Renal agenesis. Renal agenesis is a medical condition in which one (unilateral) or both (bilateral) fetal kidneys fail to develop.
Polycrystalline cells are composed of multiple silicon crystals, which is a cheaper way to manufacture solar modules. Put simply, these cells are easier for a factory to produce, so they are less expensive. Polycrystalline cells are made by several methods, but most commonly with a cast of molten silicon.
mechanism semicrystalline polymers plastically deform. plastic deformation involved the tilting and deformation of the crystalline blocks to align with the applied stress. The crystalline blocks then begin to separate into smaller disengaged blacks of material. These blocks become further separated and disengaged from each other (further plastic deformation) until the blocks are sepatate entities bonded by the remaining amorphous strands.