Dictionary, Defintion, Meaning, What is Fentons Reagent, Fibre Reactive Dyestuffs, FEP Plastics, Fermentation, Fermi, Fermium, Ferritin, Ferrocene, Ferrous

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Home >> Chemistry Dictionary >>Fenton's Reagent - Fibre Reactive Dyestuffs

Your Ad Here	Fenton’s reagent. An aqueous solution of FeSO₄ or other Fe²⁺ salt and hydrogen peroxide used for oxidizing polyhydric alcohols. FEP plastics. Copolymers of tetrafluorothene hexafluoropropene. Insert and corrosion resistant as Teflon but can be processed by melt techniques. Fermentation. Controlled microbial action to give useful products. Ethanol, lactic acid, ethanoic acid, gluconic acid, glutamic acid and many other amino-acids are produced by fermentation. Many pharmaceuticals, e.g. sterols, are produced by partial fermentation.
Fermi. A unit of length formerly used in nuclear physics. It is equal to 10-15 metre. In SI units this is equal to 1 femtometre (fm). It was named after the Italian-born US physicist Enrico Fermi (1901-54). Fermium. Fm. At no. 100²⁵⁷ Fm (80 days) may be formed by multiple neutron irradiation of Am and Cm, it is purified by ion exchange chromatography. The matal has not yet been prepared and as the element is so radioactive its preparation it unlikely. Ferritin. A soluble protein which is important in the absorption and storage of iron in the body.
Ferrocene. di-x-cyclopentadienyl, iron, bis (h^5-cyclopentadienyl) iron, C₁₀H₁₀Fe. m.p. 174ºC b.p. 249ºC. The prototype of metal loceues a typical cyclopentadienylide. A sandwich compound. Oxidized to the blue ferricinium cation (h^5-C₅H₅)Fe⁺. Ferrous. Iron (II) compounds.	Your Ad Here
Fertilizers. Although any substance which increases production when added to the soil could be called a fertilizer, usually contain N, P or K. Ammonium sulphate is the most important nitrogenous fertilizer; sodium nitrate, ammonium nitrate, ammonia and urea are also used. A mixture of ammonium nitrate and calcium carbonate is sold under the name of Nitro-chalk. The most important fertilizers containing phosphorous are the superphosphates. Fibre reactive dyestuffs. Reactive dyestuffs which form a direct chemical link to the OH groups of cellulose fibres and thus form very resistant colours.
Your Ad Here	Fick’s law of diffusion. A law relating the rate of diffusion of a substance in a given direction to the gradient of its concentration. Thus NA = - DAB where NA is the molar rate of diffusion/unit area; DAB is the diffusivity of substance. A in substance B ; CA is the molar concentration of A; z is the distance in the direction of diffusion.

Fictile.
Molecules which rearrange very easily. See fluxional. Eg. Fe₃ (CO)₁₂.

Fieser’s solution.
An aqueous alkaline solution of sodium anthraquinone b-sulphonate (silver salt) reduced with sodium dithionite, Na₂S₂O₄, and used as a scrubbing solution for partially removing O2 from e.g., N₂.

Films.
Formally any material deposited or used in a thin section or in layer form. Film is generally deposited whereas sheet is rolled. Vapour deposition techniques include sputtering, evaporation. Films can be of metals, oxides, etc., but are most generally thermoplastic resins, cellophane, Polyethene, polypropene, polystyrene, poly vinyl chloride, etc. Films of such polymeric organics are used as free film for wrapping, photographic images etc.

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Dictionary of Chemistry - Part 3 Part 4 Dilatometer - Dipole Moment Dispersing Agent - Doping Dulong Petit's Law - Dysprosium Ebonite - Einstein Equation Electrolysis - Electron Diffraction Electrophoresis - Emulsifying Agent Endothermic Reaction - Entropy Epimerism - Equilibrium Ergosterol - Esterification Ethene (ethylene) - Ethylation Eudiometer - Explosion Flavin Adenine Dinucleotide - Fehling's Solution Fenton's Reagent - Fibre Reactive Dyestuffs Fireclay - Flame Emission Spectroscopy Fluorescein - Fluorocarbons Fractional Crystallisation - Freeze Drying Fullers Earth - Fusible Alloys Gabriel's Reaction - Gas Calorimeter Gay Lussac's Law - Germanates Glass Electrode - Glyoxal