Showing 441 - 460 results of 14,114 for search '"chemical"', query time: 0.08s Refine Results
  1. 441

    On General Sum-Connectivity Index and Number of Segments of Fixed-Order Chemical Trees by Muzamil Hanif, Akhlaq A. Bhatti, Hicham Saber, Adel A. Attiya, Akbar Ali

    Published 2025-01-01
    “…The primary objective of the current study is to find the largest value of χα of graphs in the class of all fixed-order chemical trees with a particular number of segments for α>1, where χα is the general sum-connectivity index, which is a molecular descriptor introduced about one and a half decades ago. …”
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  2. 442

    Physico-chemical properties and structure of rice cultivars grown in Heilongjiang Province of China by Yinyuan He, Fenglian Chen, Yanguo Shi, Zhexian Guan, Na Zhang, Osvaldo H. Campanella

    Published 2021-01-01
    “…The relationships between chemical composition, structure and physicochemical properties such as pasting, thermal, and textural properties of 12 temperate rice cultivars grown in Heilongjiang Province, China were investigated in this study. …”
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  3. 443

    Preliminary research: Identification of Difficulty in Chemical Learning Based On Teacher and Student Perspectives by Risvayani Risvayani, A Permanasari, I Musthafa

    Published 2023-11-01
    Subjects: “…preliminary reasearch, chemical literacy, learning chemichal…”
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  4. 444

    Chemical profiling, antioxidant, and antimicrobial activities of the essential oil of Matricaria recutita (Chamomile) by Ram Prasad Baral, Rameshwar Adhikari, Achyut Adhikari

    Published 2025-01-01
    “…This research focuses on extracting essential oil through hydro-distillation, followed by Gas Chromatography-Mass Spectroscopy (GC-MS) to identify its chemical constituents and antioxidant and antimicrobial activities against bacteria and fungi responsible for common skin infections. …”
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  5. 445
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  8. 448

    Do we know the chemical bond? A case for the ethical teaching of undefined paradigms by Kozuch Sebastian

    Published 2024-12-01
    Subjects: “…ethics in chemical education…”
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  9. 449
  10. 450

    CHEMICAL COMPOSITION AND AMINO ACID PROFILE OF FRESH AND STEAMED COBIA (Rachycentron canadum L.) by Nurjanah Nurjanah, Ruddy Suwandi, Taufik Hidayat, Vini Oktorina

    Published 2020-07-01
    “…The purposes of this research were to determine the effect of steaming process on proximate and amino acids composition. The chemical composition of fresh and steamed cobia’s meat were determined by proximate analysis. …”
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  11. 451

    Chemical, Biochemical, and Microbiological Properties of Soils from Abandoned and Extensively Cultivated Olive Orchards by A. M. Palese, R. Magno, T. Casacchia, M. Curci, S. Baronti, F. Miglietta, C. Crecchio, C. Xiloyannis, A. Sofo

    Published 2013-01-01
    “…The aim of this study was to investigate some chemical, biochemical, and microbiological properties in a soil of a southern olive grove abandoned for 25 years. …”
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  12. 452
  13. 453

    Chemical Constituents, Antioxidant Activities, and Element Concentrations of Rusa Deer Velvet Antler Extracts by Chutima Limmatvapirat, Potcharet Rodhetbhai, Krittaphas Somsakraksanti, Pitcha Danpongprasert, Soranun Poonsub, Wantanwa Krongrawa, Sontaya Limmatvapirat, Maneerat Meepan

    Published 2020-01-01
    “…The objective of this study was to analyze hexane extract (HE), 75% v/v ethanol extract (EE), and water extract (WE) of rusa deer velvet antlers, obtained through a three-solvent sequential extraction, for determining their chemical constituents, antioxidant activities, element concentrations, and microbial contamination. …”
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  14. 454
  15. 455

    Modification of Nafion Membranes by IL-Cation Exchange: Chemical Surface, Electrical and Interfacial Study by V. Romero, M. V. Martínez de Yuso, A. Arango, E. Rodríguez-Castellón, J. Benavente

    Published 2012-01-01
    “…Only slight differences were obtained in the incorporation degree and surface chemical nature depending on the membrane thickness, and DTA+ incorporation modified both the hydrophobic character of the original Nafion membranes and their thermal stability. …”
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  16. 456

    Teaching-Learning-Based Optimization with Learning Enthusiasm Mechanism and Its Application in Chemical Engineering by Xu Chen, Bin Xu, Kunjie Yu, Wenli Du

    Published 2018-01-01
    “…Finally, LebTLBO is applied to solve three optimal control problems in chemical engineering, and the competitive results show its potential for real-world problems.…”
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  17. 457

    Evaluating chemical venous thromboembolism prophylaxis in trauma patients at a single Australian center by Natalie Quarmby, Minh Tu Vo, Sean Weng Chan

    Published 2024-09-01
    “…This study aimed to assess the effectiveness of the current practice of chemical VTE prophylaxis in trauma patients at a single Australian center. …”
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  18. 458

    Chemical Control for Host-Parasitoid Model within the Parasitism Season and Its Complex Dynamics by Tao Wang, Youtang Zhang

    Published 2016-01-01
    “…The present research can help us to further understand the importance of timings of pesticide application in the pest control and to improve the classical chemical control and to make management decisions.…”
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  20. 460

    The Physical and Chemical Properties of Fine Carbon Particles-Pinewood Resin Blends and Their Possible Utilization by Aviwe Melapi, Sampson N. Mamphweli, David M. Katwire, Edson L. Meyer

    Published 2015-01-01
    “…Three samples of the gasification by-products were obtained from a downdraft biomass gasifier system and were characterized in terms of chemical and physical properties. FTIR analysis confirmed similar spectra in all char-resin blends. …”
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