Materials Literature
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Transforming growth factor-beta1 is a fibrogenic cytokine that is important in the development of fibroproliferative disorders of the skin after injury. To investigate the role of transforming growth factor-beta1 produced by keratinocytes during wound healing, a plasmid with the human transforming growth factor-beta1…
Methyltrioxorhenium(VII) (MTO) has been immobilized in the mesoporous silica MCM-41 functionalized with pendant bipyridyl (bpy) groups of the type 4-[(−O)3Si(CH2)4]-4′-CH3-2,2′-bipyridine. Powder X-ray diffraction and N2 adsorption-desorption studies confirm that the regular hexagonal symmetry of the host is retained…
Detector-grade undoped chemical vapor deposited (CVD) diamond samples have been studied with thermally stimulated currents (TSC) and photoinduced current transient spectroscopy (PICTS) analyses in the temperature range 300–650 K. Two previously unknown defects have been identified, characterized by activation energies…
To approach a microscopic understanding of the reaction kinetics on complex surfaces of heterogeneous catalysts, we combine multimolecular beam techniques and a supported model catalyst approach. The model systems are prepared under ultrahigh vacuum (UHV) conditions and have been characterized in detail with respect t…
The complex {Fe[HC(3,5-Me2pz)3]2}I2 (1) has been prepared from the reaction of FeI2 and HC(3,5-Me2pz)3 (pz = pyrazolyl ring) in a 1:2 ratio. The complex is high-spin in both the solid state and in solution at ambient temperature. In the solid state, magnetic susceptibility and Mössbauer spectral studies indicate that…
Abstract Hybrid composites consisting of isotactic poly(propylene) (PP), sisal fiber (SF), and maleic anhydride grafted styrene‐(ethylene‐ co ‐butylene)‐styrene copolymer (MA‐SEBS) were prepared by melt compounding, followed by injection molding. The melt‐compounding torque behavior, thermal properties, morphology, cr…
Porous silicon is a material of intense technological and fundamental interest, due to its high surface area, quantum confinement effects, light emission, and complex nanoscale architecture. There is a strong desire to be able to control the surface properties of this versatile material at will through functionalizati…
We previously reported on the successful creation of tissue-engineered valve leaflets and the implantation of these autologous tissue leaflets in the pulmonary valve position. Mixed cell populations of endothelial cells and fibroblasts were isolated from explanted ovine arteries. Endothelial cells were selectively lab…
We study the grating-assisted light-emitting diode, an LED design for high brightness based on a resonant cavity containing one- or two-dimensionally periodically corrugated layers (grating). We give in detail a generally applicable electromagnetic analysis based on the rigorous coupled-wave theory to calculate the ex…
Sodium niobate powders were prepared by the amorphous complex method using a water-soluble Nb−malic acid complex and sodium carbonate. Niobium oxide pentahydrate was dissolved in hot oxalic acid solution, followed by the addition of NH 3 (30%) until pH = 11, precipitating niobic acid that was added into a solution of…
Inorganic nanotubes of WS2 have been investigated by high-resolution transmission electron microscopy, and scanning tunneling microscopy, providing support for the theoretical prediction of correlation of bandgap with diameter.
Alfalfa ( Medicago sativa L.) is primarily used as a source of forage and animal feed. Improving the economic value of alfalfa could be achieved by developing new uses of this perennial crop. To investigate the potential of alfalfa as a source of industrial materials, we employed a genetic transformation approach to p…
Effect of Focal Plane Array Cold Shield Aperture Size on Fourier Transform Infrared Micro-Imaging Spectrometer Performance
Poly(styrene sulfonate) and poly(allylamine hydrochloride) layers have been adsorbed supplementarily on polyelectrolyte capsules. The permeability of the original capsules consisting of four layer pairs was of the order of 10–5 m/s for fluorescein. They were also permeable for macromolecules. Polyelectrolyte layers ad…
Although both RAG-1 and RAG-2 are required for all steps of V(D)J recombination, little is known about the specific contribution of either protein to these steps. RAG-1 contains three acidic active-site amino acids that are thought to coordinate catalytic metal ions. To search for additional catalytic amino acids and…
In a given batch more than 30%–40% of polycrystalline, MgO‐doped Al 2 O 3 tubes were converted into single crystals of sapphire by abnormal grain growth (AGG) in the solid state at 1880°C. Most crystals grew 4–10‐cm in length in tubes with wall thicknesses of 1/2 and 3/4 mm and outer diameters of 5 and 7 mm, respectiv…
Ab initio, molecular orbital calculations were carried out to study the energetic stability and NMR characteristics of “triclusters” of composition [T(XO)(OH) 2 ]O[Al(OH) 3 ][T(OH) 3 ] (X = no atom, H + , Li + , Na + , K + , Mg 2+ , or Ca 2+ ; T = Si 4+ or Al 3+ ). These triclusters consist of a central oxygen atom in…
The excess carbon of various polysilazane precursors with varying carbon contents was investigated using 13 C MAS NMR, Raman and ESR spectroscopies, and microwave conductivity measurements. Microstructure characterization was investigated using TEM. The collected data were compared with those from a previous study on…
Author: Kraft, O. et al.; Genre: Journal Article; Issued: 2002-05; Keywords: MPI für Intelligente Systeme; Ehemalige Abt. Arzt; 14-ar_2002; fatigue; thin films; size effect; Title: Fatigue behavior of polycrystalline thin copper films
Abstract The miscibility evolution of polycarbonate/polystyrene (PC/PS) blends during the compounding process in three blending methods of industrial relevance, namely melt blending, remelt blending in a twin‐screw extruder and third melt blending in an injection molding machine, was investigated by measuring their gl…