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Hyaluronic acid ( / ˌhaɪ.əljʊəˈrɒnɪk /; [1] [2] abbreviated HA; conjugate base hyaluronate ), also called hyaluronan, is an anionic, nonsulfated glycosaminoglycan distributed widely throughout connective, epithelial, and neural tissues.
Incapillo is a Pleistocene -age caldera – a depression formed by the collapse of a volcano – in La Rioja Province, Argentina. It is part of the southernmost volcanic centre in the Andean Central Volcanic Zone (CVZ). Subduction of the Nazca Plate beneath the South American Plate is responsible for most of the volcanism in the CVZ.
Propylene glycol (IUPAC name: propane-1,2-diol) is a viscous, colorless liquid, which is nearly odorless but possesses a faintly sweet taste. Its chemical formula is CH3CH(OH)CH2OH. As it contains two alcohol groups, it is classed as a diol. It is miscible with a broad range of solvents, including water, acetone, and chloroform. In general ...
Botulinum toxin, or botulinum neurotoxin (commonly called botox), is a highly potent neurotoxic protein produced by the bacterium Clostridium botulinum and related species.[23] It prevents the release of the neurotransmitter acetylcholine from axon endings at the neuromuscular junction, thus causing flaccid paralysis.[24] The toxin causes the ...
Schematic Bose–Einstein condensation versus temperature of the energy diagram [clarify] In condensed matter physics, a Bose–Einstein condensate (BEC) is a state of matter that is typically formed when a gas of bosons at very low densities is cooled to temperatures very close to absolute zero (−273.15 C or −459.67 F or 0 K).
Eye color. Eye color is a polygenic phenotypic trait determined by two factors: the pigmentation of the eye 's iris [1] [2] and the frequency-dependence of the scattering of light by the turbid medium in the stroma of the iris. [3] : 9. In humans, the pigmentation of the iris varies from light brown to black, depending on the concentration of ...
Etymology Puerto Rico is Spanish for "rich port". [15] Puerto Ricans often call the island Borinquen, a derivation of Borikén, its indigenous Taíno name, which is popularly said to mean "Land of the Valiant Lord". [33] [34] [35] The terms boricua, borinqueño, and borincano are commonly used to identify someone of Puerto Rican heritage, [36] [37] and derive from Borikén and Borinquen ...
