Journal
LAB ON A CHIP
Volume 11, Issue 10, Pages 1730-1739Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c1lc20019d
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Funding
- National Science Foundation
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This work reports on an instrument capable of supporting automated microscale continuous culture experiments. The instrument consists of a plastic-PDMS device capable of continuous flow without volume drift or evaporation. We apply direct computer controlled machining and chemical bonding fabrication for production of fluidic devices with a 1 mL working volume, high oxygen transfer rate (k(L)a approximate to 0.025 s(-1)), fast mixing (2 s), accurate flow control (+/- 18 nL), and closed loop control over temperature, cell density, dissolved oxygen, and pH. Integrated peristaltic pumps and valves provide control over input concentrations and allow the system to perform different types of cell culture on a single device, such as batch, chemostat, and turbidostat continuous cultures. Continuous cultures are demonstrated without contamination for 3 weeks in a single device and both steady state and dynamically controlled conditions are possible.
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