A label-free electrochemical nucleic acid aptasensor for the detection of methamphetamine (MA) by the immobilization of thiolated self-assembled DNA sequences on a gold nanoparticles-chitosan modified electrode is constructed. When MA was complexed specifically to the aptamer, the configuration of the nucleic acid aptamer switched to a locked structure and the interface of the biosensor changed...

‎In this paper‎, ‎we prove that the category of crossed polymodules (i.e‎. ‎crossed modules of polygroups) and their morphisms is finitely complete‎. ‎We‎, ‎therefore‎, ‎generalize the group theoretical case of this completeness property of crossed modules‎.

In calibration experiments, a number of samples of known concentration are used to establish the relationship between a measured response and sample concentration; this relationship is then used to estimate the unknown concentration of further samples from their measured responses. In addition to the estimates themselves, it is useful to have available some measure of their precision, usually g...

We consider the dependence of the entropic solution of a hyperbolic system of conservation laws { ut + f(u)x = 0 u(0, ·) = u0 on the flux function f . We prove that the solution in Lipschitz continuous w.r.t. the C norm of the derivative of the perturbation of f . We apply this result to prove the convergence of the solution of the relativistic Euler equation to the classical limit. Max-Planck-...

In paper [1] the unified approach to the construction of confidence intervals and confidence limits for a signal with a background presence, in particular for Poisson distributions, has been proposed. The method is widely used for the presentation of physical results [2] though a number of investigators criticize this approach [3] In present paper we propose a simple method for construction of ...

Using a recursive approach, we obtain a simple exact expression for the L-distance from the limit in Régnier’s [5] classical limit theorem for the number of key comparisons required by QuickSort. A previous study by Fill and Janson [1] using a similar approach found that the d2-distance is of order between n −1 log n and n, and another by Neininger and Ruschendorf [4] found that the Zolotarev ζ...