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Add the amine to sodium hydroxide and di-tert-butyl dicarbonate in water and THF at 0 °C then warm to ambient temperature. [ 13 ] Heating a mixture of the amine to be protected and di- tert -butyl dicarbonate in a biphasic mixture of chloroform and aqueous sodium bicarbonate at reflux for 90 minutes.
The Warrior incorporates several design features in keeping with the UK's battlefield experience. In particular, there are no firing ports in the hull, in line with British thinking that the role of the armoured personnel carrier/infantry fighting vehicle (APC/IFV) is to carry troops under protection to the objective and then give firepower support when they have disembarked.
NATO AEP-55 STANAG 4569 is a NATO Standardization Agreement covering the standards for the "Protection Levels for Occupants of Logistic and Light Armored Vehicles". [ 1 ] The standard covers strikes from kinetic energy , artillery and IED blasts .
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The Spiral 3.5 Electronic Data Manager (EDM) is a light, rugged, sunlight-readable touch-screen computer operating on Windows-based software. [4] The EDM is in the form of a kneeboard and provides the aviator with an Aviation Mission Planning System interface, enhanced situational awareness, GPS moving map capabilities, and enables the aircrew to quickly plan and safely execute missions and ...
On 4 March 2007, US Marines killed at least 12 civilians and injured 33 in Shinwar district, Nangarhar, [183] in a response to a bomb ambush. The event became known as the " Shinwar massacre ." [ 184 ] The 120 member Marine unit responsible for the attack were ordered to leave the country because the incident damaged the unit's relations with ...
The VPAM scale as of 2009 runs from 1 to 14, with 1-5 being soft armor, and 6-14 being hard armor. [1] Tested armor must withstand three hits, spaced 120 mm (4.7 inches) apart, of the designated test threat with no more than 25 mm (0.98 inches) of back-face deformation in order to pass.
Polyethylene glycol is also commonly used as a polar stationary phase for gas chromatography, as well as a heat transfer fluid in electronic testers. PEG is frequently used to preserve waterlogged wood and other organic artifacts that have been salvaged from underwater archaeological contexts, as was the case with the warship Vasa in Stockholm ...