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Journal articles on the topic 'Redox Reaction and Slow Learners'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

ABDULMALIK, SABITU, and TERVER FRANCIS TORPEV. "Impact of Class-Wide Peer-Tutoring Strategy on Secondary School Slow Learners' Performance in Redox Reactions in Funtua, Katsina StateNigeria." Issues and Ideas in Education 4, no. 2 (2016): 83–97. https://doi.org/10.15415/iie.2016.42007.

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The performance of senior secondary school students in chemistry has been very poor over the years in Nigeria. Teachers’ use of inappropriate instructional strategies and students varied abilities has been identified responsible for this problem. This study examined the impact of Class-Wide Peer-Tutoring Strategy on secondary school slow learners’ performance in redox reactions in Funtua Education Zone, Katsina State, Nigeria. Quasi– experimental design was adopted for the study. The study involved a population of 977 SS2 Students. A of sample of 108 slow learners drawn from two secondary scho

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SABITU, ABDULMALIK, and TORPEV TERVER FRANCIS. "Impact of Class-Wide Peer-Tutoring Strategy on Secondary School Slow Learners’ Performance in Redox Reactions in Funtua, Katsina StateNigeria." Issues and Ideas in Education 4, no. 2 (2016): 83–97. http://dx.doi.org/10.15415/iie.2016.42007.

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3

Thu Pham, Hien Thi, Changshin Jo, Jinwoo Lee, and Yongchai Kwon. "MoO2 nanocrystals interconnected on mesocellular carbon foam as a powerful catalyst for vanadium redox flow battery." RSC Advances 6, no. 21 (2016): 17574–82. http://dx.doi.org/10.1039/c5ra24626a.

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MoO<sub>2</sub> nanocrystals on mesocellular carbon foam are used for a high performance vanadium redox flow battery. This improves the slow reaction of the VO<sup>2+</sup>/VO<sup>2+</sup> redox couple, inducing high efficiencies with high specific capacity.

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Ayina, Bouni1* Emmanuel Mouliom Ndam2 Hippolyte Ntede Nga3 Mohamed Soudani4. "Study of the level of understanding of the student-teachers of physical sciences of the higher teacher training college of Yaounde on the notion of oxidation-reduction reaction in an acid medium." ISRG Journal of Arts Humanities & Social Sciences (ISRGJAHSS) II, no. I (2024): 154–60. https://doi.org/10.5281/zenodo.10633351.

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<em>This research aims to explore the level of understanding of future teachers of physical sciences on the nature of charge carriers exchanged when the oxidation-reduction reaction takes place in an acid medium and to identify the types of reasoning that led to the answers they propose. This is in order to know if they have the cognitive resources necessary to approach with their future learners the concept of redox reaction according to the reaction medium. To do this, 585 student-teachers of physical sciences (physics and chemistry) from the first and second cycles of the higher teacher tra

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5

Ševčík, P., D. Mišicák, and L’ Adamčíková. "Carbon dioxide production in the oscillating Belousov—Zhabotinsky reaction with oxalic acid." Chemical Papers 60, no. 1 (2006): 1–4. http://dx.doi.org/10.2478/s11696-006-0001-4.

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AbstractA new volumetric method for monitoring the oscillating Belousov—Zhabotinsky reaction with oxalic acid is described. While an oscillatory behavior in the potential of the Pt redox electrode at slow stirring without inert gas bubbling can be observed, a monotonous, nonoscillatory course was found both at the slow and rapid stirring rates for the carbon dioxide evolution. Possible reasons for such observations are discussed.

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Hideg, Éva, and Sándor Demeter. "Binary Oscillation of Delayed Luminescence: Evidence of the Participation of QB- in the Charge Recombination." Zeitschrift für Naturforschung C 40, no. 11-12 (1985): 827–31. http://dx.doi.org/10.1515/znc-1985-11-1212.

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Abstract The flash-induced oscillation of a slowly decaying component of delayed luminescence (half time ~ 42 s) was investigated in spinach chloroplasts for various redox states of the secondary acceptor pool (QB). In preilluminated chloroplasts (30 s light followed by 5 min dark) the slow component exhibited a period-4 oscillation as a function of flash number. Upon oxidation of a major part of the QB pool by dark-adaptation or by ferricyanide treatment of chloroplasts, the period-4 oscillation was converted into a period-2 oscillation, providing direct experimental evi dence of the partici

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Chen, Hao. "Study on Preparation of Slow-release Polycarboxylate Superplasticizer by Macromonomer EPEG at Room Temperature." Journal of Physics: Conference Series 2539, no. 1 (2023): 012041. http://dx.doi.org/10.1088/1742-6596/2539/1/012041.

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Abstract Slow-release polycarboxylate superplasticizer was synthetic under room-temperature conditions, a free radical copolymerization reaction occurred under the action of a redox initiator, and the optimal preparation process and temperature effect were discussed in detail. The results show that the best preparation process (EP-15) is: acid-to-ether ratio is 1.89, the amount of NaH2PO2 is 2.27%, the appropriate reaction temperature is 15-25°C, and the suitable macromonomer is EPEG-3000 of OXIRANCHEM. Tests have verified that compared to a commercially available slow-release polycarboxylate

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Br Tarigan, Endah Putri, and Gulmah Sugiharti. "Development of Guided Inquiry-Based Learner Worksheets to Improve Higher Level Thinking Skills of Learners on Redox Reaction Material." Jurnal Teknologi Pendidikan : Jurnal Penelitian dan Pengembangan Pembelajaran 9, no. 2 (2024): 301. http://dx.doi.org/10.33394/jtp.v9i2.11188.

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This research aims to: (1) knowing the level of need for guided inquiry-based Learner Worksheets (LKPD) at Imelda Medan Private High School. (2) to know the design of LKPD based on guided inquiry on redox material. (3) knowing the feasibility of LKPD according to BSNP standards. (4) knowing the improvement of students' higher-level thinking skills and. (5) knowing the students' response to the guided inquiry-based LKPD on redox reaction material that has been developed. This development was carried out using the R&D method with the 4D development model (Define, Design, Develop, Disseminate

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Kweon, Hyunji, Myungeun Choi, and Jongsoon Kim. "Improved Fast-Discharging Performance and Cyclability of Oxygen-Redox-Based P3-Type Na-Layered Cathode via Vacancies in Transition Metal Layers." ECS Meeting Abstracts MA2025-01, no. 2 (2025): 116. https://doi.org/10.1149/ma2025-012116mtgabs.

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The anionic redox reaction is suggested as a promising strategy for improving the energy density of layered oxide cathodes for Na-ion batteries. However, anionic-redox-based cathode materials often encounter challenges such as slow reaction kinetics and structural deteriorization during repeated charge/discharge processes, which degrade their electrochemical performance. In this study, we introduce vacancies(□) within the transition metal layers of P3-type Mn-based layered oxides, Na0.56[Ni0.1Mn0.81□0.09]O2, to induce oxygen redox reactions and improve structural resilience. These vacancies ac

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Kim, Dooyoung, and Thomas S. Teets. "Strategies for accessing photosensitizers with extreme redox potentials." Chemical Physics Reviews 3, no. 2 (2022): 021302. http://dx.doi.org/10.1063/5.0084554.

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Photoredox catalysis has been prominent in many applications, including solar fuels, organic synthesis, and polymer chemistry. Photocatalytic activity directly depends on the photophysical and electrochemical properties of photocatalysts in both the ground state and excited state. Controlling those properties, therefore, is imperative to achieve the desired photocatalytic activity. Redox potential is one important factor that impacts both the thermodynamic and kinetic aspects of key elementary steps in photoredox catalysis. In many challenging reactions in organic synthesis, high redox potenti

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Gulaboski, Rubin, and Valentin Mirceski. "Surface catalytic mechanism-theoretical study under conditions of differential square-wave voltammetry." Macedonian Journal of Chemistry and Chemical Engineering 41, no. 1 (2022): 1–10. http://dx.doi.org/10.20450/mjcce.2022.2404.

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Differential square-wave voltammetry (DSWV) is the most recent modification of square-wave voltammetry (SWV) developed for advancing the performances of the technique for both analytical and kinetics applications. The differential current-measuring protocol in DSWV leads to improved voltammetric features of the forward and backward current components, in particular when slow i.e., quasireversible or irreversible electrode reactions are studied. In the present theoretical work catalytic electrode mechanism of surface bounded redox species (surface EC’ mechanism) is studied under conditions of t

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Thabaj, K. A., S. A. Chimatadar, and S. T. Nandibewoor. "Oxidation of Tyrosine by Hexacyanoferrate(III) in Aqueous Ethanoic Acid Medium–A Kinetic and Mechanistic Study." Progress in Reaction Kinetics and Mechanism 33, no. 4 (2008): 331–48. http://dx.doi.org/10.3184/146867808x372613.

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The kinetics of oxidation of tyrosine by Fe(CN)63- have been studied in 40% AcOH-H2O containing 4.0 mol dm-3 HCl. The oxidation is made possible by varying the difference in redox potential by adding HCl and AcOH to the reaction mixture. The reaction is first order with respect to [Fe(CN)63- and fractional (0.72) order with respect to [tyrosine]. Increasing the acid concentration at constant chloride concentration accelerates the reaction. The order with respect to acid concentration is nearly two and H2Fe(CN)6- is regarded as the active oxidant. The initially formed product, Fe(CN)64- retards

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Jin, Song. "(Invited) Modular Electrochemical Synthesis to Exploit Dynamic Electricity Markets and Recover Ammonia Electrochemically." ECS Meeting Abstracts MA2024-02, no. 59 (2024): 3962. https://doi.org/10.1149/ma2024-02593962mtgabs.

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Decarbonizing the power grid requires the widespread adoption of renewable (wind/solar) power sources but the unpredictable and intermittent nature of renewable power presents a grand challenge. This motivates the development of flexible electrochemical manufacturing technologies that can shift power demand/supply across space-time and scales. I will discuss new modular electrochemical synthesis strategies capable of providing demand flexibility at different timescales by participating in multiple electricity markets (day-ahead, real-time, and frequency regulation). Using a fast proton redox m

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14

Zhao, Ying, Xin Zuo, Shuang Liu, Wenjun Qian, Xuewen Tang, and Jun Lu. "A Fluorescent Probe to Detect Quick Disulfide Reductase Activity in Bacteria." Antioxidants 11, no. 2 (2022): 377. http://dx.doi.org/10.3390/antiox11020377.

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The Trx and Grx systems, two disulfide reductase systems, play critical roles in various cell activities. There are great differences between the thiol redox systems in prokaryotes and mammals. Though fluorescent probes have been widely used to detect these systems in mammalian cells. Very few methods are available to detect rapid changes in the redox systems of prokaryotes. Here we investigated whether Fast-TRFS, a disulfide-containing fluorescent probe utilized in analysis of mammalian thioredoxin reductase, could be used to detect cellular disulfide reducibility in bacteria. Fast-TRFS exhib

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Yang, Bin, Zengyue Wang, Wanwan Wang, and Yi-Chun Lu. "A Low-Crossover and Fast-Kinetics Thiolate Negolyte for Aqueous Redox Flow Batteries." Energy Material Advances 2022 (January 4, 2022): 1–11. http://dx.doi.org/10.34133/2022/9795675.

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Aqueous redox flow batteries (ARFBs) are a promising technology for large-scale energy storage. Developing high-capacity and long-cycle negolyte materials is one of major challenges for practical ARFBs. Inorganic polysulfide is promising for ARFBs owing to its low cost and high solubility. However, it suffers from severe crossover resulting in low coulombic efficiency and limited lifespan. Organosulfides are more resistant to crossover than polysulfides owing to their bulky structures, but they suffer from slow reaction kinetics. Herein, we report a thiolate negolyte prepared by an exchange re

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Hsu, Wei-Lun, Yun-Li Ma, Yan-Chu Chen, Yen-Chen Liu, Kuang-Min Cheng, and Eminy H. Y. Lee. "Identification of Ndfip1 as a novel negative regulator for spatial memory formation associated with increased ubiquitination of Beclin 1 and PTEN." PLOS ONE 18, no. 4 (2023): e0283908. http://dx.doi.org/10.1371/journal.pone.0283908.

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Long-term memory formation requires de novo RNA and protein synthesis. By using the differential display-polymerase chain reaction strategy, we have presently identified the Nedd4 family interacting protein 1 (Ndfip1) cDNA fragment that is differentially expressed between the slow learners and the fast learners from the water maze learning task in rats. Further, the fast learners show decreased Ndfip1 mRNA and protein expression levels than the slow learners. Spatial training similarly decreases the Ndfip1 mRNA and protein expression levels. Conversely, the Ndfip1 conditional heterozygous (cHe

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17

del Olmo, Marta, Achim Kramer, and Hanspeter Herzel. "A Robust Model for Circadian Redox Oscillations." International Journal of Molecular Sciences 20, no. 9 (2019): 2368. http://dx.doi.org/10.3390/ijms20092368.

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The circadian clock is an endogenous oscillator that controls daily rhythms in metabolism, physiology, and behavior. Although the timekeeping components differ among species, a common design principle is a transcription-translation negative feedback loop. However, it is becoming clear that other mechanisms can contribute to the generation of 24 h rhythms. Peroxiredoxins (Prxs) exhibit 24 h rhythms in their redox state in all kingdoms of life. In mammalian adrenal gland, heart and brown adipose tissue, such rhythms are generated as a result of an inactivating hyperoxidation reaction that is red

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18

Shaw III, G. Frank, Sabine Schraa, Ernst Gleichmann, Yash Paul Grover, Lothar Dunemann, and Annapurna Jagarlamudi. "Redox Chemistry and [Au(CN)2-] in the Formation of Gold Metabolites." Metal-Based Drugs 1, no. 5-6 (1994): 351–62. http://dx.doi.org/10.1155/mbd.1994.351.

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The role of hypochlorite ion, which can be generated by the enzyme myleoperoxidase, in the biochemistry of gold(I) anti-arthritic drugs was investigated. Sodium hypochlorite (OCl−) directly and rapidly oxidizes AuSTm, Au(CN)2-, AuSTg (gold thioglucose) and auranofin (Et3PAuSATg). The resulting gold(III) species were detected by an Ion Chromotography Ion-Pairing technique that was developed to distinguish gold(I) and gold(III). Formation of Au(III) was also demonstrated spectrophotometrically after the conversion to AuCl4−. The reactions of AuSTm, AuSTg, and auranofin are complex and gold(III)

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Le Gal, Alex, Marielle Vallès, Anne Julbe, and Stéphane Abanades. "Thermochemical Properties of High Entropy Oxides Used as Redox-Active Materials in Two-Step Solar Fuel Production Cycles." Catalysts 12, no. 10 (2022): 1116. http://dx.doi.org/10.3390/catal12101116.

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The main challenges and obstacles to the development of hydrogen/carbon monoxide production from the splitting of water/carbon dioxide through two-step solar thermochemical cycles are strongly related to material concerns. Indeed, ceria is the main benchmark redox material used in such processes because it provides very good oxidation reaction kinetics, reactions reversibility and thermal cycling stability. This is at the expense of a low reduction yield (non-stoichiometry δ in CeO2-δ) at relatively high temperatures (≥1400 °C), which requires operation at low oxygen partial pressures during t

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Pacławski, K., and J. Piwowonska. "Kinetics and Mechanism of the Redox Reaction Between Pt(IV) Chloride Complex Ions and Sodium Thiosulfate in Aqueous Solution. Part I: Acidic Solution/ Kinetyka I Mechanizm Reakcji Redox Pomiędzy Chlorkowymi Jonami Kompleksowymi Pt(Iv) I Tiosiarczanem Sodu W Roztworach Wodnych. Część I: Roztwór Kwaśny." Archives of Metallurgy and Materials 59, no. 4 (2014): 1413–20. http://dx.doi.org/10.2478/amm-2014-0241.

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Abstract In this work, spectrophotometric studies of the kinetics and mechanism of reaction between [PtCl6]2- complex ions and sodium thiosulfate, were carried out. The influence of different conditions, such as: initial concentrations of reductant and platinum(IV) complex ions, ionic strength, pH and temperature on the rate constant, was experimentally determined. From the obtained results, the molecularity of the first elementary step, value of the enthalpy and entropy of activation in Eyring equation as well as corresponding rate equation, were experimentally determined. It was found that t

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Tao, Bo, and Zongning Yin. "Redox-Responsive Coordination Polymers of Dopamine-Modified Hyaluronic Acid with Copper and 6-Mercaptopurine for Targeted Drug Delivery and Improvement of Anticancer Activity against Cancer Cells." Polymers 12, no. 5 (2020): 1132. http://dx.doi.org/10.3390/polym12051132.

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Dopamine-modified hyaluronic acid (HA-DOP) was chosen as the drug carrier in this study, and Cu2+ was selected from among Cu2+, Zn2+, Fe2+, and Ca2+ as the central atom. 6-Mercaptopurine (6-MP) was conjugated with HA through a coordination reaction. HA-DOP-copper-MP (HA-DOP-Cu-MP), a redox-responsive coordination polymer prodrug, was prepared. The drug loading was 49.5 mg/g, the encapsulation efficiency was 70.18%, and the particle size was 173.5 nm. HA-DOP-Cu-MP released rapidly in the release medium containing reduced glutathione (GSH), and the accumulated release exceeded 94% in 2 h. In the

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Dolphijn, Guillaume, Fernand Gauthy, Alexandru Vlad, and Jean-François Gohy. "High Power Cathodes from Poly(2,2,6,6-Tetramethyl-1-Piperidinyloxy Methacrylate)/Li(NixMnyCoz)O2 Hybrid Composites." Polymers 13, no. 6 (2021): 986. http://dx.doi.org/10.3390/polym13060986.

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Lithium-ion batteries are today among the most efficient devices for electrochemical energy storage. However, an improvement of their performance is required to address the challenges of modern grid management, portable technology, and electric mobility. One of the most important limitations to solve is the slow kinetics of redox reactions associated to inorganic cathodic materials, directly impacting on the charging time and the power characteristics of the cells. In sharp contrast, redox polymers such as poly(2,2,6,6-tetramethyl-1-piperidinyloxy methacrylate) (PTMA) exhibit fast redox reacti

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Park, Chansun, Jiajun Chen, Alvaro Masias, and Jason R. Croy. "Temperature-Sensitive Electrochemical Behavior of Co-Free Li- and Mn-Rich Layered Oxide Cathodes." ECS Meeting Abstracts MA2025-01, no. 3 (2025): 178. https://doi.org/10.1149/ma2025-013178mtgabs.

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Lithium- and manganese-rich (LMR) oxides have attracted considerable attention as cathode materials for battery applications, primarily due to their high energy density, cost-effectiveness, and reduced content of nickel and cobalt in comparison to traditional NCM materials1,2. Despite these potential benefits, implementation of LMR cathode materials is impeded by several challenges, including a large voltage hysteresis3, slow kinetics4, and gradual voltage degradation5. These issues are concomitant with anionic redox activity and cation migration leading to a disordered, low-voltage phase. In

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El Kasri, Amina, Mohammed Abid, Ali Ouasri, and Ahmed Lebkiri. "IDENTIFICATION OF PROBLEM-SOLVING DIFFICULTIES OF MOROCCAN PUPILS AND TRAINEE TEACHERS IN LEARNING THE REDOX REACTION CONCEPTS: ELECTROLYSIS CASE." Journal of Southwest Jiaotong University 57, no. 4 (2022): 80–92. http://dx.doi.org/10.35741/issn.0258-2724.57.4.7.

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The present study aims to identify and compare difficulties in the acquisition of the knowledge and skills for solving electrolysis redox reactions encountered by Moroccan second-year baccalaureate (high school) students (novices in electrolysis problem-solving) and by trainee teachers of physics and chemistry (experts in electrolysis problem solving) at the Regional Center of Education and Training Professions in Rabat. The students and trainee teachers were asked to answer explicit and implicit questions; these questions were classified as simple or complex. Moroccan learners demonstrated ma

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Pacławski, K., and J. Piwowonska. "Kinetics and Mechanism of the Redox Reaction Between Pt(IV) Complex Ions and Sodium Thiosulfate in Aqueous Solution. Part II: Neutral and Alkaline Solution/ Kinetyka I Mechanizm Reakcji Redoks Pomiędzy Jonami Kompleksowymi Pt(Iv) I Tiosiarczanem Sodu W Roztworze Wodnym. Część II: Roztwór Obojętny I Zasadowy." Archives of Metallurgy and Materials 59, no. 4 (2014): 1421–26. http://dx.doi.org/10.2478/amm-2014-0242.

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Abstract In this work, spectrophotometric studies on the kinetics and mechanism of the reaction between [PtCl6]2- complex ions and sodium thiosulfate, in neutral (pH = 7) and alkaline (p = 12) solution, were carried out. Applying different conditions, the influence of initial concentrations of reductant and platinum(IV) complex ions as well as the influence of temperature and ionic strength on the rate constant, was experimentally determined. From the obtained results, the molecularity, the order and the value of enthalpy and entropy of activation of the reaction, were experimentally determine

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Thote, Prashant, and Gowri S. "OUTCOME BASED LEARNING: A PANACEA FOR QUALITY EDUCATION." International Journal of Research -GRANTHAALAYAH 9, no. 5 (2021): 8–23. http://dx.doi.org/10.29121/granthaalayah.v9.i5.2021.3909.

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The curriculum framework asserts learner to debate, dissent form individual opinion on ideas, systems, practices by nurturing skills to think and reason independently. Participatory learning activity is envisioned as a process whereby learners construct concept through assimilation, absorption, interaction and reflection. In the present paper experiential learning activity are designed to ensure that the students are encouraged to seek out knowledge from their hands-on activity than the text book in their own experiences. In the present paper attempt is made to investigate the impact of conven

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Quinn, Alexander H., Gerardo Maria Pagano, and Fikile R. Brushett. "Reference-Electrode Equipped Redox Flow Cells Enable Single-Electrode Characterization of the Polysulfide Redox Couple." ECS Meeting Abstracts MA2025-01, no. 45 (2025): 2399. https://doi.org/10.1149/ma2025-01452399mtgabs.

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Alkaline polysulfide solutions are attractive as negative electrolytes in redox flow batteries (RFBs) due to the low cost and abundance of sulfur, and the high aqueous solubility of polysulfide species. However, polysulfide redox reactions are relatively slow as compared to many common RFB couples, motivating studies of different catalytic materials and their incorporation into form factors suitable for application in flow cell systems. While prior art suggests that metal-sulfide catalysts (e.g., CoSx and NiSx) are significantly better than carbon surfaces,1 comparisons are frustrated by diffe

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Calabrese, L., and M. Carbonaro. "An e.p.r. study of the non-equivalence of the copper sites of caeruloplasmin." Biochemical Journal 238, no. 1 (1986): 291–95. http://dx.doi.org/10.1042/bj2380291.

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The two Type 1 (blue) copper-binding sites of caeruloplasmin were spectroscopically differentiated by the kinetic analysis of the e.p.r. spectra during the redox cycle. One blue copper, with a hyperfine splitting constant (A parallel) of 6.8 mT, which was rapidly reduced, was not reoxidized by oxygen, whereas it was reoxidized by H2O2. The other blue copper (A parallel = 5.8 mT), which was reduced slowly, was rapidly reoxidized by either oxygen or H2O2. A conformational change of the Type 2 copper was concomitant with the fast reduction of Type 1 copper, whereas its reduction occurred during t

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Blackmore, R. S., T. Brittain, and C. Greenwood. "An analysis of the reaction kinetics of the hexahaem nitrite reductase of the anaerobic rumen bacterium Wolinella succinogenes." Biochemical Journal 271, no. 2 (1990): 457–61. http://dx.doi.org/10.1042/bj2710457.

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The reduction kinetics of both the resting and redox-cycled forms of the nitrite reductase from the anaerobic rumen bacterium Wolinella succinogenes were studied by stopped-flow reaction techniques. Single-turnover reduction of the enzyme by dithionite occurs in two kinetic phases for both forms of the enzyme. When the resting form of the enzyme is subjected to a single-turnover reduction by dithionite, the slower of the two kinetic phases exhibits a hyperbolic dependence of the rate constant on the square root of the reductant concentration, the limiting value of which (approximately 4 s-1) i

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Samukaite Bubniene, Urte, Sarunas Zukauskas, Vilma Ratautaite, et al. "Assessment of Cytochrome c and Chlorophyll a as Natural Redox Mediators for Enzymatic Biofuel Cells Powered by Glucose." Energies 15, no. 18 (2022): 6838. http://dx.doi.org/10.3390/en15186838.

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The development of new high-power biofuel cells has been limited in the past by slow or indirect charge transfer. In this study, enzymatic biofuel cell (EBFC) systems were explored with different materials used to evaluate their applicability as redox mediators. Redox mediators of different natures have been selected for this research. Cytochrome c, Chlorophyll a, and supernatant of ultrasonically disrupted algae Chlorella vulgaris cells were examined as potential redox mediators. The effect of heparin on the EBFC was also evaluated under the same analytical conditions. The measurements of ope

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Jacob, C., J. R. Lancaster, and G. I. Giles. "Reactive sulphur species in oxidative signal transduction." Biochemical Society Transactions 32, no. 6 (2004): 1015–17. http://dx.doi.org/10.1042/bst0321015.

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Intense interest has been generated by the discovery that reactive oxygen species can function as intracellular second messengers. Reactive oxygen species have been implicated in diverse cellular processes, including growth factor signal transduction, gene expression and apoptosis. Additionally, there is evidence for proteins that are regulated by redox environment through the reversible oxidation of their cysteine residues. However, the direct reaction of reactive oxygen species with cysteine at physiological concentrations is generally a slow process, suggesting that intermediates are requir

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Kim, D. H., W. J. Kim, H. S. Kim, K. S. Han, T. Tran, and M. J. Kim. "Galvanic enhancement for high pressure leaching of chalcopyrite." Journal of Mining and Metallurgy, Section B: Metallurgy 52, no. 2 (2016): 119–26. http://dx.doi.org/10.2298/jmmb150723022k.

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This study was conducted to evaluate the galvanic enhancement of the pressure oxidation (POX) leaching of a chalcopyrite/chalcocite concentrate, which is believed to take place via a redox reaction. Cu recoveries of >90% could be achieved during POX leaching of this chalcopyrite/chalcocite concentrate at 200?C and 0.7 MPa initial oxygen pressure within 2h in a pressure reactor lined with titanium, which were 18-28% higher than for the same leaching using the teflon liner. A slow heating time seems to produce more sulphur coating, reducing the leaching performance, yielding much lower Cu rec

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Thote, Prashant, and Gowri S. "OUTCOME BASED LEARNING: THE EFFECT OF EXPERIENTIAL LEARNING ACTIVITIES ON THE ATTAINMENT OF SPECIFIC LEARNING OUTCOME AMONG SENIOR SECONDARY SCHOOL STUDENTS." International Journal of Research -GRANTHAALAYAH 9, no. 3 (2021): 321–30. http://dx.doi.org/10.29121/granthaalayah.v9.i3.2021.3824.

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Experiential learning activity is a group activity in which the role of an individual is well defined and central focus is on the process and not the outcome. Its process, steps, as well as the content involves active participation of both learners and teachers to attain intended specific learning outcome. In this present paper efforts are made to investigate the impact of experiential learning activity in germinating interests among the students in Chemistry and also to study the co-relation between the interest in studying Chemistry and their academic achievement. The study is conducted duri

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Thote, Prashant, and Gowri S. "OUTCOME BASED LEARNING: THE EFFECT OF EXPERIENTIAL LEARNING ACTIVITIES ON THE ATTAINMENT OF SPECIFIC LEARNING OUTCOME AMONG SENIOR SECONDARY SCHOOL STUDENTS." International Journal of Research -GRANTHAALAYAH 9, no. 4 (2021): 28–42. http://dx.doi.org/10.29121/granthaalayah.v9.i4.2021.3824.

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Experiential learning activity is a group activity in which the role of an individual is well defined and central focus is on the process and not the outcome. Its process, steps, as well as the content involves active participation of both learners and teachers to attain intended specific learning outcome. In this present paper efforts are made to investigate the impact of experiential learning activity in germinating interests among the students in Chemistry and also to study the co-relation between the interest in studying Chemistry and their academic achievement. The study is conducted duri

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Cherkupally, Sanjeeva Reddy. "Mechanism and evaluation of individual kinetic and thermodynamic parameters of acid bromate-lactic acid redox reaction." Journal of Indian Chemical Society Vol. 84, Jun 2007 (2007): 548–53. https://doi.org/10.5281/zenodo.5820611.

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Department of Chemistry, Kakatiya University, Warangal-506 009, Andhra Pradesh, India <em>E-mail</em> : chsrkuc@yahoo.co.in <em>Manuscript received 24 July 2006, revised 2 February 2007, accepted 28 March 2007</em> Kinetic investigations on the bromate-lactic acid redox reaction in aqueous perchloric acid medium have been carried out under varying conditions. The redox reaction exhibits first-order each in [bromate] and [lactic acid] and 1.6 order in [mineral acid]. Primary kinetic isotope effect (<em>K</em><sub>H</sub>/k<sub>D</sub> = 1) has been found to be absent. However, an inverse s

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Toledo, Carla N., Fábio H. Florenzano, and José M. Schneedorf. "Electron Transfer of Myoglobin Immobilized in Au Electrodes Modified with a RAFT PMMA-Block-PDMAEMA Polymer." International Journal of Electrochemistry 2014 (2014): 1–7. http://dx.doi.org/10.1155/2014/184206.

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Myoglobin was immobilized with poly(methyl methacrylate)-block-poly[(2-dimethylamino)ethyl methacrylate]PMMA-block-PDMAEMA polymer synthesized by reversible addition-fragmentation chain transfer technique (RAFT). Cyclic voltammograms gave direct and slow quasireversible heterogeneous electron transfer kinetics between Mb-PMMA-block-PDMAEMA modified electrode and the redox center of the protein. The values for electron rate constant (Ks) and transfer coefficient (α) were0.055±0.01·s−1and0.81±0.08, respectively. The reduction potential determined as a function of temperature (293–328 K) revealed

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Kim, Kitae. "Redox Chemical Transformation of Organic and Inorganic Compounds in Frozen State - Intrinsic Electron Transfer Processes in Ice." ECS Meeting Abstracts MA2024-02, no. 49 (2024): 3513. https://doi.org/10.1149/ma2024-02493513mtgabs.

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Ice is one of the most abundant substances on Earth. However, little research has been done on ice as a medium for chemical reactions. Most of chemical reactions take place slowly when temperature drops based on Arrhenius Equation (k=A·e-EA/RT). However, it has been found that several chemical processes markedly accelerated in ice phase. For example, Takenaka et. al. reported that the NO2 - oxidation to NO3 - in the presence of O2 which is very slow reaction in aqueous solution was markedly accelerated (appx. 105 times) by freezing. The enhanced chemical transformation is attributed to the Fre

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Brunner, Philipp, Eva-Maria Steyskal, Stefan Topolovec, and Roland Würschum. "Positronium chemistry of a Fe^2+/3+ solution under electrochemical control." Journal of Chemical Physics 157, no. 23 (2022): 234202. http://dx.doi.org/10.1063/5.0129255.

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The positronium chemistry of a Fe2+/3+ solution is studied under full electrochemical control. For this novel approach to positronium electrochemistry, a suitable cell setup is used, which allows simultaneously both electrochemical measurements and positron annihilation spectroscopy. For the Fe2+/3+ redox couple, positronium serves as an ideally suited atomic probe owing to the rather different positronium chemistry of Fe2+ (spin conversion) and Fe3+ (total positronium inhibition and oxidation). This enabled the precise in situ monitoring of oxidation and reduction by means of positron lifetim

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Luo, Kaikai, Qilong Zheng, Yi Yu, et al. "Urea-Assisted Sol-Gel Synthesis of LaMnO3 Perovskite with Accelerated Catalytic Activity for Application in Zn-Air Battery." Batteries 9, no. 2 (2023): 90. http://dx.doi.org/10.3390/batteries9020090.

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Precious metal-based materials such as commercial Pt/C are available electrocatalysts for redox reactions in Zn-air batteries. However, their commercial use is still limited by slow kinetics and restricted stability. In this work, we highlight a facial urea-assisted sol-gel method to synthesize A-site vacancy in LaMnO3+δ oxide for boosting its catalytic activity and further explore the effect of the amount of urea on the A-site LaMnO3. The A-site vacancy in LMO was confirmed by XRD, TEM, and XPS, which revealed that the urea-assisted sol-gel method mitigated the A-site vacancy in LaMnO3+δ and

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FRÉBORTOVÁ, Jitka, Marco W. FRAAIJE, Petr GALUSZKA, et al. "Catalytic reaction of cytokinin dehydrogenase: preference for quinones as electron acceptors." Biochemical Journal 380, no. 1 (2004): 121–30. http://dx.doi.org/10.1042/bj20031813.

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The catalytic reaction of cytokinin oxidase/dehydrogenase (EC 1.5.99.12) was studied in detail using the recombinant flavoenzyme from maize. Determination of the redox potential of the covalently linked flavin cofactor revealed a relatively high potential dictating the type of electron acceptor that can be used by the enzyme. Using 2,6-dichlorophenol indophenol, 2,3-dimethoxy-5-methyl-1,4-benzoquinone or 1,4-naphthoquinone as electron acceptor, turnover rates with N6-(2-isopentenyl)adenine of approx. 150 s−1 could be obtained. This suggests that the natural electron acceptor of the enzyme is q

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Range, Klaus-Jürgen, Reinhard Zintl, and Anton M. Heyns. "The Thermal Decomposition of Ammonium Metavanadate(V) in Open and Closed Systems." Zeitschrift für Naturforschung B 43, no. 3 (1988): 309–17. http://dx.doi.org/10.1515/znb-1988-0313.

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The thermal decomposition of ammonium metavanadate(V) has been studied at atmospheric pressure, at hydrothermal, and high-pressure conditions, respectively. In a closed high-pressure system a redox reaction between vanadium(V) and ammonia takes place, to yield with increasing temperature the compounds (NH4)2V6O12(OH)2, VO2-δ(OH)δ, and V2nO2n-1 the composition of the product eventually approaching V2O3 at 1100 °C. All these compounds can easily be converted into V2O5 by heating in air. The mid-infrared spectra of the decomposition products obtained by slow heating of NH4VO3 in air, are virtuall

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Sahli, Rihab, Janet Bahri, Issa Tapsoba, Khaled Boujlel, and Noureddine Raouafi. "Solvent Effects on the Electrochemical Behavior of TAPD-Based Redox-Responsive Probes for Cadmium(II)." International Journal of Electrochemistry 2014 (2014): 1–9. http://dx.doi.org/10.1155/2014/305721.

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Two tetralkylated phenylenediamines (TAPD)1and2have been prepared by reductive alkylation ofpara-dimethylaminoaniline with furfural or thiophene 2-carboxaldehyde, respectively. Their chelation ability has been evaluated as electrochemical guest-responsive chemosensors for Cd(II) in acetonitrile (ACN), dimethylformamide (DMF), propylene carbonate (PC), and nitromethane (NM). The voltamperometric studies showed that these compounds are able to bind the Cd(II) cation with strong affinities except in DMF. The redox features of the chemosensors changed drastically when they are bounded to Cd(II) to

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Barber, J., and J. De Las Rivas. "A functional model for the role of cytochrome b559 in the protection against donor and acceptor side photoinhibition." Proceedings of the National Academy of Sciences 90, no. 23 (1993): 10942–46. http://dx.doi.org/10.1073/pnas.90.23.10942.

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A quinone-independent photoreduction of the low potential form of cytochrome b559 has been studied using isolated reaction centers of photosystem II. Under anaerobic conditions, the cytochrome can be fully reduced by exposure to strong illumination without the addition of any redox mediators. Under high light conditions, the extent and rate of the reduction is unaffected by addition of the exogenous electron donor Mn2+ and, during this process, no irreversible damage occurs to the reaction center. However, prolonged illumination in strong light brings about irreversible bleaching of chlorophyl

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Gui, Xia, Yao Lu, Qin Wang, Mengdie Cai, and Song Sun. "Application of Quantum Dots for Photocatalytic Hydrogen Evolution Reaction." Applied Sciences 14, no. 12 (2024): 5333. http://dx.doi.org/10.3390/app14125333.

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There is increased interest in the conversion of solar energy into green chemical energy because of the depletion of fossil fuels and their unpleasant environmental effect. Photocatalytic hydrogen generation from water involves the direct conversion of solar energy into H2 fuels, which exhibits significant advantages and immense promise. Nevertheless, photocatalytic efficiency is considerably lower than the standard range of industrial applications. Low light absorption efficiency, the rapid recombination of photogenerated electrons and holes, slow surface redox reaction kinetics and low photo

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Ma, Xiaohua, Dehua Deng, Ning Xia, Yuanqiang Hao, and Lin Liu. "Electrochemical Immunosensors with PQQ-Decorated Carbon Nanotubes as Signal Labels for Electrocatalytic Oxidation of Tris(2-carboxyethyl)phosphine." Nanomaterials 11, no. 7 (2021): 1757. http://dx.doi.org/10.3390/nano11071757.

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Nanocatalysts are a promising alternative to natural enzymes as the signal labels of electrochemical biosensors. However, the surface modification of nanocatalysts and sensor electrodes with recognition elements and blockers may form a barrier to direct electron transfer, thus limiting the application of nanocatalysts in electrochemical immunoassays. Electron mediators can accelerate the electron transfer between nanocatalysts and electrodes. Nevertheless, it is hard to simultaneously achieve fast electron exchange between nanocatalysts and redox mediators as well as substrates. This work pres

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Zhou, Lufang, Jennifer E. Salem, Gerald M. Saidel, William C. Stanley, and Marco E. Cabrera. "Mechanistic model of cardiac energy metabolism predicts localization of glycolysis to cytosolic subdomain during ischemia." American Journal of Physiology-Heart and Circulatory Physiology 288, no. 5 (2005): H2400—H2411. http://dx.doi.org/10.1152/ajpheart.01030.2004.

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A new multidomain mathematical model of cardiac cellular metabolism was developed to simulate metabolic responses to reduced myocardial blood flow. The model is based on mass balances and reaction kinetics that describe transport and metabolic processes of 31 key chemical species in cardiac tissue. The model has three distinct domains (blood, cytosol, and mitochondria) with interdomain transport of chemical species. In addition to distinguishing between cytosol and mitochondria, the model includes a subdomain in the cytosol to account for glycolytic metabolic channeling. Myocardial ischemia wa

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Hu, Xuanying, Kai Tao, and Lei Han. "CeO2 decorated on Co-ZIF-L-derived nickel-cobalt sulfide hollow nanosheet arrays for high-performance supercapacitors." Dalton Transactions, 2022. http://dx.doi.org/10.1039/d2dt02300h.

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Transition metal sulfides have been widely explored as electrode materials for supercapacitors. Unfortunately, the slow redox reaction kinetics and severe volume changes during charge/discharge result in compromised electrochemical performance. In...

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Xue, Li, Dehao Yu, Jing Sun, et al. "Rapid GSH Detection and Versatile Peptide/Protein Labelling to Track Cell Penetrating using Coumarin-Based Probes." Analyst, 2022. http://dx.doi.org/10.1039/d2an01510b.

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Biothiols play essential roles in balancing redox state and modulating cellular functions. Fluorescent probes for monitoring/labelling biothiols often suffer from slow reaction rates, strong background fluorescence and cytotoxic byproducts release....

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chen, silan, Lujie Jin, Yujin Ji, and Youyong Li. "Identifying efficient two-dimensional transition metal oxide cathodes for non-aqueous lithium‒oxygen batteries using work function as a simple descriptor." Journal of Materials Chemistry A, 2025. https://doi.org/10.1039/d5ta00474h.

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Li, Chuang, Qi Zhang, Jinzhi Sheng, et al. "A quasi-intercalation reaction for fast sulfur redox kinetics in solid-state lithium-sulfur batteries." Energy & Environmental Science, 2022. http://dx.doi.org/10.1039/d2ee01820a.

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Solid-state lithium-sulfur (Li-S) batteries are recognized as a competitive candidate for next-generation energy storage systems due to their high energy density and safety. However, the slow redox kinetics between S...

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