| 摘要 |
<p>There are disclosed pipette tips (10, 10A, 10B) having a wettable exterior surface (20, 20A, 20B) shaped to force liquid that wets it to not fall under the influence of gravity to the terminal surface (16, 16A, 16B) at which the dispensing aperture (18) is located. For this, the radius Ro of that wettable surface at the terminal surface satisfies the equation (I) Ro < ( sigma / rho g)<1/2> and the slope of the wettable surface satisfies the equation (II) dz/dr < ( sigma <2>/( rho gr<2>)<2> - 1)<1/2> where dz/dr is the rate of change in the height per the rate of change of distance from the axis of symmetry of the tip. <IMAGE></p> |
