Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
Gold nanoparticles are potentially very attractive components for therapeutic delivery since they can be synthesized with any diameter from 1 to 200 nm to carry a payload of therapeutic molecules into a cell without triggering an immune response. Gold nanoparticles must undergo surface transformations before coupling…
Pertinent physical properties of experimental particleboard specimens produced from date palm (Phoenix dactylifera-L) branch mid-ribs chips impregnated with ureaformaldehyde (UF) polymer binder are investigated. The effect of process variables (press temperature, pressure, press cycle time and particle thickness) on t…
Over the last decade, protein purification has become more efficient and standardized through the introduction of affinity tags. The choice and position of the tag, however, can directly influence the process of protein crystallization. Octopine dehydrogenase (OcDH) without a His tag and tagged protein constructs such…
Single-walled carbon nanotubes (SWCNTs) are noncovalently functionalised with octaethylporphyrins (OEPs) and the resulting nanohybrids are isolated from the free OEPs. Electron paramagnetic resonance (EPR) spectroscopy of cobalt(II)OEP, adsorbed on the nanotube walls by pi-pi-stacking, demonstrates that the CNTs act a…
NiO nanoparticles have been prepared in a room temperature ionic liquid, 1-butyl-3-methylimidazolium tetrafluoroborate (bmimBF4). The morphology and microstructures of the NiO nanoparticles were investigated by transmission electron microscopy (TEM) and x-ray diffraction (XRD). The TEM micrographs indicated that the n…
Substrate-free ZnO thin films have been obtained by metal organic chemical vapor deposition. Mild heating (37−51 °C) of the Zn(C 5 F 6 HO 2 ) 2 ·2H 2 O·CH 3 (OCH 2 CH 2 ) n OCH 3 ( n = 2, 3, 4) adduct precursors produced thermally stable liquid compounds that were easily evaporated. Rapid quenching to room temperature…
The first synthesis of a chelating and reactive surfactant derived from citric acid and a short silicone as hydrophobic tail is described. Aqueous solutions of this reactive amphiphile spontaneously induce gold ion reduction, particle nucleation, and further direct crystal growth. The process, both pH and light depend…
A simple three-state lattice model that incorporates two states for locally ordered and disordered forms of liquid water in addition to empty cells is introduced. The model is isomorphic to the Blume-Emery-Griffith model. The locally ordered (O) and disordered (D) forms of water are treated as two components, and we a…
Abstract Natural cellulose molecules have a strong tendency of being aggregated into larger structures. Thus, the imaging of isolated individual cellulose molecules is hampered for a long time. In this work, we manage to observe, for the first time, the isolated individual natural cellulose chains on a sample surface…
Ceramic/metal interfaces were studied that fail by atomistic separation accompanied by plastic dissipation in the metal. The macroscopic toughness of the specific Ni alloy/Al2O3 interface considered is typically on the order of ten times the atomistic work of separation in mode I and even higher if combinations of mod…
Patterned ZnO deposition on substrates has received increasing attention because of its great potential in photocatalysis, energy conversion, and electro-optical techniques. Chemical solution growth is especially promising for organic substrates due to its very mild reaction conditions. Here this method is used on fun…
We propose an efficient numerical scheme, based on the method of lines, for solving the Landau-de Gennes equations describing the relaxational dynamics of nematic liquid crystals. Our method is computationally easy to implement, balancing requirements of efficiency and accuracy. We benchmark our method through the stu…
We use group theory to classify the superconducting states of systems with two orbitals on a tetragonal lattice. The orbital part of the superconducting gap function can be either symmetric or antisymmetric. For the orbital symmetric state, the parity is even for spin singlet and odd for spin triplet; for the orbital…
Y-TZP presents excellent properties at room temperature but these properties decrease as the temperature increases. This paper studies the behavior 20vol%Si3N4-SiC when added in YTZP matrix and heated under no pressure system. Al2O3 and Y2O3 were used to maintain the stability of the matrix and as sintering aids. The…
Polycrystalline SiC-diamond composites have been fabricated by high pressure and high temperature, HPHT, sintering using a Si infiltration method. However, infiltration of liquid silicon around the diamond particles results not only in SiC but also in free silicon, which causes deterioration of the composite propertie…
The 716-amino-acid guanidino kinase from the parasitic flatworm Schistosoma mansoni results from the fusion of two guanidino kinase subunits. Crystals of this 80 kDa protein have been obtained in the monoclinic space group P2(1), with unit-cell parameters a = 52.7, b = 122.1, c = 63.2 A, beta = 108.5 degrees . Synchro…
Polypropylene (PP) copolymer reinforced with talc, CaCO 3 , or multicomponent fillers (a combination of talc and CaCO 3 ) were compounded in a Brabender Plasti-Corder ® internal mixer. These compounds then experienced an extrusion process by means of a capillary rheometer. The rheological and morphological (SEM) prope…
The setting reaction of magnesium phosphate cements starts with water addition to a mixture of ammonium phosphate and magnesium oxide, is very fast and takes place at room temperature (cold setting). Literature shows that controversy is still going on about the reaction mechanism, hence, about the effect on the settin…
Abstract The missing member of the heteroadamantane series, 1‐oxoniaadamantane ( 4a ), was prepared by the ionization of suitable bicyclic precursors under strongly acidic conditions. The ion 4a was characterized by 1 H and 13 C NMR spectroscopy. The X‐ray crystal structure of ion 4a was also obtained with a CB 11 H 6…
The syntheses of new blue luminescent N(2)-modified guanosine derivatives with chromophores p-4,4'-biphenyl-NPh2 (1a), p-4,4'-biphenyl-N(2-py)2 (1b), and p-4,4'-biphenyl-2-(2'-pyridyl)benzimidazolyl (1c), respectively, have been achieved. These new N(2)-guanosines are moderate blue emitters with lambda(max) = 395 nm (…