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1.
O. I. Gyrdasova V. N. Krasil’nikov I. G. Grigorov G. V. Bazuev 《Russian Journal of Inorganic Chemistry》2006,51(6):949-955
The effect of ethylene glycol (EG) on the formation of whiskers and fibers of complex oxides with the general formula MCo2O4 upon the thermolysis of M1/3Co2/3C2O4 (M = Zn, Mn) oxalates has been studied. New compounds (solvates) are formed when powdered oxalates are heated with EG. In the solvates, EG molecules substitute for water molecules according to the reaction M1/3Co2/3C2O4 · 2H2O + HOCH2CH2OH = M1/3Co2/3C2O4(HOCH2CH2OH) + 2H2O. The solvates have been characterized using X-ray powder diffraction, microscopy, IR spectroscopy, thermogravimetry, and chemical analysis. The shape, structure, and particle size of the thermolysis products of EG-modified oxalates have been determined using scanning electron microscopy. 相似文献
2.
We investigate some issues of minimax estimation of spectral intensity of acoustic sources in cases when the noise and the spectral amplitudes satisfy quadratic constraints. Recursive minimax filters are obtained.Translated from Vychislitel'naya i Prikladnaya Matematika, No. 58, pp. 116–119, 1986. 相似文献
3.
E. Taskaev M. Karaivanova T. Grigorov 《Journal of Radioanalytical and Nuclear Chemistry》1988,120(1):75-82
A procedure for platinum and gold determination utilizing, neutron activation combined with radiochemical separation, has been developed. The reaction198Pt (n, )199
is used for Pt determination. Four procedures for gold separation are examined: (1) adsorption on untreated polyurethane foam (UPF). (2) extraction with dibutyl sulphide. (3) reduction of gold to elementary state in conc. H2SO4, and extraction of gold as diethyldithiocarbamate complex. The extraction with Cu(DDC)2 is chosen as the most suitable process and applied to platinum and gold determinations in Bowen's Kale and mice organs, previously treated with Biocisplatinum® specimens. 相似文献
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V. V. Glukhikh A. E. Shkuro N. M. Mukhin E. I. Ostanina I. G. Grigorov O. V. Stoyanov 《Polymer Science Series D》2014,7(2):122-126
The effect of vinylacetate unit content in sevilen used as a polymer matrix or polyethylene compatibilizer on the properties of wood-polymer composites with a thermoplastic binders and filler of plant origin is studied. It is shown that the introduction of vinylacetate units decreases the tensile strength, contact elastic modulus, Brinell hardness, and water absorption of the composites, but increases the relative tensile elongation and impact viscosity without notch. 相似文献
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Martin Ferus Svatopluk Civiš Petr Kubelík Václav Nevrlý Petr Bitala Eva Grigorová Michal Střižík Pavel Kubát Zdeněk Zelinger 《Plasma Chemistry and Plasma Processing》2011,31(3):417-426
The environmentally important decomposition of halogenated species CF3Br and CF3CHFCF3 in helium discharge plasma was investigated by time-resolved high-resolution Fourier transform infrared emission spectroscopy.
Contrary to classical pyrolysis, a deeper fragmentation of precursors up to atoms and lower molecular species was observed.
Excited molecular products CF, CF2 and CF4 achieved the maximal concentration in the afterglow. The high concentration of all these species is in agreement with a kinetic
model based on radical chemistry. The non-detectable concentration of CF3 can be connected to its high reactivity and the formation of more stable products, CF4 and CF2, by addition or release of a fluorine atom, respectively. Other products included HF, HBr, CO and cyano compounds that were
produced by secondary reactions with traces of water vapor, atmospheric oxygen and nitrogen present in original industrial
samples as impurities. 相似文献
8.
The conditions for equilibrium of liquid surfaces dividing two anisotropic bulk phases have been deduced by means of variational analysis.It has been shown that the presence of an anisotropic tensor in the bulk requires a gradient of surface tension in a state of equilibrium. 相似文献
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B. N. Sismanoglu K. G. Grigorov R. A. Santos R. Caetano M. V.O. Rezende Y. D. Hoyer V. W. Ribas 《The European Physical Journal D - Atomic, Molecular, Optical and Plasma Physics》2010,60(3):479-487
Linear Stark splitting of the H\(_{\beta}\) Balmer line components and spatially resolved optical emission spectroscopy (OES) measurements were used to estimate the electric field gradient in the cathode sheath region (~70 μm long) of an atmospheric pressure direct current argonflow-stabilized microplasma jet. Also, plasma parameters in the negative glow region were investigated by both OES and electrical diagnostics. The microplasma jet was operated for current ranging from 10 to 110 mA. OH (A2 \({\rm\Sigma}^+\), v = 0 \(\to\) X 2 \({\rm\Pi}\), v’ = 0) rotational bands at 306.357 nm and also the Ar 603.213 nm line were used to determine the gas temperature, which ranges from 600 to 1000 K. Electron number density, ranging from4.1 × 1014 to 8.5 × 1014 cm-3, was determined through analysis of the H\(_{\beta}\) line.Electron excitation temperature was also measured from the ratio of two Mo lines (8500–18?000 K) and from Boltzmann-plot of Ar 4p–4s and 5p–4s transitions (11?000–13?500 K). 相似文献