Materials Literature
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The ability of Azotobacter chroococcum strain 7B, producer of polyhydroxybutyrate (PHB), to synthesize its copolymer poly-3-hydroxybutyrate-3-hydroxyvalerate (PHB-HV) was studied. It was demonstrated, for the first time, that A. chroococcum strain 7B was able to synthesize PHB-HV with various molar rates of HV in the…
Abstract We have developed an over 60‐inch size Moth‐eye anti‐reflection surface, which has original shaped nanostructures. The minimum reflectance was 0.02% and the average was less than 0.04% with little wavelength dependence. Moreover an anti‐glare function was added. The 60‐inch LCD applied AG Moth‐eye surface had…
It has been well established that a fine tuning in cobalt ferrite nanocrystal size within the single domain region would lead to the achievement of extremely high coercivity values at room-temperature. If so, the high coercivity and chemical stability expected for this ferrite will increase its attractiveness for magn…
This work focuses on the effect of film thickness on the microstructural and magnetic properties of polycrystalline Fe80Ga20 films of different thickness (20 nm≤t≤200 nm) fabricated on Si⟨100⟩ substrates. From x-ray diffraction, a ⟨110⟩ texture was normal to the film plane in all films. For all film thicknesses, the l…
The complex permittivity and permeability of La0.7Sr0.3MnO3 (LSMO)-epoxy composite absorbers are investigated in the microwave ranges from 2 to 18 GHz by transmission/reflection method. A negative magnetic susceptibility of perovskite oxides has been obtained in the frequency range of 4–18 GHz. By the use of the cavit…
Nanocrystalline Pr0.7Sr0.3MnO3 sample has been prepared by sol-gel method. The room temperature powder x-ray diffraction data show single phase nature of the sample and confirm the cubic crystal structure with Fm3¯m space group. The average crystallite size is calculated using Scherrer formula, and it is found to be ∼…
Two-dimensional (2D) discrete dislocation plasticity simulations are carried out to investigate the Bauschinger effect (BE) in freestanding thin films. The BE in plastic flow of polycrystalline materials is generally understood to be caused by inhomogeneous deformation during loading, leading to residual stress upon u…
A well known superdisintegrant like croscarmellose sodium or crospovidone loses their quick disintegration property when compressed at more than 4 kg tablet crushing strength (TCS). Therefore, the objective of the present work was to develop a disintegrating system that could be used for preparing fast disintegrating…
Abstract The rate of delayed hydride cracking (DHC) has been measured in Zircaloy-4 fuel cladding in several metallurgical conditions using the pin-loading tension technique. In light water reactor (LWR) cladding in the cold-worked and cold-worked and stress-relieved conditions, the cracking rate followed Arrhenius be…
Experimental studies and molecular dynamics modeling demonstrate that multivalent dendrons can be used to temporarily glue proteins and DNA together with high affinity. We describe N-maleimide-cored polyamine dendrons that can be conjugated with free cysteine residues on protein surfaces through 1,4-conjugate addition…
We investigate the steady state heat current in two and three dimensional isotopically disordered harmonic lattices. Using localization theory as well as kinetic theory we estimate the system size dependence of the current. These estimates are compared with numerical results obtained using an exact formula for the cur…
The impact of cation distribution on electronic structure and magnetic properties is investigated by the first-principle calculation. The structure optimization is based on generalized gradient approximation (GGA) exchange-correlation and projector augmented wave method. The optimized structures of inverse and normal…
Benthic epilithic diatom assemblages were studied along with physico-chemical variables from 27 spring habitats situated in the western margin mountain area of the Eastern Alps (Vorarlberg, Austria) and were collected between the years 2003–2005. The sampling sites are situated in five of the seven aquatic ecoregions,…
Bioassay-guided fractionation of a MeOH extract of tubers of Coleus tuberosus afforded the active anti-tumor-promoting compounds identified as the triterpenoid 2alpha,3beta-dihydroxyolean-12-en-28-oic acid (maslinic acid; CT2) and a phytosterol mixture (CT1). CT1 consists of stigmasterol (32%), beta-sitosterol (40.3%)…
The hard tissue of the Japanese pearl oyster, Pinctada fucata, consists of two layers, the outer prismatic layer, bearing calcite, and the inner nacreous layer, bearing aragonite. An EDTA-insoluble fraction of the prismatic layer of P. fucata was extracted with urea. In-vitro crystallization experiments showed that th…
In this work, the results of synthesis of core-shell NiFe2O4 nanoparticles and influence of silica coating on the magnetic properties of nanoparticles are presented. Spherical NiFe2O4 nanoparticles were prepared via a normal micelles process. NiFe2O4 nanoparticles homogeneously coated with SiO2 of various shell thickn…
The effect of temperature variation on the magnetoelastic properties of the CoAlxFe2−xO4 system (for x=0.0, 0.2, 05, and 0.7) has been studied. Substitution of Al3+ for Fe3+ was found to lower the Curie temperature of the samples and to change the lattice parameter. The magnitude of peak to peak magnetostriction, stra…
In this work, EPDM rubber crumbs from used tyres have been treated in batch and continuous processes in order to produce a regenerated material. For this purpose, the effect of EPDM particle size, oil type, and concentration as well as processing time, temperature, and mixing intensity were controlled for treatment in…
Carbon nanotubes are highly versatile materials; new applications using them are continuously being developed. Special attention is being dedicated to the possible use of multiwalled carbon nanotubes in biomaterials contacting with bone. However, carbon nanotubes are also controversial in regards to effects exerted on…
This work presents the modern approach to the detection of various types of defects in composite structures used in aerospace. In such structures, including glass reinforced plastics and carbon reinforced plastics, different failure modes could occur at a manufacturing stage and during service life. Defects are connec…