BIOSCANNER-A DEVICE RECORDING AUTOMATICALLY THE COURSES OF MICROBIAL GROWTH THROUGH SCANNING PROCEDURE WITH TWENTY-ONE CHANNELS

An apparatus "Bioscanner", which is able to record automatically growth curves of 21 samples as a lot, was constructed. This has a scanning device with a shiftable light source connected with a photocell. The cultivation is carried out in L-form tubes fixed on a holder, which is placed in a rolling water bath. Growth curves of 21 specimens are recorded on an endless chart. A linear relationship between transmission value and the logarithm of cell density can be hold at the range of 15% to 100% transmission.Some examples of characteristic growth curves are presented employing test organisms of different properties.