Materials Literature
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Cordierite is a ternary oxide of silica, magnesia and alumina and one of the interesting ceramic materials and a potential material for various thermo-structural applications. The present study is to explore the possibility of enhancing the mechanical properties of cordierite using zirconia as an additive in the range…
The sol-gel method has been employed for the fabrication high quality mesostructured hybrid films. The effect of the nature of the matrix on the absorption and fluorescence spectra was found. It was shown that the aggregation of the dye molecules is significantly weaker in the SiO2-P123/Rh6G based hybrid films. In cas…
A previous study of available diatom sequences tested the value of multiple outgroups in analyses of the 18S ribosomal RNA gene aimed at recovering the three diatom Classes (Coscinodiscophyceae, Mediophyceae, Bacillariophyceae) as monophyletic groups. Of the 34 datasets tested in that study, three recovered these Clas…
Following controlled photodeprotection of a 2-nitrophenylpropyloxycarbonyl-protected (aminopropyl)triethoxysilane (NPPOC-APTES) film and subsequent derivatization with a bromoester-based initiator, poly(2-(methacryloyloxy)ethylphosphorylcholine) (PMPC) brushes with various grafting densities were grown from planar sil…
Hemidiscus cuneiformis, type of the family Hemidiscaceae, is a diatom with a distinctive semi-circular shape in valve view. A strain of H. cuneiformis was established from the coastal region of the tropical southwestern Atlantic Ocean off Brazil. Cells of this strain showed semi-circular to asymmetrically elliptical v…
Multiferroic materials are presently intensively investigated as potential candidates for a new generation of solar cells. We propose an approach to the photovoltaic effect that takes directly into account the crystal and light beam wave symmetries. it is based on an expansion in Wigner spherical functions and it allo…
Two new species of Gomphonema with linear-lanceolate valves, narrow cells (width ≤6 µm), wide axial areas, short uniseriate striae, and one stigmoid per valve are described. Gomphonema caperatum sp. nov. has narrow, almost linear valves with short marginal striae, apically elongated slit-like areolae, and transapicall…
Axial crystals have axial symmetry which keeps invariant straight line with a fixed point. Axial symmetry groups include 27 non-cubic crystallographic point groups and 5 limit groups describing symmetry of textures and liquid crystals. We show that, except for four cases, each axial symmetry belongs to one of five axi…
In this study, Schiff base was synthesized from the condensation reaction of 3,5-diaminobenzoic acid, 4,4 $$^\prime $$ -diaminobenzanilide, vanillin with 4-hydroxybenzaldehyde. Then, Schiff bases polymers were synthesized via oxidative polycondensation method in the presence of catalyst (polymer–metal complex) in orga…
Considering the results of an experiment carried out at the scientific lab of the National Library of France, it is clear that the nanocellulose film combined with a 5%-Klucel G® in ethanol can be ...
Tiaozi 条子, or reinforcing strips, are traditionally used to protect and support the cracked or torn areas often seen in rolled Chinese hanging scrolls. They are usually adhered to the verso after a first new lining has been applied or as a repair to the burnished back of a scroll. However, this traditional method can…
A series of trivalent rare-earth element ions (europium, terbium, dysprosium) singly- and co-doped strontium yttrium borate phosphors was synthesized via the sol–gel method. The phase formation, luminescence properties, decay times, and energy transfer behaviors from terbium ions to europium ions, the thermal stabilit…
Abstract Molecular dynamics simulations of edge dislocation interactions with coherent and incoherent silver precipitates in the copper matrix are applied to investigate precipitation strengthening. Simulated shear tests with spherical and octahedral precipitates revealed that dislocations can cut a precipitate or cir…
In recent times, carbon dots have emerged as new fluorescent probes. The unique electronic and physical properties of carbon dots find significant applications in different fields like sensing, cell-imaging, catalysis, medicine etc. The intriguing fluorescence, cytocompatibility and nontoxicity of carbon dots are cons…
Abstract Herein we report for the first time the use of dynamic covalent reactions (DCRs) for building a π‐stacking model system and further quantifying its substituent effects (SEs), which remain a topic of debate despite the rich history of stacking. A general DCR between 10‐methylacridinium ion and primary amines w…
Due to the axisymmetric nature of many engineering problems, bi-dimensional axisymmetric finite elements play an important role in the numerical analysis of structures, as well as advanced technology micro/nano-components and devices (nano-tubes, nano-wires, micro-/nano-pillars, micro-electrodes). In this paper, a str…
An initial inventory of diatom biodiversity at 12 sites draining into Lake Ichkeul, northern Tunisia, was performed in summer 2014, together with the characterisation of metal pollution status by analysing trace metal concentrations to determine Water Quality Indices. The maximum values of Fe, Mn, Sb, Zn, Cu and Pb we…
In this study, Sr2MgSi2O7:Eu2+,Dy3+ long-afterglow luminescent materials have been successfully prepared via sol-hydrothermal method. The sample shows good crystallinity and optical properties. The sintering time and sintering temperature have great impacts on the crystallization process and luminescence properties. F…
[Ba(Nd0.1Ti0.8Nb0.1)O3](1-y)[Na0.5Bi0.5TiO3]y ceramics were prepared through solid state sintering (CS) and microwave sintering (MWS) route. The XRD results indicate that the ceramic samples have a cubic structure at room temperature. The dielectric, electromechanical and piezoelectric properties were also investigate…
γ-aluminium oxynitride (AlON) has an excellent thermal and chemical stability, which makes AlON an attractive candidate for a wide range of applications. Production of transparent AlON is extremely challenging because residual porosity must be reduced to an absolute minimum. This can be achieved by spark plasma sinter…