Photosynthetically generated O(2) was measured from single algal colonies in a He atmosphere, using an enhanced Hersch galvanic cell. The enhancement consisted of using ultrapure potassium hydroxide as the electrolyte and ultrapure lead as the anode. The galvanic cell was placed in a regulated helium-flow system containing a reaction cuvette with the colonies and an electrolysis cell for calibr...

Granular activated carbon (GAC) was used to remove bromide (Br⁻) and bromate (BrO(3)(-)) from drinking water in both bench- and pilot-scale experiments. The present study aims to minimize BrO(3)(-) formation and eliminate BrO(3)(-) generated during the ozonation of drinking water, particularly in packaged drinking water. Results show that the Br⁻ and BrO(3)(-) levels in GAC-treated water decrea...

The aim of the present study was to develop a simple, rapid and inexpensive protocol of ultrapure bacterial genomic DNA extraction suitable for use in molecular methodology. This communication describes a protocol which uses superparamagnetic bare nanoparticles for isolation and purification of genomic DNA from overnight culture of Escherichia coli XL1 Blue strain. A comparison is also made wit...

Weakly charged elements, or elements that are not well dissociated in water, are not removed ef®ciently by conventional water-puri®cation technologies. In the production of high-purity water, silica and boron are generally the ®rst ions to breakthrough into puri®ed water when the ion-exchange resin approaches depletion. In this study, the behavior of these two elements was studied through vario...

Methane production occurs during hydrogen gas generation in microbial electrolysis cells (MECs), particularly when single chamber systems are used which do not keep gases, generated at the cathode, separate from the anode. Few studies have examined the factors contributing to methane gas generation or the main pathway in MECs. It is shown here that methane generation is primarily associated wit...