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Embraer E-Jet E2 Family
The Embraer E-Jet E2 family is a series of four-abreast narrow-body airliners designed and produced by the Brazilian aircraft manufacturer Embraer. The twinjet is an incremental development of the original E-Jet family, adopting the more fuel-efficient Pratt & Whitney PW1900G, a geared turbofan engine. The aircraft family comprises three variants that share the same fuselage cross-section with different lengths and feature three different redesigned wings, fly-by-wire controls with new avionics, and an updated cabin. The variants offer maximum take-off weights from , and cover a range of . The program was launched at the Paris Air Show in June 2013. The first variant, the E190-E2, made its maiden flight on 23 May 2016 and flight testing proceeded to schedule with little issue. It received certification on 28 February 2018 before entering service with launch customer Widerøe on 24 April. Certification of the larger E195-E2 was received during April 2019; Azul Brazilian Air ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
E2 Series Shinkansen
The is a Japanese high-speed Shinkansen train type operated by East Japan Railway Company (JR East) on the Tohoku Shinkansen high-speed lines in Japan since 1997. They are formed in 8- and 10-car sets. The 8-car sets were used on the Hokuriku Shinkansen, and the 10-car sets are on Tohoku Shinkansen services. The 10-car sets can be coupled to E3 series sets using couplers hidden behind retracting nose doors. They operate at a maximum speed of on the Tohoku Shinkansen. A total of 502 vehicles (14 8-car "N" sets and 39 10-car "J" sets) were built between 1997 and 2010, with the first withdrawals commencing in late 2013. Operations Tohoku Shinkansen * '' Yamabiko'' * '' Nasuno'' Past operations Tohoku Shinkansen * Hayate (1 December 2002 - 16 March 2019) Hokuriku Shinkansen * '' Asama'' (1 October 1997 - 31 March 2017) Joetsu Shinkansen * ''Asahi'' * '' Toki'' * '' Tanigawa'' Variants * E2 series 8-car "N" sets * E2' series 10-car "J" sets * E2-1000 series 10-car ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ubiquitin-conjugating Enzyme
Ubiquitin-conjugating enzymes, also known as E2 enzymes and more rarely as ''ubiquitin-carrier enzymes'', perform the second step in the ubiquitination reaction that targets a protein for degradation via the proteasome. The ubiquitination process covalently attaches ubiquitin, a short protein of 76 amino acids, to a lysine residue on the target protein. Once a protein has been tagged with one ubiquitin molecule, additional rounds of ubiquitination form a polyubiquitin chain that is recognized by the proteasome's 19S regulatory particle, triggering the adenosine triphosphate, ATP-dependent denaturation (biochemistry), unfolding of the target protein that allows passage into the proteasome's 20S core particle, where proteases degrade the target into short peptide fragments for recycling by the cell (biology), cell. Relationships A ubiquitin-activating enzyme, or E1, first activates the ubiquitin by covalently attaching the molecule to its active site cysteine residue. The activated u ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Everything2
Everything2 (styled Everything2 or E2 for short) is a collaborative online community consisting of a database of interlinked user-submitted written material. E2 is moderated for quality, but has no formal policy on subject matter. Writing on E2 covers a wide range of topics and genres, including encyclopedic articles, diary entries (known as "daylogs"), poetry, humor, and fiction. History The predecessor of E2 was a similar database called Everything (later labeled "Everything1" or "E1") which was started around March 1998 by Nathan Oostendorp and was initially closely aligned with and promoted by the technology-related news website Slashdot (by virtue of various key principals having attended the Holland Christian High School), even sharing (at the time) some administrators. The Everything2 software offered vastly more features, and the Everything1 data was twice incorporated into E2: once on November 13, 1999, and again in January 2000. The Everything2 server used to be ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Elimination Reaction
An elimination reaction is a type of organic reaction in which two substituents are removed from a molecule in either a one- or two-step mechanism. The one-step mechanism is known as the E2 reaction, and the two-step mechanism is known as the E1 reaction. The numbers refer not to the number of steps in the mechanism, but rather to the kinetics of the reaction: E2 is bimolecular (second-order) while E1 is unimolecular (first-order). In cases where the molecule is able to stabilize an anion but possesses a poor leaving group, a third type of reaction, E1cB-elimination reaction, E1CB, exists. Finally, the pyrolysis of xanthate and acetate esters proceed through an "internal" elimination mechanism, the Ei mechanism, Ei mechanism. E2 mechanism The E2 mechanism, where E2 stands for bimolecular elimination, involves a one-step mechanism in which ''carbon-hydrogen'' and ''carbon-halogen'' bonds break to form a double bond (''C=C molecular geometry, Pi bond''). The specifics of the re ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Haplogroup E2 (Y-DNA)
Haplogroup E-M75 is a human Y-chromosome DNA haplogroup. Along with haplogroup E-P147, it is one of the two main branches of the older haplogroup E-M96. Ancient DNA Within Africa Kenya At Prettejohn's Gully, in Nakuru County, Kenya, there were two pastoralists of the early pastoral period; one carried haplogroups E2 (xE2b)/E-M75 and K1a, and another carried haplogroup L3f1b. At Ilkek Mounds, in Nakuru County, Kenya, a pastoralist of the Pastoral Iron Age carried haplogroups E2 (xE2b)/E-M75 and L0f2a. At Kisima Farm/C4, in Laikipia County, Kenya, a pastoralist of the Pastoral Iron Age, carried haplogroups E2 (xE2b)/E-M75 and L3h1a1. Outside of Africa United States of America At an Anson Street burial site, in Charleston, South Carolina, there were 18 African Americans found who were dated to the 18th century CE. Coosaw, who was of West African and Native American ancestry, carried haplogroups E2b1a-CTS2400 and A2. Distribution Sorted frequency table of E-M75+ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prostaglandin E2
Prostaglandin E2 (PGE2), also known as dinoprostone, is a naturally occurring prostaglandin with oxytocic properties that is used as a medication. Dinoprostone is used in labor induction, bleeding after delivery, termination of pregnancy, and in newborn babies to keep the ductus arteriosus open. In babies it is used in those with congenital heart defects until surgery can be carried out. It is also used to manage gestational trophoblastic disease. It may be used within the vagina or by injection into a vein. PGE2 synthesis within the body begins with the activation of arachidonic acid (AA) by the enzyme phospholipase A2. Once activated, AA is oxygenated by cyclooxygenase (COX) enzymes to form prostaglandin endoperoxides. Specifically, prostaglandin G2 (PGG2) is modified by the peroxidase moiety of the COX enzyme to produce prostaglandin H2 (PGH2) which is then converted to PGE2. Common side effects of PGE2 include nausea, vomiting, diarrhea, fever, and excessi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dihydrolipoyl Transacetylase
Dihydrolipoyl transacetylase (or dihydrolipoamide acetyltransferase) is an enzyme component of the multienzyme pyruvate dehydrogenase complex. The pyruvate dehydrogenase complex is responsible for the pyruvate decarboxylation step that links glycolysis to the citric acid cycle. This involves the transformation of pyruvate from glycolysis into acetyl-CoA which is then used in the citric acid cycle to carry out cellular respiration. There are three different enzyme components in the pyruvate dehydrogenase complex. Pyruvate dehydrogenase (EC 1.2.4.1) is responsible for the oxidation of pyruvate, dihydrolipoyl transacetylase (this enzyme; EC 2.3.1.12) transfers the acetyl group to coenzyme A (CoA), and dihydrolipoyl dehydrogenase (EC 1.8.1.4) regenerates the lipoamide. Because dihydrolipoyl transacetylase is the second of the three enzyme components participating in the reaction mechanism for conversion of pyruvate into acetyl CoA, it is sometimes referred to as E2. In humans, dihydr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Estradiol
Estradiol (E2), also called oestrogen, oestradiol, is an estrogen steroid hormone and the major female sex hormone. It is involved in the regulation of female reproductive cycles such as estrous and menstrual cycles. Estradiol is responsible for the development of female secondary sexual characteristics such as the breasts, widening of the hips and a female pattern of fat distribution. It is also important in the development and maintenance of female reproductive tissues such as the mammary glands, uterus and vagina during puberty, adulthood and pregnancy. It also has important effects in many other tissues including bone, fat, skin, liver, and the brain. Though estradiol levels in males are much lower than in females, estradiol has important roles in males as well. Apart from humans and other mammals, estradiol is also found in most vertebrates and crustaceans, insects, fish, and other animal species. Estradiol is produced within the follicles of the ovaries and in oth ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tungsten E2
The Tungsten series was Palm, Inc.'s line of business-class Palm OS-based PDAs. Details The Tungsten series was introduced in October 2002, created as a "prosumer" line priced at $199 to $300 to compete with the popular Sony Clie and Windows Mobile PDAs. The first device in the line is the Tungsten T, making it the first Palm PDA to be labeled with a letter rather than a number and to run Palm OS 5. All of the Tungsten PDAs have a few attributes in common: * 65,536 color LCD touch screen with a minimum 320 x 320 pixel resolution * metal or metal-toned enclosure * available flip cover to protect the screen * Secure Digital (SD) card slot with SDIO for memory cards and accessories * no built-in camera All models except the Tungsten C, W, and E have built-in Bluetooth wireless capabilities, while the Tungsten C and TX feature built-in Wi-Fi connectivity. Furthermore, by using the optional Palm Wi-Fi Secure_Digital#SDIO_cards Card accessory, the T3, T5, and E2 can also gain ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Northrop Grumman E-2 Hawkeye
The Northrop Grumman E-2 Hawkeye is an American all-weather, carrier-capable tactical airborne early warning (AEW) aircraft. This twin-turboprop aircraft was designed and developed during the late 1950s and early 1960s by the Grumman Aircraft Company for the United States Navy as a replacement for the earlier, piston-engined E-1 Tracer, which was rapidly becoming obsolete. The aircraft's performance has been upgraded with the E-2B and E-2C versions, where most of the changes were made to the radar and radio communications due to advances in electronic integrated circuits and other electronics. The fourth major version of the Hawkeye is the E-2D, which first flew in 2007. The E-2 was the first aircraft designed specifically for AEW, as opposed to a modification of an existing airframe, such as the Boeing E-3 Sentry. Variants of the Hawkeye have been in continuous production since 1960, giving it the longest production run of any carrier-based aircraft. The E-2 also received ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
E2 (cipher)
In cryptography, E2 is a symmetric block cipher which was created in 1998 by NTT and submitted to the AES competition. Like other AES candidates, E2 operates on blocks of 128 bits, using a key of 128, 192, or 256 bits. It uses a 12-round Feistel network. E2 has an input transformation and output transformation that both use modular multiplication, but the round function itself consists only of XORs and S-box lookups. The single 8×8-bit S-box is constructed from the composition of an affine transformation with the discrete exponentiation x127 over the finite field GF(28). NTT adopted many of E2's special characteristics in Camellia ''Camellia'' (pronounced or ) is a genus of flowering plants in the family Theaceae. They are found in tropical and subtropical areas in East Asia, eastern and South Asia, southern Asia, from the Himalayas east to Japan and Indonesia. There are ..., which has essentially replaced E2. References * {{Cryptography navbox , block Feistel ci ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
