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Encyclopedia > Homogenization

Homogenization (or homogenisation) is a term used in many fields such as Chemistry, agricultural science, food technology, sociology and cell biology. Homogenization is a term connotating a process that makes a mixture the same throughout the entire substance. Chemistry - the study of atoms, made of nuclei (conglomeration of center particles) and electrons (outer particles), and the structures they form. ... Agricultural science is a broad multidisciplinary field that encompasses the parts of exact, natural, economic, and social sciences that are used in the practice and understanding of agriculture. ... The food technology room at Marling School in Stroud, Gloucestershire. ... This article or section includes a list of works cited or a list of external links, but its sources remain unclear because it lacks in-text citations. ... This article or section includes a list of works cited or a list of external links, but its sources remain unclear because it lacks in-text citations. ...

Contents

Chemistry

Intensive mixing of mutually insoluble phases (sometimes with addition of Surfactants) to obtain a soluble suspension or emulsion. In the physical sciences, a phase is a set of states of a macroscopic physical system that have relatively uniform chemical composition and physical properties (i. ... Surfactants are wetting agents that lower the surface tension of a liquid, allowing easier spreading, and lower the interfacial tension between two liquids. ... It has been suggested that this article or section be merged into Mixture. ... A. Two immisicible liquids, not emulsified; B. An emulsion of Phase B dispersed in Phase A; C. The unstable emulsion progressively separates; D. The surfactant (purple outline) positions itself on the interfaces between Phase A and Phase B, stabilizing the emulsion An emulsion is a mixture of two immiscible (unblendable...


In Science:

  • Homogeneous — a mixture that is the same(uniform) throughout.
  • Heterogeneous — a mixture that has separate parts.

Food technology

One of the oldest applications of homogenization is in milk processing, where the aim is to prevent or delay the natural separation of cream from the rest of the emulsion. The fat in milk normally separates from the water and collects at the top. Homogenization is the process of breaking up that fat into smaller sizes so that it no longer separates from the milk, allowing the sale of non-separating 2% and whole milk. This is accomplished by forcing the milk at high pressure through small orifices. A glass of cows milk. ... Cans of cream. ... A. Two immisicible liquids, not emulsified; B. An emulsion of Phase B dispersed in Phase A; C. The unstable emulsion progressively separates; D. The surfactant (purple outline) positions itself on the interfaces between Phase A and Phase B, stabilizing the emulsion An emulsion is a mixture of two immiscible (unblendable...


When soft solids are milled in a liquid, this can also be seen as a form of homogenization. Among the many types of equipment that can be used for this process are extruders, hammermills and colloid mills. An ancient Chinese tomb model of a foot-powered mill, Eastern Han Dynasty (25 - 220 AD), Freer Gallery of Art. ... Extrusion is a manufacturing process where a billet of material is pushed and/or drawn though a die to create a shaped rod, rail or pipe. ... Hammermill for milling grain A hammermill is a machine whose purpose is to shred material into fine particles. ... A colloid mill is a machine that is used to reduce the particle size of a solid in suspension in a liquid, or to reduce the droplet size of a liquid suspended in another liquid. ...


Cell biology

Homogenization is a process that involves breaking apart cells - releasing organelles and cytoplasm. When the purpose is to extract organelles, it is frequently done in two steps; first using a blender to break the tissue up, and then with an ultrasonic or mechanical tissue disruptor. The organelles are then generally separated using differential centrifugation. Depending upon the subcellular fraction wanted, different processes are used to separate them. When the aim is to extract nucleic acids, the tissue is often ground in a mortar and pestle under liquid nitrogen. It has been suggested that Cytoplast be merged into this article or section. ... Schematic of typical animal cell, showing subcellular components. ... An electric blender. ... Biological tissue is a collection of interconnected cells that perform a similar function within an organism. ... Ultrasound is a form of cyclic sound pressure with a frequency greater than the upper limit of human hearing, this limit being approximately 20 kilohertz (20,000 hertz). ... Differential centrifugation is a procedure in which the homogenate is subjected to repeated centrifugations each time increasing the centrifugal force. ... Look up nucleic acid in Wiktionary, the free dictionary. ... Mortar and pestle Mortar used to pulverise plant material with liquid nitrogen A mortar and pestle is a tool used to grind and mix substances. ... General Name, Symbol, Number nitrogen, N, 7 Chemical series nonmetals Group, Period, Block 15, 2, p Appearance colorless gas Standard atomic weight 14. ...


Sometimes, however, a much milder procedure is followed, where the aim is to collect whole, intact cells. Homogenized cells must be kept at low temperatures to prevent autolysis and kept in an isotonic solution to prevent osmotic damage. In chemistry, autolysis is the production of a substance which catalyses the reaction it was made in, or catalyzes its own transformation into another compound. ... Categories: Wikipedia cleanup | Chemistry stubs ... Osmosis is the net movement of water across a partially permeable membrane from a region of high solvent potential to an area of low solvent potential, up a solute concentration gradient. ...


See also

Pasteurization (or pasteurisation) is the process of heating liquids for the purpose of destroying viruses and harmful organisms such as bacteria, protozoa, molds, and yeasts. ...

External links


  Results from FactBites:
 
Which is better for the web: single vendor homogeneity, or OSS/Web 2.0-style innovation? - The Web Standards Project (2787 words)
Which is better for the web: single vendor homogeneity, or OSS/Web 2.0-style innovation?
Pure platform companies fail (MS has Office as well as Windows, and they’re diversifying).
Platforms are great, but not in isolation.Comment #14 by Brendan Eich on ‘Which is better for the web: single vendor homogeneity, or OSS/Web 2.0-style innovation?’ […]
Homogeneity - Wikipedia, the free encyclopedia (872 words)
The coefficient of the internal consistency reliability and the coefficient of homogeneity for tautologous lattices are both equal to zero.
Interest in homogeneity of data was revived during the closing decades of the last century by Cliff (1977), and by Krus and Blackman (1988).
This coefficient of homogeneity is numerically equivalent with both the Loevinger's and Cliff's conceptualizations of the coefficient of homogeneity.
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