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。
Manganese tetraphenylporphyrin supported on nano- TiO 2 has been synthesized and structurally characterized. It has been shown to have excellent catalytic activity for the aerobic oxidation of α-pinene. Experimental results showed that this much-enhanced activity could arise from possible co-catalysis between metallop…
Abstract The immobilization of trypsin onto various commercial silica gels was studied. Silica gels were used directly and characterized by mercuric porosimetry. Agitation rates (100–740 rpm) and particles size (35–75 to 250–500 μm) of silica gels did not affect the trypsin immobilization capacity. The pore size (3 to…
Ignitor is a nuclear fusion experiment aimed at studying Deuterium-Tritium plasmas. If European proposed waste management strategies were applied, all Ignitor radioactive materials could be recycled or declassified to non-radioactive material. We have applied the Italian waste management regulations to the IGNITOR exp…
In this paper we describe the optical emission spectroscopy studies of a plasma enhanced chemical vapor deposition of nanostructured carbon films. The nano-carbon films were deposited from a hydrogen-methane gas mixture activated by a direct current discharge. The gas discharge plasma parameters providing a stable syn…
Natural biomaterials are complex composites in hierarchical structure and multifunction. They have some special structures and functions because of their evolution through the exchanges of energy, matter and information with their surroundings over millions of years. The cuticle represents 25% of the dry weight of the…
The working life of electrical machines is primary affected by the insulation system quality. Diagnostics methods help to understand the momentary state of insulation and to avoid the possible damage or electrical breakdown of machines through the repair or insulation rewinding. Partial discharges testing belongs to o…
Zinc oxide based metal oxide varistors (MOV) are widely used electrical surge protection components. The design of modern high power, high-density electronic systems necessitate the need for smaller footprint, higher current density and higher nonlinearity MOVs. Such requirements can no longer be satisfied by commerci…
Multi-functionalised micro/nanostructures of conducting polymers in neat or blended forms have received much attention because of their unique properties and technological applications in electrical, magnetic and biomedical devices. Biopolymer-based conducting fibrous mats are of special interest for tissue engineerin…
A classification is given for the classical allotropes of carbon in the context of atom hybridization and for nanocarbon, taking into account the molecularity, size, and shape of particles (fullerenes, nanotubes, nanoonions, and nanodiamonds). The structural features of different kinds of nanocarbons and their chemica…
Exchangeable Al has been used as a criterion for the calculation of lime requirement in several Brazilian States. However, the laboratory method with extraction by a 1 mol L-1 KCl solution followed by indirect alkaline titration is not accurate for some Brazilian soils, mainly in the case of soils with high organic ma…
Breast cancer is currently the most commonly diagnosed cancer in the UK. There are approximately 45,000 new cases each year, with one in nine women developing breast cancer at some point in their l...
The differential thermal analysis (DTA) is utilized to determine the phase boundary and phase equilibria of Co–Cu alloy having a miscibility gap. Regions for various phase i.e., spinodal and coherent binodal, peritectic, magnetic and the transformation from the two phases to α phase transformations are distinctly dete…
In this study, we use a freeze casting technique to construct ceramic-polymer composites in which the 2 phases are arranged in an electrically parallel configuration. By doing so, the composites exhibit dielectric constant (K) up to 2 orders of magnitude higher than that of composites with ceramic particles randomly d…
El mal manejo de los humedales de altura está conduciendo a un deterioro acelerado de estos ambientes dinámicos y frágiles. El objetivo de este trabajo es estudiar la abundancia, la biomasa y la diversidad de algunos componentes del fitoplancton de humedales altoandinos de la provincia de Jujuy, en relación a variable…
Transient space charge within polyethylene has been simulated based on a bipolar charge transport model with a constant mobility. Initial results are in good agreement with those previously reported. To further develop the model, two types of field-dependent carrier mobility: power-law mobility and Poole-Frenkel mobil…
The crystal structure of tschermakite from Fiskenaesset, Greenland, (K 0.05 Na 0.38 ) ∑0.43 (Ca 1.80 Na 0.05 Fe 2+ 0.15 ) ∑2.00 (Mg 3.65 Fe 2+ 0.18 Mn 0.03 Fe 3+ 0.09 Al 0.81 Cr 0.19 Ti 0.05 ) ∑5.00 (Si 6.43 Al 1.57 ) ∑8.00 O 22 [(OH) 1.95 F 0.04 Cl 0.01 ] ∑2.00 , a 9.8059(5), b 17.9721(8), c 5.3012(2) A, β 105.063(1)…
The internal reflection in gold nanocluster films in the Kretschmann geometry is studied using polarization modulation of electromagnetic radiation. The reflection coefficients R s and R p for s- and p-polarized light, respectively, as well as their difference ΔR = R s − R p , are measured as functions of the angle of…
The advantages of new simple-shear methods of severe plastic deformation (equal-channel multiple angular extrusion, T-type extrusion, and twist extrusion) are examined for polyamides from the viewpoint of the structural modification of flexible-chain semicrystalline polymers. The effect of the deformation scheme and m…
The magneto-optical properties of perforated metal-dielectric heterostructures that consist of a metal film perforated with a periodic system of slits and a dielectric layer magnetized in the plane have been investigated. The numerical simulation based on the rigorous coupled-wave analysis has revealed that, in these…
Transparent conductive Al-doped ZnO (AZO) thin films are prepared on normal glass substrates by the sol-gel spin coating method. The effects of drying conditions, annealing temperature and cooling rate on the structural, electrical and optical properties of AZO films are investigated by x-ray diffraction, scanning ele…