Ein Durchflusszählrohr mit getrennter Messkammer für Mikroversuche mit biologischem Material in geschlossenen Systemen

Summary A fluid-measuring tube with separate cell measuring and counting chamber, is described with which metabolic transposition of small amounts of biological materials can be examined within an enclosed system. Tests were carried out on the course of the expiration of sucrose through phylloxers weighing 20 mg, and also on the fixation in the dark of CO₂ by 8 green grapes. Tests were also carreied out on the expiration of sucrose and malic acid by yeast in fermentation. The course of metabolism can easily be seen by means of the radioactivity curves.