Materials Literature
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The optical spectra and electron paramagnetic resonance parameters (g factors g||, g⊥ and hyperfine structure constants 171A||, 171A⊥, 173A|| and 173A⊥) for the tetragonal (D2d) Yb3+ centers in AWO4 (A=Ca, Sr, Pb and Ba) scheelite crystals are reinvestigated using a complete diagonalization (of energy matrix) method.…
Two anionic surfactants, sodium dodecyl sulfate (SDS) and sodium dodecylbenzensulfonate (SDBS), were intercalated into Mg2Al layered double hydroxides (LDHs) using the anion exchange method. Then an alkylating oxazaphosphorine anticancer agent, ifosfamide (IFO), was intercalated into the surfactant-modified LDHs. The…
We demonstrate a synchronous (lock-in) technique for imaging thin-film magnetization dynamics using scanning transmission x-ray microscopy (STXM). Gated photon counting synchronized with magnetic field modulation allows image acquisition with differential contrast for high and low magnetization. We have applied this t…
Previously, a native homoethanol pathway was engineered in Escherichia coli B by deletions of competing pathway genes and anaerobic expression of pyruvate dehydrogenase (PDH encoded by aceEF-lpd). The resulting ethanol pathway involves glycolysis, PDH, and alcohol dehydrogenase (AdhE). The E. coli B-derived ethanologe…
The effects of annealing on the molecular orientation in polytetrafluoroethylene (PTFE) thin films evaporated on copper and silicon plates were studied using F K ‐edge near‐edge X‐ray absorption fine structure (NEXAFS) spectroscopy. The intensity of the F 1 s → σ *(C‐F) transition in the NEXAFS spectrum from a non‐ann…
An experiment on retail film packaging system was conducted to compare the atmospheric composition within sealed packs containing rambutan fruits. This research was done in order to study the effect of packaging films with different permeability on the some of physicochemical properties of rambutan during storage at 1…
Blumen und Sterne: Eine nasschemische Synthesemethode für amphiphile stäbchenförmige Siliciumdioxidpartikel mit hydrophilen (grün im Bild) und hydrophoben Blöcken (rot) wurde entwickelt. Abhängig von den Eigenschaften der stäbchenförmigen Partikel und vom Lösungsmittel ergibt die Selbstorganisation verschiedene Strukt…
The absence of reliably functioning small-diameter vascular grafts for coronary artery bypass graft surgery remains one of the most important issues of cardiovascular surgery. Tissue-engineered grafts have to be characterized by highly hemocompatible, biomechanical and biocompatible properties, be quickly biodegradabl…
We report the draft genome sequence of Pseudomonas psychrotolerans strain L19, isolated from a European 50-cent copper alloy coin. Multiple genes potentially involved in copper resistance were identified; however, it is unknown if these copper ion resistance determinants contribute to prolonged survival of this strain…
Abstract Die heterogen katalysierte Dehydratisierung von nachwachsenden C5‐Rohstoffen zu Furfural mit Wasser als einzigem Lösungsmittel wird beschrieben. Furfural kann fossile Verbindungen im großen Maßstab für Polymere, Lösungsmittel, Feinchemikalien und Treibstoffe ablösen. Zur Erreichung dieses Ziels wurden kommerz…
The effect of hyperstabilization of martensite implies that the reverse martensitic transformation proceeds in two well separated stages. Namely, a small fraction of martensite (of the order of 10%) retransforms upon heating into the parent phase over a temperature range slightly higher than the nominal reverse transf…
A novel vanadium pentoxide (V2O5) nanoplatelet has been prepared by an oxalic acid assisted sol–gel method using β-cyclodextrin as an exfoliation agent followed by sintering at a high temperature. Crystal structure and morphology are analyzed using X-ray diffraction (XRD) and scanning electron microscopy (SEM), respec…
To fabricate functionally graded materials, a highly concentrated slurry of SiO 2 ‐ Mo system was prepared and centrifugal force was applied in an attempt to achieve a graded composition. Subsequently, we formed a homogeneous green body with compositional gradation by floc‐casting at 80°C, which was then fired at 1750…
Abstract Understanding the crystallization of calcium carbonate is relevant in numerous fields like biomineralization, geology and industrial applications where calcium carbonate forms. In order to enhance the knowledge about the formation of calcium carbonate with focus on the vaterite polymorph, in this work calcium…
In a recent contribution to this journal, it was shown that the transition temperatures of optimal high-T(C) compounds obey the algebraic relation T(C0) = k(-1)(B)/ℓζ, where ℓ is related to the mean spacing between interacting charges in the layers, ζ is the distance between interacting electronic layers, β is a unive…
Field-induced domain wall (DW) propagation was evidenced in unpatterned layers of in-plane magnetized Ga${}_{1\ensuremath{-}x}$Mn${}_{x}$As${}_{1\ensuremath{-}y}$P${}_{y}$ using Kerr microscopy. Both stationary and precessional regimes were observed, and domain wall velocities of up to 500 m s${}^{\ensuremath{-}1}$ we…
Nanoenergetic materials are the key to great advances in microscale energy‐demanding systems as actuation part, igniter, propulsion unit, and power. An important challenge of energetic materials for microelectromechanical system (MEMS) is the compatibility of standard microsystem techniques with technology process emp…
A read head composed of a spin-torque oscillator (STO) has been proposed for a hard disk drive (HDD). The STO read head senses the media field as modulation in its oscillation frequency, enabling high signal-transfer rate beyond the limit of ferromagnetic relaxation. Although frequency stability of STOs is poor becaus…
The local structural changes in amorphous calcium phosphate (ACP)-based dental composites were studied under isothermal conditions using both static, bulk measurement techniques and a recently developed methodology based on combined ultra-small angle X-ray scattering-X-ray photon correlation spectroscopy (USAXS-XPCS),…
Charged particles interacting with a bent crystal can be trapped in channeling states and deflected by the atomic planes of the crystal lattice. The use of bent crystals for beam manipulation in particle accelerators is a well assessed concept rapidly evolving into practical applications. In the last three decades, a…