transposition


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transposition

 [trans″po-zish´un]
displacement to the opposite side; in genetics, the nonreciprocal insertion of material deleted from one chromosome into another, nonhomologous chromosome.
transposition of great vessels a congenital heart defect in which the position of the chief blood vessels of the heart is reversed, so that the aorta arises from the right ventricle instead of the left and the pulmonary artery emerges from the left ventricle rather than from the right. The result is that oxygen-poor blood returning from the systemic circulation to the right side of the heart gets pumped back into the general circulation instead of being transported to the lungs, and oxygen-rich blood flows aimlessly to and from the lungs. The condition may be corrected by surgery.
Complete transposition of great arteries.

trans·po·si·tion

(trans-pō-zi'shŭn),
1. Removal from one place to another; metathesis.
2. The condition of being in the wrong place or on the wrong side of the body (for example, viscera placed opposite their normal position; such as liver on the left or apex of heart on right).
3. Movement to a new site in the genome.
4. Misplacement of teeth from normal sequence in the arch.

transposition

/trans·po·si·tion/ (trans″po-zish´un)
1. displacement of a viscus to the opposite side.
2. the operation of carrying a tissue flap from one situation to another without severing its connection entirely until it is united at its new location.
3. the exchange of position of two atoms within a molecule.

transposition of great vessels  a congenital cardiovascular malformation in which the position of the chief blood vessels of the heart is reversed. Life then depends on a crossflow of blood between the right and left sides of the heart, as through a ventricular septal defect.

transposition

(trăns′pə-zĭsh′ən)
n.
Genetics Transfer of a segment of DNA to a new position on the same or another chromosome or plasmid.

trans′po·si′tion·al adj.

transposition

Pediatrics A malposition of an organ or tissues that occurs during embryogenesis Psychiatry See Gender identity transposition Surgery Plastic surgery in which a flap of tissue is moved from one site to another and allowed sufficient time to establish a new blood supply before severing the vascular connection with the donor site. See Sensory nerve transposition.

trans·po·si·tion

(trans'pŏ-zish'ŭn)
1. Removal from one place to another; metathesis.
2. The condition of being transposed to the wrong side of the body, as in transposition of the viscera, in which the viscera are located opposite their normal position.
3. Positioning of teeth out of their normal sequence in an arch.

transposition

In genetics, the movement of a length of genetic material from one point in a DNA molecule to another.

transposition 

1. The act of converting the prescription of an ophthalmic lens from a sphere with minus cylinder form to a sphere with plus cylinder form or vice versa. Example: −3 D sphere −2 D cylinder axis 180º transposes to −5 D sphere +2 D cylinder axis 90º.
2. A surgical procedure used to correct muscle paralysis. In this procedure, adjacent muscles are transferred (transposed) to the paralysed muscle, allowing for partial movement in the field of action of the paretic muscle. There are various procedures: one in which parts of the recti muscles are sutured together (the superior and inferior recti are disinserted and joined to the lateral rectus) to correct lateral rectus palsy and improve abduction (Hummelsheim's procedure or

trans·po·si·tion

(trans'pŏ-zish'ŭn)
1. Misplacement of teeth from normal sequence in the arch.
2. Removal from one place to another; metathesis.
3. Condition of being in wrong place or on wrong side of the body.

transposition

displacement to the opposite side; in genetics, the nonreciprocal insertion of material deleted from one chromosome into another, nonhomologous chromosome.

transposition of arterial trunks
see transposition of great vessels (below).
transposition of great vessels
a congenital heart defect, in which the position of the chief blood vessels of the heart is reversed. Called also transposition of arterial trunks.
ulnar styloid transposition
a surgical procedure for correction of growth deformity resulting from premature closure of the distal ulnar physis. The distal tip of the ulna is fused to the distal radial epiphysis.
References in periodicals archive ?
Laparoscopic ovarian transposition with potential preservation of natural fertility.
5) Anterior transposition significantly decreases the potential for nerve compression/ tension during elbow flexion; however, the procedure itself may devascularize the nerve by interfering with the intraneural circulation-namely, elimination of existing multiple mesentery-like vessels, especially those originating from the inferior ulnar collateral artery.
In my view this chapter, though pointing out Balzac's great faith in the value of art and friendship, has less to do with transposition of the arts than with the importance of art to the needs of the human soul.
In the test tube, they perform the transposition reaction with gusto," says Schatz.
But the key here is the transposition still visible in the variant itself -- a transposition of phrases this way, that.
All lines in experiment 1 and the asexual lines in B, experienced hundreds of generations of selection on rates of vegetative growth; thus, if transposition occurred and produced variation in fitness, some change in transposon abundance and distribution on BamHI fragments would be expected.
The French version of an English-language text, for example, can be up to 30 percent longer than the original; as a result, major transposition problems can arise at a number of levels, notably when dealing with captions, page references, footnotes, annotations and indexation and when duplicating source text layout.
In 2016, the number of new infringement procedures relating to late transposition almost doubled (847 cases) in comparison to previous year (543 cases).
In cases where there is no communication of the national transposition measures, the Commission may propose to the Court to impose financial sanctions.
80 for partial transposition of the electricity directive and 4224 for the gas directive.
Boahene and colleagues at the Johns Hopkins University School of Medicine, Baltimore, studied 17 patients with facial paralysis who underwent a minimally invasive temporalis tendon transposition procedure between 2006 and 2008.
Apart from the occasional new transposition of an elemental name (e.