Bubble bore holes

Slurries may contain sensitizing additives (e.g. TNT PETN, etc.) sensitization can also be achieved by introducing finely dispersed air bubbles, e.g. by introducing air-filled - Microballoons (in this form the bubbles will not be compressed by static pressure). Sensitized slurries can be cap-sensitive and may detonate even when the diameter of the bore-hole is small - Emulsion Slurries. Sensitized explosive slurries in the form of cartridges can be utilized in boreholes of conventional and large diameters. In addition, explosive slurries may be pumped into large boreholes. 

Put grids in Eppendorf microtubes filled with an antigen retrieval solution (10 mmol/1 citric acid, pH 6.0) and heat them in a domestic pressure cooker at boiling point for 2 5 min (Buchwalow et al. 2004, 2005). The cap of the microtube must have a hole bored by a needle in order to prevent the loss of the material in the process of bubble formation when boiled in a retrieval solution. 

A similar effect can be observed in the corrosion of top horizontal surfaces situated over the melt (e.g. in the throats of glass melting furnaces). A bubble of gas adhering to the interface will develop intensive flow in its neighbourhood as a result of a surface tension gradient and will quite rapidly bore a cylindrical hole in the upward direction ( bubble drilling ). Drops of molten metal act similarly but in the opposite direction (e.g. metallic lead at the glass furnace bottom). 

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