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Sivu 1 alkaen 243 tuloksia
Myelin phagocytosis in Wallerian degeneration of peripheral nerves depends on silica-sensitive, bg/bg-negative and Fc-positive monocytes.
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Previous experiments with nerves enclosed in millipore diffusion chambers had shown that myelin degradation during Wallerian degeneration depends on invasion by non-resident cells. The present study was aimed at a more precise identification of the invading cell population. Monoclonal antibody
Nonresident macrophages in peripheral nerve of rat: effect of silica on migration, myelin phagocytosis, and apolipoprotein E expression during Wallerian degeneration.
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The selective toxicity of silica quartz dust to macrophages was used to assess the role of these cells in Wallerian degeneration and nerve repair. Left sciatic nerves of adult Wistar rats were crushed and one group of animals received repetitive intraperitoneal injections of silica (200 mg two times
Efficient and broadband Stokes wave generation by degenerate four-wave mixing at the mid-infrared wavelength in a silica photonic crystal fiber.
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Based on degenerate four-wave mixing (FWM), the broadband Stokes waves are efficiently generated at the mid-infrared wavelength above 2 μm, for the first time to our knowledge, by coupling the femtosecond pulses into the fundamental mode of a silica photonic crystal fiber designed and fabricated in
Effect of macrophage suppression with silica on the proliferation of Schwann cells during Wallerian degeneration.
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Effects of macrophage suppression on Schwann cell proliferation in Wallerian degeneration was investigated in vitro with thymidine autoradiography. Sciatic nerves of C57BL mice were transected shortly after an intraperitoneal injection of silica dust and Schwann cells were harvested at 1, 2, 3, 5,
[Study on surface treatment of silica filler. Hydrolytic deterioration of the silane coupling layer].
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The mechanism of the hydrolytic deterioration of the silane coupling agent layer on silica filler of composite resin was examined. As a result of the desorption of the absorbed silane molecules, the contact angle between water drop and the silica plate treated with the silane coupling agent
Degenerate four-wave mixing in a silica hollow bottle-like microresonator.
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A hollow, bottle-like microresonator (BLMR) was fabricated from a microcapillary with a nearly parabolic profile. From simulations at 1.55 μm the fundamental bottle mode is shown to be in the anomalous dispersion regime, while the conventional whispering gallery mode, confined to the center of the
Deleterious role of trace elements - Silica and lead in the development of chronic kidney disease.
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Chronic-Kidney-Disease of Unknown-etiology (CKDu) has been reported in developing-countries like Sri-Lanka, India and Central-America without sparing the Indian sub-district (namely Canacona) located in south-Goa. The disease etiology is unlinked to common causes of diabetes and hypertension and
Degenerate crystals from colloidal dimers under confinement.
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Colloidal aperiodic phases (i.e., entropy stabilized degenerate crystals, DCs) are realized via self-assembly of hollow fluorescent silica dimers under wedge-cell confinement. The dimer building blocks approximate two tangent spheres and their arrangements are studied via laser scanning confocal
Blue-emitting small silica particles incorporating ZnSe-based nanocrystals prepared by reverse micelle method.
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ZnSe-based nanocrystals (ca. 4-5 nm in diameter) emitting in blue region (ca. 445 nm) were incorporated in spherical small silica particles (20-40 nm in diameter) by a reverse micelle method. During the preparation, alkaline solution was used to deposit the hydrolyzed alkoxide on the surface of
Chemically Robust Anti-Fog Nanocoating Through Multilayer Deposition of Silica Composite Nanofilms
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A coating must remain intact to perform its inherent functions on a surface, and often functional organic coatings fail due to deterioration because of their intrinsic vulnerabilities. In this work, we present a biomimetic material based on a glass sponge to provide a robust silica composite
Effect of Dextrin on the Adsorption Behavior and Surface Characteristics of Sub-Bituminous Coal and Silica.
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Dextrin is a derivative of starch produced by partial thermal degradation under acidic conditions, which is usually used as a depressant in the mineral processing industry. Dextrin can also effectively depress coal particles in the reverse flotation process. To study the effect of dextrin on the
All-optical control of ultrahigh-Q silica microcavities with iron oxide nanoparticles.
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We propose and experimentally demonstrate, to the best of our knowledge, the first all-optical control scheme of ultrahigh-quality (Q)-factor silica microcavities, which can maintain their Q factors over 108 during the tuning process. For silica microcavities, the resonance tunability is very
Improving Powder Magnetic Core Properties via Application of Thin, Insulating Silica-Nanosheet Layers on Iron Powder Particles.
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A thin, insulating layer with high electrical resistivity is vital to achieving high performance of powder magnetic cores. Using layer-by-layer deposition of silica nanosheets or colloidal silica over insulating layers composed of strontium phosphate and boron oxide, we succeeded in fabricating
Degenerate four-wave mixing for measurement of magnetic field using a nanoparticles-doped highly nonlinear photonic crystal fiber.
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A novel magnetic field sensor based on the degenerate four-wave mixing (DFWM) technique is theoretically proposed using a As2S3-core silica-cladding photonic crystal fiber (PCF). In order to enhance the sensitivity, we put forth a novel design of highly nonlinear PCF where the
Deep-ultraviolet second-harmonic generation by combined degenerate four-wave mixing and surface nonlinearity polarization in photonic crystal fiber.
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Deep-ultraviolet (UV) second-harmonics (SHs) have important applications in basic physics and applied sciences. However, it still remains challenging to generate deep-UV SHs especially in optical fibers. Here, for the first time, we experimentally demonstrate the deep-UV SH generations (SHGs) by
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