Faculty of Science: Recent submissions

Now showing items 601-620 of 655

A thermodynamic perturbation theory for the surface tension and ion density profile of a liquid metal

Evans, R; Kumaravadivel, R (1976)

Assuming that the interaction between metallic pseudo-ions is of the form introduced by Evans (1974, 1975), an approximate expression for the excess free energy of the system is derived using the thermodynamic perturbation ...
Substantial pressure effect on the resistivity and Curie temperature for the diluted magnetic semiconductor Sb 2-xv xTe 3

Dyck, J.S; Ahilan, K.; Aronson, M.C; Uher, C; Lošt'ák, P (WILEY-VCH Verlag GmbH & Co. KGaA, 2006-07)

The influence of hydrostatic pressure on the electrical resistivity ρ and ferromagnetic transition temperature T C of bulk, single crystal Sb 1-xV xTe 3 with x = 0.03 is presented. Pressure strongly suppresses ρ at all ...
In vitro control of Staphylococcus aureus (NCTC 6571) and Escherichia coli (ATCC 25922) by Ricinus communis L.

Christy Jeyaseelan, E; Justin Jashothan, P.T (Asian Pacific Tropical Biomedical Magazine, 2012-09)

Objective: To evaluate antibacterial activity of hot and cold ethanol and methanol leaf extracts of Ricinus communis L (R. communis) against Staphylococcus aureus (S. aureus) (NCTC 6571) and Escherichia coli (E. coli) (ATCC ...
IQ-motif selectivity in human IQGAP2 and IQGAP3: Binding of calmodulin and myosin essential light chain

Atcheson, E.; Hamilton, E; Pathmanathan, S; Greer, B; Harriott, P; Timson, D.J (Biochemical Society, 2011-10)

The IQGAP [IQ-motif-containing GAP (GTPase-activating protein)] family members are eukaryotic proteins that act at the interface between cellular signalling and the cytoskeleton. As such they collect numerous inputs from ...
The design of metal chelates with biological activity. Part 6. Nickel and iron complexes of glycylglycinehydroxamic acid and triglycinehydroxamic acid

Brown, D.A; Mageswaran, R (1989-07)

Monohydroxamic acids of the peptides glycylglycine and triglycylglycine are reported and fully characterised. Their NMR spectra indicate the presence of Z and E isomers analogous to those recently reported for the simple ...
The effect of polymer optoelectronic properties on the performance of multilayer hybrid polymer/TiO2 solar cells

Ravirajan, P.; Haque, S.A; Durrant, J.R; Bradley, D.D.C.; Nelson, J (WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim, 2005-04)

We report a study of the effects of polymer optoelectronic properties on the performance of photovoltaic devices consisting of nanocrystalline TiO 2 and a conjugated polymer. Three different poly(2-methoxy-5-(2′-ethylhex ...
Solid state solar cell made from nanocrystalline TiO2 with a fluorene-thiophene copolymer as a hole-conductor

Ravirajan, P.; Haque, S.A.; Poplavskyy, D.; Durrant, J.R.; Bradley, D.D.C.; Nelson, J. (2003-08)

We study the charge recombination kinetics and photovoltaic performance of composites of poly (9,9-dioctylfluorene-co-bithiophene) polymer with nanocrystalline TiO2. Transient optical spectroscopy confirms that photoexciation ...
Photovoltaic devices based on nanocrystalline TiO2 and a fluorene-thiophene copolymer

Ravirajan, P.; Haque, S.A.; Poplavskyy, D.; Durcant, J.R.; Bradley, D.D.C.; Nelson, J. (2003-05)

We report studies of charge recombination and photovoltaic device performance in structures consisting of a fluorene-bithiophene co-polymer and nanocrystalline TiO2. Efficient photoinduced charge transfer is observed using ...
Nanoporous TiO2 solar cells sensitised with a fluorene-thiophene copolymer

Ravirajan, P.; Haque, S.A.; Poplavskyy, D.; Durrant, J.R.; Bradley, D.D.C.; Nelson, J. (Elsevier B.V, 2003-06)

Composites of nanostructured metal oxides with conjugated polymers are promising material combinations for efficient solar energy conversion. However, performance of such combinations is normally limited by the low interfacial ...
Thermodynamic properties of liquid metals

Kumaravadivel, R (1983)

The ability of the model potentials to yield accurate thermodynamic properties of liquid metals is tested. The pressure and bulk moduli calculated by the homogeneous deformation (HD) method depend on the electron density ...
The entropies and structure factors of liquid simple metals

Kumaravadivel, R; Evans, R (1976)

Some results of a systematic study of the entropies and structure factors of fourteen liquid simple metals are presented. The ab initio model potentials of Shaw (1968) and the dielectric function of Vashista and Singwi ...
The Born-Green equation for liquid metals

Kumaravadivel, R; Evans, R; Greenwood, D.A (1974)

Conflicting reports have appeared in the literature concerning the usefulness of the Born-Green equation to determine effective interionic pair potentials in liquid metals from measured structure factors. To elucidate the ...
Pair potentials and structure factors of liquid alkali metals

Kumaravadivel, R; Tosi, M.P (Società Italiana di Fisica, 1984-07)

Measured structure factors of liquid alkali metals are examined in the framework of screened pair potential theory. Information on the main attractive well in the effective pair potential is obtained from the structural ...
Calculations of the surface energy of simple liquid metals

Kumaravadivel, R; Evans, R (1975)

Calculations of the surface energy of eleven liquid metals are presented. These are based on the recently proposed pseudo-atom theory of Evans (see abstr. A72625 of 1974). The results are in good agreement with experiment ...
Effect of morphology on electron drift mobility in porous TiO2

Aduda, B.O.; Ravirajan, P.; Choy, K.L.; Nelson, J (2004)

Porous titanium dioxide is an attractive material for solar cell application on account of its stability, electron transport properties, and the possibilities for controlling surface morphology as well as for its ease of ...
Hybrid polymer-metal oxide thin films for photovoltaic applications

Boucle, J.; Ravirajan, P.; Nelson, J. (The Royal Society of Chemistry, 2007)

We review progress in the development of organic-inorganic hybrid photovoltaic materials consisting of a conjugated polymer as an electron donor and a nanocrystalline metal oxide as the electron acceptor. We distinguish ...
Erroneous intracranial pressure measurements from simultaneous pressure monitoring and ventricular drainage catheters

Birch, A.A; Eynon, C.A; Schley, D (Humana Press Inc, 2006-08)

The objective of this report is to highlight the potential for false pressure measurements from systems that combine intracranial pressure (ICP) measurement and ventricular drainage. If the ports of the drain become blocked ...
Dynamics of a structured slug population model in the absence of seasonal variation

Bees, M.A; Angulo, O; López-Marcos, J.C; Schley, D (World Scientific Publishing Company, 2006-12)

We develop a novel, nonlinear structured population model for the slug Deroceras reticulatum, a highly significant agricultural pest of great economic impact, in both organic and non-organic settings. In the absence of ...
Preliminary observations on the reproductive biology of six species of Sri Lankan sea snakes (Elapidae: Hydrophiinae)

de Silva, A; Ukuwela, K.D.B; Sivaruban, A; Sanders, K.L (Deutsche Gesellschaft für Herpetologie und Terrarienkunde e.V. (DGHT), 2011-11)

We report on observations on the reproductive biology of viviparous sea snakes (Hydrophiinae) collected from marine fishing bycatches in Sri Lanka. Reproductive conditions were classified only in females by checking for ...
Unified global optimality conditions for smooth minimization problems with mixed variables

Jeyakumar, V; Srisatkunarajah, S; Huy, N.Q (EDP Sciences, 2008-07)

In this paper we establish necessary as well as sufficient conditions for a given feasible point to be a global minimizer of smooth minimization problems with mixed variables. These problems, for instance, cover box ...

Now showing items 601-620 of 655

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