Showing 301 - 320 results of 562 for search '"Gas Chromatography"', query time: 0.07s Refine Results
  1. 301

    Chemical Composition, Total Phenolic Content, and Antioxidant Activities of the Essential Oils of the Leaves and Fruit Pulp of Annona muricata L. (Soursop) from Ghana by Joseph Nana Gyesi, Rita Opoku, Lawrence Sheringham Borquaye

    Published 2019-01-01
    “…Essential oils were obtained via hydrodistillation and characterized by gas chromatography-mass spectrometry. Antioxidant potential was evaluated via the phosphomolybdenum, hydrogen peroxide scavenging, and 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging assays. …”
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  2. 302

    The Pear Aroma in the Austrian Pinot Blanc Wine Variety: Evaluation by Means of Sensorial-Analytical-Typograms with regard to Vintage, Wine Styles, and Origin of Wines by Christian Philipp, Phillip Eder, Walter Brandes, Elsa Patzl-Fischerleitner, Reinhard Eder

    Published 2018-01-01
    “…In this study, a valid stable isotope dilution assay headspace solid-phase microextraction gas chromatography mass spectroscopy (SIDA-HS-SPME-GC-MS) method was developed for the analysis of these compounds, and 102 Austrian Pinot blanc wines of vintages 2013–2016 were analysed. …”
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  3. 303

    Antioxidative Activity and Volatile Profiles of Maillard Reaction Products between Giant Salamander (Andrias davidianus) Peptides and Glucose during the Heating Process by Wenqian Wang, Shibo Zhao, Jinjin Pei, Pengfei Jiang, Wengang Jin, Ruichang Gao

    Published 2023-01-01
    “…The difference in volatile compounds of the MRPs was also analyzed by gas chromatography-ion mobility spectroscopy. The results indicated that the pH value of the MRPs shrank with the proceeding of heating time, while the browning extent and antioxidative capacity increased. 58 volatile compounds including 24 aldehydes, 12 alcohols, 8 esters, 5 ketones, 4 pyrazines, 2 furans, 1 pyridine, 1 ether, and 1 olefin were detected among the MRPs. …”
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  4. 304

    Distribution and Health Risk Assessment on Dietary Exposure of Polycyclic Aromatic Hydrocarbons in Vegetables in Nanjing, China by Minmin Wu, Zhonghuan Xia, Qianqian Zhang, Jing Yin, Yanchi Zhou, Hao Yang

    Published 2016-01-01
    “…In a market basket study made in Nanjing, China, in which the most common consumed nine kinds of vegetables foodstuffs were sampled, the contents of 16 polycyclic aromatic hydrocarbons (PAHs) were analyzed using gas chromatography with mass spectrometer detector (GC-MS). …”
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  5. 305

    Effect of Benzothiadiazole Treatment during Veraison on Amino Acid Composition, Degradation and Metabolism in ‘Chardonnay’ Grape by GUAN Ruwen, CHEN Chunxia, ZHANG Yu, HAN Yuqi, WANG Jianfeng, WANG Feifei, WANG Huijun, WANG Bo, JIANG Yumei

    Published 2025-01-01
    “…The contents of glucose, fructose, sucrose, organic acids and amino acids, as well as enzyme activities related to amino acid degradation and metabolism and the resulting aroma products were analyzed by high performance liquid chromatography (HPLC), an automatic amino acid analyzer and solid phase microextraction combined with gas chromatography-mass spectrometry (SPME-GC-MS). The results showed that glutamic acid, arginine and proline were the major amino acids in ‘Chardonnay’ grape. …”
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  6. 306

    Phytotoxicity and Benzoxazinone Concentration in Field Grown Cereal Rye (Secale cereale L.) by C. La Hovary, D. A. Danehower, G. Ma, C. Reberg-Horton, J. D. Williamson, S. R. Baerson, J. D. Burton

    Published 2016-01-01
    “…In addition, BX (DIBOA, DIBOA-glycoside, and BOA) levels were directly determined using gas chromatography. Results showed that rye tissue harvested in March was the most toxic to indicator species, with toxicity decreasing thereafter. …”
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  7. 307

    Bioinsecticide Production from Cigarette Wastes by Badhane Gudeta, Solomon K, M. Venkata Ratnam

    Published 2021-01-01
    “…The extracted product was evaluated using a gas chromatography–mass spectrometry (GC-MS) and a UV/visible spectrophotometer. …”
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  8. 308

    GC-MS Analysis of Bioactive Compounds in Methanolic Extracts of Papaver decaisnei and Determination of Its Antioxidants and Anticancer Activities by Ahmed Aj. Jabbar, Fuad O. Abdullah, Kamaran K. Abdulrahman, Yaseen Galali, Abdullah Sh. Sardar

    Published 2022-01-01
    “…The current study investigates the methanol (99.9%) extracts (10 μg/mL) of roots, leaves, and flowers of Papaver decaisnei in terms of phytochemistry by gas chromatography-mass spectrophotometry GC-MS, in vitro antioxidant activity by radical scavenging and reducing power assays, and finally, the anticancer actions as IC50 (inhibitory concentration at 50%) against human colorectal adenocarcinoma (Caco-2), mammary cancer cells (MCF-7), and human cervical carcinoma (HeLa) cells. …”
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  9. 309

    Physiological value of intestinal microflora by S. Yu. Kuchumova, Ye. A. Poluektova, A. A. Sheptulin, V. T. Ivashkin

    Published 2011-09-01
    “…In the last years in clinical practice chemical methods, in particular gas chromatography (GC) in combination to mass spectrometry (GC-MS) are actively developed, the method of fluorescent DNA hybridization in situ (FISH) is applied, polymerase chain reaction (PCR-diagnostics) became quite widespread method of microorganisms assessment. …”
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  10. 310

    Chemical Composition of Liquid Smoke from Mangrove Leaves: Potential Aphrodisiac Effects and Implications for Coastal Ecosystem Sustainability by Ratnani Rita D., Mulangsri Dewi A. K., Muhyi Ahmad, Meilani Dwi, Muhaimin Wahid, Arifan Fahmi, Steven Soen, Arianti Forita D.

    Published 2025-01-01
    “…The liquid smoke production process involved pyrolysis at various temperatures to determine the optimal conditions for extracting bioactive compounds. Gas Chromatography-Mass Spectrometry (GC-MS) analysis revealed that the liquid smoke dominantly consists of phenolic compounds, organic acids, and esters, potentially contributing to aphrodisiac effects. …”
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  11. 311

    Investigating the impact of dioxins, furans, and coplanar polychlorinated biphenyls on mortality, inflammatory states, and chronic diseases: An integrative epidemiological analysis by Jiaxing Tan, Ying Gao, Yuanlin Xia, Peiyan Sun, Wei Qin

    Published 2025-01-01
    “…Exposure was quantified in serum through high-resolution gas chromatography and isotope-dilution high-resolution mass spectrometry. …”
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  12. 312

    Chemical Characterization of Specific Micropollutants from Textile Industry Effluents in Fez City, Morocco by Hakima Talouizte, Mohammed Merzouki, Mohammed Benlemlih, Mohammed Bendriss Amraoui

    Published 2020-01-01
    “…In this work, characterization of toxic organic compounds is proposed. Based on gas chromatography coupled to mass spectrometry (GC/MS) screening analysis, organic micropollutant diversity of textile effluents from a local textile processing factory was investigated. …”
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  13. 313

    Study of Component Composition and Antimicrobial Activity of the Ophthalmic Emulsion Based on the Safflower Flowers (Carthamus tinctorius L.) by Zhanar Abuova, Aknur Turgumbayeva, Ardak Jumagaziyeva, Kairolla Rakhimov, Aigul Jussupkaliyeva

    Published 2022-01-01
    “…The component composition was determined using gas chromatography with the Agilent 7890A/5975C mass spectrometry technique. …”
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  14. 314

    Effects of enhanced fermentation with high-yielding strains of Tetramethylpyrazine on flavor quality of Douchiba by Panpan Yang, Qin Wang, Yurou Yang, Anyan Wen, Haiying Zeng, Na Liu, Likang Qin

    Published 2025-01-01
    “…Furthermore, the concentrations of taste substances, organic acids, free amino acids, and free fatty acids in MG were significantly increased. 87 flavor compounds were detected by gas chromatography-ion mobility spectrometry. The content of aldehydes, alcohols, esters, acids, and pyrazines flavor compounds was higher in MG, with esters and alcohols being notably higher than in other groups. …”
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  15. 315

    Development and validation of an analytical method for detecting chlorantraniliprole residues in fresh tea leaves by Tengfei Liu, Minghui Dong, Fengjie Zhou, Daifeng Yang, Xueming Zhang

    Published 2019-12-01
    “…Keywords: Multiwalled carbon nanotubes, Fresh tea leaves, Chlorantraniliprole, Dispersive solid-phase extraction, Gas chromatography…”
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  16. 316

    Converting Organic Municipal Solid Waste Into Volatile Fatty Acids and Biogas: Experimental Pilot and Batch Studies With Statistical Analysis by Hojjat Borhany

    Published 2025-02-01
    “…MethodsVFA concentration, VFA weight ratio distribution, and biogas yield were quantified by gas chromatography. A t ResultsBoth HRTs were identical concerning the ratio of VFA/soluble chemical oxygen demand (0.88 kg/kg) and VFA weight ratio distribution: mainly, acetic acid (40%), butyric acid (24%), and caproic acid (17%). …”
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  17. 317

    Electrochemical conversion of methane measured by anode out gas monitoring over Ce–Co–Cu anode electrocatalysts by Bernardo Jordão Moreira Sarruf, Robert Steinberger-Wilckens, Paulo Emílio Valadão de Miranda

    Published 2025-01-01
    “…Comparative analysis of three cell types, each with varying amounts of ceria, cobalt, and copper in their anode compositions, was conducted. Gas chromatography was employed to monitor anode effluent gases under electrochemical conditions, complemented by electrochemical impedance assessments using hydrogen as the fuel to identify polarisation sources within these innovative anode configurations. …”
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    Article
  18. 318

    Enhancement of Physical Appearance, Skin Permeation, and Odor Reduction Using Liposome of Hydrolyzed Salmon Collagen for Cosmetic Products by Thanaporn Amnuaikit, Rajeev Shankar Rajagopal, Krisana Nilsuwan, Soottawat Benjakul

    Published 2024-01-01
    “…Skin permeation and odor detection of the HC-VitB3 liposome were studied using Franz’s diffusion cell and gas chromatography, respectively, and compared with HC-VitB3 solution. …”
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  19. 319

    A straightforward Py-GC/MS methodology for quantification of microplastics in tap water by Alexander Ccanccapa-Cartagena, Anandu Nair Gopakumar, Maryam Salehi

    Published 2025-06-01
    “…This study introduces a cost-effective and streamlined Pyrolysis Gas Chromatography-Mass Spectrometry (Py-GC/MS) methodology for detecting and quantifying microplastics in tap water, focusing on seven common polymers. …”
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  20. 320

    Chemical Compounds of Malacca Leaf (Phyllanthus emblica) after Triple Extraction with N-Hexane, Ethyl Acetate, and Ethanol by Nuzul Asmilia, Yudha Fahrimal, Mahdi Abrar, Rinidar Rinidar

    Published 2020-01-01
    “…This research was conducted to analyze the content of chemical compounds in the ethanol extract of the Malacca leaf (EEDM) using a gas chromatography-mass spectrophotometer (GC-MS). Malacca leaves were extracted by the maceration method using n-hexane, ethyl acetate, and ethanol. …”
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