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Добірка наукової літератури з теми "Mechano-chemistry"

Автор: Grafiati

Опубліковано: 1 квітня 2023

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Статті в журналах з теми "Mechano-chemistry"

Danielewski, Marek, and Bartłomiej Wierzba. "Mechano-Chemistry; Interdiffusion in Solid Solutions." Defect and Diffusion Forum 277 (April 2008): 61–68. http://dx.doi.org/10.4028/www.scientific.net/ddf.277.61.

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In this work we show that the volume velocity, ρυ , rather than the local centre of mass velocity should be used in continua. We use the volume continuity equation to define the volume frame of reference in the multicomponent, compressible continua. The volume velocity (material velocity) is a unique frame of reference for all internal forces and processes, e.g., the mass diffusion. No basic changes are required in the foundations of linear irreversible thermodynamics except recognizing the need to add volume to the usual list of extensive physical properties undergoing transport in every continuum. The volume fixed frame of reference allows the translation of the Newton’s discrete mass-point molecular mechanics into continuum mechanics and the use of the Cauchy linear momentum equation of fluid mechanics and Navier-Lamé equation of mechanics of solids. Our proposed modifications of Navier-Lamé and energy conservation equations are selfconsistent with the literature for solid-phase continua dating back to the classical interdiffusion experiments of Kirkendall and their subsequent interpretation by Darken in terms of diffusive volume transport. We do show that the local diffusion processes do not change the centre of mass of the system and that the internal stress depends on the gradient of the local volume velocity only.

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Preller, Matthias, and Dietmar J. Manstein. "Myosin Structure, Allostery, and Mechano-Chemistry." Structure 21, no. 11 (November 2013): 1911–22. http://dx.doi.org/10.1016/j.str.2013.09.015.

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Li, Jianwei, Shouzhi Ma, Xinjuan Liu, Zhaofeng Zhou, and Chang Q. Sun. "ZnO Meso-Mechano-Thermo Physical Chemistry." Chemical Reviews 112, no. 5 (February 16, 2012): 2833–52. http://dx.doi.org/10.1021/cr200428m.

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Malik, Omri, Hadeel Kahamis, Sergei Rudnizky, and Ariel Kaplan. "The Mechano-Chemistry of Reverse Transcriptase." Biophysical Journal 112, no. 3 (February 2017): 514a. http://dx.doi.org/10.1016/j.bpj.2016.11.2779.

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Popov, Konstantin I., and Garegin A. Papoian. "Capsid Deformations Reveal Complex Mechano-Chemistry." Biophysical Journal 105, no. 10 (November 2013): 2233–34. http://dx.doi.org/10.1016/j.bpj.2013.09.055.

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Tseng, C. Y., A. Wang, and G. Zocchi. "Mechano-chemistry of the enzyme Guanylate Kinase." EPL (Europhysics Letters) 91, no. 1 (July 1, 2010): 18005. http://dx.doi.org/10.1209/0295-5075/91/18005.

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Danielewski, Marek, and Bartłomiej Wierzba. "Mechano-chemistry; diffusion in multicomponent compressible mixtures." Physica A: Statistical Mechanics and its Applications 387, no. 4 (February 2008): 745–56. http://dx.doi.org/10.1016/j.physa.2007.10.015.

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Malik, Omri, Hadeel Khamis, Sergei Rudnizky, and Ariel Kaplan. "The mechano-chemistry of a monomeric reverse transcriptase." Nucleic Acids Research 45, no. 22 (November 20, 2017): 12954–62. http://dx.doi.org/10.1093/nar/gkx1168.

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Shimojo, F., R. K. Kalia, A. Nakano, K. Nomura, and P. Vashishta. "Metascalable molecular dynamics simulation of nano-mechano-chemistry." Journal of Physics: Condensed Matter 20, no. 29 (June 24, 2008): 294204. http://dx.doi.org/10.1088/0953-8984/20/29/294204.

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Lin, Leqi, Vashin Gautham Nanjangud Thyagaraja, Renoy Ranjith, Ruizhe Yang, Simone Ciampi, James Chen, and Jun Liu. "Degradation of organic molecules by tribovoltaic mechano-chemistry." Nano Energy 107 (March 2023): 108163. http://dx.doi.org/10.1016/j.nanoen.2022.108163.

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Дисертації з теми "Mechano-chemistry"

Jiang, Yue. "Structure-properties relationships in small pi-conjugated molecules : electrochromism, photovoltaic conversion and mechano-fluorochromism." Thesis, Angers, 2015. http://www.theses.fr/2015ANGE0026/document.

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Ce travail porte sur la synthèse et l’évaluation de systèmes pi-conjugués en tant matériaux actifs pour des dispositifs opto(électroniques). Un premier chapitre décrit une série d’oligothiophènes cruciformes et leur évaluation dans des dispositifs électrochromes. Le second chapitre décrit la synthèse d’accepteurs moléculaires à base de benzodithiophène et l’analyse de leur potentialités comme matériaux accepteurs dans des cellules solaires organiques. La plus large part du travail porte sur l’analyse des relations structure-propriétés d’une série de petites molécules push-pull comportant un groupe donneur triphénylamine (TPA) relié à un groupe accepteur par un espaceur thiényl. Une première étape a consisté à remplacer l’un des cycles phényles de la TPA par des groupes aromatiques tels que p-fluorophényle, anthryle et naphtyle. Ces modifications ont peu d’influence sur les propriétés électroniques de la molécule mais induisent de large variations des propriétés de transport de charge et de conversion photovoltaïque des matériaux correspondants. Au cours d’une seconde étape l’un des groupes phényles de la TPA a été remplacé par des chaînes alkyle, perfluoroalkyle et oligo(oxyethylene). Les résultats de diffraction X, spectroscopie d’absorption et de fluorescence, génération de second harmonique et électrochimie démontrent que certaines de ces molécules présentent des propriétés d’émission contrôlées par agrégation tandis que les matériaux correspondants se réorganisent spontanément à l’état solide sous forme d’agrégats H ou J dotés de propriétés de transport de charges et de conversion photovoltaïque fortement améliorées et de propriétés d’absorption, d’émission et de génération de second harmonique mécaniquement modulables
This work deals with the design, synthesis and evaluation of molecular pi-conjugated systems as active materials for (opto)electronics devices. A short first chapter describes three X-shaped oligothiophenes, thecharacterization of their structure and properties and a first evaluation of their performances in electrochromic devices. The second chapter describes the synthesis of molecular acceptors based on a benzodithiophene and the analysis of their potentialities when combined with molecular donors in organic solar cells.The major part of the work is focused on the analysis of structure-properties relationships of a series of smallpush-pull molecules involving di- or tri-arylamine donorblocks linked to an acceptor group by a thienyl bridge. In a first step, a phenyl ring of triphenylamine (TPA) is replaced by p-fluorophenyl, anthryl and naphtyl groups.Optical and electrochemical results show that substitution has little effect at the molecular level but can markedly affect solid-state properties with in particular an improvement of charge-transport and short-circuit current density of solar cells based on these donor materials.In a second step, a phenyl ring of TPA is replaced by alkyl, perfluoroalkyl and oligo(oxyethylene) chains. Results of X-ray diffraction, absorption and photoluminescence spectroscopies, second harmonic generation, and electrochemistry demonstrate that some of these molecules under go aggregation controlled photoluminescence emission wave length while the corresponding materials spontaneous lyre organize in the solid-state to form either H or Jaggregates with enhanced charge mobility, photovoltaic conversion efficiency and mechanically-induced chromism, fluorochromism and NLO-chromism

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Unsal, Emre. "Integrated Real Time Studies to Track all Physical and Chemical Changes in Polyimide Film Processing From Casting to Imidization." University of Akron / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=akron1384129535.

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Частини книг з теми "Mechano-chemistry"

Danielewski, Marek, and Bartłomiej Wierzba. "Mechano-Chemistry; Interdiffusion in Solid Solutions." In Defect and Diffusion Forum, 61–68. Stafa: Trans Tech Publications Ltd., 2008. http://dx.doi.org/10.4028/3-908451-55-8.61.

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Tawada, Katsuhisa, Yasuhiro Imafuku, and Neil Thomas. "Themodynamic Mechano-Chemistry of Single Motor Enzymes." In Advances in Experimental Medicine and Biology, 361–67. Boston, MA: Springer US, 2003. http://dx.doi.org/10.1007/978-1-4419-9029-7_33.

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Danielewski, Marek, Maciej Pietrzyk, and Bartłomiej Wierzba. "Electro-Mechano-Chemistry; Transport Problem in Four Time Scales." In Solid State Phenomena, 11–18. Stafa: Trans Tech Publications Ltd., 2007. http://dx.doi.org/10.4028/3-908451-39-6.11.

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Ciccioli, Piero, Donatella Capitani, Sabrina Gualtieri, Elena Soragni, Girolamo Belardi, Paolo Plescia, and Giorgio Contini. "Mechano-Chemistry of Rock Materials for the Industrial Production of New Geopolymeric Cements." In Factories of the Future, 383–407. Cham: Springer International Publishing, 2019. http://dx.doi.org/10.1007/978-3-319-94358-9_18.

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Claramunt, Rosa M., Concepción López, Dionisia Sanz, and José Elguero. "Mechano Heterocyclic Chemistry: Grinding and Ball Mills∗." In Advances in Heterocyclic Chemistry, 117–43. Elsevier, 2014. http://dx.doi.org/10.1016/b978-0-12-800171-4.00003-2.

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Goldman, Yale E. "Mechano-chemistry of negatively strained cross-bridges in skeletal muscle." In Muscular Contraction, 219–36. Cambridge University Press, 1992. http://dx.doi.org/10.1017/cbo9780511574672.017.

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Тези доповідей конференцій з теми "Mechano-chemistry"

Parfutchik, Ecatherina I., Olga V. Lavrinenko, and Genadiy V. Leonov. "Simulation of Mechano-Physical Chemistry Effects in the Process of Collapsing the Cavitation Bubbles." In 2007 8th Siberian Russian Workshop and Tutorial on Electron Devices and Materials. IEEE, 2007. http://dx.doi.org/10.1109/sibedm.2007.4292991.

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Vernerey, Franck J. "Biophysical Model of the Coupled Mechanisms of Cell Adhesion, Contraction and Spreading." In ASME 2012 Summer Bioengineering Conference. American Society of Mechanical Engineers, 2012. http://dx.doi.org/10.1115/sbc2012-80309.

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Recent research has shown that cell spreading is highly dependent on the contractility of its cytoskeleton and the mechanical properties of its surrounding environment. This extended abstract introduces a mathematical formulation of cell spreading and contraction that couples the processes of stress fiber formation, protrusion growth through actin polymerization at the cell edge and dynamics of cross-membrane protein (integrins) enabling cell-substrate attachment. The evolving cell’s cytoskeleton is modeled as a mixture of fluid, proteins and filaments that can exchange mass and generate contraction. In particular, besides self-assembling into stress fibers, actin monomers are able to polymerize into an actin meshwork at the cell’s boundary in order to push the membrane forward and generate protrusion. These processes are possible via the development of cell-substrate attachment complexes that arise from the mechano-sensitive equilibrium of membrane proteins, known as integrins. Numerical simulations show that the proposed model is able to capture the dependency of cell spreading and contraction on substrate stiffness and chemistry. The very good agreement between model predictions and experimental observations suggests that mechanics plays a strong role into the coupled mechanisms of contraction, adhesion and spreading of adherent cells.

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Tarhini, Ali A., and Ramsey F. Hamade. "Cathodic Disbondment of Rubber/Steel Adhesive Bonds Modeled as Liquid-Solid Reactions." In ASME 2011 International Mechanical Engineering Congress and Exposition. ASMEDC, 2011. http://dx.doi.org/10.1115/imece2011-63307.

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Under cathodic conditions, rubber/steel adhesive bonded joints have been documented to ‘weaken’ due to attack by the generated alkali. If this were to occur under the action of cleavage mechanical loads, the bonds are likely to completely ‘delaminate’ causing the bonded constituents to physically separate. These two modes of disbondment are referred to as ‘weakening’ and ‘delamination’, respectively. Previously, Hamade and coworkers have implemented empirical and semi-empirical approaches to modeling cathodic disbondment of adhesive joints. Here, a method is presented to simulate bond weakening progress via numerical solutions. Bond degradation is modeled as a liquid-solid chemical reactor due to the attack by the alkaline medium. Specifically, the diffusion and chemical reaction processes involved in weakening are mathematically represented via a simplified, 2 partial differential equations (p.d.e.) boundary value problem (BVP). This is a reduced version of the more complex electrochemical formulation needed to fully describe the chemistry at the bondline under cathodic conditions. The weakening model is capable of simulating weakened bond lengths vs. time as function of electrolyte type (artificial sweater, ASW, or 1N NaOH), cathodic potential, and temperature. Furthermore and to model bond delamination, a mechano-chemical failure criterion is incorporated into the weakening formulation effectively coupling fracture mechanics principles with those of cathodic degradation. A fracture mechanics parameter, applied strain energy release rate, G, is used to represent the effect of externally applied loads. The failure criterion stipulates that the bond will delaminate if the applied G exceeds that of the degraded bond’s residual resistance. Both, the weakening and delamination formulations are validated against experimental data of bond weakening and delamination under a variety of conditions. As such, the numerical simulations developed in this work may be used to provide first order estimates of the life of rubber/steel bonded joints (weakened or delaminated lengths vs. time) as function of cathodic parameters and applied G (if the joint is loaded in the case of delamination).

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Звіти організацій з теми "Mechano-chemistry"

Xing, J. Modeling the Mechano-Chemistry of NTPases. Office of Scientific and Technical Information (OSTI), February 2007. http://dx.doi.org/10.2172/902335.

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