Science

There are four basic properties of numbers: commutative, associative, distributive, and identity. Basically, there are three properties. These are the commutative, associative, and the distributive…

Progenitor Cell Definition Progenitor cell is a cell that originates from a stem cell and differentiates into a more specialized cell. A progenitor cell is…

Silica Fume Definition Silica fume is a co-product from the production of silicon or ferrosilicon metal. Silica fume is a mineral admixture, a very fine…

Nile River, the longest river in the world, called the father of African rivers. It rises south of the Equator and flows northward through northeastern…

Neurotrophin Definition Neurotrophins (neurotrophic factors) are proteins which induce the survival of neurons and are found in the blood stream. Neurotrophins are capable of signaling…

Ammonium Definition Ammonium is a positively charged ion, NH4, derived from ammonia and found in a wide variety of organic and inorganic compounds. Compounds of…

Schwann cell Definition Schwann cell is any of the cells that cover the axons in the peripheral nervous system and form the myelin sheath. It…

Ethanium Definition Ethanium is a trypanocidal agent and possible antiviral agent that are widely used in experimental cell biology and biochemistry. Ethidium has several experimentally…

Basic Definitions Relating to Numbers Basic numbers are the haploid number of chromosomes; specifically the lowest haploid number of a polyploid series. Some key points…

Moissanite Definition Moissanite is a rare gem that has almost all of the qualities of a diamond. It was first discovered in 1893, with the…

Myelin Definition Myelin is a whitish, fatty substance that forms a sheath around many vertebrate nerve fibers. Myelin insulates the nerves and permits the rapid…

Silicon Carbide Definition Silicon carbide (SiC) is an extremely hard bluish-black insoluble crystalline substance produced by heating carbon with sand at a high temperature and…