Showing 321 - 340 results of 1,089 for search '"catalyst"', query time: 0.08s Refine Results
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    Biomathematical enzyme kinetics model of prebiotic autocatalytic RNA networks: degenerating parasite-specific hyperparasite catalysts confer parasite resistance and herald the birth of molecular immunity. by Magnus Pirovino, Christian Iseli, Joseph A Curran, Bernard Conrad

    Published 2025-01-01
    “…Thirdly, with growing sequence divergence of host and parasite catalysts, the probability of self-binding is expected to increase and the trend towards cross-reactivity to diminish. …”
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  4. 324

    Removal of Mercury from Coal-Fired Flue Gas and Its Sulfur Tolerance Characteristics by Mn, Ce Modified γ-Al2O3 Catalyst by Zhong He, Yating Xie, Yuan Wang, Jingjie Xu, Jiangjun Hu

    Published 2020-01-01
    “…The results show that the mercury removal efficiency of the composite catalyst with Mn, Ce, and Al as the active component is higher than that of the single metal catalyst. …”
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    Synthesis of Mannich N-bases based on benzimidazole derivatives using SiO2OAlCl2 catalyst and their potential as antioxidant, antibacterial, and anticancer agents by Antonius Herry Cahyana, Ikrimah Desta, Laely Amaliyah, Aida Nadia, Hilna Diana Sahaya, Dicky Annas, Bayu Ardiansah, Mohammad Jihad Madiabu, Inda Mapiliandari, Kang Hyun Park

    Published 2025-01-01
    “…The synthesis was conducted in two stages, namely the intermediate (benzimidazole derivatives) and the final product (N-mannich base), using five variations of organic acids and SiO2OAlCl2 as catalyst. The results showed that the catalyst was successfully synthesized and characterized by The Fourier transform infrared (FTIR), X-ray diffraction (XRD), and Scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM-EDS). …”
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  7. 327

    Efficient chemical recycling of poly(L-lactic acid) via either alcoholysis to alkyl lactate or thermal depolymerization to L-lactide promoted by Zn(II) catalysts by Maria Gentile, Licia Gaeta, Stefano Brenna, Claudio Pellecchia

    Published 2025-02-01
    “…Here we report two very efficient chemical recycling pathways for commercial high molar mass and highly crystalline PLA samples, both ones promoted by different imidazole[1,5-a]pyrid-3-yl)phenolate Zn(II) catalysts: (i) alcoholysis was easily achieved by simply treating the polymer samples in boiling methanol in the presence of 1 % Zn(II) catalyst, resulting in up to 99 % yield and selectivity in methyl lactate; and (ii) chemical recycling to the monomer was achieved by heating the polymer samples at 180 °C under vacuum or in a nitrogen flow in the presence of 0.1 % Zn(II) catalyst and a highly boiling alcohol, resulting in up to 99 % yield of L-lactide, having high chemical and steric purity, which could be repolymerized without any further purification.…”
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  8. 328

    CWPO mechanism for toxic dye degradation in the presence of Cu@FbHAp catalyst: DFT study, performance analysis, response surface methodology, regeneration, and cost estimation by Youssef Miyah, Mohammed Benjelloun, Fatiha Mejbar, Salma Ssouni, Mohamed El-Habacha, Soulaiman Iaich, Noureddine El Messaoudi, Marouane Zerrouq, Mohammed Souilah, Anissa Lahrichi, Farid Zerrouq

    Published 2025-01-01
    “…Contact of the x%Cu@FbHAp catalyst with hydrogen peroxide promotes free radicals responsible for oxidation rates of 91.5 % and 81.43 % for BG and MeO respectively under the following operating conditions: dye concentration (100 mg/L), catalyst dose (1 g/L), H2O2 concentration (0.049 M), copper content (1 %Cu@FbHAp), temperature (20 °C) and pH (6.8). …”
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    Efficient and Convenient Synthesis of 1,8-Dioxodecahydroacridine Derivatives Using Cu-Doped ZnO Nanocrystalline Powder as a Catalyst under Solvent-Free Conditions by Heshmatollah Alinezhad, Sahar Mohseni Tavakkoli

    Published 2013-01-01
    “…A simple and convenient one-step method for synthesis of acridines and their derivatives from condensation of aromatic aldehydes, cyclic diketones, and aryl amines using Cu-doped ZnO nanocrystalline powder as a catalyst is reported. The present protocol provides several advantages such as good yields, short reaction time, easy workup, and simplicity in operation.…”
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    Dual-Mechanism Study of Metal-Free g-C<sub>3</sub>N<sub>4</sub> Catalysts for Advanced Oxidation Under Non-Photocatalytic Conditions by Zixu Yang, Yang Sun, Weizhi Wang, Xiaohan Yuan, Pengfei Tian, Jing Xu

    Published 2025-01-01
    “…Metal-free materials have been proved to be promising replacements of traditional metal-based catalysts for advanced oxidation reactions. Carbon nitride was found to be able to activate H<sub>2</sub>O<sub>2</sub> and generate hydroxyl radicals (•OH). …”
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  16. 336

    Synthesis of 3,7-Dinitro-1,3,5,7-tetraazabicyclo-[3,3,1]nonane (DPT) Using Task-Specific Ionic Liquids as Recoverable Catalysts by L. I. U. Xiao Bing, L. U. Ming

    Published 2011-01-01
    “…In the procedure some task-specific ionic liquids was synthesized as a cheap and recyclable catalyst for the synthesis of DPT. The catalysts could be recovered and reused several times without noticeably decrease in the catalytic activity.…”
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    Synthesis of NiO/Y2O3/ZrO2 Catalysts Prepared by One-Step Polymerization Method and Their Use in the Syngas Production from Methane by Yvan J. O. Asencios, Elisabete M. Assaf

    Published 2018-01-01
    “…The catalysts were prepared by the one-step polymerization method (OSP) and characterized by different techniques. …”
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  19. 339

    Fe3O4@HA-Cu(OAc)2 nanocomposite as a nanomagnetic water-compatible catalyst for efficient synthesis of 1,2,3-triazoles in water by Beheshteh Arjmandzadeh, Abbas Ali Jafari

    Published 2025-01-01
    “…Abstract A new humic acid-based nanomagnetic copper(II) composite was prepared and used as an eco-friendly recoverable catalyst for synthesizing 1,4-disubstituted 1,2,3-triazoles. …”
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    T3P- A Novel Catalyst for Aza-Diels-Alder Reaction: One-Pot Synthesis of Pyrano[3,2-c]quinolines and furano[3,2-c]quinolines by T. S. R. Prasanna, K. Mohana Raju

    Published 2011-01-01
    “…T3P was found to be an efficient catalyst for the Aza-Diels–Alder reactions of aldimines with dihydropyran or dihydrofuran to afford the corresponding pyrano-and furo [3,2-c]quinolines in high yields with high diastereoselectivity in a short period of time.…”
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