Materials Literature
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Abstract In this study, oil palm empty fruit bunch (EFB) pulp was used as reinforcing agent in polypropylene composite. EFB pulp was prepared using soda pulping with different concentrations of sodium hydroxide (NaOH) solution. Overall, the tensile and flexural properties specifically the strength and the toughness sh…
Recently, nanometer-sized magnetic particles have been intensively concerned and investigated due to their particularly large surface-to-volume ratio, quantum-size effect, magnetic character as well as their potential application in the area of bioscience and medicine. The most promising nanoparticles are magnetic iro…
The self-assembly behavior of two sandwich-type mixed (phthalocyaninato)(porphyrinato) europium double-decker complexes, namely Eu(Pc)(TClPP) [Pc = phthalocyaninate; TClPP = meso-tetrakis(4-chlorophenyl)porphyrinate] (1) and optically active (R)- and (S)-EuH[Pc(OBNP)(2)](TClPP)] [Pc(OBNP)(2) = phthalocyaninate with tw…
Abstract Experimental design was used to optimize the processing parameters for the decomposition of poly(vinyl chloride). Factorial design and face centered composite design (FCC) were applied to determine the optimum conditions. A total of 10 g PVC powder was mixed with different amounts of zinc stearate (ZnSt 2 ) a…
Abstract Surface of nylon membrane was modified by the graft copolymerization of glycidyl methacrylate (GMA) using persulfate and thiosulfate as redox initiator system. Effect of various reaction parameters such as initiator concentration, monomer concentration, polymerization time, and temperature on degree of grafti…
We present the results of muon-spin relaxation $({\ensuremath{\mu}}^{+}\text{SR})$ measurements on the hexagonal manganite ${\text{HoMnO}}_{3}$. Features in the temperature-dependent relaxation rate $\ensuremath{\lambda}$ correlate with the magnetic transitions at 76, 38, and 34 K. The highest temperature transition,…
Abstract The dehydration kinetics of theophylline monohydrate is a two‐stage process. The first stage involves loosening of the crystal water followed by a second stage in which the water evaporates from the sample. During differential scanning calorimetry (DSC) measurements, the kinetics of the two stages can be dram…
We theoretically study Josephson vortex structures in Josephson junctions which have multiple tunneling channels caused by multiple superconducting gaps. Deriving ``coupled sine-Gordon equations'' from the free-energy taking account of the multiple tunneling channels, we examine two typical situations, a heterotic jun…
An effective purification method for single-walled carbon nanotubes (SWNTs) based on a combination of oxidative acid treatment and reversible noncovalent functionalization with 1-pyreneacetic acid is reported. The functionalization was selective toward the nanotubes, allowing a nearly complete removal of residual meta…
Abstract Fibrous membranes of cellulose acetate (CA), poly(vinyl pyrrolidone) (PVP) and composite membranes of these polymers, were obtained by the electrospinning method. Using systematic method, the optimal conditions for preparation of fibrous membranes were found. Both CA and PVP a concentration of 8% weight was f…
Abstract Polyazomethinethiosemicarbazone (PATS) metal complexes of Ni(II), Co(II), Cu(II), Zn(II), Cd(II) and Hg(II) metal ions were prepared by reacting the polymer ligand (PATS) with the appropriate metal salt in refluxing DMSO. Elemental analyzes as well as FTIR and electronic spectral data are presented to confirm…
Abstract Optische Signale von Einzelmolekülen liefern Informationen über die Struktur und Dynamik ihrer nanoskaligen Umgebung, frei von zeitlichen und räumlichen Mittelungen. Die so erhaltenen Daten sind von Nutzen, wenn komplexe Strukturen oder Dynamiken auftreten, wie bei Polymeren oder porösen Oxiden, aber auch bei…
The template-directed assembly of two planar molecules (copper phthalocyanine (CuPc) and pentacene) on SiC nanomesh has been studied by scanning tunneling microscopy and photoelectron spectroscopy, respectively. Both molecules are trapped as single molecules in the cells of SiC nanomesh at low coverage. At high covera…
Abstract An effective condition of graft polymerization of acrylonitrile onto cellulose fiber in large volume of KMnO 4 /citric acid aqueous solution was examined and the produced grafted copolymers were characterized by using SEM, NMR, FTIR, XRD, TGA, and DSC in comparison with component homopolymers. Graft yield, GY…
Abstract The reaction of Cu(ClO 4 ) 2 · 6H 2 O with N 4 O 3 coordinating heptadentate (H 3 L 1 ) and N 2 O coordinating tridentatereduced Schiff base (HL 2 ) ligands yielded copper(II) tetranuclear complexes [Cu 4 (L 1 ) 2 ](ClO 4 ) 2 ( 1 ) and [Cu 4 (L 2 ) 4 ](ClO 4 ) 4 ( 2 ), respectively. Complex 1 crystallizes in…
A novel hybrid material comprising silver aggregates supported on the porous structure of a free-standing carbon nanotube film was devised and fabricated. This material readily allows filtration of large volumes of fluids, while retaining the active analytes on silver aggregates so that their characteristic surface-en…
Short carbon fiber reinforced poly(trimethylene terephthalate) composites (PTT/SCF) were investigated in their rheology behaviors, phase morphology, electrical, mechanical, and thermal properties by capillary rheometer, scanning electron microscope, universal tester, high insulation resistance meter, Q meter, and ther…
We report coral-inspired calcium carbonate deposition via sequestration of CO 2 directly from the atmosphere. We observed that a CaCl 2 solution containing basic components and carbonic anhydrase induced aragonitic spherulites and acicular morphologies of CaCO 3 at the air/solution interface, through the reaction of c…
Aggregating into multicellular spheroids within alginate–poly-L-lysine–alginate (APA) microcapsules is important in maintaining the cellular viability and specific functions. However, in the absence of a vascular network, cells in the core of large-sized spheroids are gradually necrotic because of oxygen transfer limi…
Abstract In this study, we synthesized an aromatic ester plasticizer with ether oxygen bonds called bis[2‐(2‐methoxyethoxy)ethyl]phthalate (BMEP), which could dissociate sodium thiocyanate (NaSCN) by a coordination effect between the ether oxygen bond and the Na + cations. An antistatic plasticizer (AP) for poly(vinyl…