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  • 1
    Electronic Resource
    Electronic Resource
    Phase transition in a general continuous Ising model with long-range interactions (1999)
    [S.l.] : American Institute of Physics (AIP)
    Journal of Applied Physics 85 (1999), S. 6088-6090 
    Details
    ISSN: 1089-7550
    Source: AIP Digital Archive
    Topics: Physics
    Notes: Critical exponents for a one-dimensional general continuous Ising model with long-range ferromagnetic interactions decaying as 1/r1+σ are calculated using a histogram Monte Carlo technique. A continuous Ising model means that a spin can take any value between −1 and 1. The critical point behavior is investigated. It is found that the system exhibits a second-order phase transition with nonstandard critical exponents; the singularities in the specific heat and susceptibility depend on σ. For σ=1, there are extremely weak finite size effects: the first-order and the second-order cumulants of the order parameter yield ν=2.42(1). The susceptibility exponent γ=2.259(9). Results for σ=0.7 will be shown and discussed. © 1999 American Institute of Physics.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1063/1.370270
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  • 2
    Electronic Resource
    Electronic Resource
    Effect of Thermal Processing and Carbon Dioxide-assisted High-pressure Processing on Pectinmethylesterase and Chemical Changes in Orange Juice (2003)
    Oxford, UK : Blackwell Publishing Ltd
    Journal of food science 68 (2003), S. 0 
    Details
    ISSN: 1750-3841
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition , Process Engineering, Biotechnology, Nutrition Technology
    Notes: : The effects of high-pressure processing (HPP), CO2-assisted high-pressure processing (HPP + CO2), and thermal processing on the chemical and physical properties of single-strength Valencia orange juice were evaluated over 4 mo of storage at 4 and 30 °C. The HPP + CO2 juice had the greatest cloud stability and highest ascorbic acid retention. Volatile compound losses were lowest in the HPP juice and lower in the HPP + CO2 juice compared to the thermally processed juice (p 〈 0.05). HPP + CO2 produced a cloud-stable orange juice with more ascorbic acid and flavor volatiles than thermally processed juice (p 〈 0.05).
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1111/j.1365-2621.2003.tb09621.x
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  • 3
    Electronic Resource
    Electronic Resource
    Diagonalisation of finite-size corner transfer matrices and related spin chains (1989)
    Springer
    The European physical journal 75 (1989), S. 119-125 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We study Baxter's corner transfer matrices for anisotropic Ising models of finite size. They are related to spin one-half chains with coefficients which increase linearly along the chain. The operators are diagonalised with the help of special polynomials and the eigenvalue spectrum is discussed. The relation to the infinite lattice limit is outlined.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01313574
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  • 4
    Electronic Resource
    Electronic Resource
    Screening in a one dimensional plasma (1980)
    Springer
    The European physical journal 37 (1980), S. 193-202 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We investigate the screening behavior of a neutral one dimensional plasma made up by two types of charges not necessarily of equal values. The thermodynamic potential is given by the lowest eigenvalue of a generalized Mathieu equation. If the latter is interpreted as a Schrödinger equation, the dielectric constant is related in a simple manner to the band mass of the lowest energy band. We calculate this mass with the W.K.B. method and study the correlation function for a pair of test charges.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01323032
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  • 5
    Electronic Resource
    Electronic Resource
    The kinetic Potts chain and related potts models with competing interactions (1986)
    Springer
    Journal of statistical physics 45 (1986), S. 233-244 
    Details
    ISSN: 1572-9613
    Keywords: Potts spin systems ; vertex systems ; competing interactions ; kinetic spin models ; solubility
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We consider a general kinetic model for a chain of three-state Potts spins. From the time-evolution operator we infer points in two-dimensional Potts systems where certain spin correlations have one-dimensional character and the model is exactly solvable. This occurs in square lattice models with different kinds of competing interactions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01033089
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  • 6
    Electronic Resource
    Electronic Resource
    Comparison of optimization methods in planar chromatography (1993)
    Springer
    Chromatographia 35 (1993), S. 102-108 
    Details
    ISSN: 1612-1112
    Keywords: Thin layer chromatography ; Optimization methods ; Spotting techniques ; Mobile phase composition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Notes: Summary The optimisation of chromatographic parameters is studied. The Window Diagram and Overlapping Resolution Map (ORM) methods are compared. The latter is developed to take into account the spot diameter and the average plate height variations with the development distance, in order to improve the reliability of the method.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02278565
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  • 7
    Electronic Resource
    Electronic Resource
    Migration d'acides aromatiques en chromatographie sur couche mince de gel de silice en fonction de la teneur en eau ou en acide formique de solutions créant l'atmosphère de la cuve à chromatographie (1976)
    Springer
    Chromatographia 9 (1976), S. 627-629 
    Details
    ISSN: 1612-1112
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology
    Description / Table of Contents: Résumé Les auteurs étudient la mobilité de divers acides aromatiques sur couche mince de gel de silice en fonction, soit de la teneur en eau de mélanges acide sulfurique-eau, soit de la teneur en acide formique de solutions (eau ou diéthylèneglycolmonoéthyléther) créant l'atmosphère de la cuve à chromatographie. Ils tentent de mettre en évidence les phénomènes de compétition au niveau des sites actifs de la silice entre les acides aromatiques et les agents de conditionnement de la couche mince (eau, acide formique). Ces recherches ont permis la mise au point d'une méthode efficace de séparation d'un certain nombre d'acides aromatiques.
    Notes: Summary The authors study the mobility of some aromatic acids on thin layers of silica gel as a function either of water content of sulphuric acid-water mixtures or of formic acid solutions (water or diethyleneglycolmonoethylether) creating the chromatographic tank atmosphere. They try to demonstrate the competition for active sites on the silica gel between aromatic acids and the conditioning agents of thin layer (water, formic acid). These researches helped to find an efficient method for the separation of some aromatic acids.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02290533
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  • 8
    Electronic Resource
    Electronic Resource
    Corner transfer matrices and conformal invariance (1987)
    Springer
    The European physical journal 69 (1987), S. 385-391 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We study two-dimensional Ising systems at the critical point. Using conformal considerations we derive the spectrum of low-lying eigenvalues of Baxter's corner transfer matrix. Its relation to the spectrum of the usual transfer matrix, its scaling properties and the way the conformal anomaly enters, are discussed.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01307296
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  • 9
    Electronic Resource
    Electronic Resource
    Influence of twinning planes on upper critical fields (1991)
    Springer
    The European physical journal 84 (1991), S. 193-200 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract Within the framework of a Ginzburg-Landau theory for a scalar order parameter, we discuss the effect of the presence of twinning planes on the behavior of the upper critical field as function of the temperature. In particular we study the case of a finite array of planes in the region of weak magnetic field, both from the analytical and the numerical point of view.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01313536
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  • 10
    Electronic Resource
    Electronic Resource
    Ice models and a lattice version of the Dirac equation (1985)
    Springer
    The European physical journal 60 (1985), S. 255-263 
    Details
    ISSN: 1434-6036
    Source: Springer Online Journal Archives 1860-2000
    Topics: Physics
    Notes: Abstract We study ice models as possible realizations for lattice versions of the Dirac equation. The starting point of this analysis is the close connection between the two dimensional ice model of Lieb and the Thirring model of massive fermions in (1+1) dimensions.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01304446
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