Showing 1 - 20 results of 91 for search '"Chemical bond"', query time: 0.06s Refine Results
  1. 1

    Surface Properties of Silicas with Chemically Bonded Polyfluoroalkyl Groups by K.B. Gurevich, T.M. Roshchina, N.K. Shonia, L.M. Kustov, A.V. Ivanov

    Published 2001-05-01
    “…Adsorption isotherms of hexane and benzene were measured on silicas with chemically bonded polyfluoroalkyl groups and the thermodynamic characteristics of the adsorption of n-alkanes, benzene and alkylbenzenes on the same materials studied at zero coverage by gas chromatography (GC). …”
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  2. 2

    Adsorption Properties of Silica with Chemically Bonded Amino and Guanidino Groups by T.M. Roshchina, V.Ya. Davydov, N.M. Khrustaleva, A.A. Mandrugin, K.B. Gurevich

    Published 1997-04-01
    “…The influence of the non-homogeneity of the silica support and the nature and amount of modifier employed on the adsorption properties of materials with chemically bonded amino and guanidino groups was studied by means of gas chromatography (GC), adsorption measurements under static conditions and IR spectroscopy. …”
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    The structural regulation of H-bonding network in the chemically-bonded polyimide/silica nanocomposite with excellent mechanical stability and improved moisture resistance by Hao Wang, Ziqiao Wang, Naihang Kuang, Yujiu Yang, Chunhua Zhang

    Published 2025-02-01
    “…In this paper, a kind of hydroxyl-rich silica nanomaterial was prepared and used for fabricating the chemically-bonded polyimide (PI)/hydroxyl-rich silica (SiO2-OH) nanocomposite through the surface-initiated curing and the coupling reaction, which then regulate the H-bonding network within the PI matrix. …”
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    Tracking the structural change of the predissociating molecule near the transition state by Junggil Kim, Minseok Kang, Jun-Ho Yoon, Sang Kyu Kim

    Published 2025-01-01
    “…Herein, the dynamical behavior of the reactive flux on the verge of chemical bond breakage was revealed through the spectroscopic characterization of a large amplitude vibrational motion. …”
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  12. 12

    Damage initiation in brittle and ductile materials as revealed from a fractoluminescence study by Alexandre Chmel, Igor’ Shcherbakov

    Published 2014-09-01
    “…A set of heterogeneous and homogeneous materials differing in their brittle and ductile characteristics (granite, marble, silica ceramics, silicon carbide, organic glass) were subjected to impact damaging by a falling weight. Multiple chemical bond ruptures produced by elastic waves propagating from a damaged zone were accompanied by the photon emission generated throughout the sample (tribo- or fractoluminescence, FL). …”
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  13. 13

    Peculiarities Associated with the Adsorption of Inorganic and Organic Nitrogen-Containing Compounds on Amorphous Metal Surfaces by M.O. Kovbuz, O.M. Hertsyk, L.M. Bednars'ka

    Published 1999-07-01
    “…Such behaviour has been observed for the adsorption of organic nitrogen-containing inhibitors on an iron-based amorphous alloy surface, although when the quantity of iron atoms is sufficient chemisorption with the formation of surface compounds of planar orientation is possible. The chemical bond is formed via the free electron pair associated with nitrogen, which results in a high activation energy (E a ) for the adsorption process. …”
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  14. 14

    Study of the Kinetics Adsorption of Organic Pollutants on Modified Cellulosic Polymer Using Ultraviolet-Visible Spectroscopy by Djamila Ghemati, Djamel Aliouche

    Published 2013-01-01
    “…Our results indicate formation of a permanent chemical bond between β-cyclodextrin and polymers material. …”
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  15. 15

    Bending and Shear Experimental Tests and Numerical Analysis of Composite Slabs Made Up of Lightweight Concrete by F. P. Alvarez Rabanal, J. Guerrero-Muñoz, M. Alonso-Martinez, J. E. Martinez-Martinez

    Published 2016-01-01
    “…Coulomb friction contact was used to model the coefficient of friction between steel and concrete. Finally, a chemical bond was included to consider sliding resistance in the contact surface between steel and concrete. …”
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  16. 16

    GREEN SYNTHESIS OF SULFUR NANOPARTICLES USING ZIZIPHUS-SPINA TREE LEAVES AND THEIR ANTIBACTERIAL ACTIVITY by R. M. Hasan, M. M. Sirhan, H. Kh. Ali

    Published 2024-12-01
    “…FT-IR analysis showed a sharp peak for sulfur nanoparticles at 460 cm-1, indicating that their surface contained a new chemical bond.  This shows that the carbonyl residue of amino acids found in the material extracted from the Ziziphus spina tree may be a means for linking it to sulfur molecules.…”
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  17. 17

    Self‐healing polymers in rigid and flexible perovskite photovoltaics by Fang‐Cheng Liang, Erdi Akman, Sikandar Aftab, Mustafa K. A. Mohammed, H. H. Hegazy, Xiujuan Zhang, Fei Zhang

    Published 2025-01-01
    “…Here, first, the fundamental chemical bond types of self‐healing polymers are presented. …”
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  18. 18

    Thermodynamic Molecular Switch in Sequence-Specific Hydrophobic Interaction: Two Computational Models Compared by Paul Chun

    Published 2003-01-01
    “…The change in inherent chemical bond energy at 0 K, ΔH°(T0) is 7.53 kcal mol-1 compared with 2.4 kcal mol-1, while ‹ts› is 365 K as compared with 355 K, for the Nemethy-Scheraga and Planck-Benzinger model, respectively. …”
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    Strength characteristics and prediction model of solidified municipal sludge reinforced by dredged silt combined with sodium silicate and polyurethane by Yupeng Cao, Hui Lin, Tong Zong, Xiangbo Xu, Mingdong Li, Xia Bian, Zhiqiang Li

    Published 2024-12-01
    “…Appropriate proportion (0.5:1.0) of sodium silicate, which accelerates cement hardening, and polyurethane, which facilitates chemical bond cooperation, was combined to form SP material, partially replacing cement. …”
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    Fodder qualities of heterotic hybrids from intergeneric crosses between maize and eastern gamagrass by P. A. Panikhin, V. A. Sokolov

    Published 2020-04-01
    “…Maize, as a plant with the C4 pathway of photosynthesis, is highly efficient in transforming the energy of light into chemical bond energies, which ultimately leads to the highest yield per unit area of cultivated land. …”
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