Showing 621 - 640 results of 1,810 for search '"Mass spectrometry"', query time: 0.06s Refine Results
  1. 621

    Effect of Pretreatment on Detection of 37 Pesticide Residues in Chrysanthemum indicum by Xiao-Ying Lu, Yan-Qin Ouyang, Wei-Ya Zeng, Cui-Qing Lin, Lu-Hua Xiao, Gui-Hua Luo, Ruo-Ting Zhan, Ping Yan

    Published 2021-01-01
    “…This study aimed to develop a method, followed by gas chromatography-mass spectrometry, for detecting 37 pesticides in Chrysanthemum indicum (C. indicum) and investigating the decrease in the matrix-induced enhancement effect. …”
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    Article
  2. 622

    Alkaloids in Processed Rhizoma Corydalis and Crude Rhizoma Corydalis Analyzed by GC/MS by Zhifeng Guo, Ru Cai, Huidan Su, Yunlong Li

    Published 2014-01-01
    “…The alkaloids in the processed Rhizoma Corydalis and the crude Rhizoma Corydalis were qualitatively and semiquantitatively analyzed using gas chromatography-mass spectrometry (GC/MS) method. The processing herb drug procedure was carried out according to the standard method of Chinese Pharmacopoeia. …”
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  3. 623

    Spray-Dried Microencapsulation of Oregano (Lippia graveolens) Polyphenols with Maltodextrin Enhances Their Stability during In Vitro Digestion by Manuel de Jesús Bernal-Millán, Erick Paul Gutiérrez-Grijalva, Laura Contreras-Angulo, M. Dolores Muy-Rangel, L. Xochitl López-Martínez, J. Basilio Heredia

    Published 2022-01-01
    “…The analyzed physical properties were morphology measured by electron microscopy and humidity; other properties evaluated were the content of total phenolic compounds, antioxidant capacity determined by DPPH and ABTS assays, and phenolic profile by ultraperformance liquid chromatography coupled to mass spectrometry (UPLC-MS). During the gastrointestinal simulation, a stability of 85% was determined in the intestinal stage. …”
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    Article
  4. 624

    Determination of 20 Neonicotinoid Insecticides and Their Metabolites in Infant Foods by a Modified QuEChERS Method Combined with HPLC-MS/MS by Liqiang Guo, Kai Li, Jinling Zhang, Guoning Tian, Ke Wang, Yajing Li

    Published 2022-01-01
    “…A rapid, effective, and reliable method for the simultaneous detection of 20 neonicotinoids and their metabolites in infant foods has been developed using liquid chromatography-tandem mass spectrometry (HPLC-MS/MS). To improve the accuracy and precision of the method, different extraction solvents, extraction methods, and adsorbents were evaluated to achieve a better recovery and clean-up effect. …”
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  5. 625

    Aerobic Biodegradation of Four Groups of Steroid Hormones in Activated Sludge by Jiaxin Zhang, Jun Luo, Hong Chang

    Published 2020-01-01
    “…An analytical method was developed for simultaneously monitoring four estrogens, seven androgens, seven progestogens, and eleven glucocorticoids in a single water sample using liquid chromatography-electrospray tandem mass spectrometry. Laboratory studies were then performed to investigate the aerobic biodegradation of 29 steroids belonging to the four groups. …”
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  6. 626

    Floral morphological and chemical analyses of Dienia flowers (Orchidaceae, Malaxidinae) relative to pollination processes by Hanna B. Margońska, Małgorzata Kozieradzka-Kiszkurno, Emilia Brzezicka, Łukasz P. Haliński, Kevin L. Davies

    Published 2025-01-01
    “…These secretions were subjected to sequential organic solvent extraction and gas chromatography-mass spectrometry. Floral structures were investigated by means of scanning and transmission electron microscopy, and subjected to histochemical tests. …”
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    Article
  7. 627

    Urine metabolomic profiles of autism and autistic traits-A twin study. by Abishek Arora, Francesca Mastropasqua, Sven Bölte, Kristiina Tammimies

    Published 2024-01-01
    “…Here, we used untargeted mass spectrometry-based urine metabolomics to investigate metabolic differences for autism diagnosis and autistic traits in a well-characterized twin cohort (N = 105). …”
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    Article
  8. 628

    Toxicity of Ulva lactuca and green fabricated silver nanoparticles against mosquito vectors and their impact on the genomic DNA of the dengue vector Aedes aegypti by Al Thabiani Aziz

    Published 2022-06-01
    “…Ulva lactuca, a green macroalgae extract analysed through gas chromatography mass spectrometry reveals 31 compounds. Resistance of mosquito vectors to synthetic insecticides remains a major problem. …”
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    Article
  9. 629

    Microwave-Assisted Digestion Using Dilute Nitric Acid and Hydrogen Peroxide for Multielement Determination in Wheat Flour by ICP-MS by Ibrahim A. Alhagri, Mosa Albeshry

    Published 2023-01-01
    “…A closed-vessel microwave digestion method was developed for the simultaneous determination of macro, micro, and toxic elements (Mg, K, Ca, Al, Mn, Fe, Cu, Zn, Se, Rb, V, Cd, and As) in wheat by inductively coupled plasma mass spectrometry (ICP-MS). A two-level factorial design with four variables was employed to determine the optimal conditions for the significant parameters. …”
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  10. 630

    Repair of Ceramic Ware in the Neolithic and Eneolithic (case study of the extreme North-East of Europe) by Viktor N. Karmanov

    Published 2024-08-01
    “…Five samples of sealants from the Final Neolithic–Eneolithic Chuzhyael culture were analyzed by gas chromatography-mass spectrometry. It was found that the adhesive materials were tar obtained by the “double pot” method – heating the raw material in one pot while pouring the product into another container. …”
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  11. 631

    Analysis of the composition, characteristics, and antifungal properties of cutin in goji berry fruits at different developmental stages by Yueli Zhou, Dayuan Chen, Cong Wang, Huaiyu Zhang, Lunaike Zhao, Junjie Wang, Qiding Peng

    Published 2025-02-01
    “…In the current study, paraffin sections and gas chromatography/mass spectrometry (GC/MS) techniques were used to identify differences in cuticle structure and chemical composition of Ningqi-1 and Ningqi-5 goji berries at different developmental stages. …”
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  12. 632

    UHPLC‐Q‐TOF‐MS/MS Dereplication to Identify Chemical Constituents of Hedera helix Leaves in Vietnam by Hong Ngoc Pham, Chieu An Tran, Thi Diep Trinh, Ngoc Lan Nguyen Thi, Huynh Nhu Tran Phan, Van Nhan Le, Ngoc Hung Le, Van Trung Phung

    Published 2022-01-01
    “…Methanolic extract of ivy had been analyzed by ultra-high-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UHPLC‐Q‐TOF‐MS/MS). MS, and MS/MS experiments were manipulated using both negative and positive ionization modes to provide molecular mass information and production spectra for the structural elucidation of compounds. …”
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  13. 633

    Clinical and genetic analysis of methylmalonic aciduria in 60 patients from Southern China: a single center retrospective study by Hiba Abid, Areeba Abid, Sarah Sohail, Sara Jawaid

    Published 2025-02-01
    “…Additionally, we discuss the limitations of first-tier newborn screening tests due to high false positive rates and recommend second-tier testing using liquid chromatography coupled with tandem mass spectrometry to increase specificity and reduce false positives. …”
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    Article
  14. 634

    Applying of Factor Analyses for Determination of Trace Elements Distribution in Water from River Vardar and Its Tributaries, Macedonia/Greece by Stanko Ilić Popov, Trajče Stafilov, Robert Šajn, Claudiu Tănăselia, Katerina Bačeva

    Published 2014-01-01
    “…Analyses were performed by mass spectrometry with inductively coupled plasma (ICP-MS) and atomic emission spectrometry with inductively coupled plasma (ICP-AES). …”
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  15. 635

    Chemical Components of Teak Wood with Eccentric Growth by Ganis Lukmandaru

    Published 2011-01-01
    “…By means of Gas Chromatography (GC) and Gas Chromatography-Mass Spectrometry (GC-MS), no striking difference was also observed in the levels of major components of ethanol-benzene extracts. …”
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  16. 636

    A Cell Model for Conditional Profiling of Androgen-Receptor-Interacting Proteins by K. A. Mooslehner, J. D. Davies, I. A. Hughes

    Published 2012-01-01
    “…For this purpose, male genital development relevant mouse cell lines were genetically modified to express a tagged version of wild-type AR, allowing copurification of multiprotein complexes under native conditions followed by mass spectrometry. We report 57 known wild-type AR-interacting proteins identified in cells grown under proliferating and 65 under nonproliferating conditions. …”
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    Article
  17. 637

    Two-layer homolog network approach for PFAS nontarget screening and retrospective data mining by Zhaoyu Jiao, Sachi Taniyasu, Nanyang Yu, Xuebing Wang, Nobuyoshi Yamashita, Si Wei

    Published 2025-01-01
    “…Here, we develop a two-layer homolog network approach for PFAS nontarget screening using mass spectrometry. The first layer constructs networks between homologs, with evaluation showing that it filters 94% of false candidates. …”
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    Article
  18. 638

    The RNA-dependent association of phosphatidylinositol 4,5-bisphosphate with intrinsically disordered proteins contribute to nuclear compartmentalization. by Martin Sztacho, Jakub Červenka, Barbora Šalovská, Ludovica Antiga, Peter Hoboth, Pavel Hozák

    Published 2024-12-01
    “…In this study, we unveiled the RNA-dependent PIP2-associated (RDPA) nuclear proteome in human cells by mass spectrometry. We found that intrinsically disordered regions (IDRs) with polybasic PIP2-binding K/R motifs are prevalent features of RDPA proteins. …”
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    Article
  19. 639

    Volatile organic compounds of Thai honeys produced from several floral sources by different honey bee species. by Praetinee Pattamayutanon, Sergio Angeli, Prodpran Thakeow, John Abraham, Terd Disayathanoowat, Panuwan Chantawannakul

    Published 2017-01-01
    “…The volatile organic compounds (VOCs) of four monofloral and one multifloral of Thai honeys produced by Apis cerana, Apis dorsata and Apis mellifera were analyzed by headspace solid-phase microextraction (HS-SPME) followed by gas chromatography and mass spectrometry (GC-MS). The floral sources were longan, sunflower, coffee, wild flowers (wild) and lychee. …”
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    Article
  20. 640

    The gut microbiota-SCFA-inflammation axis in patients with AECOPD. by Hengjing Zhu, Chen Wu, Haiyan Wu, Juan Liu, Wu Ye, Tian Zhao, Zhijun Li

    Published 2025-01-01
    “…Fatty acid concentrations were determined in lumen via gas chromatography-mass spectrometry. The richness and diversity of gut microbiota were decreased in AECOPD patients. β-diversity analysis revealed differences between AECOPD patients and healthy controls. p_Bacteroidetes, g_Paraprevotella, g_Ruminococcus2, g_Parasutterella, o_Rhodospirillales, and g_Romboutsia in the healthy controls and p_Firmicutes, o_Actinomycetales, f_Actinomycetadeae, g_Actinomyces, g_Mogibacterium, f_Veillonellaceae, f_Enterococcaceae, and g_Enterococcus in AECOPD patients were the most abundant microbiota. …”
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