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Morphological, structural and optical properties of MoO2 films electrodeposited on SnO2∣glass plate

100%
Dukstiene N., Sinkeviciute D., Guobiene A.
Open Chemistry
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2012
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vol. 10
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issue 4
1106-1118
EN
MoO2 films were prepared by electrodeposition under potential controlled conditions from an aqueous alkaline solution of sodium molybdate. Optical microscopy showed that films of different morphology were deposited. The surface roughness and grain size were determined by atomic force microscopy. The characterization of as-deposited films by X-ray diffraction analysis revealed their amorphous nature. The optical constants of films were derived from transmittance spectra recorded in the 310–1100 nm wavelength range. All films were highly absorptive and showed a direct band to band transition. From the absorption edge data, the values of the optical band gap E g and the Urbach energy E U were determined based on Tauc’s model. The influence of film thickness on the extinction coefficient k, refractive index n, absorption coefficient a and the band gap energy E g was studied. [...]
2
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New approaches in layer by layer synthesis of collagen/hydroxyapatite composite materials

100%
Ilie A., Andronescu E., Ficai D., Voicu G., Ficai M., Maganu M., Ficai A.
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EN
The aim of this work was to increase our understanding of collagen (COLL)/ hydroxyapatite (HA) composite materials; more specifically, we focused on the study of the influence of the precursorconcentrations over the final content of deposited HA. We found that the increase of the precursor concentrations led to better mineralization (on the basis of the content of deposited mineral phase). Regardless of the precursor concentrations, the content of the deposited amount was found to increase with the increase of the number of deposited layers. Quantification of the mineral phase amount was achieved by gravimetric determination. Based on the determined deposition equation the number of layers can be easily determined in order to obtain composite materials with desired content of mineral phase.
3
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Three Dimensional Morphology of β-Al5FeSi Intermetallics in AlSi Alloys

86%
Mikołajczak P., Ratke L.
Archives of Foundry Engineering
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2015
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issue 1
4
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Control of Nd-Fe-B Morphology as Function of the PVP Concentration Using Electrospinning Process

86%
Eom N. S. A., Haq M. A., Lee J., Lim K.-M., Kim T. S., Choa Y.-H., Kim B. S., Eom N. S. A., Haq M. A., Lee J., Lim K.-M., Kim T. S., Choa Y.-H., Kim B. S.
Archives of Metallurgy and Materials
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2020
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vol. 65
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issue 3
5
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Effective melatonin protection of burn-induced hepatic disorders in rats

72%
Bekyarova G., Bratchkova Y., Tancheva S., Hristova M.
Open Medicine
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2012
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vol. 7
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issue 4
533-538
EN
We studied the effect of melatonin on morphological and functional disorders using serum markers of liver dysfunction such as cholinesterase and gamma glutamyl transpeptidase, hepatic protein content and malondialdehyde in a burned-rat model. Melatonin (10 mg/kg (−1), i.p) was administered immediately and then 12 h after 30% of total body surface area burns of male Wistar rats. The burns induced an increase of hepatic malondialdehyde levels by 166% (p<0.001), and also vascular congestion, leukocyte infiltration around the central veins, intracellular vacuolization, hepatic cell degeneration and apoptotic bodies (Councilman’s bodies). These changes were associated with significantly reduced serum cholinesterase (36%), gamma glutamyl transpeptidase (76%), hepatic proteins (52%) and serum albumin (37%) (p<0.001–0.0001). Treatment with melatonin reduced elevated hepatic malondialdehyde values by 50% (p<0.01). Melatonin restricted degenerative alteration in the hepatocytes: it protected the burninduced decrease of serum gamma glutamyl transpeptidase activity by 48% (p<0.01), hepatic proteins by 64% (p<0.01), and serum activity of cholinesterase as the only marker of liver damaged synthetic function by 57% (p<0.0001) but did not exert any significant influence on serum albumin concentration. Melatonin repaired the pathomorphological lesions and functional disorders. It could restore liver damage following thermal injury in humans.
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