Materials Literature
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In this work, a Taguchi experimental design has been used to identify important factors that influence the procedure of synthesis and purification of the lutetium bisphthalocyanine (LuPc2). The working conditions have been improved using an L8 (27) experimental design. A statistical analysis of the experimental data r…
ZnO thin films were grown on Si(100) and sapphire (001) substrates by an in situ ultraviolet‐assisted pulsed laser deposition technique. Using this technique, highly textured ZnO films were grown on Si substrates even at 100°C. Films grown on sapphire (001) at temperatures higher than 400°C, were found to be epitaxial…
A modified reverse micelle process has been developed for the synthesis of nanospherical amorphous zircon precursor powders. It has been found that the hydrolysis of a mixture of zirconium and silicon alkoxides within the water phase of a microemulsion can produce amorphous, nanospherical particles with a stoichiometr…
The sixfold phenyl embrace (6PE) is manifest in the crystal structures of approximately 30% of the 5089 molecules with PPh3 ligands (in the Cambridge Structural Database). This paper describes the characteristics and occurrence of the 6PE as a crystal supramolecular motif between metal complexes and clusters with PPh3…
Polyurethane-urea without ether linkages was synthesised using dicyclohexyl-methane diisocyanate (SMDI), hydroxy-terminated polybutadiene (HTPBD) and m-phenylenediamine (PDA). The hydrolytic stability of this polymer was investigated under in vitro conditions using Ringer's solution and phosphate-buffered saline, and…
The cathodic reaction mechanism of a solid oxide fuel cell (SOFC) was investigated for an electrode‐electrolyte system of La 0.6 Ba 0.4 CoO 3 ( LBC ) ‐ BaCeO 3 , under both the O 2 − conducting and H + / O 2 − mixed‐ionic conducting conditions. AC impedance measurements were carried out, and the electrode interfacial…
At present, only a little is known about the transcriptional regulation in chondrocytes submitted to various physicomechanical factors known to exist in articular cartilage. Recently, we have investigated the effects of hydrostatic pressure on transcriptional control in chondrocytes using human chondrosarcoma and immo…
Ozonation of aqueous solutions of succinic acid ([SA]0=1 mM) was studied in the presence of ruthenium (2%) deposited on cerium dioxide catalysts. The influence of ruthenium, of the catalyst preparation mode (impregnation or exchange), of the support pretreatment, of the surface area and of the final treatment of the c…
The [CaM(mal)2(H2O)4] (M = Mn, Fe or Co; mal = C3H2O4) and [CaNi(mal)2(H2O)4]·2H2O compounds have been synthesized and characterized. X-Ray single crystal diffraction analysis was carried out on the [CaMn(C3H2O4)2(H2O)4] and [CaNi(C3H2O4)2(H2O)4]·2H2O complexes. The [CaM(C3H2O4)2(H2O)4] (M = Fe or Co) compounds are co…
Post-synthesis recrystallisation of calcined small crystallite MCM-41 has been used to prepare highly ordered large crystallite MCM-41 materials in a two step synthesis route. The calcined small crystallite `primary' MCM-41, obtained from the first step, is used as the `silica source' in an otherwise normal secondary…
This research explores the longitudinal and latitudinal mechanical properties of injection-molded isotactic polypropylene (iPP) prepared in a uniaxial oscillating stress field by oscillating packing injection molding (OPIM). The methods, processing conditions, and mechanical test results for iPP by conventional inject…
A new type of oil-resistant thermoplastic elastomer of nitrile rubber (NBR) and polyoxymethylene (POM) prepared by dynamic vulcanization were studied. The effects of the curing systems for NBR, acrylonitrile content in NBR, POM content, thermal aging, and reprocessing have on the mechanical properties of NBR/POM therm…
1-Alkyl and 1,8-dialkyl-1,4,8,11-tetraazacyclotetradecanes (alkyl = benzyl or methyl) were synthesised through cis -aminal of cyclam which was obtained by reaction of glyoxal and cyclam. The corresponding trans -aminal was synthesised from the respective linear tetraamine and glyoxal followed by cyclisation using 1,2-…
Bis(thf)(porphyrinato)iron(III) complexes with highly S4-ruffled and S4-saddled porphyrin cores are determined to be very pure intermediate spin complexes on the basis of NMR, EPR, Mössbauer, and magnetic data.
Ti alloy disks were separately worn with pins of the same alloy or apatite ceramics in Eagle’s medium. Wear powders sterilized in either a heating oven or ethanol were separately added to culture media. The effect of the Ti wear powder sterilized in a heating oven on cell viability was smaller than that of powder ster…
Melt crystallization behaviors of poly(ethylene terephthalate) (PET) and poly(ethylene terephthalate-co-isophthalate) (PETI) containing 2 and 12 mol % of noncrystallizable isophthalate components were investigated. Differential scanning calorimetry (DSC) isothermal results revealed that the introduction of 2 mol % iso…
α‐Alumina was fabricated by dry pressing mixtures of seeded boehmite and fine α‐alumina (i.e., 0.2 and 0.3 μm diameter) to reduce the large shrinkage of boehmite‐derived α‐alumina. The maximum green density was obtained with mixtures containing ∼70%α‐alumina for both alumina powders. The ∼15% linear shrinkage and micr…
In the biomineralization process, a number of Pro-rich proteins participate in the formation of three-dimensional supramolecular structures. One such protein superfamily, the Pro,Gly-rich sea urchin intracrystalline spicule matrix proteins, form protein-protein supramolecular assemblies that modify the microstructure…
The results of an ab initio Hartree–Fock study of the cluster molecular model mimicking the ditrigonal cavity of montmorillonite are reported. Full optimization of the geometry has been applied for the Si6Al6O30H18 cluster using the HF/6-31G(d) basis set. In order to obtain a model of the isomorphic substitution in th…
The hydrolytic sol–gel polymerization of a variety of molecular precursors, (RO)3Si–X–Si(OR)3 with different structural features, has been investigated varying the temperature from −20 to +110 °C. 'Rigid' precursors (R = Me, X = 1,4-C6H4, ferrocene-1,1′-diyl), 'semi-rigid' precursors (R = Me, X = CH2CH2-1,4-C6H4CH2CH2…