Materials Literature
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This study aimed to develop a practical three-dimensional (3D) macroporous scaffold from aligned electrospun nanofibrous yarns for bone tissue engineering. A novel 3D unwoven macroporous nanofibrous (MNF) scaffold was manufactured with electrospun poly(L-lactic acid) and polycaprolactone (w/w 9:1) nanofibers through s…
Ultrahigh-molecular-weight poly[(R)-3-hydroxybutyrate] [UHMW-P(3HB)] synthesized by genetically engineered Escherichia coli is an environmentally friendly bioplastic material which can be processed into strong films or fibers. An operon of three genes (organized as phaCAB) encodes the essential proteins for the produc…
Pt-based bimetallic nanoparticles have attracted significant attention as a promising replacement for expensive Pt nanoparticles. In the systematic design of bimetallic nanoparticles, it is important to understand their preferred atomic structures. However, compared with unary systems, alloy nanoparticles present more…
The quantum nature of nuclei plays an important role in the accurate modelling of light atoms such as hydrogen, but it is often neglected in simulations due to the high computational overhead involved. It has recently been shown that zero-point energy effects can be included comparatively cheaply in simulations of har…
Portland cement paste is a multiphase compound mainly consisting of calcium-silicate-hydrate (CSH) gel, calcium hydroxide (CH) crystal, and unhydrated cement core. When cement paste is exposed to high temperature, the dehydration of cement paste leads to not only the decline in strength, but also the increased pore pr…
Objective: To construct tissue-engineered (TE) venous valves in vitro using two types of bone marrow-derived progenitor cells and decellularized scaffold. Methods: Bone marrow-derived multipotent adult progenitor cells (MAPC) and endothelial progenitor cells (EPC) from canines were labeled by Hoechst or PKH26, respect…
The NiZn(Ni0.4Zn0.6Fe2O4) spinel ferrite and Co2Z(Ba3Co2Fe24O41) hexagonal ferrite composite materials with the various Co2Z contents have been synthesized by the solid-state reaction method. The phases and microstructures of the sintered ceramics have been analyzed. The results show that Co2Z grains exist as a second…
Recently, using spark plasma sintering technique, a family of very fine grained, fully dense NiCuZn ferrites have been produced, which show constant permeability up to several 10 MHz. These ferrites can be used for filtering purposes in high frequency applications where a wide frequency band is required. In this paper…
Über Kreuz: BCNU ist ein Chemotherapeutikum, das eine Ethylbrücke zwischen N1 von Desoxyguanin und N3 von Desoxycytidin generiert. Bisher wurde noch über keine Synthese eines solchen DNA-Addukts berichtet. Eine neue Synthese unter Verwendung einer photoaktivierbaren Nucleobase liefert nach Aktivierung ein hoch reaktiv…
1,2-polybutadiene/organic montmorillonite nanocomposites (1,2-PB/OMMT NCs) were prepared by in-situ polymerization of butadiene (Bd) through the coordination polymerization technique. The effect of the type and addition method of OMMT on the structures and properties of the prepared composites were studied. The struct…
Abstract Using a reactive extrusion‐molding process, we produced poly(lactic acid) (PLA) nanocomposites from L ‐lactide monomer in the presence of organic montmorillonites. On the basis of X‐ray diffraction, scanning electron microscopy, and transmission electron microscopy analyses, we determined that the intercalati…
Polymers in the Pharmaceutical Applications - Natural and Bioactive Initiators and Catalysts in the Synthesis of Biodegradable and Bioresorbable Polyesters and Polycarbonates
Partial discharge (PD) is a common phenomenon that occurs in the insulation of high-voltage equipment, such as transformers, and has a damaging effect on the insulation. If data mining techniques are used to extract special specifications and features for different types of PDs in power transformers or other power equ…
Abstract In this work, nanocomposites of poly (m‐xylene diamide) (MXD6) with dodecaphenyl polyhedral oligomeric silsesquioxane (POSS), montmorillonite (MMT) and their combination (MMT‐POSS) were produced by melt‐compounding and their structure–property relationships were established. The montmorillonite was found to b…
Ceramic–metal composites (cermets) containing 4 mol% yttria-zirconia (4YSZ) and Ni particles as anode materials in solid oxide fuel cells were prepared by two methods. The first method involves nickel oxalate dihydrate precipitation on the 4YSZ powder and decomposition at 360 °C in inert Ar atmosphere. The second meth…
Abstract In this study, the role of polyvinyl alcohol (PVA) in eliminating the inhibition phenomenon of modified light‐weight carbon black (CB) during the synthesis of polystyrene/modified light‐weight carbon black (PS/MLCB) composite particles was examined. It was interesting to note that the polymerization time was…
The influence of high-k dielectric bioceramics with poly(amino acid) multilayer coatings on the adhesion behavior of Escherichia coli (E. coli) was studied by evaluating the density of bacteria coverage on the surfaces of these materials. A biofilm forming K-12 strain (PHL628), a wild-type strain (JM109), and an engin…
We present the photovoltaic properties of heterojunctions made from single-walled carbon nanotube (SWNT) fibers and n-type silicon wafers. The use of the opaque SWNT fiber allows photo-generated holes to transport along the axis direction of the fiber. The heterojunction solar cells show conversion efficiencies of up…
Abstract Rubber nanocomposites based on hot styrene‐butadiene rubber (SBR) and organophilic layered silicate were prepared via mechanical mixing followed by compression molding. Varying amount of organically modified nanosilicate, 2.5, 5, 10, and 15 parts per hundred of rubber (phr), was added to the SBR matrix to exa…
Abstract A novel, effective approach to improve the cutting and chipping resistance (CCR) of carbon black (CB)‐filled styrene butadiene rubber (SBR) composite was reported in this study. CCR of SBR was dramatically improved more than 30% by addition of 4 phr nanodispersed clay (NC), while not decreasing the stress at…