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A calcium–aluminium-rich inclusion or Ca–Al-rich inclusion (CAI) is a submillimeter- to centimeter-sized light-colored calcium- and aluminium-rich inclusion found in carbonaceous chondrite meteorites. The four CAIs that have been dated using the Pb-Pb chronometer yield a weighted mean age of 4567.30 ± 0.16 Myr.
The following inclusion types can also be found in aluminium alloys: alumina needles (Al 2 O 3), nitrides (AlN), iron oxides (FeO), manganese oxides (MnO), fluorides (Na 3 AlF 6, NaF, CaF 2, …), aluminium borides (AlB 2, AlB 12), borocarbides (Al 4 C 4 B). Bone ash (Ca 3 (PO 4) 2) sometimes added to patch cracks in the trough can be found as ...
Molecular biology has shown that the nicotinic and muscarinic receptors belong to distinct protein superfamilies.Nicotinic receptors are of two types: Nm and Nn. Nm [1] is located in the neuromuscular junction which causes the contraction of skeletal muscles by way of end-plate potential (EPPs).
Calcium aluminosilicate, an aluminosilicate compound with calcium cations, most typically has formula CaAl 2 Si 2 O 8. [1] In minerals, as a feldspar, it can be found as anorthite, an end-member of the plagioclase series.
Unit cell of Ca 2 SiO 4. Color code: red (O), blue (Ca), gold (Si). As verified by X-ray crystallography, calcium silicate is a dense solid consisting of tetrahedral orthosilicate (SiO 4 4-) units linked to Ca 2+ via Si-O-Ca bridges. There are two calcium sites. One is seven coordinate and the other is eight coordinate. [11]
Al fondo hay sitio (Spanish: There's Room in the Back) is a Peruvian comedy television series released in March 2009 by Efraín Aguilar.The story revolves around two very different families living in the same neighbourhood, the Gonzales (a low-class family who have just moved from Huamanga, Ayacucho) and the Maldini (a rich and powerful family with a high economic status).
Artificial scarcity is scarcity of items despite the technology for production or the sufficient capacity for sharing.The most common causes are monopoly pricing structures, such as those enabled by laws that restrict competition or by high fixed costs in a particular marketplace.