Through researching the special nozzles, we shoot fan-shape water jet and shoot each other to crush microbe cells and achieve control of particle size. In the test of crushing microbe cells, we find that density of water jet and the size of the nanoparticle is in proportion, for the expression of its function: y=f (x). We create the expansion distance between water molecules formulation: Γ= Γ×η and other mathematical models. When the expansion of multiples η.n=1, the distance between water molecules r0=0.4 nm, the size of particle is less than nano-grade, when ηn=2.6～250, Γn= 1～100 nm, get the broken nano-particles; when ηn>250, Γn>100 nm, the size of broken particle is greater than nano-grade. We developed a water jet microbe cells crusher. We get the Chinese invention patents with No.ZL03143321.9.
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