Electrodialysis, an electrochemical membrane technique, was found to prolong and enhance the production of biohydrogen and purified organic acids via the anaerobic fermentation of glucose by Escherichia coli. Through the design of a model electrodialysis medium using cationic buffer, pH was precisely controlled electrokinetically, i.e. by the regulated extraction of acidic products with coulomb...

A novel density barrier material, Phase Lock Gel, has been formulated and optimized for use in enhancing the separation between aqueous and organic phases during organic extraction/ centrifugation of nucleic acids. Phase Lock Gel is inert, stable to heating, compatible with most enzymatic reactions of nucleic acids without sacrificing subsequent downstream applications, and can be easily and co...

Amounts of iron released from iron pots vary from meal to meal. The effects of salt, pH, and organic acids as iron chelators were studied. Maize (corn) porridges were prepared in a cast iron pot from maize flour and 12 aqueous solutions with different pH (3.7 or 7.2), salt contents (0% or 0.5% NaCl), and organic acids (1% lactate, 1% citrate, or none). Salt had no effect, but acidic pH or organ...

The presence of Eriophorum angustifolium in mine tailings of pyrite maintains a neutral pH, despite weathering, thus lowering the release of toxic elements into acid mine drainage water. We investigated if the presence of slightly elevated levels of free toxic elements triggers the plant rhizosphere to change the pH towards neutral by increasing organic acid content. Plants were treated with a ...

Volatile organic acids are byproducts of fermentative metabolism, for example, anaerobic digestion of lignocellulosic biomass or organic wastes, and are often times undesired inhibiting cell growth and reducing directed formation of the desired products. Here, we devised a general framework for upgrading these volatile organic acids to high-value esters that can be used as flavors, fragrances, ...

Background: Leaves of 15 plant species were collected from the catchment areas of the river Beas, Punjab, India, and analyzed for organic acids of tricarboxylic acid cycle, viz., citric acid (CA), succinic acid (SA), fumaric acid (FmA), and malic acid (MA). Methods: Gas chromatography-mass spectrometry (GC-MS) was used to determine the content of organic acids in the leaves of plant species. Tw...

Concentrations of organic acids ranging up to several thousand parts per million have previously been found in oil-field waters. These acids are of interest because of their potential to enhance porosity by the dissolution of carbonates and aluminosilicates. They are believed to be generated from organic geopolymers (kerogen) in the late-diagenetic-early-catagenetic stage of thermal maturation....

BACKGROUND AND AIMS High Al resistance of Rumex obtusifolius together with its ability to accumulate Al has never been studied in weakly acidic conditions (pH > 5.8) and is not sufficiently described in real soil conditions. The potential elucidation of the role of organic acids in plant can explain the Al tolerance mechanism. METHODS We established a pot experiment with R. obtusifolius plant...