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The NY-ESO-1 (A39-A68) peptide hydrazide was prepared through 9-fluorenyl-methoxycarbonyl solid-phase peptide synthesis (Fmoc SPPS) from a new 9-fluorenyl-methoxycarbonyl hydrazine 2-chlorotrityl chloride (Fmoc-hydrazine 2CTC) resin. The new resin was ideal for long-term storage and usage in Fmoc SPPS. Besides, the title peptide hydrazide could be transformed nearly quantitatively into the corresponding peptide thioester, which was both isolable and usable directly in native chemical ligation (NCL). 相似文献
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We consider a Lévy stochastic network as a regulated multidimensional Lévy process. The reflection direction is constant on each boundary of the positive orthant and the corresponding reflection matrix corresponds to a single-class network. We use the representation of the Lévy process and Itô's formula to arrive at some equations for the steady-state process; the latter is shown to exist, under natural stability conditions. We specialize first to the class of Lévy processes with non-negative jumps and then add the assumption of self-similarity. We show that the stationary distribution of the network corresponding the the latter process does not has product form (except in trivial cases). Finally, we derive asymptotic bounds for two-dimensional Lévy stochastic network. 相似文献
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本文发现了一种新的反应.吡啶氯化铜络合物(Py2CuCl2)在乙醚中与金属钠作用后,能为卤代烷烃所烃化,反应后将络合物加碱分解,可得到γ-烷基吡啶(主产物)和α-烷基吡啶. 相似文献
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(2-甲基丙烯酰氧乙基)三甲基氯化铵-丙烯酰胺反相微乳液共聚合特性研究 总被引:6,自引:0,他引:6
选用SPAN80与OP10复合乳化剂、K2S2O8-Na2SO3氧化还原引发剂,进行(2-甲基丙烯酰氧乙基)三甲基氯化铵-丙烯酰胺反相微乳液共聚合反应.研究了单体配比、电解质浓度和乳化体系的油水比对共聚物分子量及离子度的影响,考察了该共聚合体系的反应特性. 相似文献
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A common way to inject long-range dependence in a stochastic traffic model possessing a weak regenerative structure is to
make the variance of the underlying period infinite (while keeping the mean finite). This method is supported both by physical
reasoning and by experimental evidence. We exhibit the long-range dependence of such a process and, by studying its second-order
properties, we asymptotically match its correlation structure to that of a fractional Brownian motion. By studying a certain
distributional limit theorem associated with such a process, we explain the emergence of an extremely skewed stable Lévy motion
as a macroscopic model for the aforementioned traffic. Surprisingly, long-range dependence vanishes in the limit, being “replaced”
by independent increments and highly varying marginals. The marginal distribution is computed and is shown to match the one
empirically obtained in practice. Results on performance of queueing systems with Lévy inputs of the aforementioned type are
also reported in this paper: they are shown to be in agreement with pre-limiting models, without violating experimental queueing
analysis.
This revised version was published online in June 2006 with corrections to the Cover Date. 相似文献
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This paper studies the free edge effect yielded by interlaminar stress in a laminated cylindrical shell made up of fiber reinforced layer [0°], [90°] and the isotropic material layer under axisymmetric thermal load or radial pressure. Both ends of the shell are in free boundary condition. The exact solution of the problem can be obtained by using the three-dimensional theory of elasticity. For illustration, the numerical laminar stresses in a double-layer laminated shell under thermal load or radial pressure are calculated. 相似文献
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