Foam accumulates on the surface kept for a long time in summer

1.	Foam accumulates on the surface kept for a long time in summer
Answer» 1. Saponins - Lentils contain glycosides called Saponins. When they come in contact with water, they get dissolved. These saponins are substances which have properties similar to soap, which when boiled trap the air in them forming a foam. 2. Protein Denaturation - Another theory is that the proteins in the lentils are released when boiled. The air particles which hold more dissolved gases than the hot water leech out forming a foam on the surface. Since it is harmful toconsume any denatured protein or a substance whose natural structure has beendamaged, it is advisable to remove the foam from the surface before consumingthem.

Answer»

1. Saponins - Lentils contain glycosides called Saponins. When they come in contact with water, they get dissolved. These saponins are substances which have properties similar to soap, which when boiled trap the air in them forming a foam.

2. Protein Denaturation - Another theory is that the proteins in the lentils are released when boiled. The air particles which hold more dissolved gases than the hot water leech out forming a foam on the surface.

Since it is harmful toconsume any denatured protein or a substance whose natural structure has beendamaged, it is advisable to remove the foam from the surface before consumingthem.

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