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Rack with sample component sizes including an A/V half-rack unit. A rack unit (abbreviated U or RU) is a unit of measure defined as 1 + 3 ⁄ 4 inches (44.45 mm). [1] [2] It is most frequently used as a measurement of the overall height of 19-inch and 23-inch rack frames, as well as the height of equipment that mounts in these frames, whereby the height of the frame or equipment is expressed ...
cctld.ru. .ru is the Latin alphabet Internet country code top-level domain ( ccTLD) for Russia introduced on 7 April 1994. The Russian alphabet internationalized country code is .рф . Control of .ru is assigned to the Coordination Center for TLD RU (CC for TLD RU), the current official registry. On 1 January 2005, the former registry, the ...
Ruthenium red, [ (NH 3) 5 Ru-O-Ru (NH 3) 4 -O-Ru (NH 3) 5] 6+, is a biological stain used to stain polyanionic molecules such as pectin and nucleic acids for light microscopy and electron microscopy. [ 64] The beta-decaying isotope 106 of ruthenium is used in radiotherapy of eye tumors, mainly malignant melanomas of the uvea. [ 65]
Naturally occurring ruthenium ( 44 Ru) is composed of seven stable isotopes (of which two may in the future be found radioactive ). Additionally, 27 radioactive isotopes have been discovered. Of these radioisotopes, the most stable are 106 Ru, with a half-life of 373.59 days; 103 Ru, with a half-life of 39.26 days and 97 Ru, with a half-life of ...
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Resource Unit ( RU) is a unit in OFDMA terminology used in 802.11ax WLAN to denote a group of 78.125 kHz bandwidth subcarriers (tones) used in both DownLink (DL) and UpLink (UL) transmissions. With OFDMA, different transmit powers may be applied to different RUs. There are maximum of 9 RUs for 20 MHz bandwidth, 18 in case of 40 MHz and more in ...
Interactive map with main library buildings. TheNational Library of Russia ( NLR, Russian: Российская национальная библиотека, РНБ ), located in Saint Petersburg, is the first, [2] and one of three national public libraries in Russia. [3] The NLR is currently ranked among the world's major libraries.
RU. Internet TLD. .ru. .рф. Russia, [ b] or the Russian Federation, [ c] is a country spanning Eastern Europe and North Asia. It is the largest country in the world by area, extending across eleven time zones and sharing land borders with fourteen countries. [ d] It is the world's ninth-most populous country and Europe's most populous country.