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.
A polyurethane material, or PU material for short, is a type of versatile plastic. The three types of PU materials are flexible foams, rigid foams and elasto-plastics. These materials are most often used in building construction, the automotive industry and in furniture manufacturing. Continue Reading.