Deg ra da tion of natu ral re sources has be come a global prob lem that threat ens the live li hood of mil lions of poor peo ple. Many prom is ing tech nolo gies for natu ral re source man age ment are avail able to ad dress these prob lems, but farm ers and oth ers of ten fail to adopt them. Why is this? Al though many fac tors can be iden ti fied, lack of se cure prop erty rights and col lec...

The technlque of scannlng electrochemical mlcroscopy (SECM) Is descrlbed. I n thls technlque the electrolysls current that flows as an ultramicroelectrode tlp (diameter ca. 10 gm) Immersed In a soiutlon Is moved above a substrate surface is used to characterize processes and structural features of the substrate. Modes of Operation consldered Include collectlon modes, where products electrogener...

R-, !-, γ-, and δ-Tocopherols can be oxidized in dry CH2Cl2 or CH3CN by one electron to form cation radicals that deprotonate to form the neutral phenoxyl radicals, which are then immediately further oxidized by one electron to the phenoxonium cations (an ECE electrochemical mechanism, where E signifies an electron transfer and C represents a chemical step, with the electrochemical mechanism ha...

Camptothecin (CPT) is a cytotoxic quinoline alkaloid endowed with the inhibition of topoisomerase I, an essential enzyme for the normal functioning of DNA. The redox behaviour of CPT was investigated at a glassy carbon electrode using cyclic, differential pulse and square wave voltammetry. It was shown that CPT can undergo reduction in a pH-dependent mechanism. In acid media only one irreversib...

Lithium-oxygen batteries, also known as Lithium-air batteries, could possibly revolutionize energy storage as we know. By letting lithium react with ambient oxygen gas very large theoretical energy densities are possible. However, there are several challenges remaining to be solved, such as finding suitable materials and understanding the reaction, before the lithium-oxygen battery could be com...

Self-assembly of nanostructured materials has been proven a powerful technique in material design and synthesis. By phage display screening, M13 phage was found to strongly bind sulfur particles. Fourier transform infrared and X-ray photoelectron spectroscopy measurements indicated that the strong sulfur-binding ability of M13 phage derives from newly generated S-O and C-S bonds. Using this pha...

Hydrogenases are enzymes of great biotechnological relevance because they catalyse the interconversion of H2, water (protons) and electricity using non-precious metal catalytic active sites. Electrochemical studies into the reactivity of NiFe membrane-bound hydrogenases (MBH) have provided a particularly detailed insight into the reactivity and mechanism of this group of enzymes. Significantly,...

Scanning electrochemical microscopy (SECM) experiments were undertaken to study the EC’mechanism, e.g. where a product of the electrode reaction reacts to regenerate the starting material. Digital simulations of the two dimensional SECM were carried out and the results tested with the known EC’ system of Fe(CN)6 / cysteine for validation. The results were then used in SECM experiments with Ru(p...

Extracellular electron transfer mechanism in Shewanella loihica PV4 biofilms formed at indium tin oxide and graphite electrodes. Journal Article How to cite: Jain, Anand; O Connolly, Jack; Woolley, Richard; Krishnamurthy, Satheesh and Marsili, Enrico (2013). Extracellular electron transfer mechanism in Shewanella loihica PV4 biofilms formed at indium tin oxide and graphite electrodes. Internati...

The electrochemical mineralization mechanism of environmentally persistent perfluorooctanoic acid (PFOA) at a Ce-doped modified porous nanocrystalline PbO2 film anode was investigated using density functional theory (DFT) simulation and further validated experimentally. The potential energy surface was mapped out for all possible reactions during electrochemical mineralization reaction of PFOA....