共查询到20条相似文献,搜索用时 0 毫秒
1.
Bazhukova I. N. Pustovarov V. A. Myshkina A. V. Ulitko M. V. 《Optics and Spectroscopy》2020,128(12):2050-2068
Optics and Spectroscopy - A review of recent advances in the development of luminescent inorganic nanoparticles doped with rare earth ions, which can be used for biomedical applications, is... 相似文献
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Calcium phosphate (Ca-P) based composites have attracted great attention in the scientific community over the last decade for the development of biomedical applications. Among such Ca-P-based structures, carbonate apatite (CA) and hydroxyapatite (HA) materials have received much attention in the clinical and biomedical fields, mainly because of their unique biological characteristics. These characteristics can promote the biocompatibility of implant materials and osseointegration between the implant and host bone. Various studies have been carried out on the fabrication of Ca-P coatings on orthopedic and dental implants using the micro-arc oxidation (MAO) process; however, there has not been a comprehensive review of the control of MAO parameters to achieve an optimal coating structure. This article presents a critical analysis of the synthesis techniques that have been adopted for the fabrication of Ca-P-based coatings on both commercially pure titanium (CP-Ti) and biomedical grade Ti alloys. Moreover, this work elucidates the influence of MAO processing parameters such as electrolyte concentration, pH value, voltage, and time on the crystal structure and surface morphology of Ca-P coatings. It is shown that the surface thickness, crystal structure, and surface morphology of Ca-P coatings directly influence their biocompatibility. 相似文献
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V. A. Barachevsky 《Optics and Spectroscopy》2018,124(3):373-407
The results of studies that have been performed over the last decade in the field of development of silver halide and nonsilver holographic recording media of organic and inorganic origin are analyzed. It is shown that previously developed materials mainly allow the development of holographic investigations. Among irreversible materials, considerable progress has been made in improving the characteristics of photopolymerizable recording media, which has allowed their use in color image holography and 3D optical archive-type memory, as well as for fabricating holographic optical elements. In the field of improving the properties of reversible holographic recording media, practically significant results have been obtained for the creation of photoanisotropic materials based on azo dyes experiencing cis–trans photoisomerization, which allow the recording of polarization holograms. The needs of dynamic holography have been satisfied by lightsensitive doped inorganic crystals and polymer layers that have been created with nonlinear optical properties. 相似文献
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Arkhipov R. M. Arkhipov M. V. Pakhomov A. V. Obraztsov P. A. Rosanov N. N. 《JETP Letters》2023,117(1):8-23
JETP Letters - In recent years, progress has been made in obtaining extremely short electromagnetic pulses up to single-cycle and unipolar half-cycle pulses. For pulses with such a dependence of... 相似文献
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M. A. Kazaryan N. P. Korotkov S. E. Skipetrov S. D. Zakharov 《Journal of Russian Laser Research》1998,19(2):186-189
Backscattering of high-power laser pulses in a randomly inhomogeneous media containing microparticles suspended in a liquid is treated theoretically. Relationships for the temporal correlation function of multiply scattered radiation, which account for acceleration of particles in the field of optical radiation, sure derived for the first time. A new method for determination of particle velocities based on correlation properties of scattered light is proposed. 相似文献
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G. G. Fedoruk 《Journal of Applied Spectroscopy》2002,69(2):161-182
The application of transient nutations in EPR spectroscopy of condensed media is considered. The main methods of formation and observation of transient nutations are presented. The laws governing this phenomenon in twolevel and multilevel spin systems and also in inhomogeneous broadening of EPR lines are described. Recent advances in the use of transient nutations to separate overlapping spectra, identify quantum numbers and quantum transitions, investigate the kinetics of photoinduced paramagnetic centers, and determine relaxation times for a wide range of crystalline and disordered media are presented. 相似文献
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We introduce a general framework for studying the localization of classical waves in inhomogeneous media, which encompasses acoustic waves with position dependent compressibility and mass density, elastic waves with position dependent Lamé moduli and mass density, and electromagnetic waves with position dependent magnetic permeability and dielectric constant. We also allow for anisotropy. We develop mathematical methods to study wave localization in inhomogeneous media. We show localization for local perturbations (defects) of media with a spectral gap, and study midgap eigenmodes. 相似文献
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G. V. Golubkov G. Yu. Grigoriev Sh. Sh. Nabiev L. A. Palkina M. G. Golubkov 《Russian Journal of Physical Chemistry B, Focus on Physics》2018,12(5):804-829
The main stages of the nuclear fuel cycle from extraction of uranium ores to disposal of radioactive waste resulting from the processing of spent nuclear fuel were briefly analyzed. A list of the most probable radioactive substances and toxic chemicals that can be part of emergency emissions at each stage of the nuclear fuel cycle was composed. The basic physical principles of local and remote IR absorption laser technologies for detecting radioactive substances and toxic chemicals in the atmosphere for solving some unique problems of environmental monitoring were considered. The analytical potential of the currently most effective laser technologies for atmospheric monitoring at nuclear fuel cycle plants based on the achievements of diode laser spectroscopy, cavity ringdown laser spectroscopy, and optoacoustic laser spectroscopy using diode and quantum-cascade lasers was discussed. Current trends in the development of laser technologies for atmospheric monitoring in different IR spectral ranges were analyzed. 相似文献
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Hong-chen FU 《理论物理通讯》1990,14(4):509-514
An inhomogeneous q-differential realization (q-IHDR) and its corresponding inhomogeneous q-boson realization (q-IHBR) of quantum group SU(n)q are studied. By making use of the q-IHBR a kind of infinite dimensional indecomposable and irreducible representations of SU(n)q is studied on the q-Fcck space. The finite dimensional irreducible representations of SU(n), are obtained on the finite dimensional subspaces of q-Fock space. As an example, these representations of SU(2)q are studied in detail and Jimbo standard irreducible representations are obtained. 相似文献
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The generators and irreducible representation coherent state of the multimodeSU(2) group are constructed by using the inverse operators of the multimode bosonic harmonic oscillator, and the inhomogeneous
inverse differential realization of the multimodeSU(2) group are derived. 相似文献
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JETP Letters - Biphoton fields obtained in spontaneous parametric down-conversion are among the main tools of modern quantum optics. Temporal correlations between photons in the pair play a key... 相似文献
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A Supercoherent State and a New Inhomogeneous Differential Realization of the SPL(2,1) Superalgebra 总被引:1,自引:0,他引:1
The supercoherent state of the SPL(2,1) superalgebra is constructed and its properties are discussed in detail. The new inhomogeneous differential realizations of the SPL(2,1) superalgebra are obtained. 相似文献
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Shaoping Yang Juanjuan Liu Yiming Zhou 《Journal of Macromolecular Science: Physics》2016,55(7):722-731
Hydrogels based on cellulose-graft-poly (acrylic acid) copolymers (C-g-AA) were synthesized by graft copolymerization in a phosphoric acid solvent. Fourier transform infrared (FT-IR) spectra confirmed the structure of the C-g-AA. The adsorption behaviors of the hydrogels for Cu(II) and Ni(II) were investigated. The results showed that their adsorption capacity increased as the initial concentrations of metal ions and the pH value of the solution increased. Freundlich and Langmuir isotherm models were employed to analyze the data from batch adsorption experiments. The results indicated that there were very good correlation coefficients for their linearized equations. The maximum adsorption amounts of the hydrogels for the metal ions, based on the Langmuir model, were 182 and 200 mg/g for Cu(II) and Ni(II), respectively. When the initial concentration of metal ions was 1000 mg/g the actual adsorption amounts of the hydrogels for Cu(II) and Ni(II) were 181 and 183 mg/g, respectively. 相似文献
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Possible magnetic states of a cubic ferromagnet with a uniaxial anisotropy induced along the [210] direction are theoretically investigated. It is demonstrated that the orientation phase diagram of a magnet is nontrivial and admits the existence of three types of magnetic phases that differ in transformational properties and the presence of quintuple points, isostructural phase transitions, etc. It is found that magnetic inhomogeneities, regardless of the values of parameters of the matter, have a common structure: they correspond to 180-degree domain boundaries with a noncircular trajectory of the magnetization vector. The features of homogeneous and inhomogeneous magnetic states, found in these materials, make it possible to explain the manifestation of a flexomagnetoelectric effect in them. 相似文献
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Yong-Qing Chen 《International Journal of Theoretical Physics》2002,41(9):1795-1802
The simple coherent state of the OSP(2,1) superalgebra is constructed and its properties are discussed in detail. The matrix elements of the OSP(2,1) generators in the coherent state space are calculated. The new form for inhomogeneous differential realization of the OSP(2,1) superalgebra is given. 相似文献