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Journal articles on the topic 'Thermodynamic activation parameters'

Author: Grafiati

Published: 5 June 2025

Last updated: 1 August 2025

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1

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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2

Vyazovkin, Sergey. "Misinterpretation of Thermodynamic Parameters Evaluated from Activation Energy and Preexponential Factor Determined in Thermal Analysis Experiments." Thermo 4, no. 3 (2024): 373–81. http://dx.doi.org/10.3390/thermo4030019.

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Thermogravimetry (TGA) and differential scanning calorimetry (DSC) are used broadly to study the kinetics of thermally stimulated processes such as thermal decomposition (pyrolysis) or thermal polymerization. These studies typically yield the activation energy (E) and preexponential factor (A). The resulting experimental values of E and A are oftentimes used to determine the so-called “thermodynamic parameters”, i.e., the enthalpy, entropy, and Gibbs free energy. Attention is called to the persistent and mistaken trend to interpret the resulting quantities as the thermodynamic parameters of th

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3

Zhou, Chenxi, Bin Yang, Wenliang Fan, and Wei Li. "Brain Model Based on the Canonical Ensemble with Functional MRI: A Thermodynamic Exploration of the Neural System." Complexity 2021 (December 21, 2021): 1–12. http://dx.doi.org/10.1155/2021/9961864.

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Objective. System modeling is an important method to study the working mechanisms of the brain. This study attempted to build a model of the brain from the perspective of thermodynamics at the system level, which brought a new perspective to brain modeling. Approach. Regarding brain regions as systems, voxels as particles, and intensity of signals as energy of particles, the thermodynamic model of the brain was built based on the canonical ensemble theory. Two pairs of activated regions and two pairs of inactivated brain regions were selected for comparison in this study, and the thermodynamic

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Naeem, Kashif, Pan Weiqian, and Feng Ouyang. "Thermodynamic parameters of activation for photodegradation of phenolics." Chemical Engineering Journal 156, no. 2 (2010): 505–9. http://dx.doi.org/10.1016/j.cej.2009.10.026.

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Huang, Zai-Yin, Xing-Xing Li, Zuo-Jiao Liu, Liang-Ming He, and Xue-Cai Tan. "Morphology Effect on the Kinetic Parameters and Surface Thermodynamic Properties of Ag3PO4Micro-/Nanocrystals." Journal of Nanomaterials 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/743121.

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Considerable effort has been exerted using theoretical calculations to determine solid surface energies. Nanomaterials with high surface energy depending on morphology and size exhibit enhanced reactivity. Thus, investigating the effects of morphology, size, and nanostructure on the surface energies and kinetics of nanomaterials is important. This study determined the surface energies of silver phosphate (Ag3PO4) micro-/nanocrystals and their kinetic parameters when reacting with HNO3by using microcalorimetry. This study also discussed rationally combined thermochemical cycle, transition state

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Chen, J. P., A. Hazra, and Z. Levin. "Parameterizing ice nucleation rates using contact angle and activation energy derived from laboratory data." Atmospheric Chemistry and Physics 8, no. 24 (2008): 7431–49. http://dx.doi.org/10.5194/acp-8-7431-2008.

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Abstract. The rate of ice nucleation in clouds is not easily determined and large discrepancies exist between model predictions and actual ice crystal concentration measured in clouds. In an effort to improve the parameterization of ice nucleating in cloud models, we investigate the rate of heterogeneous ice nucleation under specific ambient conditions by knowing the sizes as well as two thermodynamic parameters of the ice nuclei – contact angle and activation energy. Laboratory data of freezing and deposition nucleation modes were analyzed to derive inversely the two thermodynamic parameters

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7

Gandova, Vanya, and Ivalina Petrova. "Black chokeberry (Aronia melanocarpa) copigmentation reaction: Thermodynamic and kinetic investigations." BIO Web of Conferences 122 (2024): 01001. http://dx.doi.org/10.1051/bioconf/202412201001.

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Two type of parameters (thermodynamics and kinetics) were used to determine thermal stability of copigmentation process in black chokeberry: chlorogenic acid system. According to thermodynamic investigations copigmentation complex was destroyed at high temperature and restored again at low temperature. Different parameters kinetic rate constant, energy of activation and z-factor were presented and the reaction Based on them the order of the reaction was determined as first order.

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Saha, Tapan K., Subarna Karmaker, and Md F. Alam. "Kinetics, mechanism and thermodynamics involved in sorption of meso-tetrakis(4-sulfonatophenyl)porphyrin onto chitosan in aqueous medium." Journal of Porphyrins and Phthalocyanines 18, no. 03 (2014): 240–50. http://dx.doi.org/10.1142/s1088424613501174.

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Sorption of meso-tetrakis(4-sulfonatophenyl)porphyrin ( H 2 tpps ) onto chitosan has been investigated in aqueous medium. Kinetic and isotherm studies were carried out by considering the effects of various parameters, such as pH, initial concentration of H 2 tpps solution, and temperature. The kinetic data obtained from different batch experiments were analyzed using pseudo first-, second-order, intraparticle, and film diffusion kinetic models. The equilibrium sorption data was analyzed by using Tempkin, Langmuir and Freundlich models. The best results were achieved with the pseudo second-orde

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O., P. BANSAL, and K. CHATURVEDI A. "Kinetics of Benalate Adsorption on Kaolinites." Journal of Indian Chemical Society Vol. 69, Mar 1992 (1992): 132–35. https://doi.org/10.5281/zenodo.5992530.

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Chemistry Department, D. S. College, Aligarh-202 001 <em>Manuscript received 5 October 1989, revised 25 February 1992, accepted 13 March 1992</em> Kinetics of benalate adsorption of H-, Na- and Ca-saturated kaolinites have been<em> </em>investigated. The adsorption and desorption rate constants obtained were in agreement with those obtained from the Lindstrom <em>et αl. </em>model, which proved useful in the simultaneous evaluation of adsorption and desorption rate constants. The activation energies, heats of activation and entropies of activation along with thermodynamic parameters

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Emeniru, Daniel C., John Neminebor, Justin Ikirigo, and Franklin Sogbara. "Perspective View on Sorption Thermodynamics: Basic Dye Uptake on Southern Nigerian Clay." European Scientific Journal, ESJ 13, no. 18 (2017): 355. http://dx.doi.org/10.19044/esj.2017.v13n18p355.

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Macroscopic phenomenon like adsorption has a mechanistic tie typical of thermodynamics and its principles. This work examined the thermodynamic parameters for methylene blue (MB) uptake onto modified Ekowe clay (EC). The purified clay was calcined for 4hrs. at 750 oC to obtain Natural Ekowe Clay (NEC). The purified clay was activated (1.6M H2SO4 (aq)) and calcined for 4hrs. at 750 oC obtaining Activated Ekowe Clay (AEC). Thermodynamic study applied the equilibrium data in determining the activation and heats of adsorption parameters. The concave Eyring plot suggests more than one rate-limiting

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11

Ibrahim Hamadamin, Shireen. "Effect of the dried limes (Citrus aurantifolia) on the caffeine kinetic extraction in black tea leaves (kinetic and thermodynamic study)." Bulletin of the Chemical Society of Ethiopia 36, no. 3 (2022): 697–705. http://dx.doi.org/10.4314/bcse.v36i3.18.

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ABSTRACT. The kinetic and thermodynamic parameters were studied for the extraction of caffeine in black tea leaves and tea leaves containing antioxidant dried limes (Citrus aurantifolia). Caffeine is widely used in human consumption and is present in any liquid suitable for drinking except water. However, the health and environmental demerits make it significant to reduce caffeine to much less concentration or decaffeination. Therefore, the effect of the dried antioxidant Citrus aurantifolia on caffeine concentration followed by pseudo-first-order reaction, kinetic parameters (pseudo-first-ord

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12

BALJEET, KAUR SATSANGI, and KOTHARI SEEMA. "Kinetics and Mechanism of the Oxidation of some Hydroxy Acids by Bis(2,2 '-bipyridyl)copper(II) Permanganate." Journal of Indian Chemical Society Vol. 74, Jan 1997 (1997): 16–20. https://doi.org/10.5281/zenodo.5876440.

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Chemistry Department, Faculty of Science, Suez Canal University, Ismailia, Egypt <em>Manuscript received 10 April 1995, accepted 6 July 1995</em> The oxidation of glycollic, lactic, mandelic and nine monosubstituted mandelic acids by bis(2,2'-bipyridyl)copper(II) permanganate (BBCP) in aqueous acetic acid solution leads to the formation of the corresponding oxoacids. The reaction is first order with respect to BBCP. Michaelis-Meten type kinetics have been observed with respect to the hydroxy acid. The formation constants for the hydroxy acid-BBCP complexes and the rates of their decomposit

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13

Barghamadi, Mohammad. "Isothermal kinetics and thermodynamics studies of curing reaction of epoxy-aromatic diamine reinforced with epoxy functional MWCNT." High Performance Polymers 29, no. 7 (2016): 827–35. http://dx.doi.org/10.1177/0954008316660367.

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This study reports the cure kinetics and thermodynamics of an epoxy functional multiwall carbon nanotube-containing epoxy nanocomposite obtained by the polymerization of diglycidyl ether of bisphenol A with diaminodiphenyl sulfone as a curing agent through isothermal technique of differential scanning calorimetry. Isothermal kinetic parameters including reaction orders ( m, n), rate constants ( k1, k2), activation energy ( Ea), and pre-exponential factor ( A) were estimated using Kamal autocatalytic model. The model gives a good description of curing kinetics at various temperatures prior to t

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14

Sharifi, Soheil, and Jahanbakhsh Mashaiekhy Asl. "Secondary Relaxation inside the Glass." ISRN Materials Science 2011 (July 20, 2011): 1–10. http://dx.doi.org/10.5402/2011/764874.

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The physical properties of the glass depend on the procedure used to produce the glass. In particular, if the glass is obtained through the variation of external thermodynamic parameters, the specific way in which the parameters are varied (thermodynamic history) has influence on the final properties. In this work, we studied the effect of thermodynamic history on secondary relaxation inside the glassy state on different molecular glass forming, namely, PPGE(poly[(phenyl glycidyl ether)-co-formaldehyde]), 1,18-bis (p methoxyphenyl) cyclohexane (BMPC), poly(propylene glycol)—(PPG400), phenolpht

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15

J., ISHWARA BHAT, and G. GAONKAR SHANTARAM. "Studies on Conductance Behavior of N-Bromosuccinimide in varying Compositions of Water-DMF at different Temperatures." Journal of Indian Chemical Society Vol. 75, May 1998 (1998): 304–6. https://doi.org/10.5281/zenodo.5927408.

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Department of Studies in Chemistry, Mangalore University, Mangalagangothri-574 199 Department of Chemistry, Gokhale Centenary College, Ankola, Uttara Kannada <em>Manuscript received 19 November 1996, revised 5 May 1997, accepted 5 July 1997</em> The electrical conductance behavior of N-bromosuccinimide in water in presence of N,N-dimethylformamide has been investigated. The initial increase and later decrease in limiting conductance with DMF hints either the higher ion solvation or the formation of some ionaggregation. The conductance data obtained were analyzed by Debye-Hückel-Onsager an

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16

Kolhe, S. B., and S. G. Badhe. "Microwave Dielectric Study of Binary Mixture of Ethyl Acetate with Propylene Glycol using Time Domain Reflectometry Technique." Asian Journal of Chemistry 36, no. 11 (2024): 2635–39. http://dx.doi.org/10.14233/ajchem.2024.32624.

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Microwave dielectric study for the binary mixtures of ethyl acetate with propylene glycol was performed over the frequency range of 10 MHz –20 GHz and in the temperature range of 288 K to 318 K using time domain reflectometry technique. Dielectric parameters such as static dielectric constant (εs), relaxation time (τ), excess dielectric constant (εs)E, excess inverse relaxation time (1/τ)E, Kirkwood correlation factor (geff), Bruggeman factor (fB) and thermodynamic parameters viz. molar enthalpy of activation, molar entropy of activation were also determined. Variation of measured dielectric a

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17

Thomas, Anoop, Anjali Jayachandran, Lucas Lethuillier-Karl, et al. "Ground state chemistry under vibrational strong coupling: dependence of thermodynamic parameters on the Rabi splitting energy." Nanophotonics 9, no. 2 (2020): 249–55. http://dx.doi.org/10.1515/nanoph-2019-0340.

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AbstractVibrational strong coupling (VSC) is currently emerging as a tool to control chemical dynamics. Here we study the impact of strong coupling strength, given by the Rabi splitting energy (ħΩR), on the thermodynamic parameters associated with the transition state of the desilylation reaction of the model molecule 1-phenyl-2-trimethylsilylacetylene. Under VSC, the enthalpy and entropy of activation determined from the temperature-dependent kinetic studies varied nonlinearly with the coupling strength. The thermodynamic parameters of the noncavity reaction did not show noticeable variation,

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18

Saleh, Muhammad A., Shamim Akhtar, M. Shamsuddin Ahmed, and Muhammad A. R. Khan. "Thermodynamic activation parameters for viscous flow of aqueous solutions of butylamines." Physics and Chemistry of Liquids 44, no. 5 (2006): 501–12. http://dx.doi.org/10.1080/00319100600647691.

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19

Wayland, Bradford B., Alexei A. Gridnev, Steven D. Ittel, and Michael Fryd. "Thermodynamic and Activation Parameters for a (Porphyrinato)cobalt-Alkyl Bond Homolysis." Inorganic Chemistry 33, no. 17 (1994): 3830–33. http://dx.doi.org/10.1021/ic00095a029.

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20

Kumar, Gopu. "Thermodynamic Activation Parameters for Viscous Flow in Acetonitrile-Water-Electrolyte Systems." Berichte der Bunsengesellschaft für physikalische Chemie 96, no. 4 (1992): 554–57. http://dx.doi.org/10.1002/bbpc.19920960408.

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21

Tabesh, Rola N., Ashraf Moustafa Abdel-Gaber, Hassan H. Hammud, and Rami Al-Oweini. "Inhibition of Steel Corrosion in Sulfuric Acid Solution by 1,10-Phenanthroline, para-Aminobenzoate and their Corresponding Manganese Complex." Zeitschrift für Physikalische Chemie 233, no. 11 (2019): 1553–69. http://dx.doi.org/10.1515/zpch-2018-1254.

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Abstract The ligands 1,10-phenanthroline, (P) and para-aminobenzoate, (B); as well as their corresponding MnPB complex [bis-(dimanganese di-μ-paraaminobenzoate dichloro diphenanthroline)] have been investigated as inhibitors of mild steel corrosion in H2SO4 (0.5 M) solutions via potentiodynamic and electrochemical impedance spectroscopy techniques. Stability of the prepared complex was examined by UV-visible spectroscopy. The corrosion inhibition, thermodynamics, and adsorptive properties obtained have shown that MnPB complex has remarkable effects in the acidic solutions. Theoretical fitting

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22

Wiseman, Floyd L., and Dane W. Scott. "A technique for analyzing the variability of activation thermodynamic and solvent model parameters." RSC Advances 15, no. 6 (2025): 4111–19. https://doi.org/10.1039/d4ra07211a.

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23

Quang, Nguyen Xuan, Ho Si Thoang, and Milan Šípek. "Some relations between thermodynamic and kinetic parameters in heterogeneous catalysis." Collection of Czechoslovak Chemical Communications 54, no. 11 (1989): 2970–73. http://dx.doi.org/10.1135/cccc19892970.

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The results of our preceding work on irreversible (rational) thermodynamics of reacting mixture of fluids and a solid substance are applied to the problem of heterogeneous catalysis. The negative effect of diffusion and the positive effect of surface forces are justified, and the Bronsted-Polanyi equation for the activation energy of surface reaction is obtained.

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24

Singare, Pravin U. "Application of radio analytical tracer technique to study the performance of industrial grade ion exchange resin exposed to UV radiations." Kerntechnik 87, no. 2 (2022): 196–207. http://dx.doi.org/10.1515/kern-2020-0033.

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Abstract The thermodynamics and kinetics of bromide ion-isotopic exchange reactions performed by using fresh and UV radiation degraded industrial grade anion exchange resin Duolite A-638 resins were studied by application of radio analytical tracer technique. The reaction rate k in min−1 for the fresh resin decreases sharply with decrease in wavelength of UV radiations. Thus for 0.200 M labeled bromide ion solution maintained at a constant temperature of 30.0 °C, the k value for fresh resin (0.367 min−1), decreases to 0.335 min−1 for λ384 UV radiation degraded resin, which further decreases to

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25

Wiseman, F. L., D. W. Scott, W. C. Cooper, J. Tamine, R. O'Connell, and N. Mitchell. "Detailed thermodynamic analysis of the activation parameters for the simple hydrolysis of acetic anhydride in the acetonitrile/water cosolvent system." RSC Advances 7, no. 46 (2017): 28965–78. http://dx.doi.org/10.1039/c7ra05260j.

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Charity, Aghariagbonse Osagiede and George Chidozie Nwagu. "Characterization, Kinetics, and Thermodynamics Analysis of Palm Kernel Oil Extraction." Journal of Energy Technology and Environment 5, no. 2 (2023): 16–24. https://doi.org/10.5281/zenodo.8018158.

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<em>The inefficiency frequently encountered in oil extractors can be attributed to the insufficient availability of kinetics and thermodynamic data during the design phase. This study examined the kinetics and thermodynamics involved in the extraction of oil from palm kernel seeds. The mass transfer kinetic power model and the laws of thermodynamics were applied to describe the kinetics and the thermodynamics of the oil extraction process, respectively. The physicochemical parameters of the palm kernel oil extracted were determined according to the methods recommended by the Association of Off

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27

Patil, Dilip B., Vijendra Batra, and Sushil B. Kapoor. "Kinetic Studies on Saponification of Poly(ethylene terephthalate) Waste Powder Using Conductivity Measurements." Journal of Polymers 2014 (August 25, 2014): 1–7. http://dx.doi.org/10.1155/2014/321560.

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Conductometric measurement technique has been deployed to study the kinetic behavior during the reaction of poly(ethylene terepthalate) (PET) and NaOH. A laboratory made arrangement with facility of continuous stirring was used to carry out experiments at desired temperature. With conductometry, the determination of kinetic as well as thermodynamic parameters becomes more simple and faster as compared to gravimetry. Chemical kinetics of this reaction shows that it is a second order reaction with reaction rate constant 2.88×10-3 g−1 s−1 at 70°C. The specific reaction rates of the saponification

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28

Saugat, Jahan*1 &. Dr A. A. Ansari2. "THERMODYNAMIC AND KINETIC STUDIES ON THE MICELLIZATION OF SODIUM DODECYL SULPHATE IN AQUEOUS AND 1,4-DIOXANE SYSTEM." GLOBAL JOURNAL OF ENGINEERING SCIENCE AND RESEARCHES 5, no. 9 (2018): 243–53. https://doi.org/10.5281/zenodo.1435700.

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The micellization behavior of anionic surfactant SDS in water and in mixed solvent media have been investigated  by conductometric and kinetic method were monitored conductometrically using digital conductometer  and The changes in absorbance of reaction mixture with time were monitored spectrophotometrically at 291 nm using cary 16 UV-visible spectrophotometer in the  temperature range of 298.15 to 313.150K. The obtained results have been used to estimate the thermodynamic and kinetic parameters of micellization. Experimental data indicate that the CMC of surfactant increases w

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29

EFENTAKIS, M., and G. BUCKTON. "Modelling drug release from hydrophobic matrices by use of thermodynamic activation parameters." International Journal of Pharmaceutics 60, no. 3 (1990): 229–34. http://dx.doi.org/10.1016/0378-5173(90)90076-g.

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30

Lonhienne, Thierry, Charles Gerday, and Georges Feller. "Psychrophilic enzymes: revisiting the thermodynamic parameters of activation may explain local flexibility." Biochimica et Biophysica Acta (BBA) - Protein Structure and Molecular Enzymology 1543, no. 1 (2000): 1–10. http://dx.doi.org/10.1016/s0167-4838(00)00210-7.

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Santos, J. C. O., Amanda D. Oliveira, C. C. Silva, J. D. S. Silva, A. G. Souza, and L. N. Lima. "Kinetic and activation thermodynamic parameters on thermal decomposition of synthetic lubricant oils." Journal of Thermal Analysis and Calorimetry 87, no. 3 (2007): 823–29. http://dx.doi.org/10.1007/s10973-006-7774-0.

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32

Garcia, Bego�a, Rafael Alcalde, and Jos� M. Leal. "Activation thermodynamic parameters of binary mixtures of propionic acid ando-substituted anilines." Journal of Solution Chemistry 22, no. 9 (1993): 797–807. http://dx.doi.org/10.1007/bf00648583.

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33

T, SAMANTA, and S. BASU A. "Studies on the Membrane Conductance with a Millipore Filter Paper at different Temperatures in Presence of Alkali Chlorides and the Energetics of Ion Transportation by the Application of Absolute Reaction Rate Theory." Journal of Indian Chemical Society Vol.70, Sep 1993 (1993): 749–53. https://doi.org/10.5281/zenodo.5939643.

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Department of Chemistry, University of Burdwan, Burdwan-713 104 <em>Manuscript received 15 June 1992, revised 8 February 1993, accepted 23 March 1993</em> Conductance behaviour of a millipore membrane bathed in some common alkali metal chloride solutions at different concentrations has been studied at different temperatures. Membrane conductance values generally increase smoothly with increasing concentrations tending towards limiting values at higher concentrations. The order of magnitude of conductances within the membrane pores (K<sup>+</sup> > \(NH_4^+\) > Na<sup>+</sup> &g

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Mariyam, Sabah, Tareq Al-Ansari, and Gordon McKay. "Multibiomass and Natural Marine Waste Catalyst Copyrolysis: Exploring Synergy, Isoconversional Kinetics, Thermodynamics, and Mechanism." International Journal of Energy Research 2023 (September 19, 2023): 1–18. http://dx.doi.org/10.1155/2023/2140032.

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This study presents the copyrolysis of three biomasses (date pits, cow manure, and coffee waste) and explores the potential of utilizing natural waste catalysts—seashell (SS) and cuttlebone (CB)—to improve the kinetics and thermodynamics of the process. Mixing the feeds led to positive synergistic effects, particularly at a heating rate of 10 K/min or higher. By employing three model-free kinetic methods, the estimated activation energy (Ea) was lower for the ternary feed than the single feeds, and 20 wt.% of the feed with SS and CB catalysts was added. The Ea reduced from 162 kJ/mol for the t

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Bolysbek, A. A., A. Azimov, G. M. Iztleuov, Sh D. Shirinov, and R. Zh Omirova. "Thermodynamic and kinetic parameters of the development of technology for producing complex mineral fertilizers with agrochemical properties using hydrogel." Mechanics and Technologies, no. 4 (December 30, 2024): 253–68. https://doi.org/10.55956/xzza8332.

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This work is devoted in detail to elucidating the thermodynamic and kinetic considerations for the production of mineral fertilizers with a hydrogel consisting of hydrolyzed polyacrylonitrile (HIPAN) in the presence of a cross-linking agent – the product of the reaction of epichlorohydrin with a 33% aqueous ammonia solution (ECHA). Traditional qualitative analysis of individual factors based on kinetic and thermodynamic parameters does not sufficiently reveal the mechanism underlying the absorption of nutrients by hydrogel during the development of mineral fertilizers and the subsequent transf

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G., S. Jha, Prasad D., P. Chaudhry B., and Sanyal S. "Effect of some inhibitors on the corrosion of mild steel in supply water." Journal of Indian Chemical Society Vol. 77, Mar 2000 (2000): 166–67. https://doi.org/10.5281/zenodo.5867535.

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Department of Post-Graduate Studies and Research in Chemistry, Sahibganj College, Sahibganj-816 109, India <em>Manuscript received 16 October 1998, revised 14 September 1999, accepted 23 September 1999</em> Inhibitive effect of various acid anions as corrosion inhibitor for mild steel in supply water has been studied. Molybdate ion is found to be an effective inhibitor under different operating conditions. The inhibitive effect is due to the blocking of the anodic sites of the metal by adsorption which follows Freundlich adsorption isotherm. Activation energy and other thermodynamic parameters

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37

Palepu, Ramamurthy, Joan Oliver, and Brian MacKinnon. "Viscosities and densities of binary liquid mixtures of m-cresol with substituted anilines. Part 3." Canadian Journal of Chemistry 63, no. 5 (1985): 1024–30. http://dx.doi.org/10.1139/v85-174.

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Densities and viscosities were determined for the binary systems of m-cresol with aniline, N-methylaniline, N, N-dimethylaniline, N-ethylaniline, and N, N-diethylaniline at five different temperatures. From the experimental results, the excess volume, excess viscosity, excess molar free energy of activation of flow, excess partial molar volume, and partial molar volumes were calculated. Also various thermodynamic parameters of activation of flow were calculated from the dependence of viscosity on temperature. The deviations from ideality of thermodynamic and transport functions are explained o

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Palmay, Paul, Melissa Mora, Diego Barzallo, and Joan Carles Bruno. "Determination of Thermodynamic Parameters of Polylactic Acid by Thermogravimetry under Pyrolysis Conditions." Applied Sciences 11, no. 21 (2021): 10192. http://dx.doi.org/10.3390/app112110192.

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In the present study, the thermodynamic parameters of Polylactic Acid (PLA) under conditions of thermal degradation were determined. The PLA material, previously sampled and characterized, was analyzed by dynamic thermogravimetry (TG) at heating rates of 5, 10 and 15 °C min−1 with a nitrogen flow of 20 mL min−1 from a temperature of 25 to 900 °C. The data were treated using isoconversional kinetic models to obtain the activation energy and the pre-exponential factor of each model. To fit the DTG curves, the Arrhenius equation was used applying the Contraction Sphere reaction model: two-dimensi

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Hafkenscheid, J. C., and M. Hessels. "Some thermodynamic parameters and temperature-conversion factors for determining alpha-amylase concentration in serum." Clinical Chemistry 34, no. 10 (1988): 2016–18. http://dx.doi.org/10.1093/clinchem/34.10.2016.

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Abstract We measured the relationship between measured activity concentration and temperature for alpha-amylase (EC 3.2.1.1), using 10 different substrates. At 25-37 degrees C the Arrhenius plot was linear. The activation energy ranged from 33.3 kJ.mol-1 with maltoheptaose as substrate to 54.4 kJ.mol-1 with the Blue-Starch method. Activation energy was lowest for substrates having seven glucose moieties, the ones most suitable for determining alpha-amylase--i.e., the presence of more or fewer glycosyl units increased the activation energy. Substrates with blocked groups at the nonreducing end

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Saeed, Rehana, Summyia Masood, and Sundus Khan. "Ionic Interactions of Divalent Transition Metal Sulfate in Aqueous PVOH Systems by Viscosity Method." International Journal of Sciences Volume 2, no. 2013-11 (2013): 83–95. https://doi.org/10.5281/zenodo.3348503.

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Viscosities of divalent transition metal sulfate (MnSO4, CuSO4 and ZnSO4) having concentration ranging from 2x10-2 to 10x10-2 mol dm-3 in aqueous polyvinyl alcohol (PVOH; 0.1 and 0.9 g dL-1) systems were measured at different temperatures from 298 to 318 K with interval of 5 K. The viscosity data were used to evaluate the ion-ion interaction and ion-solvent interactions in terms of A and B coefficients of Jones-Dole equation respectively. The positive value of B coefficient increased with the increase in temperature reveals that salts behave as structure maker in aqueous polyvinyl alcohol syst

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H., Jafar, Kamaluddeen S. Kabo, and Bashir A. "Physicochemical properties, kinetics, and thermodynamics study of oil extraction from pearl millet bran." Journal of Basics and Applied Sciences Research 3, no. 2 (2025): 1–11. https://doi.org/10.4314/jobasr.v3i2.1.

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The increasing demand for edible oils and the need for sustainable waste management have driven research into alternative oil sources such as millet bran. This study focuses on the kinetics and thermodynamics of oil extraction from millet bran using a Soxhlet extractor with n-hexane as the solvent. The maximum oil yield from millet was observed to be 10.78%, 13.23%, and 15.08% at temperatures of 303, 313, and 323 K respectively. The physicochemical properties, including iodine value, ash content, and density, were analyzed alongside FTIR and GC-MS analysis for characterization, confirming the

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de Carvalho-Silva, Jônatas, Milena Fernandes da Silva, Juliana Silva de Lima, Tatiana Souza Porto, Luiz Bezerra de Carvalho, and Attilio Converti. "Thermodynamic and Kinetic Investigation on Aspergillus ficuum Tannase Immobilized in Calcium Alginate Beads and Magnetic Nanoparticles." Catalysts 13, no. 9 (2023): 1304. http://dx.doi.org/10.3390/catal13091304.

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Tannase from Aspergillus ficuum was immobilized by two different techniques for comparison of kinetic and thermodynamic parameters. Tannase was either entrapped in calcium alginate beads or covalently-immobilized onto magnetic diatomaceous earth nanoparticles. When immobilized on nanoparticles, tannase exhibited lower activation energy (15.1 kJ/mol) than when immobilized in alginate beads (31.3 kJ/mol). Surprisingly, the thermal treatment had a positive effect on tannase entrapped in alginate beads since the enzyme became more solvent exposed due to matrix leaching. Accordingly, the proposed m

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Chen, J. P., A. Hazra, and Z. Levin. "Parameterizing ice nucleation rates for cloud modeling using contact angle and activation energy derived from laboratory data." Atmospheric Chemistry and Physics Discussions 8, no. 4 (2008): 14419–65. http://dx.doi.org/10.5194/acpd-8-14419-2008.

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Abstract. The rate of ice nucleation in clouds is not easily determined and large discrepancies exist between model predictions and actual ice crystal concentration measured in clouds. In an effort to improve the parameterization of ice nucleating in cloud models, we investigate the rate of heterogeneous ice nucleation under specific ambient conditions by knowing the sizes as well as two thermodynamic parameters of the ice nuclei – contact angle and activation energy. Laboratory data of freezing and deposition nucleation modes were analyzed to derive inversely the two thermodynamic parameters

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Lei, Jialiu, Yao Wang, Qihui Wang, Shiru Deng, and Yongjun Fu. "Evaluation of Kinetic and Thermodynamic Parameters of Pyrolysis and Combustion Processes for Bamboo Using Thermogravimetric Analysis." Processes 12, no. 11 (2024): 2458. http://dx.doi.org/10.3390/pr12112458.

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As a typical forestry waste, bamboo has gained increasing attention for its potential applications. In order to optimize its valorization, understanding the kinetic and thermodynamic parameters of bamboo pyrolysis and combustion is crucial. In this study, thermogravimetric analysis (TGA) was employed to examine bamboo powder’s pyrolysis and combustion behaviors under different temperature ramps in nitrogen and air environments, and the kinetic and thermodynamic parameters were evaluated using the Flynn–Wall–Ozawa (FWO), Kissinger–Akahira–Sunose (KAS), and Starink (STR) model-free approaches. T

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Solanki, Sneha I., and I. B. Patel. "Study of activation energy and thermodynamic parameters of bismuth sulfide by thermogravimetric analysis." Invertis Journal of Renewable Energy 7, no. 1 (2017): 35. http://dx.doi.org/10.5958/2454-7611.2017.00005.4.

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Tasheva, Stanislava, Milen Dimov, Hafize Fidan, et al. "Thermodynamic and kinetic parameters of biomass from black pine (PINUS NIGRA ARN.)." E3S Web of Conferences 327 (2021): 01014. http://dx.doi.org/10.1051/e3sconf/202132701014.

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The aim of the present study was to determine the thermodynamic and kinetic parameters of biomass obtained from black pine (Pinus nigra Arn.). The biomass, consisting of twigs with needles and needles alone of black pine, was used. Ultimate analysis with the elemental composition of the biomass with respect to the main components such as carbon (C), hydrogen (H), nitrogen (N), and sulfur (S) of the biomass before and after water distillation was made. The high heating value (HHV) and low heating value (LHV), energy density and fuel value index were determined. Thermodynamic (Gibbs energy, enth

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Husaini, Musa. "Corrosion inhibition effect of benzaldehyde (Methoxybenzene) for Aluminium in sulphuric acid solution." Algerian Journal of Engineering and Technology 4 (March 25, 2021): 74–80. https://doi.org/10.5281/zenodo.4636369.

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Corrosion inhibitory effect of benzaldehyde (methoxybenzene) on aluminium in sulphuric acid media was studied by weight loss measurement and characterization was carried by FTIR analysis. From the results it was found that increase in inhibitor concentration lead to the increase in inhibition efficiency and decreases when the temperature increased. Plots of ln (wi - Δw) against time gave a linear graphs which confirmed a first order reaction mechanism for aluminium in inhibited and uninhibited acid solution. The activation energy value of uninhibited acid solution was found to be 36.39 k

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Zhao, Xia, Yi-Lin Hou, Jun Yang, et al. "Establishing Thermodynamic Graphs of Nitrogenous Radical Cations Abstracting Hydrogen Atoms and Their Applications in Photoredox Reactions." Molecules 30, no. 3 (2025): 435. https://doi.org/10.3390/molecules30030435.

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Nitrogenous compounds have been extensively utilized as hydrogen atom transfer (HAT) catalysts in photoredox reactions, with nitrogenous radical cations being the actual hydrogen atom abstractors. Building upon our previous work, 120 thermodynamic graphs of nitrogenous radical cations abstracting hydrogen atoms, which encompass seven vital thermodynamic parameters, are designed and established to elucidate their redox characteristics. Furthermore, the applications of thermodynamic graphs to select appropriate photocatalysts, assess the feasibility of the HAT process, and diagnose the possible

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Das, Tandra, A. K. Datta, and A. K. Ghosh. "Kinetic and Mechanistic Studies on the Reaction of DL-Methionine with in Aqueous Medium at Physiological pH." Research Letters in Inorganic Chemistry 2009 (April 16, 2009): 1–5. http://dx.doi.org/10.1155/2009/314672.

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The reaction has been studied spectrophotometrically; the reaction shows two steps, both of which are dependent on ligand concentration and show a limiting nature. An associative interchange mechanism is proposed. Kinetic and activation parameters ( and ) and (, , , and ) have been calculated. From the temperature dependence of the outer sphere association equilibrium constant, thermodynamic parameters ( and ; and ) have also been calculated.

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Ponomareva, P. A., O. N. Kanygina, and E. V. Salnikova. "Thermodynamic and kinetic parameters of iodine extraction from chloride aqueous solutions." Proceedings of Universities. Applied Chemistry and Biotechnology 12, no. 2 (2022): 222–30. http://dx.doi.org/10.21285/2227-2925-2022-12-2-222-230.

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Extraction is a versatile and relatively simple method for extracting rare and scattered elements, producing good results at minimal expenses in terms of reagents and equipment. Information about the thermal effects and kinetic dependencies of the extraction process is essential for predicting and counteracting fluctuations in external conditions. In this work, the thermodynamic and kinetic parameters of the iodine extraction process were studied using model solutions that contained sodium chloride with an ionic strength of 0–5 mol/l as a background mineralization. This composition closely cor

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