Materials Literature
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Purpose: Entacapone, a catechol-O-methyltransferase inhibitor, is poorly water soluble (BCS class IV). The dissolution profile of pure Entacapone is improved in the presence of an alkaline buffer and after addition of a surfactant by facilitating the drug release process at the solid/liquid interface. Rationale: Accor…
The Odd-Even graceful labeling of a graph G with q edges means that there is an injection f : V (G) to f1;3;5;:::;2q +1g such that, when each edge uv is assigned the label jf(u) f(v)j, the resulting edge labels are f2;4;6;:::;2qg. A graph which admits an odd-even graceful labeling is called an odd-even graceful graph.…
In this paper, a numerical three-dimensional (3D) model of electromagnetic lefthanded metamaterials (LH MTM) is applied for the modelling of composite right-left handed (RH/LH) structures with a graded refractive index profile commonly named GRIN MTM. The core of this model is Transmission Line Matrix (TLM) Z-transfor…
UNLABELLED: Ophiusa disjungens is one of the main insect pests that attack Myrtaceae species. Nucleopolyhedroviruses (NPVs) of the Baculoviridae family have been used for decades as biological pesticides to control insect pests. A new NPV, named Ophiusa disjungens nucleopolyhedrovirus (OpdiNPV), was recently isolated…
Ge/Si heterostructures with Ge self-assembled quantum dots (SAQDs) grown at various temperatures by molecular beam epitaxy were investigated using resonant Raman spectroscopy and capacitance measurements. The occurrence of quantum confinement effects was confirmed by both techniques. For the structures grown at low te…
Fibre fly generation is a major problem for the textile industry, not only for health rea sons but also because of quality problems associated with products. In this work, fiber fly generation during the cone-winding process was studied’ emphasizing the effect of yarn spinning parameters. 100% acrylic yarns were produ…
We demonstrate detection of 250 attomoles of Rhodamine 6G using an inkjet-fabricated SERS-active paper-based surface swab-dipstick. The fabrication simplicity and ease of use of this device is unprecedented for SERS-based analytics.
The conjugates of 60 fullerene and lipophilic meso-aryl substituted porphyrins with terminal long chains are prepared and used to form Langmuir monolayers at the air/water interface.
Common tests for measuring the threshold for shock initiation are the NOL large scale gap test (LSGT) with a 50.8-mm diameter donor/gap and the expanded large scale gap test (ELSGT) with a 95.3-mm diameter donor/gap. Despite the same specifications for the explosive donor and polymethyl methacrylate (PMMA) gap in both…
Yttria-stabilized zirconia (YSZ) fibers various widths ranging from 36 to 66 µm of width were prepared by a drying process at 363 K from a zirconia sol containing 4 mol % yttria with 40 nm of primary particle size. The effects of preparation method on the crystal phase, microstructure and electrical properties of the…
Sawdust produced during the chopping of trees is a major waste product causing pollution of air as well as of the Lagos Lagoon in Nigeria. Sawdust from 20 different trees processed in the wood industry has been delignified successively by the Kraft process and hydrogen peroxide followed by Trichoderma viride cellulose…
The effects of heat treatment and quenching regimens on the electrochemical corrosion behaviour of aluminium alloy AA8011 in 0.1M H2SO4 was studied by open circuit potential (OCP), potentiodynamic polarization (PP) and electrochemical impedance spectroscopy (EIS) measurements. Three different specimens (unheated, air…
The role of antisymmetry in the refraction processes of electromagnetic waves of the TM and TE type that recede from nonmagnetic media at an arbitrary angle on the surface of a compensated antiferromagnet for a longitudinal magnetooptical configuration is examined.
South Africa is one of the first countries to implement full-scale mine water reclamation to drinking water quality. Reverse osmosis is already being used on full scale for desalination of mine water. However, with increased recycling of mine water, the result has been the increased generation of sludge. The Council f…
m=1 nm), are a growing international trend o!ering the opportunity to control material properties including improving electrical conductivity, optical properties, catalysis, mechanical strength and biological activity. Simultaneously, nanotechnology o!ers the ability to create biologically inspired surface properties…
Zr-bearing coatings were fabricated on an AZ91D magnesium substrate by means of a two-step method. First, pure zirconium powder was plasma sprayed on the substrate and, subsequently, laser cladding was performed on top of the spray deposited layer. The process led to the formation of a zirconium coating containing zir…
The oral buccal mucosa is a promising absorption site for drug administration because it is permeable, highly vascularized and allows ease of administration. Although there are many platforms that have been used for drug delivery, nanofiber scaffolds as a platform for local or systemic drug delivery through the oral m…
Abstract: A series of bismuth based superconducting materials doped with galliumBi1.7Pb0.4Sr2Ca2Cu3-xGaxOy (x = 0.0, 0.02, 0.04, 0.06, 0.08 and 0.10) was synthesized by Simple solid-state reaction method. The samples were characterized by X-ray diffraction, EDX analysis and electrical resistivity and ac magnetic susce…
The purpose of this paper is to present a detailed experimental procedure for the quantitative determination of initiation fracture toughness and full-field strain measurement of rock material under dynamic loads. Notched semi-circular bending tests were conducted using a split Hopkinson pressure bar (SPHB) system. Ex…
The present study reports a novel chemical route to synthesize different sizes of conducting polypyrrol (ppy) nanoparticles by hydrogen-bonding directionality in the presence of a crown ether, ionic liquid ([octmim] Br , octhyl-methyl imidazulim bromide) and ammonium persulfate in HCl solution. The morphology of the n…