Lumbar Plexus Definition Lumbar plexus is a group of four nerves (L1, L2, L3 and L4) that are located in front of the hip joint and follow the leg down to the thigh. Each of these nerves has specific branches and is associated with particular actions. Each of these labels (L1, L2, L3 and L4) [&he.....
Propylene Carbonate Definition Propylene carbonate is a clear, odorless solvent with a high boiling point. It is an organic compound with the formula CH3C2H3O2CO. In cosmetics and personal care products, Propylene Carbonate is used in the formulation of makeup, primarily lipstick, eye shadow, and.....
Peripheral Nervous System Definition Peripheral nervous system (PNS) is the part of the nervous system in vertebrate animals that lies outside of the brain and spinal cord (central nervous system). It includes the nerves that extend to the limbs and many sense organs. It contains all the nerves i.....
Nickel Definition Nickel is a silvery, hard, ductile metallic element that occurs in ores along with iron or magnesium. It occurs sparingly in nature in minerals such as pentlandite and niccolite. It is present in most meteorites. It resists oxidation and corrosion and is used to make alloys such.....
Propylene Oxide Definition Propylene oxide is a chemical compound that is organic in nature and acts as a chemical intermediate in many chemical processes used in industries. It is an organic compound with the molecular formula CH3CHCH2O. This compound is sometimes called 1,2-propylene oxide to d.....
Chromite Definition Chromite is a brownish-black mineral consisting of a ferrous chromic oxide in cubic crystalline form, occurring principally in basic igneous rocks: the only commercial source of chromium and its compounds. It is an oxide mineral composed of chromium, iron and oxygen (FeCr2O4)......
Myelin Protein Zero Definition Myelin protein zero (PO, MPZ) is a glycoprotein which in humans is encoded by the MPZ gene. This gene is specifically expressed in Schwann cells of the peripheral nervous system and encodes a type I transmembrane glycoprotein that is a major structural protein of th.....
Axioms of Algebra An Axiom is a mathematical statement that is assumed to be true. There are five basic axioms of algebra. Axioms are generally statements made about real numbers. Sometimes they are called algebraic postulates. The axioms are the reflexive axiom, symmetric axiom, transitive axiom.....
Propylene Glycol Definition Propylene glycol is a colorless, viscous liquid used in antifreeze solutions, in hydraulic fluids, and as a solvent. Unlike ethylene glycol, it is not toxic and is also used in foods, cosmetics, and oral hygiene products. Its chemical formula: C3H8O2. It is also called.....
Lava Tube Definition Lava tubes are the longest and most complicated of volcanic caves. They are the channels of rivers of lava that at some earlier time flowed downslope from a volcanic vent or fissure. The size of these tubes is very variable. Thus, the Kazumura, in Hawaii, at 59.3 km, is the l.....
Oligodendrocyte Definition Oligodendrocyte is any of the neuroglial cells of the central nervous system that are responsible for the formation of myelin sheaths in the white matter and that, in the gray matter, is detectable using myelin staining techniques and may provide support for adjacent ne.....
Volcanic Rock Definition Volcanic rock is an igneous rock of volcanic origin. It differs from other igneous rock by being of volcanic origin. Volcanic rocks are usually fine-grained or aphanitic to glassy in texture. They often contain clasts of other rocks and phenocrysts. Volcanic rocks are amo.....