Abstract:
The invention relates to a process fop trapping gaseous ruthenium on polyvinyl pyridine, more particularly usable for recovering radioactive ruthenium from irradiated nuclear fuels.This process consists of contacting a gas containing ruthenium in gaseous form with an adsorbent (11b) constituted by a vinyl pyridine polymer or copolymer for fixing the ruthenium to the latter. The gas can be constituted by yapours from a concentrate of fission products containing ruthenium, which has been heated (at 31) in the presence of an oxidizing agent for volatilizing the ruthenium.
Abstract:
The invention relates to thiophenes substituted by an alkoxy group containing at least one fluorine atom.The invention also relates to the polymers derived from these substituted thiophenes and to the electrically conductive polymers containing these polymers.The invention also relates to processes for obtaining these thiophenes, these polymers and these electrically conductive polymers.The invention also relates to the uses of these thiophenes, of these polymers and of these electrically conductive polymers as well as to the devices containing the polymers and the electrically conductive polymers.
Abstract:
The invention relates to a process for the separation of at least one element such as Nb, Sb, Ce+Pr, actinides and elements from groups VIIb and VIII of the Periodic Classification of Elements from aqueous solutions resulting from the reprocessing of spent nuclear fuels.This process consists of contacting said aqueous solution with a solid resin based on a vinyl pyridine polymer or copolymer and separating from said solution the resin used for fixing said element or elements.The resin is in particular a poly(vinyl-4-pyridine) powder in crosslinked from and the separated elements are e.g. ruthenium, rhodium, palladium, technetium, manganese, cobalt, iron, nickel, cerium and praseodymium.
Abstract:
The invention relates to the use of thioether ligands in accordance with the formula: ##STR1## in which R.sup.1 and R.sup.2, which can be the same or different, represent alkyl radicals, R.sup.3 is an alkyl radical and A represents a divalent radical chosen from among the radicals of formula:--(CH.sub.2).sub.m ----(CH.sub.2).sub.n --X--(CH.sub.2).sub.p -- ##STR2## in which m is equal to 0 or is an integer from 1 to 6, n and p are integers between 1 and 6 and X represents O or S, for recovering the palladium present in a nitric aqueous solution (A.sub.0) for dissolving irradiated nuclear fuel elements.For example, it is possible to use the ligand of formula (I) with A representing CH.sub.2 --S--CH.sub.2 and R.sup.1 and R.sup.2 representing C.sub.10 H.sub.21.
Abstract:
There is provided a 3-substituted polypyrrole represented by the general formula (I) ##STR1## wherein R is an alkyl group having 1 to 5 carbon atoms, m is an integer of from 1 to 20, and n is an integer of 2 or more.
Abstract:
The invention relates to a product for the treatment of cereal crops against the effect of Ophiobolus graminis which product comprises a culture of an abnormal homogeneous strain of Ophiobolus graminis carried on a divided support medium.
Abstract:
The invention relates to a gaseous composition containing an effective amount of argon gas for use, by inhalation, in preventing or treating a deficiency or failure of at least one peripheral organ in a patient. Preferably, it contains between 15 and 80% by volume of argon, and oxygen, preferably at least 21% by volume of oxygen. The organ deficiency or failure thus treated is transient, preferably from less than one hour to a plurality of days or weeks, or definitive. The organ concerned may be the liver, the kidneys or the lungs.
Abstract:
This invention relates to novel polyether ionophores, formulations comprising same, and to methods of making and using these compounds and formulations for the treatment and/or prevention of parasitic infection in animals and humans. These compounds exhibit improved safety profiles and/or efficacies as compared to parent compounds.
Abstract:
The invention relates to the use of argon gas for producing all or part of an inhalable medicinal product intended to prevent or treat a neurointoxication in humans. The medicinal product contains argon in an effective proportion and acts on at least one brain receptor in order to regulate the functioning of dopamine-, glutamate-, serotonin-, acetylcholine-, taurine-, GABA- and/or noradrenalin-mediated neurotransmission systems. Preferably, the proportion by volume of argon in the gaseous medicinal product is between 15 and 80%. The neurointoxication is chosen from excitotoxicities engendering a state of addiction, acute cerebral accidents, neurodegenerative diseases, and psychiatric or neurological pathologies, in particular anxiety conditions, psychotic conditions, in particular schizophrenia, and epilepsy in its various forms.
Abstract:
The invention concerns the use of a gaseous mixture containing gas xenon and gas nitrous oxide, and advantageously oxygen, for making all or part of an inhalable medicine for preventing or treating neurointoxication in a human. The xenon/nitrous oxide mixture of the invention acts on one or more cerebral receptors to reduce the release and/or the effects of dopamine, glutamate, serotonin, taurin, GABA, noradrenaline and/or any other neurotransmitter. The proportion by volume of xenon of the mixture ranges between 5 and 45%, and the proportion by volume of nitrous oxide ranges between 10 and 50%, the balance is preferably oxygen.