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  2. PCB congener list - Wikipedia

    en.wikipedia.org/wiki/PCB_congener_list

    Congener descriptors give a shorthand notation for geometry and substituent positions. The twelve congeners that display all four of the descriptors are referred to as being "dioxin-like", referring both to their toxicity and structural features which make them similar to 2,3,7,8-tetrachlorodibenzo-p-dioxin (2378-TCDD). [1]

  3. Coplanar waveguide - Wikipedia

    en.wikipedia.org/wiki/Coplanar_waveguide

    Coplanar waveguides play an important role in the field of solid state quantum computing, e.g. for the coupling of microwave photons to a superconducting qubit.In particular the research field of circuit quantum electrodynamics was initiated with coplanar waveguide resonators as crucial elements that allow for high field strength and thus strong coupling to a superconducting qubit by confining ...

  4. Via fence - Wikipedia

    en.wikipedia.org/wiki/Via_fence

    Figure 1. A microstrip line shielded by via fences on a printed circuit board. A via fence, also called a picket fence, is a structure used in planar electronic circuit technologies to improve isolation between components that would otherwise be coupled by electromagnetic fields.

  5. Polychlorinated biphenyl - Wikipedia

    en.wikipedia.org/wiki/Polychlorinated_biphenyl

    The coplanar group members have a fairly rigid structure, with their two phenyl rings in the same plane. It renders their structure similar to polychlorinated dibenzo- p -dioxins (PCDDs) and polychlorinated dibenzofurans , and allows them to act like PCDDs, as an agonist of the aryl hydrocarbon receptor (AhR) in organisms.

  6. Planar transmission line - Wikipedia

    en.wikipedia.org/wiki/Planar_transmission_line

    An RF power amplifier incorporating planar circuit structures. The amplifier on the left feeds its output into a set of planar transmission line filters in the centre. The third circuit block on the right is a circulator to protect the amplifier from accidental reflections of the power back from the antenna

  7. Rotamer - Wikipedia

    en.wikipedia.org/wiki/Rotamer

    For example, butane has three conformers relating to its two methyl (CH 3) groups: two gauche conformers, which have the methyls ±60° apart and are enantiomeric, and an anti conformer, where the four carbon centres are coplanar and the substituents are 180° apart (refer to free energy diagram of butane).

  8. Council for Scientific and Industrial Research – Ghana

    en.wikipedia.org/wiki/Council_for_Scientific_and...

    In 1963, the NRC merged with the former Ghana Academy of Sciences, a statutory learned society. Following a review in 1966, the academy was reconstituted into, essentially, its original component bodies, namely a national research organization redesignated the CSIR and a learned Society, designated the Ghana Academy of Arts and Sciences. [2]

  9. Land grid array - Wikipedia

    en.wikipedia.org/wiki/Land_grid_array

    LGA 1700 socket on a motherboard. The land grid array (LGA) is a type of surface-mount packaging for integrated circuits (ICs) that is notable for having the pins on the socket (when a socket is used) — as opposed to pins on the integrated circuit, known as a pin grid array (PGA). [1]