“This is the first outstanding book focusing on the comprehensive features of ultrafine bubbles (UFBs). It covers their versatile aspects such as history, fundamentals, and latest applications, and in particular, their existence, stability, and radical formations. It is strongly recommended not only for researchers but also beginners interested in UFBs and wishing to gain new knowledge on the emerging UFB science and technology.”Prof. Emer. Kiyoshi YoshikawaKyoto University, Japan“This book is the bible of UFB research, discussing the characteristics, generation methods, and industrial applications of UFBs, as well as mechanisms of their various effects.”Prof. Takashi HataNational Institute of Technology, Kochi College, Japan