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A dietary supplement is a manufactured product intended to supplement a person's diet by taking a pill, capsule, tablet, powder, or liquid. [2] . A supplement can provide nutrients either extracted from food sources, or that are synthetic (in order to increase the quantity of their consumption).
Amino acids can be classified according to the locations of the core structural functional groups ( alpha- (α-), beta- (β-), gamma- (γ-) amino acids, etc.), other categories relate to polarity, ionization, and side chain group type ( aliphatic, acyclic, aromatic, polar, etc.). In the form of proteins, amino acid residues form the second ...
Testosterone is the primary male sex hormone and androgen in males. [3] In humans, testosterone plays a key role in the development of male reproductive tissues such as testicles and prostate, as well as promoting secondary sexual characteristics such as increased muscle and bone mass, and the growth of body hair.
Escherichia coli ( / ˌɛʃəˈrɪkiə ˈkoʊlaɪ / ESH-ə-RIK-ee-ə KOH-lye) [1] [2] is a gram-negative, facultative anaerobic, rod-shaped, coliform bacterium of the genus Escherichia that is commonly found in the lower intestine of warm-blooded organisms.
A country's gross domestic product (GDP) at purchasing power parity (PPP) per capita is the PPP value of all final goods and services produced within an economy in a given year, divided by the average (or mid-year) population for the same year. This is similar to nominal GDP per capita but adjusted for the cost of living in each country.
- 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...
Concerns about Spam's nutritional attributes have been raised due to the fact that it contains twice as much of the daily dietary recommendation of fat as it does of protein, and about the health effects of salt and preservatives. [7]
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