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Orthogonal protection is a strategy allowing the specific deprotection of one protective group in a multiply-protected structure. For example, the amino acid tyrosine could be protected as a benzyl ester on the carboxyl group, a fluorenylmethylenoxy carbamate on the amine group, and a tert -butyl ether on the phenol group.
The World Trade Center site, often referred to as "Ground Zero" or "the Pile" immediately after the September 11 attacks, is a 14.6-acre (5.9 ha) area in Lower Manhattan in New York City. [ 1 ] [ 2 ] The site is bounded by Vesey Street to the north, the West Side Highway to the west, Liberty Street to the south, and Church Street to the east.
Volunteers quickly descended on Ground Zero to help in the rescue and recovery efforts. At Jacob Javits Convention Center, thousands showed up to offer help, where they registered with authorities. [37] Construction projects around the city came to a halt, as workers walked off the jobs to help at Ground Zero. [38]
The United States Environmental Protection Agency September 11 attacks pollution controversy was the result of a report [1] released by the Office of the Inspector General of the United States Environmental Protection Agency (EPA) in August 2003 which said the White House pressured the EPA to delete cautionary information about the air quality in New York City around Ground Zero following the ...
The line segments AB and CD are orthogonal to each other. In mathematics, orthogonality is the generalization of the geometric notion of perpendicularity.Whereas perpendicular is typically followed by to when relating two lines to one another (e.g., "line A is perpendicular to line B"), [1] orthogonal is commonly used without to (e.g., "orthogonal lines A and B").
Families of Ground Zero workers have filed a mass lawsuit against the city. Andrew Carboy of the firm, Sulivan, Pappain, Block, McGrath and Cannovo said of the deaths of Cesar Borja, James Zadroga, and Mark DeBiase, "If Borja, Zadroga and now DeBiase isn't a wakeup call for the city, I don't know what will wake them."
The orthogonal complement with respect to B of an ideal is again an ideal. [ 3 ] If a given Lie algebra g {\displaystyle {\mathfrak {g}}} is a direct sum of its ideals I 1 ,..., I n , then the Killing form of g {\displaystyle {\mathfrak {g}}} is the direct sum of the Killing forms of the individual summands.
Geometry of the Galperin configuration: three orthogonal vectors (U, V, W) are rotated to the Cartesian coordinate system (E, N, Z). Common triaxial seismometers provide signal outputs in three orthogonal axes oriented towards east–west (E), north–south (N) and up-down (Z), i.e. in the Cartesian coordinate system. In contrast, the Galperin ...