Materials Literature
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Conjugates between methotrexate (MTX, Matrex, N-[4-[[(2,4-diamino-6-pteridinyl)methyl]methylamino]benzoyl]-l-glutamic acid), an antifolate cancer chemotherapeutic to which resistance is often observed, and motexafin gadolinium (MGd), an experimental agent demonstrating selective tumor localization, are described. Thes…
Magnesium oxide (MgO), obtained using a novel but simple procedure, was systematically investigated as a heterogeneous base catalyst for reactions taking place in the liquid phase, specifically the Michael addition and the Knoevenagel condensation. The activity of MgO was studied in detail, together with the effects o…
The deformation systems in hexagonal close-packed (hcp) metals are not as symmetrically distributed as in cubic ones. Furthermore, because the primary slip systems are not as numerous and are limited to deformations in the <a> direction, twinning competes with slip in plastic deformation and can, dependi…
Coexistence between the isotropic and the nematic phase in suspensions of rods is studied using grand canonical Monte Carlo simulations with a bias on the nematic order parameter. The biasing scheme makes it possible to estimate the interfacial tension γIN in systems of hard and soft rods. For hard rods with L∕D=15, w…
The melt intercalation method was employed to prepare poly(butylene terepathalate)/montmorillonite nanocomposites, and their microstructure was characterized by wide angle X-ray diffraction and transmission electron microscopy. The XRD results showed that the crystalline plane such as (010), (111), (100) was smaller t…
Article Characterization of industrial and laboratory pulp fibres using HCl, Cellulase and FiberMaster analysis was published on January 1, 2005 in the journal Nordic Pulp & Paper Research Journal (volume 20, issue 1).
The burgeoning area of nanodielectrics has been fueled by the demonstration of enhanced electrical and mechanical properties observed in nanoparticle filled polymers. The high surface energy and vastly augmented surface area (in comparison to conventional composites) is thought to be the underlying reason for such ben…
In analogy to our successful "PX2+" insertion reactions, an "AsX2+" insertion route was explored to obtain new arsenic halogen cations. Two new salts were prepared: AsBr4+[Al(OR)4]-, starting from AsBr3, Br2 and Ag[Al(OR)4], and I2As-PI3+[Al(OR)]4 from AsI3, PI3 and Ag[Al(OR)4](R=C(CF3)3). The first cation is formally…
Mesoporous silica particles with high loadings of Al (Si/Al molar ratio 20 to 2) and Zr (Si/Zr molar ratio 37 to 5) were synthesized by evaporation induced self assembly (EISA) using an aerosol route. The aerosol synthesis process allows us to produce mesoporous silica particles with a high loading of heteroelements (…
In this paper the behavior of non-oriented laminations when excited with PWM waveforms is analyzed. The USA and the European experiences in core loss measurements with PWM waveforms are compared, highlighting the different experimental approaches and the different test benches. Parameters that characterize a PWM sourc…
A combination of direct current (d.c.) electric field and moderately elevated temperature is applied to a glass with embedded spherical silver nanoparticles in the near surface region. The field-assisted dissolution of silver nanoparticles leads to the formation of a layer of percolated silver clusters with modified o…
A carbon supported Pt-Ru catalyst with uniform distribution and small average size of the Pt-Ru particles was synthesized using a two-step spray pyrolysis (SP) method; the electrocatalytic activity of the prepared catalyst for methanol oxidation is better than that of the standard commercial catalyst.
The synthesis, crystal structures and magnetic properties of two hexanuclear Fe(6) clusters of general formula [Fe(6)(O)(2)(OH)(2)(O(2)CR)(10)(dipaH(2))(2)].xMeCN.yH(2)O (R = Ph, x= 5.5, y= 1 (1), R = C(Me)(3), x= 2, y= 3 (2)) are reported. The presence of the flexible amino-alcohol ligand diisopropanolamine (dipaH(3)…
A new method has been developed for the preparation of core-shell particles with thick, pH-responsive, polymer shells. In the first step, poly(vinylpyridine)(PVP) microgel particles are adsorbed onto oppositely-charged, ∼5 µm diameter silica spheres, to form "raspberry-like" structures. After separation, these "raspbe…
The design and chemical synthesis of a series of hybrid flexible self-assembling supramolecules utilising both crown ether-naphthalene diimide host-guest chemistry and metalloporphyrin-pyridyl coordination is discussed. The resulting compound structures and dynamics are probed using a variety of techniques, including…
Results of dielectric studies for three tolane derivatives containing the isothiocyanato (NCS) and alkyl or alkoxy groups in the terminal positions are presented. A relaxation process associated with molecular rotations around the short axes has been observed in the crystal‐like smectic phases (B, E, K). The K phase w…
We report strong experimental evidence on the formation of a molecular lyotropic phase in water of a modified polyaramide, namely a fully sulfonated poly(p-phenylene terephthalamide) (Sulfo2PPTA) that exhibits similar liquid crystalline behaviour in water to its non-sulfonated counterpart (PPTA, commercially known as…
The solubility of drugs in solvents is fundamentally important for drug development and manufacturing. As the experimental measurements of the solubility are extremely laborious tasks, reliable prediction methods are highly required. We have employed the conductor-like screening model for real solvents (COSMO-RS) in p…
Abstract A quantum spin‐correction scheme based on spin‐correlation functions is proposed for multiple bond‐breaking processes described by the unrestricted single determinant (USD) approaches, such as unrestricted Hartree–Fock (UHF) and unrestricted Kohn–Sham (UKS) density functional theory (DFT). It is known that na…
A soft hydrolysis technique involving static anion exchange has been developed in order to prepare extra-pure, hydroxide-free solutions of aluminium polyoxocations (Al13 and Al30) as well as for the preparation of nanosized, highly monodisperse aluminium hydroxide particles in the particle size range 5–150 nm. Quantit…