Showing 1,561 - 1,580 results of 1,792 for search '"chromatography"', query time: 0.06s Refine Results
  1. 1561

    Antibacterial, Antibiofilm, and Efflux Pump Inhibitory Properties of the Crude Extract and Fractions from Acacia macrostachya Stem Bark by Akua Frema Barfour, Abraham Yeboah Mensah, Evelyn Asante-Kwatia, Cynthia Amaning Danquah, Daniel Anokwah, Silas Adjei, Michael Kwesi Baah, Merlin L. K. Mensah

    Published 2021-01-01
    “…A crude methanol extract obtained by Soxhlet extraction was partitioned by column chromatography to obtain the petroleum ether, ethyl acetate, and methanol fractions. …”
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  2. 1562

    Etodolac Single Dose Metabolic Profile Elucidation: Pharmacokinetics and Adverse Events in Healthy Volunteers by Karen Sánchez-Luquez, Anne Michelli Reis Silveira, Salvador Sánchez-Vinces, Alex Ap. Rosini Silva, Joyce Barreto, Rhubia Bethania Socorro Lemos de Brito, Caroline de Moura Garcia, Ana Lais Vieira, Marcia Ap. Antonio, Patrícia de Oliveira Carvalho

    Published 2025-01-01
    “…Pharmacokinetic profiles were determined using tandem mass spectrometry analysis, and the metabolomic profiling was conducted using baseline samples (pre-dose) and samples at maximum drug concentration (post-dose) via liquid chromatography coupled with a quadrupole time-of-flight mass spectrometer. …”
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  3. 1563

    Multianalytical Method Validation for Qualitative and Quantitative Analysis of Solvents of Abuse in Oral Fluid by HS-GC/MS by Bruna Claudia Coppe, Bruna Tassi Borille, Taís Regina Fiorentin, Ana Laura Bemvenuti Jacques, Ana Claudia Fagundes, Stela Maris de Jezus Castro, Lysa Silveira Remy, Flavio Pechansky, Renata Pereira Limberger

    Published 2016-01-01
    “…Thus, the present work aimed to develop and validate an analytical method for quantification and detection of solvents used as inhalants of abuse in oral fluid (OF), using Quantisal™ as collector device by headspace and gas chromatography coupled with a mass detector (HS-GC/MS). …”
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  4. 1564

    Profiles of Killer Systems and Volatile Organic Compounds of Rowanberry and Rosehip-Inhabiting Yeasts Substantiate Implications for Biocontrol by Iglė Vepštaitė-Monstavičė, Juliana Lukša-Žebelovič, Violeta Apšegaitė, Raimondas Mozūraitis, Robertas Lisicinas, Ramunė Stanevičienė, Laima Blažytė-Čereškienė, Saulius Serva, Elena Servienė

    Published 2025-01-01
    “…The selected <i>H. uvarum</i>, <i>M. pulcherrima</i>, <i>S. cerevisiae</i>, and <i>S. paradoxus</i> yeast strains representing both berries were applied for VOC analysis and identification by gas chromatography-linked mass spectrometry. It was revealed that the patterns of emitted volatiles are yeast species-specific. …”
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  5. 1565

    In vitro and in vivo investigations of selected varieties of Areca catechu L - Phytochemical analysis, antiulcer, and wound healing activity by R. Deveswaran, D.J. Madhu Kumar, V. Madhavan, Soma Chaki, Misbah Khan, Govind R. Kadambi, B.V. Basavaraj, J. Anbu

    Published 2025-05-01
    “…High-performance thin Layer Chromatography (HPTLC) was employed to quantify the percentage of arecoline, ranging from 0.12 % to 0.95 % in the samples. …”
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  6. 1566

    Optimized extraction and kinetic study of cholesterol oxidase from a newly isolated Escherichia fergusonii strain from local whey samples: insights through a combined experimental... by Simin Khataee, Gholamreza Dehghan, Samaneh Rashtbari, Arezu Marefat, Sina Jamei, Hamed Farzi-Khajeh

    Published 2025-01-01
    “…The crude product was purified by ammonium sulfate precipitation and followed by ion exchange chromatography utilizing Q-Sepharose, resulting in 5.35-fold and 13.86-fold purification, respectively, with a final specific activity of 15.8 U/mg. …”
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  7. 1567

    Nonspecific response of Lake Baikal phytoplankton to anthropogenic impact by A. A. Nikonova, S. S. Vorobyeva

    Published 2022-09-01
    “…Using the method of gas chromatography, we showed a lower (up to 15 %) content of polyunsaturated fatty acids in phytoplankton characterized by stress occurrence. …”
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  8. 1568

    Determination of Organophosphorus Esters in Fall Protection Equipment by Accelerated Solvent Extraction and Solid-Phase Extraction Coupled with LC-MS/MS Detection by Haihong Li, Mingli Ye, Fangfang Wu, Xuyang Zhao, Lifeng Wang, Yili Wei, Shengyi Xie, Hairong Cui

    Published 2021-01-01
    “…An analysis method was established to determine 14 organophosphorus ester (OPE) flame retardants in fall protection equipment by combining accelerated solvent extraction (ASE) and solid-phase extraction (SPE) with high-performance liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). …”
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  9. 1569

    Lack of Male-Female Differences in Disposition and Esterase Hydrolysis of Ramipril to Ramiprilat in Healthy Volunteers after a Single Oral Dose by Tom B. Vree, Erik Dammers, Ivan Ulc, Stefan Horkovics-Kovats, Miroslav Ryska, IJsbrand Merkx

    Published 2003-01-01
    “…Plasma ramipril and ramiprilat concentrations were determined according to validated methods involving liquid chromatography-mass spectrometry. A total number of 2 � 34 available plasma concentration-time curves of both the parent drug and the metabolite could be analysed, and variations (50�100% coefficient of variation [CV]) in plasma concentrations of both parent drug and metabolite were found. …”
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  10. 1570

    Aflatoxin M1 Concentrations, Adulterants, Microbial Loads, and Physicochemical Properties of Raw Milk Collected From Nekemte City, Ethiopia by Leila Nasir, Habtamu Fekadu Gemede

    Published 2024-01-01
    “…The AFM1 concentration was determined by high-performance liquid chromatography (HPLC) with a Sigma-Aldrich standard (St. …”
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  11. 1571

    Assessment of phytochemical screening, antibacterial, analgesic, and antipyretic potentials of Litsea glutinosa (L.) leaves extracts in a mice model. by Zubair Khalid Labu, Samira Karim, Md Tarekur Rahman, Md Imran Hossain, Sarder Arifuzzaman, Md Shakil

    Published 2025-01-01
    “…<h4>Methods</h4>In this study, we conducted an initial investigation of the major phytochemical groups present in L. glutinosa leaves using both modern chromatographic techniques, specifically High-Performance Liquid Chromatography (HPLC), and conventional phytochemical screening methods applied to cold methanol extracts. …”
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  12. 1572

    Occurrence and bioaccumulation of organophosphate flame retardants in high-altitude regions: A comprehensive field survey in Qinghai Province, China by Haibao Zhu, Jinlin Hu, Zheng Ruan, Danhua Liu, Meirong Zhao

    Published 2025-01-01
    “…Herein, a general pretreatment method for OPFRs across various sample matrices was established and combined with gas chromatography-mass spectrometry (GC-MS), utilizing a programmed temperature ramp in the vaporization chamber to enable high-throughput detection of OPFRs in various environmental matrices. …”
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  13. 1573

    HEMPSEED AND COTTONSEED OILS IN THE ACCESSIONS FROM THE VIR COLLECTION AS SOURCES OF FUNCTIONAL FOOD INGREDIENTS by S. V. Grigoryev, T. V. Shelenga, K. V. Illarionova

    Published 2019-10-01
    “…The PUFA profile was measured using gas chromatography with mass spectrometry equipment (Agilent 6850, USA). …”
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  14. 1574

    Skeletal Site-Specific Lipid Profile and Hematopoietic Progenitors of Bone Marrow Adipose Tissue in Patients Undergoing Primary Hip Arthroplasty by Drenka Trivanović, Marko Vujačić, Aleksandra Arsić, Tamara Kukolj, Milica Rajković, Nikola Bogosavljević, Zoran Baščarević, Mirjana Maljković Ružičić, Jovana Kovačević, Aleksandra Jauković

    Published 2025-01-01
    “…BM, BMAT, and gfSAT were explored at the levels of total lipids, fatty acids, and cells by using thin-layerand gas chromatography, ex vivo cellular assays, and flow cytometry. …”
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  15. 1575

    Changes in glycosphingolipid levels in plasma and cerebrospinal fluid of individuals with Lysosomal Free Sialic Acid Storage Disorder by Marya S. Sabir, Lynne Wolfe, David R. Adams, Carla Ciccone, Forbes D. Porter, William A. Gahl, Marjan Huizing, Frances M. Platt, May Christine V. Malicdan

    Published 2025-01-01
    “…This study investigated GSL levels in FSASD plasma and cerebrospinal fluid (CSF) using two normal-phase high-performance liquid chromatography assays. In plasma, GM1a was significantly elevated, while GM2 was decreased, with no significant alterations in other GSL species. …”
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  16. 1576

    Integrated SegFlow, µSIA, and UPLC for Online Sialic Acid Quantitation of Glycoproteins Directly from Bioreactors by Letha Chemmalil, Tanmay Kulkarni, Mathura Raman, Priya Singh, Yueming Qian, Chris Chumsae, Kyle McHugh, Zhuangrong Huang, Eric Hodgman, Michael C. Borys, Julia Ding, Gloria Li, Anthony Leone

    Published 2025-01-01
    “…The system consists of a micro‐sequential injection analyzer (µSIA) interfaced with SegFlow and an ultra performance liquid chromatography (UPLC). The fully automated architecture exemplifies the execution of online sampling, automatic sample preparation, and subsequent online UPLC analysis. …”
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  17. 1577

    Comparative Analysis of Chemical Composition and Antibacterial Activity of Essential Oils from Five Varieties of <i>Lavender</i> Extracted via Supercritical Fluid Extraction by Lijing Lin, Zhencheng Lv, Meiyu Wang, Ankang Kan, Songling Zou, Bin Wu, Limin Guo, Salamet Edirs, Jiameng Liu, Lin Zhu

    Published 2025-01-01
    “…This study aimed to determine the chemical composition of five <i>Lavender</i> essential oils (LEOs) using the gas chromatography–mass spectroscopy technique and to assess their antibacterial activity against four marine <i>Vibrio</i> species, including <i>Shewanella algae</i>, <i>Shewanella maridflavi</i>, <i>Vibrio harveyi</i>, and <i>Vibrio alginolyticus</i>. …”
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  18. 1578

    Saussurea gossypiphora extracts reduce inflammation by reversing inflammatory cytokine levels in in-vitro and in-vivo by Kalyani Jatoth, Pawan Kumar Anoor, Ramesh Kande, Sandeepta Burgula

    Published 2025-02-01
    “…Methods: The antioxidant activities of Methanolic extracts of flowers of Saussurea gossypiphora (MESGD) were examined using 1,1-diphenyl-2-picrylhydrazyl assay. Gas Chromatography Mass Spectrometric investigation revealed the presence of various bio-active constituents. …”
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  19. 1579

    Maize Fungal Growth Control with Scopoletin of Cassava Roots Produced in Benin by Rafiatou Ba, Teou Alfa, Fernand Gbaguidi, Kosi Mawuéna Novidzro, Kokouvi Dotse, Koffi Koudouvo, Ursula Houngue, Marcel T. Donou Hounsode, Kossi Honoré Koumaglo, Yaovi Ameyapoh, Lamine Baba-Moussa

    Published 2017-01-01
    “…The dosage of scopoletin from parts of the root (first skin, second skin, whole root, and flesh) was done by High Performance Liquid Chromatography. The scopoletin extract was used to assess the activity of 12 strains (11 strains of maize and a reference strain). …”
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  20. 1580

    Red Currant (<i>Ribes rubrum</i> L.) Fruit Waste Extract and Juice as Potential Spasmolytic Agents by Maja Cvetković, Bojana Miladinović, Suzana Branković, Milica Randjelović, Slavoljub Živanović, Nemanja Kitić, Milica Milutinović, Miloš Jovanović, Dušica Stojanović, Haris Nikšić, Katarina Šavikin, Dušanka Kitić

    Published 2025-01-01
    “…The flavonol and anthocyanin contents of the samples were determined using high-performance liquid chromatography. The antispasmodic effects were assessed in in vitro conditions, and the potential impact of the samples and possible action mechanisms were revealed. …”
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