排序方式: 共有6条查询结果,搜索用时 31 毫秒
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I. G. Motevich N. D. Strekal A. V. Shulha V. A. Basinski S. A. Maskevich 《Journal of Applied Spectroscopy》2012,79(4):632-636
We have studied the absorption spectra and micrographs of sections of cells of the epithelium and andenocarcinoma of the large intestine, immobilized between standard glass slides and cover glasses and plasmonic silver films. We have shown that when we use a microtome technique and specially selected plasmonic silver films, we can achieve enhancement of the image contrast in analysis of the cell morphology as a result of the increase in the light absorption and scattering cross sections with the contrasting stains hematoxylin and eosin. 相似文献
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Yan Li Alfonso Mangoni Oleksandr Shulha Serhat Sezai Çiçek Christian Zidorn 《Tetrahedron letters》2019,60(32):150930
A first phytochemical investigation of apolar natural products of the seagrass Zostera marina L. (Zosteraceae) yielded cymodienol, a cyclic diarylheptanoid so far only known from the seagrass Cymodocea nodosa (Ucria) Asch. (Cymodoceaceae) and a previously undescribed diaryheptanoid, isotedearene A, which is closely related to tedarene A, a natural product previously described from the neotropic sponge Tedania ignis (Duchassaing & Michelotti, 1864) (Tedaniidae). Structures were established by mass spectrometry and extensive 1D and 2D NMR experiments. 相似文献
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We analyzed how the approach developed for the microindentation of non-uniform elastic solids can be adapted to analyze the atomic force microscopy (AFM) probing of ultrathin (1-100 nm thick) polymer films on a solid substrate, as well as polymer films with a multilayered structure. We suggested that recent Johnson's modification of the contact mechanics model that included a viscoelastic contribution could also be utilized to analyze rate-dependent loading data for polymer surfaces. The graded model proposed for microindentation experiments was modified allowing to account not only for variable elastic moduli within different layers but also for the gradient of properties between layers within a transition zone. Two examples of a recent application of this model for molecularly thick hyperbranched polymer monolayers (<3 nm thick) and tri-layered polymer films (20-40 nm thick) tethered to a solid substrate were presented and discussed. In both cases, complex shapes of both loading curves and elastic modulus depth profiles obtained from experimental AFM data were successfully fitted by the graded model with realistic structural parameters. 相似文献
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Kateryna Prysiazhniuk Oleksandr P. Datsenko Oleksandr Polishchuk Stanislav Shulha Oleh Shablykin Yelyzaveta Nikandrova Kateryna Horbatok Iryna Bodenchuk Petro Borysko Dmytro Shepilov Iryna Pishel Vladimir Kubyshkin Pavel K. Mykhailiuk 《Angewandte Chemie (Weinheim an der Bergstrasse, Germany)》2024,136(9):e202316557
The spiro[3.3]heptane core, with the non-coplanar exit vectors, was shown to be a saturated benzene bioisostere. This scaffold was incorporated into the anticancer drug sonidegib (instead of the meta-benzene), the anticancer drug vorinostat (instead of the phenyl ring), and the anesthetic drug benzocaine (instead of the para-benzene). The patent-free saturated analogs obtained showed a high potency in the corresponding biological assays. 相似文献
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