I assume you mean when the potato is cooking in water it produces foam which floats on top of the water, in which case it is starch. If you rinse cut potatoes before boiling it will reduce the amount of foam in the water. Also, it is possible to simply spoon off the foam.
Plant foaming and polymer foaming
From first hand experience, foaming hand soap will work in a non-foaming dispenser. Although the soap will come out as regular soap, not foam. The foaming soap will work as regular soap, just not foaming soap.
Foaming is the present participle of foam.
Foaming is a chemical phenomenon.
simethecone and other non-foaming detergents are good anti-foaming agents.
Foaming is the caused by the blockage of gas particles in liquids.
No. If you are foaming, see your doctor.
Foaming at the mouth is not normal in any animal ! Get it to a vet - NOW !
The foaming capacity of soap is determined by how much detergent is in it. Less detergent means little foaming while more detergent will have more foam.
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Sodium lauryl Sulfate is a foaming agent in toothpaste
The foaming waves sizzled on the sand as the Sun sank below the horizon.