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OALib Journal期刊

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Sporting Authenticity
Michael Moller
Cultural Studies Review , 2011,
Abstract: A review of Barry Smart, The Sport Star: Modern Sport and the Cultural Economy of Sporting Celebrity (Sage, Thousand Oaks and London, 2005).
Release of Brain Mitochondrial Hexokinase by Acidic Proteins and Macromolecular Polyanions
F. Moller
Quantitative Biology , 2005,
Abstract: Preparations of arachidonic acid binding and non-binding proteins from bovine brain, four acidic proteins (alpha-casein, phosvitin, beta-lactoglobulin A and B), the peptide polyglutamate, and two polyanions (heparin, dextran sulfate) enhanced both basal and glucose 6-phosphate induced solubilization of rat brain mitochondrial hexokinase (ATP:D-hexose 6-phosphotransferase, EC 2.7.1.1). In contrast, three other acidic proteins, had little (alpha-lactalbumin) or no effect (bovine serum albumin, ovalbumin) and five basic proteins inhibited release of the enzyme. Solubilizing activity therefore appears to require a net negative charge and one or more of the following structural features: extended conformation, random coil, and unordered or beta-structure, in the latter case, as the beta-barrel in the fatty acid binding proteins and beta-lactoglobulins. It is of interest that a difference of a single negative charge between beta-lactoglobulin A and B, resulted in a statistically significant difference in the stimulation of hexokinase release. Possible physiological and pathological roles of this hexokinase solubilizing effect are discussed briefly.
Human embryonic stem cell research, justice, and the problem of unequal biological access
Mark S Moller
Philosophy, Ethics, and Humanities in Medicine , 2008, DOI: 10.1186/1747-5341-3-22
Abstract: Over the past five years the problem of unequal biological access has not received much attention from politicians, bioethicists and even many researchers in the United States, in spite of the widely held belief in the country that there is an obligation to prevent and correct ethnic disparities in access to medical care. The purpose of this paper is to increase awareness of the problem of unequal biological access and of the need to do more than is currently being done to ensure that ethnic disparities in access to human embryonic stem cell-based therapies do not arise.Specifically, this paper explains why the problem of unequal biological access will likely arise in the United States in such a way that white Americans will disproportionately receive most of the benefits of the therapies resulting from human embryonic stem cell research. It also argues for why there is an obligation to prevent these ethnic disparities in access from happening and outlines four steps that need to be taken towards meeting this obligation.In an article published in late 2003, Ruth Faden and eighteen other prominent scientists and bioethicists drew attention to "the problem of unequal biological access" in human embryonic stem cell research [1]. Faden and her colleagues showed that unless deliberate steps are taken in the United States to ensure that the set of human embryonic stem (hES) cell lines available to researchers mirrors the genetic diversity of the general population, there is a good chance that white Americans will receive the therapeutic benefits of this research to the relative exclusion of minority ethnic groups. These authors recognized the injustice of this outcome and rightly stressed our obligation to avoid it.In spite of the efforts of Faden and her colleagues (and others [2]) to draw attention to the problem of unequal biological access, the events of the last five years have shown that many politicians, bioethicists, and even many researchers in the United States
Gênero, o público e o privado
Okin, Susan Moller;
Revista Estudos Feministas , 2008, DOI: 10.1590/S0104-026X2008000200002
Abstract: in this article, the political philosopher susan moller okin discusses the dichotomy public-private from a gendered perspective. overlooking gender - especially as it assumes the form of overlooking the political reality of the family and gender 'neutral' language - has become, in many past and present authors, a reinforcement of that dichotomy, silencing about its patriarchal nature. as okin understands it, domestic (personal) sphere and non-domestic (public) sphere can not be interpreted isolatedly, what demands a deep revision of the base of most liberal political theory. the author faces this demand, discussing important problems such as the value of privacy.
Suid-Afrika se eksperiment met kulturele pluralisme
P.H. Moller
Koers : Bulletin for Christian Scholarship , 1998, DOI: 10.4102/koers.v63i4.543
Abstract:
On the Phase Diagram of QCD with Small Isospin Chemical Potential
Juliane Mirsa Moller
Physics , 2009, DOI: 10.1016/j.physletb.2009.11.060
Abstract: The regime of small isospin chemical potential in QCD is investigated. Using the phase quenched partition function in the $\epsilon$-regime an expression for the chiral condensate is given, which is studied in the temperature isospin chemical potential plane. Lines of constant values of the condensate are shown and it is estimated how the critical temperature varies as a function of the isospin chemical potential. Finally, the dependency of the fermion sign problem on the chemical potential and temperature is examined.
Magnetic multipole analysis of kagome and artificial ice dipolar arrays
Gunnar Moller,R. Moessner
Physics , 2009, DOI: 10.1103/PhysRevB.80.140409
Abstract: We analyse an array of linearly extended monodomain dipoles forming square and kagome lattices. We find that its phase diagram contains two (distinct) finite-entropy kagome ice regimes - one disordered, one algebraic - as well as a low-temperature ordered phase. In the limit of the islands almost touching, we find a staircase of corresponding entropy plateaux, which is analytically captured by a theory based on magnetic charges. For the case of a modified square ice array, we show that the charges ('monopoles') are excitations experiencing two distinct Coulomb interactions: a magnetic 'three-dimensional' one as well as a logarithmic `two dimensional' one of entropic origin.
Artificial square ice and related dipolar nanoarrays
Gunnar Moller,R. Moessner
Physics , 2006, DOI: 10.1103/PhysRevLett.96.237202
Abstract: We study a frustrated dipolar array recently manufactured lithographically by Wang {\em et al.} [Nature {\bf 439}, 303 (2006)] in order to realize the square ice model in an artificial structure. We discuss models for thermodynamics and dynamics of this system. We show that an ice regime can be stabilized by small changes in the array geometry; a different magnetic state, kagome ice, can similarly be constructed. At low temperatures, the square ice regime is terminated by a thermodynamic ordering transition, which can be chosen to be ferro- or antiferromagnetic. We show that the arrays do not fully equilibrate experimentally, and identify a likely dynamical bottleneck.
Brownian shape motion on five-dimensional potential-energy surfaces: Nuclear fission-fragment mass distributions
Jorgen Randrup,Peter Moller
Physics , 2011, DOI: 10.1103/PhysRevLett.106.132503
Abstract: Although nuclear fission can be understood qualitatively as an evolution of the nuclear shape, a quantitative description has proven to be very elusive. In particular, until now, there exists no model with demonstrated predictive power for the fission fragment mass yields. Exploiting the expected strongly damped character of nuclear dynamics, we treat the nuclear shape evolution in analogy with Brownian motion and perform random walks on five-dimensional fission potential-energy surfaces which were calculated previously and are the most comprehensive available. Test applications give good reproduction of highly variable experimental mass yields. This novel general approach requires only a single new global parameter, namely the critical neck size at which the mass split is frozen in, and the results are remarkably insensitive to its specific value.
Acceleration of wind in optically thin and thick black hole accretion disks simulated in general relativity
Anton Moller,Aleksander Sadowski
Physics , 2015,
Abstract: We study the force balance and resulting acceleration of gas in general relativity basing on simulations of accretion on a stellar-mass, non-rotating black hole. We compare properties of acceleration in an optically thin, radiatively inefficient disk, and in an optically thick, super-critical disk accreting at 10 times the Eddington rate. We study both the average forces acting at given location and forces acting on a gas along its individual trajectory. We show that the acceleration is not a continuous process -- in most gases gas is accelerated only in short-lasting episodes. We find that in the case of optically thin disks gas is pushed out by magnetic field in the polar region and by thermal pressure and centrifugal force below the disk surface. In case of optically thick, radiative accretion, it is the radiation pressure which accelerates the gas in the polar funnel and which compensates and sometimes prevails, together with the centrifugal force, the gravity deeper in the disk. We also show that the Newtonian formulae for the forces are inadequate in the innermost and in the highly magnetized regions.
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