Showing 1,521 - 1,540 results of 2,155 for search '"endotherms"', query time: 0.10s Refine Results
  1. 1521

    Fabrication of magnesium oxide–calcium alginate hydrogel for scaffolding yttrium and neodymium from aqueous solutions by M. Ghaly, B. A. Masry, E. M. Abu Elgoud

    Published 2023-09-01
    “…The calculated thermodynamic parameters for the nano MgO/Ca-alginate/Nd/Y system show that the positive charge of ΔHo confirmed the endothermic nature of the sorption process, ΔSo (positive) indicates an increase in reaction system disordering, and ΔGo (negative) indicates a spontaneous process. …”
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  2. 1522
  3. 1523

    Structural control of V2O5 nanoparticles via a thermal decomposition method for prospective photocatalytic applications by Marwa H. Ashery, Mohamed Elnouby, E. M. EL-Maghraby, E. M. Elsehly

    Published 2023-01-01
    “…The thermodynamic parameters indicated that the adsorption was spontaneous and endothermic. The reaction kinetics followed the pseudo-second-order model. …”
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  4. 1524

    Synthesis and characterization of bismuth-doped hydroxyapatite nanorods for fluoride removal by Dagne Bayih Adamu, Enyew Amare Zereffa, Teshome Abdo Segne, Mohd Hasmizam Razali, Bundi Roba Lemu

    Published 2023-07-01
    “…Thermodynamic data revealed that the adsorption process is endothermic and spontaneous. Regeneration and reuse analysis insured that the materials have good potential for reuse. …”
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    Article
  5. 1525

    Gene expression variations in high-altitude adaptation: a case study of the Asiatic toad (Bufo gargarizans) by Weizhao Yang, Yin Qi, Bin Lu, Liang Qiao, Yayong Wu, Jinzhong Fu

    Published 2017-07-01
    “…Conclusions These broadly suppressed expression patterns at high altitudes are in strong contrast to those of endothermic homeotherms, suggesting poikilothermic vertebrates may have adopted different strategies at high altitudes. …”
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    Article
  6. 1526

    Thermostability of Organobentonite Modified with Poly(acrylic acid) by Beata Grabowska, Sylwia Cukrowicz, Karolina Kaczmarska, Sylwia Żymankowska-Kumon, Artur Bobrowski, Bożena Tyliszczak, Natalia Maria Mrówka

    Published 2023-05-01
    “…Dehydroxylation of montmorillonite (MMT) in bentonite begins at about 500 °C, which leads to a drastic structural transformation. An endothermic effect associated with the remodeling of the mineral structure was observed on the DSC curve in the range of 500–750 °C. …”
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  7. 1527

    RSM optimization studies for cadmium ions adsorption onto pristine and acid-modified kaolinite clay by L.S. Mustapha, A.S. Yusuff, P.E. Dim

    Published 2023-08-01
    “…The thermodynamic reveal that the reaction is spontaneous and endothermic in nature, and increase in randomness between the adsorbent and adsorbate. …”
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  8. 1528

    Preparation and dye removal performance of MnFe<sub>2</sub>O<sub>4</sub>@diatomite composite by Song Junying, Huang Zhanbin

    Published 2020-10-01
    “…Massive discharge of dyes by industries into environment has posed a threat to aquatic organisms and human health.In order to reduce dye pollution, a MnFe<sub>2</sub>O<sub>4</sub>@diatomite composite adsorbent(MnFe<sub>2</sub>O<sub>4</sub>@DE) with excellent removal effect of malachite green(MG) in wastewater and simple preparation method was prepared in this study.A variety of characterization methods were used to analyze structural properties of the composite and its adsorption effect on MG was also systematically studied.The results showed that the MnFe<sub>2</sub>O<sub>4 </sub>nanoparticles were well distributed on the surface of diatomite.Compared to two monomer materials, the specific surface area(112.1 m<sup>2</sup>/g) and pore volume(0.24 cm<sup>3</sup>/g) of the composite increased significantly.The as-synthesized composite exhibited enhanced adsorption behavior to MG, and its maximum adsorption capacity could reach 25.70 mg/g, which was up to around 1.89 and 1.13 times as much as that of diatomite(DE) and MnFe<sub>2</sub>O<sub>4</sub> respectively.The adsorption process was spontaneous and endothermic, which was consistent with pseudo-second-order kinetic model and Langmuir model.And MnFe<sub>2</sub>O<sub>4</sub>@DE also showed good reusability.After 4 times of reuse, composite still had 87.56% removal effect on MG.Therefore, MnFe<sub>2</sub>O<sub>4</sub>@DE has good application potential in dye pollution control.…”
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  9. 1529

    Adsorption isotherm, kinetic, and optimization studies for copper (II) removal from aqueous solutions by banana leaves and derived activated carbon by Mona A. Darweesh, Mahmoud Y. Elgendy, Mohamed I. Ayad, AbdelMonem M Ahmed, N.M.Kamel Elsayed, W.A Hammad

    Published 2022-04-01
    “…Values of thermodynamic parameters (ΔG, ΔH, and ΔS) of copper (II) adsorption onto the surface of BL and BLAC revealed the feasibility, spontaneity, and endothermic nature of copper (II) adsorption on these surfaces. …”
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  10. 1530

    SiO2 particles effect on the mechanical properties of the starch/PVA blends by Nahida J. H.

    Published 2018-10-01
    “…It was seen that (PVA) of (Tg=105 oC); The glass transition temperature which was decrease with starch ratio that was attributed to glass transition relaxation process due to micro-Brownian motion of the main chain back bond. The endothermic peak at 200 oC was attributed to melting point of (PVA). …”
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  11. 1531

    Adsorption of Congo Red Dye from Aqueous Solution using ZnO and Al2O3/ZnO Composite: Isotherm, Kinetic and Thermodynamic Data by M. O. Bello, R. T. Oyewumi-Musa, N. Abdus-Salam, M. T. Gbenro, O. G. Egbeneye

    Published 2022-06-01
    “…Experimentally, the process was endothermic and was supported by the positive values of enthalpy (ΔH) with positive values of entropy (ΔS). …”
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  12. 1532

    A Novel Low-Cost Bio-Sorbent Prepared from Crisp Persimmon Peel by Low-Temperature Pyrolysis for Adsorption of Organic Dyes by Lu-Qing Xie, Xin-Yu Jiang, Jin-Gang Yu

    Published 2022-08-01
    “…The adsorption thermodynamics illustrated that the adsorption of MB onto CPP200 was spontaneous and endothermic. EDS and IR analyses of CPP200 for both pre- and post-adsorption of MB showed that electrostatic interactions between oxygen-containing groups on biochar and target MB dominated the adsorption procedure, in addition to hydrogen bonding interactions. …”
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  13. 1533

    Co-Utilization of Sewage Sludge and Rice Husk in Ceramsite Preparation with Selective Adsorption Capacity to Pb by Rui Wang, Meng Lu, Junxing Wang

    Published 2022-06-01
    “…Thermodynamic parameters (ΔH<sup>0</sup> > 0, ΔG<sup>0</sup> < 0, ΔS<sup>0</sup> > 0) indicated that the adsorption reaction was spontaneous and endothermic. The possible adsorption mechanisms are as follows: (1) SRC is rich in layered mesoporous structure, which provides sufficient reaction sites for Pb adsorption; (2) the sintered lawsonite and muscovite can strongly attract Pb and then form a new phase (Pb<sub>10</sub>[Si<sub>2</sub>O<sub>7</sub>]<sub>3</sub>(OH)<sub>2</sub>); (3) Pb<sup>2+</sup> can bond with the Si–O- bond in aluminosilicates, and the introduction of Pb elevates the degree of polymerization of aluminosilicates in turn, indicating that the adsorption process is stable.…”
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  14. 1534

    Removal of Nickel (II) ions from Aqueous Solutions Using Chicken Feather Nanoparticles: Study of Kinetic, Isotherm and Thermodynamic Models by Hassan Rezaei, Sanaz Naseri

    Published 2021-10-01
    “…The thermodynamic parameters such as Gibb's Free Energy (ΔG), Enthalpy (ΔH) and Entropy (ΔS) indicated that the adsorption of nickel ion were spontaneous and endothermic at 288–313 °K. Comparing the determination coefficients between measured data and obtained value from pseudo- second-order model (R2 = 0.95) and pseudo- first-order model (R2 = 0.65) showed that the pseudo- second-order model describes experimental data better. …”
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  15. 1535

    Triborheological Study under Physiological Conditions of PVA Hydrogel/HA Lubricant as Synthetic System for Soft Tissue Replacement by Laura C. Duque-Ossa, Gustavo Ruiz-Pulido, Dora I. Medina

    Published 2021-02-01
    “…Thermal behavior was evaluated by differential scanning calorimetry (DSC) in the range of 25–250 °C (5 °C/min rate), showing an endothermic behavior with a melting temperature (Tm) around 231.15 °C. …”
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  16. 1536

    Equilibrium, Kinetic and Thermodynamic Studies of Biosorption of Methylene Blue on Goethite Modified Baobab Fruit Pod (<i>Adansonia Digitata</i> L.) by A.H. Alabi, E.O. Oladele, A.J.O. Adeleke, F.C. Oni, C.A. Olanrewaju

    Published 2020-08-01
    “…GMB adsorbed more of MB than UB and the process was endothermic. Keywords: Biosorption, Goethite, Baobab, Isotherms, Methylene blue. …”
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  17. 1537

    Towards Sustainable Protein Sources: The Thermal and Rheological Properties of Alternative Proteins by Kaitlyn Burghardt, Tierney Craven, Nabil A. Sardar, Joshua M. Pearce

    Published 2024-01-01
    “…The differential scanning calorimetry analysis produced dry amorphous-shaped curves and paste curves with a more distinct endothermic peak. The extracted linear temperature ranges for processing within food production were 70–90 °C for spirulina, 87–116 °C for soy protein, 67–77 °C for pea protein, and 87–97 °C for brown rice protein. …”
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  18. 1538

    Magnetic biochar derived from Juglans regia for the adsorption of Cu2+ and Ni2+: Characterization, modelling, optimization, and cost analysis by Runit Isaac, Shaziya Siddiqui, Obaid F. Aldosari, Mohammad Kashif Uddin

    Published 2023-11-01
    “…In terms of thermodynamic parameters, it appears that the adsorption of Cu2+ and Ni2+ took place in an endothermic and physical manner. The thermodynamic study determined that the activation energy (KJ/Mol) for Cu was 117.27 and for nickel was 100.24. …”
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  19. 1539

    SIMULASI PENGARUH STEAM-TO-CARBON RATIO DAN TUBE OUTLET TEMPERATURE TERHADAP REAKSI STEAM REFORMING PADA PRIMARY REFORMER DI PABRIK AMONIAK by Muhammad Natsir Hakiki, Muslikhin Hidayat, Sutijan Sutijan

    Published 2017-11-01
    “…In Primary Reformer, the reaction commonly occurred at 450-800oC and 36 bars. The endothermic reaction occurred in Ni-based catalyst inside the tube. …”
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  20. 1540

    Synthesis of a nanocomposite with holocellulose extracted from barley straw and montmorillonite, and optimization of the removal of methylene blue dye using the synthesized adsorbe... by Ali Farzi, Milad Soltani, Alireza Ostadrahimi, Hamid Soleimanzadeh, Mehran Namjoufar

    Published 2023-11-01
    “…Moreover, thermodynamic study revealed that adsorption of methylene blue is endothermic and spontaneous while enthalpy and Gibbs free energy of adsorption are positive and negative, respectively. …”
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