K Cell

	K Cell K cell may refer to: * ''k''-cell (mathematics) * Intestinal cells which synthesize gastric inhibitory polypeptide * Natural killer cell * Koniocellular cell * Knudsen cell * The unit cube of dimension ''k'' * Kcell Kcell (KASE: KCEL) is the Cellular Communication Operator in Kazakhstan, part of Kazakhtelecom. The company was founded in 1998 and provides cellular services under the Kcell brand, which is mainly focused on the corporate segment, and Activ, ... , a Kazakhstani mobile phone operator {{Disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	K-cell (mathematics) A k-cell is a higher-dimensional version of a rectangle or rectangular solid. It is the Cartesian product of k closed intervals on the real line. This means that a k-dimensional rectangular solid has each of its edges equal to one of the closed intervals used in the definition. The k intervals need not be identical. For example, a 2-cell is a rectangle in \mathbb^2 such that the sides of the rectangles are parallel to the coordinate axes. Every k-cell is compact. Formal definition For every integer i from 1 to k, let a_i and b_i be real numbers such that for all a_i with a < b. A 2-cell is the rectangle formed by the Cartesian product of two closed intervals, and a 3-cell is a rectangular solid. The sides and edges of a $k$ -cell need not be equal in (Euclidean) length; although the unit cube (which has boundaries of equal Euclidean length) ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Gastric Inhibitory Polypeptide Glucose-dependent insulinotropic polypeptide (GIP), also known as Gastric inhibitory polypeptide or gastric inhibitory peptide (also abbreviated as GIP), is an inhibiting hormone of the secretin family of hormones. While it is a weak inhibitor of gastric acid secretion, its main role is to stimulate insulin secretion. GIP, along with glucagon-like peptide-1 (GLP-1), belongs to a class of molecules referred to as incretins. Synthesis and transport GIP is derived from a 153-amino acid proprotein encoded by the GIP gene and circulates as a biologically active 42-amino acid peptide. It is synthesized by K cells, which are found in the mucosa of the duodenum and the jejunum of the gastrointestinal tract. Like all endocrine hormones, it is transported by blood. Gastric inhibitory polypeptide receptors are seven-transmembrane proteins found on beta-cells in the pancreas. Functions It has traditionally been named ''gastrointestinal inhibitory peptide'' or ''gastric inhibitory pept ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Natural Killer Cell Natural killer cells, also known as NK cells or large granular lymphocytes (LGL), are a type of cytotoxic lymphocyte critical to the innate immune system that belong to the rapidly expanding family of known innate lymphoid cells (ILC) and represent 5–20% of all circulating lymphocytes in humans. The role of NK cells is analogous to that of cytotoxic T cells in the vertebrate adaptive immune response. NK cells provide rapid responses to virus-infected cell and other intracellular pathogens acting at around 3 days after infection, and respond to tumor formation. Typically, immune cells detect the major histocompatibility complex (MHC) presented on infected cell surfaces, triggering cytokine release, causing the death of the infected cell by lysis or apoptosis. NK cells are unique, however, as they have the ability to recognize and kill stressed cells in the absence of antibodies and MHC, allowing for a much faster immune reaction. They were named "natural killers" because of ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Koniocellular Cell A koniocellular cell (konio: Greek, ''dust'' or ''poison'', also known as K cell) is a neuron with a small cell body that is located in the koniocellular layer of the lateral geniculate nucleus (LGN) in primates, including humans. Koniocellular layers are located ventral to each parvocellular and magnocellular layer of the LGN. Even if the quantity of neurons is approximately equal to the number of magnocellular cells the koniocellular layers are much thinner due to their size. In comparison to the parvocellular and magnocellular system, fewer studies have been conducted to investigate the koniocellular system. Koniocellular cells are a heterogeneous population differing in many aspects, such as response properties and connectivity. Structure K cells are neurochemically and anatomically distinct from M and P cells. There are three proteins by which K cells can be clearly distinguished: * Calbindin (28kDa calcium binding protein, CALB) * The alpha subunit of type II calmoduli ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Knudsen Cell In crystal growth, a Knudsen cell is an effusion evaporator source for relatively low partial pressure elementary sources (e.g. Ga, Al, Hg, As). Because it is easy to control the temperature of the evaporating material in Knudsen cells, they are commonly used in molecular-beam epitaxy. Development The Knudsen effusion cell was developed by Martin Knudsen (1871-1949). A typical Knudsen cell contains a crucible (made of pyrolytic boron nitride, quartz, tungsten or graphite), heating filaments (often made of metal tantalum), water cooling system, heat shields, and an orifice shutter. Vapor pressure measurement The Knudsen cell is used to measure the vapor pressures of a solid with very low vapor pressure. Such a solid forms a vapor at low pressure by sublimation. The vapor slowly effuses through the pinhole, and the loss of mass is proportional to the vapor pressure and can be used to determine this pressure.Peter Atkins and Julio de Paula, ''Physical Chemistry'' (8th ed., W.H.Freem ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Unit Cube A unit cube, more formally a cube of side 1, is a cube whose sides are 1 unit long.. See in particulap. 671. The volume of a 3-dimensional unit cube is 1 cubic unit, and its total surface area is 6 square units.. Unit hypercube The term ''unit cube'' or unit hypercube is also used for hypercubes, or "cubes" in ''n''-dimensional spaces, for values of ''n'' other than 3 and edge length 1. Sometimes the term "unit cube" refers in specific to the set , 1sup>''n'' of all ''n''-tuples of numbers in the interval , 1 The length of the longest diagonal of a unit hypercube of ''n'' dimensions is \sqrt n, the square root of ''n'' and the (Euclidean) length of the vector (1,1,1,....1,1) in ''n''-dimensional space. See also * Doubling the cube * K-cell * Robbins constant, the average distance between two random points in a unit cube * Tychonoff cube, an infinite-dimensional analogue of the unit cube Unit square Unit sphere In mathematics, a unit sphere is simply a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]