antiparallel

(redirected from Anti-parallel)
Also found in: Dictionary, Thesaurus, Encyclopedia.

an·ti·par·al·lel

(an'tē-par'ă-lel),
1. Denoting molecules that are parallel but have opposite directional polarity, for example, the two strands of a DNA double helix.
2. Denoting the spins of two electrons occupying the same orbital area but with different spin quantum numbers.

antiparallel

(ăn′tē-păr′ə-lĕl′, ăn′tī-)
adj.
Of or relating to two adjacent molecules whose sequences of atoms or other elements run in opposite directions: antiparallel strands of DNA.

antiparallel

Of two structures that lie parallel to each other but that run in opposite directions. The best-known example of antiparalellism is that of the two strands in the DNA molecule.
References in periodicals archive ?
Figure 1(a) shows the schematic of proposed stubs loaded anti-parallel coupled-line with short-circuited port 4 and port 3 terminated by the load ZL.
Those measured results include only the fundamental and the third harmonic components, while the second harmonic component cannot be detected because the even harmonic components circulate within the loop formed by the two anti-paralleled diodes [33].
For medium-sized drives an anti-parallel arrangement is cheaper, mainly because there is no requirement for an anti-parallel field convertor and associated controls.
As can be seen in Figure 1 each bridge arm is composed of four anti-parallel diodes [S.sub.xy] (x = a,b,c; y = 1,2, 3,4) and two clamping diodes [D.sub.xy] (x = a, b, c; y = 1, 2), respectively.
The half-bridge VS-GP100TS60SFPBF, VS-GP300TD60S, and VS-GP400TD60S combine Trench PT IGBTs with HEXFRED and FRED Pt anti-parallel diodes in the INT-A-PAK package and dual INT-A-PAK package with an extremely low profile of 17 mm.
Scores of police officers, including police chiefs, have been detained in what the pro-government calls "anti-parallel structure" operationssince a corruption scandal erupted on Dec.
[D.sub.S1] and [D.sub.S2] are the anti-parallel diodes of [S.sub.1] and [S.sub.2], respectively.
Two diodes are anti-parallel arranged in the x direction in each unit cell.
In order to suppress the spurious passbands, many methods has been presented such as methods using the stepped-impedance resonators and grounded-step-impedance resonators [11, 18, 20, 23, 25, 26], fractal-shaped micro-strip [12], multi-order resonator [13], T-stub/DGS [14], antisymmetric modied anti-parallel coupled-lines [15, 19, 21], branch stubs co-via structure [22], DGS and Spur-line Coupling Structures [24], etc..
The most popular power sources used for supplying ESP sections are those which are supplied from two phases, with two thyristors connected as anti-parallel which, by controlling the ignition angle, modify the effective voltage in the transformer's bootstrap primary and directly the voltage on the ESP's section.