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Monitoring and Controlling the Dissolved Oxygen (PO) Concentration within the High Aspect Ratio Vessel (HARV)

机译:监视和控制高纵横比容器(HARV)中的溶解氧(PO)浓度

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摘要

A probe-type oxygen sensor was developed utilizing a radioluminescent (RL)-based light source and a ruthenium-based sensing chemistry for monitoring the dissolved oxygen (DO) concentration in a modified version of the NASA-designed high aspect ratio vessel (HARV), a batch rotating wall vessel. This sensor provided the means to monitor the DO concentration in the HARV without influencing the flow pattern, thereby retaininfg the low shear HARV environment conducive to the formation of 3-dimensional cell aggregates. This sensor lost significant signal as a result of exposure to the first three autoclave cycles, but only minimal change in signal was observed following exposure to subsequent autoclave cycles. A new calibration model requiring only one fitted parameter was developed that accurately fit data over the entire range from 0% to 100% oxygen saturation. The ability for DO concentration control within the vessel was demonstrated by using this sensor to monitor the DO concentration inside the HARV.
机译:利用基于放射(RL)的光源和基于钌的传感化学技术开发了一种探针型氧气传感器,用于监控NASA设计的高长宽比容器(HARV)的改进版本中的溶解氧(DO)浓度。 ,批量旋转壁容器。该传感器提供了一种在不影响流型的情况下监测HARV中DO浓度的方法,从而保持了有助于形成3维细胞聚集体的低剪切HARV环境。由于暴露于前三个高压灭菌循环,该传感器损失了明显的信号,但是暴露于随后的高压灭菌循环后,仅观察到了最小的信号变化。开发了仅需要一个拟合参数的新校准模型,即可在0%至100%氧饱和度的整个范围内精确拟合数据。通过使用此传感器监控HARV内部的DO浓度,可以证明可控制容器内的DO浓度。

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