Abstract: The present invention relates to a method for supplying bioavailable methionine to a cow which comprises supplying to the cow an ester of methionine or methionine amide and/or an ester of the hydroxy analogue of methionine or a salt thereof.

Abstract: A process for the production of methionine which comprises (a) hydrolyzing the methionine amide in the presence of a catalyst comprising titanium to produce ammonium methioninate, said catalyst having a porosity of from 5 to 1000 nm, a total pore volume of from 0.2 to 0.55 cm3/g and a surface area of from 30 to 150 m2/g, and (b) a second step of recuperating methionine from the ammonium methioninate salt by removing ammonia. Also claimed is an industrial process for the production of methionine incorporating the aforementioned hydrolysis.

Abstract: A process, for the preparation of an ester of 2-hydroxy-4-methylthiobutyric acid which is substantially in the monomeric form, which process, being capable of industrial application and which comprises reacting 2-hydroxy-4-methylthiobutyric acid with an alcohol in the presence of water and an acid catalyst at a temperature of from 30 to 150° C. wherein the acid is the direct product of the hydrolysis of 2-hydroxy-4-methylthiobutyronitrile.

Abstract: The present invention relates to a method for supplying bioavailable methionine to a cow which comprises supplying to the cow an ester of methionine or methionine amide and/or an ester of the hydroxy analogue of methionine or a salt thereof.

Abstract: The present invention relates to a method for supplying bioavailable methionine to a cow which comprises supplying to the cow an ester of methionine or methionine amide and/or an ester of the hydroxy analogue of methionine or a salt thereof.

Abstract: Toluene diisocyanate (TDI) is separated and recovered from the residues of the production thereof, e.g., from the tars of phosgenation of an aromatic diamine, by extracting such residues with an extractant which comprises an inert gas, e.g., CO.sub.2, in either the liquid or supercritical state, optionally in the presence of a coextractant diluent, for example an ester, aromatic hydrocarbon or chlorinated aromatic hydrocarbon, or chlorinated aliphatic hydrocarbon.

Abstract: 1. Process for the manufacture of N-substituted 1-carbamoyl-3-(3,5-dichlorophenyl)-hydantoins of the formula: ##STR1## in which R.sub.1 =alkyl (C.sub.1 -C.sub.4) or phenyl and R.sub.2 =H or alkyl (C.sub.1 -C.sub.4).2. This process comprises two steps:a. reacting phosgene with 3-(3,5-dichlorophenyl)-hydantoin in an inert organic solvent medium, in the presence of an acid acceptor, in order to form 1-chlorocarbonyl-3-(3,5-dichlorophenyl)-hydantoin, andb. reacting the chlorocarbonyl formed with an amine HNR.sub.1 R.sub.2 in an inert organic solvent, in the presence of an acid acceptor.3. This process makes it possible to obtain the products I, which can be used as agricultural fungicides, with good yields.

Abstract: Process for the preparation of malathion by reacting O,O-dimethyl-dithiophosphoric acid with ethyl maleate in the presence of a solvent which forms a heterogeneous azeotrope with the O,O-dimethyl-dithiophosphoric acid.

Abstract: New oxathiino- and dithiino-aminoacetic acids of the formula: ##STR1## in which A represents oxygen or sulphur, together with their racemic forms, their optically active forms and mixtures thereof, their reactive derivatives and their acid addition salts, are valuable intermediates for the preparation of therapeutically active derivatives, in particular cephalosporin derivatives of the formula: ##STR2## where R is hydrogen or acetoxy.

Abstract: New cephalosporin derivatives of the general formula: ##STR1## in which R represents a straight or branched chain C.sub.1-4 alkyl radical, or a phenyl (straight or branched chain C.sub.1-4 alkyl) radical, n is 0, 1 or 2, and either R.sub.1 is a pyridinio ion and R.sub.2 is a carboxylato ion, or R.sub.1 represents a hydrogen atom, or an acetoxy, (5-methyl-1,3,4-thiadiazol-2-yl)-thio or (1-methyl-1,2,3,4-tetrazol-5-yl)-thio radical and R.sub.2 represents a carboxy radical or a radical of the formula; ##STR2## in which the radical: ##STR3## is a radical which can be removed easily by enzymatic means and in which R.sub.3 represents a hydrogen atom or a straight or branched chain C.sub.1-4 alkyl radical, a phenyl radical or a phenyl (C.sub.1-2 alkyl) radical and R.sub.4 represents a straight or branched chain C.sub.1-4 alkyl radical, a straight or branched chain C.sub.1-4 alkoxy radical, a cyclohexyl radical, a phenyl radical or a phenyl (C.sub.

Abstract: New cephalosporin derivatives of the formula: ##STR1## in which either (a) R.sub.1 is hydrogen, acetoxy, azido or heterocyclylthio or heterocyclylcarbonylthio which is (1,3,4-thiadiazol-2-yl)-thio which is unsubstituted or substituted by straight or branched chain C.sub.1-4 alkyl or alkoxy, straight or branched chain C.sub.1-4 alkylthio, straight or branched chain C.sub.1-4 alkylsulphonyl, amino or acetylamino; (1,2,3,4-tetrazol-5-yl)-thio which is unsubstituted or substituted in the 1-position by straight or branched chain C.sub.1-4 alkyl, hydroxy straight or branched chain C.sub.1-4 alkyl, phenyl or hydroxyphenyl, or in the 2-position by straight or branched chain C.sub.1-4 alkyl or hydroxy straight or branched chain C.sub.1-4 alkyl; (1,2,4-triazol-3-yl)-thio, (4-methyl-1,3-thiazol-2-yl)-thio, (3-methyl-1,2,4-thiadiazol-5-yl)-thio or (1,2,3-thiadiazol-4-yl)-carbonylthio, and R.sub.

Abstract: New cephalosporin compounds of the formula: ##STR1## in which A is oxygen or sulphur, R.sub.1 is hydrogen or acetoxy and R.sub.2 is carboxy or a radical of the formula: ##STR2## in which the radical ##STR3## is a radical which can be easily removed enzymatically, and in which R.sub.3 is hydrogen or straight or branched chain C.sub.1-4 alkyl and R.sub.4 is straight or branched chain C.sub.1-4, alkyl or cyclohexyl, together with its diastereoisomeric forms and mixtures thereof, its acid addition salts and, where appropriate, its pharmaceutically acceptable non-toxic metal salts and addition salts with nitrogen-containing bases other than ammonia, exhibit valuable anti-bacterial properties, in particular against Gram-positive and Gram-negative bacteria.

Abstract: New cephalosporin derivatives of the formula: ##STR1## wherein one of A and A.sub.1 represents oxygen or sulphur and the other represents sulphur, R.sub.1 represents hydrogen, acetoxy, (5-methyl-1,3,4-thiadiazol-2-yl)thio or (1-methyl-1,2,3,4-tetrazol-5-yl)thio and R.sub.2 represents carboxy, or R.sub.1 represents a pyridinio radical and R.sub.2 represents the carboxylate ion, are therapeutically useful compounds possessing antibacterial properties.