Showing 441 - 460 results of 693 for search '"Gas Chromatography"', query time: 0.06s Refine Results
  1. 441

    Evaluating the occurrence of trihalomethanes in drinking water and their implications for human health risk by Victor Constantin Cojocaru, Valentina Andreea Petre, Ana Ioana Paris, Nicolae Ionut Cristea, Florentina Laura Chiriac, Ioana-Antonia Cimpean

    Published 2024-12-01
    “…This study investigates the THMs presence in various sources across Romania and conducts a human health risk assessment in order to determine the potential danger the population is exposed to. Using a gas-chromatography coupled mass-spectrometry (GC-MS) analysis method, water samples collected over the course of a year were analysed and revealed the cumulative sum of all trihalomethanes (ΣTHMs) saw a maximum concentration of 90.6 µg/L, with an average of 25.6 µg/L and a median of 22.2 µg/L with chloroform and bromoform being the most abundant. …”
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  2. 442

    Antioxidant and Antimicrobial Properties of the Essential Oil and Extracts of Zanthoxylum alatum Grown in North-Western Himalaya by Sanjay Guleria, A. K. Tiku, Apurva Koul, Sahil Gupta, Gurjinder Singh, V. K. Razdan

    Published 2013-01-01
    “…The essential oil obtained from the fresh leaves of Zanthoxylum alatum was analysed by gas chromatography/mass spectrometry (GC/MS). Fourteen components were identified, and linalool (30.58%), 2-decanone (20.85%), β-fenchol (9.43%), 2-tridecanone (8.86%), β-phellandrene (5.99%), Sabinene (4.82%), and α-pinene (4.11%) were the main components. …”
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  3. 443

    Exploring grape juice volatile compounds after inactive yeast extract foliar treatment using SPME and GC–MS by Laís Moro, David Fernando dos Santos, Mara Fernandes Moura Furlan, Armando Reis Tavares, José Luiz Hernandes, Eduardo Purgatto, Marco Antonio Tecchio

    Published 2025-01-01
    “…The volatile profile of the grape juice was determined using headspace solid phase microextraction (SPME) coupled with gas chromatography combined with mass spectrometry (GC–MS). …”
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  4. 444

    Potential of Louhan fish (Amphilophus labiatus) as a local fishery pest in Lake Toba North Sumatra as a source omega 3 and 6 fatty acids by Pandiangan Maruba, Sihombing Dewi Restuana, Daniela Connie, Sibuea Posman, Tampubolon Sanggam Dera Rosa, Sitohang Apul, Sitanggang Lasmianna

    Published 2025-01-01
    “…The results of the gas chromatography study showed that the levels of unsaturated fatty acids were higher than those of saturated fatty acids. …”
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  5. 445

    Association between microplastics and the functionalities of human gut microbiome by Bei Gao, Lixia Chen, Lizhi Wu, Shirui Zhang, Sunan Zhao, Zhe Mo, Zhijian Chen, Pengcheng Tu

    Published 2025-01-01
    “…In the present study, concentrations of microplastics in human blood were detected through pyrolysis-gas chromatography/mass spectrometry in 39 adults. Five types of microplastics were found in human blood, including polyvinyl chloride, polyethylene, polypropylene, polystyrene, and polyamide 66. …”
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  6. 446

    Volatile Organic Compounds of Anchote Tuber and Leaf Extracted Using Simultaneous Steam Distillation and Solvent Extraction by Yenenesh Ayalew, Dargie Tsegay Berhe, Nigusse Retta, Gulelat Desse, Ali Mohammed, Kyong Su Kim

    Published 2022-01-01
    “…Leaf and tuber powders were extracted for the first time to identify volatile organic compounds by simultaneous steam distillation and solvent extraction (SDE) and characterized using gas chromatography mass spectrometry (GC-MS). VOCs having an area percentage above 0.5% were used for identification analysis. …”
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  7. 447

    Health Risk Assessment of Pesticide Residues in Drinking Water of Upper Jhelum Region in Kashmir Valley-India by GC-MS/MS by M. Imran Ganaie, Ishrat Jan, Afshan Nabi Mayer, Alamgir A. Dar, Ishtiaq A. Mayer, Pervez Ahmed, Javid A. Sofi

    Published 2023-01-01
    “…For the analysis, 60 water samples were obtained from different water sources. Gas chromatography coupled with tandem mass spectrometry (GC-MS/MS) was used to determine pesticide residues in water samples. …”
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  8. 448

    Optimization and characterization of bioactive secondary metabolites from Streptomyces sp CMSTAAHL-4 isolated from mangrove sediment by Selvaraj Jeraldin Nisha, Ganapathi Uma, Ramamoorthy Sathishkumar, Vincent Samuel Gnana Prakash, Rimal Isaac, Thavasimuthu Citarasu

    Published 2025-01-01
    “…Alcohols, alkenes, alkynes, alkyl halides, carboxylic acids, aliphatic esters functional groups were identified by fourier transform infrared spectroscopy, gas chromatography and mass spectrometer analysis of the secondary metabolites revealed five bioactive compounds. …”
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  9. 449

    Transcriptomic analysis of molecular mechanisms underlying the biodegradation of organophosphorus pesticide chlorpyrifos by Lactobacillus delbrueckii ssp. bulgaricus in skimmed mil... by Yue Yang, Wenxia Zhou, Lingyu Yang, Yilun Chen, Dongxiao Sun-Waterhouse, Dapeng Li

    Published 2024-09-01
    “…This study aimed to help fill this knowledge gap and examined the degradation mechanism of organophosphorus pesticide, chlorpyrifos, in milk by Lactobacillus delbrueckii ssp. bulgaricus using gas chromatography-tandem mass spectrometry (GC-MS/MS) combined with transcriptome analysis. …”
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  10. 450

    Phytochemical Profiling, Bioactivity, and Insecticidal Effectiveness of <i>Mammea americana</i> L. Leaf Extracts Against <i>Ferrisia</i> sp. by Mike Vázquez-Torres, Nilka Rivera-Portalatín, Irma Cabrera-Asencio

    Published 2024-12-01
    “…Micro-Soxhlet extraction with chloroform, dichloromethane, and methanol was used, and key phytochemicals were identified via Gas Chromatography-Mass Spectrometry (GC-MS). The extracts were mainly composed of sesquiterpenes, carboxylic acids, coumarins, esters, diterpenes, and other bioactive compounds. …”
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  11. 451

    Apolar Compounds in Seaweeds from Fernando de Noronha Archipelago (Northeastern Coast of Brazil) by Leandro De Santis Ferreira, Izabel Cristina Casanova Turatti, Norberto Peporine Lopes, Thais Guaratini, Pio Colepicolo, Eurico Cabral Oliveira Filho, Ricardo Clapis Garla

    Published 2012-01-01
    “…Hyphenated techniques of gas chromatography coupled to mass spectrometer were used to determine fatty acids in eleven species of seaweeds from Fernando de Noronha archipelago. …”
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  12. 452

    Effect of Sun-exposure before Moisture-yellowing on the Aroma of Yellow Tea by Xinying CHEN, Junran QI, Lixia ZHANG

    Published 2025-01-01
    “…The tea samples were analyzed by the sensory evaluation and headspace solid-phase microextraction-gas chromatography-mass spectrometry (HS-SPME-GC-MS) methods. …”
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  13. 453

    Fusarium oxysporum & Fusarium solani: Identification, Characterization, and Differentiation the Fungal Phenolic Profiles by HPLC and the Fungal Lipid Profiles by GC-MS by Nashwa M. Shalapy, Wenyi Kang

    Published 2022-01-01
    “…Moreover, lipid criteria of Fusarium oxysporum and Fusarium solani extracts had been displayed by gas chromatography-mass spectrometry (GC-MS) and their fatty acids had been identified to define the prolific species of the most biological and valuable fatty acids. …”
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  14. 454

    Discovery of Antimalarial Drugs from Streptomycetes Metabolites Using a Metabolomic Approach by Siti Junaidah Ahmad, Mohd Badrin Hanizam Abdul Rahim, Syarul Nataqain Baharum, Mohd Shukri Baba, Noraziah Mohamad Zin

    Published 2017-01-01
    “…The highly sensitive instruments, such as Liquid Chromatography-Mass Spectrophotometry (LC-MS), Gas Chromatography-Mass Spectrophotometry (GC-MS), and Nuclear Magnetic Resonance (1H-NMR) spectroscopy, provide a wide range of information in the identification of potentially bioactive compounds. …”
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  15. 455

    Detection of Bioactive Compounds Produced by in Vitro Culture of Jojoba Plants (Simmondsia chinesi (Link) Schn.) Using GCMS and FTIR by Aman H. A. Althuluth, Aqeel A. Suhaim, Murtadha S. Auda

    Published 2024-12-01
    “…The quality of the formed callus and the most important secondary compounds were analyzed using Gas chromatography–mass spectrometry (GC–MS)and Fourier-transform infrared spectroscopy (FTIR).The MS media(murashige and skoog) supplemented with 1 mg L-1 NAA + 2.5 mg L-1 TDZ and 2 mg L-1 NAA + 5 mg L-1 TDZ was most effective for callus formation, with the short period of time and the highest percentages of callus formation and fresh weight.GC-MS analysis identified various active compounds in the jojoba plant callus. …”
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  16. 456

    Characterisation of Selected Emulsion Phase Parameters in Milk, Cream and Buttermilk by Oskar Michał Brożek, Katarzyna Kiełczewska, Krzysztof Bohdziewicz

    Published 2021-12-01
    “…The size of milk fat globules was measured by the laser diffraction method; the fatty acid profile of milk fat was determined by gas chromatography; and the thermal properties of freeze-dried samples were determined by differential scanning calorimetry. …”
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  17. 457

    Prediction of COD Degradation in Fenton Oxidation Treatment of Kitchen Anaerobic Wastewater Based on IPSO-BP Neural Network by Tianpeng Zhang, Pengfei Ji, Dayong Tian, Rui Xu

    Published 2025-01-01
    “…The optimal conditions for Fenton oxidation obtained from IPSO-BP model are as follows: the dosage of H2O2 is 2000 mg/L, the dosage of Fe2+ is 1200 mg/L, the pH value is 2.8, the reaction time is 75 min, and the COD removal rate is 80.125%, which is consistent with the experimental results. Through gas chromatography-mass spectrometry (GC-MS) analysis, most organic compounds in kitchen anaerobic wastewater are oxidized and decomposed, indicating that the IPSO-BP model has good predictive quality.…”
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  18. 458

    Chemical Composition and Cytotoxic and Antioxidant Activities of Satureja montana L. Essential Oil and Its Antibacterial Potential against Salmonella Spp. Strains by Hanene Miladi, Rihab Ben Slama, Donia Mili, Sami Zouari, Amina Bakhrouf, Emna Ammar

    Published 2013-01-01
    “…The plant was collected from south France mountain, and its EO was extracted by hydrodistillation (HD) and analysed by gas chromatography/mass spectrometry (GC/MS). Thirty-two compounds were identified accounting for 99.85% of the total oil, where oxygenated monoterpenes constituted the main chemical class (59.11%). …”
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  19. 459

    Valorization of Food Waste to Produce Eco-Friendly Means of Corrosion Protection and “Green” Synthesis of Nanoparticles by Georgii Vasyliev, Victoria Vorobyova

    Published 2020-01-01
    “…The waste extracts for corrosion and scale inhibitors of mild steel in tap water were prepared by the conventional extraction method that uses 2-propanol and characterized by gas chromatography-mass spectroscopy (GC-MS). Inhibition of scaling and corrosion was investigated in thermal scaling conditions on the surface of the electrode manufactured from mild steel. …”
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  20. 460

    Phytochemical Constituents and Antioxidant Activity of Sweet Basil (Ocimum basilicum L.) Essential Oil on Ground Beef from Boran and Nguni Cattle by Andrew Bamidele Falowo, Felicitas Esnart Mukumbo, Emrobowansan Monday Idamokoro, Anthony Jide Afolayan, Voster Muchenje

    Published 2019-01-01
    “…The phytoconstituents of SBEO were analyzed by gas chromatography mass spectrometry. Thereafter, minced beef samples from Nguni and Boran cattle were treated with either no additives (control, C) or SBEO added at 2% (SB2), 4% (SB4), or 6% (SB6). …”
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