Bubbles and Micro-bubbles
Bubbles are Gas Particles in Liquid.
Drugs are wrapped in a coating of carbonic acid gas or other gas bubbles, introduced into the body and delivered to the infected area. Though considerable effect is anticipated as the concentration of the drug is high at the infected area, side effects will be less since a smaller amount of the drug is used. And, gases that form the bubble are absorbed into the body as time passes. The control of particle size is important since particles might block blood capillaries.
Detergent is wrapped in a coating of bubbles and introduced. Since the area of contact between the detergent and dirt is large, effective cleaning is possible with even a small amount of detergent. Surface area increases as bubbles become smaller in size, thus resulting in increased overall area of contact with dirt.
Gas such as ozone having high sterilizing capability is used. Localized impact and heat generated when bubbles burst increases the sterilizing effect.
Micro blood vessels are developed in cancer cells, and fine bubbles are more likely to build up in these areas. This property of bubbles is used for an angiographic contrast medium for ultrasonic diagnostic systems.
Is it possible to measure the size of a bubble?
Sometimes foaming agent is used and sometimes special bubble generators are used to generate air bubbles (Micro-bubbles).
In leading-edge areas, though the application of air bubbles (Nano-bubbles) of several hundred nm through 100 nm (0.1 µm) in size is being investigated, there are apparently still many unknown points regarding the nature of nanobubbles including their size.