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Cattierite (Co S 2), vaesite (Ni S 2) and hauerite (Mn S 2), as well as sperrylite (Pt As 2) are similar in their structure and belong also to the pyrite group. Bravoite is a nickel-cobalt bearing variety of pyrite, with > 50% substitution of Ni 2+ for Fe 2+ within pyrite. Bravoite is not a formally recognised mineral, and is named after the ...
This page is a glossary of architecture. A flat slab forming the uppermost member or division of the capital of a column. A sculptural embellishment of an arch. The subsidiary space alongside the body of a building, separated from it by columns, piers, or posts. The space enclosed in a church between the outer gate or railing of the rood screen ...
The structure of 40-42 kDa porphobilinogen deaminase, which is highly conserved amongst organisms, consists of three domains. [5] [6] Domains 1 and 2 are structurally very similar: each consisting of five beta-sheets and three alpha helices in humans. [7] Domain 3 is positioned between the other two and has a flattened beta-sheet geometry.
In general, synthetic fibers are created by extruding fiber-forming materials through spinnerets, forming a fiber. These are called synthetic or artificial fibers. The word polymer comes from a Greek prefix "poly" which means "many" and suffix "mer" which means "single units". (Note: each single unit of a polymer is called a monomer).
Zinc sulfide (or zinc sulphide) is an inorganic compound with the chemical formula of ZnS. This is the main form of zinc found in nature, where it mainly occurs as the mineral sphalerite. Although this mineral is usually black because of various impurities, the pure material is white, and it is widely used as a pigment.
Heparin, also known as unfractionated heparin (UFH), is a medication and naturally occurring glycosaminoglycan. [3][4] Heparin is a blood anticoagulant that increases the activity of antithrombin. [5] It is used in the treatment of heart attacks and unstable angina. [3]
Synovial fluid, also called synovia, [help 1] is a viscous, non-Newtonian fluid found in the cavities of synovial joints. With its egg white –like consistency, [1] the principal role of synovial fluid is to reduce friction between the articular cartilage of synovial joints during movement. [2] Synovial fluid is a small component of the ...
Palapa (structure) A palapa (a Spanish word of Tagalog origin, originally meaning " petiole of the palm leaf") is an open-sided dwelling with a thatched roof made of dried palm leaves. [1] It is very useful in hot weather and, therefore, very common on Mexican beaches and deserts. According to Rubén Carrillo, palapa is derived from the ...