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  1. en.wikipedia.org › wiki › ZincZinc - Wikipedia

    Zinc is an essential trace element for humans, [6] [7] [8] animals, [9] plants [10] and for microorganisms [11] and is necessary for prenatal and postnatal development. [12] It is the second most abundant trace metal in humans after iron and it is the only metal which appears in all enzyme classes.

  2. en.wikipedia.org › wiki › PlatypusPlatypus - Wikipedia

    The platypus ( Ornithorhynchus anatinus ), [3] sometimes referred to as the duck-billed platypus, [4] is a semiaquatic, egg-laying mammal endemic to eastern Australia, including Tasmania.

    • Composition
    • Formation
    • Discovery
    • Other Deposits
    • Commercial Form
    • Usage
    • Specific Varieties
    • Microbial Degradation
    • Climatologic Importance
    • Safety Considerations

    Each deposit of diatomaceous earth is different, with varying blends of pure diatomaceous earth combined with other natural clays and minerals. The diatoms in each deposit contain different amounts of silica, depending on the sedimentation conditions, on the presence of other sediments (clay, sand, volcanic ashes), and on the age of the deposit (di...

    Diatomite forms by the accumulation of the amorphous silica (opal, SiO2·nH2O) remains of dead diatoms (microscopic single-celled algae) in lake sediment or marine sediments. The fossil remains consist of a pair of symmetrical shells or frustules. Marine diatomites are found in association with a wide variety of other rock types but lacustrine diato...

    In 1836 or 1837, German peasant Peter Kasten discovered diatomaceous earth (German: Kieselgur) when sinking a well on the northern slopes of the Haußelberg hill, on Lüneburg Heath in North Germany. The extraction site on Lüneburg Heath was 1863–1994 Neuohe, while the storage sites were: The deposits are up to 28 meters (92 ft) thick and are all of ...

    In Poland diatomaceous earth deposits are found in Jawornik, and are composed mostly of diatomaceous skeletons (frustules). In Germany, diatomaceous earth was also extracted at Altenschlirf on the Vogelsberg (Upper Hesse) and at Klieken (Saxony-Anhalt). There is a layer of diatomaceous earth more than 6 meters (20 ft) thick in the nature reserve of...

    Diatomaceous earth is available commercially in several formats: 1. granulateddiatomaceous earth is a raw material simply crushed for convenient packaging 2. milled or micronizeddiatomaceous earth is especially fine (10 μm to 50 μm) and used for insecticides. 3. calcineddiatomaceous earth is heat-treated and activated for filters.

    Explosives

    In 1866, Alfred Nobel discovered that nitroglycerin could be made much more stable if absorbed in diatomite (kieselguhr). This allowed a much safer transport and handling than pure nitroglycerin under the liquid form. Nobel patented this mixture as dynamitein 1867; the mixture is also called guhr dynamite by reference to the German term kieselguhr.

    Filtration

    The Celle engineer, Wilhelm Berkefeld, recognized the ability of the diatomaceous earth to filter and developed tubular filters (known as filter candles) fired from diatomaceous earth. During the cholera epidemic in Hamburg in 1892, these Berkefeld filters were used successfully.One form of diatomaceous earth is used as a filter medium, especially for swimming pools. It has a high porosity because it is composed of microscopically small, hollow particles. Diatomaceous earth (sometimes referre...

    Abrasive

    The oldest use of diatomite is as a very mild abrasive and has been used in toothpaste, metal polishes, and some facial scrubs.

    Tripolite is the variety found in Tripoli, Libya.
    Bann clay is the variety found in the Lower Bannvalley in Northern Ireland.
    Moler (mo-clay) is the variety found in northwestern Denmark, especially on the islands of Fur and Mors.
    Freshwater-derived food grade diatomaceous earth is the type used in United States agriculture for grain storage, as feed supplement, and as an insecticide. It is produced uncalcinated, has a very...

    Certain species of bacteria in oceans and lakes can accelerate the rate of dissolution of silica in dead and living diatoms by using hydrolyticenzymes to break down the organic algal material.

    The Earth's climate is affected by dust in the atmosphere, so locating major sources of atmospheric dust is important for climatology. Recent research indicates that surface deposits of diatomaceous earth play an important role. Research shows that significant dust comes from the Bodélé Depression in Chad, where storms push diatomite gravel over du...

    Inhalation of crystalline silica is harmful to the lungs, causing silicosis. Amorphous silica is considered to have low toxicity, but prolonged inhalation causes changes to the lungs. Diatomaceous earth is mostly amorphous silica but contains some crystalline silica, especially in the saltwater forms. In a 1978 study of workers, those exposed to na...

  3. en.wikipedia.org › wiki › Spam_(food)Spam (food) - Wikipedia

    SPAM wall. Spam is a brand of processed canned pork and ham made by Hormel Foods Corporation. It was introduced in 1937 and gained popularity worldwide after its use during World War II. [1] By 2003, Spam was sold in 41 countries (and trademarked in over 100) on six continents. [2]

  4. en.wikipedia.org › wiki › VeganismVeganism - Wikipedia

    Veganism - Wikipedia. Veganism is the practice of abstaining from the use of animal products —particularly in diet —and an associated philosophy that rejects the commodity status of animals. [c] A person who practices veganism is known as a vegan . The foundations of veganism include ethical, moral, environmental, health and humanitarian arguments.

  5. en.wikipedia.org › wiki › UNICEFUNICEF - Wikipedia

    In 2018, UNICEF assisted in the birth of 27 million babies, administered pentavalent vaccines to an estimated 65.5 million children, provided education for 12 million children, treated four million children with severe acute malnutrition, and responded to 285 humanitarian emergencies in 90 countries. [10]

  6. Top: Lightning and neon lights are commonplace generators of plasma. Center left: A plasma globe, illustrating some of the more complex plasma phenomena, including filamentation. Center right: A plasma trail from the Space Shuttle Atlantis during re-entry into Earth's atmosphere, as seen from the International Space Station. Bottom left: A ...

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