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Journal articles on the topic 'Activation energy'

Author: Grafiati

Published: 4 June 2021

Last updated: 25 July 2025

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1

Mercer, Kenneth L. "Activation Energy." Journal - American Water Works Association 111, no. 10 (2019): 2. http://dx.doi.org/10.1002/awwa.1374.

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2

Romanyshyn, Yuriy, Andriy Smerdov, and Svitlana Petrytska. "Energy Model of Neuron Activation." Neural Computation 29, no. 2 (2017): 502–18. http://dx.doi.org/10.1162/neco_a_00913.

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On the basis of the neurophysiological strength-duration (amplitude-duration) curve of neuron activation (which relates the threshold amplitude of a rectangular current pulse of neuron activation to the pulse duration), as well as with the use of activation energy constraint (the threshold curve corresponds to the energy threshold of neuron activation by a rectangular current pulse), an energy model of neuron activation by a single current pulse has been constructed. The constructed model of activation, which determines its spectral properties, is a bandpass filter. Under the condition of mini

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3

Skomski, R., R. D. Kirby, and D. J. Sellmyer. "Activation entropy, activation energy, and magnetic viscosity." Journal of Applied Physics 85, no. 8 (1999): 5069–71. http://dx.doi.org/10.1063/1.370093.

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4

Mirzaee, E., S. Rafiee, A. Keyhani, and Z. Emam-Djomeh. "Determining of moisture diffusivity and activation energy in drying of apricots." Research in Agricultural Engineering 55, No. 3 (2009): 114–20. http://dx.doi.org/10.17221/8/2009-rae.

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In this study, Fick’s second law was used as a major equation to calculate the moisture diffusivity for apricot fruit with some simplification. Drying experiments were carried out at the air temperatures of 40, 50, 60, 70, and 80°C and the drying air velocity of 1, 1.5 and 2 m/s. The experimental drying curves showed only a falling drying rate period. The calculated value of the moisture diffusivity varied from 1.7 × 10<sup>–10</sup> to 1.15 × 10<sup>–9</sup> m<sup>2</sup>/s for apricot fruit, and the value of activation energy ranged from 29.35 to 33.78 kJ/

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5

Chae, Heehong, and Jangwook Heo. "Evaluation of Environmental Characteristics in Reactor Cavity for Determination of PECS Activation Condition." Journal of Energy Engineering 32, no. 3 (2023): 36–44. http://dx.doi.org/10.5855/energy.2023.32.3.036.

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6

Kharkats, Yu I., and L. I. Krishtalik. "Medium reorganization energy and enzymatic reaction activation energy." Journal of Theoretical Biology 112, no. 2 (1985): 221–49. http://dx.doi.org/10.1016/s0022-5193(85)80284-8.

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7

Cahoon, J. R., and Oleg D. Sherby. "The activation energy for lattice." Metallurgical Transactions A 23, no. 9 (1992): 2491–500. http://dx.doi.org/10.1007/bf02658053.

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8

Alkhayat, Rabee B., Hala Nazar Mohammed, and Yasir Yahya Kassim. "The Impact of Laser on the Activation Energy and Sensitivity of CR-39 Detector." NeuroQuantology 20, no. 2 (2022): 113–18. http://dx.doi.org/10.14704/nq.2022.20.2.nq22077.

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The influence of laser radiation on bulk and etch rates, and as well detector sensitivity, before and after being irradiated with alpha particles at 5 MeV emitted from a 241Am source, are examined at different etching temperatures (65, 67, 69, 71, 73, 75, 77, 79 ,81, 83, and 85)C in this paper. A laser source with a wavelength of 480 nm and a pulse energy of 50 mJ/pulse at a repetition rate of 9 Hz was used to investigate the activation energy of a CR-39 polymer. The rates of bulk etch, Vb, and track etch, Vt, slightly increase with laser radiation. Whereas sensitivity decreases as temperatur

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9

Shchurin, K. V., and I. G. Panin. "To change the properties of magnetic fluids in an alternating magnetic field." Informacionno-technologicheskij vestnik 11, no. 1 (2017): 103–14. http://dx.doi.org/10.21499/2409-1650-2017-1-103-114.

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Provides an overview of magnetic fluids and their external activation methods weak energy impacts. Considered the physical basis of magnetic fuel activation with a view to change their molecular and nadmolekuljarnyh structures. A new design of magnetic liquid Activator Wednesday with a high rate of utilization of capacity. Shows comparative testing fuels combustion engine, resulting in significant increase recorded their energy and environmental performance after magnetic fuel activation. Considered a prerequisite applying magnetic rocket fuels activation.

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10

Otero, Toribio F., and Juana Mª García de Otazo. "Polypyrrole oxidation: Kinetic coefficients, activation energy and conformational energy." Synthetic Metals 159, no. 7-8 (2009): 681–88. http://dx.doi.org/10.1016/j.synthmet.2008.12.017.

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11

K. R. Patel, K. R. Patel, Dhara Patel, and Ashish patel. "Study of Activation Energy and Thermodynamic Parameters from TGA of Some Synthesized Metal Complexes." Indian Journal of Applied Research 3, no. 4 (2011): 410–12. http://dx.doi.org/10.15373/2249555x/apr2013/135.

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12

Joseph, Shiju, Siva Uppalapati, and Ozlem Cizer. "Instantaneous activation energy of alkali activated materials." RILEM Technical Letters 3 (March 12, 2019): 121–23. http://dx.doi.org/10.21809/rilemtechlett.2018.78.

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Alkali activated materials (AAM) are generally cured at high temperatures to compensate for the low reaction rate. Higher temperature accelerates the reaction of AAM as in cement-based materials and this effect is generally predicted using Arrhenius equation based on the activation energy. While apparent activation energy is calculated from parallel isothermal calorimetry measurements at different temperatures, instantaneous activation energy is typically measured using a differential scanning calorimeter. Compared to the apparent activation energy, instantaneous activation energy has minimal

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13

Jiang, Heming, and Tian-Yu Sun. "The Activating Effect of Strong Acid for Pd-Catalyzed Directed C–H Activation by Concerted Metalation-Deprotonation Mechanism." Molecules 26, no. 13 (2021): 4083. http://dx.doi.org/10.3390/molecules26134083.

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A computational study on the origin of the activating effect for Pd-catalyzed directed C–H activation by the concerted metalation-deprotonation (CMD) mechanism is conducted. DFT calculations indicate that strong acids can make Pd catalysts coordinate with directing groups (DGs) of the substrates more strongly and lower the C–H activation energy barrier. For the CMD mechanism, the electrophilicity of the Pd center and the basicity of the corresponding acid ligand for deprotonating the C–H bond are vital to the overall C–H activation energy barrier. Furthermore, this rule might disclose the role

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14

Ishibashi, Yoshihiro, and Makoto Iwata. "Activation Energy of Ferroelectric Domain Wall." Journal of the Physical Society of Japan 89, no. 1 (2020): 014705. http://dx.doi.org/10.7566/jpsj.89.014705.

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15

Miura, Daisuke, and Akimasa Sakuma. "Analytic expression for magnetic activation energy." Japanese Journal of Applied Physics 58, no. 5 (2019): 058002. http://dx.doi.org/10.7567/1347-4065/aaffed.

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16

Singh, N. "Activation Energy of Hydrogen in Lu." Materials Science Forum 223-224 (July 1996): 147–50. http://dx.doi.org/10.4028/www.scientific.net/msf.223-224.147.

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17

Lin, Hong Yan, Chun Cai Wang, Cui Yan Yu, and Tao Xu. "Calculation of Nanowire Growth Activation Energy." Advanced Materials Research 512-515 (May 2012): 2064–67. http://dx.doi.org/10.4028/www.scientific.net/amr.512-515.2064.

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Two-step preparation technology was used to prepare anodic aluminum oxide (AAO) templates. Then deposit Ni nanowire arrays in nanopores of AAO templates by direct current deposition. TEM spectra of nanowires show that the length of nanowires is uniform and that the shape of nanowires is the same with that of nanopores. Finally, reaction activation energy of Ni growing in nanopores was calculated by experimental data. Results show that Ni growing in the smaller nanopores is much easier than in the bigger nanopores.

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18

Reissner, M., R. Ambrosch, and W. Steiner. "Effective activation energy in high Tcsuperconductors." Superconductor Science and Technology 4, no. 1S (1991): S436—S438. http://dx.doi.org/10.1088/0953-2048/4/1s/131.

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19

Reissner, M., D. Proschofsky-Spindler, I. Hušek, M. Kulich, and P. Kováč. "Activation Energy Distribution of MgB2 Wires." Physics Procedia 36 (2012): 1582–87. http://dx.doi.org/10.1016/j.phpro.2012.06.214.

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20

Kholmanskiy, Alexander. "Activation energy of water structural transitions." Journal of Molecular Structure 1089 (June 2015): 124–28. http://dx.doi.org/10.1016/j.molstruc.2015.02.049.

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21

Gaunt, P. "Magnetic viscosity and thermal activation energy." Journal of Applied Physics 59, no. 12 (1986): 4129–32. http://dx.doi.org/10.1063/1.336671.

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22

Roesch, William J. "Compound semiconductor activation energy in humidity." Microelectronics Reliability 46, no. 8 (2006): 1238–46. http://dx.doi.org/10.1016/j.microrel.2006.02.006.

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23

Sundararaman, Padmanabhan, Paul H. Merz, and Roy G. Mann. "Determination of kerogen activation energy distribution." Energy & Fuels 6, no. 6 (1992): 793–803. http://dx.doi.org/10.1021/ef00036a015.

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24

Singh, N., and B. Kumar. "Activation energy of hydrogen in Lu." Pramana 48, no. 6 (1997): 1095–103. http://dx.doi.org/10.1007/bf02845884.

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25

Ditali, A., and W. Black. "Activation energy of thin SiO2 films." Electronics Letters 28, no. 21 (1992): 2014. http://dx.doi.org/10.1049/el:19921291.

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26

Nakamura, Takashi, Eunjoo Kim, Yoshitomo Uwamino, Yoshitomo Uno, and Noriaki Nakao. "High Energy Neutron Activation Cross Sections." Journal of Nuclear Science and Technology 39, sup2 (2002): 1392–95. http://dx.doi.org/10.1080/00223131.2002.10875365.

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27

Avramov, Isak. "Non-equilibrium viscosity and activation energy." Journal of Non-Crystalline Solids 355, no. 34-36 (2009): 1769–71. http://dx.doi.org/10.1016/j.jnoncrysol.2009.07.006.

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28

Saucedo-Castañeda, Gerardo, Maurice Raimbault, and Gustavo Viniegra-González. "Energy of activation in cassava silages." Journal of the Science of Food and Agriculture 53, no. 4 (1990): 559–62. http://dx.doi.org/10.1002/jsfa.2740530413.

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29

Moroshkina, Anastasia, Alina Ponomareva, Vladimir Mislavskii, et al. "Activation Energy of Hydrogen–Methane Mixtures." Fire 7, no. 2 (2024): 42. http://dx.doi.org/10.3390/fire7020042.

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In this work, the overall activation energy of the combustion of lean hydrogen–methane–air mixtures (equivalence ratio φ = 0.7−1.0 and hydrogen fraction in methane α=0, 2, 4) is experimentally determined using thin-filament pyrometry of flames stabilised on a flat porous burner under normal conditions (p=1 bar, T = 20 °C). The experimental data are compared with numerical calculations within the detailed reaction mechanism GRI3.0 and both approaches confirm the linear correlation between mass flow rate and inverse flame temperature predicted in the theory. An analysis of the numerical and expe

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30

Lai, Quang Tuan, Trinh Hai Son, Thi Minh Ngoc Nguyen, Sanggyu Lee, Danish Khan Mohd, and Ji Whan Ahn. "Carbon Mineralization Integrated Alkali Activation for Eco-Friendly Enrichment of Rare Earth Elements from Circulating Fluidized Bed Fly Ash." Journal of Energy Engineering 31, no. 1 (2022): 72–82. http://dx.doi.org/10.5855/energy.2022.31.1.072.

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31

Arieta, FG, and CM Sellars. "Activation volume and activation energy for deformation of Nb HSLA steels." Scripta Metallurgica et Materialia 30, no. 6 (1994): 707–12. http://dx.doi.org/10.1016/0956-716x(94)90186-4.

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32

Dorofeyev, V. Yu, D. N. Sviridova, and Kh S. Kochkarova. "On the question of the applicability of G.V. Samsonov’s activated sintering concept in studying the processes of powder material deformation." Izvestiya Vuzov. Poroshkovaya Metallurgiya i Funktsional’nye Pokrytiya (Universitiesʹ Proceedings. Powder Metallurgy аnd Functional Coatings), no. 4 (December 15, 2018): 6–14. http://dx.doi.org/10.17073/1997-308x-2018-4-6-14.

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Some Yu.G. Dorofeev’s memoirs about joint work and meetings with outstanding materials science expert G.V. Samsonov are given. Meetings in Yugoslavia were of particular importance where G.V. Samsonov and M.M. Ristićtogether with other worldfamous scientists created the International Institute for the Science of Sintering. In the last years of his life, G.V. Samsonov proposed the concept of sintering activation by additives that act as electron acceptors and additionally contribute to the ionic bond in the matrix material. The paper considers the possibility of using this concept in the develop

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33

Salahuddin, T., Nazim Siddique, Maryam Arshad, and I. Tlili. "Internal energy change and activation energy effects on Casson fluid." AIP Advances 10, no. 2 (2020): 025009. http://dx.doi.org/10.1063/1.5140349.

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34

Mierzwiński, Dariusz, Janusz Walter, and Piotr Olkiewicz. "The influence of alkaline activator concentration on the apparent activation energy of alkali-activated materials." MATEC Web of Conferences 322 (2020): 01008. http://dx.doi.org/10.1051/matecconf/202032201008.

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The aim of this article is to analyse the changes of apparent activation energy (Ea) of alkali-activated materials (AAM) at temperatures up to 100°C. Apparent activation energy (Ea) refers to the minimum amount of energy is required for the occurrence of reaction. The existing AAM research is based on assumptions about Portland cement (OPC). A number of studies have been conducted on the development of concrete strength depending on, inter alia, the duration of seasoning and the liquid to solid ratio (L/S). Based on the apparent activation energy and taking into account the effect of time and

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35

Luo, Siyi, Lin Liu, Yanggang Song, et al. "Effect of Activation Pretreatment on the Pyrolysis Behavior of Sludge." Journal of Biobased Materials and Bioenergy 14, no. 4 (2020): 461–66. http://dx.doi.org/10.1166/jbmb.2020.1989.

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In the present research, TG and FTIR were used to study the effect of chemical activation pretreatment on sludge pyrolysis. The results showed that both acidic and alkaline activation promoted sludge pyrolysis. KOH inhibited the elimination of crystallization water and promoted the release of volatiles. On the other hand, H2SO4 favored the separation of crystallization water and the release of volatiles. Low concentrations of the activator promoted the production of combustible gas and inhibited the generation of CO2. By analyzing the activation energy of the pyrolysis process using the Coats-

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36

Fischer, U., S. Simakov, U. v. Möllendorff, P. Pereslavtsev, and P. Wilson. "Validation of activation calculations using the Intermediate Energy Activation File IEAF-2001." Fusion Engineering and Design 69, no. 1-4 (2003): 485–89. http://dx.doi.org/10.1016/s0920-3796(03)00113-3.

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37

Kötting, Carsten, and Klaus Gerwert. "Time-resolved FTIR studies provide activation free energy, activation enthalpy and activation entropy for GTPase reactions." Chemical Physics 307, no. 2-3 (2004): 227–32. http://dx.doi.org/10.1016/j.chemphys.2004.06.051.

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38

Koiwa, Masahiro. "An Essay on “Arrhenius and Activation Energy”." Materia Japan 39, no. 1 (2000): 58–62. http://dx.doi.org/10.2320/materia.39.58.

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39

Borbón-Nuñez, Hugo A., and Claudio Furetta. "Activation Energy of Modified Peak Shape Equations." World Journal of Nuclear Science and Technology 07, no. 04 (2017): 274–83. http://dx.doi.org/10.4236/wjnst.2017.74021.

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40

Carvalho, M. A., and Ana M. Segadães. "Moisture Expansion: Activation Energy versus Firing Temperature." Key Engineering Materials 264-268 (May 2004): 1581–84. http://dx.doi.org/10.4028/www.scientific.net/kem.264-268.1581.

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41

Korovin, Yu A., A. A. Natalenko, A. Yu Konobeyev, A. Yu Stankovskiy, and S. G. Mashinik. "High Energy Activation Data Library (HEAD-2009)." Journal of the Korean Physical Society 59, no. 2(3) (2011): 1080–83. http://dx.doi.org/10.3938/jkps.59.1080.

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42

Titov, D. D., A. S. Lysenkov, Yu F. Kargin, M. G. Frolova, V. A. Gorshkov, and S. N. Perevislov. "Sintering activation energy MoSi2-WSi2-Si3N4 ceramic." IOP Conference Series: Materials Science and Engineering 347 (April 2018): 012024. http://dx.doi.org/10.1088/1757-899x/347/1/012024.

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43

Xu, Gui Ying, Jiang Bo Wang, Ling Ping Guo, and Guo Gang Sun. "Decomposition Kinetics of Switchgrass: Estimating Activation Energy." Advanced Materials Research 881-883 (January 2014): 726–33. http://dx.doi.org/10.4028/www.scientific.net/amr.881-883.726.

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TG analysis was used to investigate the thermal decomposition of switchgrass, which is a potential gasification feedstock. 10 mg switchgrass sample with the particles between 0.45 and 0.70 mm was linearly heated to 873 K at heating rates of 10, 20, 30 K/min, respectively, under high-purity nitrogen. The Kissinger method and three isoconversional methods including Friedman, Flynn-wall-Ozawa, Vyazovkin and Lenikeocink methods were used to estimate the apparent activation energy of switchgrass. With the three isoconversional methods, it can be concluded that the activation energy increases with i

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44

Pachulia, Z. V. "The issue of calculation of activation energy." Journal of Biological Physics and Chemistry 18, no. 2 (2018): 106–10. http://dx.doi.org/10.4024/05pa18l.jbpc.18.02.

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45

Smith, Jonathan M., Matthew Nikow, Jianqiang Ma, et al. "Chemical Activation through Super Energy Transfer Collisions." Journal of the American Chemical Society 136, no. 5 (2014): 1682–85. http://dx.doi.org/10.1021/ja4126966.

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46

Wee, S. F., M. K. Chai, K. P. Homewood, and W. P. Gillin. "The activation energy for GaAs/AlGaAs interdiffusion." Journal of Applied Physics 82, no. 10 (1997): 4842–46. http://dx.doi.org/10.1063/1.366345.

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47

Park, C. W., and R. W. Vook. "Activation energy for electromigration in Cu films." Applied Physics Letters 59, no. 2 (1991): 175–77. http://dx.doi.org/10.1063/1.106011.

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48

Tsang, W. T., E. F. Schubert, and J. E. Cunningham. "Doping in semiconductors with variable activation energy." Applied Physics Letters 60, no. 1 (1992): 115–17. http://dx.doi.org/10.1063/1.107365.

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49

Schultz, Peter J., T. D. Thompson, and R. G. Elliman. "Activation energy for the photoluminescenceWcenter in silicon." Applied Physics Letters 60, no. 1 (1992): 59–61. http://dx.doi.org/10.1063/1.107373.

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50

Jin, X., X. N. Xu, J. S. Zhu, et al. "Oxygen concentration and activation energy in YBa2Cu3Ox." Superconductor Science and Technology 5, no. 1S (1992): S244—S247. http://dx.doi.org/10.1088/0953-2048/5/1s/054.

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