Abstract: A method for collapsing a microbubble includes applying stimulation to the microbubble during the gradual decrease of the its size. As a result, the microbubble floating in a solution that decreases in size due to the natural dissolution of a gas contained in the microbubble and disappears after a while, has the speed of its size decrease enhanced and causes the microbubble to disappear.

Abstract: An object of the present invention is to provide a medical agent that has an excellent effect on the diseases resulting from one of inflammation and remodeling and that can prevent or treat them in response to various mechanisms of onset and development of the diseases. Thus, the present invention relates to a medical agent for preventing or treating diseases resulting from one of inflammation and remodeling in blood vessel, including nanobubbles.

Abstract: The present invention relates to an ozone water that has the potential to find useful applications in a wide variety of technical fields and is capable of maintaining the effects of wiping out microorganisms such as bacteria, viruses and the like and inhibiting the growth thereof over long periods. The present invention provides ozone nano-bubbles capable of staying in a solution for an extended period of time and a method for producing the ozone nano-bubbles by instantaneously shrinking the diameters of ozone microbubbles contained in an aqueous solution by the application of a physical irritation to the ozone microbubbles in an aqueous solution.

Abstract: An object of the invention is to provide a tissue preservation solution that has excellent tissue-preserving ability and is useful in the field of medicine, medical experiment, etc. Thus, the invention relates to a tissue preservation solution including oxygen nanobubbles.