Showing 541 - 560 results of 693 for search '"Gas Chromatography"', query time: 0.07s Refine Results
  1. 541

    Ossification Vesicles with Calcium Phosphate in the Eyes of the Insect Copium teucrii (Hemiptera: Tingidae) by Javier Garcia-Guinea, Alberto Jorge, Laura Tormo, Marta Furio, Elena Crespo-Feo, Virgilio Correcher, Pedro Prado-Herrero, Ana C. Soria, Jesus Sanz, Jose L. Nieves-Aldrey

    Published 2011-01-01
    “…The chemical composition of both galls and leaves of T. gnaphalodes was determined by gas chromatography – mass spectrometry (GC-MS) of their extracts. …”
    Get full text
    Article
  2. 542

    BTEX Exposure Assessment and Inhalation Health Risks to Traffic Policemen in the Klang Valley Region, Malaysia by Noor Fatihah Mohamad Fandi, Juliana Jalaludin, Mohd Talib Latif, Haris Hafizal Abd Hamid, Mohd Fairus Awang

    Published 2020-06-01
    “…Air samples were collected with low-flow personal samplers during the officers’ work shifts outdoors, and the BTEX content was then analyzed via gas chromatography-mass spectrometry (GC-MS) coupled with thermal desorption (TD). …”
    Get full text
    Article
  3. 543

    FeO–alumina catalyst for reforming waste polyethylene terephthalate (PET) pyrolyzed products: synthesis, characterization, and performance evaluation by Audu, Ephraim Akuaden, Ade-Ajayi, Adebola Femi, Osigbesan, Aisha Ayoola, Gano, Zaharaddeen Sani, Barminas, Jeffrey Tsware

    Published 2024-11-01
    “…Fourier transform infrared analysis of the liquid products inferred peaks corresponding to aromatic and saturated hydrocarbons, which was confirmed by gas chromatography mass spectrometry analysis. Findings from this research demonstrated that the synthesized catalyst was able to reform waste PET pyrolyzed gas into valuable products, addressing environmental challenges and providing alternative energy sources.…”
    Get full text
    Article
  4. 544

    Essential Oils from Citrus Peels Promote Calcium Overload-Induced Calcicoptosis in U251 Cells by Yurong Li, Juanjuan Wei, Zimao Ye, Chen Ji, Wenji Li, Li Xu, Zhiqin Zhou

    Published 2024-12-01
    “…In this study, the chemical compositions of five CPEOs were analyzed via gas chromatography–mass spectrometry (GC-MS). CCK8 assays were used to evaluate the ability of five CPEOs to inhibit U251 human glioblastoma cells, and XLB and RA were selected for further investigation. …”
    Get full text
    Article
  5. 545

    Structural Characterization and Antioxidant Activity in Vivo of Polysaccharides from the Leaves of Hippophae rhamnoides L. by Niannian SONG, Yuxin YI, Xiaoping ZHANG, Bo YANG, Mangsier SAINAWAER, Abuduwaili AYITUXUN

    Published 2025-02-01
    “…The structure of HRLP-2 was identified based on the analysis of liquid chromatography, gas chromatography, UV, infrared spectroscopy, circular dichroism, Congo red experiment, as well as partial acid hydrolysis, periodate oxidation, and Smith degradation methods. …”
    Get full text
    Article
  6. 546

    Comparative Analysis of Effects of Different Raw Materials on Flavour Quality of Scallion Oil Based on HS-SPME-GC-MS by Meng ZHANG, Peng WANG, Jingzhang GENG, Ping ZHAN, Honglei TIAN

    Published 2025-01-01
    “…Quantitative descriptive sensory analysis (QDA) and headspace solid-phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS) techniques were employed to examine and analyse the volatile composition among the samples. …”
    Get full text
    Article
  7. 547

    Antibacterial and Mosquito Repellent Potential of Eight Citrus Cultivars and Their Chemical Composition by Mehwish Nawaz, Bait Ullah, Muhammad Ghazanfar Abbas, Muhammad Binyameen, Violeta Apšegaitė, Raimondas Mozūraitis, Muhammad Azeem

    Published 2024-12-01
    “…The fresh peels of eight citrus cultivars growing in Pakistan were used to extract EOs through steam distillation. Gas chromatography-mass spectrometry (GC-MS) analysis of fresh peel EOs revealed that limonene was the most abundant compound, constituting 94.5%, 96.1%, 95.3%, 93.3%, 56.2%, 91.5%, 96.4%, and 96.7% of <i>Citrus jambhiri</i>, <i>C. aurantium</i>, <i>C. sinensis</i> var. …”
    Get full text
    Article
  8. 548

    Optimization, Characterization, and Antibacterial Activity of Copper Nanoparticles Synthesized Using Senna didymobotrya Root Extract by Bernard Otieno Sadia, Jackson Kiplagat Cherutoi, Cleophas Mecha Achisa

    Published 2021-01-01
    “…Extraction was done by the Soxhlet method using methanol as the solvent. Gas chromatography-mass spectrometry (GC-MS) analysis was performed to identify compounds in S. didymobotrya root extracts. …”
    Get full text
    Article
  9. 549

    Structural Characterization of Foxtail Millet (<i>Setaria italica</i>) Polysaccharides and Evaluation of Its Antioxidant and Immunostimulatory Activities by Haiying Zhang, Chengyu Peng, Wei Zhang, Huatao Liu, Xiaodong Liu, Changqing Sun, Xiaoning Cao

    Published 2025-01-01
    “…The structural characterization results obtained from gas chromatography–mass spectrometer (GC–MS) and nuclear magnetic resonance spectroscopy (NMR) spectra suggest that FM-D1 primarily consists of a main chain linked by →4)-α-D-Glc<i>p</i>-(1→ and minor quantities of →4,6)-α-D-Glc<i>p</i>-(1→ to form the main chain, with branching mainly composed of α-D-Glc<i>p</i>-(1→ attached to the <i>O</i>-6 position of →4,6)-α-D-Glc<i>p</i>-(1→ sugar residues. …”
    Get full text
    Article
  10. 550

    Effect of Cocoa Bean Shell Addition on Metabolite Profile and Antioxidant Activity of Herbal Infusions by Maria Quijano-Avilés, Ivan Chóez-Guaranda, Rafael Viteri, Ana Barragán-Lucas, Daynet Sosa, Patricia Manzano

    Published 2021-01-01
    “…Metabolite profile was analyzed by gas chromatography–mass spectrometry combined with multivariate analysis. …”
    Get full text
    Article
  11. 551

    Serum Fatty Acids and Risk of Cutaneous Melanoma: A Population-Based Case-Control Study by Marco Vinceti, Carlotta Malagoli, Laura Iacuzio, Catherine M. Crespi, Sabina Sieri, Vittorio Krogh, Sandra Marmiroli, Giovanni Pellacani, Elisabetta Venturelli

    Published 2013-01-01
    “…The percentage composition of 12 fatty acids was determined in 51 newly diagnosed melanoma patients and 51 age- and sex-matched population controls by extracting total lipids from serum samples using thin layer and gas chromatography. Conditional logistic regression was used to estimate the relative risk of melanoma associated with tertiles of percentage composition of each fatty acid as well as groupings including saturated, monounsaturated, and polyunsaturated fatty acids. …”
    Get full text
    Article
  12. 552

    Impact of Grape Variety, Yeast and Malolactic Fermentation on Volatile Compounds and Fourier Transform Infrared Spectra in Red Wines by Anna Stój, Tomasz Czernecki, Bożena Sosnowska, Agnieszka Niemczynowicz, Arkadiusz Matwijczuk

    Published 2022-01-01
    “…The volatile compounds were determined by headspace solid-phase microextraction/gas chromatography-mass spectrometry (HS-SPME-GC/MS). Forty-six volatile compounds belonging to alcohols, esters, acids, aldehydes, ketones, furan compounds, sulfur compounds and volatile phenols were identified in the wines. …”
    Get full text
    Article
  13. 553

    Metabolomics Reveals Distinct Metabolites between Lonicera japonica and Lonicera macranthoides Based on GC-MS by Rui-ying Liu, Jing Deng, Xiu-Lian Lin, Ya-mei Li, Yan Lin, Bo-hou Xia, Li-mei Lin

    Published 2020-01-01
    “…However, the in-depth differences of primary metabolites have not thoroughly been studied yet. Therefore, gas chromatography-mass spectrometry- (GC-MS-) based metabolomics method combined with chemometric methods were performed to analyze the distinction in this study. …”
    Get full text
    Article
  14. 554

    Residual, Enrichment and Health Risk Assessment of Hexachlorocyclohexane and Dichlorodiphenyltrichloroethane in Muscle of Cultured Common Carp by Li Huang, Lei Gao, Song Wu, Peng Wang, Zhongxiang Chen, Qirui Hao, Dongli Qin, Xiaoli Huang

    Published 2025-01-01
    “…Due to the proximity of freshwater ponds to agricultural cultivated areas, these aquatic systems are inevitably influenced by the historical application of organochlorine pesticides (OCPs), due to their prolonged half-life and resistance to degradation. Gas chromatography-tandem mass spectrometry (GC-MS/MS) was utilized to quantify the levels of hexachlorocyclohexane (HCHs) and dichlorodiphenyltrichloroethane (DDTs) in the muscle tissue of cultured common carp. …”
    Get full text
    Article
  15. 555

    The Potential of Ethanol Extract of Aleurites Moluccanus Leaves as TNF-α Inhibitor in Oral Incision Wound Care Model by Elfi Zahara, . Darmawi, Ummu Balqis, Cut Soraya

    Published 2024-12-01
    “…The active compounds in the candlenut leaves extract were identified using phytochemical screening, the 2,2-diphenyl-1-picrylhydrazyl (DPPH) assay, gas chromatography-mass spectrometry (GC-MS), and their biological activity was assessed using molecular docking. …”
    Get full text
    Article
  16. 556

    Assessment of Microbiological Indoor Air Quality in Cattle Breeding Farms by Justyna Szulc, Małgorzata Okrasa, Katarzyna Dybka-Stępień, Michael Sulyok, Adriana Nowak, Anna Otlewska, Bogumiła Szponar, Katarzyna Majchrzycka

    Published 2020-04-01
    “…Abstract This study, which was conducted on a farm in central Poland from February till April 2019, aimed to evaluate microbiological threats on cattle breeding premises by counting and identifying the microorganisms (via culturing and high-throughput sequencing), assessing the endotoxin concentrations (via gas chromatography-mass spectrometry [GC-MS]) and analysing the secondary metabolites (including mycotoxins) in the air and sedimented dust (via liquid chromatography-tandem mass spectrometry [LC-MS/MS]) in six barns. …”
    Get full text
    Article
  17. 557

    Seasonal phytochemical study and antimicrobial potential of Vetiveria zizanioides roots by Dos Santos Delair Silveira, Oberger Júlia Vieira, Niero Rivaldo, Wagner Theodoro, Delle Monache Franco, Cruz Alexandre Bella, Martin-Quintal Zhelmy, Cechinel Filho Valdir

    Published 2014-12-01
    “…Considering the high levels of chemical constituents and their biological activity in dichloromethane fraction, the plants were grown in different seasons and the respective dichloromethane fractions were analyzed by gas chromatography-mass spectrometry. The antimicrobial activity was evaluated against several pathogenic microorganisms by determining the minimum inhibitory concentration (MIC) using the agar dilution method. …”
    Get full text
    Article
  18. 558

    Antifungal Activity of Essential Oil Isolated from Pelargonium roseum against Grey Mould (Botrytis cinerea) of Cherry Tomato by Fuyan LIU, Runxia YANG, Yangcuiji ZHENG, Chongjun ZHAO, Liming FAN, Fawu SU, Min YE

    Published 2025-01-01
    “…In this study, the EO of P. roseum was extracted by water vapor distillation, and the chemical components were determined by gas chromatography-mass spectrometry (GC-MS). The inhibitory effects of different concentrations of the EO and its compounds on the growth of mycelium and the germination of spores were determined by the poison food technique and dual culture method, respectively. …”
    Get full text
    Article
  19. 559

    Alkylresorcinols as a New Type of Gut Microbiota Regulators Influencing Immune Therapy Efficiency in Lung Cancer Treatment by Aleksandr V. Shestopalov, Oleg I. Kit, Anastasia A. Zabolotneva, Elena Y. Zlatnik, Aleksey Yu Maksimov, Inna A. Novikova, Alexander B. Sagakyants, Sofya V. Timofeeva, Anna S. Goncharova, Anastasia V. Galina, Svetlana A. Appolonova, Pavel A. Markin, Valentin V. Makarov, Sergey M. Yudin, Anton A. Keskinov, Sergei A. Roumiantsev, Oleg I. Meshkov

    Published 2023-01-01
    “…Quantitative analysis of AR levels, as well as other microbial metabolites in blood serum and faeces, was performed using gas chromatography with mass spectrometric detection; estimation of lymphocyte subsets was performed by flow cytometry; faecal microbiota transplantation (FMT) from lung cancer patients after ICI therapy to germ-free mice was performed to explore whether the intestinal microbiota could produce AR molecules. …”
    Get full text
    Article
  20. 560

    Phenotypic plasticity vs. local genetic adaptation: essential oil diversity of natural immortelle (Helichrysum italicum (Roth.) G.Don) populations along eastern Adriatic coast by Tonka Ninčević Runjić, Dejan Pljevljakušić, Marko Runjić, Martina Grdiša, Martina Grdiša, Zlatko Šatović, Zlatko Šatović

    Published 2025-02-01
    “…Eighteen natural immortelle populations were sampled, hydrodistilled and their essential oil composition determined by gas chromatography-mass spectrometry. A total of 84 compounds were identified. …”
    Get full text
    Article