The present invention relates, in general, to an enzyme that degrades oxalic acid. In particular, the invention relates to the enzyme oxalate decarboxylase and to a DNA sequence encoding same. The invention further relates to a recombinant molecule comprising the oxalate decarboxylase encoding sequence and to a host cell transformed therewith. In addition, the invention relates to a method of protecting a plant from the deleterious effects of oxalic acid and to a method of reducing the oxalic ac...

In one embodiment this invention provides smoking compositions which contain a novel oxalate ester flavorantrelease additive. Under cigarette smoking conditions, a combustible filler additive such as methyl 4-oxo-.beta.-ionyl oxalate pyrolyzes and releases megastigma-5,7,9-trien-4-one as a natural flavorant component of the cigarette smoke. ##STR1##

An oxalate oxidase can be extracted from the stems of beet by homogenizing the beet, filtering, centrifuging the filtrate, precipitating the oxalate oxidase containing fraction with acetone, dissolving the precipitate in taurodeoxycholic acid, dialyzing the solution and column chromatography. Unlike prior art oxalate oxidase compositions, the instant composition is relatively insensitive to sodium chloride and is well adapted to rapid and inexpensive oxalate assay in body fluids. The composition...

The subject invention pertains to a novel assay device for detecting oxalate in a sample. The assay device comprises enzyme and dye compositions immobilized on a solid carrier matrix. The subject invention can also be used to measure the concentration of oxalate in a sample. The subject invention further pertains to a novel oxalate oxidase composition and methods of preparing the subject enzyme composition. The oxalate oxidase composition can be used in the assay device of the subject invention.

Novel, high light capacity chemiluminescent systems are disclosed. The high capacity is produced by adding a small amount of a polymer selected from the class consisting of: (1) homopolymers and copolymers of poly(alkylene oxides); (2) homopolymers and copolymers of poly(vinyl alkyl esters) and poly(vinyl alkyl ethers) with the optional inclusion of minor amounts of alkylenes and styrenes in said copolymers; (3) 1:1 alternating copolymers of maleic anhydride with alkylenes and styrenes; (4) cell...

The present invention relates to a process for producing a diaryl oxalate, characterized in that an alkylaryl oxalate is subjected to a disproportionation reaction in the presence of a disproportionation catalyst, thereby to produce a diaryl oxalate while removing a by-product comprising a dialkyl oxalate. The production process of the present invention is advantageous in that the kinds of the by-products are fewer than that in conventional production process for diaryl oxalate, and thus can be ...

A method for inhibiting the precipitation of sodium oxalate crystals in a Bayer process liquor. The method comprises the step of adding to the Bayer process liquor, after red mud separation and immediately prior to crystallization of alumina trihydrate, or during crystallization of alumina trihydrate, or during classification of alumina trihydrate, an effective amount of a cationic, surface active, alkylammonium salt compound.

A process for producing silver oxalate, which comprises reacting (a) one member selected from the group consisting of oxalic acid and oxalic acid salts as one reactant, with (b) a silver salt as the other reactant, at a pH of not more than 5 in an aqueous medium thereby to precipitate silver oxalate.

A ferrous salt is reacted with a soluble oxalate to yield ferrous oxalate which is subsequently slurried with a copper salt to produce copper oxalate. This improved process for manufacturing copper oxalate yields a copper oxalate which is easily separated by filtration in substantially pure form; it is readily washable and dries as a very fine powder that requires no grinding.

A poly(methylene oxalate) polymer [poly(oxy(1,2-dioxo-1,2-ethanediyl)oxymethylene)], a bis(tetrabutylammonium)oxalate salt, methods of synthesis thereof and methods of use. Poly(methylene oxalate) is insoluble in all common organic solvents, does not melt and is resistant to fire. Applications are as a light-weight material for use at high temperatures, e.g. as a structural material in aircraft and space vehicles, as a binder for brake systems, and as an insulator for microelectronic components.