The connection of liquid phase sonochemistry and non-spherical bubble dynamics has been highlighted also in other types of reactions. Sonoluminescence emissions of excited alkali metals from dissolved salts in water or acids are as well interpreted as a signature of liquid–gas mixture in the collapsing bubble, as the metal ions are non-volatile , , , ,  and . In some works a correlation of bubble translational motion and emission lines like Na∗ has been observed, which can as well be interpreted as a source of non-spherical dynamics. In particular a forward jetting collapse of a sufficiently fast moving bubble has been predicted  and  and observed , and the jetting seems to be an appropriate collapse modality of bubbles in sulphuric Nilotinib to emit the Na∗ line . The jetting mechanism as a source of liquid micro-drop injection into the hot gas phase has also been proposed by Troia et al. for the CCl4 decomposition in the Weissler type reaction , even though for a single levitated bubble. Recently, hints have been found recombinant DNA technology few-bubble cluster dynamics can boost emission of metal lines in aqueous solutions of the corresponding salts  and . Possible mechanisms of the liquid–gas mixture apart from jetting are surface shape (modal) oscillations , bubble splitting, and bubble coalescence. All these mechanisms might be contributing in the chemically active few-bubble clusters we observe, but discrimination between the different scenarios is not yet possible. Some subjective visual impressions from high-speed movies tend to the opinion that surface modes are a main agent, and that mainly or only the largest cluster bubble is really active.