Results 201 to 210 of about 26,556 (251)
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Magnetically Responsive Calcium Carbonate Microcrystals
ACS Applied Materials & Interfaces, 2009Here we report the fabrication of magnetically responsive calcium carbonate microcrystals produced by coprecipitation of calcium carbonate in the presence of citrate-stabilized iron oxide nanoparticles. We demonstrate that the calcite microcrystals obtained possess superparamagnetic properties due to incorporated magnetite nanoparticles and can be ...
Fakhrullin R. +2 more
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2021
Framboids are constituted by microcrystals with approximately log-normal size-frequency distributions, and 95% of framboidal microcrystals are between 0.1 and 3.1 μm. Nanocrystals are not generally observed in framboids. Packing efficiencies vary between close-packings in which the microcrystals occupy up to 74% of the framboid volume and random ...
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Framboids are constituted by microcrystals with approximately log-normal size-frequency distributions, and 95% of framboidal microcrystals are between 0.1 and 3.1 μm. Nanocrystals are not generally observed in framboids. Packing efficiencies vary between close-packings in which the microcrystals occupy up to 74% of the framboid volume and random ...
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Microcrystals of a Modified Fibrinogen
Nature, 1972Fibrinogen forms microcrystals after cleavage with an enzyme from Pseudomonas. Electron microscope images reveal a close relation between these structures and fibrin. The results support the view that no major intramolecular rearrangement occurs in the fibrinogen-fibrin conversion.
N M, Tooney, C, Cohen
exaly +3 more sources
Orthogonally Bifunctional Fluorescent Zeolite‐L Microcrystals
Advanced Materials, 2008Microcrystals of zeolite L are functionalized with two different fluorescent dyes in a spatially resolved manner. The multiple functionalities and the selective derivatization of the channel entrances and of the coat of the zeolites result in interesting photophysical behavior as well as potential uses.
Gion Anton Calzaferri, Luisa De Cola
exaly +2 more sources
2021
Framboid microcrystals grow through surface reaction of S2(-II) or H2S with =FeS moieties at defect sites on the pyrite crystal surface. The surface energies of pyrite vary from the most stable cubic through octahedral to pyritohedral and dodecahedral surfaces.
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Framboid microcrystals grow through surface reaction of S2(-II) or H2S with =FeS moieties at defect sites on the pyrite crystal surface. The surface energies of pyrite vary from the most stable cubic through octahedral to pyritohedral and dodecahedral surfaces.
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Supramolecular chirality in peptide microcrystals
Chemical Communications, 2015VCD reveals supramolecular chirality in microcrystals of two peptide segments from human islet amyloid (IAPP, amylin). Previously such supramolecular chirality has been observed by VCD only for amyloid fibrils.
Dmitry, Kurouski +4 more
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Journal of Superhard Materials, 2020
Rare forms of diamond growth and dissolution are described using the example of diamond microcrystals from the Samotkan’ Neogene titanium–zirconium placer on the Ukrainian Shield. These include diamond crystals with complex faceting, microblock crystals, skeletal crystals, vertex-shaped crystals, crystals with natural dissolution, and ideal twins.
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Rare forms of diamond growth and dissolution are described using the example of diamond microcrystals from the Samotkan’ Neogene titanium–zirconium placer on the Ukrainian Shield. These include diamond crystals with complex faceting, microblock crystals, skeletal crystals, vertex-shaped crystals, crystals with natural dissolution, and ideal twins.
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Raman scattering from microcrystals
Phase Transitions, 1990Abstract This review discusses the size effects on Raman scattering from microcrystals. For ionic microcrystals, the existence of surface phonon modes is predicted from electromagnetic theories. It is shown that Raman spectroscopy is very effective to detect the surface phonon modes.
S. Hayashi, K. Yamamoto
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Fine structure of polysaccharide microcrystals
Planta, 1969Negative staining showed the presence of microcrystals in various polysaccharides. Cellulose microcrystals from Valoniopsis, Vaucheria, and an unidentified tunicate had widths of 20, 27, and 30 Å, respectively. Mannan microcrystals from Acetabularia were 10x25 Å and were oriented in linear arrays with their long axis perpendicular to the array axis ...
B C, Parker, G F, Leeper
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Luminescence polarization of CdSe microcrystals
Physical Review B, 1992We have considered theoretically the polarization of the luminescence of small CdSe microcrystals due to the hexagonal structure of the lattice. We derive the energy spectrum and wave functions of holes in spherical microcrystals. It is shown that the value of the splitting between the A and B hole states in microcrystals could be five times smaller ...
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