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Journal articles on the topic 'Two-level kinetics'

Author: Grafiati

Published: 28 May 2022

Last updated: 31 July 2025

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1

Kol'tsov, Nikolay I. "DYNAMICS OF TWO-STAGE CATALYTIC REACTIONS WITH NON-IDEAL KINETICS." ChemChemTech 68, no. 6 (2025): 59–69. https://doi.org/10.6060/ivkkt.20256806.7176.

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The dynamics of two-stage catalytic reactions occurring quasi-steady-state for the main substances (reagents) according to the typical two-stage Temkin and Bonhoeffer-Farkash mechanisms was investigated in an open isothermal gradientless system with the Marcelin-De Donde kinetic law. The Marcelin-De Donde kinetic law takes into account the non-ideality of the reaction medium by expressing the reaction rate through the chemical potentials of intermediate substances, which linearly depend on the concentrations and mutual influence of these substances. The level of mutual influence of intermediat

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Sugandi, Deny, Dewi Susilawati, and Yogi Akin. "Increased Attention Through Kinetic Life Aith A Level Of Concentration On Physical Education Learning: A Study In Elementary School Students." JUARA : Jurnal Olahraga 8, no. 1 (2023): 277–89. http://dx.doi.org/10.33222/juara.v8i1.2710.

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This research examines the effect of the learning model using life kinetics on increasing learning attention as seen from the concentration level of students in one of the elementary schools in Kab. Bandung. The research method used in this research is an experimental method adapted to the research objectives of wanting to know the truth of hypotheses regarding causal relationships with a Quasi-Experimental Design research design. The analysis technique in this study uses multiple classification analyses of variance, using two ways (two-way ANOVA). Two-way analysis of variance to analyze the e

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Longo, Savino. "Stochastic models for the kinetics of ensembles of two-level systems." Physics Letters A 267, no. 2-3 (2000): 117–21. http://dx.doi.org/10.1016/s0375-9601(00)00083-9.

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Caldwell, Graham E., Li Li, Steve D. McCole, and James M. Hagberg. "Pedal and Crank Kinetics in Uphill Cycling." Journal of Applied Biomechanics 14, no. 3 (1998): 245–59. http://dx.doi.org/10.1123/jab.14.3.245.

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Alterations in kinetic patterns of pedal force and crank torque due to changes in surface grade (level vs. 8% uphill) and posture (seated vs. standing) were investigated during cycling on a computerized ergometer. Kinematic data from a planar cine analysis and force data from a pedal instrumented with piezoelectric crystals were recorded from multiple trials of 8 elite cyclists. These measures were used to calculate pedal force, pedal orientation, and crank torque profiles as a function of crank angle in three conditions: seated level, seated uphill, and standing uphill. The change in surface

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Xiao, Yi, Jaeyoung Hong, Xiao Wang, Tao Chen, Taeghwan Hyeon, and Weilin Xu. "Revealing Kinetics of Two-Electron Oxygen Reduction Reaction at Single-Molecule Level." Journal of the American Chemical Society 142, no. 30 (2020): 13201–9. http://dx.doi.org/10.1021/jacs.0c06020.

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Станишевский, И. В., та С. М. Арабей. "Определение констант скоростей и механизма фотопревращений металлопорфиринов методом решения обратной фотокинетической задачи". Оптика и спектроскопия 129, № 2 (2021): 153. http://dx.doi.org/10.21883/os.2021.02.50552.180-20.

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The fluorescence kinetics of some substituted Zn- and Mg-porphyrins in solid polymer films upon excitation by two-step-wise rectangular laser pulses and 293 K were investigated by the inverse kinetic problem methods. The experimental non-monotonic kinetic curves were approximated by the simulated ones within the framework of a six-level energy scheme describing the reversible interconversions between the two complexes. The best fit between the experimental and simulated curves was obtained by iterative optimization using the Nelder-Mead algorithm. Based on the statistically estimated values

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Petrov, E. G., Ye V. Shevchenko, V. O. Leonov, and V. I. Teslenko. "Kinetics in the Two-Level System with Strong Time-De-pendent Coupling of Its States to the Phonon Bath: Spin-Boson Description." Ukrainian Journal of Physics 69, no. 8 (2024): 552. http://dx.doi.org/10.15407/ujpe69.8.552.

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Using the methods of nonequilibrium statistical mechanics, the master equation for the density matrix of an open dissipative quantum system is obtained under conditions, when the coupling between the electronic states of the system and the nuclear displacements in it is controlled by the alternating field. A time-dependent polaron transformation is proposed, which made it possible to solve kinetic equations using an expansion in a parameter characterizing transitions between “phonon-dressed” electronic states of the system. As an example, a mechanism is shown that can control the kinetics in a

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Burgin, M. S. "Equivalent two-level atom method for calculating the kinetics of cosmological hydrogen recombination." Bulletin of the Lebedev Physics Institute 36, no. 4 (2009): 110–13. http://dx.doi.org/10.3103/s1068335609040034.

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Ota, Susumu, Ai Nakanishi, Hirotaka Sato, Seiji Akita, Kazunori Hase, and Yasuo Suzuki. "DIFFERENCES IN KNEE JOINT KINEMATICS AND KINETICS DURING LEVEL WALKING AND WALKING WITH TWO TYPES OF POLES — FOCUS ON KNEE VARUS MOMENT." Journal of Musculoskeletal Research 16, no. 04 (2013): 1350018. http://dx.doi.org/10.1142/s0218957713500188.

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Walking with poles is one of the gait modification strategies for reducing external knee varus moments in people with medial knee osteoarthritis (OA). However, there are two types of pole techniques, Nordic walking (NW: pole back condition) and pole walking (PW: pole front condition). The purpose of this study was to investigate the differences in knee joint kinematics, and kinetics during level walking, and two types of walking with poles. A total of 22 subjects with a mean age of 21.2 years (SD: 1.3 years) participated. Three-dimensional gait analysis was conducted on level walking (LW), NW

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Jing, Wenwen, Ashley Hunt, Nongjian Tao, Fenni Zhang, and Shaopeng Wang. "Simultaneous Quantification of Protein Binding Kinetics in Whole Cells with Surface Plasmon Resonance Imaging and Edge Deformation Tracking." Membranes 10, no. 9 (2020): 247. http://dx.doi.org/10.3390/membranes10090247.

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Most drugs work by binding to receptors on the cell surface. Quantification of binding kinetics between drug and membrane protein is an essential step in drug discovery. Current methods for measuring binding kinetics involve extracting the membrane protein and labeling, and both have issues. Surface plasmon resonance (SPR) imaging has been demonstrated for quantification of protein binding to cells with single-cell resolution, but it only senses the bottom of the cell and the signal diminishes with the molecule size. We have discovered that ligand binding to the cell surface is accompanied by

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Huang, J. J., S. W. Chen, J. R. Wang, C. Shih, H. T. Lin, and C. K. Chen. "The evaluation of TRACE/PARCS model for BWR-4 nuclear power plant by startup test transient analyses." Kerntechnik 86, no. 5 (2021): 353–64. http://dx.doi.org/10.1515/kern-2021-0009.

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Abstract Generally, the thermal hydraulic (TH) codes need the results of Neutron Kinetics (NK) codes providing the reactivity properties to calculate neutron flux. Then the TH codes perform the safety analyses obtaining the responses of pressure, temperature, or water level. Two kinds of different codes calculate different physical behaviors sequentially and separately. Simultaneously computing thermal hydraulic and neutron kinetics behaviors can enhance the accuracy of the analysis. Hence, it is crucial to develop the TH-NK coupled model. This study presents the capability of the TH-NK couple

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Arkin, Adam, John Ross та Harley H. McAdams. "Stochastic Kinetic Analysis of Developmental Pathway Bifurcation in Phage λ-Infected Escherichia coli Cells". Genetics 149, № 4 (1998): 1633–48. http://dx.doi.org/10.1093/genetics/149.4.1633.

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Abstract Fluctuations in rates of gene expression can produce highly erratic time patterns of protein production in individual cells and wide diversity in instantaneous protein concentrations across cell populations. When two independently produced regulatory proteins acting at low cellular concentrations competitively control a switch point in a pathway, stochastic variations in their concentrations can produce probabilistic pathway selection, so that an initially homogeneous cell population partitions into distinct phenotypic subpopulations. Many pathogenic organisms, for example, use this m

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Vorensia, Selli, Idah Hadijah, and Nurul Aini. "Analisis Tingkat Kenyamanan Celana Panjang Wanita Menggunakan Pola Sistem Porrie Muliawan dan Sistem Praktis pada Ukuran Xxl." Jurnal Inovasi Teknologi dan Edukasi Teknik 1, no. 4 (2021): 315–24. http://dx.doi.org/10.17977/um068v1n4p315-324.

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The snug circumference is the part of the pants that needs to be considered, because this part affects the comfort of the pants when used to move. The purpose of this study was to analyze the comfort of women's trousers using the Porrie Muliawan System Pattern and the Practical System in XXL Size. This research is a type of descriptive research with a quantitative approach. There are two populations that will be discussed, namely the respondent population and the panelist population. Based on the results of the study, it can be concluded that the comfort level of women's trousers with the Porr

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Xu, Xiaojun, Tao Yu, and Shi-Jie Chen. "Understanding the kinetic mechanism of RNA single base pair formation." Proceedings of the National Academy of Sciences 113, no. 1 (2015): 116–21. http://dx.doi.org/10.1073/pnas.1517511113.

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RNA functions are intrinsically tied to folding kinetics. The most elementary step in RNA folding is the closing and opening of a base pair. Understanding this elementary rate process is the basis for RNA folding kinetics studies. Previous studies mostly focused on the unfolding of base pairs. Here, based on a hybrid approach, we investigate the folding process at level of single base pairing/stacking. The study, which integrates molecular dynamics simulation, kinetic Monte Carlo simulation, and master equation methods, uncovers two alternative dominant pathways: Starting from the unfolded sta

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15

Lehtonen, Jussi. "Models of fertilization kinetics." Royal Society Open Science 2, no. 9 (2015): 150175. http://dx.doi.org/10.1098/rsos.150175.

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Fertilization functions describe how the number of realized fertilizations depends on gamete numbers or density. They provide insight into the fertilization process, and are important components in models on the evolution of reproductive and sex-specific traits. Existing fertilization functions generally examine the proportion of fertilized eggs as a function of sperm numbers or density in a given fertilization environment. Because these functions have been developed for species with highly diverged gametes, there is an inbuilt (and well justified) asymmetry in them: they treat eggs and sperm,

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16

Reinpõld, Karmen, and Indrek Rannama. "Oxygen Uptake and Bilaterally Measured Vastus Lateralis Muscle Oxygen Desaturation Kinetics in Well-Trained Endurance Cyclists." Journal of Functional Morphology and Kinesiology 8, no. 2 (2023): 64. http://dx.doi.org/10.3390/jfmk8020064.

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The aim of the present study was to compare and analyse the relationships between pulmonary oxygen uptake and vastus lateralis (VL) muscle oxygen desaturation kinetics measured bilaterally with Moxy NIRS sensors in trained endurance athletes. To this end, 18 trained athletes (age: 42.4 ± 7.2 years, height: 1.837 ± 0.053 m, body mass: 82.4 ± 5.7 kg) visited the laboratory on two consecutive days. On the first day, an incremental test was performed to determine the power values for the gas exchange threshold, the ventilatory threshold (VT), and V̇O2max levels from pulmonary ventilation. On the s

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Hu, C. ‐K, M. B. Small, and P. S. Ho. "Electromigration in Al(Cu) two‐level structures: Effect of Cu and kinetics of damage formation." Journal of Applied Physics 74, no. 2 (1993): 969–78. http://dx.doi.org/10.1063/1.354839.

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18

Popovic, Mladjan, Jaroslava Budinski-Simendic, Mirjana Jovicic, et al. "Curing kinetics of two commercial urea-formaldehyde adhesives studied by isoconversional method." Chemical Industry 65, no. 6 (2011): 717–26. http://dx.doi.org/10.2298/hemind110912088p.

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Differential scanning calorimetry (DSC) was used to evaluate the curing kinetics of two commercial urea-formaldehyde (UF) adhesives having different formaldehyde to urea (F/U) ratio of 1.112 (UF1) and 1.086 (UF2). DSC measurements were done in dynamic scanning regime with heating rates of 5, 10, 15 and 20?C?min-1 in order to determine the activation energy for each adhesive. Obtained data were analyzed using isoconversional methods with application of Ozawa-Flynn-Wall and Kissinger-Akahira-Sunose kinetic models. In addition, different catalyst levels were tested at the heating rate of 10?C/min

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Hemici, Mustapha, Stéphane Mottin, Michel Bon, Jean Yves Roncin, and Pierre Laporte. "Time resolved transient absorption probing of a laser plasma II." J. Phys. IV 1, no. C7 (1991): 561. https://doi.org/10.5281/zenodo.438921.

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During the last two decades dense rare gases have attracted a great number of workers due to their potentiality as laser media. In this respect a detailed knowledge of plasma kinetics is of great importance. A recent study of kinetics and decay processes in argon has shown that the 4s atomic levels act as decay steps. The present communication reports on a method allowing the kinetic study of an argon plasma by transient visible absorption spectroscopy from the frrst 4s-level manifold. The plasma is created by focusing a pulsed YAG laser in argon at variable pressure, typically in the atmosphe

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Huang, Yuanzhi, Steven G. Gilmour, Kalliopi Mylona, and Peter Goos. "Optimal Design of Experiments for Hybrid Nonlinear Models, with Applications to Extended Michaelis–Menten Kinetics." Journal of Agricultural, Biological and Environmental Statistics 25, no. 4 (2020): 601–16. http://dx.doi.org/10.1007/s13253-020-00405-3.

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Abstract Biochemical mechanism studies often assume statistical models derived from Michaelis–Menten kinetics, which are used to approximate initial reaction rate data given the concentration level of a single substrate. In experiments dealing with industrial applications, however, there are typically a wide range of kinetic profiles where more than one factor is controlled. We focus on optimal design of such experiments requiring the use of multifactor hybrid nonlinear models, which presents a considerable computational challenge. We examine three different candidate models and search for tai

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Ludwigs, Eva, Malte Bellmann, Thomas Schmalz, and Siegmar Blumentritt. "Biomechanical Differences between Two Exoprosthetic Hip Joint Systems during Level Walking." Prosthetics and Orthotics International 34, no. 4 (2010): 449–60. http://dx.doi.org/10.3109/03093646.2010.499551.

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Previous studies have shown low end-user acceptance of a hip disarticulation style prosthesis and that the limitations of such prostheses, including poor gait pattern, socket discomfort, weight of the prosthesis, loss of mobility, instability and high energy consumption are a contributing factor. This study was initiated to determine if a new style of prosthetic hip joint could help to overcome some of the limitations concerning the gait pattern. The present study analyzed the gait pattern of six hip disarticulation amputee subjects. The objective was to compare two different prosthetic hip jo

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Dejene, Kassahun, and Woldie Belachew. "Topic-Specific Pedagogical Content Knowledge-Based Instruction and Level of Conceptual Understanding of Chemical Kinetics and Equilibrium concepts on Grade 11 Students." Science Education International 34, no. 2 (2023): 96–108. http://dx.doi.org/10.33828/sei.v34.i2.3.

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The goal of this study was to assess students’ level of conceptual understanding of chemical kinetics and equilibrium using topic-specific pedagogical content knowledge (TSPCK)-based instruction in chemistry grade 11 students. The research was a mixed approach that involved 159 grade 11 chemistry class students from Addis Ababa administrative city, Ethiopia, and employed a mixture of qualitative and quantitative methodologies. Purposive sampling was used for the sample procedure and four intact classes were selected as three intervention groups and one control group: curricular saliency-based,

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Eyland, David, Jelle van Wesemael, Tracy Lawson, and Sebastien Carpentier. "The impact of slow stomatal kinetics on photosynthesis and water use efficiency under fluctuating light." Plant Physiology 186, no. 2 (2021): 998–1012. http://dx.doi.org/10.1093/plphys/kiab114.

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Abstract Dynamic light conditions require continuous adjustments of stomatal aperture. The kinetics of stomatal conductance (gs) is hypothesized to be key to plant productivity and water use efficiency (WUE). Using step-changes in light intensity, we studied the diversity of light-induced gs kinetics in relation to stomatal anatomy in five banana genotypes (Musa spp.) and modeled the impact of both diffusional and biochemical limitations on photosynthesis (A). The dominant A limiting factor was the diffusional limitation associated with gs kinetics. All genotypes exhibited a strong limitation

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Lim, Seung-Jae, Kyung-Hwa Choi, Jin Hyuck Lee, Joon Young Jung, Woosol Han, and Byung Hoon Lee. "Different Kinetics of Perioperative CRP after Hip Arthroplasty for Elderly Femoral Neck Fracture with Elevated Preoperative CRP." BioMed Research International 2018 (2018): 1–8. http://dx.doi.org/10.1155/2018/2140105.

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This study aimed to determine the kinetics of four inflammatory markers and to identify the variables that affect the natural kinetics of inflammatory markers in aged patients having hip fractures with and without elevated preoperative CRP. 240 elderly patients who have been operated on for femoral neck fracture with no infectious complications were divided into two groups on elevated preoperative CRP level (>10 mg/L). The temporal values of four inflammatory markers of WBC, neutrophil count (N) (%), ESR, and CRP were assessed eight times every other day until the 14th postoperative day. At

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Zheng, Yan Min, Jun Hui Zhang, and Zhao Gui Su. "Kinetics Study on Burning Performance of Polyurethane Foam." Applied Mechanics and Materials 174-177 (May 2012): 429–32. http://dx.doi.org/10.4028/www.scientific.net/amm.174-177.429.

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This article uses the thermal analysis to study the kinetics characteristics of Polyurethane foam. The partially oxidized and non oxidized materials were used to study the variation of reaction of the smoldering, and the mechanism of function and activation energy of two substances was obtained. The result show that the oxygenolysis of the non oxidized Polyurethane foam belongs to the second-level chemical reaction, while the oxygenolysis of partially oxidized belongs to the first-level chemical reaction; the oxidization reaction of Polyurethane foam is a process which have lots of reaction st

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Longo, S., D. Bruno, M. Capitelli, and P. Minelli. "A Monte Carlo model for the non-equilibrium coherent kinetics of ensembles of two level systems." Chemical Physics Letters 316, no. 3-4 (2000): 311–17. http://dx.doi.org/10.1016/s0009-2614(99)01236-1.

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Castle, Brian T., Seth McCubbin, Louis S. Prahl, Jordan N. Bernens, David Sept, and David J. Odde. "Mechanisms of kinetic stabilization by the drugs paclitaxel and vinblastine." Molecular Biology of the Cell 28, no. 9 (2017): 1238–57. http://dx.doi.org/10.1091/mbc.e16-08-0567.

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Microtubule-targeting agents (MTAs), widely used as biological probes and chemotherapeutic drugs, bind directly to tubulin subunits and “kinetically stabilize” microtubules, suppressing the characteristic self-assembly process of dynamic instability. However, the molecular-level mechanisms of kinetic stabilization are unclear, and the fundamental thermodynamic and kinetic requirements for dynamic instability and its elimination by MTAs have yet to be defined. Here we integrate a computational model for microtubule assembly with nanometer-scale fluorescence microscopy measurements to identify t

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Willis, Sarah J., Jules Gellaerts, Benoît Mariani, Patrick Basset, Fabio Borrani, and Grégoire P. Millet. "Level Versus Uphill Economy and Mechanical Responses in Elite Ultratrail Runners." International Journal of Sports Physiology and Performance 14, no. 7 (2019): 1001–5. http://dx.doi.org/10.1123/ijspp.2018-0365.

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Purpose: To examine the net oxygen cost, oxygen kinetics, and kinematics of level and uphill running in elite ultratrail runners. Methods: Twelve top-level ultradistance trail runners performed two 5-min stages of treadmill running (level, 0%, men 15 km·h−1, women 13 km·h−1; uphill, 12%, men 10 km·h−1, women 9 km·h−1). Gas exchanges were measured to obtain the net oxygen cost and assess oxygen kinetics. In addition, running kinematics were recorded with inertial measurement unit motion sensors on the wrist, head, belt, and foot. Results: Relationships resulted between level and uphill running

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Assoumani, A., L. Favier-Teodorescu, and D. Wolbert. "Adsorption kinetics and isotherm characteristics of selected endocrine disrupting compounds on activated carbon in natural waters." Water Supply 9, no. 1 (2009): 51–58. http://dx.doi.org/10.2166/ws.2009.063.

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Bisphenol A (BPA) and ethynylestradiol (EE2), two representative endocrine disrupting compounds (EDCs), were tested for their adsorbabilities onto two powdered activated carbons (PACs). The main aim of the study was to create a prediction tool for the determination of the EDCs adsorbabilities at low ng.L−1 level. Single solute solution adsorption isotherms at high concentrations, for prediction purposes, and low concentrations, for verification of the prediction, were performed for one EDC/PAC couple. Over the whole range of concentration, results showed that the Langmuir-Freundlich model bett

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Sumner, Bonnie, John McCamley, David J. Jacofsky, and Marc C. Jacofsky. "Comparison of Knee Kinematics and Kinetics during Stair Descent in Single- and Multi-Radius Total Knee Arthroplasty." Journal of Knee Surgery 33, no. 10 (2019): 1020–28. http://dx.doi.org/10.1055/s-0039-1692652.

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AbstractDespite continuing advances, nearly 20% of patients remain dissatisfied with their total knee arthroplasty (TKA) outcomes. Single-radius (SR) and multiradius (MR) TKA designs are two commonly used knee replacement designs based on competing theories of the flexion/extension axis of the knee. Our aim was to characterize stair descent kinematics and kinetics in SR and MR TKA subjects. We hypothesized that 1 year after TKA, patients who received SR TKA will more closely replicate the knee kinematics and kinetics of healthy age-matched controls during stair descent, than will MR TKA patien

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Shu, Yang, Dong Sun, Qiu Li Hu, Yan Zhang, Jian She Li, and Yao Dong Gu. "Lower Limb Kinetics and Kinematics during Two Different Jumping Methods." Journal of Biomimetics, Biomaterials and Biomedical Engineering 22 (March 2015): 29–35. http://dx.doi.org/10.4028/www.scientific.net/jbbbe.22.29.

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The purpose of the study is to investigate into the dynamic and kinematic parameters of lower limbs about two types of jump high-level basketball athlete doing: countermovement jump and squat jump. There were distinctively different in jump height between two types. Kinetics and kinematics parameters of squat jump were less than countermovement jump. Using Vertical Jumps countermovement jump can increase the height of vertical jump effectively. These jumps all can cushion the pressure of impact force in landing phase.

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Radhakrishnan, K. "New Integration Techniques for Chemical Kinetic Rate Equations: Part II—Accuracy Comparison." Journal of Engineering for Gas Turbines and Power 108, no. 2 (1986): 348–53. http://dx.doi.org/10.1115/1.3239910.

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A comparison of the accuracy of several techniques recently developed for solving stiff differential equations is presented. The techniques examined include two general-purpose codes EPISODE and LSODE developed for an arbitrary system of ordinary differential equations, and three specialized codes CHEMEQ, CREK1D, and GCKP84 developed specifically to solve chemical kinetic rate equations. The accuracy comparisons are made by applying these solution procedures to two practical combustion kinetics problems. Both problems describe adiabatic, homogeneous, gas-phase chemical reactions at constant pr

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Walton-Raaby, Max, Tyler Floen, and Nelaine Mora-Diez. "Modelling the Repair of Carbon-Centered Protein Radicals by Phenolic Antioxidants." Antioxidants 13, no. 11 (2024): 1368. http://dx.doi.org/10.3390/antiox13111368.

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Oxidative stress is a biological process that has been linked to many diseases, hence understanding how to prevent and repair it is essential to medicine. The thermodynamics and kinetics of the repair reactions of radically damaged leucine (a lateral chain in a simplified protein environment) by twenty phenolic antioxidants are studied at the M06-2X(SMD)/6-31++G(d,p) level of theory in water and pentyl ethanoate. The two repair mechanisms modelled are formal-hydrogen atom transfer (f-HAT) and single electron transfer (SET). Although all f-HAT reactions are thermodynamically favourable, only on

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Dai, Lu, Hongqi Dai, Yangchun Yuan, Xuan Sun, and Zhengjun Zhu. "Effects of TEMPO oxidation system on kinetic constants of cotton fibers." BioResources 6, no. 3 (2011): 2619–31. http://dx.doi.org/10.15376/biores.6.3.2619-2631.

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The kinetics of the TEMPO-mediated oxidation of cotton fibers were studied. It was revealed that the oxidation reaction of the cotton fibers by TEMPO/NaBr/NaClO system can be approximately described as two pseudo-first-order reaction kinetics that are based on the cellulose microstructure, namely the kinetic processes of the primary wall and the secondary wall. In the concentration range used in this study, the rate constant k was directly proportional to the concentration of TEMPO. As to NaBr, the rate constant was proportional to the concentration in a relatively lower range, while it tended

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Du, E., Monica Diez-Silva, Gregory J. Kato, Ming Dao, and Subra Suresh. "Kinetics of sickle cell biorheology and implications for painful vasoocclusive crisis." Proceedings of the National Academy of Sciences 112, no. 5 (2015): 1422–27. http://dx.doi.org/10.1073/pnas.1424111112.

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We developed a microfluidics-based model to quantify cell-level processes modulating the pathophysiology of sickle cell disease (SCD). This in vitro model enabled quantitative investigations of the kinetics of cell sickling, unsickling, and cell rheology. We created short-term and long-term hypoxic conditions to simulate normal and retarded transit scenarios in microvasculature. Using blood samples from 25 SCD patients with sickle hemoglobin (HbS) levels varying from 64 to 90.1%, we investigated how cell biophysical alterations during blood flow correlated with hematological parameters, HbS le

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Antunes, André, Christophe Domingos, Luísa Diniz, et al. "The Relationship between VO2 and Muscle Deoxygenation Kinetics and Upper Body Repeated Sprint Performance in Trained Judokas and Healthy Individuals." International Journal of Environmental Research and Public Health 19, no. 2 (2022): 861. http://dx.doi.org/10.3390/ijerph19020861.

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The present study sought to investigate if faster upper body oxygen uptake (VO2) and hemoglobin/myoglobin deoxygenation ([HHb]) kinetics during heavy intensity exercise were associated with a greater upper body repeated-sprint ability (RSA) performance in a group of judokas and in a group of individuals of heterogenous fitness level. Eight judokas (JT) and seven untrained healthy participants (UT) completed an incremental step test, two heavy intensity square-wave transitions and an upper body RSA test consisting of four 15 s sprints, with 45 s rest, from which the experimental data were obtai

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Kobayashi, Satoru, Stefan Zaefferer, and Dierk Raabe. "The Relative Importance of Nucleation vs. Growth for Recrystallisation in Particle-Containing Fe₃Al Alloys." Materials Science Forum 550 (July 2007): 345–50. http://dx.doi.org/10.4028/www.scientific.net/msf.550.345.

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Recrystallisation behavior was studied in two Fe3Al-based alloys containing both large and fine particles with a different fine particle dispersion level using high-resolution SEM and EBSD. High misorientation of 15-30° was created around large particles after a hot rolling process in the two alloys. The kinetics of recrystallisation were, however, considerably retarded in the alloy containing dense fine particles. It was observed that the growth of subgrains created around the large particles was inhibited by the presence of the fine particles. This result clearly suggests that when the parti

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Kaleeswari. S. "Analytical Solution of Chemical Reaction Systems using Kinetic Models." Advances in Nonlinear Variational Inequalities 28, no. 1s (2024): 137–46. http://dx.doi.org/10.52783/anvi.v28.2234.

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It encompasses multiple model kinds, such as spatially distributed versus homogenous, discrete versus continuous, and stochastic versus determinist. Among all chemical reactions, oscillating reactions are the most exciting. Here, the reactant and auto catalyst are the two chemical species that make up the system. The analysis of chemical reaction processes by mathematical approaches has also a long history. We now shift our focus to mathematical frameworks for the deterministic kinetics of mass motion. On the positive orthant, these models are systems of related nonlinear differential equation

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Ямщиков, В. М., В. Г. Рогачев, Е. А. Кудряшов та Г. Н. Качалин. "Перенос и пленение резонансного излучения в двухуровневой системе". Журнал технической физики 128, № 8 (2020): 1160. http://dx.doi.org/10.21883/os.2020.08.49714.318-19.

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A theoretical research of the population kinetics of a two-level system with allowance for the transfer of spontaneous emission under continuous optical pumping is presented. It is shown that in the case when the photon mean free path in a resonantly absorbing medium is less than or comparable with the characteristic size of this medium, spontaneous emission can be an additional pump source. Two approaches were used to consider the influence of the spontaneous photon contribution to the kinetics of levels. The first approach is to solve the radiation transfer equation in the diffusion approxim

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Mattsson, Cecilia, Merima Hasani, Binh Dang, Maxim Mayzel, and Hans Theliander. "About structural changes of lignin during kraft cooking and the kinetics of delignification." Holzforschung 71, no. 7-8 (2017): 545–53. http://dx.doi.org/10.1515/hf-2016-0190.

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Abstract Wood meal was submitted to kraft cooking in a small-scale flow-through reactor and the structural changes of lignin have been investigated. The rate determining steps in kraft cooking were in focus. Based on two-dimensional nuclear magnetic resonance (2D-NMR) measurements on lignin fractions extracted at different cooking times from the black liquor, it was observed that the main lignin reactions occur within 10–20 min and thus the kinetics of the chemical reaction cannot be the rate-determining step. On the other hand, the molecular weight (MW) of lignin is shifted towards larger fra

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Станишевский, И. В., Т. А. Павич та С. М. Арабей. "Исследование изменения лигандного состава хелата Eu-=SUP=-3+-=/SUP=- методами двухступенчатого лазерного возбуждения люминесценции и компьютерного моделирования кинетики". Журнал технической физики 126, № 2 (2019): 134. http://dx.doi.org/10.21883/os.2019.02.47194.176-18.

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AbstractThe europium(III)–tris(dibenzoylmethane)–triphenylphosphine oxide complex was studied in the polycrystalline state and in toluene at 298 K using the luminescence excitation method with two-stage rectangular pulses with decreasing intensity of stages. Experimental nonmonotonic kinetic curves were numerically simulated within the framework of a four-level dynamic model describing reversible processes in the complex, associated with its structural rearrangement. The maximum correspondence between the experimental and simulated curves was obtained using an iterative approximation performed

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Habiddin, Habiddin, and Elizabeth Mary Page. "Uncovering Students’ Genuine Misconceptions: Evidence to Inform the Teaching of Chemical Kinetics." Acta Chimica Slovenica 70, no. 2 (2023): 184–95. http://dx.doi.org/10.17344/acsi.2022.7880.

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The aim of this study is to investigate first-year university students’ misconceptions in chemical kinetics by analysing data obtained from the four-tier diagnostic instrument of chemical kinetics (FTDICK). 335 first-year chemistry students from two Indonesian and one UK universities participated in this study. The procedure described here is the first of its type to ensure those misconceptions are genuine. Numerous genuine misconceptions within chemical kinetics were revealed among first-year chemistry undergraduates. Although many of the misconceptions found here concur with those results pr

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Omar, Amr S., Suraj Sudarsanan, Samy Hanoura, et al. "Kinetics of Highly Sensitive Troponin T after Cardiac Surgery." BioMed Research International 2015 (2015): 1–9. http://dx.doi.org/10.1155/2015/574546.

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Perioperative myocardial infarction (PMI) confers a considerable risk in cardiac surgery settings; finding the ideal biomarker seems to be an ideal goal. Our aim was to assess the diagnostic accuracy of highly sensitive troponin T (hsTnT) in cardiac surgery settings and to define a diagnostic level for PMI diagnosis. This was a single-center prospective observational study analyzing data from all patients who underwent cardiac surgeries. The primary outcome was the diagnosis of PMI through a specific level. The secondary outcome measures were the lengths of mechanical ventilation (LOV), stay i

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MORI, E. E., and M. KAMARATOS. "ADSORPTION KINETICS OF POTASSIUM ON SrTiO3(100)." Surface Review and Letters 13, no. 05 (2006): 681–86. http://dx.doi.org/10.1142/s0218625x06008657.

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In this paper, we study the kinetics of potassium adsorption on SrTiO 3(100) surface at room temperature. The study took place in UHV using AES, EELS, LEED, TPD, and WF measurements. Potassium grows in two-dimensional islands with maximum coverage of 3.9 × 1014 at/cm2. During adsorption charge transfer from the K -4s to Ti -3d energy level has been observed. No K – O compound has been measured. After heating at 1050 K most of the adsorbed potassium desorbs and the SrTiO 3(100) (1 × 1) LEED pattern reappears. There is not any indication of potassium intercalation into the substrate, either at r

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Viswanath, R. P., and P. Wilson. "Catalytic Combustion of Carbon." Eurasian Chemico-Technological Journal 3, no. 3 (2017): 167. http://dx.doi.org/10.18321/ectj561.

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<p>Present day energy needs of mankind are strongly dependent on the combustion of fossil fuels and other carbonaceous materials. The combustion reaction is accompanied by simultaneous production of gaseous pollutants like CO, NO<sub>x</sub> and SO<sub>2</sub>. In the catalytic combustion, the advantages are two fold: i. The combustion efficiency will be higher and this results in the higher energy realization and ii. The operating temperatures being much lower the emission level of the pollutants also will be greatly reduced. In this study, thermogravimetric anal

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Ninomiya, K., M. Sakai, E. Ohba, and N. Kashiwagi. "Kinetic model for the biotransformation of tetrachloroethylene in groundwater." Water Science and Technology 30, no. 7 (1994): 13–18. http://dx.doi.org/10.2166/wst.1994.0293.

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The biotransformation of tetrachloroethylene (PCE) to trichloroethylene (TCE) and then to cis-1,2-dichloroethylene (cis-DCE) under an anaerobic condition was studied using static soil microcosms. The kinetics of the biotransformation could be well approximated by the consecutive first-order reaction model, PCE →k1 TCE →k2 cis-DCE This model implied that the total amount of the above three compounds was always constant and was equal to the initial amount of PCE, even if the amount of each compound changed with time. Based on this stoichiometric relationship, two indices to characterize groundwa

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Kim, Jiwon, Hyung Wook Choi, and Dae Ho Yoon. "Kinetically Accelerating Ni and C Dual Active Sites Via Pyrrolic-N for Water Dissociation and Alkaline Hydrogen Production." ECS Meeting Abstracts MA2024-02, no. 42 (2024): 2812. https://doi.org/10.1149/ma2024-02422812mtgabs.

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Green hydrogen, which is one of the most promising solutions to environmental issues and energy crises, can be produced through water electrolysis using renewable electricity as eco-friendly and sustainable route. However, the cathodic hydrogen evolution reaction (HER) has been a subject of extensive research due to the slow kinetics of proton-coupled electron transfer, which lowers the overall efficiency. In particular, the rate of HER in alkaline media appears two to three times slower than that in acidic or neutral media. This is because in order to form adsorbed hydrogen, additional water

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Hidayah, Nur, Kustantinah, Cuk Tri Noviandi, and Andriyani Astuti. "Effect of Palisada perforate (Bory) K.W.Nam supplementation on gas production and fermentation kinetics in total mixed ration." BIO Web of Conferences 164 (2025): 01005. https://doi.org/10.1051/bioconf/202516401005.

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This research aimed to evaluate Palisada perforate (Bory) K.W.Nam as a supplement on total mixed ration to their gas production and fermentation kinetics. A factorial randomized block design with two factors and five replications. The first factor was kinds of total mixed ration (TMR 1, 80% grass (G) and 20% concentrate (C) based on dry matter (DM); TRM 2, 70% G and 30% C; TMR 3, 60% G and 40% C) and the second factor was level of P. perforate (Bory) K.W.Nam supplementation (0 and 5% organic matter (OM)). There was no interaction between kinds of TMR and level of P. perforate (Bory) K.W.Nam su

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Hofer, Aldebaran M., Cristina Fasolato, and Tullio Pozzan. "Capacitative Ca2+ Entry Is Closely Linked to the Filling State of Internal Ca2+ Stores: A Study Using Simultaneous Measurements of ICRAC and Intraluminal [Ca2+]." Journal of Cell Biology 140, no. 2 (1998): 325–34. http://dx.doi.org/10.1083/jcb.140.2.325.

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ICRAC (the best characterized Ca2+ current activated by store depletion) was monitored concurrently for the first time with [Ca2+] changes in internal stores. To establish the quantitative and kinetic relationship between these two parameters, we have developed a novel means to clamp [Ca2+] within stores of intact cells at any level. The advantage of this approach, which is based on the membrane-permeant low-affinity Ca2+ chelator N,N,N′,N′-tetrakis (2-pyridylmethyl)ethylene diamine (TPEN), is that [Ca2+] within the ER can be lowered and restored to its original level within 10–15 s without mo

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Espinosa-Garcia, J., J. C. Corchado, M. Garcia-Chamorro, and C. Rangel. "F(2P) + C2H6 → HF + C2H5 kinetics study based on a new analytical potential energy surface." Physical Chemistry Chemical Physics 20, no. 30 (2018): 19860–70. http://dx.doi.org/10.1039/c8cp03103g.

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An exhaustive kinetics study was performed for the title reaction using two theoretical approaches: variational transition-state theory and quasi-classical trajectory calculations, based on an original new analytical full-dimensional potential energy surface, named PES-2018, which has been fitted to high-level ab initio calculations.

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