|
R21 , a Soviet turbojet engine
{{Letter-NumberCombDisambig ...
R21, R-21 or R.21 may refer to: Military * R-21 (missile), a Soviet submarine-launched ballistic missile * , an aircraft carrier of the Royal Australian Navy * , a destroyer of the Royal Navy * , a submarine of the United States Navy * Roads * R-21 regional road (Montenegro) * R21 (South Africa) * R21 highway (Russia) Science and medicine * Dichlorofluoromethane, a refrigerant * R21: Harmful in contact with skin, a risk phrase * R21/Matrix-M a Malaria vaccine * Small nucleolar RNA R21 Other uses * R21 (New York City Subway car) * Kwanyama dialect * Renault 21, a French family car * Tumansky R-21 The Tumansky R-21 was a Soviet turbojet engine of the 1960s. Used for development only, the project was canceled. Design and development The Tumansky R-21 was developed at Tushino motor plant (part of OKB-300), headed by Nikolai Georgievich M ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
R21 (South Africa)
The R21 / P157 is a major north–south provincial route (South Africa), provincial route (with a freeway portion designated as a National road (South Africa), National Road) in eastern Gauteng Province, South Africa. Built in the early 1970s, it remains one of two freeways (the other being the N1) linking Pretoria with Johannesburg, via the R24. As the eastern of the two freeways, it links the Pretoria city centre with OR Tambo International Airport, the N12 freeway, and Boksburg. Between the Solomon Mahlangu Drive on-ramp in Monument Park, Gauteng, Monument Park, Pretoria, and the N12 (South Africa), N12 in Boksburg, the R21 / P157 is an 8 lane highway and motorway (freeway), with 4 lanes in each direction. It has off-ramps leading to Irene, Gauteng, Irene, Olifantsfontein, Benoni, Gauteng, Benoni, and Kempton Park, Gauteng, Kempton Park, including a partial offramp to Atlas Road. The route intersects the N1 (South Africa), N1 Highway (Pretoria Bypass, Eastern Pretoria Bypass; Da ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
R21 (New York City Subway Car)
The R21 was a New York City Subway car built by St. Louis Car Company from 1956 to 1957 for the IRT A Division. A total of 250 cars were built, arranged as single units. Two versions were manufactured: Westinghouse (WH)-powered cars and General Electric (GE)-powered cars. The first R21s entered service on November 7, 1956. The R21s were replaced by the R62As in the 1980s, and the final train of R21s ran on December 30, 1987. Four R21 cars were preserved, while the rest were scrapped. Description The R21s were numbered 7050–7299. They were similar to the R17s, except that they featured windows of a slightly different design. The cab doors were mounted the same way as the newer R62 and R62A subway cars; however, this was not repeated on the next order for R22 subway cars, which reverted to the normally mounted cab doors. There were two versions of the R21: Westinghouse Electric-powered cars (7050–7174) and General Electric-powered cars (7175–7299). History T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Small Nucleolar RNA R21
In molecular biology, Small nucleolar RNA R21 is a non-coding RNA (ncRNA) molecule which functions in the modification of other small nuclear RNAs (snRNAs). This type of modifying RNA is usually located in the nucleolus of the eukaryotic cell which is a major site of snRNA biogenesis. It is known as a small nucleolar RNA (snoRNA) and also often referred to as a guide RNA. snoRNA R21 belongs to the C/D box class of snoRNAs which contain the conserved sequence motifs known as the C box (UGAUGA) and the D box (CUGA). Most of the members of the box C/D family function in directing site-specific 2'-O-methylation In the chemical sciences, methylation denotes the addition of a methyl group on a substrate, or the substitution of an atom (or group) by a methyl group. Methylation is a form of alkylation, with a methyl group replacing a hydrogen atom. These t ... of substrate RNAs. Plant snoRNA R21 was identified in a screen of ''Arabidopsis thaliana'' . References External links * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
R21/Matrix-M
A malaria vaccine is a vaccine that is used to prevent malaria. The only approved use of a vaccine outside the EU, as of 2022, is RTS,S, known by the brand name ''Mosquirix''. In October 2021, the WHO for the first time recommended the large-scale use of a malaria vaccine for children living in areas with moderate-to-high malaria transmission. Four injections are required for full protection. Research continues with other malaria vaccines. The most effective malaria vaccine is R21/Matrix-M, with a 77% efficacy rate shown in initial trials and significantly higher antibody levels than with the RTS,S vaccine. It is the first vaccine that meets the World Health Organization's (WHO) goal of a malaria vaccine with at least 75% efficacy. Approved vaccines RTS,S RTS,S, developed by PATH Malaria Vaccine Initiative (MVI) and GlaxoSmithKline (GSK) with support from the Bill and Melinda Gates Foundation, is the most recently developed recombinant vaccine. It consists of the ''P. falci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Renault 21
The Renault 21 is a large family car produced by French automaker Renault between 1986 and 1994. It was also sold in North America initially through American Motors dealers as the Renault Medallion and later through Jeep-Eagle dealers as the Eagle Medallion. A total of 2,096,000 units were produced. The Renault 21 sedan was launched in the beginning of 1986, as the successor to the successful Renault 18, and this was followed a few months later by the seven seater station wagon, the R21 Nevada, marketed as the Savanna in the United Kingdom. In 1987, ''What Car?'' awarded the Renault 21 GTS ''Best Family Saloon''. The Renault 21 Savanna was awarded ''Car of the Year'', as well as ''Best Family Estate''. Design Unusually, the Renault 21 was offered with disparate engine configurations. The 1.7 litre version featured a transverse engine and transmission, but Renault had no gearbox suitable for a more powerful transverse engine: accordingly, faster versions featured longitudinally ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
R21 Highway (Russia)
The R21 highway (in Cyrillic Р21), also known as the Kola Motorway, is a major highway in Russia, running from Saint Petersburg to Murmansk. The highway is part of European route E105 and is the main transportation route by road in the Republic of Karelia and the Murmansk Oblast. Its length is 1592 kilometers. Before 2018, the R21 was designated as M18. Route The R21 highway runs from Saint Petersburg, south of Lake Ladoga to Petrozavodsk, Kondopoga, Medvezhyegorsk, Segezha, Kem, Loukhi, Kandalaksha, Polyarnye Zori, Monchegorsk, Olenegorsk, Kola and ends in Severomorsk. It passes the Arctic circle a couple of kilometers south of the border of Karelia and the Murmansk oblast, north of Loukhi. Landscape In the Republic of Karelia, the landscape through which the R21 runs is mainly forest (birches), rivers and lakes. In the Murmansk Oblast, the highway runs for the most part through the Kola Peninsula, a severely polluted area. The landscape here is more open and consists partly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
R-21 (missile)
The R-21 (russian: Р-21; NATO: SS-N-5 'Sark/Serb'; GRAU: 4K55) was a submarine-launched ballistic missile in service with the Soviet Union between 1963 and 1989. It was the first Soviet nuclear missile that could be launched from a submerged submarine, and also had twice the range of earlier missiles. It replaced the R-11FM and R-13 (SS-N-4) on many Golf and Hotel-class submarines, and was in turn superseded by the R-27 (SS-N-6 'Serb') missile carried by Yankee-class submarines. Development Development of the R-15 and R-21 was initially assigned to Mikhail Yangel's Yuzhnoye Design Office (OKB-586) on 20 March 1958. The project was transferred to Viktor Makeyev's SKB-385 on 17 March 1959. It was intended for the ''Golf''-class submarines (Project 629B); the complete missile system was called the D-4 weapon complex. The 4th Research Institute had been conducting trials of underwater missile launch systems since 1955 with modified Scuds but the first successful launch was in ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
R-21 Regional Road (Montenegro)
R-21 regional road ( cnr, Regionalni put R-21) is a Montenegrin roadway. This road serves as a shortest connection between Šavnik and Kolašin. History In 1975, a tunnel under the Semolj was started. It would have been 1750 m long, and 420 m were excavated before the work was stopped the same year. In January 2016, the Ministry of Transport and Maritime Affairs published bylaw on categorisation of state roads. With new categorisation, part of R-18 regional road between Tušina The Tušina ( sr-cyrl, Тушина) is one of the five rivers in the municipality of Šavnik, Montenegro ) , image_map = Europe-Montenegro.svg , map_caption = , image_map2 = , capital ... and Mioska was renamed as R-21 regional road. Major intersections References {{Highways in Montenegro R-21 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dichlorofluoromethane
Dichlorofluoromethane or Freon 21 or R 21 is a halomethane or hydrochlorofluorocarbon with the formula CHCl2F. It is a colorless and odorless gas. It is produced by fluorination of chloroform using a catalyst such as antimony trifluoride: :CHCl3 + HF → CHCl2F + HCl Uses Dichlorofluoromethane was used as a propellant and refrigerant. Due to its role in ozone depletion, dichlorofluoromethane has been largely phased out. It has ozone depletion potential 0.04. Production and consumption has been since 2004 reduced to 15% of level from 1989 and it is to be phased out in 2015 according to Montreal Protocol. Pyrolysis of a mixture of dichlorofluoromethane and chlorofluoromethane gives hexafluorobenzene: :3 CHCl2F + 3 CH2ClF → C6F6 + 9 HCl Additional physical data Its critical point is at 178.5 °C (451.7K) and 5.17MPa (51.7bar). At temperatures from 5K to 105K, it has one phase in the space group In mathematics, physics and chemistry, a space group is the symmetry gro ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Harmful In Contact With Skin
Harmful is a rock band from Frankfurt, Germany, founded in 1992 and frequently compared to early Helmet and more occasionally to Blackmail.sefor an overview of reviewer opinions The band has released eight albums to date, the first two and the last three on independent labels ( BluNoise, Steamhammer and Nois-o-lution), the third (which was produced by Dave Sardy, who also produced the latest album ''Cause'') and fourth via BMG. 2007 saw the release of Harmful's seventh album, aptly titled ''7'', produced by Billy Gould, former member of Faith No More. Gould has subsequently joined the band as a fourth member and also took part in the tour supporting the album in early 2007. In the past, Harmful has toured with bands like Slayer, Machine Head, Clutch, Paradise Lost, Therapy?, LaFaro, and Helmet. Discography * 1995: ''Harmful'' ( BluNoise) * 1997: ''Apoplexy.136'' (BluNoise) * 2000: ''Counterbalance'' (Firestarter/BMG) * 2001: ''Wromantic'' (Firestarter/BMG) * 2003: ''Sanguine'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Kwanyama Dialect
Kwanyama or Cuanhama is a national language of Angola and Namibia. It is a standardized dialect of the Ovambo language, and is mutually intelligible with Oshindonga, the other Ovambo dialect with a standard written form. The entire Christian Bible has been translated into Kwanyama and was first published in 1974 under the name ''Ombibeli'' by the South African Bible Society. Jehovah’s Witnesses released the modern translation of the new testament The New Testament grc, Ἡ Καινὴ Διαθήκη, transl. ; la, Novum Testamentum. (NT) is the second division of the Christian biblical canon. It discusses the teachings and person of Jesus, as well as events in first-century Christ ..., the ''New World Translation of the Christian Greek Scriptures'' in Kwanyama in 2019, both printed anelectronic online version Phonology /t/ and /d/ are dentalized when followed by a front vowel /i/. An /s/ sound can only occur in loanwords. References Bibliography * * * Further ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
.jpg "Click for more on -> R21 (New York City Subway Car)")
