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A rapid procedure for synthesis of highly crystalline and pure samples of JDF-L1 without using organics are reactants or templates is described and indexation of the powder X-ray diffraction pattern of this phase is presented. 相似文献
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It is well known that any projective measurement can be decomposed into a sequence of weak measurements, which cause only small changes to the state. Similar constructions for generalized measurements, however, have relied on the use of an ancilla system. We show that any generalized measurement can be decomposed into a sequence of weak measurements without the use of an ancilla, and give an explicit construction for these weak measurements. The measurement procedure has the structure of a random walk along a curve in state space, with the measurement ending when one of the end points is reached. This shows that any measurement can be generated by weak measurements, and hence that weak measurements are universal. This may have important applications to the theory of entanglement. 相似文献
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Dimethyl 2‐{[2‐(methoxycarbonyl)‐1‐(methoxycarbonylmethyl)pyrrol‐4‐yl]methylene}propanedioate
Jan Lokaj Viktor Kettmann Viktor Milata Pavol Hodul Peter Kotta Ognyan Petrov 《Acta Crystallographica. Section C, Structural Chemistry》2001,57(8):973-974
The title compound, C15H17NO8, is a pyrrole–ethene derivative with potential biological activity. Although a large part of the molecule is planar, there is no structural evidence for any conjugation push–pull effect across the ethylenic bond, which is usually observed for substituted ethylenes; π‐electron delocalization appears to be restricted to the 2‐(methoxycarbonyl)pyrrole moiety. 相似文献
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Inside Cover: Selective Protein Hyperpolarization in Cell Lysates Using Targeted Dynamic Nuclear Polarization (Angew. Chem. Int. Ed. 36/2016) 下载免费PDF全文
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In the present paper we provide a multivariate generalization of the Euler–Maclaurin formula which is based on an appropriate multivariate extension of the Bernoulli functions. 相似文献
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The present paper has a twofold contribution: first, we introduce a new concept of Hardy spaces on a multidimensional complexified annular domain which is closely related to the annulus of the Klein–Dirac quadric important in Conformal Quantum Field Theory. Secondly, for functions in these Hardy spaces, we provide error estimate for the polyharmonic Gau?–Jacobi cubature formulas, which have been introduced in previous papers. 相似文献
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Selective Protein Hyperpolarization in Cell Lysates Using Targeted Dynamic Nuclear Polarization 下载免费PDF全文
Thibault Viennet Dr. Aldino Viegas Arne Kuepper Sabine Arens Prof. Dr. Vladimir Gelev Prof. Dr. Ognyan Petrov Prof. Dr. Tom N. Grossmann Prof. Dr. Henrike Heise Dr. Manuel Etzkorn 《Angewandte Chemie (International ed. in English)》2016,55(36):10746-10750
Nuclear magnetic resonance (NMR) spectroscopy has the intrinsic capabilities to investigate proteins in native environments. In general, however, NMR relies on non‐natural protein purity and concentration to increase the desired signal over the background. We here report on the efficient and specific hyperpolarization of low amounts of a target protein in a large isotope‐labeled background by combining dynamic nuclear polarization (DNP) and the selectivity of protein interactions. Using a biradical‐labeled ligand, we were able to direct the hyperpolarization to the protein of interest, maintaining comparable signal enhancement with about 400‐fold less radicals than conventionally used. We could selectively filter out our target protein directly from crude cell lysate obtained from only 8 mL of fully isotope‐enriched cell culture. Our approach offers effective means to study proteins with atomic resolution in increasingly native concentrations and environments. 相似文献