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  2. Functional electrical stimulation - Wikipedia

    en.wikipedia.org/wiki/Functional_electrical...

    In some applications, FES can be used to directly stimulate muscles, if their peripheral nerves have been severed or damaged (i.e., denervated muscles). [11] However, the majority of the FES systems used today stimulate the nerves or the points where the junction occurs between the nerve and the muscle.

  3. Flywheel energy storage - Wikipedia

    en.wikipedia.org/wiki/Flywheel_energy_storage

    NASA G2 flywheel. Flywheel energy storage (FES) works by accelerating a rotor to a very high speed and maintaining the energy in the system as rotational energy.When energy is extracted from the system, the flywheel's rotational speed is reduced as a consequence of the principle of conservation of energy; adding energy to the system correspondingly results in an increase in the speed of the ...

  4. Iron(II) sulfide - Wikipedia

    en.wikipedia.org/wiki/Iron(II)_sulfide

    Iron(II) sulfide or ferrous sulfide (Br.E. sulphide) is one of a family of chemical compounds and minerals with the approximate formula Fe S. Iron sulfides are often iron-deficient non-stoichiometric .

  5. Pyrite - Wikipedia

    en.wikipedia.org/wiki/Pyrite

    This is the first study to demonstrate the production of non-layered 2D-platelets from 3D bulk FeS 2. Furthermore, they have used these 2D-platelets with 20% single walled carbon-nanotube as an anode material in lithium-ion batteries, reaching a capacity of 1000 mAh/g close to the theoretical capacity of FeS 2. [32]

  6. Iron sulfide - Wikipedia

    en.wikipedia.org/wiki/Iron_sulfide

    Iron(II) sulfide, FeS; Greigite, Fe 3 S 4 (cubic) Pyrrhotite, Fe 1−x S (where x = 0 to 0.2) (monoclinic or hexagonal) Troilite, FeS, the endmember of pyrrhotite ...

  7. Iron(II) sulfate - Wikipedia

    en.wikipedia.org/wiki/Iron(II)_sulfate

    6 FeSO 4 + 3 H 2 SO 4 + 2 HNO 3 → 3 Fe 2 (SO 4) 3 + 4 H 2 O + 2 NO 6 FeSO 4 + 3 Cl 2 → 2 Fe 2 (SO 4) 3 + 2 FeCl 3. Its mild reducing power is of value in organic synthesis. [44] It is used as the iron catalyst component of Fenton's reagent. Ferrous sulfate can be detected by the cerimetric method, which is the official method of the Indian ...

  8. Guinness Foreign Extra Stout - Wikipedia

    en.wikipedia.org/wiki/Guinness_Foreign_Extra_Stout

    Guinness Foreign Extra Stout (FES) is a stout produced by the Guinness Brewery, an Irish brewing company owned by Diageo, a drinks multinational. First brewed by Guinness in 1801, FES was designed for export, and is more heavily hopped than Guinness Draught and Extra Stout, which gives it a more bitter taste, [ 4 ] and typically has a higher ...

  9. Iron(III) sulfide - Wikipedia

    en.wikipedia.org/wiki/Iron(III)_sulfide

    Greigite, with the chemical formula Fe 2+ Fe 3+ 2 S 4, is a mixed valence compound containing both Fe(III) and Fe(II). It is the sulfur equivalent of the iron oxide magnetite (Fe 3 O 4). As established by X-ray crystallography, the S anions form a cubic close-packed lattice, and the Fe cations occupy both tetrahedral and octahedral sites. [5]