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  2. Operation Dropshot - Wikipedia

    en.wikipedia.org/wiki/Operation_Dropshot

    Operation Dropshot was the United States Department of Defense code name for a contingency plan for a possible nuclear and conventional war with the Soviet Union and its allies in order to counter the anticipated Soviet takeover of Western Europe, the Near East and parts of Eastern Asia expected to begin about 1957.

  3. Headspace gas chromatography for dissolved gas measurement

    en.wikipedia.org/wiki/Headspace_Gas...

    The method uses headspace gas injected into a gas chromatographic column (GC) to determine the original concentration in a water sample. [9] A sample of water is collected in the field in a vial without headspace and capped with a Teflon septum or crimp top to minimize the escape of volatile gases. It is beneficial to store the bottles upside ...

  4. Comprehensive two-dimensional gas chromatography - Wikipedia

    en.wikipedia.org/wiki/Comprehensive_two...

    Comprehensive two-dimensional gas chromatography, or GC×GC, is a multidimensional gas chromatography technique that was originally described in 1984 by J. Calvin Giddings [1] and first successfully implemented in 1991 by John Phillips and his student Zaiyou Liu. [2] GC×GC utilizes two different columns with two different stationary phases. In ...

  5. Analytical thermal desorption - Wikipedia

    en.wikipedia.org/wiki/Analytical_thermal_desorption

    Analytical thermal desorption, known within the analytical chemistry community simply as "thermal desorption" (TD), is a technique that concentrates volatile organic compounds (VOCs) in gas streams prior to injection into a gas chromatograph (GC). It can be used to lower the detection limits of GC methods, and can improve chromatographic ...

  6. Electron capture detector - Wikipedia

    en.wikipedia.org/wiki/Electron_capture_detector

    Electron capture detector developed by James Lovelock in the Science Museum, London Electron capture detector, Science History Institute. The electron capture detector is used for detecting electron-absorbing components (high electronegativity) such as halogenated compounds in the output stream of a gas chromatograph.

  7. Group 4 compression - Wikipedia

    en.wikipedia.org/wiki/Group_4_compression

    CCITT Group 4 compression, also referred to as G4 or Modified Modified READ (MMR), is a lossless method of image compression used in Group 4 fax machines defined in the ITU-T T.6 fax standard. It is only used for bitonal (black-and-white) images.

  8. Response factor - Wikipedia

    en.wikipedia.org/wiki/Response_factor

    The response factor can be expressed on a molar, volume or mass [1] basis. Where the true amount of sample and standard are equal: = where A is the signal (e.g. peak area) and the subscript i indicates the sample and the subscript st indicates the standard. [2]

  9. Drop (unit) - Wikipedia

    en.wikipedia.org/wiki/Drop_(unit)

    The drop is an approximated unit of measure of volume, the amount dispensed as one drop from a dropper or drip chamber.It is often used in giving quantities of liquid drugs to patients, and occasionally in cooking and in organic synthesis.