) on secondary organic aerosol (SOA) formation from the photooxidation of m-xylene initiated by OH radicals in the absence of seed particles was investigated in a Teflon reactor. The SOA yields were determined based on the particle mass concentrations measured with a scanning mobility particle sizer (SMPS) and reacted m-xylene concentrations measured with a gas chromatograph–mass spectrometer (GC-MS). The SOA components were analyzed using a Fourier transform infrared (FTIR) spectrometer and an ultrahigh-performance liquid chromatograph–electrospray
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Dissertations / Theses on the topic "UPLC-ESI(±)-HRMS"

1

Kouloura, Eirini. "Phytochemical investigation of Acronychia species using NMR and LC-MS based dereplication and metabolomics approaches." Thesis, Paris 5, 2014. http://www.theses.fr/2014PA05P636/document.

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Les plantes médicinales constituent une source inexhaustible de composés (des produits naturels - PN) utilisé en médecine pour la prévention et le traitement de diverses maladies. L'introduction de nouvelles technologies et méthodes dans le domaine de la chimie des produits naturels a permis le développement de méthodes ‘high throughput’ pour la détermination de la composition chimique des extraits de plantes, l'évaluation de leurs propriétés et l'exploration de leur potentiel en tant que candidats médicaments. Dernièrement, la métabolomique, une approche intégrée incorporant les avantages des
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