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Erythema ab igne (Latin for 'redness from fire') EAI, also known as hot water bottle rash, [2] is a skin condition caused by long-term exposure to heat (infrared radiation). [3] Prolonged thermal radiation exposure to the skin can lead to the development of reticulated erythema , hyperpigmentation , scaling, and telangiectasias in the affected ...
Emerald is a gemstone and a variety of the mineral beryl (Be 3 Al 2 (SiO 3) 6) colored green by trace amounts of chromium or sometimes vanadium. [2] Beryl has a hardness of 7.5–8 on the Mohs scale. [2] Most emeralds have many inclusions, [3] so their toughness (resistance to breakage) is classified as generally poor.
An unguentarium (pl.: unguentaria), also referred to as balsamarium (pl.: balsamarii), lacrimarium (pl.: lacrimarii) or tears vessel, [1] is a small ceramic or glass bottle found frequently by archaeologists at Hellenistic and Roman sites, especially in cemeteries. [2] Its most common use was probably as a container for oil, though it is also ...
Studies indicate that microplastic levels in bottled water tend to be higher than those found in tap water. Concentrations can range from a mere 0.0001 particles per liter to a staggering 930 ...
The combination of this modulus and a relatively low density results in an unusually fast sound conduction speed in beryllium – about 12.9 km/s at ambient conditions. Other significant properties are high specific heat ( 1925 J·kg −1 ·K −1 ) and thermal conductivity ( 216 W·m −1 ·K −1 ), which make beryllium the metal with the ...
Red beryl, formerly known as bixbite and marketed as red emerald or scarlet emerald, is an extremely rare variety of beryl as well as one of the rarest minerals on Earth. [1][2]: 19 The gem gets its red color from manganese ions embedded inside of beryllium aluminium cyclosilicate crystals. [1] The color of red beryl is stable up to 1,000 °C ...
Synchlora aerata. Synchlora aerata, the wavy-lined emerald moth or camouflaged looper, is a species of moth of the family Geometridae. The species was described by Johan Christian Fabricius in 1798. [2][3] It is found in the United States and Canada. [1][4] The wingspan is about 17 mm. [4] The larvae are loopers (inchworms) like the rest in the ...
The Gachalá Emerald, one of the most valuable and famous emeralds in the world, was found in 1967, in the mine called Vega de San Juan, located in Gachala, a town in Colombia, located 142 km (88 mi) from Bogota. Gachalá Chibcha means "place of Gacha." [1] Presently the emerald is in the United States, where it was donated to the Smithsonian ...