Abstract: The invention relates to a process for preparing 1-substituted 5- and/or 3-hydroxypyrazoles of the formulae I and II in which R1 is C1-C6-alkyl, C2-C6-alkenyl, C2-C6-alkynyl, C3-C6-cycloalkyl or C1-C4-alkoxy, where these groups may be substituted by halogen, C1-C4-alkoxy, phenoxy, C1-C6-alkoxycarbonyl, C1-C6-alkylthiocarbonyl or by a cyclic ring system having 3-14 ring atoms, which comprises reacting an alkyl 3-alkoxyacrylate of the formula III in which R2, R3 independently of one another are C1-C6-alkyl or C3-C6-cycloalkyl with a hydrazine of the formula IV in which R1 is as defined above a) at a pH of 6-11 to give 5-hydroxypyrazoles of the formula I or b) at a pH of 11-14 to give 3-hydroxypyrazoles of the formula II.

Abstract: Disclosed is a PVC pipe cement composition that comprises a polymeric material of a methyl methacrylate homopolymer or copolymer, a styrene-acrylonitrile polymer, and a rubber grafted with at least a methacrylic acid ester of a C1 to C8 alkanol; and at least about 10% by weight solvent.

Abstract: Genes of purine biosynthesis from Ashbya gossypii are used in microbial riboflavin synthesis.

Abstract: Continuous anionic polymerization and melt-spinning of a polycaprolactam includes forming a reaction mixture by bringing at least two streams of liquid caprolactam respectively containing a polymerization initiator and co-initiator into contact with one another, and then subjecting the reaction mixture to anionic polymerization reaction conditions to obtain a molten polycaprolactam. The molten polycaprolactam is the directly (i.e., without intermediate solidification) transferred to, and extruded through, a fiber-forming orifice of a spinneret to form a fiber thereof. One exemplary system to achieve such continuous anionic polymerization and melt-spinning of polycaprolactam includes a mixer for receiving and mixing at least two streams of liquid caprolactam respectively containing a polymerization initiator and co-initiator, and a reactor and melt-spinning apparatus downstream of the mixer.

Abstract: Use of pyrimidine derivatives of the formula I where the substituents are as defined in the description, and of their physiologically tolerated salts for producing medicaments for the prophylaxis and treatment of cerebral ischemia and strokes.

Abstract: The invention relates to a process for preparing styrene polymers which comprise water as sole blowing agent, by polymerizing styrene in aqueous suspension in the presence of from 0.1 to 15% by weight of a solid substance insoluble in water and in styrene, for example carbon black or graphite.

Abstract: Use of sunscreen combinations comprising as essential constituent, amino-substituted hydroxybenzophenones as photostable UV filters in cosmetic and pharmaceutical preparations.

Abstract: A process for the reaction of an organic compound in the presence of a catalyst comprising, as active metal, ruthenium alone or together with at least one Group Ib, VIIb, or VIIIb metal in an amount of from 0.01 to 30 wt %, based on the total weight of the catalyst, applied to a support, wherein from 10 to 50% of the pore volume of the support comprises macropores having a pore diameter in the range of from 50 nm to 10,000 nm and from 50 to 90% of the pore volume of the support comprises mesopores having a pore diameter in the range of from 2 to 50 nm, the sum of said pore volumes being 100%, and said catalyst as such.

Abstract: A method for screening for potential fungicides identifies biochemical or chemical agents that inhibit the formation of the fungal sterol ergosterol by inhibiting cytochrome P450 reductase or reductase related enzymes or proteins involved in its biosynthesis. Test samples are incubated in two yeast strain cultures, and the extent of growth inhibition is compared between them. One culture is supersensitive to cytochrome P450 reductase inhibitors; the yeast strain typically contains a disrupted or deleted cytochrome P450 reductase gene. The other culture is less sensitive to the compounds, typically exhibiting enhanced permeability such as that observed in erg6 mutants. In preferred embodiments, a known cytochrome P450 reductase related electron-transfer protein inhibitor such as keto-conazole, miconazole, dinaconazole or econazole is employed as a positive control. Preferred embodiments employ solidified media, and test samples are applied to disks or wells.

Abstract: A non-aqueous, stable concentrated single-phase spreading oil (SO) formulation is disclosed. The SO formulation has a compound of formula I as the active ingredient, and at least one plant oil and polar aprotic organic solvent. Optionally, the SO formulation can also have at least one methylated plant oil. The SO formulation is useful as a blasticide in an aquatic environment of rice plants.

Abstract: Method of purifying triethanolamine prepared by reacting aqueous ammonia with ethylene oxide in the liquid phase under pressure and at elevated temperature by removing excess ammonia, water and monoethanolamine from the reaction product, reacting the resulting crude product with ethylene oxide at temperatures of from 110 to 180° C., and then rectifying the mixture in the presence of phosphorous or hypophosphorous acid or compounds thereof.

Abstract: In a process for the preparation of acrolein and/or acrylic acid from propane, the propane is subjected, in a first reaction stage, to a partial oxydehydrogenation with molecular oxygen under homogeneous and/or heterogeneous catalysis to give propene and the product gas mixture formed in the first reaction stage is then used for the preparation of acrolein and/or acrylic acid by gas-phase catalytic propene oxidation.

Abstract: Novel hydroximic acid derivatives I and salts thereof, where X=O, S; Y=O, S; R1=H, C1-C4-alkyl, NH2, C1-C4-alkylamino or di(C1-C4-alkyl)amino; R2=C1-C3-haloalkyl; R3=H, halogen, C1-C4-alkyl; R4=H, halogen; R5=CN, halogen; R6=C1-C6-alkyl, C2-C6-alkenyl, C3-C6-alkynyl or phenyl-C1-C6-alkyl, where the phenyl ring of this group may be unsubstituted or may carry 1-3 substituents; R7=a C1-C6-alkyl, C2-C6-alkenyl, C3-C6-alkynyl or phenyl-C1-C6-alkyl, where these 4 groups may be unsubstituted or may carry 1 to 2 substituents; Use: As herbicides; for the desiccation/defoliation of plants.

Abstract: A process for preparing 4-bromoaniline derivatives of the formula I where: R1 is C1-C6-alkyl, C1-C6-haloalkyl, C1-C6-alkoxy, C1-C6-haloalkoxy, C3-C8-cycloalkyl, halogen R2 is C1-C6-alkyl, C1-C6-alkoxy, C3-C8-cycloalkyl, C2-C6-alkenyl, cyano or a heterocyclic radical is described.

Abstract: Lipids are used as aids in the production of solid drug forms by melt extrusion.

Abstract: A method of distillation for separating a material which is solid at ambient temperature from a lower boiling and lower melting point material, and the apparatus.

Abstract: A process for the separation by distillation of a mixture of 1,4-butanediol and at least one 4-hydroxybutyraldehyde, its cyclic hemiacetal and its cyclic full acetals with at least one further alcohol by carrying out the distillation in the presence of an alkaline compound. The mixture to be separated preferably contains a cyclic full acetal of 4-hydroxybutyraldehyde with a further alcohol which has a lower boiling point than butanediol and also the further alcohol in free form. The process is particularly suitable for the separation by distillation of mixtures formed in the hydrogenation of maleic acid derivatives.

Abstract: A visual effect, such as a granite-look, is produced in a thermoplastic product by directly applying a sufficient amount of at least one color-containing thermoplastic resin system to the surface of an extruded sheet of a thermoplastic resin. The color-containing thermoplastic resin system is applied onto the extruded sheet after it emerges from the die and prior to it entering the rollstack.

Abstract: In a process for the high-pressure polymerization of ethylene in a high-pressure autoclave or in a high-pressure tube reactor having one or more metering points for one or more peroxides, no peroxide or a reduced amount of peroxide is metered in during the time interval in which the pressure is lowered by opening a pressure maintenance valve and the original amount of peroxide per unit time is metered in again as soon as the pressure after closure of the pressure maintenance valve has built up again so that it exceeds 90% of the pressure difference between nominal pressure and lowered pressure.

Abstract: Additives for mineral building materials made of water-soluble or water-dispersible polymers containing a carboxyl group, optionally in latent form, and at least one side chain of formula I: —X—Y—[O—(Alk—O)n—R]k  (I) wherein k is 1, 2, 3 or 4; Y is a C1-C4-alkylene unit, or a single bond if X is a carbonyl group, or when k≠1, can also be  X is  wherein R′ is hydrogen, C1-C20-alkyl, C5-C10-cycloalkyl, C6-C20-aryl, C1-C20-alkanoyl, C7-C21-aroyl, (Alk-O)n—R or -Alk′-O(Alk-O)n—R; Alk is C2-C4-alkylene; Alk′ is C1-C4-alkylene optionally having an OH group; n is a number in the range from 15 to 300; and R is hydrogen, C1-C20-alkyl, C5-C8-cycloalkyl, C6-C20-aryl, C1-C20-alkanoyl or C7-C21-aroyl; are obtained by polymerization of ethylenically unsaturated monomers in the presence of phosphorus-containing compounds and, if appropriate, subsequent polymer-analogous conversion.