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51.
L. E. Paramonov 《Optics and Spectroscopy》2012,112(5):787-795
Light scattering by isotropic ensembles of ellipsoidal particles is considered in the Rayleigh-Gans-Debye approximation. It is proved that randomly oriented ellipsoidal particles are optically equivalent to polydisperse randomly oriented spheroidal particles and polydisperse spherical particles. Density functions of the shape and size distributions for equivalent ensembles of spheroidal and spherical particles are presented. In the anomalous diffraction approximation, equivalent ensembles of particles are shown to also have equal extinction, scattering, and absorption coefficients. Consequences of optical equivalence are considered. The results are illustrated by numerical calculations of the angular dependence of the scattering phase function using the T-matrix method and the Mie theory. 相似文献
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V. Paramonov K. Floettmann L. Kravchuk P. Orlov 《Physics of Particles and Nuclei Letters》2014,11(5):636-641
Deflecting RF Structures find applications for the rotation of a bunch of charged particles. The application for transformation of the particle distributions in the bunch results in additional requirements on the quality of the field distribution, i. e. the minimization of aberrations. Referring to the previous methodical analysis, deflecting structures with a reduced level of aberrations are developed both for traveling wave and standing wave operation. 相似文献
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Dong H Paramonov SE Hartgerink JD 《Journal of the American Chemical Society》2008,130(41):13691-13695
The alpha-helical coiled coil is one of the best-studied and most well-understood protein folding motifs. In particular, the coiled coil can be made to self-assemble into a nanofibrous architecture with many potential applications in biomimetic engineering and elsewhere. The key to the assembly of such nanofibers has been the formation of "sticky ended" dimers through careful selection of electrostatically charged amino acids. In this work, we demonstrate for the first time that sticky ended dimers are not a prerequisite for alpha-helical coiled coil nanofiber formation. In contrast, we show that blunt-ended dimers are able to form nanofibers with a uniform diameter of 4 nm while being hundreds of nanometers in length. Furthermore, the length and lateral packing can be controlled through selection of amino acids not involved in the coiled coil interface. 相似文献
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The reactions of 5-[arylamino(methylthio)methylene]pyrimidine-2,4,6(1H,3H,5H)-triones with different aliphatic and aromatic amines were studied. A series of 5-amidinobarbiturates was synthesized. A
new and preparatively convenient method for their synthesis appropriate for the use in the combinatorial chemistry was developed.
Published in Russian in Izvestiya Akademii Nauk. Seriya Khimicheskaya, No. 8, pp. 1557–1563, August, 2007. 相似文献
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V. N. Odinokov V. R. Akhmetova R. G. Savchenko M. V. Bazunova E. A. Paramonov L. M. Khalilov 《Russian Chemical Bulletin》2000,49(6):1103-1105
Ozonides of higher perfluoroalkenes were prepared for the first time by ozonation of perfluorooct-1-and-2-enes in Freon-113. The structures of the resulting compounds were confirmed by13C NMR spectroscopy and GLC-mass spectrometry. 相似文献