Statistical Mechanics and Dynamics

Eyring, Henry; Henderson, Douglas; Stover, Betsy J.; Eyring, Edward M.; Seeger, Raymond J.

doi:10.1119/1.1973944

Cited by 68 publications

(48 citation statements)

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“…), and W is the number of a priori equally probable states accessible to the system (Eyring et al 1964). W is the volume in phase space occupied by a particular state of a molecular system.…”

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confidence: 99%

Elastin: a representative ideal protein elastomer

Urry

Hugel

Seitz

et al. 2002

Phil. Trans. R. Soc. Lond. B

288

255

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During the last half century, identification of an ideal (predominantly entropic) protein elastomer was generally thought to require that the ideal protein elastomer be a random chain network. Here, we report two new sets of data and review previous data. The first set of new data utilizes atomic force microscopy to report single-chain force-extension curves for (GVGVP) 251 and (GVGIP) 260 , and provides evidence for single-chain ideal elasticity. The second class of new data provides a direct contrast between lowfrequency sound absorption (0.1-10 kHz) exhibited by random-chain network elastomers and by elastin protein-based polymers.Earlier composition, dielectric relaxation (1-1000 MHz), thermoelasticity, molecular mechanics and dynamics calculations and thermodynamic and statistical mechanical analyses are presented, that combine with the new data to contrast with random-chain network rubbers and to detail the presence of regular non-random structural elements of the elastin-based systems that lose entropic elastomeric force upon thermal denaturation.The data and analyses affirm an earlier contrary argument that components of elastin, the elastic protein of the mammalian elastic fibre, and purified elastin fibre itself contain dynamic, non-random, regularly repeating structures that exhibit dominantly entropic elasticity by means of a damping of internal chain dynamics on extension.

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mentioning

confidence: 99%

Elastin: a representative ideal protein elastomer

Urry

Hugel

Seitz

et al. 2002

Phil. Trans. R. Soc. Lond. B

288

255

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show abstract

“…Em mecânica estatística a função entropia de um sistema isolado num estado de equilíbrio será representada pela letra σ.Usando um formalismo clássico [1,[3][4][5][6][7][8] temos a função entropia clássica σ c definida por…”

Section: A Entropia σ Em Mecânica Estatísticaunclassified

“…Usando o formalismo quântico [1,[3][4][5][6][7][8] temos a função entropia quântica σ q definida por…”

Section: A Entropia σ Em Mecânica Estatísticaunclassified

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Entropia, reversibilidade, irreversibilidade, equação de transporte e teorema H de Boltzmann e o teorema do retorno de Poincaré

Cattani¹,

Bassalo²

2008

Rev. Bras. Ensino Fís.

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Neste trabalho analisamos as conexões entre entropia, reversibilidade, irreversibilidade, teorema H e equação de transporte de Boltzmann e o teorema de retorno de Poincaré. Estes tópicos são estudados separadamente em muitos artigos e livros, mas não são em geral analisados em conjunto mostrando as relações entre eles como fizemos aqui. Procuramos redigir o artigo didaticamente seguindo um caminho que achamos ser o mais simples possível a fim de tornar o conteúdo acessível aos alunos de graduação de física. Palavras-chave: reversibilidade, irreversibilidade, teorema H de Boltzmann, teorema do retorno de Poincaré, equação de transporte.In this paper we have analyzed the connections between entropy, reversibility, irreversibility, the H theorem and transport equation of Boltzmann and the Poincaré's recurrence theorem. These topics are usually studied separatelly in many papers and books, but they are not analyzed globally in order to obtain the connections between them as we have done here. We have written the paper following a simple and didactic approach in order to have a readable text to undergraduate physics students.

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“…This assumption is a simple case of regular solu tion (GUGGENHEIM, 1952;EYRING et al, 1966). Obviously M(r1, r2) is rather constant with respect to the composition of the mixture but dependent on ionic radii of components.…”

Section: Theorymentioning

confidence: 99%

A theoretical attempt to interpret patterns of trace element partitioning in silicate minerals.

Kanno

1977

Geochem. J.

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Using the conformal solution theory of molten salts (REISS et al., 1962;DAVIS and RICE, 1964;BLANDER, 1967), an attempt was made to interpret the patterns of the partition coefficients of trace elements in silicate minerals as a function of ionic radius. It is shown that the partition coefficient is represented to the zeroth order approximation by the quadratic equation of ionic radius in a "simple" homovalent substitution where host and guest cations are of primarily ionic nature. Pressure effects on the partition coefficient of a trace component are qualitatively discussed with emphasis on the inter relationship of melting points between major and minor components.

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Statistical Mechanics and Dynamics

Cited by 68 publications

References 0 publications

Elastin: a representative ideal protein elastomer

Elastin: a representative ideal protein elastomer

Entropia, reversibilidade, irreversibilidade, equação de transporte e teorema H de Boltzmann e o teorema do retorno de Poincaré

A theoretical attempt to interpret patterns of trace element partitioning in silicate minerals.

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