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The transition metals possess partially-filled d sub-shells and are in groups 4 to 11 of the periodic table. They are hard, very conductive, have multiple oxidation states, display catalytic activity, and can form colored and/or paramagnetic compounds.
Can be used to test a variety of antibiotics carbohydrates substrates antiseptics on bacteria in petri dishes. Soak a disc in a SOLUTIONon or apply some SOLUTIONon on the discs. Then let dry and place it in an inoculated agar plate. Each disc will absorb exactly the same amount of liquid.
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