A new rotating gamma system and its clinical applications are introduced, and we compare it with stationary Gamma Knife. The results demonstrate that the former has more advantages than stationary Gamma Knife on radiation dose, processing and cost, etc.
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Computer Simulation of Sulfated Cyclodextrin-Based Enantioselective Separation of Weak Bases With Partial, High-Concentration Filling of the Chiral Selector and Analyte Detection on the Cathodic Side.
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Computer simulation was utilized to characterize the electrophoretic processes occurring during the enantioselective capillary electrophoresis-mass spectrometry (CE-MS) analysis of ketamine, norketamine, and hydroxynorketamine in a system with partial filling of the capillary with 19 mM (equals 5%) of highly sulfated γ-cyclodextrin (HS-γ-CD) and analyte detection on the cathodic side. Provided that the sample is applied without or with a small amount of the chiral selector, analytes become quickly focused and separated in the thereby formed HS-γ-CD gradient at the cathodic end of the sample compartment. This gradient broadens with time, remains stationary, and gradually reduces its span from the lower side due to diffusion such that analytes with high affinity to the anionic selector become released onto the other side of the focusing gradient where anionic migration and defocusing occur concomitantly.
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Universidade Estadual Paulista (UNESP), Câmpus de São João da Boa Vista, Av. Profa. Isette Corrêa Fontão, 505, 13876-750 São João da Boa Vista, SP, Brazil.
A family of dissipative two-dimensional nonlinear mappings is considered. The mapping is described by the angle and action variables and parameterized by ε controlling nonlinearity, δ controlling the amount of dissipation, and an exponent γ is a dynamic free parameter that enables a connection with various distinct dynamic systems. The Lyapunov exponents are obtained for different values of the control parameters to characterize the chaotic attractors.
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Faculty of Clean Technologies, Chemistry& Chemical Engineering Research Center of Iran, Tehran, Iran.
Article Synopsis
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Departamento de Física e Astronomia, Faculdade de Ciências da Universidade do Porto, Rua do Campo Alegre 687, 4169-007 Porto, Portugal.
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