For sterilization purposes. The process of heating the loop to white hot kills all bacteria that remain between samples.
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A wire loop is heated in a Bunsen burner to sterilize it before use in microbiological procedures, such as inoculating cultures. Heating the loop to red-hot temperatures helps to kill any microorganisms present on the loop, reducing the risk of contamination during experiments.
the iron ring, the wire mesh over the ring, the beaker or whatever else was being heated. There are special tongs for most types of glassware or porcelain objects that are heated over a Bunsen burner.
the iron ring, the wire mesh over the ring, the beaker or whatever else was being heated. There are special tongs for most types of glassware or porcelain objects that are heated over a Bunsen burner.
The evidence that indicates only physical changes occur when a platinum wire is heated in a Bunsen burner flame includes the fact that the platinum wire does not combine with oxygen or any other element in the flame to form a new substance, and the wire retains its chemical properties after cooling down. The color change of the wire due to heating is a reversible physical change, and the wire can be restored to its original state without any alteration in its composition.
it's hardly a wire, more of a tube I would say
The metal mesh is called a wire gauze or a wire mesh. It is placed on top of the tripod to evenly distribute the heat from the Bunsen burner and prevent direct contact between the glassware and the flame, reducing the risk of thermal shock and cracking.