Materials Literature
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Self-assembling amphiphilic lipids or polymers have been successfully used in pharmacotherapy as drug solvents or carriers, improving the bioavailability of water-insoluble drugs. This review focuses on an unusual hypersensitivity reaction (HSR) caused by a micellar (Cremophor EL, CrEL) and a monomeric block copolymer…
A one-dimensional time-dependent model of the active magnetic regenerative refrigeration (AMRR) cycle is developed and is validated by experimental measurements. It is based on the convection exchange between a layer of fluid and a thin plate of magnetocaloric effect material. It takes into effect the magnetocaloric p…
We have measured the DC resistance R ( T ) and AC dielectric constant ε (ω) for the bistable high- R and low- R states of NiO thin film. The high- R state shows thermally activated resistance and Debye relaxation of ε (ω). In the low- R state, R ( T ) exhibits a metallic temperature dependence of R (300 K)/ R (5 K)=1.…
The ignition resistance of AZ91 alloy is investigated during continuous heating experiments and when held at constant temperature in the semisolid range. It is found that during continuous heating, ignition takes place close to the liquidus temperature when a significant amount of liquid is present. Similarly, ignitio…
Blends of poly(methyl methacrylate) (PMMA) and thermoplastic polyurethane (TPU) in different compositions viz., 95/5, 90/10, 85/15 and 80/20 (by wt/wt, % of PMMA/TPU) were blended by melt mixing using a twin‐screw extruder. All the PMMA/TPU blends have been characterized for physico‐mechanical properties such as densi…
Using a suitable disulfide-based devulcanizing agent, which cleaved the sulfur cross-links in vulcanized rubber at high temperature, devulcanization of gum natural rubber was carried out. High sulfur and medium sulfur, as well as low sulfur–containing rubber vulcanizates were used to study the cleavage of sulfidic bon…
Ecodesigns for nano-sized noble metal particles were investigated by a new liquid-solid (metal oxide-alcohol) system. We have reduced noble metal oxides as low-emission starting materials by ultrasound and tried to fabricate various noble metal nanoparticles (Ag, Au, Pt, Pd) at room temperature, Noble metal oxides wer…
ABSTRACT The physicochemical properties of acid‐soluble collagen (ASC) from refiner discharge and the partially purified collagen (PPC) from both the refiner discharge and the fish skin were evaluated. Yield of collagen from refiner discharge was 34% higher in PPC than ASC. Mercury, lead, cadmium, and chromium content…
For protection of elastomeric materials against ageing, antioxidants such as UV-stabilizers and antiozonants are used. Although historically N-phenyl-N'-(1,3-dimethylbutyl)-p-phenylenediamine (6PPD) was the only approved antiozonant in Germany, a range of other phenylene diamine antiozonants (excluding 6PPD) are permi…
Co-Zr-O granular films were prepared by reactive sputtering. The films show strong uniaxial in-plane anisotropy as well as good soft magnetic properties and high dc resistivity. In order to confirm their electrical characteristics at high frequency, the frequency and current density dependences of resistivity were inv…
We report on the optical absorption spectra of gold atoms and dimers deposited on amorphous silica in size-selected fashion. Experimental spectra were obtained by cavity ringdown spectroscopy. Issues on soft-landing, fragmentation, and thermal diffusion are discussed on the basis of the experimental results. In parall…
Synchrotron-radiation X-ray Photoelectron Spectroscopy (SRXPS) and conventional X-ray Photoelectron Spectroscopy (XPS) have been used to study a pristine fracture-surface of bornite (Cu5FeS4). Comparisons of these high-resolution spectra reveal, for the fi rst time, four distinct contributions to the S 2p spectra. The…
The phenomenon of spun yarn failure is strongly dependent on the yarn structure namely, the configuration, alignment and packing of the constituent fibers in the yarn cross-section. The structure of yarn is solely determined by the methods of consolidating the fibers into yarns. In the present study, ring, rotor, air-…
We study photoinduced optical responses of one-dimensional strongly correlated electron systems. The optical conductivity spectra are calculated for the ground state and a photoexcited state in the one-dimensional Hubbard model at half filling by using the exact diagonalization method. It is found that, in the Mott in…
The uses of X-ray anomalous scattering in crystal structure analysis have undergone a major expansion due to the refinement and ease of availability of the necessary X-ray instrumentation and methods. The structural chemistry and biology fields span a similar suite of technical needs but with widely differing molecula…
We review here research and development progress achieved in US Plasma Chamber technology roughly over the last decade. In particular, we focus on two major programs carried out in the US: the APEX project (1998-2003) and the US ITER TBM activities (2003-present). The APEX project grew out of the US fusion program emp…
We have studied crystal structures of two Pd(dmit) 2 -based molecular conductors, Et 2 Me 2 Sb[Pd(dmit) 2 ] 2 and Cs[Pd(dmit) 2 ] 2 , above and below their phase transition temperatures. The Et 2 Me 2 Sb salt undergoes a first-order transition from a Mott insulator to a non-magnetic state at ca. 70 K, while the Cs sal…
La spurrite, Ca 5 (SiO 4 ) 2 (CO 3 ), la tilleyite, Ca 5 (Si 2 O 7 )(CO 3 ) 2 , et la scawtite, Ca7(Si 6 O 1 8 )(CO 3 ).2H 2 O, sont les seuls mineraux carbonates-silicates de calcium connus a date; les trois sont caracteristiques de skarns de haute temperature. Des cristaux de spurrite et de tilleyite de la colline C…
In this study, resistivity and core size dependencies of eddy current loss were investigated for Fe-Si compressed powder cores. Over the resistivity of about 0.01 /spl Omega/m eddy current loss is independent on core height, however when the resistivity is lower than about 0.01 /spl Omega/m it increases with decrease…
The demagnetization behavior of commercial sintered Nd-Fe-B magnets was investigated for field directions inclined by 0/spl deg/, 45/spl deg/, and 90/spl deg/ with respect to the easy axis. For demagnetizing field strengths well below the coercivity, the reversible permeability parallel to the easy axis amounts to 1.0…