In the title hydrated mol-ecular salt, C(4)H(14)N(2)O(2+)·C(2)O(4) (2-)·H(2)O, the oxalate dianion is almost planar (r.m.s. deviation = 0.020 Å). In the crystal, the components are linked by N-H⋯O(water), N-H⋯O(oxalate) O-H(ammonium)⋯O(oxalate), O-H(water)⋯O(oxalate) and O-H(water)⋯O(ammonium) hydrogen bonds, thereby forming a complex three-dimensional packing motif.

Oxalate oxidase catalyzes the conversion of oxalic acid and molecular oxygen to carbon dioxide and hydrogen peroxide. Oxalate-degrading enzymes are of interest for various applications including clinical analysis of the levels of oxalic acid in blood and urine and control of oxalic acid in industrial processes, such as pulp and paper manufacture. In these applications, the presence of oxyanions...

Formation of thiazolidine-2,4-dicarboxylic acid, the L-cysteine-glyoxylate adduct, is the putative mechanism by which L-cysteine reduces hepatic oxalate production from glycollate [Bais, Rofe and Conyers (1991) J. Urol. 145, 1302-1305]. This was investigated in isolated rat hepatocytes by the simultaneous measurement of both adduct and oxalate formation. Different diastereoisomeric ratios of ci...

1. Freshly voided urine from healthy subjects was pooled and ultrafiltered (10,000 daltons). The ultrafiltrable and the macromolecular portions were preincubated with calcium oxalate, uric acid and sodium urate crystals and the effects on the inhibitory activity of calcium oxalate crystal growth assessed by monitoring the disappearance of [14C]oxalate from the solution. 2. The inhibitory activi...

Thirty-two commercially available teas consisting of green, oolong and black teas were bought from supermarkets in Christchurch, New Zealand in June 2001. Fifteen herbal teas were also purchased at the same time. The soluble oxalate content of the infusate made from each of the teas was determined using high pressure liquid chromatography. The mean soluble oxalate contents of black tea in tea b...

Oxalate synthesis in human hepatocytes is not well defined despite the clinical significance of its overproduction in diseases such as the primary hyperoxalurias. To further define these steps, the metabolism to oxalate of the oxalate precursors glycolate and glyoxylate and the possible pathways involved were examined in HepG2 cells. These cells were found to contain oxalate, glyoxylate, and gl...

The molecular and crystal structures of solvent-free potassium, rubidium, and cesium oxalates have been determined ab initio from high-resolution synchrotron and X-ray laboratory powder patterns. In the case of potassium oxalate K(2)C(2)O(4) (a = 10.91176(7) A, b = 6.11592(4) A, c = 3.44003(2) A, orthorhombic, Pbam, Z = 2), the oxalate anion is planar, whereas in cesium oxalate Cs(2)C(2)O(4) (a...

Background & Aim: Punica granatum L. (pomegranate) is a widely used plant that has high nutritional value .This study evaluated prevention effect of hydro alcoholic extract of Punica granatum flower and leaves ethylene glycol-induced Nephrolithiasis in Wistar rats. Experimental: 20 male Wistar rats were randomly divided into 4 equal groups. G...

Urolithiasis is a frequent urological condition and oxalate plays an important role in kidney stone formation. Since hyperoxaluria seems to be one of the main risk factors for developing recurrent kidney stones and progressive nephrocalcinosis, many researches are focused on lowering the urinary oxalate. For now, treatment of hyperoxaluria consists of dietary oxalate restrictions and/or therape...