Abstract: The present invention relates generally to a relatively stable magnetic photocatalyst comprising an insulated magnetite core coated with a layer of photoactive titanium dioxide. In one example the insulation layer is silicon dioxide which blocks direct electrical contact between the titanium dioxide and the magnetite.

Abstract: A method and microbial culture medium for inhibiting homoserine lactone and/or acylated homoserine lactone regulated processes in microorganisms using furanone compounds.

Abstract: In compressed video signals, lost or erroneous information in a current image signal received at the receiving end of a transmission channel is concealed by identifying a motion compensated equivalent region in a previously transmitted image and substituting the equivalent region as a prediction of the lost or erroneous information in the current image.

Abstract: A quantum computer comprising a semiconductor substrate into which donor atoms are introduced to produce an array of donor nuclear spin electron systems having large electron wave functions at the nucleus of the donor atoms, where the donor electrons only occupy the nondegenerate lowest spin energy level. An insulating layer above the substrate. Conducting A-gates on the insulating layer above respective donor atoms to control strength of the hyperfine interactions between the donated electrons and the donor atoms' nuclear spins, and hence the resonance frequency of the nuclear spins of the donor atoms. Conducting J-gates on the Insulating layer between the A-gates to turn on and off electron mediated coupling between the nuclear spins or adjacent donor atoms.

Abstract: A method of making contacts on solar cells is disclosed. The front surface (41) of a substrate (11) is coated with a dielectric or surface masking layer or layers (12) that contains dopants of the opposite polarity to those used in the surface of the substrate material (11). The dielectric layers or layers (12) not only acts as a diffusion source for forming the emitter for the underlying substrate (11) when heat treated, but also acts as a metallization mask during the subsequent electroless plating with solutions such as nickel and copper. The mask may be formed by laser scribing (14) which melts the layer or layers (12), thereby more heavily doping and exposing zones (15) where metallization is required.

Abstract: There is disclosed a method of constructing photosensitive waveguides on silicon wafers through the utilization of a Plasma Enhanced Vapor Deposition (PECVD) system. The deposition is utilized to vary the refractive index of resulting structures when they have been subject to Ultra Violet (UV) post processing.

Abstract: An electron device for single spin measurement, comprising: a semiconductor substrate into which at least one donor atom is introduced to produce a donor nuclear spin electron system having large electron wave functions at the nucleus of the donor atom. An insulating layer above the substrate. A first conducting gate on the insulating layer above the donor atom to control the energy of the bound electron state at the donor. A second conducting gate on the insulating layer adjacent the first gate to generate at least one additional electron in the substrate. In use, a single electron is bound to the donor, and the donor atom is weakly coupled to the additional electron(s) in the substrate. The gates are biased so that the additional electron(s) in the substrate will move to the donor, but only if the spins of the electrons and the donor electron or nucleus are in a relationship which permits the movement.

Abstract: Methods of production of desired recombinant proteins, polypeptides and peptides are disclosed which utilize mammalian host cells engineered for autonomous and regulated growth in low cost protein/serum-free culture media. Preferred host cells express insulin or an insulin-like growth factor, and/or transferrin and are engineered so that addition of an inducer (e.g., ZnCl2+CdCl2) halts growth and simultaneously induces the expression of the desired recombinant protein, polypeptide or peptide.

Abstract: The invention relates to novel nucleosides and nucleoside dimers containing an L-sugar in at least one of the nucleosides, and their pharmaceutical compositions.

Abstract: The method is provided for contact formation in semiconductor devices. The method involves forming an insulating layer over an active region to be contacted to, forming holes or openings in the insulating layer to expose the active region and forming an aluminium layer over the insulating layer. A source of non-crystalline semiconductor material or damaged crystalline material is located in contact with the aluminium layer such that the non-crystalline or damaged crystalline material is dissolved in the aluminium layer and redeposited on the surface of the semiconductor material to be contacted to. The semiconductor material is deposited by solid phase epitaxial growth and carries with it, aluminium atoms which leave the semiconductor material as heavily doped p-type material.

Abstract: The present invention provides a method of inhibiting the proliferation of cells. The method comprises inhibiting induction or decreasing expression of Egr-1 or decreasing the nuclear accumulation or activity of the Egr-1 gene product. The present invention also provides a method of reducing the incidence of restenosis in a subject. The method comprises administering to the subject an agent which inhibits induction or decreases expression of Egr-1 or decreases the nuclear accumulation or activity of the Egr-1 gene product.

Abstract: The present invention provides a nucleotide sequence encoding carbamoyl phosphate synthetase II of Plasmodium falciparum. Carbamoyl phosphate synthetase II catalyses the first committed and rate-limiting step in the de novo pyrimidine biosynthetic pathway. P. falciparum relies exclusively on pyrimidine synthesis de novo because of its inability to salvage pyrimidines. Mature human red blood cells, however, have no recognized requirement for a pyrimidine nucleotide. Accordingly, this enzyme represents a prime chemotherapeutic locus. The present invention relates to the use of the sequence encoding carbamoyl phosphate synthetase II in the recombinant production of carbamoyl phosphate synthetase II and to antisense molecules, ribozymes and other gene inactivation agents designed from this sequence.

Abstract: The present invention makes use of geometry of grooves formed in a substrate, to allow a dielectric layer to be deposited with some regions of the grooves having a substantially thinner layer deposited than top surfaces of the substrate. These regions of reduced thickness dielectric within the grooves are then prematurely etched by an appropriate chemical, or other, etchant capable of controllably etching away the dielectric layer, with the result that in these regions the silicon surface can be exposed and plated by a metallization while the top surface remains protected by the dielectric material. The remaining dielectric material can optionally be required to act as an anti-reflective coating. The invention is applicable in making buried contact solar cells.

Abstract: The present invention relates to a method of fabricating optical devices and in particular to a method of fabricating integrated opto-electronic devices, and to an opto-electronic device. A plasma enhanced chemical vapor deposition process (PECVD) is used to deposit an optical device integrated in silicon onto an electronic device fabricated in silicon. Relatively low temperatures are utilized and, in order to reduce losses of a waveguide in the optical device in the wavelength range 1.50 to 1.53 .mu.m, the deposition process is carried out in the absence of nitrogen. An optical device is disclosed which comprises an integrated construction incorporating an optical waveguide in silica and a photonic transducer in silicon.

Abstract: An antifouling composition that comprises an effective amount of a furanone of the structure shown and a suitable carrier therefor. In the figure, substituents R.sub.1, R.sub.2 and R.sub.3 are each a hydrogen atom, a hydroxyl group, an alkyl group containing from 1 to 10 carbon atoms, an ether group containing from 1 to 10 carbon atoms, an ester group containing from 1 to 10 carbon atoms or a halogenated alkene containing from 1 to 10 carbon atoms or R.sub.2 and R.sub.3 together may comprise an unsubstituted or a halogenated alkene containing from 1 to 10 carbon atoms and R.sub.4 is a hydrogen or halogen atom, and a suitable carrier therefor.

Abstract: A four quadrant multiplier using multiple input floating-gate MOS transistors is provided. It is based on the square law characteristics of the MOS transistor and can be realised with only four floating gate MOS transistors, two resistors and a current source. The four floating gate transistors are configured with their sources connected in common and biased by a single current source. Output is taken between two common drain connections. Each transistor has three control gates with two being provided for selected ones of the two input signals and one for a biasing signal (optional). Input signals can be connected to the control gates in either a differential or single ended configuration. In one application, a programmable synaptic cell for neural networks employs the multi-input floating-gate MOS four-quadrant analog multiplier. Varying of the neural weight connection strength of each synaptic cell is achieved by two possible methods.

Abstract: The present invention provides a nucleotide sequence encoding carbamoyl phosphate synthetase II of Plasmodium falciparum. Carbamoyl phosphate synthetase II catalyses the first committed and rate-limiting step in the de novo pyrimidine biosynthetic pathway. P. falciparum relies exclusively on pyrimidine synthesis de novo because of its inability to salvage pyrimidines. Mature human red blood cells, however, have no recognised requirement for a pyrimidine nucleotide. Accordingly, this enzyme represents a prime chemotherapeutic locus. The present invention relates to the use of the sequence encoding carbamoyl phosphate synthetase II in the recombinant production of carbamoyl phosphate synthetase II and to antisense molecules, ribozymes and other gene inactivation agents designed from this sequence.

Abstract: A method and apparatus for separation of cells including a semi-permeable substrate to which a ligand is attached to its surface which is adapted to bind a desired cell type. The apparatus comprising a semi-permeable substrate in the form of an array of hollow fibres is provided internally with a ligand reactive to the desired cell type.

Abstract: The present invention relates to electrical conversion between electrical systems, e.g. inversion. An improved power converter is disclosed, which utilizes zero current switched and zero voltage stitched switching networks either side of a link. An operating state in which one network is disconnected from the link (a zero power flow state) results in an increase in efficiency.

Abstract: Conducting plastic electrodes and methods of preparing such electrodes are disclosed. The electrodes comprise a thermo-plastic polymer, an elastomeric polymer, and a conductive filler material.