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  • Impact of bubble size on growth and CO2 uptake of Arthrospira (Spirulina) platensis KMMCC CY-007

    Author(s)
    Kim, Kisok
    Choi, Jaeho
    Ji, Yosep
    Park, Soyoung
    Do, Hyung Ki
    Hwang, Cher Won
    Lee, Bongju
    Holzapfel, Wilhelm
    Griffith University Author(s)
    Hwang, Cher-Won
    Year published
    2014
    Metadata
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    Abstract
    Optimisation of cyanobacterial cell productivity should consider the key factors light cycle and carbon source. We studied the influence of CO2 bubble size on carbon uptake and fixation, on basis of mRNA expression levels in Arthrospira platensis KMMCC CY-007 at 30 °C (light intensity: 40 μmol m−2 s−1; 1% CO2). Growth rate, carbon fixation and lipid accumulation were examined over 7 days under fine bubble (FB) (100 μm Ø) bulk bubble (BB) (5000 μm Ø) and non-CO2 (NB) aeration. The low affinity CO2 uptake mRNA (NDH-I4 complex) was stronger expressed than the high affinity NDH-I3 complex (bicA and sbtA) under 1% CO2 and FB ...
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    Optimisation of cyanobacterial cell productivity should consider the key factors light cycle and carbon source. We studied the influence of CO2 bubble size on carbon uptake and fixation, on basis of mRNA expression levels in Arthrospira platensis KMMCC CY-007 at 30 °C (light intensity: 40 μmol m−2 s−1; 1% CO2). Growth rate, carbon fixation and lipid accumulation were examined over 7 days under fine bubble (FB) (100 μm Ø) bulk bubble (BB) (5000 μm Ø) and non-CO2 (NB) aeration. The low affinity CO2 uptake mRNA (NDH-I4 complex) was stronger expressed than the high affinity NDH-I3 complex (bicA and sbtA) under 1% CO2 and FB conditions, with no expression of bicA1 and sbtA1 after 4 days. The high affinity CO2 uptake mRNA levels corresponded to biomass, carbon content and lipid accumulation, and increase in NDH-I3 complex (9.72-fold), bicA (5.69-fold), and sbtA (10.61-fold), compared to NB, or BB conditions.
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    Journal Title
    Bioresource Technology
    Volume
    170
    DOI
    https://doi.org/10.1016/j.biortech.2014.08.034
    Subject
    Microbiology not elsewhere classified
    Publication URI
    http://hdl.handle.net/10072/173478
    Collection
    • Journal articles

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