Beta-lactamase-producing bacteria (BLPB) may have an important clinical role in infections. These organisms can be pathogenic in causing the infection as well as have an indirect effect through their ability to produce the enzyme BL into their environment.
If you turn the dial to number 0, that effectively turns the fridge off. Setting the dial to 9, the refrigerator will be working at its max capability. Your personal temperature setting will depend on how much food is kept in the refrigerator. If your fridge is packed with food, it needs to be on a higher number setting to maintain a low (colder) temperature. The temperature controller dial or slider on your refrigerator is a thermostat. It kicks the compressor on when the refrigerator is not cold enough.
Unfortunately it only covers 21 brands, and only some years or models of some brands. But it may help in identifying whether you have a refrigerator manufactured in the 1970s or 1980s. To use this tool, you will need to know the brand name, model number, and serial number of your refrigerator. The brand name will usually be on the front door.