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Mechanobiological Stimulations of Algal Cells for Energy Harvesting
Advanced Theory and Simulations ( IF 3.3 ) Pub Date : 2021-04-21 , DOI: 10.1002/adts.202000281
Jihwan Song 1 , Dongchoul Kim 2 , Luke P. Lee 1, 3, 4
Affiliation  

Stimulation of microalgae enables high lipid productivity because the induced stress can lead to a change in the microalgal metabolism. However, existing systems based on the control of pH, temperature, or nitrogen that stimulate microalgae through a culture medium face difficulties in maintaining the stress or are accompanied by complicated procedures to exert this stress, which decreases the lipid productivity. Here, the mechanobiological stimulations of algal cells via effective collisions in a soft lattice and phototaxis system are presented for energy harvesting. An energy harvesting system with a soft lattice (i.e., a micropillar array) is designed, which radiates light through a waveguide. Numerical simulations show that the average number of collisions when the distance of the soft lattice is set to be 10 mm and the intensity of light is set to 30 W m−2 is increased by up to 300% than in conditions without light. However, more interestingly, this amplifying effect disappears when the distance of the soft lattice becomes significantly small (e.g., 0.1 mm) owing to the reduced gradient and excessively enhanced intensity of light by their superposition. This analysis provides important insights into the design of mechanobiological stimulation-based energy harvesting systems of algal cells.

中文翻译:

用于能量收集的藻类细胞的机械生物学刺激

刺激微藻可实现高脂质生产力,因为诱导的压力会导致微藻代谢发生变化。然而,现有的基于 pH、温度或氮控制的系统通过培养基刺激微藻在维持压力方面面临困难,或者伴随着复杂的程序来施加这种压力,这降低了脂质生产力。在这里,通过软晶格和趋光系统中的有效碰撞对藻类细胞进行机械生物学刺激,用于能量收集。设计了具有软晶格(即微柱阵列)的能量收集系统,其通过波导辐射光。-2比没有光照的条件增加高达 300%。然而,更有趣的是,当软晶格的距离变得非常小(例如,0.1 毫米)时,这种放大效应会消失,这是由于它们的叠加导致光的梯度降低和过度增强。该分析为基于机械生物学刺激的藻类细胞能量收集系统的设计提供了重要的见解。
更新日期:2021-06-05
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