Materials Literature
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Abstract Boron nitride (BN) nanotubes were obtained in high yield via chemical vapor deposition by annealing Fe3BO6 under NH3 atmosphere at 1100 °C. The XRD and FTIR spectra indicate the products are high pure hexagonal phase BN. SEM, TEM, and HRTEM were used for observing the morphology of the products. The possible…
Abstract A simple and versatile method to evaluate the interactions between four different phthalocyanine dyes and carbon nanotube surfaces using silica spheres coated with ultrathin-layers of single-walled carbon nanotubes (SWNTs) is described. The well-isolated SWNTs immobilized on the silica spheres acted as effect…
Abstract We found that the post treatment of Nb2O5–WOx fibers with an aqueous solution of oxalic acid resulted in the formation of nanosheet oxides with a layer-by-layer structure in which bundles of fibers were assembled. The oxalic acid-treated catalyst showed much better recyclability in Friedel–Crafts alkylation a…
International audience
Abstract A mononuclear peracetatoiron(III) complex [Fe(6Me2-BPP)(CH3C(O)O2)]+ (2) with a tripodal ligand (6Me2-BPP) was prepared in the reaction of an iron(II) complex [Fe(6Me2-BPP)(H2O)]+ (1) with peracetic acid. 2 is the first example of a structurally and spectroscopically well-defined non-heme type peracetatoiron(…
Methylmalonate-semialdehyde dehydrogenase (MSDH) belongs to the CoA-dependent aldehyde dehydrogenase subfamily. It catalyzes the NAD-dependent oxidation of methylmalonate semialdehyde (MMSA) to propionyl-CoA via the acylation and deacylation steps. MSDH is the only member of the aldehyde dehydrogenase superfamily that…
An efficient transformation of the sulfur atoms to the sulfonyl group in a range of thienopyrroles was achieved by using the HOF·CH(3)CN complex. Mild conditions, high yields, and easy purification are the main features of this novel route. Most new materials exhibit considerable red-shift absorptions in the UV/visibl…
BACKGROUND: Polyethyleneimine (PEI), which can interact with negatively charged DNA through electrostatic interaction to form nanocomplexes, has been widely attempted to use as a gene delivery system. However, PEI has some defects that are not fit for keeping on gene expression. Therefore, some modifications against P…
Abstract The Sn–W mixed oxide prepared by calcination of the Sn–W mixed hydroxide precursor with Sn/W molar ratio of 2:1 at 800 °C (Sn–W oxide) acts as an efficient heterogeneous catalyst for the synthesis of 5-hydroxymethylfurfural (HMF) and furfural from various hexoses (including polysaccharides) and pentoses, resp…
Integrin α(V)β(3) plays a critical role in tumor angiogenesis and metastasis. Suitably radiolabeled cyclic RGD peptides can be used for noninvasive imaging of α(V)β(3) expression. The aim of this research was to prepare a multimeric system of technetium-99m-labeled gold nanoparticles conjugated to c[RGDfK(C)] and to e…
The organ- or tissue-printing approach, based on layered deposition of cell-laden hydrogels, is a new technique in regenerative medicine suitable to investigate whether mimicking the anatomical organization of cells, matrix, and bioactive molecules is necessary for obtaining or improving functional engineered tissues.…
Abstract Single crystals of a novel solid-solution compound BaMoxTi1−xO3 (x ≈ 0.175) in a BaTiO3 and BaMoO3 system were successfully grown by flux in Ar at 1423 K using the BaCO3–B2O3 system flux. The obtained crystals were black and rectangular with a maximum dimension of 0.2 × 0.2 × 0.3 mm3. The EDX and EPMA analyse…
We consider nuclear spin dynamics in a two-electron double dot system near the intersection of the electron spin singlet $S$ and the lower energy component $T_{+}$ of the spin triplet. The electron spin interacts with nuclear spins and is influenced by the spin-orbit coupling. Our approach is based on a quantum descri…
We suggest simple model of image formation in atomic force microscope (AFM) taking into account contact deformations of probe and sample during scanning. The model explains the possibility of AFM visualization of regular atomic or molecular structure when probe-sample contact area is greater than an area per atom or m…
The expanded biological and medical applications of nanomaterials place a premium on better understanding of the chemical and physical determinants of in vivo particles. Nanotechnology allows us to design a vast array of molecules with distinct chemical and biological characteristics, each with a specific size, charge…
Inspired by the simplicity and versatility of layer-by-layer (LbL) assembly, we applied multilayered polyelectrolyte assemblies on nanoparticles to create viable systemic delivery systems. Focusing on tumor-specific delivery, LbL nanoparticles that exhibit a pH-sensitive outer stealth layer are demonstrated to target…
Cette thèse s'inscrit dans le projet optique digital porté par la société Essilor, leader mondial dans le domaine de l'optique ophtalmique. La collaboration entre le laboratoire Charles Coulomb et Essilor a donné naissance à une nouvelle génération de systèmes optiques apposés directement sur le verre ophtalmique. Ce…
The power electronic modules are essential components for the electric and hybrid vehicles. These electronic modules are generally an assembly of silicon electronic components (transistors and diodes) on copper substrate by soldering. The substrate ensures the mechanical strength and the heat dissipation to obtain a s…
Despite the recent upsurge of theoretical reduced models for vesicle shape dynamics, comparisons with experiments have not been accomplished. We review the implications of some of the recently proposed models for vesicle dynamics, especially the tumbling-trembling domain regions of the phase plane, and show that they…
the onions were the last thing i laid on the dastar khwan the bread in my daughter’s hands dropped at the clamour of voices go! go! you have ten minutes or you will be caught in the crossfire the c...