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Media which has been made so that the by-products of microbiological growth cause certain reactions which allow the laboratory to see what type of microorganisms are growing. Most differential media is also selective. For example: if a bacteria can digest lactose, the by- product will be lactic acid. A differential media may have a dye which is colourless, but turns black in acidic conditions. Therefore black rings show that the colonies are digesting lactose.

Mixing a chemical with water so it is not so strong.

Being careful and responsible with other people’s personal information.

Spread out.

Get rid of.

When a substance mixes completely into a liquid. For example, when sugar mixes with water the sugar disappears into the water – the sugar has been dissolved into the water.

Sometimes known as a Spreader Plate, this plate spreads the milk infeed evenly across the top of the calandria to ensure even distribution into the tubes and therefore, even heating.