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SUMMARY:Superoxide anion production in diatoms and its potential role in b
 io-photovoltaic devices - Anuphon Laohavisit\, Plant Metabolism
DTSTART:20120316T130000Z
DTEND:20120316T133000Z
UID:TALK35548@talks.cam.ac.uk
CONTACT:24938
DESCRIPTION:With an increasing energy demand in the world\, other potentia
 l sources of energy are needed to be secured and developed. Solar technolo
 gies are attractive\, though to harvest this energy cheaply and efficientl
 y is technically challenging. Bio-photovoltaic (BPV) devices have been dev
 eloped as a way of harvesting the solar energy. These devices use photosyn
 thetic material to generate electron that can generate power output. Whils
 t it is believed that the source of electron is from chloroplasts (Bombell
 i et al.\, 2011\; Energy Environ. Sci.\, 2011\, 4\, 4690)\, the mechanism 
 on how electrons leave the cell is largely unknown.\n\nIt is hypothesised 
 that NADPH oxidase is a potential candidate protein responsible for electr
 ons extrusion across the cell plasma membrane (PM). Using a specific assay
  to detect extracellular superoxide anion (O2-) generated by NADPH oxidase
 \, we have shown that diatoms can generate extracellular O2-. This product
 ion differs depending on the growth phase of the diatoms. Furthermore\, in
 creasing production of extracellular O2- is positively correlated with inc
 reasing power output\, as measured by the BPV devices and rotating disc el
 ectrode (RDE) electrochemistry. This paves the way to manipulate cells to 
 increase efficiency of BPV devices.   
LOCATION:Department of Plant Sciences\, Large Lecture Theatre
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