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Pore Size Distribution
Pore may refer to: Biology Animal biology and microbiology * Sweat pore, an anatomical structure of the skin of humans (and other mammals) used for secretion of sweat * Hair follicle, an anatomical structure of the skin of humans (and other mammals) used for secretion of sebum * Canal pore, an anatomical structure that is part of the lateral line sense system of some aquatic organisms * Gonopore, a genital pore present in some invertebrates, particularly insects * Ozopore, the external discharge site of defensive glands in millipedes and some arachnids * An opening across both inner and outer bacterial membranes, a part of many Gram-negative bacterial secretion systems * One of the openings communicating with the skin surface at the terminus of lactiferous ducts in milk-producing mammals Plant and fungal biology * Germ pore, a small pore in the outer wall of a fungal spore through which the germ tube exits upon germination * Stoma, a small opening on a plant leaf used for g ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sweat Pore
Perspiration, also known as sweating, is the production of fluids secreted by the sweat glands in the skin of mammals. Two types of sweat glands can be found in humans: eccrine glands and apocrine glands. The eccrine sweat glands are distributed over much of the body and are responsible for secreting the watery, brackish sweat most often triggered by excessive body temperature. The apocrine sweat glands are restricted to the armpits and a few other areas of the body and produce an odorless, oily, opaque secretion which then gains its characteristic odor from bacterial decomposition. In humans, sweating is primarily a means of thermoregulation, which is achieved by the water-rich secretion of the eccrine glands. Maximum sweat rates of an adult can be up to 2–4 liters per hour or 10–14 liters per day (10–15 g/min·m2), but is less in children prior to puberty. Evaporation of sweat from the skin surface has a cooling effect due to evaporative cooling. Hence, in hot weather ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aquaporin
Aquaporins, also called water channels, are channel proteins from a larger family of major intrinsic proteins that form pores in the membrane of biological cells, mainly facilitating transport of water between cells. The cell membranes of a variety of different bacteria, fungi, animal and plant cells contain aquaporins through which water can flow more rapidly into and out of the cell than by diffusing through the phospholipid bilayer. Aquaporins have six membrane-spanning alpha helical domains with both carboxylic and amino terminals on the cytoplasmic side. Two hydrophobic loops contain conserved asparagine- proline-alanine ("NPA motif") which form a barrel surrounding a central pore-like region that contains additional protein density. Because aquaporins are usually always open and are prevalent in just about every cell type, this leads to a misconception that water readily passes through the cell membrane down its concentration gradient. Water can pass through the cell mem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Poor (other)
Poor is an adjective related to a state of poverty. Poor or The poor may also refer to: Places *Pur, Iran ( fa, پور, links=no, also romanized as ''poor''), a village in Hormozgan Province, Iran *Poor Mountain, a mountain in Virginia *Poor Valley, a valley in Tennessee and Virginia People with the name * Charles Henry Poor (1808–1882), a United States Navy officer * Charles Lane Poor (1866–1951), an American astronomer * Edward Erie Poor (1837–1900), an American banker, president of the National Park Bank * Enoch Poor (1736–1780), an American general in the American Revolutionary War * Henry Poor (other), various people * Janet Meakin Poor (born 1929), an American landscape design specialist from Winnetka, Illinois * John A. Poor (1808–1871), an American lawyer, editor, and railroad entrepreneur * Salem Poor (1747–1802), an African-American slave and American Revolutionary War soldier Music * The Poor (American band), American rock band * The Poor (Au ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aperture
In optics, an aperture is a hole or an opening through which light travels. More specifically, the aperture and focal length of an optical system determine the cone angle of a bundle of rays that come to a focus in the image plane. An optical system typically has many openings or structures that limit the ray bundles (ray bundles are also known as ''pencils'' of light). These structures may be the edge of a lens or mirror, or a ring or other fixture that holds an optical element in place, or may be a special element such as a diaphragm placed in the optical path to limit the light admitted by the system. In general, these structures are called stops, and the aperture stop is the stop that primarily determines the ray cone angle and brightness at the image point. In some contexts, especially in photography and astronomy, ''aperture'' refers to the diameter of the aperture stop rather than the physical stop or the opening itself. For example, in a telescope, the aperture ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Daniel Alolga Akata Pore
Daniel Alolga Akata Pore is a Ghanaian politician and former soldier. He was a member of the Provisional National Defence Council which ruled Ghana following the military coup d'état on 31 December 1981. He was arrested along with others including Tata Ofosu, editor of the June Four Movement's paper The Workers’ Banner and Kwame Pianim on 23 November 1982 following the capture of part of Gondar Barracks, Burma Camp in an apparent abortive coup attempt. He remained in custody until 19 June 1983, when he among with others escaped from custody during another coup attempt led by Sergeant Abdul Malik and Corporal Carlos Halidu Giwa. He went into exile in London, United Kingdom, following his escape. See also *Provisional National Defence Council *Joachim Amartey Quaye Joachim Amartey Quaye was a Ghanaian politician. He was found guilty of involvement in the murder of four Ghanaian citizens and executed by a firing squad in 1982. Politics Amartey Quaye was one of the origin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ryan Pore
Ryan Pore (born September 23, 1983 in Mansfield, Ohio) is an American former professional soccer player and the current head men's soccer coach of he Kansas City Roos men's soccer team at the University of Missouri–Kansas City. Career Youth and College Pore attended Madison Comprehensive High School in Mansfield, Ohio and holds the Ohio High School Athletic Association record for most goals scored in a season (62) and school record in basketball for career scoring. He then went on to play college soccer at the University of Tulsa, where in 2004 he was a finalist for the Hermann Trophy and was awarded Soccer America Player of the Year. Professional Pore went on to forgo his senior season at Tulsa and signed a Generation Adidas contract. He was drafted in the second round (16th overall) of the 2005 MLS SuperDraft by Kansas City Wizards, and spent the next four years with the MLS side, playing in 58 league games and tallying three goals. After the 2008 season, he was out of co ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pore, Casanare
Pore is a town and municipality in the Department of Casanare, Colombia. Pore, which played a vital role during the independence movement, was the 18th town to be declared a '' Pueblo Patrimonio de Colombia'' (Heritage Town of Colombia) on March 1, 2021. It is the first municipality east of the Andes The Andes, Andes Mountains or Andean Mountains (; ) are the longest continental mountain range in the world, forming a continuous highland along the western edge of South America. The range is long, wide (widest between 18°S – 20°S ... to be inducted into the ''Pueblo Patrimonio'' network. References Municipalities of Casanare Department {{Casanare-geo-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Solar Pore
Sunspots are phenomena on the Sun's photosphere that appear as temporary spots that are darker than the surrounding areas. They are regions of reduced surface temperature caused by concentrations of magnetic flux that inhibit convection. Sunspots appear within active regions, usually in pairs of opposite magnetic polarity. Their number varies according to the approximately 11-year solar cycle. Individual sunspots or groups of sunspots may last anywhere from a few days to a few months, but eventually decay. Sunspots expand and contract as they move across the surface of the Sun, with diameters ranging from to . Larger sunspots can be visible from Earth without the aid of a telescope. They may travel at relative speeds, or proper motions, of a few hundred meters per second when they first emerge. Indicating intense magnetic activity, sunspots accompany other active region phenomena such as coronal loops, prominences, and reconnection events. Most solar flares and coronal mas ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Void (composites)
A void is a pore that remains unfilled with polymer and fibers in a composite material. Voids are typically the result of poor manufacturing of the material and are generally deemed undesirable. Voids can affect the mechanical properties and lifespan of the composite. They degrade mainly the matrix-dominated properties such as interlaminar shear strength, longitudinal compressive strength, and transverse tensile strength. Voids can act as crack initiation sites as well as allow moisture to penetrate the composite and contribute to the anisotropy of the composite. For aerospace applications, a void content of approximately 1% is still acceptable, while for less sensitive applications, the allowance limit is 3-5%. Although a small increase in void content may not seem to cause significant issues, a 1-3% increase in void content of carbon fiber reinforced composite can reduce the mechanical properties by up to 20% Void content in composites is represented as a ratio, also called ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pore Space In Soil
The pore space of soil contains the liquid and gas phases of soil, i.e., everything but the solid phase that contains mainly minerals of varying sizes as well as organic compounds. In order to understand porosity better a series of equations have been used to express the quantitative interactions between the three phases of soil. Macropores or fractures play a major role in infiltration rates in many soils as well as preferential flow patterns, hydraulic conductivity and evapotranspiration. Cracks are also very influential in gas exchange, influencing respiration within soils. Modeling cracks therefore helps understand how these processes work and what the effects of changes in soil cracking such as compaction, can have on these processes. The pore space of soil may contain the habitat of plants (rhizosphere) and microorganisms. Background Bulk density \rho = \frac The bulk density of soil depends greatly on the mineral make up of soil and the degree of compaction. The densi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pore (bread)
Pores are the air pockets found in leavened bread, where carbon dioxide from the fermentation process creates a network of primarily interconnected void structures. The degree to which pores form are a major determiner in the texture ("crumb") of the bread. Pore size varies between varieties of bread. Sourdough bread is a variety with larger pores. Rye bread Rye bread is a type of bread made with various proportions of flour from rye grain. It can be light or dark in color, depending on the type of flour used and the addition of coloring agents, and is typically denser than bread made from wheat f ... has smaller pores and a denser crumb. See also * References {{reflist Further reading"Digital bread crumb: Creation and application" Breads Baking Fermentation in food processing ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sintering
Clinker nodules produced by sintering Sintering or frittage is the process of compacting and forming a solid mass of material by pressure or heat without melting it to the point of liquefaction. Sintering happens as part of a manufacturing process used with metals, ceramics, plastics, and other materials. The atoms in the materials diffuse across the boundaries of the particles, fusing the particles together and creating one solid piece. Because the sintering temperature does not have to reach the melting point of the material, sintering is often chosen as the shaping process for materials with extremely high melting points such as tungsten and molybdenum. The study of sintering in metallurgical powder-related processes is known as powder metallurgy. An example of sintering can be observed when ice cubes in a glass of water adhere to each other, which is driven by the temperature difference between the water and the ice. Examples of pressure-driven sintering are the compact ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
_2007-04-30_T001456.gif "Click for more on -> Solar Pore")
