Mitochondrial disease is a group of disorders caused by dysfunctional mitochondria, the organelles that generate energy for the cell.itochondrial diseases are sometimes (about 15% of the time) caused by mutations in the mitochondrial DNA that affect mitochondrial function.
1 Surface-mounted light â the finished housing is exposed, not flush with surface. 2  Chandelier. 3  Pendant light â suspended from the ceiling with a chain or pipe.  Sconce â provide up or down lights; can be used to illuminate artwork, architectural details; commonly used in hallways or as an alternative to overhead lighting.
Social Sciences. A tricing pendant is part of the rigging that allows lifeboats to be launched. The system to launch a lifeboat is complex and the tricing pendants play an essential role if the ship is heeling or laid over because of damage. To launch a lifeboat the boats must first be freed from the cradle straps called Gripes.