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Riboswitch-controlled formation of rho-independent transcription termination hairpins leads to premature transcription termination. Riboswitch-mediated folding sequesters the ribosome-binding site, thereby inhibiting translation. The riboswitch is a ribozyme that cleaves itself in the presence of sufficient concentrations of its metabolite.
This list of jewellery types is a listing of most types of jewellery made. Hair Ornaments. Crowns; ... Puzzle jewelry. Puzzle ring; Signet ring; Thumb ring; Gemstone ...
The NiCo riboswitch is a riboswitch that senses nickel or cobalt ions. [1] Thus, it is an RNA molecule that specifically binds these metal ions, and regulates genes accordingly. The riboswitch is thought to be a part of a system that responds to toxic levels of these metal ions, although the riboswitch might also participate in dealing with the ...
The Napier Company (1922-present). Flask, 1925-1930. Sterling silver and cork, 9 5/8 x 4 1/2 x 1 3/16in. (24.4 x 11.4 x 3cm). Brooklyn Museum, Modernism Benefit Fund. Napier necklace with tag. The Napier Company is an American jewelry manufacturing company, and was one of the first modern corporations in the United States.
A plug (sometimes earplug or earspool), in the context of body modification, is a short, cylindrical piece of jewelry commonly worn in larger-gauge body piercings. [ 1 ] Modern western plugs are also called flesh tunnels. Because of their size—which is often substantially thicker than a standard metal earring —plugs can be made out of ...
Piercing jewelry is often made of a gold alloy, the most common being 18k, with 24k being entirely pure and much softer. 18k gold usually contains 75% gold and the remaining 25% copper, silver and traces of other metals. In lower quality gold, zinc, nickel and other irritants can also be found.
The Byzantines perfected a unique form of cloisonné icons. Byzantine enamel spread to surrounding cultures and a particular type, often known as "garnet cloisonné" is widely found in the Migration Period art of the "barbarian" peoples of Europe, who used gemstones, especially red garnets, as well as glass and enamel, with small thick-walled cloisons.
Rhinestone. Historic rhinestone copy of the Florentine Diamond, made in 1865 in Paris by the L. Saemann company [1] Rhinestones on a tiara. Rowenta enamel rhinestone compact. A rhinestone, paste or diamante is a diamond simulant originally made from rock crystal but since the 19th century from crystal glass or polymers such as acrylic.