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Qiongyou Wu Fanqi Qu Jinqiao Wan Xun Zhu Yi Xia Ling Peng 《Helvetica chimica acta》2004,87(4):811-819
Ribavirin, the only small molecule available so far for treating hepatitis‐C‐virus infection, was recently used in an emergency context to treat patients with severe acute respiratory syndrome (SARS) in the early stages of the disease. To study the mechanisms responsible for the antiviral effects of ribavirin by using a photolabeling approach, we designed, synthesized, and characterized the azidotriazole nucleosides 1 and 2 as photolabeling probes of ribavirin. These probes were synthesized either by performing nucleophilic substitution of the corresponding bromotriazole nucleoside with NaN3 (Scheme 2) or by directly coupling the azidotriazole with the protected ribose sugar (Scheme 4). The azidotriazole nucleosides 1 and 2 showed a fast, clear‐cut photochemical reaction, which suggests that they are promising candidates for use in photolabeling studies. 相似文献
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Dr. Jinqiao Dong Yutong Pan Dr. Heng Wang Dr. Kuiwei Yang Dr. Lingmei Liu Prof. Zhiwei Qiao Yi Di Yuan Shing Bo Peh Dr. Jian Zhang Dr. Leilei Shi Prof. Hong Liang Prof. Yu Han Prof. Xiaopeng Li Prof. Jianwen Jiang Prof. Bin Liu Prof. Dan Zhao 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2020,132(25):10237-10245
The self-assembly of highly stable zirconium(IV)-based coordination cages with aggregation induced emission (AIE) molecular rotors for in vitro bio-imaging is reported. The two coordination cages, NUS-100 and NUS-101, are assembled from the highly stable trinuclear zirconium vertices and two flexible carboxyl-decorated tetraphenylethylene (TPE) spacers. Extensive experimental and theoretical results show that the emissive intensity of the coordination cages can be controlled by restricting the dynamics of AIE-active molecular rotors though multiple external stimuli. Because the two coordination cages have excellent chemical stability in aqueous solutions (pH stability: 2–10) and impressive AIE characteristics contributed by the molecular rotors, they can be employed as novel biological fluorescent probes for in vitro live-cell imaging. 相似文献
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A conceptual model for microscopic-macroscopic slow-fast stochastic systems is considered. A dynamical reduction procedure is presented in order to extract effective dynamics for this kind of systems. Under appropriate assumptions, the effective system is shown to approximate the original system, in the sense of a probabilistic convergence. 相似文献
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A Boussinesq model for the Bénard convection under random influences is considered as a system of stochastic partial differential equations. This is a coupled system of stochastic Navier–Stokes equations and the transport equation for temperature. Large deviations are proved, using a weak convergence approach based on a variational representation of functionals of infinite-dimensional Brownian motion. 相似文献
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本文讨论了一个扰动非线性薛定谔方程对于Stokes波的一类同宿轨道,证明了这类轨道是不存在的。 相似文献
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Nonlinear partial differential equation with random Neumann boundary conditions are considered. A stochastic Taylor expansion method is derived to simulate these stochastic systems numerically. As examples, a nonlinear parabolic equation (the real Ginzburg-Landau equation) and a nonlinear hyperbolic equation (the sine-Gordon equation) with random Neumann boundary conditions are solved numerically using a stochastic Taylor expansion method. The impact of boundary noise on the system evolution is also discussed. 相似文献
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Jinqiao DUAN 《Frontiers of Mathematics in China》2009,4(3):425-436
Model uncertainties or simulation uncertainties occur in mathematical modeling of multiscale complex systems, since some mechanisms
or scales are not represented (i.e., ‘unresolved’) due to a lack in our understanding of these mechanisms or limitations in
computational power. The impact of these unresolved scales on the resolved scales needs to be parameterized or taken into
account. A stochastic scheme is devised to take the effects of unresolved scales into account, in the context of solving nonlinear
partial differential equations. An example is presented to demonstrate this strategy.
Dedicated to Professor Peter E. Kloeden on the occasion of his 60th birthday 相似文献
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