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Pincer Ligand Synthesis
Pincer may refer to: *Pincers (tool) *Pincer (biology), part of an animal *Pincer ligand, a terdentate, often planar molecule that tightly binds a variety of metal ions *Pincer (Go), a move in the game of Go *"Pincers!", an episode of the TV series ''Pocoyo'' See also *Pincer movement, military manoeuvre *Pincer nail (medicine) {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pincers (tool)
Pincers are a hand tool used in many situations where a mechanical advantage is required to pinch, cutting, cut or pull an object. Pincers are first-class levers, but differ from pliers in that the concentration of force is either to a point, or to an edge perpendicular to the length of the tool. This allows pincers to be brought close to a surface, which is often required when working with Nail (fastener), nails. Pincers are primarily used for removing objects (typically Nail (fastener), nails) out of a material that they have been previously applied to. Carpenter's pincers are particularly suited to these tasks. Sharpened pincers are also used to cut away natural calluses, also called Chestnut (horse anatomy), chestnuts, from a horses body. Further use of pincers is the trimming of the edges of horses hoofs. If the pincers have perpendicular cutting edges, the pincers are often called end-nippers or end-cutters. They're often used in jewelry making, for trimming flat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pincer (biology)
A chela ()also called a claw, nipper, or pinceris a pincer-shaped organ at the end of certain limbs of some arthropods. The name comes from Ancient Greek , through Neo-Latin '. The plural form is chelae. Legs bearing a chela are called chelipeds. Another name is ''claw'' because most chelae are curved and have a sharp point like a claw. Chelae can be present at the tips of arthropod legs as well as their pedipalps. Chelae are distinct from spider chelicerae in that they do not contain venomous glands and cannot distribute venom. Uses Chelae have a wide variety of uses, but most commonly they are used for handling their prey and for defense. These uses are often reflected in the morphology of the chelae. For instance, some species, such as the members of the families Ocypodidae and Alpheidae show asymmetry between their paired claws. Possessing one enlarged chela used for defensive and courtship purposes and a smaller chela for shearing and feeding. For some species, this asymm ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pincer Ligand
In chemistry, a transition metal pincer complex is a type of coordination complex with a pincer ligand. Pincer ligands are chelating agents that binds tightly to three adjacent coplanar sites in a meridional configuration. The inflexibility of the pincer-metal interaction confers high thermal stability to the resulting complexes. This stability is in part ascribed to the constrained geometry of the pincer, which inhibits cyclometallation of the organic substituents on the donor sites at each end. In the absence of this effect, cyclometallation is often a significant deactivation process for complexes, in particular limiting their ability to effect C-H bond activation. The organic substituents also define a hydrophobic pocket around the reactive coordination site. Stoichiometric and catalytic applications of pincer complexes have been studied at an accelerating pace since the mid-1970s. Most pincer ligands contain phosphines.Jensen, C. M., "Iridium PCP pincer complexes: high ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pincer (Go)
Players of the game of Go often use jargon to describe situations on the board and surrounding the game. Such technical terms are likely to be encountered in books and articles about Go in English as well as other languages. Many of these terms have been borrowed from Japanese, mostly when no short equivalent English term could be found. This article gives an overview of the most important terms. Use of Japanese terms Although Go originated in China, the current English and Western technical vocabulary borrows a high proportion of terms from the Japanese language because it was through Japan that the West was introduced to Go. Many of these terms are from a jargon used for technical Go writing and are to some extent specially developed for Go journalism. Some authors of English-language Go materials avoid use of Japanese technical terms, and the way they are applied can differ in subtle ways from the original meanings. A few Korean-language terms have come into use (e.g., ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pocoyo
''Pocoyo'' ( in Spanish and stylised as ''POCOYO'') is an animated interactive preschool comedy television series created by David Cantolla, Luis Gallego, and Guillermo García Carsí, that premiered on 7 January 2005 on La 2. The series was produced by the Spanish animation company Zinkia Entertainment, with the first two series were co-productions with Granada Kids, and the first series was a co-production of Cosgrove Hall Films, both in the United Kingdom. In 2019, ''Pocoyo'' was a co-production of Koyi Talent. Four series have been produced, each consisting of 52 seven-minute episodes along with 60 specials produced for YouTube. The show is currently in its fifth series. English actor and comedian Stephen Fry narrates the English-language version of the first two series of the show, while Stephen Hughes began narrating starting the third series, titled ''Let's Go Pocoyo''. José María del Río narrates the Castilian Spanish version of the show. A half-hour special f ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pincer Movement
The pincer movement, or double envelopment, is a maneuver warfare, military maneuver in which forces simultaneously attack both flanking maneuver, flanks (sides) of an enemy Military organization, formation. This classic maneuver has been important throughout the history of warfare. The pincer movement typically occurs when opposing forces advance towards the center of an army that responds by moving its outside forces to the enemy's flanks to surround it. At the same time, a second layer of pincers may attack the more distant flanks to keep reinforcements from the target units. Description A full pincer movement leads to the attacking army facing the enemy in front, on both flanks, and in the rear. If attacking pincers link up in the enemy's rear, the enemy is encirclement, encircled. Such battles often end in surrender or destruction of the enemy force, but the encircled force can try to breakout (military), break out. They can attack the encirclement from the inside to ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
