Observations are reported on five cases of suicide or attempted suicide by poisoning with oxalic acid or ethylene glycol. Elevated oxalic acid levels were observed in the plasma, stomach contents, and a number of tissues. Raised oxalic acid levels in plasma were associated with reduced total and ultrafilterable calcium levels. It is suggested that the reduction in plasma total calcium level is ...

Oxalic acid produced by Aspergillus niger under submerged conditions in this work. Optimization done with different sources of carbon, nitrogen, minerals and at different pH then biomass production done of Aspergillus niger under submerged conditions for 7 days at room temperature. Further supernatant taken for titration and mycelium for oxaloacetate acetylhydrolase determination by SDS-PAGE. K...

Oxalic acid formation by fungi has received the attention of several investigators since de Bary2 observed that the mycelium of Sclerotinia sclerotiorum became incrusted with an oxalate in its older stages. The most elaborate study of the problem was made byWehmer.3 His results were published in a series of twent,y-three papers. Tabulated data showing oxalic acid production under various condit...

introduction: fruits and vegetables have special importance as a very important part of the human food supply. and from the beginnings of life, man has used these products to supply a part of his food. nowadays, horticultural products are widely used in the diet. cherry is one of the deciduous trees in the temperate regions, which is potassium rich. use of oxalic acid significantly reduces fros...

1THE ACCURATE MEASUREMENT of oxalate concentration in urine presents considerable difficulties. The methods available in the literature are based upon either the direct formation of calcium oxalate precipitate and subsequent oxidimetric titration (1-3) or upon a preliminary ether extraction followed by a titrimetric procedure (4, .5). In a more elaborate method, the extraction with ether is com...

Electrochemical oxidation of oxalic acid has been investigated at bare, highly boron-doped diamond electrodes. Cyclic voltammetry and flow injection analysis with amperometric detection were used to study the electrochemical reaction. Hydrogen-terminated diamonds exhibited well-defined peaks of oxalic acid oxidation in a wide pH range. A good linear response was observed for a concentration ran...

Efficient ligninolytic systems of wood-degrading fungi include not only oxidizing enzymes, but also low-molecular-weight effectors. The ability of Bjerkandera fumosa to secrete oxalic acid and versatile peroxidase (VP) in nitrogen-rich and nitrogen-limited media was studied. Higher activity of VP was determined in the nitrogen-limited media but greater concentration of oxalic acid was observed ...

Vegetation at mining sites can produce increased heavy metal leaching by the organic acids and protons originating from root secretion and litter degradation. Batch experiments were conducted to investigate the effects of organic acids and pH on the extraction of Pb, Cd, Zn and Cu from an alkaline mine soil (sampled from a mining site of Chenzhou City, Hunan Province) and an acid mine soil (sam...

METttOXYFLURANE IS A general anaesthetic that has been implicated in the production of postoperative renal dysfunction. 1-6 The precise mechanism is unknown, but the finding of many oxalate crystals in the renal tubules, 5,6 and large amounts of oxalic acid in the urine of patients who develop renal failure after methoxyflurane anaesthesia s has suggested the possibility that oxalic acid may be...

SYNOPSIS Observations are reported on five cases of suicide or attempted suicide by poisoning with oxalic acid or ethylene glycol. Elevated oxalic acid levels were observed in the plasma, stomach contents, and a number of tissues. Raised oxalic acid levels in plasma were associated with reduced total and ultrafilterable calcium levels. It is suggested that the reduction in plasma total calcium ...