The analysis of the bacteria in irregular blocks

In this area, the space is divided by several irregular blocks with different angles at the corner. Bacteria in the plaza-like space near this pattern would not like to swim into channels since during seven seconds, only three to eight bacteria move into it. Bacteria in the right plaza-like space have more probability to go into channels. According to the analysis of the movement of the bacteria; the majority of them tend to go straight through the channels and moving closely along the wall is a character of their movement. Compared with the bacteria which move into this area through the middle and nether channel, the probability of changing direction for bacteria which swim into the top channel is also lower. When there are about 3 bacteria in the whole area, generally only one bacterium choose to turn at any block and when the number of bacteria increase to 7 or 8, about three of them will change their direction of mobility. However, if the bacteria swim into the end of the channel, the majority of them do not know where to go and just stay or rotate at the origin location and several of them will go back and only few of them know to turn at the right angle. Therefore, it can be seen that the bacteria prefer to turn at the smaller angle which is easy to vary their own direction. This is the reason why those bacteria move into the middle channel like to turn right rather then left. The statistics also indicate that, large percentage of the bacteria choose to turn at the block 1 or 8 and then to turn at the block 2 or 7 since the angle fluctuation of block 1 is just 28.24°, block 8 is 26.68°and angles of other blocks generally increase. The average speed of the movement is about 22.83μm/s.

                                                                                        Wrote on 13/02/2012