Showing 661 - 680 results of 1,089 for search '"catalyst"', query time: 0.05s Refine Results
  1. 661

    Green Synthesis Characterization and Thermotropic Behaviour of O-Linked Glycopyranosides of Phenolic Esters by Saliha Nazir, Dure Najaf Iqbal, Hina Daud, Ambreen Ghani, Shagufta Nasir, Saima Naz, Erum Akbar Hussain

    Published 2020-01-01
    “…Focusing on green chemistry protocols, a series of carbohydrate derivatives (5a–l) have been synthesized by Fischer glycosylation of α-D-glucose, D-xylose, and α-maltose with several nonpolar phenolic ester aglycones (3a–d) derived from menthol by employing solid-supported Si-H+ as the catalyst. In order to study the extent of mesomorphism in target molecules, the thermotropic behaviour has been studied by using the thermoanalytic DSC/TGA technique and polarized optical microscope. …”
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  2. 662

    Effect of Different Calcination Temperatures on the Structural and Photocatalytic Performance of Bi-TiO2/SBA-15 by Jing Ma, Jia Chu, Liangsheng Qiang, Juanqin Xue

    Published 2013-01-01
    “…The sample calcined at 550°C shows the highest photocatalytic activity in the decomposition of RhB under visible light. The catalyst preserved almost its initial photocatalytic activity after six reuses.…”
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  3. 663

    Branched PLGA derivatives with tailored drug delivery properties by Snejdrova Eva, Podzimek Stepan, Martiska Juraj, Holas Ondrej, Dittrich Milan

    Published 2020-03-01
    “…A series of poly(lactic-co-glycolic acid) derivatives with lower molar mass and star or comb architecture were synthesized by a simple, catalyst free, direct melt polycondensation method not requiring purification of the obtained sterile product by precipitation. …”
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  4. 664

    Photocatalytic Degradation of Phenol Using Immobilized TiO2 Nanotube Photocatalysts by Chung Leng Wong, Yong Nian Tan, Abdul Rahman Mohamed

    Published 2011-01-01
    “…Decreasing the initial phenol concentration led to an increase in phenol degradation efficiency due to more hydroxyl radicals being presented on the catalyst surface. Immobilized TiO2 nanotubes showed higher photocatalytic activity than that of the pure TiO2 which only achieved 87% degradation. …”
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  5. 665

    Multiwall Carbon Nanotube Coated with Conducting Polyaniline Nanocomposites for Quasi-Solid-State Dye-Sensitized Solar Cells by Mohammad Rezaul Karim, Ashraful Islam, M. D. Akhtaruzzaman, Liyuan Han, Abdurahman Al-Ahmari

    Published 2013-01-01
    “…The MWNT-PAni nanoparticles exploited as the extended electron transfer materials, which can reduce charge diffusion length and serve simultaneously as catalyst for the electrochemical reduction of I3-. …”
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  6. 666

    SOCIAL ECONOMIC CHANGE AS A PRECONDITION OF ETHNIC CONFLICTS: THE CASES OF OSH CONFLICTS IN 1990 AND 2010 by K. Hyunjung

    Published 2017-11-01
    “…This article demonstrates that ethnicity itself didn’t play a significant role to cause conflicts in Osh in 1990 and 2010, but was rather a side effect or a catalyst produced inevitably by political struggle in the country. …”
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  7. 667

    Influence of RANEY Nickel on the Formation of Intermediates in the Degradation of Lignin by Daniel Forchheim, Ursel Hornung, Philipp Kempe, Andrea Kruse, David Steinbach

    Published 2012-01-01
    “…RANEY Nickel was found to be an adequate catalyst for hydrodeoxygenation. Although it does not influence the cleavage of ether bonds, RANEY Nickel favours the production of phenol from both lignin and catechol. …”
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  8. 668

    Conducive conditions for curriculum practice in teaching accounting at a rural school in the KwaZulu-Natal by Walusa Ajuma, Molaodi Tshelane

    Published 2024-12-01
    “…This overview serves as a guide for promising practices and a catalyst for further research on optimising accounting education in a rapidly changing economic landscape.…”
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  9. 669

    Effect of Rotating Magnetic Field on Hydrogen Production from Electrolytic Water by Hao Guo, Sangyoung Kim

    Published 2022-01-01
    “…When dilute sulfuric acid electrolyte is selected in the experiment, the concentration should be 0.1%–0.2%; After the proton exchange membrane enters the stable period after the activation period, with the increase of the electrolysis time of tap water, (24 h) the membrane electrode will weaken the catalyst activity and reduce the electrolysis efficiency in the electrolysis process. …”
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  10. 670

    Microwave-Assisted Regioselective Synthesis and 2D-NMR Studies of New 1,2,3-Triazole Compounds Derived from Acridone by Mohammed Aarjane, Siham Slassi, Bouchra Tazi, Amina Amine

    Published 2021-01-01
    “…A simple and mild protocol towards the synthesis of new 1,2,3-triazole compounds derived from acridone has been developed via regiospecific 1,3-dipolar cycloaddition reaction between 10-(prop-2-yn-1-yl)acridone derivatives and aromatic azides using CuI as a catalyst. The cycloaddition reaction has been performed using conventional as well as microwave-assisted methods. …”
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  11. 671

    Fabrication of Microfibre-nanowire Junction Arrays of ZnO/SnO2 Composite by the Carbothermal Evaporation Method by Roghayeh Imani, Meysam Pazoki, Gerrit Boschloo, Aleš Iglic

    Published 2014-07-01
    “…A cotton-like ZnO/SnO2 nanocomposite was grown by the carbothermal evaporation of a mixture of ZnO and SnO2 powders at 1100oC by the vapour-liquid- solid process, in which the Sn particles produced by the reduction of SnO2 act as the catalyst. Field-emission scanning electron microscope images suggest that the composites are made of microfibre-nanowire junction arrays. …”
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  12. 672

    Sintesis dan Karakterisasi Katalis Bentonit Termodifikasi TiO2 dan Terinpregnasi Logam Ni by Mohamad Mirzan, Nining Austi Duda, Khairuddin, Nurakhirawati, Ruslan

    Published 2024-12-01
    “…TiO2-modified and Ni-impregnated bentonite catalysts have been synthesized and characterized to determine their physicochemical properties. …”
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  13. 673

    Green Synthesis of New Pyrrolo [1,2-a] quinoxalines as Antiproliferative Agents in GPER-expressing Breast Cancer Cells by Gabriele Carullo, Sarah Mazzotta, Francesca Giordano, Francesca Aiello

    Published 2021-01-01
    “…The synthesis of the pyrroloquinoxalinic core was employed following the Pictet–Spengler reaction, using the surfactant p-dodecylbenzene sulphonic acid (p-DBSA), as catalyst. It demonstrated efficiency in the catalysis of the 4-phenylpyrrole [1,2-a] quinoxaline type compound formation in mild solvents such as water, ethanol, and hydroalcoholic solutions. …”
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  14. 674

    Preparation of TiO2 Grafted on Graphene and Study on their Photocatalytic Properties by Longli Lin, Lihua Shi, Simei Liu, Jieyi He

    Published 2023-01-01
    “…In view of this, P25 TiO2 and graphene were taken as raw materials to prepare the modified TiO2 catalyst. The modification mechanism of TiO2 was explained by characterizing the phase composition, microscopic morphology, and functional groups and analyzing the specific surface area and particle size. …”
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  15. 675

    Polyaniline Supported Ag-Doped ZnO Nanocomposite: Synthesis, Characterization, and Kinetics Study for Photocatalytic Degradation of Malachite Green by Fikradis Habtamu, Sintayehu Berhanu, Teshome Mender

    Published 2021-01-01
    “…Moreover, the photocatalytic activity of Ag-ZnO/PANI nanocomposites was evaluated and compared with Ce-Cd oxide, electrospun P(3HB)-TiO2, and with other catalysts in the literature. The optimal conditions for photocatalytic degradation are as follows: the concentration of malachite green (0.2 g/l), pH (8), and the concentration of catalyst load (0.2 g/l) under visible light with an irradiation time of 120 min.…”
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  16. 676

    Process Optimization of Biodiesel Production Using the Laplacian Harris Hawk Optimization (LHHO) Algorithm by Ashutosh Sharma, Akash Saxena, Shail Kumar Dinkar, Rajesh Kumar, Ameena Saad Al-Sumaiti

    Published 2022-01-01
    “…An optimization routine is formulated in the form of a single-objective function with a temperature, methanol to oil ratio, and catalyst concentration as the optimization variables. …”
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  17. 677

    Conversion of Lignocellulosic Biomass to Nanocellulose: Structure and Chemical Process by H. V. Lee, S. B. A. Hamid, S. K. Zain

    Published 2014-01-01
    “…Furthermore, review on catalyst design to overcome key barriers regarding the natural resistance of biomass will be presented herein.…”
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  18. 678

    Effect of Activation Energy on Magnetized Couple Stress Fluid over an Inclined Stretching Permeable Cylinder by Suman Sharma, Shalini Jain

    Published 2025-05-01
    “…Activation energy is of considerable significance in diverse applications such as chemical kinetics, catalyst development, enzymes, semiconductors, and systems sensitive to temperature, such as chemical reactors and engines. …”
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  19. 679

    Biocatalytic enantioselective formation and ring-opening of oxetanes by Xia Hua, Yuan-Fei Wang, Xiao Jin, Hong-Yin Yu, Hui-Hui Wang, Yong-Zheng Chen, Nan-Wei Wan

    Published 2025-01-01
    “…Additionally, both the enantioselective oxetane formation and ring-opening processes are proven scalable for large-scale transformations at high substrate concentrations, and can be integrated efficiently in a one-pot, one-catalyst cascade system. This work expands the enzymatic toolbox for non-natural reactions and will promote further exploration of the catalytic repertoire of halohydrin dehalogenases in synthetic and pharmaceutical chemistry.…”
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  20. 680

    Diffusion rate determines balance between extinction and proliferationin birth-death processes by Hilla Behar, Alexandra Agranovich, Yoram Louzoun

    Published 2013-03-01
    “…We here study spatially extended catalyst induced growth processes.This type of process exists in multiple domains of biology, rangingfrom ecology (nutrients and growth), through immunology (antigensand lymphocytes) to molecular biology (signaling molecules initiatingsignaling cascades). …”
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