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  2. Magnetite - Wikipedia

    en.wikipedia.org/wiki/Magnetite

    Magnetite and other heavy minerals (dark) in a quartz beach sand (Chennai, India). Magnetite is sometimes found in large quantities in beach sand. Such black sands (mineral sands or iron sands) are found in various places, such as Lung Kwu Tan in Hong Kong; California, United States; and the west coast of the North Island of New Zealand. [32]

  3. Food testing strips - Wikipedia

    en.wikipedia.org/wiki/Food_testing_strips

    A second type of food testing strip is a gram-negative swab, which is usually administered directly to the food itself. Gram-negative swabs generally work faster than enzyme reactant strips, but they differ in that the gram-negative swabs are designed to detect a broad group of organisms, not just those that can cause foodborne illness in humans.

  4. Test strip - Wikipedia

    en.wikipedia.org/wiki/Test_strip

    A test strip is a band/piece/strip of paper or other material used for biological testing. Specifically, test strip may refer to: Food testing strips; Glucose meter test strip; Lipolysis test strip; Urine test strip; Universal indicator pH test strips; It may also refer to: Teststrip, an art gallery in Auckland, New Zealand

  5. Lodestone - Wikipedia

    en.wikipedia.org/wiki/Lodestone

    The Earth's magnetic field at 0.5 gauss is too weak to magnetize a lodestone by itself. [9] [10] The leading theory is that lodestones are magnetized by the strong magnetic fields surrounding lightning bolts. [9] [10] [11] This is supported by the observation that they are mostly found near the surface of the Earth, rather than buried at great ...

  6. Megger Group Limited - Wikipedia

    en.wikipedia.org/wiki/Megger_Group_Limited

    Megger site in Dover, England, UK. Megger Group Limited (also known as Megger) is a British manufacturing company that manufactures electronic test equipment and measuring instruments for electrical power applications.

  7. Ulvöspinel - Wikipedia

    en.wikipedia.org/wiki/Ulvöspinel

    Ulvöspinel forms as solid solutions with magnetite at high temperatures and reducing conditions, and grains crystallized from some basalt-gabbro magmas are rich in the ulvöspinel component. The ulvöspinel component tends to oxidize to magnetite plus ilmenite during subsolidus cooling of the host rocks, and the ilmenite so produced may form ...

  8. Ironsand - Wikipedia

    en.wikipedia.org/wiki/Ironsand

    It is typically dark grey or blackish in color. It is composed mainly of magnetite, Fe 3 O 4, and also contains small amounts of titanium, silica, manganese, calcium and vanadium. [1] Ironsand has a tendency to heat up in direct sunlight, causing temperatures high enough to cause minor burns.

  9. Magnetic nanoparticles - Wikipedia

    en.wikipedia.org/wiki/Magnetic_nanoparticles

    Ferrite nanoparticles or iron oxide nanoparticles (iron oxides in crystal structure of maghemite or magnetite) are the most explored magnetic nanoparticles up to date.Once the ferrite particles become smaller than 128 nm [22] they become superparamagnetic which prevents self agglomeration since they exhibit their magnetic behavior only when an external magnetic field is applied.

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