An image compression method with random access capability. The method further includes retaining the treatment fluid at the lower pH value until the polymer achieves a primary hydration value. A movable member moves above the stator. Methods of using the dendrimer, poly-branched molecule in assays of biological molecules are also described. The apparatus includes a vibrational energy source couplable to the proximal end of the wire for selectively applying vibrational energy to the wire to travel to the discontinuity and cause detachment of the end section.