what is the definition of inversion  in science
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Inversion Inversion, in chemistry, the spatial rearrangement of atoms or groups of atoms in a dissymmetric molecule, giving rise to a product with a molecular configuration that is a mirror image of that of the original molecule. The reaction is usually one in which an atom or a group of atoms in the molecule is replaced by another atom or group. The phenomenon of inversion is sometimes known as Walden inversion, after the German chemist Paul Walden, who discovered it in 1895.
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Definitions &Translations Torsion. In solid mechanics, torsion is the twisting of an object due to an applied torque, therefore is expressed in N·m or ft·lbf. In sections perpendicular to the torque axis, the resultant shear stress in this section is perpendicular to the radius.
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Inversion Tables & Herniated Discs Inversion Therapy. Inversion therapy is a method of spinal traction, or decompression, that involves you being in a head-down position. The theory behind inversion therapy is to relieve the pressure at the nerve roots and discs in your spine by taking away the pressure created by gravity. This also opens up the intervertebral space, again, as a way to relieve pressure in your spine.
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inversion with reference to the foot: tilting of the sole inwards. inversion injury a common injury to the ankle joint in sport. Inversion of the foot usually occurs as a result of 'going over' on the ankle when the foot strikes the ground, especially if uneven or if the person is off balance. Results in damage to the lateral ligament complex, with bleeding, swelling and pain.
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- (surface-based or elevated) : a layer of the atmosphere in which air temperature increases with height. When the layer's base is at the surface, the layer is called a surface-based temperature inversion; when the base of the layer is above the surface, the layer is called an elevated temperature inversion. You can either type in the word you are looking for in the box below or browse by letter. Search: Browse by letter:
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"Passengers on ""The Love Boat""" Mary-Louise Parker (born August 2, 1964) is an American actress and author.
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Definitions &Translations ) opposite in effect, of one operation that annuls the effect of another, as subtraction to addition, &c.—n. an inverted state, a direct opposite.—adv. Inverse′ly.— n. Inver′sion, the act of inverting: the state of being inverted: a change of order or position.—adj. Inver′sive.
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- Eversion is the movement of the sole of the foot away from the center line of the body. Inversion is the opposite, the movement of the sole of the foot toward the center line. Forced inversion is a common cause of ankle sprains.
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- Overview. In inversion therapy, you lie on what is called an inversion table and hang either partially or completely upside down, promoting traction on the spine. Centuries ago, Hippocrates -- known as the father of medicine -- used this type of treatment by hanging patients upside down on ladders.
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- In physics, another definition of a dipole is an antenna that is a horizontal metal rod with a wire connected to its center. 1  Article. 2  Article. 3  Article. 4  Article. 5  Article. 6  Article. 7  Article. 8  Article.
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- An inversion is a chromosome rearrangement in which a segment of a chromosome is reversed end to end.An inversion occurs when a single chromosome undergoes breakage and rearrangement within itself. Inversions are of two types: paracentric and pericentric.Paracentric inversions do not include the centromere and both breaks occur in one arm of the chromosome.Pericentric inversions include the centromere and there is a break point in each arm.aracentric inversions do not include the centromere and both breaks occur in one arm of the chromosome. Pericentric inversions include the centromere and there is a break point in each arm.
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Precession In astronomy, precession refers to any of several slow changes in an astronomical body's rotational or orbital parameters. An important example is the steady change in the orientation of the axis of rotation of the Earth, known as the precession of the equinoxes.
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Temperature Inversions If there had been an inversion present the temperature would have been lower in Denver than areas in the foothills. So, an inversion layer is the warm layer of air above the cooler lower levels. This has important aspect here along the Front Range both in the winter and in the summer.
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CHROMOSOMAL MUTATION inversion - (genetics) a kind of mutation in which the order of the genes in a section of a chromosome is reversed. genetic science, genetics - the branch of biology that studies heredity and variation in organisms.
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Inversion (meteorology) Temperature inversion stops atmospheric convection (which is normally present) from happening in the affected area and can lead to the air becoming stiller and murky from the collection of dust and pollutants that are no longer able to be lifted from the surface. 1  This can become a problem in cities where many pollutants exist.
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SN2 - Second-order Nucleophilic Substitution Inversion. If the absolute configuration of the reaction center is inverted-that is, if the attacking nucleophile has a completely opposite spatial position in relation to the other substituents in the product, as the leaving group has in the substrate-this is called inversion of configuration, or inversion.he stereochemical result of a reaction is the consequence of its reaction mechanism. Therefore, by investigating the stereochemistry of the starting products and products, important details about a reaction mechanism and, in particular, the structure of its transition state are often obtained.
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- INVERSION RECOVERY (IR) - an imaging sequence that involves successive 180 and 90 pulses, after which a heavily T1-weighted signal is obtained. The inversion recovery sequence is specified in terms of three parameters, inversion time (TI), repetition time (TR) and echo time (TE).
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- inversionnoun [ C or U ] uk ​ /ɪnˈvɜː.ʒən/ us ​ /ɪnˈvɝː.ʒən/. › a situation in which something is changed so that it is the opposite of what it was before, or in which something is turned upside down: Her account of the case was an inversion of the facts (= it said the opposite of what really happened). › specialized medical a situation in which an organ, or part of an organ, is turned inside out. Thesaurus: synonyms and related words. Opposites. antithesis.
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- When hydrolyzed, sucrose yields equimolar amounts of glucose and fructose, a m … ixture that turns the polarized light to the left (levorotatory). So, hydrolysis of sucrose inverts the polarized light plane from right to left and the reaction is called inversion.
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inversion Definition of inversion for English Language Learners. : 1  a change in the position, order, or relationship of things so that they are the opposite of what they had been. 2  weather : a condition in which air close to the ground is cooler than the air above it.
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Chromosomal inversion An inversion loop in the A arm of a chromosome from an Axarus species midge. An inversion is a chromosome rearrangement in which a segment of a chromosome is reversed end to end. An inversion occurs when a single chromosome undergoes breakage and rearrangement within itself.Inversions are of two types: paracentric and pericentric.Paracentric inversions do not include the centromere and both breaks occur in one arm of the chromosome.Pericentric inversions include the centromere and there is a break point in each arm.aracentric inversions do not include the centromere and both breaks occur in one arm of the chromosome. Pericentric inversions include the centromere and there is a break point in each arm.
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Inversion (meteorology) In meteorology, an inversion is a deviation from the normal change of an atmospheric property with altitude. It almost always refers to a temperature inversion, i.e. an increase in temperature with height, or to the layer (inversion layer) within which such an increase occurs. An inversion can lead to pollution such as smog being trapped close to the ground, with possible adverse effects on health.
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- In a temperature inversion, the temperature increases as altitude increases, up to the level of air that is causing the … inversion.he relationship between atmospheric pressure and altitude is the higher you go, the lesser the atmospheric pressure becomes. if the air above you is less, then there is less … weight being pressed upon the air you are on. anonymous boy from small heath school y8 2011. 5 people found this useful.
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Precession Precession is a change in the orientation of the rotational axis of a rotating body. In an appropriate reference frame it can be defined as a change in the first Euler angle, whereas the third Euler angle defines the rotation itself.
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inversion pericentric inversion. an inversion in a chromosome in which the centromere is included in the inverted segment. teat inversion. the tip is invaginated so that the orifice is closed by the act of sucking.
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- pollution from inversion episodes are related to the risk of having to visit the health care providers due to an injury with external causes. We nd no evidence of a correlation between inversion episodes and injuries due to external causes. Our study contributes to the literature on air pollution and health in several ways. First,