Abstract
The story of autonomous unicellular organisms, bacteria with unimaginable computational and evolutionary capabilities along with collective behavior has been running since the first six decades of the twentieth Century. However, do not consider them to be small and simple, because they possess the generic term quorum sensing adopted to describe the cell communication process which co-ordinate gene expression, when the population has reached a high cell density. Bacteria release diffusible signal molecules known as autoinducers or quorum sensing molecules. In recent research, the direction for activating or deactivating nature of a wave of gene expression is predicted experimentally which control bacterial populations subject to a diffusing autoinducer signal. On the other hand, it has been observed that the accumulation of the quorum sensing molecules leads to a negative diffusion coefficient in the solution of governing differential equation.
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