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Shenyang, China

Shenyang Agricultural University is a university in Shenyang, Liaoning, China under the provincial government. Wikipedia.


Lv Q.Y.,ShenYang Agricultural University
Xi bao yu fen zi mian yi xue za zhi = Chinese journal of cellular and molecular immunology | Year: 2011

To explore the purification methods of wild-type and recombinant suilysin and to evaluate their biological activities. Wild-type suilysin was purified by ammonium sulfate precipitation, anion-exchange chromatography and hydrophobic chromatography in turn, while recombinant suilysin was first refolded and purified by immobilized metal ion affinity chromatography, and further purified by Thiopropyl Sepharose 6B. The biological activities were evaluated by hemolysis test, cytotoxicity assay. Both prepared wild-type and recombinant suilysin, with purify over 90%, have hemolysis activity and could injure target cells at high concentration while cholesterol could completely inhibit their activities. Recombinant suilysin has similar biological activities with wild-type suilysin, and this work contributed to further study the functions of suilysin on pathogenesis of steptococcus suis. Source


Zhang Y.,ShenYang Agricultural University
Physics Letters, Section A: General, Atomic and Solid State Physics | Year: 2013

Whether Wada basins of strange nonchaotic attractors (SNAs) can exist has been an open problem. Here we verify the existence of Wada basin for SNAs in a quasiperiodically forced Duffing map. We show that the SNAsÊ basins are full Wada for a set of parameters of positive measure. We identify two types of SNAsÊ Wada basins by the basin cell method. It suggests that SNAs cannot be predicted reliably for the specific initial conditions. © 2013 Elsevier B.V. Source


Zhang Y.,ShenYang Agricultural University | Luo G.,Lanzhou Jiaotong University
Physics Letters, Section A: General, Atomic and Solid State Physics | Year: 2013

The partially Wada basin boundaries are referred to the coexistence of Wada points and non-Wada points in the same basin boundary. We demonstrate two types of Wada bifurcations and analyze the transitions from totally Wada basins to partially Wada basins and from totally Wada basins to totally Wada basins in a two-dimensional cubic map. We describe some numerical experiments giving the evidence of partially Wada basin boundaries. Our results show that the basin cell erosion and the basin cell bifurcation can induce the Wada basin boundary metamorphoses. © 2013 Elsevier B.V. Source


Zhang Y.,ShenYang Agricultural University | Zhang Y.,Northeastern University China
Physica D: Nonlinear Phenomena | Year: 2013

We demonstrate strange nonchaotic attractors with Wada basins (SNAsWB), and verify the abundance of SNAsWB in a quasiperiodically forced Holmes map. We identify the routes to the creation of the SNAsWB in a two-parameter space. The SNAsWB are characterized by the maximal Lyapunov exponent, by the estimation of the phase sensitivity exponent, and by the singular-continuous spectra. We observe that the SNAs' basins are totally Wada basins in a large range of parameters. The topological structures of the SNAs' Wada basins are distinguished by the basin cell method. We investigate the underlying mechanism for the abundance of SNAsWB, which is responsible for different types of basin cell in the absence of forcing. This suggests that the SNAs cannot be predicted reliably for specific initial conditions. These SNAsWB can thus be expected to occur more commonly in dynamical systems. © 2013 Elsevier B.V. All rights reserved. Source


Zhang Y.,ShenYang Agricultural University
Nonlinear Dynamics | Year: 2013

Whether Wada basin boundaries can occur typically in dynamical systems other than smooth systems has been an open question. We verify the existence of Wada basin boundaries in a switched Hénon map. We combine two basin boundaries (non-Wada property) but when they are alternated in periodic manners the Wada basin boundaries can be created. We give some mathematically rigorous results guaranteeing these emerging Wada basin boundaries by the auxiliary dynamics method. It suggests that switching can also induce the consequence of the existence of a high number of possible final states. © 2013 Springer Science+Business Media Dordrecht. Source

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