Abstract: The use of basic ion exchange resins to adsorb rifamycin B or rifamycin S from dilute solutions containing rifamycin B or rifamycin S is disclosed. The rifamycin B or rifamycin S may be recovered from the resin by desorption with a suitable desorbing solvent system.

Abstract: An imidazoline modified styrene-acrylonitrile polymer composition which is substantially insoluble in aqueous media at about pH 6 or more but swellable or soluble at pH 3 or less is employed as a coating for nutrient or therapeutic substances for administration to ruminants. The substances thus are rendered resistant to attack and breakdown in the rumen yet remain susceptible to release and digestion within the abomasum or small intestine of the animal.

Abstract: Cement compositions having improved strength and enhanced adhesion to siliceous substrates are obtained by admixing Portland cement with a cement additive comprising (1) a styrene-butadiene interpolymeric latex containing up to about 60 parts by weight of interpolymer solids, said latex being present in an amount sufficient to provide from about 5 to about 25 parts by weight of latex polymer solids based on the weight of cement and (2) from about 0.05 to about 3 parts by weight of latex solids of a silane of the formula ZSi(OR').sub.3 wherein Z is a member selected from the group consisting of hydrocarbon groups and substituted hydrocarbon groups in which the substituent is bonded to the silicon atom through at least one carbon atom, and R' is selected from the group consisting of alkyl radicals of from 1 to 3 carbon atoms, --CH.sub.2 CH.sub.2 OR" and --CH.sub.2 CHOH where R" is an aliphatic hydrocarbon radical of 1 to 3 inclusive carbon atoms.

Abstract: Quaternary ammonium salts and sterically unhindered, nucleophilic, tertiary amines are novel cocatalysts which are used in the process of reacting an alkali metal phenate, pyridinate or pyrimidinate with an O,O-dialkylphosphorochloridothioate or O-alkyl phenylphosphonochloridothioate to produce the corresponding phosphorothioates and phenylphosphonothioates. The process is conducted under alkaline conditions in a liquid reaction medium.

Abstract: Disclosed are pyridinecarboxylic acids and derivatives thereof which are useful as intermediates for the preparation of 1H-pyrido(2,3-c or 4,3-c) (1,2,6)thiadiazin-4(3H)-one-2,2-dioxide compounds and derivatives thereof which are useful as herbicides.

Abstract: Disclosed are pyridinecarboxylic acids and derivatives thereof which are useful as intermediates for the preparation of 1H-pyrido(2,3-c or 4,3-c)(1,2,6)thiadiazin-4(3H)-one-2,2-dioxide compounds and derivatives thereof which are useful as herbicides.

Abstract: Disclosed are pyridinecarboxylic acids and derivatives thereof which are useful as intermediates for the preparation of 1H-pyrido(2,3-c or 4,3-c) (1,2,6)thiadiazin-4(3H)-one-2,2-dioxide compounds and derivatives thereof which are useful as herbicides.

Abstract: This invention is directed to cement additives comprising (1) a polymer latex containing up to about 60 parts by weight of latex polymer solids consisting essentially of (A) the polymerized product of (a) a monomer selected from the group consisting of styrene, vinyl toluene and tertiary butyl styrene, (b) an alkyl acrylate or alkyl methacrylate having from 8 to 12 carbon atoms in the alkyl group and (c) arcylamide or methacrylamide, and (B) a butadiene rubber, (2) a nonionic surfactant and (3) a polyorganosiloxane foam depressant; and to portland cement compositions containing these additives, such cement compositions being characterized by having excellent strength and adhesion to cementitious substrates.