Abstract: A process is described for preparing alkoxycarbonylaminotriazines by reacting di- or triaminotriazines with dimethyl carbonate in the presence of an alcohol and of an alkali metal or alkaline earth metal methoxide base.

Abstract: A process is described for preparing alkoxycarbonylaminotriazines by reacting di- or triaminotriazines with dimethyl carbonate in the presence of an alcohol and of an alkali metal or alkaline earth metal methoxide base.

Abstract: Improved amine-terminated polybutadienes (ATPBs) having one or two terminal groups of the formula —CHRNH2 wherein R is C1-C20 alkyl, are prepared by aminating a secondary hydroxyl-terminated polybutadiene having no ether groups. The ATPBs may be hydrogenated or partially hydrogenated, either prior to or after the animation, to saturate or partially saturate the polymers. Preferred ATPBs are of the formula H2NCHR-(polybutadiene)-CHRNH2 wherein R is C1-C20 alkyl. Polyureas, polyurethanes, crosslinked epoxies, polyamides, and other derivatives with improved properties can be prepared from the ATPBs. The resultant derivatives are useful in liquid binders for braking systems, electric potting compositions, coatings, adhesives, sealants, and water proofing membranes, for example.

Abstract: The invention concerns a novel construct for expressing a gene coding for a recombinant protein of interest placed under the control of the Ptrp tryptophan operon promoter in a procaryotic host cell. The invention is characterised in that the construct comprises a nucleic sequence capable of inactivating the gene coding for a TnaA tryptophanase when said nucleic sequence is introduced in said host cell. The invention also concerns vectors containing said construct and host cells transformed by said vectors. The invention further concerns methods for producing said recombinant proteins using said novel constructs.

Abstract: A process is described for preparing alkoxycarbonylaminotriazines by reacting di- or triaminotriazines with dimethyl carbonate in the presence of an alcohol and of an alkali metal or alkaline earth metal methoxide base.

Abstract: The invention concerns pharmaceutical composition comprising in a pharmaceutically acceptable medium at least a peptide derived from a periplasmic domain of an enterobacterium Omp protein or a nucleic construct coding for said peptide, as well as the use of such a peptide or such a nucleic construct for the preparation of a vaccine for prophylactic or therapeutic treatment of viral, bacterial, parasitic or fungal infections, or for preparing a vaccine designed for the prophylactic or therapeutic treatment of cancers.

Abstract: Improved amine-terminated polybutadienes (ATPBs) having one or two terminal groups of the formula —CHRNH2 wherein R is C1-C20 alkyl, are prepared by aminating a secondary hydroxyl-terminated polybutadiene having no ether groups. The ATPBs may be hydrogenated or partially hydrogenated, either prior to or after the amination, to saturate or partially saturate the polymers. Preferred ATPBs are of the formula H2NCHR-(polybutadiene)-CHRNH2 wherein R is C1-C20 alkyl.

Abstract: The invention relates in particular to a process for modifying the properties of a hydroxylated surface of a three-dimensional substrate containing exposed zones and recessed zones, according to which a compound, such as a silane containing (a) reactive group(s), is selectively dry-transferred onto the exposed zones of said surface using a a flat stamping pad impregnated with said compound. The substrate may be made of glass and the compound may be a thiol or an alkyl- or aryl-tri(chloro or alkoxy) silane, inter alia. Use, in particular, for the production of microwell plates for biological cultures and printing plates.

Abstract: A blank consisting of a spirally wound fiber for use in the manufacture of a fiber reinforced article of composite material is made by winding the fiber onto a helical track on the surface of a frusto-conical spindle, covering the wound fiber with a thermoplastic binder which sets to form a frusto-conical shell encasing the fiber, removing the shell from the spindle and placing the shell with its base on a plate, and heating the shell starting from its base so as to soften it and cause it to progressively collapse onto the plate to form a disc comprising a spirally wound fiber. If necessary the collapse of the shell may be assisted by pressing on the shell in a direction towards the plate.

Abstract: A novel human immunodeficiency virus type 1 (HIV-1) cytotoxic T-lymphocyte (CTL) epitope has been identified in the gag coding region. This epitope corresponds to amino acids 255-269 of Gag and has the following sequence: NH.sub.2 -asn-pro-pro-ile-pro-val-gly-glu-ile-tyr-lys-arg-trp-ile-ile-COOH. This peptide interacts specifically with human leukocyte antigen-B8 (HLA-B8). This peptide is useful for the identification HIV-1 gag-specific CTL.

Abstract: The present invention provides peptidal fragments of human immunodeficiency virus (HIV) which interact specifically with a particular human leucocyte antigen (HLA) class I molecule to stimulate cytotoxic T lymphocyte immunity.

Abstract: Peptides are described which have the amino acid sequence of a fragment of HIV (human immunodeficiency virus) which interacts specifically with a particular human leucocyte antigen (HLA) class I molecule, to stimulate cytotoxic T lymphocyte immunity. Such fragments can be used in a potential vaccine against AIDS (acquired immune deficiency syndrome), and for diagnostic and therapeutic purposes.

Abstract: The generator comprises an envelope and two mirrors defining a resonant cavity, in which is maintained a monolithic wave-guide with a capillary. The capillary is formed in a thinned portion of the guide. Two electrodes extend over the thinned portion of the guide. The capillary is circular in cross section, this being obtained by drilling or extrusion of a cylindrical bar made of dielectric material. The circulation of the laser gas is excellent and the laser plasma uniform. The generator has multiple applications, for example in the medical field.

Abstract: An improved method and apparatus for producing ferro-alloys from ore in which an ore is first mixed with a solid reducing agent, preheated and pre-reduced in a rotary kiln, and smelted in an electric furnace, in which the pre-reduced ore is heated by a burner provided in the electric furnace where it is also reoxidized. The ore is also heated in the rotary kiln by recycled gas.

Abstract: This invention relates to new composite materials having, along a director plane, noteworthy mechanical properties, wherein they comprise a resistant material, in flat form disposed parallel to the director plane and flakes or bands or substantially flat form, constituted of or comprising a material with high modulus, said flakes or bands also being disposed parallel to the director plane.