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  • Satellite DNA

    That portion of the DNA in plant and animal cells consisting of highly repetitious sequences (millions of copies) typically in the range from 5 to 500 bases. Thousands of copies occur tandemly (end-on-end) at each of many sites. It can be isolated from the rest of the DNA by density gradient centrifugation.

  • Satellite RNA

    A small, self-splicing RNA molecule that accompanies several plant viruses, including tobacco ringspot virus.

  • Saturated Air

    When there is a state of mutual equilibrium between the moist air and the liquid or solid phases of water. Saturated air holds as much water vapor as it can for a given temperature and pressure.

  • Saturated Fatty Acids

    Fatty acids containing fully saturated alkyl chains.

  • Saturation Humidity

    The air is saturated when the partial pressure of water vapor in the air at a given temperature equals the vapor pressure of water at the same temperature.

  • Saturation Index

    The relation of calcium carbonate to the pH, alkalinity, and hardness of water to determine its scale-forming tendency.

  • SAW

    Submerged Arc Welding

  • SB

    Smallest Batch Size

  • SB

    Styrene-Butadiene

  • SBC

    Southern Building Code

  • SBCCI

    Southern Building Code Congress International

  • SBCs

    Standard Building Codes

  • SBEM

    Simplified Building Energy Model

  • SBR

    Styrene-Butadiene Rubber

  • SBS

    Styrene-Butadiene-Styrene (block copolymer)

  • SBV

    Split Butterfly Valve

  • SCADA

    Supervisory Control And Data Acquisition

  • Scaffold

    The central core structure of condensed chromosomes. The scaffold is composed of non-histone chromosomal proteins.

  • Scale

    The precipitate that forms on surfaces in contact with water as the result of a physical of chemical change.

  • Scale

    The mineral deposit that can coat the insides of boilers or the surfaces of RO membranes. It consists mainly of calcium carbonate that precipitates out of solution under certain conditions of pH, alkalinity, and hardness.

  • Scale

    The precipitate that forms on surfaces in contact with water as the result of a physical of chemical change.

  • Scale (metals)

    A layer of oxidation products formed on a metal at high temperature.

  • Scale-up

    To take a biopharmaceutical manufacturing process from the laboratory scale to a scale at which it is commercially feasible.

  • Scale-up

    To take a biopharmaceutical manufacturing process from the laboratory scale to a scale at which it is commercially feasible.

  • Scanning

    Method for disclosing leaks in units, whereby the probe inlet of an aerosol photometer or discrete-particle counter (DPC) is moved in overlapping strokes across the defined test area. ISO 14644-3.