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1- Bubbles are gas-filled cavities within the liquid with variable properties depending on their size.

2- Ordinary bubbles are not stable for long periods of time, rising and bursting on the surface, but bubbles in micron-size shrink and disappear in the solvent. However, Nanobubbles are stable for a significant amount of time.

3- The total surface area of a certain volume of gas is in inverse proportion to the forming bubble diameter.

4- The stability of nanobubbles, together with their high surface area per volume, endows them with important and useful applications.