A characteristic redox potential-time curve of the iron(II)/nitric acid autocatalytic reaction was applied to a time measurement-determination for sub-microM levels of folic acid. The determination range was 7.5 x 10(-7) - 1.5 x 10(-5) M, the detection limit (3 sigma) was 5.9 x 10(-7) M, and the relative standard deviation was 3.6% (n = 5).

The current understanding of dissimilatory metal reduction is based primarily on isolates from the proteobacterial genera Geobacter and Shewanella. However, environments undergoing active Fe(III) reduction often harbor less-well-studied phyla that are equally abundant. In this work, electrochemical techniques were used to analyze respiratory electron transfer by the only known Fe(III)-reducing ...

This paper explores potential channels through which information technology (IT) affects economic development. The channel emphasized here is the reduction of transaction costs through the use of information technology. We discuss the nature of transaction costs, their possible impacts on economic outcomes, and the impacts of IT on transaction costs. We provide a theoretical discussion of how a...

Sediment redox potentials (EH) at stations of different trophic status in the central Adriatic from 2001-2007 were investigated in this paper. For most part of the year at open sea and channel stations EH values were mainly positive (+150 to 0 mV), even to 10 cm sediment depth. Positive EH (absence of sulphate reduction with very low sulphide concentrations) at these stations is probably caused...