![]() ![]() It may be that whatever bacteria are there are not able to grow on the bacteria food, also known as agar, we provided in the petri plate. Maybe there’s only a little bacteria growing on the petri plate, this could mean two things. ![]() Maybe a door handle, or sink faucet, or even the paper towel dispenser. What does that mean? Most likely after you washed your hands you touched something that was not clean. But maybe you see an increase in bacteria from A to B. So what does all this bacteria growing on the plate mean? If you did a good job washing your hands the number of bacteria should decrease from the A side to the B side. Variable volume pipettes allow the transfer of liquids easily using one hand. Each variable volume pipette has a range of volumes of liquid that can be transferred, so there are several different sizes available. These pipettes use sterilizable tips to hold the liquid that is being transferred. With a variable volume pipette you can adjust the exact volume of the liquid that is being transferred. These pipettes have a bulb at one end that is pressed and released to pull the liquid into the pipette and pressed again to release the liquid. Disposable or transfer pipettes are used to transfer small amounts of liquid. These pipettes have narrow tips and a bulb-like structure in the middle and can only transfer a specific volume of liquid that the pipette was designed to transfer. ![]() Volumetric pipettes are used to accurately transfer a specific volume of liquid. There are several different types of pipettes including volumetric pipettes, disposable pipettes (or transfer pipettes), and variable volume pipettes. Pipettes are common lab equipment that are used to transfer liquids. ![]()
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