Materials Literature
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The aim of this study was to assess structural and biochemical differences in the extracellular matrix of the fetal and adult porcine mitral heart valves in relation to their mechanical characteristics. Using tensile tests it was demonstrated that the material properties of porcine mitral heart valves progressively ch…
OBJECTIVES: Since blood flow impairment by aortic valve prosthesis is characteristically dynamic, this dynamic component is best and thoroughly appreciated by exercise Doppler echocardiography. We sought to determine the haemodynamics of a new pericardial aortic bioprosthesis [Trifecta™-aortic valve bioprosthesis (T-A…
Crystalline silicon solar cells based on all-laser-transferred contacts (ALTC) have been fabricated with both front and rear metallization achieved through laser induced forward transferring. Both the front and rear contacts were laser-transferred from a glass slide coated with a metal layer to the silicon substrate a…
Polymers consisting of azocalix[4]arenes in the main chain and tetraethylene glycol monomethyl ether chains in the lower rim of the calix[4]arene units have been prepared. The polymers undergo reversible photoisomerization between the trans and the cis forms, the extent of which depends on the solvent. A lower critica…
Stimuli-responsive polymer nanoparticles are playing an increasingly more important role in drug delivery applications. However, limited knowledge has been accumulated about processes which use stimuli-responsive polymer nanospheres (matrix nanoparticles whose entire mass is solid) to carry and deliver hydrophobic the…
Abstract The synthesis and characterization of mononuclear [Cu(L)2(Cl)2] (1), dinuclear [{CuCl(L)}2(μ‐Cl)2] (2), and another mononuclear complex [Cu(L)2(ClO4)2] (3) with a bidentate N,N‐diisopropylpicolinamide ligand (abbreviated L) are described. Complexes 1 and 2 were obtained from the same reaction mixture and show…
Generating propulsion with small-scale devices is a major challenge due to both the domination of viscous forces at low Reynolds numbers as well as the small relative stroke length of traditional actuators. Ferromagnetic shape memory materials are good candidates for such devices as they exhibit a unique combination o…
We study two Kitaev-Heisenberg t-J-like models on a honeycomb lattice, focusing on the zigzag magnetic phase of Na(2)IrO(3), and investigate hole motion by exact diagonalization and variational methods. The spectral functions are quite distinct from those of cuprates and are dominated by large incoherent spectral weig…
The multi-thermo-responsive block copolymer of poly[2-(2-methoxyethoxy)ethyl methacrylate]-block-poly[N-(4-vinylbenzyl)-N,N-diethylamine] (PMEO2MA-b-PVEA) displaying phase transition at both the lower critical solution temperature (LCST) and the upper critical solution temperature (UCST) in the alcohol/water mixture i…
Ein unerwartet beständiges Dikation: Heptacen (eine Verbindung mit 4n+2 π-Elektronen) ist so reaktiv, dass es bislang nicht in Substanz isoliert werden konnte. Sein Dikation (eine Verbindung mit 4n π-Elektronen) kann aus Heptacendimeren in konzentrierter Schwefelsäure bei Raumtemperatur erhalten und in Abwesenheit von…
Germanium dioxide (GeO2 ) takes two forms at ambient pressure: a thermodynamically stable rutile-type structure and a high-temperature quartz-type polymorph. Here, we investigate the phase stability at finite temperatures by ab initio phonon and thermochemical computations. We use gradient-corrected density-functional…
The fumarate addition reaction, catalyzed by the enzyme benzylsuccinate synthase (BSS), is considered to be one of the most intriguing and energetically challenging reactions in biology. BSS belongs to the glycyl radical enzyme family and catalyzes the fumarate addition reaction, which enables microorganisms to utiliz…
It is demonstrated how acyclic diene metathesis polymerization (ADMET) provides an efficient strategy for the labeling of polyolefins. The versatility of phosphorus chemistry allows designing substituted BODIPY monomers or chain stoppers for the synthesis of precise labeled (degradable) polyphosphoesters.
Herein macromolecular recognition by cyclodextrins (CDs) is summarized. Recognition of macromolecules by CDs is classified as main-chain recognition or side-chain recognition. We found that CDs form inclusion complexes with various polymers with high selectivity. Polyrotaxanes in which many CDs are entrapped in a poly…
The geometrically frustrated double-perovskite Ba${}_{2}$YRuO${}_{6}$ has magnetic $4{d}^{3}$ Ru${}^{5+}$ ions decorating an undistorted face-centered-cubic lattice. This material has been previously reported to exhibit commensurate long-range antiferromagnetic order below ${T}_{N}\ensuremath{\sim}$ 36 K, a factor $f\…
Short graphite fiber/Al composites were fabricated by a modified two-step vacuum pressure infiltration technique. Copper-coated graphite fibers preform was infiltrated with liquid aluminum at 800℃ under infiltration pressure of 1 MPa and solidification pressure of 30 MPa for 30 min. The effects of surface modification…
The power of spray-dried TiO2 in LIBs: TiO2(B)/anatase is synthesized by spray drying and investigated as negative electrode material in Li-ion batteries. It exhibits excellent Li-ion storage performances, especially at high charge/discharge rates. The presence of the β phase of TiO2 improves Li-ion diffusivity. Addit…
Newly prepared gold(I) acetylide-based luminescent cation sensors 1c and 1d, which bear a novel three-armed flexible conformation, together with control molecule 2c, were synthesized in four steps. 1c and 1d exhibit the π → π* absorption of the acetylide ligands in fluid solutions and produce the (3)(ππ*) emission of…
Regular 3D periodic porous Ti-6Al-4 V structures were fabricated by the selective electron beam melting method (EBM) over a range of relative densities (0.17-0.40) and pore sizes (500-1500 µm). Structures were seeded with human osteoblast-like cells (SAOS-2) and cultured for four weeks. Cells multiplied within these s…
We report the nuclear magnetic resonance (NMR) and nuclear quadrupole resonance (NQR) measurements for non-centrosymmetric superconductors Re7B3, LaBiPt, and BiPd containing heavy elements. For all three compounds, the spin-lattice relaxation rate 1/T1 shows a coherence peak just below Tc and decreases exponentially a…