Science

Magnesium Carbonate Definition Magnesium carbonate (MgCO3) is a white or brown crystalline solid or crystalline powdery compound that occurs naturally as dolomite and magnesite and…

What is Permafrost? Permafrost is a thick subsurface layer of soil that remains frozen throughout the year, occurring chiefly in Polar Regions. It is defined…

Heat Shock Protein Definition Heat shock protein (HSP) is an intracellular protein that increases in concentration during metabolic stress, such as exposure to heat. HsPs…

Terbium Definition Terbium is a soft, silvery-gray metallic element of the lanthanide series. It is used in color television tubes, x-ray machines, and lasers. Its…

Persian Gulf Oil The gulf has many fishing grounds, extensive reefs (mostly rocky, but also coral), and abundant pearl oysters, but its ecology has been…

Steroid Hormone Receptor Definition Steroid hormone receptor includes 48 receptors for the gonadal and adrenal steroids, nonsteroidal ligands such as thyroid hormones, vitamin D, retinoic…

Gadolinium Definition Gadolinium is a silvery-white, malleable, ductile metallic element of the lanthanide series that has seven natural isotopes and 11 artificial isotopes. It is…

Oil Sands A mixture of sand or clay, water and extremely viscous petroleum called bitumen. Often referred to as unconventional oil. Oil sands are a…

Magnesium Chloride Definition Magnesium chloride is a chemical element and its atomic number 12, atomic weight 24.312, symbol Mg. It is an inorganic salt (compound)…

Wind power is the kinetic energy of wind, harnessed and redirected to perform a task mechanically or to generate electrical power. Winds are caused by…

Limonite Definition Limonite is a common brown, black, or yellow amorphous secondary mineral that consists of hydrated ferric oxides and is a source of iron.…

Glucocorticoid Receptor Definition Glucocorticoid Receptor (GR) also known as NR3C1 (nuclear receptor subfamily 3, group C, member 1), which is mediates actions of glucocorticoids (GCs)…