Epoxy resins are hydrolyzed in the absence of substantial quantities of an organic solvent and in the presence of oxalic acid and a phosphonium compound.

Photographic assemblages, elements, receiving elements and cover sheets are described employing a neutralizing layer comprising about 75 to about 150 meq. of acid/m.sup.2 of element for neutralizing an alkaline processing composition. The neutralizing layer, timing layer or layer adjacent thereto also contains about 1 to about 10 meq./m.sup.2 of oxalic acid, or an acid salt thereof, to minimize sensitometric changes that occur with keeping.

A photosensitive diazo composition for a pre-sensitized lithographic plate which exhibits an extended shelf life as well as improved printing performance, the composition comprising (a) a diazonium compound, (b) an organic high molecular weight binder, and (c) from about 0.1 to about 5% by weight of oxalic acid or a salt thereof.

A silver pickling method employing aqueous oxalic acid solutions that removes tightly adherent scale at room temperature, as well as elevated temperatures, that does not tend to plate contaminants onto silver articles due to the accumulation of copper ions in a pickle solution, and that does not aggressively attack solder joints is provided. The silver pickling method comprises the steps of contacting the surface scale of a silver article, such as jewelry, with a solution of oxalic acid and wate...

Mixtures of oxalic, meso tartaric, glyoxylic and erythronic acids derived particularly from the oxidation of cellulose derivatives are separated from aqueous solutions in which they are contained and from each other by stepwise precipitation with calcium ion at controlled pH. The oxalic acid is precipitated as calcium oxalate at a pH of 0.9 to 2.0; the tartaric acid as calcium meso tartrate at a pH of 2.8 to 4.4; and the glyoxylic acid, as calcium glyoxylate at a pH of 4.5 to 5.4. After each pre...

A method for enhancing the performance characteristics of a battery through the use of the electrolyte composition comprised of a non-aqueous solvent, and a salt mixture. The salt mixture includes an alkali metal electrolyte salt and an additive salt having an anion of a mixed anhydride of oxalic acid and boric acid. Specific additive salts include lithium bis(oxalato) borate and lithium oxalyldifluoroborate. Particular electrolyte salts comprise LiPF6 and LiBF4. The additive salt is present in ...

The invention relates to the novel use of a sequence coding for a protein capable of degrading oxalic acid to select plant cells which have integrated a gene of interest, and a novel process for selecting, on oxalic acid, cells, calluses or plants transformed by this recombinant DNA.

There is disclosed a process for the photochemical and thermal stabilisation of polyamide fibre material as claimed in claim 1. The fibre materials treated by the inventive process are distinguished by good fibre affinity and enhanced photochemical and thermal stability.

This invention describes the way to prepare high purity Bi-based superconducting powders with the zero resistance temperature at 110K. The technique employs the dissolution of corresponding metal nitrates in deionized water, plus oxalic acid to chelate the metal cations. The amount of oxalic acid equals to about half of the total nitrate anion in molar ratio. After pH adjustment and gelation, optimal calcination results in 110K superconducting powders in high purity.

Stable, lyophilized diagnostic compositions are disclosed effective in determining glutamic oxalic transaminase (GOT) and glutamic pyruvic transaminase (GPT) comprising malate dehydrogenase (for GOT) or lactate dehydrogenase (for GPT), a pyridine nucleotide and a buffer having a sodium content of less than about 600 meq./1. capable of regulating the pH of the composition in reconstituted form. Also disclosed are the aqueous reconstituted products, the method of determining the activity of GOT an...