Showing 701 - 720 results of 1,443 for search '"mass spectrometry"', query time: 0.13s Refine Results
  1. 701

    Inflammatory Markers Are Positively Associated with Serum trans-Fatty Acids in an Adult American Population by Mohsen Mazidi, Hong-kai Gao, Andre Pascal Kengne

    Published 2017-01-01
    “…TFAs were measured via capillary gas chromatography and mass spectrometry using negative chemical ionization. Analysis of covariance and multivariable-adjusted linear regression models were used to investigate the associations between these parameters, accounting for the survey design. …”
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  2. 702

    Assessing environmental and human health risks of pharmaceutical contamination in surface water by Ioana-Antonia Cimpean, Florentina Laura Chiriac, Diana Constantinescu-Groposila, Victor Constantin Cojocaru, Vasile Ion Iancu

    Published 2024-12-01
    “…The most commonly employed techniques include solid phase extraction (SPE) followed by high-performance liquid chromatography coupled with mass spectrometry (HPLC/MS). This study supports ongoing efforts to monitor and regulate drug contamination in water sources, evaluating potential risks to human health and emphasizing the importance of addressing these contaminants to protect environmental and public health.…”
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  3. 703

    Proteomic Analysis of the Vitreous following Experimental Retinal Detachment in Rabbits by Nakul Mandal, Geoffrey P. Lewis, Steven K. Fisher, Steffen Heegaard, Jan U. Prause, Morten la Cour, Henrik Vorum, Bent Honoré

    Published 2015-01-01
    “…The vitreous samples were evaluated with two-dimensional polyacrylamide gel electrophoresis and the differentially expressed proteins were identified with tandem mass spectrometry. Results. Ten protein spots were found to be at least twofold differentially expressed when comparing the vitreous samples of the sham and retinal detachment surgery groups. …”
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  4. 704

    Diversity and sex differences in rectal gland volatiles of Queensland fruit fly, Bactrocera tryoni (Diptera: Tephritidae). by Cynthia Castro-Vargas, Gunjan Pandey, Heng Lin Yeap, Michael J Lacey, Siu Fai Lee, Soo J Park, Phillip W Taylor, John G Oakeshott

    Published 2022-01-01
    “…We used solid-phase microextraction (SPME) plus gas chromatography-mass spectrometry (GC-MS) and gas chromatography-flame ionization detection (GC-FID) to substantially expand rectal gland chemical characterisation of the Queensland fruit fly (Bactrocera tryoni (Diptera: Tephritidae); Qfly). …”
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  5. 705

    Identification and Screening of Natural Neuraminidase Inhibitors from Reduning Injection via One-Step High-Performance Liquid Chromatography-Fraction Collector and UHPLC/Q-TOF-MS by Lijun An, Xie-An Yu, Wei Liu, Jin Li, Yan-Xu Chang

    Published 2020-01-01
    “…The one-step high-performance liquid chromatography-fraction collector (HPLC-FC) was selected to prepare fractions from Reduning (RDN) injection, while ultra-high-performance liquid chromatography/quadrupole-time-of-flight mass spectrometry (UHPLC/Q-TOF-MS) was used to identify fractions depending on their retention time and molecular ion. …”
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  6. 706

    Evaluation of Plasma Amino Acid Levels in Preterm Infants and Their Potential Correlation with Retinopathy of Prematurity by Yasin Ozcan, Gumus Huseyin, Kenan Sonmez

    Published 2020-01-01
    “…Plasma aa levels were analyzed using liquid chromatography with tandem mass spectrometry (LC-MS/MS). Correlation test and multivariate regression analysis were used to evaluate the relationship between plasma aa levels and variables. …”
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  7. 707

    Streptomyces sp. strain MUSC 5 from mangrove forest in Malaysia: Identification, antioxidant potential and chemical profiling of its methanolic extract by Hefa Mangzira Kemung, Loh Teng-Hern Tan, Kok-Gan Chan, Hooi-Leng Ser, Jodi Woan-Fei Law, Bey Hing Goh

    Published 2020-05-01
    “…Furthermore, Gas chromatography Mass Spectrometry (GC-MS) was used to determine the presence of biologically active chemical compounds in methanolic extract of Streptomyces sp. strain MUSC 5. …”
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  8. 708

    Comprehensive analysis of ionomic profiling in Chlorella exposed to chlorpyrifos by Qing-Qing Yu, Yulong Zhang, Shiyuan Zhao, Min Pang, Pei Jiang, Pei Qu

    Published 2025-02-01
    “…However, little is known about the toxicological mechanism of CPF on marine microalgae, which is the main primary producer in the marine ecosystem.MethodsThis study explored the ion changes of microalgae Chlorella vulgaris under the stress of CPF through Inductively Coupled Plasma Mass Spectrometry (ICP-MS).ResultsSignificant disparities in ionomics among control and treatment group were observed through pattern recognition analysis (principal component analysis, PCA; orthogonal partial least squares discriminant analysis, OPLS-DA), indicating that CPF may impede their growth by disrupting the homeostasis of crucial elements within algal cells.DiscussionThis study elucidated the inhibitory impact of CPF on green algae growth and its potential mechanism of toxicity through ICP-MS, providing crucial insights for a comprehensive understanding of the influence of organophosphorus pesticides on aquatic ecosystems.…”
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  9. 709

    Cell Labeling with 15-YNE Is Useful for Tracking Protein Palmitoylation and Metabolic Lipid Flux in the Same Sample by Nadine Merz, Karin Schilling, Dominique Thomas, Lisa Hahnefeld, Sabine Grösch

    Published 2025-01-01
    “…In this study, we developed a method to track 15-YNE incorporation into lipids using liquid chromatography high-resolution mass spectrometry (LC-HRMS) as well as protein palmitoylation in the same sample. …”
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  10. 710

    Effect of H2O2 induced oxidative stress on volatile organic compounds in differentiated 3T3-L1 cells by Adebowale Samuel Oyerinde, Vaithinathan Selvaraju, Melissa Boersma, Jeganathan Ramesh Babu, Thangiah Geetha

    Published 2025-01-01
    “…The effect of OS on cell metabolism was analyzed by detecting VOCs in the headspace of the cells using solid phase micro extraction (SPME) and gas chromatography-mass spectrometry (GCMS). Our findings indicate that H2O2 concentrations exceeding 300 µM induce significant OS, leading to adipocyte apoptosis, as evidenced by various assays. …”
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  11. 711

    Multifaceted roles of melatonin: Investigating coffee leaf melatonin concentration as a potential indicator of vegetative growth by Siswanto Dian, Nanda Aldian Dwi, Muwahida Imroatin, Istiqomah Nurul, Munawarti Aminatun, Mastuti Retno

    Published 2025-01-01
    “…Our research posits that melatonin concentrations vary with leaf age and can be effectively detected through Thin Layer Chromatography (TLC) and Liquid Chromatography-Mass Spectrometry (LC-MS) analysis. Results showed that all leaf samples—young, middle-aged, and old—from both species exhibited melatonin, confirming its role in various physiological processes. …”
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  12. 712

    Proteomic Analysis of Saliva Identifies Potential Biomarkers for Orthodontic Tooth Movement by Mohd Faiz Ellias, Shahrul Hisham Zainal Ariffin, Saiful Anuar Karsani, Mariati Abdul Rahman, Shahidan Senafi, Rohaya Megat Abdul Wahab

    Published 2012-01-01
    “…Differentially expressed protein spots were then identified by MALDI-TOF/TOF tandem mass spectrometry. Nine proteins were found to be differentially expressed; however, only eight were identified by MALDI-TOF/TOF. …”
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  13. 713

    Assessing the Proteomic Activity of the Venom of the Ant Ectatomma tuberculatum (Hymenoptera: Formicidae: Ectatomminae) by Juliana Rocha da Silva, Aline Zanotelli de Souza, Carlos Priminho Pirovani, Helena Costa, Aline Silva, João Carlos Teixeira Dias, Jacques Hubert Charles Delabie, Renato Fontana

    Published 2018-01-01
    “…In this study, we have identified proteins from the venom of Ectatomma tuberculatum by means of 2D PAGE, followed by tandem nanochromatography with mass spectrometry. A total of 48 proteins were identified, of which 42 are involved in metabolic processes, transport, and structural support. …”
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  14. 714

    Identification and characterization of a novel tetrapeptide from enzymatic hydrolysates of Baijiu byproduct by Qiang Wu, Changqing Zhong, Guirong Zeng, Xu Zhang, Liping Xiang, Chang Wan, Yougui Yu

    Published 2022-11-01
    “…A superior ACE inhibitory peptide was separated and purified by ultrafiltration and high-performance liquid chromatography (HPLC), and its amino acid sequence was further identified as Gln-Gly-Val-Pro (QGVP) by electrospray mass spectrometry (ESI-MS). QGVP formed 6 hydrogen bonds with the active site of ACE, which is responsible for reducing α-helix structure content of ACE causing subsequent inactivation. …”
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  15. 715

    The First Infant Bloodstream Infection Caused by Pantoea dispersa in China: A Case Report and Literature Review by Yu W, Sun Z, Wang M, Li Z, Zhang C, Sun Y, Wang S

    Published 2025-02-01
    “…With the advancement in mass spectrometry and gene sequencing technologies, human infections caused by Pantoea have increasingly been recognized, raising concerns regarding its pathogenicity and nosocomial transmission that clinicians must address. …”
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  16. 716

    Identification of Volatile Compounds and Insecticidal Activity of Essential Oils from Origanum compactum Benth. and Rosmarinus officinalis L. against Callosobruchus maculatus (Fab.... by Asmae Baghouz, Yamna Bouchelta, Imane Es-safi, Mohammed Bourhia, El Moussaoui Abdelfattah, Abdullah A. Alarfaj, Abdurahman Hajinur Hirad, Hiba-Allah Nafidi, Raja Guemmouh

    Published 2022-01-01
    “…(EOR) were extracted by use of hydrodistillation, and their volatile compounds were profiled by gas chromatography-mass spectrometry (GC-MS). The insecticidal activity of extracted EOC and EOR was evaluated against C. maculatus. …”
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  17. 717

    Investigation of CO2 Extract of Portulaca oleracea for Antioxidant Activity from Raw Material Cultivated in Kazakhstan by Meruyert I. Tleubayeva, Raisa M. Abdullabekova, Ubaidilla М. Datkhayev, Margarita Yu. Ishmuratova, Mereke B. Alimzhanova, Kaldanay K. Kozhanova, Aida M. Seitaliyeva, Kairat S. Zhakipbekov, Zhanar B. Iskakova, Elmira A. Serikbayeva, Elena V. Flisyuk

    Published 2022-01-01
    “…Gas chromatography-mass spectrometry (GC-MS) chemical analysis of Portulaca oleracea CO2 extract dissolved in hexane revealed 37 components, including a complex mixture of aldehydes, alkanes, alkenes, esters, diterpenes, steroids, vitamin E, and carbohydrates. …”
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  18. 718

    Synthesis, Spectroscopic Characterization, and Biological Evaluation Studies of 5-Bromo-3-(((hydroxy-2-methylquinolin-7-yl)methylene)hydrazono)indolin-2-one and Its Metal (II) Comp... by Kuruba Siddappa, Nabiya Sultana Mayana

    Published 2014-01-01
    “…The Schiff base ligand 5-bromo-3-(((8-hydroxy-2-methylquinolin-7-yl)methylene)hydrazono)indolin-2-one (BHMQMHI) was prepared via condensation of 5-bromo-3-hydrazonoindolin-2-one and 7-formyl-8-hydroxy-2-methylquinoline and its Co(II), Ni(II), Cu(II), Zn(II), Cd(II), and Hg(II) complexes have been synthesized and characterized by elemental analysis, conductance data, magnetic susceptibility measurements, IR, UV-Vis, mass spectrometry, 1H NMR, ESR, XRD, and thermal studies. …”
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  19. 719

    Copepod Lipidomics: Fatty Acid Substituents of Structural Lipids in <i>Labidocerca aestiva</i>, a Dominant Species in the Food Chain of the Apalachicola Estuary of the Gulf of Mexi... by Paul L. Wood, Stan C. Kunigelis

    Published 2024-12-01
    “…We utilized high-resolution tandem mass spectrometry (≤2 ppm mass error) to characterize the fatty acid substituents of triacylglycerols, glycerophosphocholines, ceramides, and sphingomyelins of <i>Labidocerca aestiva</i>. …”
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  20. 720

    Stability Study of Algerian Nigella sativa Seeds Stored under Different Conditions by Muhammad Safwan Ahamad Bustamam, Kamarul Arifin Hadithon, Ahmed Mediani, Faridah Abas, Yaya Rukayadi, Nordin Lajis, Khozirah Shaari, Intan Safinar Ismail

    Published 2017-01-01
    “…Six replicates each were prepared and analyzed with Headspace-Gas Chromatography-Mass Spectrometry (HS-GC-MS) for three time points at the initial (1st day (0)), 14th (1), and 28th (2) day of storage. …”
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