NIH (disambiguation)

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NIH is the National Institutes of Health in the United States.

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NIH may also refer to:

Organisations

Other uses

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<span class="mw-page-title-main">Nickel</span> Chemical element with atomic number 28 (Ni)

Nickel is a chemical element; it has symbol Ni and atomic number 28. It is a silvery-white lustrous metal with a slight golden tinge. Nickel is a hard and ductile transition metal. Pure nickel is chemically reactive, but large pieces are slow to react with air under standard conditions because a passivation layer of nickel oxide forms on the surface that prevents further corrosion. Even so, pure native nickel is found in Earth's crust only in tiny amounts, usually in ultramafic rocks, and in the interiors of larger nickel–iron meteorites that were not exposed to oxygen when outside Earth's atmosphere.

<span class="mw-page-title-main">Nickel–metal hydride battery</span> Type of rechargeable battery

A nickel–metal hydride battery is a type of rechargeable battery. The chemical reaction at the positive electrode is similar to that of the nickel-cadmium cell (NiCd), with both using nickel oxide hydroxide (NiOOH). However, the negative electrodes use a hydrogen-absorbing alloy instead of cadmium. NiMH batteries can have two to three times the capacity of NiCd batteries of the same size, with significantly higher energy density, although only about half that of lithium-ion batteries.

HF, Hf or hf can refer to:

<span class="mw-page-title-main">Nickel–cadmium battery</span> Type of rechargeable battery

The nickel–cadmium battery is a type of rechargeable battery using nickel oxide hydroxide and metallic cadmium as electrodes. The abbreviation Ni–Cd is derived from the chemical symbols of nickel (Ni) and cadmium (Cd): the abbreviation NiCad is a registered trademark of SAFT Corporation, although this brand name is commonly used to describe all Ni–Cd batteries.

Nis, Niš, NiS or NIS may refer to:

NH or Nh may refer to

NIMH may refer to:

NIB, nib or NiB may refer to:

NMH can refer to:

Nio or NIO may refer to:

<span class="mw-page-title-main">Nickel–iron battery</span> Type of rechargeable battery

The nickel–iron battery is a rechargeable battery having nickel(III) oxide-hydroxide positive plates and iron negative plates, with an electrolyte of potassium hydroxide. The active materials are held in nickel-plated steel tubes or perforated pockets. It is a very robust battery which is tolerant of abuse, and can have very long life even if so treated. It is often used in backup situations where it can be continuously charged and can last for more than 20 years. Due to its low specific energy, poor charge retention, and high cost of manufacture, other types of rechargeable batteries have displaced the nickel–iron battery in most applications.

<span class="mw-page-title-main">Raney nickel</span> Chemical compound

Raney nickel, also called spongy nickel, is a fine-grained solid composed mostly of nickel derived from a nickel–aluminium alloy. Several grades are known, of which most are gray solids. Some are pyrophoric, but most are used as air-stable slurries. Raney nickel is used as a reagent and as a catalyst in organic chemistry. It was developed in 1926 by American engineer Murray Raney for the hydrogenation of vegetable oils. Raney is a registered trademark of W. R. Grace and Company. Other major producers are Evonik and Johnson Matthey.

<span class="mw-page-title-main">Nickel–zinc battery</span> Type of rechargeable battery

A nickel–zinc battery is a type of rechargeable battery similar to nickel–cadmium batteries, but with a higher voltage of 1.6 V.

<span class="mw-page-title-main">Nickel(II) oxide</span> Chemical compound

Nickel(II) oxide is the chemical compound with the formula NiO. It is the principal oxide of nickel. It is classified as a basic metal oxide. Several million kilograms are produced annually of varying quality, mainly as an intermediate in the production of nickel alloys. The mineralogical form of NiO, bunsenite, is very rare. Other nickel(III) oxides have been claimed, for example: Ni
2
O
3
and NiO
2
, but remain unproven.

<span class="mw-page-title-main">Nickel(II) sulfate</span> Chemical compound

Nickel(II) sulfate, or just nickel sulfate, usually refers to the inorganic compound with the formula NiSO4(H2O)6. This highly soluble blue green coloured salt is a common source of the Ni2+ ion for electroplating. Approximately 40,000 tonnes were produced in 2005.

<span class="mw-page-title-main">Nickel–hydrogen battery</span> Type of rechargeable battery

A nickel–hydrogen battery (NiH2 or Ni–H2) is a rechargeable electrochemical power source based on nickel and hydrogen. It differs from a nickel–metal hydride (NiMH) battery by the use of hydrogen in gaseous form, stored in a pressurized cell at up to 1200 psi (82.7 bar) pressure. The nickel–hydrogen battery was patented in the United States on February 25, 1971 by Alexandr Ilich Kloss, Vyacheslav Mikhailovic Sergeev and Boris Ioselevich Tsenter from the Soviet Union.

NICD may refer to:

Sergio Focardi was an Italian physicist and professor emeritus at the University of Bologna. He led the Department of Bologna of the (Italian) National Institute for Nuclear Physics and the Faculty of Mathematical, Physical and Natural Sciences at the University of Bologna.

This is a list of commercially-available battery types summarizing some of their characteristics for ready comparison.

Hydrogen battery may refer to: