Materials Literature
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This paper contains a review of basic research and new concepts in flax and hemp fibre processing for flax and hemp cotton-like and wool-like yarns spun by different spinning systems. The review covers the trends and economical conditions since the beginning of the 20th century. We present the advantages and disadvant…
It has been acknowledged that ultrasonic impact treatment (UIT) occupies a firm position among methods for improving the reliability of welded joints, particularly their fatigue strengths. Developed in Russia in the early 1970s, this process has aroused considerable interest among experts and researchers in the area o…
The preparation of SBA-15 type plugged mesoporous silica using an inexpensive silica source in a two-step process is described. The resulting material was used as a catalyst support for a hydrodechlorination (HDC) reaction. The structure and morphology of the mesoporous silica and catalysts were determined using trasm…
The redox active ligand EDT-TTF-CONH-3-pyridine undergoes a [2 + 2] cycloaddition upon irradiation with polychromatic light, an unprecedented single-crystal-to-single-crystal transformation for a TTF derivative.
Magnetic Barkhausen noise measurements have been carried out to characterize Ferrite-Martensite steels. Using thermal treatments, the volume fraction and the carbon content of martensite were varied in reasonable proportions. The results indicate that the Barkhausen noise measurements can easily allows us to distingui…
The reaction of a series of phosphanyl-terminated carbosilane dendrimers displaying only one phosphorus ligand per arm with [RuCl(2)(p-cymene)](2) resulted in the grafting of RuCl(p-cymene) moieties on the periphery of the dendrimer. In these species, the chloride ligand is easily displaced by the organic bases pyridi…
Nearly monodispersed tin/tin oxide core/shell nanoparticles were prepared by a reverse microemulsion technique. A phenanthroline–tin chloride complex was used in an optimized microemulsion system to obtain small particle size and good size control (mean = 3.2 nm, standard deviation = 0.5 nm). Preparation in the absenc…
Freestanding anodic aluminum oxide (AAO) membranes were fabricated using a two-step anodization procedure, voltage reduction method, and inductively coupled plasma polymerization. The fabrication process was monitored with electrochemical and spectroscopic ellipsometry measurements, X-ray photoelectron spectroscopy, F…
Abstract Hartree–Fock (HF) and density functional (DFT) LCAO calculations of single (2D) and periodical (3D) slab models of MgO crystal are presented. HF and DFT methods produce very close results for the surface energy and electrostatic potential and exhibit the same convergence properties, with the slab thickness in…
We propose a new method for the kinetic treatment of self-discharge of intercalation electrodes based on a combination of cyclic voltammetry (CV) and chronopotentiometry under net zero current conditions. This was applied to composite graphite electrodes in 1 M dimethyl polycarbonate at four different temperatures fro…
In the present work, reactions occurring between molten iron containing varying amounts of oxygen and mullite substrate were investigated through optical Sessile drop experiments. The reactions were followed in static as well as dynamic modes through contact angle measurements. Further, the reactions were followed as…
The thermal fatigue (TF) behavior of a new type high-Cr cast hot work die steel was investigated. The results indicate that TF cracks initiate at the grain boundaries or at the interface between inclusion and matrix, which had been oxidized, and then propagated along the grain boundaries. The thermal fatigue crack ini…
Luminescent nanocrystalline (NC) Ce3+-doped yttrium aluminum garnet (Y3Al5O12:Ce–YAG:Ce) is prepared by a combustion synthesis technique that yields a highly porous three-dimensional network of interconnected 18 nm nanocrystals. Tetramethyl rhodamine isothiocyanate (TRITC) was conjugated to NC YAG:Ce by using glycine…
Despite the fact that the influence of metal chemistry on metal uptake in marine phytoplankton has been well studied, the effects of physiological processes such as cellular growth remain less well known. In this study, the cell-specific growth rate of the coastal diatom Thalassiosira pseudonana (Clone-3H) was modifie…
The melting behavior of isothermally crystallized it‐1‐butene/ethylene copolymers with different ethylene content has been investigated by differential scanning calorimetry (DSC) and simultaneous small‐ and wide‐angle x‐ray diffraction (SAXS/WAXS) using synchrotron radiation. A very important influence of the aging ti…
Water molecules are interspersed within ribbons of face-sharing [PbI6/2−]∞ octahedra within the title hybrid phase in which the stacks of organic radical cations are less strongly dimerised and interact more with each other than is usually the case in β′ phases to achieve metallic conductivity at ambient pressure.
Two new mixed-metal sandwich complexes [M(II)2(H2O)2Fe(III)2(P2W15O56)2]14- (abbreviated [M2Fe2P4W30], M(II) = Co(II), Mn(II)) were obtained at pH 3 by addition of M2+ to [Na2(H2O)2Fe(III)2(P2W15O56)2]16- (abbreviated [Na2Fe2P4W30]) without substitution in the alpha-[P2W15O56]12- (abbreviated [P2W15]) units. Their X-r…
A magnetically coupled Cu(II)36 aggregate forms around a potassium chloride unit.
In order to achieve the required low reactor mass per unit electrical power for space reactors, refractory alloys are essential due to their high operating temperature capability that in turn enables high thermal conversion efficiencies. One of the key issues associated with refractory alloys is their performance in a…
The short-term responses of articular cartilage to mechanical injury have important implications for prevention and treatment of degenerative disease. Cell and matrix responses were monitored for 11 days following injurious compression of cartilage in osteochondral explants. Injury was applied as a single ramp compres…