Anti-parallel Trading Protests
The term antiparallel may refer to: * Antiparallel (biochemistry), the orientation of adjacent molecules * Antiparallel lines, a congruent but opposite relative orientation of two lines in relation to another line or angle * Antiparallel vectors, a pair of vectors pointed in opposite directions * Antiparallel (electronics), the polarity of devices run in parallel See also * Antiparallelogram In geometry, an antiparallelogram is a type of list of self-intersecting polygons, self-crossing quadrilateral. Like a parallelogram, an antiparallelogram has two opposite pairs of equal-length sides, but these pairs of sides are not in general ...

Antiparallel (biochemistry)
In biochemistry, two biopolymers are antiparallel if they run parallel (geometry), parallel to each other but with opposite directionality (molecular biology), directionality (alignments). An example is the two complementarity (molecular biology), complementary strands of a DNA nucleic acid double helix, double helix, which antiparallel vectors, run in opposite directions alongside each other. Nucleic acids Nucleic acid molecules have a phosphoryl (5') end and a hydroxyl (3') end. This notation follows from IUPAC nomenclature of organic chemistry, organic chemistry nomenclature, and can be used to define the movement of enzymes such as DNA polymerases relative to the DNA strand in a non-arbitrary manner. G-quadruplexes G-quadruplexes, also known as G4 DNA are secondary structures found in nucleic acids that are rich in guanine. These structures are normally located at the telomeres (the ends of the Chromosome, chromosomes). The G-quadruplex can either be parallel or antiparallel ...
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Antiparallel Lines
In geometry, two line (geometry), lines l_1 and l_2 are antiparallel with respect to a given line m if they each make congruence (geometry), congruent angles with m in opposite Sense of rotation, senses. More generally, lines l_1 and l_2 are ''antiparallel'' with respect to another pair of lines m_1 and m_2 if they are antiparallel with respect to the angle bisector of m_1 and m_2. In any cyclic quadrilateral, any two opposite sides are antiparallel with respect to the other two sides. Relations # The line joining the feet to two altitude (triangle), altitudes of a triangle is antiparallel to the third side. (any cevians which 'see' the third side with the same angle create antiparallel lines) # The tangent to a triangle's circumcircle at a vertex is antiparallel to the opposite side. # The radius of the circumcircle at a vertex is perpendicular to all lines antiparallel to the opposite sides. Conic sections In an Cone#Elliptic cone, oblique cone, there are exactly two famil ...
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Antiparallel Vectors
In mathematics, physics, and engineering, a Euclidean vector or simply a vector (sometimes called a geometric vector or spatial vector) is a geometric object that has magnitude (or length) and direction. Euclidean vectors can be added and scaled to form a vector space. A '' vector quantity'' is a vector-valued physical quantity, including units of measurement and possibly a support, formulated as a '' directed line segment''. A vector is frequently depicted graphically as an arrow connecting an ''initial point'' ''A'' with a ''terminal point'' ''B'', and denoted by \stackrel \longrightarrow. A vector is what is needed to "carry" the point ''A'' to the point ''B''; the Latin word means 'carrier'. It was first used by 18th century astronomers investigating planetary revolution around the Sun. The magnitude of the vector is the distance between the two points, and the direction refers to the direction of displacement from ''A'' to ''B''. Many algebraic operations on real numbe ...
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Antiparallel (electronics)
In electronics, two anti-parallel or inverse-parallel devices are connected in parallel but with their polarities reversed. One example is the TRIAC, which is comparable to two thyristors connected back-to-back (in other words, reverse parallel), but on a single piece of silicon. Two LEDs can be paired this way, so that each protects the other from reverse voltage. A series string of such pairs can be connected to AC or DC power, with an appropriate resistor. Some two-color LEDs are constructed this way, with the 2 dies connected anti-parallel in one chip package. With AC, the LEDs in each pair take turns emitting light, on alternate half-cycles of supply power, greatly reducing the strobing effect to below the normal flicker fusion threshold of the human eye The human eye is a sensory organ in the visual system that reacts to light, visible light allowing eyesight. Other functions include maintaining the circadian rhythm, and Balance (ability), keeping balance. ...
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