| 摘要 |
PURPOSE:To measure and record the growth of microbials with time, intermittently, by arranging a number of culturing tubes radially on an inclined rotary table, and shaking the tubes by the rotational motion of the table. CONSTITUTION:A culturing-tube-holding member 7 furnished with a plurality of clamps and holders radially at regular intervals, is attached to an inclined rotary disc 1. A number of L-shaped culturing tubes, each having a horizontal part a1 and a vertical part a2, are fixed with the clamps 8 and the holders 11. The tubes are capped with breathable plugs c. The disc 1 is rotated by a motor 16, and the culturing liquid in the culturing tube a is shifted reciprocally from the horizontal part a1 to the vertical part a2, vice versa. The concentration of bacterial cells in the tube can be determined by transmitting a light beam l1 from the light source 27 for concentration determination through the tube and a corresponding hole 9 to a photo-cell 28, and at the same time transmitting a light beam l2 from the light source for synchronization 29 directly through a synchronizing signal detecting hole 10 to a photo-cell 30. The concentration signal S1 and the synchronizing signal S2 are transmitted to a recorder 25 as time-division signals.
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