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  2. Kvant-2 - Wikipedia

    en.wikipedia.org/wiki/Kvant-2

    Kvant-2 was the first Mir module based on the TKS spacecraft (77k module). Kvant-2 was divided into three compartments. They were the EVA airlock, the instrument/cargo compartment, and the instrument/experiment compartment. The instrument/cargo compartment could be sealed off and act as an extension or a back-up to the airlock.

  3. Nuclear reactor core - Wikipedia

    en.wikipedia.org/wiki/Nuclear_reactor_core

    A nuclear reactor core is the portion of a nuclear reactor containing the nuclear fuel components where the nuclear reactions take place and the heat is generated. [1] Typically, the fuel will be low- enriched uranium contained in thousands of individual fuel pins.

  4. Mir Core Module - Wikipedia

    en.wikipedia.org/wiki/Mir_Core_Module

    This increased solar panel area of this module from 76 m 2 to 98m 2. [2] At one point, it was planned for Buran to visit the station around 1992 and exchange the existing core module for a new one. [2] A grappling arm would transfer the attached modules to the new core, and then take the original core module back to Earth. [2]

  5. Nuclear thermal rocket - Wikipedia

    en.wikipedia.org/wiki/Nuclear_thermal_rocket

    Nuclear gas core closed cycle rocket engine diagram, nuclear "light bulb" Nuclear gas core open cycle rocket engine diagram The final fission classification is the gas-core engine . This is a modification to the liquid-core design which uses rapid circulation of the fluid to create a toroidal pocket of gaseous uranium fuel in the middle of the ...

  6. Promoter (genetics) - Wikipedia

    en.wikipedia.org/wiki/Promoter_(genetics)

    Cis-regulatory modules that are localized in DNA regions distant from the promoters of genes can have very large effects on gene expression, with some genes undergoing up to 100-fold increased expression due to such a cis-regulatory module. [27] These cis-regulatory modules include enhancers, silencers, insulators and tethering elements. [28]

  7. Cis-regulatory element - Wikipedia

    en.wikipedia.org/wiki/Cis-regulatory_element

    Cis-regulatory elements (CREs) or cis-regulatory modules (CRMs) are regions of non-coding DNA which regulate the transcription of neighboring genes.CREs are vital components of genetic regulatory networks, which in turn control morphogenesis, the development of anatomy, and other aspects of embryonic development, studied in evolutionary developmental biology.

  8. Magnetic-core memory - Wikipedia

    en.wikipedia.org/wiki/Magnetic-core_memory

    One of three inter-connected modules that make up an Omnibus-based PDP-8 core memory plane. The most common form of core memory, X/Y line coincident-current , used for the main memory of a computer, consists of a large number of small toroidal ferrimagnetic ceramic ferrites ( cores ) held together in a grid structure (organized as a "stack" of ...

  9. Non-coding RNA - Wikipedia

    en.wikipedia.org/wiki/Non-coding_RNA

    The B2 RNA is a small noncoding RNA polymerase III transcript that represses mRNA transcription in response to heat shock in mouse cells. B2 RNA inhibits transcription by binding to core Pol II. Through this interaction, B2 RNA assembles into preinitiation complexes at the promoter and blocks RNA synthesis. [40]