Materials Literature
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Microviridins are ribosomally synthesized tricyclic depsipeptides produced by different genera of cyanobacteria. The prevalence of the microviridin gene clusters and the natural diversity of microviridin precursor sequences are currently unknown. Screening of laboratory strains and field samples of the bloom-forming f…
We describe herein the features of a novel cultivation system, combining electrical stimulation with medium perfusion for producing thick, functional cardiac patches. A custom-made electrical stimulator was integrated via inserting two carbon rod electrodes into a perfusion bioreactor, housing multiple neonatal Spragu…
This study considers different environmental factors affecting corrosion under marine immersion conditions and proposes a mathematical model incorporating their effects on corrosion degradation through the ship life. The study adopts a nonlinear function of time as the reference corrosion model calibrated with operati…
Abstract The removal of a surface air layer from a superhydrophobic coating in flowing water was evaluated using a laser beam and a high-speed camera. It proceeded via three steps: (1) removal of the top unstable air layer, (2) retention of air in the bottom of the surface microstructure, and (3) replacement of air in…
GlnD is a bifunctional uridylyltransferase/uridylyl-removing enzyme (UTase/UR) and is believed to be the primary sensor of nitrogen status in the cell by sensing the level of glutamine in enteric bacteria. It plays an important role in nitrogen assimilation and metabolism by reversibly regulating the modification of P…
We report the fabrication of heterostructure white light-emitting diode (LED) comprised of n-ZnO nanotubes (NTs) aqueous chemically synthesized on p-GaN substrate. Room temperature electroluminescence (EL) of the LED demonstrates strong broadband white emission spectrum consisting of predominating peak centred at 560…
This study seeks to clarify the influence of grain character on the corrosion rate of Mg. There is a special need to understand the largely unknown corrosion–grain size relationship for Mg, which nominally displays poor corrosion resistance, since any efforts to reduce or control the rate of Mg corrosion are of large…
Formation and growth mechanisms of oxides films on monophased copper-tin bronzes are still in discussion. In this context, the aim of this study is to determine the nature and the localisation of the corrosion products formed on the bronzes surface. So, the bronze electrodes with variable tin content (between 7% and 1…
Co-encadrement de la thèse : Vincent Maurel
For the first time, an additive for conducting polymer membrane has been prepared from an Indian coal. Samla coal from Raniganj coalfield having 80% carbon on dmmf basis was first demineralised chemically and then degraded by oxidizing it with oxidizing agent followed by solubilization of oxy coal thus produced in pol…
Highly dense oriented arrays of nanotubes were synthesized via a chemical vapor infiltration process using anodic alumina membrane as a template. The nanotubes have a unique granular structure, which is composed of SiC nanocrystals embedded in an amorphous matrix. X‐ray diffraction and high‐resolution transmission ele…
A novel hyperbranched poly(aryl ether) containing azobenzene moieties (azo-HPAE) as a side chain has been synthesized and investigated on the temperature dependence of photo-induced birefringence. Typical curves of photo-induced birefringence were obtained at 25, 40, 60, 80, and 100°C. The curves for buildup and decay…
Binary isotactic polypropylene (iPP) composites with talc and wollastonite were modified with different elastomers: poly(styrene-b-butadiene-b-styrene) (SBS), poly(styrene-b-ethylene-co-propylene) (SEP), poly(styrene-b-ethylene-co-butylene-b-styrene) (SEBS), SEBS grafted with maleic anhydride (SEBS-g-MA), ethylene/pro…
A Comment on the Letter by H. B. Cui et al., Phys. Rev. Lett. 102, 237001 (2009). The authors of the Letter offer a Reply.Received 20 October 2009DOI:https://doi.org/10.1103/PhysRevLett.104.139701©2010 American Physical Society
In recent years, increasing attention has been directed to the use of renewable resources, particularly of sugarcane bagasse. Considering the abundant availability of such lignocellulosic materials, relatively few attempts have been made regarding their utilization. Studies about properties and morphology, heavy metal…
The extractability and slow reactions of copper (Cu) and zinc (Zn) in a weathered savanna soil under Brachiaria decumbens, Digitaria smutsii, and Stylosanthes guianensis pastures were determined in a laboratory incubation study using a sequential extraction to remove operationally defined fractions of the metals, cons…
Bipolar fatigue of ferroelectric lead zirconate titanate ceramics can be partly recovered by thermal annealing. For samples of initially, intermediately, or highly fatigued state, subsequent refatiguing yields a much more rapid decay in polarization and piezoelectric constant than the initially nonfatigued samples des…
On the principle of phase-shift mask, the metal segment of a sub-wavelength Ag grating on a quartz substrate is used as a phase-shifting layer in this photolithography method. When the radiation modes of the surface plasmon polaritons (SPPs) excited on the Ag surface have optical phase opposite to that of the waves em…
The CsCl-type antiferromagnetic compound NdMg presents below ${T}_{N}=61\text{ }\text{K}$ a second spontaneous transition at 35 K, associated with an antiferroquadrupolar (AFQ) ordering of the $⟨{P}_{xy}⟩$ quadrupolar component. The AFQ ordering induces a new charge periodicity that is detected by the onset of satelli…
We study the edge states in graphene in the presence of a magnetic field perpendicular to the plane of the lattice. Most of the work done so far discusses the edge states in either zigzag or armchair edge graphene considering an isotropic electron hopping. In practice, graphene can have a mixture of armchair and zigza…