The FEF series consisted of three classes of steam locomotives: FEF-1, FEF-2, and FEF-3. Converted to oil fuel in 1945–1946. No. 844 in excursion service since 1960; renumbered to 8444 from 1962 to 1989. The first 20 locomotives, numbered 800–819, were …

Iron(II) fluoride or ferrous fluoride is an inorganic compound with the molecular formula FeF 2. It forms a tetrahydrate FeF 2 ·4H 2 O that is often referred to by the same names. The anhydrous and hydrated forms are white crystalline solids.

Feb 24, 2020 · Herein, we present a new one-pot, single-step, high-yield method for the colloidal synthesis of FeF 2 nanorods from a single-source precursor. The resulting 20 nm-wide nanorods are...

Mar 1, 2004 · The mid-expiratory flow rate (FEF 25–75%) is the average forced expiratory flow rate over the middle 50 percent of the FVC. It can help in the diagnosis of an obstructive ventilatory...

These locomotives were designated as Class FEF-2. They were designed to have 80" drivers, 25 x 32 cylinders, a boiler pressure of 300 psi, and a weight of 483,000 lbs giving each a tractive effort of 63,750 pounds (63,800 nominal).

Iron (II) fluoride (FeF 2): This compound is a pale green crystalline solid under normal conditions. It is soluble in water and has a high melting point. Iron (II) fluoride displays magnetic properties, making it suitable for use in certain types of electronic devices.

The Union Pacific FEF-2 is the second batch of the FEF Series (FEF meaning, "four-eight-four") which consisted of fifteen 4-8-4 "Northern" steam locomotive types built by the American Locomotive Company (ALCO) in 1939 for the Union Pacific Railroad (UP).

UP (Union Pacific) No. 833 is a type of FEF-2 Class (FEF meaning, "four-eight-four") 4-8-4 'Northern' steam locomotive that was built by ALCO (Schenectady Locomotive Works) in 1939. It is the only remaining member of Union Pacific's FEF-2 class.

Iron(III) fluoride (ferric fluoride, FeF 3), a pale green solid Index of chemical compounds with the same name This set index article lists chemical compounds articles associated with the same name.

Fe (2p) Spectra – Overlay of FeF 2 and FeF 3 Freshly exposed bulk, Flood gun is ON, C (1s) BE = 285.0 eV, Ag FWHM = 0.75 eV Overlay indicates that FeF 3 has partially degraded forming some FeF 2