| 1. |
- Liu, Zhidan, et al.
(author)
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Microbial fuel cell based biosensor for in situ monitoring of anaerobic digestion process.
- 2011
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In: Bioresource Technology. - : Elsevier BV. - 1873-2976 .- 0960-8524. ; 102, s. 10221-10229
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Journal article (peer-reviewed)abstract
- A wall-jet microbial fuel cell (MFC) was developed for the monitoring of anaerobic digestion (AD). This biofilm based MFC biosensor had a character of being portable, short hydraulic retention time (HRT) for sample flow through and convenient for continuous operation. The MFC was installed in the recirculation loop of an upflow anaerobic fixed-bed (UAFB) reactor in bench-scale where pH of the fermentation broth and biogas flow were monitored in real time. External disturbances to the AD were added on purpose by changing feedstock concentration, as well as process configuration. MFC signals had good correlations with online measurements (i.e. pH, gas flow rate) and offline analysis (i.e. COD) over 6-month operation. These results suggest that the MFC signal can reflect the dynamic variation of AD and can potentially be a valuable tool for monitoring and control of bioprocess.
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| 2. |
- Liu, Dan, et al.
(author)
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One-step separation and purification of hydrolysable tannins from Geranium wilfordii Maxim by adsorption chromatography on cross-linked 12% agarose gel
- 2011
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In: Journal of Separation Science. - : Wiley. - 1615-9306 .- 1615-9314. ; 34:9, s. 995-998
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Journal article (peer-reviewed)abstract
- The hydrolysable tannins corilagin and geraniin, the major active components of the traditional Chinese medicine Geranium wilfordii Maxim, have been separated and purified from crude extracts in one step by adsorption chromatography on cross-linked 12% agarose gel (Superose 12 10/300 GL). The separation was achieved by gradient elution using mobile phase A composed of 5% ethanol and 5% acetic acid and mobile phase B composed of 30% ethanol and 30% acetic acid. The gradients were composed as follows: 0-240 mL, 0-25% B; 240-480 mL, 25-40% B; after 480 mL, 100% B. The purities of the collected corilagin and geraniin were 92.4 and 87.2%, and the corresponding yields were 88.0 and 76.8%, respectively.
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