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1
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Microstructure of brushite crystals prepared via high internal phase emulsion

100%
Lim H., Kassim A., Huang N., Chia C.
Open Chemistry
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2010
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vol. 8
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issue 1
202-206
EN
For the first time, various microstructures of calcium phosphates were successfully synthesized using a high internal phase emulsion process. The crystals were possessed in the brushite crystalline phase. The morphology of the crystals was influenced by the variables related to the emulsion process route, which consisted of flakes, dendrites and particulates structures. [...]
2
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Mimicking the morphology of long bone

100%
Ficai A., Andronescu E., Ficai D., Sonmez M., Albu M., Voicu G.
Open Chemistry
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2012
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vol. 10
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issue 6
1949-1953
EN
The aim of this work was to mimic the stratified structure of the median region of long bones. Starting from this desideratum, more COLL/HA composite materials with different morphology were synthesized and characterized, each of these materials mimicking one layer of long bone (endo- and periosteum, compact and cancellous bony tissue). Stratified bone grafts were obtained by assembling these layers; the obtained grafts were similar to the median region of long bones. Even though, natural bones have a more complex microstructure, this is a pioneering work since for the first time a stratified COLL/HA composite material similar to bone was produced. [...]
3
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Crystallization of nordstrandite in ethylene glycol / water solutions: electron microscopic studies

100%
Antunes M., Santos H., Santos P.
Open Chemistry
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2009
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vol. 7
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issue 3
461-467
EN
The present work shows the growth of nordstrandite microcrystals observed by transmission and scanning electron microscopy. Nordstrandite was synthesised from non-crystalline aluminium hydroxide reacted in 20% ethylene glycol/water solution, at room temperature. This material was characterized by TEM, SEM, SAED, XRD and EDS/TEM, during six month and revealed the formation and growth of nordstrandite. Fibrillar pseudoboehmite is the only aluminium hydroxide which could be identified during the first two weeks. The nuclei grow, from complete dissolution/recrystallization of pseudoboehmite fibrils, into platy rectangular microscrystals of nordstrandite. Some tabular microcrystals recrystallise, forming after six months only the multi-point nordstrandite stars. This electron-optical study suggest that the star shape results from the overlapping of rectangular plates, and pseudoboehmite fibrils act as the precursor of nordstrandite crystallisation in ethylene glycol/water solution. [...]
4
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The effects of intravitreally injected bevacizumab on the retina and retina pigment epithelium: experimental in-vivo electron microscopic study in intact versus vitrectomized eyes

100%
Kocak N., Ozogul C., Kaynak S., Sonmez U., Zengin M., Karti O., Ozturk T., Ergin M.
Open Medicine
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2010
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vol. 5
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issue 6
745-751
EN
To analyze the retinal toxicity of bevacizumab at various doses both in vitrectomized and non-vitrectomized rabbit models. Twenty- eight rabbits were included in the study. Twenty- four rabbits were assigned to six groups, with 4 of the rabbits in the control group. The animals in Groups 1, 2 and 3 received bevacizumab at a dose of 0.3 mg, 0.5 mg and 1.5 mg /eye, respectively. The rabbits in Groups 4, 5 and 6 received intravitreal bevacizumab of 0.3 mg, 0.5 mg and 1.5mg/eye, respectively, after gas compression vitrectomy. Two weeks after the procedure, the rabbits were euthanized. Retina tissue samples were then obtained and examined with both light and electron microscopes. In Groups 1, 2 and 3 after bevacizumab injection, toxic degeneration in the photoreceptor and retinal pigment epithelium cells was observed via electron microscopic examination. The findings in Groups 4 and 5 were normal as compared to the control group. In Group 6, toxicity in the bipolar neurons and photoreceptor cells was noticed. Increased toxicity and retinal penetration were noticed in all administered doses of bevacizumab in the presence of vitreous. In addition, ocular toxicity occurred through the injection of the highest dose of bevacizumab after vitrectomy. It is possible that the bevacizumab dose and the, vitreous are as important as the drug half-life in the vitreous.
5
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Analysis of airborne metal containing particles with EDX/EDS detectors in electron microscopes

88%
Sielicki P., Janik H., Guzman A., Reynolds A., Namieśnik J.
Open Chemistry
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2011
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vol. 9
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issue 2
308-313
EN
In years 2006–2010 particulate matter analysis was undertaken for dust samples collected from Gdansk and London area in order to compare their morphology and composition. Part of those studies was devoted to analysis of particulate matter (PM) bearing metals. Characterization of the morphology and size of the particles collected onto the filters was performed using a scanning electron microscope (SEM) and transmission electron microscope (TEM). Both electron microscopes were equipped with energy dispersive X-ray spectrometers to identify the elemental composition of the particles. On analysis of the X-ray spectra acquired by both TEM and SEM, the particles were divided into 10 groups as follows: Al-rich, Ba-rich, C-rich, Ca-rich, Cl-rich, Fe-rich, Mg-rich, Na-rich, S-rich, Si-rich. Speciation of the particles based on the major element and accompanying minor elements yielded 34 particle types. However, some pairs of elements repeat, for instance: Na-Cl and Cl-Na, Al-S and S-Al, Si-Al and Al-Si, S-Ca and Ca-S. These are undoubtedly the same types of particles; variation in peak heights of the major and minor elements is normal in a mixed particle population.
6
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The Evolution of Microstructure and Magneto-structural Properties of Heat Treated NI-MN-SN-IN Heusler Alloys Sintered by Vacuum Hot Pressing

88%
Maziarz W., Wojcik A., Chulist R., Szczerba M. J., Kowalczyk M., Czaja P., Cesari E., Dutkiewicz J.
Archives of Metallurgy and Materials
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2019
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vol. 64
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issue 2
7
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Microstructure of Multi-Component NI35TI35TA10CO10CU10 Alloy

88%
Glowka K., Zubko M., Świec P., Prusik K., Dercz G., Matyja E., Stróż D.
Archives of Metallurgy and Materials
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2019
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vol. 64
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issue 2
8
Content available remote

Facile preparation of graphite intercalation compounds in alkali solution

88%
Li J., Shi H., Li N., Li M., Li J.
Open Chemistry
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2010
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vol. 8
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issue 4
783-788
EN
Graphite intercalation compounds are often prepared by flake graphite, oxidants, inorganic acids, organic acids and intercalated ions which are usually hydrogen protons between the graphene planes. They are also known as the acid-treated graphite intercalation compounds. In this work, alkaline graphite intercalation compounds were prepared by flake graphite, K2Cr2O7, concentrated H2SO4 and NaOH, and the morphology and structure were characterized by Electron microscopy and X-ray techniques. The results display that the combination of neutralisation heat and oxidation capability produced by K2Cr2O7 can break the bonds to produce the spaces between the graphene planes and hydroxyl ions also intercalate into the graphene planes to form alkaline graphite intercalation compounds in alkali solution. The morphology and structure of alkaline graphite intercalation compounds are analogous to the ones of the acid-treated graphite intercalation compounds, but the intercalated ions and the expansion volume are different. The results show that the method is an innovation.
9
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Microstructure Analysis of Equiatomic Multi-Component NI20TI20TA20CO20CU20 Alloy

75%
Glowka K., Zubko M., Świec P., Prusik K., Dercz G., Stróż D.
Archives of Metallurgy and Materials
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2019
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vol. 64
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issue 2
10
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Fabrication and characterization of 1-D alumina (Al2O3) nanofibers in an electric field

75%
Azad A.-M., Noibi M., Ramachandran M.
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2007
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vol. 55
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issue 2
11
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EFFECT OF DELTA FERRITE ON THE MECHANICAL PROPERTIES OF DISSIMILAR FERRITIC-AUSTENITIC STAINLESS STEEL WELDS

75%
Ghasemi R., Beidokhti B., Fazel-Najafabadi M.
Archives of Metallurgy and Materials
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2018
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vol. 63
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issue 1
12
Content available remote

Gas-phase synthesis of inorganic fullerene-like structures and inorganic nanotubes

75%
Deepak F., Tenne R.
Open Chemistry
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2008
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vol. 6
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issue 3
373-389
EN
Following the discovery of fullerenes (C60) and carbon nanotubes, it was shown that nanoparticles of inorganic layered compounds, like WS2 and MoS2, are unstable in the planar form and they form closed cage structures with polyhedral or nanotubular shapes. Although initially the method of synthesis for the formation of such closed caged structures and nanotubes involved starting from the respective oxides, it is now well established that the gas-phase synthetic route (using metal chlorides, carbonyls etc) provides an alternative which is suitable for the synthesis of very many closed caged structures and nanotubes hitherto unknown. Various issues with this method of synthesis, including its fundamentals, mechanism, and the properties of the inorganic fullerene-like structures produced are reviewed, together with some possible applications. [...]
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