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Journal articles on the topic 'Diffusion-controlled system'

Author: Grafiati

Published: 28 May 2022

Last updated: 30 July 2025

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1

Singh, Rajinder, P. Matharu, and J. K. Lalla. "A Diffusion Controlled Drug Delivery System for Theophylline." Drug Development and Industrial Pharmacy 20, no. 7 (1994): 1225–38. http://dx.doi.org/10.3109/03639049409038363.

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2

Hannech, El-B., and C. R. Hall. "Diffusion controlled reactions in Au/Pb–Sn solder system." Materials Science and Technology 8, no. 9 (1992): 817–24. http://dx.doi.org/10.1179/mst.1992.8.9.817.

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3

Desaulniers, Donald E., Ronald S. Kaufmann, John A. Cherry, and Harold W. Bentley. "37Cl-35Cl variations in a diffusion-controlled groundwater system." Geochimica et Cosmochimica Acta 50, no. 8 (1986): 1757–64. http://dx.doi.org/10.1016/0016-7037(86)90137-7.

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4

Li, Xin, Bin Jiang, Hong Yang, Xiang Sheng Xia, Jia Hong Dai, and Fu Sheng Pan. "Solid–Liquid Diffusion and Phase Growth Kinetics in Mg-Ca Binary System." Materials Science Forum 816 (April 2015): 418–23. http://dx.doi.org/10.4028/www.scientific.net/msf.816.418.

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The solid–liquid diffusion between Mg and Mg-10 at.% Ca alloy was studied at a temperature range of 570°C to 630°C for 10, 20, 30min, respectively. Only one compound, Mg2Ca, was observed in the diffusion couples. As the diffusion time increased, the dendritic structure of the diffusion layer became coarser. The thickness of the diffusion layer had an exponential relation to the experimental temperature. The Mg2Ca phase was observed to follow parabolic growth with diffusion time, which suggested that the growth of the Mg2Ca phase was controlled by diffusion mechanism. The activation energy was

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5

Kasahara, Kento, and Hirofumi Sato. "A theory of diffusion controlled reactions in polyatomic molecule system." Journal of Chemical Physics 145, no. 19 (2016): 194502. http://dx.doi.org/10.1063/1.4967400.

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6

Liu, Yongfeng, Kun Luo, Yifan Zhou, Mingxia Gao, and Hongge Pan. "Diffusion controlled hydrogen desorption reaction for the LiBH4/2LiNH2 system." Journal of Alloys and Compounds 481, no. 1-2 (2009): 473–79. http://dx.doi.org/10.1016/j.jallcom.2009.02.142.

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7

Dekker, L., and S. W. Brok. "Analysis And Simulation Of A Twodimensional Boundary-Controlled Diffusion System." International Journal of Modelling and Simulation 9, no. 3 (1989): 69–72. http://dx.doi.org/10.1080/02286203.1989.11760072.

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8

Mauri, Emanuele, Anna Negri, Erica Rebellato, Maurizio Masi, Giuseppe Perale, and Filippo Rossi. "Hydrogel-Nanoparticles Composite System for Controlled Drug Delivery." Gels 4, no. 3 (2018): 74. http://dx.doi.org/10.3390/gels4030074.

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Biodegradable poly(ethylene glycol)-block-poly(-lactic acid) (PEG-b-PLA) nanoparticles (NPs) were prepared by nanoprecipitation with controlled dimension and with different electric charges, as monitored by dynamic light scattering (DLS). Then NPs were loaded within hydrogels (HG) developed for biomedical applications in the central nervous system, with different pore sizes (30 and 90 nm). The characteristics of the resulting composite hydrogel-NPs system were firstly studied in terms of ability to control the release of small steric hindrance drug mimetic. Then, diffusion-controlled release o

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9

Boldhane, Sanjay, and Bhanudas Kuchekar. "Development and optimization of metoprolol succinate gastroretentive drug delivery system." Acta Pharmaceutica 60, no. 4 (2010): 415–25. http://dx.doi.org/10.2478/v10007-010-0031-x.

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Development and optimization of metoprolol succinate gastroretentive drug delivery systemMetoprolol succinate (MS) gastroretentive (GR) controlled release system was formulated to increase gastric residence time leading to improved drug bioavailability. Box-Behnken model was followed using novel combinations of sodium alginate (SA), sodium carboxymethylcellulose (NaCMC), magnesium alumino metasilicate (MAS) as independent variables. Floating lag time (Flag),t25,t50,t75, diffusion exponent as dependent variables revealed that the amount of SA, NaCMC and MAS have a significant effect (p< 0.05

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10

Limpongsa, Ekapol, and Kraisri Umprayn. "Preparation and Evaluation of Diltiazem Hydrochloride Diffusion-Controlled Transdermal Delivery System." AAPS PharmSciTech 9, no. 2 (2008): 464–70. http://dx.doi.org/10.1208/s12249-008-9062-8.

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11

Lerch, M. "Diffusion controlled formation of β type phases in the system ZrO2_Zr3N4". Solid State Ionics 95, № 1-2 (1997): 87–93. http://dx.doi.org/10.1016/s0167-2738(96)00549-8.

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12

Hanika, Jiří, and Vladimíra Ehlová. "Effect of internal diffusion on kinetics of liquid phase hydrogenation and disproportionation of the cyclohexene on palladium catalysts." Collection of Czechoslovak Chemical Communications 54, no. 11 (1989): 3003–10. http://dx.doi.org/10.1135/cccc19893003.

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Kinetics of the side reactions represented by the system involving hydrogenation and disproportionation of cyclohexene on a commercial catalyst CHEROX 41-00 (3%Pd/C) and on a supported palladium catalyst prepared by impregnation of aluminia with aqueous palladium dichloride (2.15% Pd/γ-Al2O3) have been investigated. As follows from the effectiveness factors of internal diffusion for individual reactions, in the region of internal diffusion, cyclohexene hydrogenation is preferred compared to disproportionation. This finding can be related to the fact that while the rate of disproportionation is

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13

Boeck, T., and P. Rudolph. "The influence of thermal diffusion on the travelling heater method in a diffusion controlled growth system." Journal of Crystal Growth 79, no. 1-3 (1986): 105–9. http://dx.doi.org/10.1016/0022-0248(86)90423-9.

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14

Krupp, Ulrich, Katrin Jahns, Kamil Balinski, and Jürgen Wübbelmann. "Numerical Analysis of Diffusion-Controlled Internal Corrosion by the Cellular Automata Approach." Defect and Diffusion Forum 383 (February 2018): 51–58. http://dx.doi.org/10.4028/www.scientific.net/ddf.383.51.

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The cellular automata method offers a promising approach to describe diffusion and diffusion-controlled precipitation processes at high temperatures. During high temperature exposure, technical components like gas-turbine blades, furnaces, or exhaust systems, are operating in corrosive atmospheres. The resulting material-degradation processes are diffusion‐controlled, and corrosive species penetrate into the material leading to the formation of embrittling precipitates. Cellular automata (CA) represent distributed dynamical systems whose structure is particularly well suited to determine the t

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15

Kadhim, Murad M., and Qusay A. Abbas. "Bohm Diffusion in Magnetron Sputtering System: A Review Article." Iraqi Journal of Industrial Research 11, no. 3 (2024): 55–68. https://doi.org/10.53523/ijoirvol11i3id462.

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This review provides a comprehensive analysis of recent advances in understanding Bohm diffusion in magnetron sputtering systems, a process critical for optimizing thin-film deposition. Bohm diffusion significantly influences the spatial distribution and energy of sputtered particles near the substrate, impacting the overall film quality and performance. The review delves into theoretical models, experimental findings, and computational simulations to uncover the mechanisms driving Bohm diffusion within the plasma sheath. Key factors, such as magnetic field strength, gas pressure, target-to-su

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16

Anjali, Bhansali Dr. A. Chandewar Dr. Madhuri Channawar Ashwini warnkar Anisha kohale. "Design And Chacterization of Novel Topical Drug Delivery System." International Journal of Pharmaceutical Sciences 3, no. 5 (2025): 2915–25. https://doi.org/10.5281/zenodo.15450341.

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The present study focuses on the design and characterization of a novel topical drug delivery system incorporating Vitex negundo extract through microsponge technology followed by gel formulation. Vitex negundo, known for its potent anti-inflammatory and antimicrobial properties, and microsponges via the quasi-emulsion solvent diffusion technique, employing ethyl cellulose as the polymer and polyvinyl alcohol as the stabilizer. The prepared microsponges were characterized for particle size, surface morphology, entrapment efficiency, and thermal stability using techniques such as, scanning elec

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17

Huang, Song, Chengwu Yang, Ge Han, Shengfeng Zhao, and Xingen Lu. "Multipoint design optimization for a controlled diffusion airfoil compressor cascade." Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science 234, no. 11 (2020): 2143–59. http://dx.doi.org/10.1177/0954406220904730.

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Under high altitude and low Reynolds number conditions, the aerodynamic performance of compressor cascades deteriorates drastically. In this paper, an optimally designed system combining class-shape-transformation method, S1 surface flow solver and whale optimization algorithm was established to achieve for a controlled diffusion airfoil, called MANGHH. The aim of this work is to improve our understanding of the loss mechanism for the original cascade and optimal cascade under different inflow conditions. The study shows that the total pressure loss of the optimal cascade at an angle of attack

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18

Krichagina, Elena V., Sheldon X. C. Lou, Suresh P. Sethi, and Michael I. Taksar. "Diffusion Approximation for a Controlled Stochastic Manufacturing System with Average Cost Minimization." Mathematics of Operations Research 20, no. 4 (1995): 895–922. http://dx.doi.org/10.1287/moor.20.4.895.

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19

Felderhof, B. U., and R. B. Jones. "Reversible diffusion-controlled reactions in a disordered system of static spherical catalysts." Journal of Chemical Physics 111, no. 9 (1999): 4205–17. http://dx.doi.org/10.1063/1.479719.

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20

Dekker, L., and S. W. Brok. "Modelling and Stability Analysis of a Boundary Controlled 2-D Diffusion System." IFAC Proceedings Volumes 22, no. 4 (1989): 501–5. http://dx.doi.org/10.1016/s1474-6670(17)53595-8.

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21

Huang, Y. J., and L. James Lee. "Optimization of diffusion-controlled free radical polymerizations in a distributed parameter system." Chemical Engineering Science 44, no. 2 (1989): 363–76. http://dx.doi.org/10.1016/0009-2509(89)85073-0.

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22

Pastore, Raffaele, Antonio Ciarlo, Giuseppe Pesce, Antonio Sasso, and Francesco Greco. "A model-system of Fickian yet non-Gaussian diffusion: light patterns in place of complex matter." Soft Matter 18, no. 2 (2022): 351–64. http://dx.doi.org/10.1039/d1sm01133b.

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23

Mannam, Revathi, and Indira Muzib Yallamalli. "PHARMACOKINETIC STUDY OF MATRIX MEMBRANE MODERATED TRANSDERMAL SYSTEM OF BOSENTAN MONOHYDRATE." Asian Journal of Pharmaceutical and Clinical Research 10, no. 9 (2017): 255. http://dx.doi.org/10.22159/ajpcr.2017.v10i9.19282.

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Objective: The objective of the present research work is to carry out the pharmacokinetic studies of optimized matrix membrane moderatedtransdermal patch of bosentan monohydrate.Materials and Methods: The matrix membrane moderated transdermal system was formulated using HPMC, HPMC K4M and E RLPO. In vitrodiffusion studies were carried out using modified Franz diffusion cell and for the optimized transdermal patch, pharmacokinetic studies were carriedout using New Zealand male rabbits. Plasma samples were quantified using high-performance liquid chromatography.Results: The in vitro diffusion st

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24

GHASEMI, MARYAM, STEFANIE SONNER, and HERMANN J. EBERL. "Time adaptive numerical solution of a highly non-linear degenerate cross-diffusion system arising in multi-species biofilm modelling." European Journal of Applied Mathematics 29, no. 6 (2018): 1035–61. http://dx.doi.org/10.1017/s0956792518000554.

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We propose a numerical method for the simulation of a quasi-linear parabolic biofilm model that exhibits three non-linear diffusion effects: (i) a power law degeneracy, (ii) a super diffusion singularity and (iii) non-linear cross-diffusion. The method is based on a spatial Finite Volume discretisation in which cross-diffusion terms are formally treated as convection terms. Time-integration of the resulting semi-discretised system is carried out using an error-controlled, time-adaptive, embedded Rosenbrock–Wanner method. We compare several variants of the method and two variants of the model t

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25

Arora, Neha, and Balaji R. Jagirdar. "From (Au5Sn + AuSn) physical mixture to phase pure AuSn and Au5Sn intermetallic nanocrystals with tailored morphology: digestive ripening assisted approach." Phys. Chem. Chem. Phys. 16, no. 23 (2014): 11381–89. http://dx.doi.org/10.1039/c4cp00249k.

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26

Du, Runmei. "Approximate Controllability of the Degenerate System with the First-Order Term." Journal of Function Spaces 2015 (2015): 1–7. http://dx.doi.org/10.1155/2015/151484.

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We consider the approximate controllability of the degenerate system with the first-order term. The first-order term in the equation cannot be controlled by the diffusion term. The system is shown to be approximately controllable by constructing a control by means of its conjugate problem.

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27

Laporte, V., Krzysztof Wolski, Pascal Berger, A. Terlain, and Gerard Santarini. "Diffusion-Controlled Liquid Bismuth Induced Intergranular Embrittlement of Copper." Defect and Diffusion Forum 237-240 (April 2005): 683–88. http://dx.doi.org/10.4028/www.scientific.net/ddf.237-240.683.

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The consequences of the contact between liquid bismuth and a copper bicrystal are investigated at 500°C. Atoms of bismuth are shown to penetrate and embritlle the copper grain boundary. Grain boundary concentration profiles of bismuth are obtained on fracture surfaces by both Auger electron spectroscopy and He4+ Rutherford backscattering spectroscopy. The maximum bismuth intergranular concentration is calculated from experimental data to be about 1.7 monolayers (near the liquid bismuth / solid copper interface). The overall profiles are significantly different from typical erfc profiles and an

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28

He, Ping, and Yangmin Li. "Analytical solution of a hyperbolic partial differential equation and its application." International Journal of Intelligent Computing and Cybernetics 10, no. 2 (2017): 183–99. http://dx.doi.org/10.1108/ijicc-10-2016-0040.

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Purpose The purpose of this paper is to investigate the analytical solution of a hyperbolic partial differential equation (PDE) and its application. Design/methodology/approach The change of variables and the method of successive approximations are introduced. The Volterra transformation and boundary control scheme are adopted in the analysis of the reaction-diffusion system. Findings A detailed and complete calculation process of the analytical solution of hyperbolic PDE (1)-(3) is given. Based on the Volterra transformation, a reaction-diffusion system is controlled by boundary control. Orig

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29

Hasan, Md Nazmul, and Khan Rubayet Rahaman. "Pattern Formation in Intra-Specific Competition Food Chain System with Bifurcation and Chaos Control." International Journal of Bifurcation and Chaos 31, no. 03 (2021): 2150048. http://dx.doi.org/10.1142/s0218127421500486.

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The study is an attempt to explore the competitive effects on the top predators in the tri-trophic food chain model. Holling types II and IV functional responses are used to investigate the complex behavior of the tri-trophic prey–predator system. Reaction–diffusion systems have been used to represent temporal evolution and spatial interaction among the species. Consequently, local and global stabilities, and Hopf-bifurcation have been analyzed. The numerical simulation leads to spontaneous and interesting pattern formation in two dimensions, signifying diffusion interaction between mid- and t

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30

Furuto, Akira, and Masanori Kajihara. "Numerical Analysis for Kinetics of Reactive Diffusion Controlled by Boundary and Volume Diffusion in a Hypothetical Binary System." MATERIALS TRANSACTIONS 49, no. 2 (2008): 294–303. http://dx.doi.org/10.2320/matertrans.mra2007192.

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31

AITTA, ANNELI, HERBERT E. HUPPERT, and M. GRAE WORSTER. "Diffusion-controlled solidification of a ternary melt from a cooled boundary." Journal of Fluid Mechanics 432 (April 10, 2001): 201–17. http://dx.doi.org/10.1017/s0022112000003232.

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We present details of an experimental study of crystallization adjacent to a cooled boundary from an aqueous solution of potassium nitrate and sodium nitrate. This transparent system is typical of many ternary melts that do not form solid solutions, including examples in igneous petrology and metallurgy. We have measured the rates of advance of the front of crystallization and the eutectic front, behind which the system is completely solid. From careful measurements of the concentration and temperature fields, we have been able to infer the location of an internal phase boundary: the cotectic

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32

Zaman, Muhammad, Junaid Qureshi, Hira Ejaz, et al. "Oral controlled release drug delivery system and Characterization of oral tablets; A review." Pakistan Journal of Pharmaceutical Research 2, no. 1 (2016): 67. http://dx.doi.org/10.22200/pjpr.2016167-76.

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Oral route of drug administration is considered as the safest and easiest route of drug administration. Control release drug delivery system is the emerging trend in the pharmaceuticals and the oral route is most suitable for such kind of drug delivery system. Oral route is more convenient for It all age group including both pediatric and geriatrics. There are various systems which are adopted to deliver drug in a controlled manner to different target sites through oral route. It includes diffusion controlled drug delivery systems; dissolution controlled drug delivery systems, osmotically cont

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33

Gliko, Olga, Nicholas A. Booth, and Peter G. Vekilov. "Step bunching in a diffusion-controlled system: phase-shifting interferometry investigation of ferritin." Acta Crystallographica Section D Biological Crystallography 58, no. 10 (2002): 1622–27. http://dx.doi.org/10.1107/s0907444902014324.

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34

Baheti, Varun A., Sanjay Kashyap, Praveen Kumar, Kamanio Chattopadhyay, and Aloke Paul. "Solid–state diffusion–controlled growth of the phases in the Au–Sn system." Philosophical Magazine 98, no. 1 (2017): 20–36. http://dx.doi.org/10.1080/14786435.2017.1392052.

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35

Chamarthy, Sai Prasanth, and Rodolfo Pinal. "Plasticizer concentration and the performance of a diffusion-controlled polymeric drug delivery system." Colloids and Surfaces A: Physicochemical and Engineering Aspects 331, no. 1-2 (2008): 25–30. http://dx.doi.org/10.1016/j.colsurfa.2008.05.047.

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36

Kandasamy, Palani, and Souti Mukherjee. "Enhancing shelf life of tomato under controlled atmosphere condition using diffusion channel system." Engineering in Agriculture, Environment and Food 12, no. 1 (2019): 1–10. http://dx.doi.org/10.1016/j.eaef.2018.07.001.

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37

Irfan, Sayed Ameenuddin, and Radzuan Razali. "Mathematical modelling of controlled release fertilizer." Malaysian Journal of Fundamental and Applied Sciences 13, no. 4-1 (2017): 372–74. http://dx.doi.org/10.11113/mjfas.v13n4-1.878.

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Controlled release fertilizers (CRFs) are essential for sustainable agriculture system. CRFs are designed to maintain the constant optimum release rate of nutrients from the coated granule. This increase the plant uptake of nutrients hence reduces the soil pollution and decreases the crop expenditure. In the literature, the maximum studies have been done by considering the molecular diffusion as the only phenomenon responsible for nutrient release from CRFs. The molecular diffusion model is solved mostly by using the variable separable methods and Laplace transform as well as finite difference

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38

Fairchild, Robert W., Stephen Long, and Andrew Yule. "IMPLEMENTING A NEW DIFFUSION BATTERY FOR RADON PROGENY DOSE DETERMINATION." Radiation Protection Dosimetry 188, no. 3 (2020): 311–15. http://dx.doi.org/10.1093/rpd/ncz288.

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Abstract The Australian Radiation Laboratory Diffusion Battery was created in 1992 to evaluate radon progeny dose coefficients based on measured aerosol conditions. The Australian Radiation Laboratory Diffusion Battery used filters, alpha counters and a legacy laptop computer running a PowerBASIC program that controlled the hardware. Because technology has evolved, the original system is not supportable. A replacement system consisting of separate hardware and software modules has been created. The hardware counting module is based on the proven design of the Effective Dosimeter, using modern

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39

Mondal, Nita. "THE ROLE OF MATRIX TABLET IN DRUG DELIVERY SYSTEM." International Journal of Applied Pharmaceutics 10, no. 1 (2018): 1. http://dx.doi.org/10.22159//ijap.2018v10i1.21935.

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Matrix tablet is an important tool for controlled and sustained release dosage forms. The oral route remains the most common route for the administration of drugs. Tablets offer the lowest cost approach to sustained and controlled release dosage forms. The hydrophilic polymer matrix is widely used in this dosage form. The use of different polymers in controlling the release of drugs has become the most important tool in the formulation of matrix tablets. The drug releases by both dissolution-controlled as well as diffusion-controlled mechanisms from the matrix. The development of oral controll

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40

Tani, Jun-ichi, Guerman Popov, Paul R. Mort, and Richard E. Riman. "Precursor and processing effects on BaPbO3 formation kinetics." Journal of Materials Research 21, no. 3 (2006): 584–96. http://dx.doi.org/10.1557/jmr.2006.0071.

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The synthesis of BaPbO3 from a wide range of mixtures containing metalorganic precursors, nitrate precursors, lead oxides, barium oxide and peroxide was investigated, and the kinetics was analyzed using the Johnson–Mehl–Avrami (JMA) equation. It was found that Ba and Pb stearate soaps and Pb oxalate that were used as metalorganic precursors formed BaCO3 and PbO or Pb3O4 after firing at 440 °C. The formation rate of BaPbO3 from a metalorganic precursor system is not higher than that from the conventional BaCO3–PbO system and does not depend on mixing methods or the kinds of metalorganic precurs

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41

Schablitzki, T., J. Rogal, and R. Drautz. "A kinetic Monte Carlo approach to diffusion-controlled thermal desorption spectroscopy." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 375, no. 2098 (2017): 20160404. http://dx.doi.org/10.1098/rsta.2016.0404.

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Atomistic simulations of thermal desorption spectra for effusion from bulk materials to characterize binding or trapping sites are a challenging task as large system sizes as well as extended time scales are required. Here, we introduce an approach where we combine kinetic Monte Carlo with an analytic approximation of the superbasins within the framework of absorbing Markov chains. We apply our approach to the effusion of hydrogen from BCC iron, where the diffusion within bulk grains is coarse grained using absorbing Markov chains, which provide an exact solution of the dynamics within a super

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42

Klümper-Westkamp, Heinrich, Marian G. Skalecki, and Hans-Werner Zoch. "Sensor system for controlled carbonitriding." Matériaux & Techniques 106, no. 1 (2018): 102. http://dx.doi.org/10.1051/mattech/2018027.

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Carbonitriding is mainly used to enhance the hardenability and wear resistance of unalloyed steels. Last year investigations have shown that improved component properties can efficiently be obtained by carbonitriding also low alloy and even higher alloy steels. The importance of carbonitriding rises. In the past, carbonitriding was done with constant ammonia additions, e.g. 2–5 vol% are added to the carburizing atmosphere without controlling or measuring the nitriding potential of the atmosphere. The results scatter in a wide rage depending on furnace, batch size and load and many other influe

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43

Guo Si-Hang, Yang Guang-Yu, Meng Guo-Qing, Wang Ying-Ying, Pan Jun-Xing, and Zhang JinJun. "Dynamic Self-Assembly of Active Particle Systems Controlled by Light Fields." Acta Physica Sinica 74, no. 9 (2025): 0. https://doi.org/10.7498/aps.74.20241556.

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Active particle systems are nonequilibrium systems composed of selfpropelled Brownian particles, where interactions between particles can give rise to various collective behaviors. This study, based on Brownian dynamics simulations, explores the effects of light intensity, rotational diffusion coefficient, and the width and spacing of illuminated regions on the aggregation structures of the system. First, this study examines the influence of light intensity on aggregation structures under different rotational diffusion coefficients, finding that as the rotational diffusion coefficient increase

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44

Backhaus-Ricoult, M., and R. Dieckmann. "Defects and Cation Diffusion in Magnetite (VII): Diffusion Controlled Formation of Magnetite During Reactions in the Iron-Oxygen System." Berichte der Bunsengesellschaft für physikalische Chemie 90, no. 8 (1986): 690–98. http://dx.doi.org/10.1002/bbpc.19860900814.

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45

Zhang, Xinming, Yi Li, and Youhua Fan. "Regularization Cuckoo Search Algorithm for Multi-Parameter Optimization of the Multi-Laminated Controlled Release System." Axioms 11, no. 10 (2022): 500. http://dx.doi.org/10.3390/axioms11100500.

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The multi-laminated controlled release system has been widely used in the modern pharmaceutical industry because of its simple structure and safety, which can control the drug release behavior by regulating its internal parameters. To achieve three desired drug release behaviors of constant rate, linear reduction, and nonlinearity, which can be controlled by the optimization of the controllable parameters in the controlled release system, such as initial concentration and diffusion coefficient, a new regularization cuckoo search algorithm based on the cuckoo search algorithm and Tikhonov regul

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46

Kalishyn, Yevhen Yu, Małgorzata Rachwalska, and Peter E. Strizhak. "Stirring Effect on the Belousov-Zhabotinsky Oscillating Chemical Reactions in a Batch. Experimental and Modelling." Zeitschrift für Naturforschung A 65, no. 1-2 (2010): 132–40. http://dx.doi.org/10.1515/zna-2010-1-215.

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AbstractWe have studied the stirring effect on the time-delayed bifurcations of transient oscillations in the Belousov-Zhabotinsky (BZ) oscillating chemical reaction in a closed system. Experiments show that oscillations disappear through the time-delayed Hopf bifurcations, whose parameters depend on the stirring rate. The explanation of the stirring effect is based on the theories of diffusion-controlled reactions and hydrodynamic turbulence. We show that an increase of the stirring rate leads to an increase of the rate constant for the diffusion-controlled reaction. We propose a kinetic sche

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47

Lee, Sean. "Investigating the Feasibility of Xylitol and Gelatin for Controlled Release System in Drug Delivery using Calcium Alginate." Journal of International Research in Medical and Pharmaceutical Sciences 19, no. 3 (2024): 52–69. http://dx.doi.org/10.56557/jirmeps/2024/v19i38890.

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Calcium Alginate-based beads have been recognized to have high potential for pharmaceutical applications thanks to their ease of use and biocompatibility. This study aims to investigate how xylitol and gelatin could be used for a controlled drug delivery system and how to manipulate such a delivery system. For the study, calcium alginate beads were synthesized using two different calcium compounds: calcium lactate (CL) and calcium chloride (CC). Varying concentrations of the calcium compounds in the beads were prepared to measure their effects on their characteristics, such as size, weight, st

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Korosteleva, E. N., A. G. Knyazeva, M. A. Anisimova, and I. O. Nikolaev. "The impact of impurities on the Al–Fe–C system phase composition changes during sintering." Powder Metallurgy аnd Functional Coatings 17, no. 2 (2023): 5–13. http://dx.doi.org/10.17073/1997-308x-2023-2-5-13.

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Manufacturing waste can be not only recycled but also utilized as a source of chemical elements and as a component of powder materials. Steel swarf are a complex multicomponent material with a high iron content, while impurities such as carbon can affect the diffusion interaction in the chip and metal powder mixture. In this study, we investigate the diffusion interaction between aluminum and steel swarf using temperature-controlled vacuum sintering. We analyzed the resulting mixture’s microstructure and phase composition, and observed that sintering creates a multiphase structure in which FeA

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Chen, Y. C., Hong Zhi Cui, J. Ding, and Yun Bo Chen. "Experiments Proving the Mixed Control of the Reactive Diffusion System Zn/Fe₃Si with Clamp Press." Defect and Diffusion Forum 258-260 (October 2006): 59–62. http://dx.doi.org/10.4028/www.scientific.net/ddf.258-260.59.

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More than twenty years were needed for people to understand the formation mechanism of the periodic-layered structures not only because of the complications of pattern formation, but also due to the limits of traditional diffusion theories. Based on the general theory of interdiffusion growth proposed by Y.C. Chen et al. [1], the quantitative model of periodic layer formation during solid state reactions has been succeeded [2]. The experimental results shown in this paper proved one of the model’s predicts that the reactive diffusion system Zn/Fe3Si with clamp press annealed at 663K should be

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Wróbel, Marek, and Andriy Burbelko. "A Diffusion Model of Binary Systems Controlled by Chemical Potential Gradient." Journal of Casting & Materials Engineering 6, no. 2 (2022): 39–44. http://dx.doi.org/10.7494/jcme.2022.6.2.39.

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The paper presents a model of diffusion in a single phase with chemical potential gradient as the driving force of the process. Fick’s laws are strictly empirical and the assumption that the concentration gradients are the driving forces of diffusion is far from precise. Instead, the gradient of chemical potential μi of component i is the real driving force. The matter of governing equations of models that incorporate this approach will be raised and discussed in this article. One of more important features is the ability to acquire results where diffusion against the concentration gradient ma

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