Azotobacter is one of the soil organisms capable of fixing nitrogren. Nitrogen fixers are important in the nitrogen cycle and help convert atmospheric nitrogen into an organic form that is then usable ...

For a long time, almost all attention was on the motile cilia because their function was readily observable. But scientists, starting with Alexander Kowalevsky had reported the presence of single ...

The results of motility agar are often difficult to interpret. Generally, if the entire tube is turbid, this indicates that the bacteria have moved away from the stab mark (are motile). The organisms ...

Each sperm cell, or spermatozoon, is small and motile. The spermatozoon has a flagellum, which is a tail-shaped structure that allows the cell to propel and move. In contrast, each egg cell ...

Figure A.1: AAO process, flow diagram. A wastewater treatment process used in Europe that uses two acti vated sludge plants in series, i.e. aeration tank, sedimentation tank. Each sedimentation ...