Search Results - (Author, Cooperation:J. Talbot)
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1Latest Papers from Table of Contents or Articles in PressR. J. Brienen ; O. L. Phillips ; T. R. Feldpausch ; E. Gloor ; T. R. Baker ; J. Lloyd ; G. Lopez-Gonzalez ; A. Monteagudo-Mendoza ; Y. Malhi ; S. L. Lewis ; R. Vasquez Martinez ; M. Alexiades ; E. Alvarez Davila ; P. Alvarez-Loayza ; A. Andrade ; L. E. Aragao ; A. Araujo-Murakami ; E. J. Arets ; L. Arroyo ; C. G. Aymard ; O. S. Banki ; C. Baraloto ; J. Barroso ; D. Bonal ; R. G. Boot ; J. L. Camargo ; C. V. Castilho ; V. Chama ; K. J. Chao ; J. Chave ; J. A. Comiskey ; F. Cornejo Valverde ; L. da Costa ; E. A. de Oliveira ; A. Di Fiore ; T. L. Erwin ; S. Fauset ; M. Forsthofer ; D. R. Galbraith ; E. S. Grahame ; N. Groot ; B. Herault ; N. Higuchi ; E. N. Honorio Coronado ; H. Keeling ; T. J. Killeen ; W. F. Laurance ; S. Laurance ; J. Licona ; W. E. Magnussen ; B. S. Marimon ; B. H. Marimon-Junior ; C. Mendoza ; D. A. Neill ; E. M. Nogueira ; P. Nunez ; N. C. Pallqui Camacho ; A. Parada ; G. Pardo-Molina ; J. Peacock ; M. Pena-Claros ; G. C. Pickavance ; N. C. Pitman ; L. Poorter ; A. Prieto ; C. A. Quesada ; F. Ramirez ; H. Ramirez-Angulo ; Z. Restrepo ; A. Roopsind ; A. Rudas ; R. P. Salomao ; M. Schwarz ; N. Silva ; J. E. Silva-Espejo ; M. Silveira ; J. Stropp ; J. Talbot ; H. ter Steege ; J. Teran-Aguilar ; J. Terborgh ; R. Thomas-Caesar ; M. Toledo ; M. Torello-Raventos ; R. K. Umetsu ; G. M. van der Heijden ; P. van der Hout ; I. C. Guimaraes Vieira ; S. A. Vieira ; E. Vilanova ; V. A. Vos ; R. J. Zagt
Nature Publishing Group (NPG)
Published 2015Staff ViewPublication Date: 2015-03-20Publisher: Nature Publishing Group (NPG)Print ISSN: 0028-0836Electronic ISSN: 1476-4687Topics: BiologyChemistry and PharmacologyMedicineNatural Sciences in GeneralPhysicsKeywords: Atmosphere/chemistry ; Biomass ; Brazil ; Carbon/analysis/metabolism ; Carbon Dioxide/*analysis/metabolism ; *Carbon Sequestration ; Plant Stems/metabolism ; *Rainforest ; Trees/growth & development/metabolism ; Tropical Climate ; Wood/analysisPublished by: -
2Latest Papers from Table of Contents or Articles in PressY. F. Dagdas ; K. Yoshino ; G. Dagdas ; L. S. Ryder ; E. Bielska ; G. Steinberg ; N. J. Talbot
American Association for the Advancement of Science (AAAS)
Published 2012Staff ViewPublication Date: 2012-06-23Publisher: American Association for the Advancement of Science (AAAS)Print ISSN: 0036-8075Electronic ISSN: 1095-9203Topics: BiologyChemistry and PharmacologyComputer ScienceMedicineNatural Sciences in GeneralPhysicsKeywords: Actin Cytoskeleton/*physiology/ultrastructure ; Actins/*metabolism ; Cell Membrane/metabolism/ultrastructure ; Diffusion ; Fungal Proteins/chemistry/genetics/*metabolism ; Magnaporthe/genetics/*pathogenicity/physiology/ultrastructure ; Microfilament Proteins/metabolism ; Mutation ; Oryza/*microbiology ; Phosphatidylinositols/metabolism ; Plant Diseases/*microbiology ; Plant Leaves/microbiology ; Protein Interaction Domains and Motifs ; Recombinant Fusion Proteins/metabolism ; Septins/*chemistry/genetics/*metabolism ; cdc42 GTP-Binding Protein/metabolismPublished by: -
3FIS Bildung LiteraturdatenbankStaff View
Type of Medium: articlePublication Date: 1984Keywords: Interaktion ; Didaktische Grundlageninformation ; Linguistik ; Literatur ; Textanalyse ; Textlinguistik ; Fremdsprachenunterricht ; Stilistik ; Literaturbericht ; ÜbersichtIn: Journal of literary semantics, Bd. 13 (1984) H. 1, S. 57-79, 0341-7638Language: EnglishNote: Literaturangaben -
4Articles: DFG German National LicensesViot, P. ; Tarjus, G. ; Ricci, S. M. ; Talbot, J.
College Park, Md. : American Institute of Physics (AIP)
Published 1992Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: We study the random sequential adsorption (RSA) of unoriented anisotropic objects onto a flat uniform surface, for various shapes (spherocylinders, ellipses, rectangles, and needles) and elongations. The asymptotic approach to the jamming limit is shown to follow the expected algebraic behavior, θ(∞)−θ(t)∼t−1/3, where θ is the surface coverage; this result is valid for all shapes and elongations, provided the objects have a nonzero proper area. In the limit of very small elongations, the long-time behavior consists of two successive critical regimes: The first is characterized by Feder's law, t−1/2, and the second by the t−1/3 law; the crossover occurs at a time that scales as ε−1/2 when ε→0, where ε is a parameter of anisotropy. The influence of shape and elongation on the saturation coverage θ(∞) is also discussed. Finally, for very elongated objects, we derive from scaling arguments that when the aspect ratio α of the objects becomes infinite, θ(∞) goes to zero according to a power law α−p, where p=1/(1+2(square root of)2). The fractal dimension of the system of adsorbed needles is also discussed.Type of Medium: Electronic ResourceURL: -
5Articles: DFG German National LicensesRicci, S. M. ; Talbot, J. ; Tarjus, G. ; Viot, P.
College Park, Md. : American Institute of Physics (AIP)
Published 1992Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: We study the kinetics of random sequential adsorption (RSA) of anisotropic bodies (rectangles, ellipses, spherocylinders or, more precisely, discorectangles, and needles) at low-to-intermediate coverages. In this regime, the adsorption probability can be expressed as a power series in the coverage. We calculate numerically the second- and third-order coefficients of the series and compare the results to simulation data. The results for the low-coverage kinetics are then combined with the asymptotic results of Paper I [J. Chem. Phys. 97, xxxx (1992)] to construct approximate equations for the adsorption probability over the entire coverage range. While the equations provide a reasonably good description of the RSA kinetics, they produce unsatisfactory estimates of the saturation coverages. The effect of particle shape on the adsorption kinetics and surface structure is discussed. Finally, the available surface function is compared with that corresponding to equilibrium configurations of the adsorbed particles.Type of Medium: Electronic ResourceURL: -
6Articles: DFG German National LicensesSenger, B. ; Schaaf, P. ; Voegel, J. C. ; Johner, A. ; Schmitt, A. ; Talbot, J.
College Park, Md. : American Institute of Physics (AIP)
Published 1992Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: Irreversible adsorption of hard spheres onto a solid surface is analyzed by using a generalization of the "random sequential adsorption'' (RSA) model: "diffusion random sequential adsorption'' (DRSA). In addition to the irreversible nature of the adsorption process and exclusion effects of the adsorbed configurations of hard spheres, the new model also considers the interactions between adsorbed particles and particles from the bulk, diffusing toward the surface. It is shown, in particular, that this affects the structure of adsorbed configurations for coverages different from the jamming limit coverage θ∞. Surprisingly, θ∞ appears to be identical for configurations generated by RSA and DRSA algorithms. Moreover, the structures of the configurations, as characterized by the radial distribution function g(r), are also identical at the jamming limit, whereas they differ for lower coverages. The coupling between the bulk diffusion process and the "adsorption process'' is also analyzed as a function of the coverage. New approximate boundary conditions at the interface for the adsorption–diffusion equations are derived and the adsorption rate is calculated for a particular example.Type of Medium: Electronic ResourceURL: -
7Articles: DFG German National LicensesTarjus, G. ; Schaaf, P. ; Talbot, J.
College Park, Md. : American Institute of Physics (AIP)
Published 1990Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: Adsorption of hard spherical particles onto a flat uniform surface is analyzed by using generalized random sequential adsorption (RSA) models. These models are defined by releasing the condition of immobility present in the usual RSA rules to allow for desorption or surface diffusion. Contrary to the simple RSA case, generalized RSA processes are no longer irreversible and the system formed by the adsorbed particles on the surface may reach an equilibrium state. We show by using a distribution function approach that the kinetics of such processes can be described by means of an exact infinite hierarchy of equations reminiscent of the Kirkwood–Salsburg hierarchy for systems at equilibrium. We illustrate the way in which the systems produced by adsorption/desorption and by adsorption/diffusion evolve between the two limits represented by "simple RSA'' and "equilibrium'' by considering approximate solutions in terms of truncated density expansions.Type of Medium: Electronic ResourceURL: -
8Articles: DFG German National LicensesReiss, H. ; Tabazadeh, A. ; Talbot, J.
College Park, Md. : American Institute of Physics (AIP)
Published 1990Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: A statistical mechanical theory is developed to demonstrate that the appropriate (natural and consistent) physical cluster (to be used in a molecular theory of the nucleation of drops in supersaturated vapor far from the critical temperature) is that introduced by Reiss, Katz, and Cohen as well as by Lee, Barker, and Abraham—modified to account for the effects of the surrounding vapor. This modification allows the constraining spherical shell centered on the cluster's center of mass to not be a constraint at all, but only a procedural device for organizing the derivation. Indeed, the shell can have variable volumes, natural to the system. The properties of the nucleus can then be established in a truly consistent molecular manner by Monte Carlo simulation. It appears as though the new development represents a very substantial advance in the molecular theory of vapor phase nucleation.Type of Medium: Electronic ResourceURL: -
9Articles: DFG German National LicensesStaff View
ISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: Most of the adsorption experiments of proteins on solid surfaces are interpreted with the Langmuir kinetic equation. We show that this equation does not accurately describe the surface exclusion effect. We propose improvements in two limiting cases; (i) the particles, once adsorbed, can diffuse rapidly on the surface; (ii) the particles can neither diffuse on the surface, nor desorb from it; the so called random sequential adsorption (RSA) model. In the last case, we compare our results with computer simulations.Type of Medium: Electronic ResourceURL: -
10Articles: DFG German National LicensesTalbot, J. ; Kivelson, D. ; Allen, M. P. ; Evans, G. T. ; Frenkel, D.
College Park, Md. : American Institute of Physics (AIP)
Published 1990Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: Molecular-dynamics calculations are reported on fluids of hard ellipsoids over a range of densities and for several ellipsoidal aspect ratios. The pair correlation functions obtained from the simulations are expressed as functions of the minimum surface-to-surface separation, s, measured along the surface normal, sˆ, and angles measured relative to the surface normal. Both isotropic and orientational correlations exhibit simpler behavior in the surface-to-surface than in the more customary center-to-center coordinate representation. For the hard-ellipsoid fluid, the isotropic part of the pair correlation function, giso(s), behaves much like that of a hard-sphere fluid. The surface-to-surface coordinates are well suited for studying pressure and collision rates because these properties depend upon surface contact distributions. They are also useful for studying the orientational order parameter, g2, because they enable one to readily identify a long-range part and geometrical excluded volume contribution.Type of Medium: Electronic ResourceURL: -
11Articles: DFG German National LicensesTalbot, J. ; Bereolos, P. ; Chao, K. C.
College Park, Md. : American Institute of Physics (AIP)
Published 1993Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: A new method for calculating the free energy in Monte Carlo simulations without the use of particle insertion is discussed. It is shown that while the method is exact, its implementation with one particle sampling requires an approximation. The validity of the approximation is examined by studying a one-dimensional Ising model.Type of Medium: Electronic ResourceURL: -
12Articles: DFG German National LicensesChoi, H. S. ; Talbot, J. ; Tarjus, G. ; Viot, P.
College Park, Md. : American Institute of Physics (AIP)
Published 1993Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: We present a computer simulation and theoretical study of a ballistic deposition process in which spheres are incident on a planar surface. Each incoming sphere follows a path of steepest descent which may involve rolling over the surface of preadsorbed spheres. All particles reaching a stable, elevated position are removed. The frequency of the various rolling mechanisms are evaluated as a function of coverage. The addition mechanism generates clusters of connected spheres by accretion and coalescence. We evaluate the dependence of the cluster size distribution and coalescence probability on coverage. Various peaks in the radial distribution function of the deposited layer provide a signature for the deposition mechanism. The asymptotic approach to saturation is shown to be of the form θ∞−θ(t) ∝exp[−(4/π)Smt]/t2, where Sm=(square root of)3/2 is the smallest possible target area. The expression is shown to be consistent with the simulation results. Interpolants, which accurately describe the time-dependent coverage over the entire coverage range, are developed based on the exact expressions for the asymptotic and low coverage kinetics.Type of Medium: Electronic ResourceURL: -
13Articles: DFG German National LicensesWood, C. ; Leeton, J. ; Talbot, J. Mc. ; Trounson, A. O.
Oxford, UK : Blackwell Publishing Ltd
Published 1981Staff ViewISSN: 1471-0528Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: MedicineNotes: Mature oocytes may be obtained from 85 per cent of preovulatory follicles at laparoscopy. The technique of oocyte collection is described. The most important factors contributing to the success rate are surgical expertise and a satisfactory aspiration System.Type of Medium: Electronic ResourceURL: -
14Articles: DFG German National LicensesBoyer, D. ; Tarjus, G. ; Viot, P. ; Talbot, J.
College Park, Md. : American Institute of Physics (AIP)
Published 1995Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: Random sequential addition is a process that generates nonequilibrium configurations of hard objects. The corresponding spatial pair correlations are investigated via a Percus–Yevick (PY)-like integral equation. Numerical solutions are obtained in one, two, and three dimensions. Comparison with exact results in one dimension and with Monte Carlo data in higher dimensions shows that the PY-like integral equation provides an accurate description of the structure, except close to the jamming limit, where the logarithmic divergence of the correlation function at contact is not reproduced. Using diagrammatic expansions, we show that in one dimension, contrary to its equilibrium counterpart, this equation is only exact up to the second order in density. © 1995 American Institute of Physics.Type of Medium: Electronic ResourceURL: -
15Articles: DFG German National LicensesRicci, S. M. ; Talbot, J. ; Tarjus, G. ; Viot, P.
College Park, Md. : American Institute of Physics (AIP)
Published 1994Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: The structure of two-dimensional configurations of spherocylinders (discorectangles) generated by random sequential adsorption (RSA) is analyzed via the circular harmonic expansion of the pair distribution function and compared to that of equilibrium fluids at the same density. The structural differences are minimal for short particles but become more pronounced as the aspect ratio of the particles increases. An analysis of the correlations between particles which adsorb at high coverage with their nearest neighbors in saturated RSA configurations, reveals that the most probable relative orientation for particles with aspect ratio α≈2 is perpendicular. This observation helps to explain the maximum in saturation coverage as a function of particle elongation near the aspect ratio α=2.Type of Medium: Electronic ResourceURL: -
16Articles: DFG German National LicensesTalbot, J. ; Lebowitz, J. L. ; Waisman, E. M. ; Levesque, D. ; Weis, J.-J.
College Park, Md. : American Institute of Physics (AIP)
Published 1986Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: We test some refined perturbation and integral equations theories for predicting the equilibrium properties of spherical fluids, with nonstandard interactions at high densities and temperatures. The perturbation theories are fast and convenient to use and give good results for the thermodynamic properties, but not for the structure. The integral equations require more computer time, but yield thermodynamics and structure that are in very good agreement with simulations. In fact there appears to be no need for computer simulations of classical systems of particles interacting with spherical potentials in the fluid regime—at least away from transitions.Type of Medium: Electronic ResourceURL: -
17Articles: DFG German National LicensesTalbot, J. ; Tildesley, D. J.
College Park, Md. : American Institute of Physics (AIP)
Published 1985Staff ViewISSN: 1089-7690Source: AIP Digital ArchiveTopics: PhysicsChemistry and PharmacologyNotes: The thermodynamic and structural properties of the planar dumbbell fluid are examined. The Reference Interaction Site Model (RISM) theory in two dimensions is used to calculate the site–site radial distribution functions for a range of elongations and densities. The results are compared with Monte Carlo simulations. This theory also provides a route to the thermodynamic properties. Scaled particle theory, the y expansion of Barboy and Gelbart, and a median potential are also applied to the problem of predicting the thermodynamic properties. The relative merits of the theories are discussed.Type of Medium: Electronic ResourceURL: -
18Articles: DFG German National LicensesFunction of leaf hamamelitol as a compatible solute during water stress treatment of Hedera helix L.Staff View
ISSN: 1365-3040Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: BiologyNotes: Hamamelitol is an unusual branched-chain sugar alcohol previously suggested to function as a leaf compatible solute. In this study, we have examined the leaf metabolism and intracelluiar compartmentalization of hamamelitol and other soluble sugars during long-term water stress treatment of Hedera helix (English ivy). Total leaf hamamelitol content was relatively low in greenhouse control plants, but increased 2-fold during water stress treatment to levels approaching those observed in field-grown plants (6–7 μmol g−1 fresh weight). Using density gradient fractionation with non-aqueous solvents, we showed that hamamelitol occurs primarily in the cytoplasm and vacuoles of leaf mesophyll cells. During water stress treatment most of the increase in leaf hamamelitol occurred in the mesophyll cytoplasm, compensating osmotically for a decrease in cytoplasmic sucrose concentration. The maximum concentration of cytoplasmic hamamelitol was 155 mol m−3 and occurred in field-grown plants. Labelling experiments showed that hamamelitol is slowly synthesized from 14CO2 in leaves of H. helix, but is very long-lived (estimated t1/2 of 4 years). Together, these data indicate that hamamelitol probably functions during long-term stress conditions as an osmotically active, compatible solute in plant leaves. We suggest that the signal for enhanced accumulation of hamamelitol during the water stress treatment was initiated by decreased plant growth and increased leaf sucrose hydrolysis.Type of Medium: Electronic ResourceURL: -
19Articles: DFG German National LicensesDERNER, JUSTIN D. ; JOHNSON, HYRUM B. ; KIMBALL, BRUCE A. ; PINTER, PAUL J. ; POLLEY, H. Wayne ; TISCHLER, CHARLES R. ; BOUTTON, THOMAS W. ; LAMORTE, ROBERT L. ; WALL, GERALD W. ; ADAM, NEIL R. ; LEAVITT, STEVEN W. ; OTTMAN, MICHAEL J. ; MATTHIAS, ALLAN D. ; BROOKS, TALBOT J.
Oxford, UK : Blackwell Science Ltd
Published 2003Staff ViewISSN: 1365-2486Source: Blackwell Publishing Journal Backfiles 1879-2005Topics: BiologyEnergy, Environment Protection, Nuclear Power EngineeringGeographyNotes: We evaluated the influences of CO2[Control, ∼ 370 µmol mol−1; 200 µmol mol−1 above ambient applied by free-air CO2 enrichment (FACE)] and soil water (Wet, Dry) on above- and below-ground responses of C3 (cotton, Gossypium hirsutum) and C4 (sorghum, Sorghum bicolor) plants in monocultures and two density mixtures. In monocultures, CO2 enrichment increased height, leaf area, above-ground biomass and reproductive output of cotton, but not sorghum, and was independent of soil water treatment. In mixtures, cotton, but not sorghum, above-ground biomass and height were generally reduced compared to monocultures, across both CO2 and soil water treatments. Density did not affect individual plant responses of either cotton or sorghum across the other treatments. Total (cotton + sorghum) leaf area and above-ground biomass in low-density mixtures were similar between CO2 treatments, but increased by 17–21% with FACE in high-density mixtures, due to a 121% enhancement of cotton leaf area and a 276% increase in biomass under the FACE treatment. Total root biomass in the upper 1.2 m of the soil was not influenced by CO2 or by soil water in monoculture or mixtures; however, under dry conditions we observed significantly more roots at lower soil depths (〉 45 cm). Sorghum roots comprised 81–85% of the total roots in the low-density mixture and 58–73% in the high-density mixture. CO2-enrichment partly offset negative effects of interspecific competition on cotton in both low- and high-density mixtures by increasing above-ground biomass, with a greater relative increase in the high-density mixture. As a consequence, CO2-enrichment increased total above-ground yield of the mixture at high density. Individual plant responses to CO2 enrichment in global change models that evaluate mixed plant communities should be adjusted to incorporate feedbacks for interspecific competition. Future field studies in natural ecosystems should address the role that a CO2-mediated increase in C3 growth may have on subsequent vegetation change.Type of Medium: Electronic ResourceURL: -
20Articles: DFG German National LicensesStaff View
ISSN: 0009-9120Source: Elsevier Journal Backfiles on ScienceDirect 1907 - 2002Topics: MedicineType of Medium: Electronic ResourceURL:
