Construct · 3 fields · 3 citations

Where does duplex collide?

One name. Different field. Different construct. One map.

● jingle · one word, three constructs Nearest construct by meaning·not indexed
duplex3 CONSTRUCTSNucleic-acid duplexWATSON-CRICK · DUPLEXDuplex scanningBARBER · DUPLEX SCANDuplex transmissionHAYKIN · TWO-WAY LINK

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1953Nucleic-acid duplex1974Duplex scanning2001Duplex transmission
2026

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Molecular biology

Two nucleic-acid strands paired into a double helix

In molecular biology, a duplex is a double-stranded stretch of nucleic acid in which two complementary strands are held together by base pairing, as in the DNA double helix or an annealed DNA–RNA pair. Watson and Crick's 1953 Molecular structure of nucleic acids: A structure for deoxyribose nucleic acid proposed the antiparallel double-helical pairing that is the archetypal duplex. The referent is a paired two-strand molecular structure, characterised by its melting temperature and the stability of its base pairing, and it has nothing in common with a two-way radio channel or a combined ultrasound scan beyond the Latin meaning of twofold.[1]

Unit
A base-paired double-stranded region of nucleic acid
Recovery means
Not applicable
Measured by
Characterised by melting temperature, hybridisation stability, and the fraction of bases in paired versus single-stranded state

Medical imaging

One scan combining anatomy and blood-flow modes

In vascular imaging, duplex refers to an ultrasound method that combines two modes in one instrument: a B-mode image of anatomy and a pulsed Doppler measurement of blood-flow velocity from a chosen site within that image. Barber and colleagues' 1974 Ultrasonic duplex echo-Doppler scanner described the instrument that merged the two, so an operator could place the flow sample precisely on the imaged vessel. The referent is the dual-mode imaging-plus-flow examination, assessed by flow velocities and vessel appearance, and it is a distinct construct from a paired DNA strand or a two-way communication link.[2]

Unit
A combined anatomic-image and Doppler-flow ultrasound examination
Recovery means
Not applicable
Measured by
Read from Doppler velocity spectra, flow waveforms, and the co-registered B-mode vessel image

Telecommunications

A channel carrying traffic in both directions

In telecommunications, duplex describes a link that carries information in both directions: full-duplex sends and receives simultaneously (as on a telephone line), while half-duplex alternates direction (as on a walkie-talkie). Haykin's Communication systems treats the channel arrangements and the frequency- or time-division schemes that separate the two directions. The referent is the directionality arrangement of a communication channel, specified by whether and how both directions coexist, and it is unrelated to a nucleic-acid duplex or a dual-mode ultrasound beyond the shared idea of twofold.[3]

Unit
Whether and how a channel carries both transmission directions at once
Recovery means
Not applicable
Measured by
Specified by the duplexing scheme (full versus half), the direction-separation method, and the achievable simultaneous two-way throughput

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Nearby collisions

alphabet2 fields · 5 citationsjingle · one word, two constructsannealing3 fields · 5 citationsjingle · one word, three constructsarrangement3 fields · 6 citationsjingle · one word, three constructs

References

  1. Watson, J. D., & Crick, F. H. C. (1953). Molecular structure of nucleic acids: A structure for deoxyribose nucleic acid. Nature, 171(4356), 737–738. https://doi.org/10.1038/171737a0
  2. Barber, F. E., Baker, D. W., Nation, A. W. C., Strandness, D. E., & Reid, J. M. (1974). Ultrasonic duplex echo-Doppler scanner. IEEE Transactions on Biomedical Engineering, BME-21(2), 109–113. https://doi.org/10.1109/TBME.1974.324295
  3. Haykin, S. (2001). Communication systems (4th ed.). Wiley. ISBN 9780471178699

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