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151.
Kashif Maqbool Khan Lutfun Nahar Abdul Mannan Muhammad Arfan Ghazanfar Ali Khan Glyn Hobbs 《Natural product research》2018,32(3):346-349
Asparagus adscendens Roxb. (Asparagaceae), is native to the Himalayas. The present study, for the first time, was undertaken to explore the antimicrobial potential, to determine the minimum inhibitory concentration (MIC) values of the methanol extract of the roots of A. adscendens and its solid-phase extraction (SPE) fractions using resazurin microtitre assay against Gram-positive and negative bacterial-registered strains and to carry out HPLC-photodiode array analysis of the SPE fractions. The methanol extract and all SPE exhibited considerable level of antibacterial potential against Gram-positive bacteria (MIC: 2.5–0.009 mg/mL) than against Gram-negative bacteria (MIC: 1.25–2.5 mg/mL). The use of microtitre plates has the advantage of lower cost, fast and quantitative results. Like other Asparagus species, the presence of phenolic compounds in all SPE fractions was evident in the HPLC-PDA data. 相似文献
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A Nash-based collusive game among a finite set of players is one in which the players coordinate in order for each to gain
higher payoffs than those prescribed by the Nash equilibrium solution. In this paper, we study the optimization problem of
such a collusive game in which the players collectively maximize the Nash bargaining objective subject to a set of incentive
compatibility constraints. We present a smooth reformulation of this optimization problem in terms of a nonlinear complementarity
problem. We establish the convexity of the optimization problem in the case where each player's strategy set is unidimensional.
In the multivariate case, we propose upper and lower bounding procedures for the collusive optimization problem and establish
convergence properties of these procedures. Computational results with these procedures for solving some test problems are
reported.
It is with great honor that we dedicate this paper to Professor Terry Rockafellar on the occasion of his 70th birthday. Our
work provides another example showing how Terry's fundamental contributions to convex and variational analysis have impacted
the computational solution of applied game problems.
This author's research was partially supported by the National Science Foundation under grant ECS-0080577.
This author's research was partially supported by the National Science Foundation under grant CCR-0098013. 相似文献
156.
Jamie K. Hobbs Alex K. Winkel Terence J. McMaster Andrew D.L. Humphris Andrew A. Baker Stephen Blakely Meriem Aissaoui Mervyn J. Miles 《Macromolecular Symposia》2001,167(1):1-14
Some recent advances in the application of atomic force microscopy to crystalline polymers are detailed. Ultra‐high resolution imaging of crystal surfaces, combined with the analysis of computer generated Connolly surfaces, enables the unambiguous identification of features on the cellulose crystal surface at near‐atomic resolution. The electronic enhancement of the quality factor of the cantilever when tapping in liquids enables a considerable improvement in force sensitivity to be obtained, allowing the fully saturated surface of an isotactic polystyrene gel to be imaged under the solvating molecule, at nanometre resolution. A series of experiments are detailed in which processes such as crystallization, crystal thickening and crystal deformation are followed in situ, in real time, providing significant new insights into long standing problems in polymer science. 相似文献