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.
by admin. Crystalline vs Polycrystalline. Although we define solids as crystalline or amorphous, in nature there are few examples of these pure forms. Most of the time, they are mixed together or form variations. Polycrystalline is such a variation from the crystalline solids.