Materials Literature
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Abstract Ge‐filled carbon nanotubes (CNTs) with an average diameter of 15–100 nm, and Ge‐filled carbon microtubes (CMTs) with an average diameter of 100‐8000 nm, with diamondlike structures have been prepared by metal‐organic (MO)CVD from organogermanium precursors [(C 2 H 5 ) 4 Ge and (n‐C 4 H 9 ) 4 Ge]. These new co…
Liquidus temperatures (TL) were measured for the following float glass-type composition region (in mass%): 72?7 to 74?0 SiO2, 13?1 to 14?2 Na2O, 7?95 to 8?95 CaO, 2?97 to 3?97 MgO, 0?10 to 0?45 Al2O3, and 0?03 to 0?10 K2O. Glasses also contained constant minor fractions of Fe2O3 (0?71) and TiO2 (0?01). Fractions of si…
Films of polypropylene (PP) were grafted with glycidil methacrylate (GMA) using supercritical CO2 as swelling agent and solvent. Different pressures and temperatures were used to study their effects on the soaking and grafting process. FTIR results showed signals at 1726 and 1640 cm-1, assigned to C=O and C=C (after t…
The compound of single-component filled polypropylene (PP) (consists of either talc or CaCO 3 ) and multicomponent filled PP (talc/CaCO 3 /PP) are prepared by melt mixing using Brabender Plasticorder internal mixer. All systems exhibit good stability and normal flow in the molten state. The multicomponent filled PP ha…
Stable crystalline Lead Selenide nanoparticles (PbSe NPs) were prepared with a cubic (sphalerite) phase in polyvinyl alcohol (PVA) matrix. Moreover, XRD was used to characterize the PbSe NPs in PVA. The size were controlled by Pb:Se ions ratio in which the particle size was found to be inversely proportional to this r…
Thin-film barium strontium titanate (BST) capacitors were fabricated and applied to a power amplifier (PA). The PA using these capacitors in output matching network for PCS band was realized and the tunability of its output impedance was validated. The measured adjacent channel leakage power ratio (ACPR1) is -48.6dBc…
Com a finalidade de verificar a viabilidade do tijolo de terra crua (adobe) na execução de moradias, realizou-se pesquisa para identificar as características físicas e mecânicas do solo e definição de procedimentos e métodos de produção do mesmo, estabelecendo critérios que melhorem a qualidade do produto final. O sol…
This work presents the fabrication and characteristics of Bi₂O₃/Si heterojunction prepared by rapid thermal oxidation technique without any postdeposition annealing condition. The bismuth trioxide film was deposited onto monocrystalline Si and glass substrates by rapid thermal oxidation of bismuth film with aid of hal…
The temperature-dependent noise of individual, single-walled carbon nanotubes is measured here in a variety of different gases and liquids. The ambient environment is found to have only a weak relationship with device noise, even in cases where adsorption significantly changes the dc resistance. Correspondingly, a 450…
Small-angle X-ray scattering (SAXS) and dynamic light scattering (DLS) measurements were accomplished on sodium glycodeoxycholate (NaGDC) aqueous electrolyte solutions as a function of NaGDC and NaCl concentrations with the aim to determine with satisfactory approximation the NaGDC micellar aggregate structure at a gr…
Abstract Summary: To explore the potential of a star‐shaped 8‐armed poly(ethylene glycol)35K‐ block ‐poly( L ‐lactide)37K (8‐armed PEG35K‐ b ‐PLLA37K: $\overline M _{\rm n}$ of PEG = 35 000, $\overline M _{\rm n}$ of PLLA = 37 000) film as a novel bioabsorbable adhesion‐prevention membrane, the water structure, surfac…
An air microplasma jet (air µ-PJ) was generated at the tip of a stainless steel surgical needle with outer diameters of 0.4–0.7 mm at air flow rates of 0.3–1.0 l/min and RF (13.56 MHz) powers of 4–14 W, in which the air µ-PJ was operated without generating arc discharge at atmospheric pressure. The needle acts as both…
This document proposes a statistical classification model using k-means cluster analysis to classify partial discharge (PD) patterns into four categories listed as corona at high voltage side in air, corona at low voltage side in air, surface in air, and internal discharge. The independent variables in this k-means cl…
This paper deals with the analysis of the effect of temperature gradient applied to polymeric cables on space charge accumulation inside insulation bulk. In particular, experimental measurements on HVDC cable models showed that space charge due to temperature gradient is generally negligible with respect to excess cha…
We have investigated the axial buckling of multiwall nanotubes under the axial compression using nanomanipulation experiments and molecular dynamics (MD) simulations. Experimentally, Young's moduli of nanotubes with different inner hollow diameters for the same outer diameters are consistent with the Eulers buckling m…
The present study reports on the detailed toxicological and chemotherapeutic evaluation of antituberculosis drug loaded nanoparticles in mice. A single oral dose administration of poly(lactide-co-glycolide) (PLG, a synthetic polymer) nanoparticles containing rifampicin+isoniazid+pyrazinamide+ethambutol could maintain…
Due to the large amount of electrical equipment and the costs of an individual diagnosis in medium-voltage networks, a general consideration of some representative electrical components is necessary to assess the actual condition of the electrical equipment. For a life model of electrical components, the individual ag…
we proved that localized interaction model (LIM) for shield-impactor interaction implies independence of the ballistic limit velocity (BLV) of spaced shield on air gaps and their widths for conical striker.In this study, the effect of deviation from a conical shape on ballistic properties of spaced shield is investiga…
LiF based thermoluminescent materials are the most used passive detectors in the field of radiation protection. For personal and area dosimetry in mixed neutron and photon fields, /sup 6/LiF and /sup 7/LiF TLD pairs are employed for the simultaneous determination of neutron and photon doses. Therefore, an accurate kno…