Intercalated
121Amber — is fossil tree resin, which is appreciated for its color and beauty. Good quality amber is used for the manufacture of ornamental objects and jewellery. Although not mineralized, it is often classified as a gemstone. A common misconception is… …
122Agarose gel electrophoresis — is a method used in biochemistry and molecular biology to separate DNA, or RNA molecules by size. This is achieved by moving negatively charged nucleic acid molecules through an agarose matrix with an electric field (electrophoresis). Shorter… …
123Adrenal gland — Endocrine system Adrenal gland …
124Bauxite — is the most important aluminium ore. It consists largely of the minerals gibbsite Al(OH)3, boehmite γ AlO(OH), and diaspore α AlO(OH), together with the iron oxides goethite and hematite, the clay mineral kaolinite and small amounts of anatase… …
125Base pair — In molecular biology and genetics, the linking between two nitrogenous bases on opposite complementary DNA or certain types of RNA strands that are connected via hydrogen bonds is called a base pair (often abbreviated bp). In the canonical Watson …
126Cell membrane — Illustration of a Eukaryotic cell membrane The cell membrane or plasma membrane is a biological mem …
127Fullerene — Buckminsterfullerene C60 (left) and carbon nanotubes (right) are two examples of structures in the fullerene family …
128February 29 — in the Gregorian calendar, which is most widely used in the world today, is a date that occurs only every four years, in years evenly divisible by 4, such as 1996, 2000, 2004, 2008, 2012 or 2016 (with the exception of century years not divisible… …
