Materials Literature
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The ASME Section III design-by-analysis approach provides stress criteria for the design of nuclear components. Stresses are calculated elastically for the most part, although plastic analysis is recognized. Limits are specified for primary, secondary, and peak stresses. Inherent in these limits are factors of safety…
The effect of electron conditioning on commercially available aluminium alloys 1100 and 6063 was investigated. Contrary to the assumption that electron conditioning, if performed long enough, can reduce and stabilize the secondary electron yield (SEY) to low values (⩽1.3, the value for many pure elements), the SEY of…
The single-chain magnet (SCM) system $[{\mathrm{Mn}}_{2}{(\text{saltmen})}_{2}\mathrm{Ni}{(\mathrm{pao})}_{2}{(\mathrm{L})}_{2}]{(\mathrm{A})}_{2}$ (L: intrachain attaching ligand of ${\mathrm{Ni}}^{II}$ ion; ${\mathrm{A}}^{\ensuremath{-}1}$: interchain counteranion) is a ferromagnetic one-dimensional network system w…
Nanoparticle synthesisWhile not sufficiently comprehensive or cohesive to be used as a reference work, a book on gas phase nanoparticle synthesis provides useful information for those working in the field, says C. Suryanarayana.Nanostructured materials are now receiving much attention from scientists across many disci…
Abstract The mannose binding proteins on the surface of the dendritic cells are responsible for capture of pathogens in the early stages of immune response. Conjugation to mannose dendrimers is a rarely explored but potentially powerful strategy for enhancing immunogenicity of synthetic peptides relying on direct deli…
Highly sensitive K 2 Ca 2 (SO 4 ) 3 : Eu thermoluminescence detector phosphor was irradiated at room temperature by 7 Li ion beams at 24 and 48 MeV for different ion fluences in the range 10 9 –10 12 ions/cm 2 using a 16 MV Tandem Van de Graff Type Electrostatic Pelletron Accelerator at the Nuclear Science Centre, New…
A structural investigation of the compound 8-OPIMB-NO2 is carried out. This material is a mesogen formed by bent-core molecules where the so-called B7 phase was originally proposed. X-ray data are successfully indexed in terms of a oblique two-dimensional lattice. Using additional information from optical second harmo…
<div class="htmlview paragraph">In the past few years, considerable efforts have been directed towards the further development of Urea-SCR(selective catalytic reduction) technique for diesel-driven vehicle. Although urea possesses considerable advantages over Ammonia(NH<sub>3</sub>) in terms of toxic…
Below 3 nm, nanodiamonds were experimentally verified to be more stable than graphite. Experimental and theoretical studies reveal that the nanometer-sized curvature of nanodiamonds is the physical origin of their stability. A similar nanosize effect was reported for the shrinkage of nanocavities on ion-beam irradiati…
We report here a low-temperature approach which is simple and catalyst free to synthesize aligned ZnO nanorods on flat substrates, i.e. decomposing zinc acetate (C 4 H 6 O 4 Zn) in air at ∼250 °C. The ZnO nanorods prepared by this method exhibited strong photoluminescence at ∼377 nm, ∼387 nm and ∼401 nm. Thermal annea…
A wide range glass system based on the TeO2–WO3–ZnF2 was prepared. A number of physical properties, namely, the glass transition temperature, optical energy gap, Urbach energy, optical basicity, ultrasonic velocity (longitudinal and shear), elastic moduli, Poisson's ratio and Debye temperature were investigated by usi…
<div class="htmlview paragraph">The selective catalytic reduction of NO using urea (urea-SCR) is one of the promising technologies for removing NO<sub>x</sub> from diesel engine exhaust. The engine-out NO<sub>x</sub> is reduced by ammonia (NH<sub>3</sub>) derived from urea ove…
We studied the programming dynamics in phase change memory cells. It is shown that programming in stand-alone cells is strongly affected by the parasitic capacitance in the measurement setup, leading to a current overshoot after threshold switching of the amorphous chalcogenide. This results in a parasitic melting and…
This paper gives a short review of two different methods for life prediction at high temperature; namely continuum damage mechanics (CDM) and the linear life-fraction rule (LFR). It is well known that the class of CDM theories with a separable evolution law gives a life prediction in accordance with the LFR. However,…
The valence-band electronic structure of alkanethiol stabilized gold nanoparticles (NPs) with different core sizes has been studied using x-ray photoemission spectroscopy. A reduction of density of state near the Fermi level is observed for small particles $(<3\phantom{\rule{0.3em}{0ex}}\mathrm{nm}\phantom{\rule{0.…
Performance analysis of three-phase induction motors under supply voltage unbalance conditions is normally carried out using the well-known symmetrical components analysis. In this analysis, the voltage unbalance level at the terminals of machine is assessed by means of the NEMA or IEC definitions. Both definitions le…
An extended surface impedance boundary condition algorithm is developed that allows for the optical properties of a wide variety of complex one-dimensional periodic grating structures to be modeled. Wood-Rayleigh anomalies, diffraction, and electromagnetic resonance modes including horizontally oriented surface plasmo…
A theoretical model is suggested that describes emission of partial Shockley dislocations from triple junctions of grain boundaries (GBs) in deformed nanocrystalline materials. In the framework of the model, triple junctions accumulate dislocations due to GB sliding along adjacent GBs. The dislocation accumulation at…
Experimental batch and miscible-flow cultures were studied in order to determine the mechanistic pathways of microbial Fe(III) respiration in ferruginous smectite clay, NAu-1. The primary purpose was to resolve if alteration of smectite and release of Fe precedes microbial respiration. Alteration of NAu-1, represented…
Carbon nanotubes have generated considerable excitement in the scientific and engineering communities because of their exceptional mechanical and physical properties observed at the nanoscale. Carbon nanotubes possess exceptionally high stiffness and strength combined with high electrical and thermal conductivities. T…