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排序方式: 共有207条查询结果,搜索用时 15 毫秒
71.
Bilgin Simsek Esra Novak Ivan Sausa Ondrej Berek Dusan 《Research on Chemical Intermediates》2017,43(1):503-522
Research on Chemical Intermediates - Cellulose-based microporous carbon fibers (CFs) were evaluated for the adsorption of 2-Chlorophenol (CP), 2,4-Dichlorophenol (DCP), and 2,4,6-Trichlorophenol... 相似文献
72.
Ondrej Stranik Jacqueline Jatschka Andrea Csáki Wolfgang Fritzsche 《Frontiers of Physics》2014,9(5):652-664
Metal nanostructures exhibit special optical resonance modes originating fronl tile subwavelengt.h confinement of conductive electrons in the material. These resonance modes represent a strong research focus due to their application potential in optics and sensing application, in this short review recent achievements of our group in this field are highlighted. A wet-chemistry approach synthesis of advanced metallic nanostruetures will be introduced and their exact positioning and manipulation by electric field is shown. Next. the application of these nanostructures for a detection of small molecules will be described in several examples. Also, it will be shown that inetal nanostruetures can be used for sub-wavelength light focusing and for efficient energy coupling into polymer chains. 相似文献
73.
We developed and implemented an approximation of the state-specific Brillouin-Wigner coupled-cluster method with singles, doubles, and triples, called MRBWCCSDT-alpha, for a general number of closed- and open-shell reference configurations. The accuracy of the method is assessed on the calculation of the oxygen molecule in the X3sigma(g-), a1delta(g), and b1sigma(g+) states and the results of this multireference treatment are compared with previous MRBWCCSD results and with those obtained by the doubly ionized similarity transformed equation-of-motion CCSD and multireference configuration interaction methods and with experimental spectroscopic data. Explicit tests of the size-extensivity of the MRBWCCSDT-alpha method with iterative size-extensivity correction are also performed. 相似文献
74.
Binary and ternary potassium, rubidium and caesium glasses were irradiated by an electron beam with energy varying from 10
to 50 keV. Alkali ion X-ray decays were recorded and afterward incubation periods were determined. The incubation period versus
electron energy curves revealed thresholds, which are typical for each alkali species. The threshold ratios are proportional
to the mass of the alkali species, consistent with the suggested elastic scattering assisted hopping mechanism. 相似文献
75.
Luboš Jankovič Karol Végsö Peter Šiffalovič Ondrej Šauša Lubomír Čaplovič Mária Čaplovičová 《International Journal of Polymer Analysis and Characterization》2016,21(6):524-536
Three different polymer nanocomposites were prepared using clay modified with tetraoctylammonium (4C8) surfactant. The dispersion of clay silicate layers was studied using X-ray diffraction and small-angle scattering. Free-volume cavity sizes were studied with positron annihilation lifetime spectroscopy. Scattering methods confirmed disruption of all polymer lamellae organization upon organoclay addition and the creation of partially intercalated systems for polyamide and polycaprolactone. The presence of organoclay in the polymers enlarges the lower value of average positronium lifetime τ3 of polyamide and reduces the higher value of τ3 for polycaprolactone and polyethylene. 相似文献
76.
Ondrej Kurka 《Proceedings of the American Mathematical Society》2008,136(12):4467-4473
We show that the sets of Fréchet subdifferentiability of Lipschitz functions on a Banach space are Borel if and only if is reflexive. This answers a question of L. Zajíček.
77.
Poterya V Votava O Fárník M Oncák M Slavícek P Buck U Friedrich B 《The Journal of chemical physics》2008,128(10):104313
We report on the first observation of the organoxenon HXeCCH molecule in the gas phase. This molecule has been prepared in a molecular beam experiment by 193 nm photolysis of an acetylene molecule on Xe(n) clusters (n approximately 390). Subsequently the molecule has been oriented via the pseudo-first-order Stark effect in a strong electric field of the polarized laser light combined with the weak electrostatic field in the extraction region of a time-of-flight spectrometer. The experimental evidence for the oriented molecule has been provided by measurements of its photodissociation. For comparison, photolysis of C(2)H(2) on Ar(n) clusters (n approximately 280) has been measured. Here the analogous rare gas molecule HArCCH could not be generated. The interpretation of our experimental findings has been supported by ab initio calculations. In addition, the experiment together with the calculations reveals information on the photochemistry of the HXeCCH molecule. The 193 nm radiation excites the molecule predominantly into the 2 (1)Sigma(+) state, which cannot dissociate the Xe-H bond directly, but the system evolves along the Xe-C coordinate to a conical intersection of a slightly nonlinear configuration with the dissociative 1 (1)Pi state, which then dissociates the Xe-H bond. 相似文献
78.
Ondrej F. K. Kalenda Kenneth Kunen 《Proceedings of the American Mathematical Society》2005,133(2):425-429
Assuming the consistency of the existence of a measurable cardinal, it is consistent to have two Banach spaces, , where is a weak Asplund space such that (in the weak* topology) in not in Stegall's class, whereas is in Stegall's class but is not weak* fragmentable.
79.
Ondrej Hudák 《Physics letters. A》1981,82(2):95-96
A stable 2π-kink solution of the double sine-Gordon equation is described analytically. Commensurate-incommensurate phase transitions in systems corresponding to this equation are continuous. 相似文献
80.