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1.
2.
VI. Sedláček 《Czechoslovak Journal of Physics》1988,38(5):465-469
The formation of slip bands is the main mechanism of cyclic deformation in pure Al. Their density, orientation and heights in polycrystalline Al were investigated during cycling. Types, sizes and densities of precipitates are responsible for the mode of cyclic deformation in AlCu4 pure alloy. In technical Al alloys intermetallic phases have detrimental effects on deformation homogeneity and largely govern the fatigue mechanism of the material and especially microcrack initiation. 相似文献
3.
4.
V. I. Nikolaichik A. M. Chaplanov I. I. Khodos S. I. Bagaev N. M. Chekan 《Bulletin of the Russian Academy of Sciences: Physics》2013,77(8):948-950
The structure and composition of nanotubes ≈1.5 μm long and ≈100 nm in diameter, formed electrolytically on the surfaces of titanium plates in a two-electrode cell at room temperature in a 0.5 wt % NH4F solution in ethylene glycol and glycerin, were studied by analytical and diffraction transmission electron microscopy. 相似文献
5.
M. A. Zaporozhets S. V. Savilov O. M. Zhigalina S. N. Sul’yanov V. V. Volkov V. I. Nikolaichik S. P. Gubin A. S. Avilov 《Crystallography Reports》2012,57(3):426-433
Methods for obtaining cadmium selenide and gold nanoparticles have been developed. The sizes of the nanoparticles are determined and the morphology, structure, and chemical composition of these nanoparticles and their ensembles are studied by a complex of structural methods: electron diffraction, X-ray diffraction, energy-dispersive X-ray analysis, high-resolution transmission electron microscopy, and small-angle X-ray scattering. Gold nanoparticles are mainly spherical and have an average size of 10 nm. They are single-phase and have an fcc crystal structure. Samples of synthesized CdSe nanoparticles contain monodisperse spherical particles 12 nm in size with a wurtzite structure. The deposition of nanoparticles on a carbon substrate is accompanied by their self-organization into a closely packed two-dimensional structure with a pronounced texture in which all nanoparticles are oriented in the [001] direction perpendicularly to the carbon substrate plane. 相似文献
6.
A. Ya. Shalyapina A. Yu. Solov’eva M. A. Zaporozhets E. M. Khokhlov V. G. Plotnichenko S. V. Savilov A. V. Egorov V. I. Nikolaichik E. Yu. Buslaeva E. G. Rustamova A. S. Avilov S. P. Gubin 《Russian Journal of Inorganic Chemistry》2013,58(3):354-360
Interactions of ZnO nanoparticles with graphene oxide in isopropanol were studied; graphene oxide was shown to perform as an efficient substrate to immobilize zinc oxide nanoparticles on its surface. Interactions of nanocomposites consisting of graphene oxide-zinc oxide nanoparticles with supercritical isopropanol were studied. The conversion of graphene oxide into graphene does not appreciably changes the composition, morphology, or structure of ZnO nanoparticles. 相似文献
7.
M. A. Zaporozhets D. A. Baranov N. A. Kataeva I. I. Khodos V. I. Nikolaichik A. S. Avilov S. P. Gubin 《Russian Journal of Inorganic Chemistry》2009,54(4):517-520
A simple and available method is proposed for the synthesis of cobalt-containing nanoparticles. This method comprises cobalt formate thermolysis in hydrocarbon oil without extra stabilizing ligands. The size, composition, and structure of the nanoparticles are determined by transmission electron microscopy, X-ray powder diffraction, and electron diffraction. The average particle size is 10–14 nm. The major components are cobalt oxides CoO and Co3O4. Apart from these oxides, the particles contain minor metallic cobalt. 相似文献
8.
A. I. Ivanov R. G. Zhbankov E. A. Korolenko E. V. Korolik L. A. Meleshchenko V. V. Sarnatskaya V. G. Nikolaev V. V. Nikolaichik L. A. Yushko 《Journal of Applied Spectroscopy》1997,64(1):29-35
Differential scanning calorimetry and IR spectrosocopy were used to investigate the effect of the procedure of isolation of
human serum albumin on its physicochemical characteristics. It is shown that fractionation of blood plasma with ethylene glycol
followed by ion exchange chromatography can be used to obtain albumin of normal donors that is similar to the albumin in the
nonfractionated plasma according to melting thermograms. Endotherms of human serum albumin samples that were obtained by affinity
chromatography and preparative electrophoresis are bimodal, unlike the monophasic for albumin obtained by polyethylene glycol
precipitation. These changes result from a higher content of nonetherified fatty acids in the albumin samples obtained by
affinity chromatography and from modification of the secondary protein structure in the samples obtained by electrophoresis.
Analysis of melting thermograms of serum albumin from patients with uremia, chronic hepatitis, and peritonitis shows that
fractionation of blood with polyethylene glycol preserves the thermodynamic characteristics of the various pathological serum
albumins to the greatest extent. The present results demonstrate the advantage of polyethylene glycol fractionation for isolation
of native preparations of normal and “pathological” human serum albumin.
Translated from Zhurnal Prikladnoi Spektroskopii, Vol. 64, No. 1, pp. 32–37, January–February, 1997. 相似文献
9.
A. A. Belyanin V. V. Kocharovsky VI. V. Kocharovsky 《Radiophysics and Quantum Electronics》1996,41(1):22-27
It is believed that the detection of gamma-ray bursts from evaporating primordial black holes is highly improbable in the
near future since the expected photon flux, consisting mainly of photons with energies ≳ GeV, is too low. Contrary to this
point of view, we show that a large fraction of the black hole power at the final stage of evaporation (the last 103 s) can be liberated as a burst of soft γ-ray emission of duration 10−1–103 s and luminosity 1028–1031 erg/s in the energy range 0.1–1 MeV. According to our calculations of the black hole evaporation rate (within the Standard
Model of elementary particles), when the black hole temperature exceeds approximately 10 GeV, the charged particle outflow
from a black hole forms a well-defined plasma and can be described in the hydrodynamic approximation. In this case more than
half of the rest energy of a black hole can be converted into soft gamma-rays due to the presence of the magnetic field with
energy density comparable to that of charged particles. We consider various mechanisms leading to such transformation and
estimate their efficiency. It is shown that, at least, some of the gamma-ray bursts detected by BATSE can be associated with
evaporating black holes.
Institute of Applied Physics, Russian Academy of Sciences, Nizhny Novgorod, Russia. Translated from Izvestiya Vysshikh Uchebnykh
Zavedenii, Radiofizika, Vol. 41, No. 1, pp. 36–45, January, 1998. 相似文献
10.
J. Badalec J. Ďatlov K. Jakubka VI. Kopecký Š. Körbel L. Kryška P. Magula J. Stöckel F. Žáček S. Nanobashvili 《Czechoslovak Journal of Physics》1983,33(7):787-790
The work is devoted to the study of the LH wave effect on the peripheral plasma of the TM-1-MH tokamak. The observed enhancement of the ion saturated current in the limiter shadow is interpreted as heating of the peripheral ions by absorption of decay waves generated in this region due to the nonlinear wave-plasma interaction. 相似文献