Compoundheterozygosity in medical genetics is the condition of having two heterogeneous recessive alleles ... but at different locations . Compoundheterozygosity reflects the diversity of the mutation base ... for a homozygous individual with the classic symptoms of the disease. As a result, compound heterozygotes often become ill later in life, with less severe symptoms. Although compoundheterozygosity ... disease Compoundheterozygosity is one of the causes of variation in genetic disease. The diagnosis ... is caused not by compoundheterozygosity, but rather by the fact that several different enzyme defects ..., diet, and behaviors such as alcohol consumption. Compound heterozygotes are often observed only through subclinical symptoms such as excess iron. Disease is rarely observed in such compound heterozygotes unless other causal factors such as alcoholism are present. As a result, compoundheterozygosity ... disorders, compoundheterozygosity is responsible for variant forms. For example, both TSD and Sandhoff .... ref cite journal title Compoundheterozygosity in nonphenylketonuria hyperphenylalanemia The contribution ... of compoundheterozygosity between two alleles, one which would cause the classic infantile disease ... and compoundheterozygosity for hemoglobin S and hemoglobin Quebec Chori author Witkowska HE Lubin BH ... 16 date 1991 10 17 pages 1150 1154 pmid 1891024 ref References Reflist DEFAULTSORT CompoundHeterozygosity .... That is, an organism is a compound heterozygote if it has two recessive alleles for the same gene ... mutation that is widespread in some population. In its compound heterozygous forms, the disease may ... pmid 18199861 ref But at each gene locus associated with the disease, there is the possibility of compoundheterozygosity, often caused by inheritance of two unrelated alleles, of which one is a common ... title Compound heterozygous hemochromatosis genotype predicts increased iron and erythrocyte indices ... analysis of the genome was not yet possible, but protein sequencing revealed cases caused by compound ... more details
Loss of heterozygosity LOH in a Cell biology cell is the loss of normal function of one allele of a gene in which the other allele was already inactivated. This term is mostly used in the context of oncogenesis after an inactivating mutation in one allele of a tumor suppressor gene occurs in the parent s germline cell , it is passed on to the zygote resulting in an offspring that is heterozygous for that allele. In oncology, loss of heterozygosity occurs when the remaining functional allele in a somatic cell of the offspring becomes inactivated by mutation. This could cause a normal tumor suppressor to no longer be produced which could result in tumorigenesis. In cancer It is a common occurrence in cancer , where it indicates the absence of a functional tumor suppressor gene in the lost region .... Loss of heterozygosity does not imply a reversal to the homozygous state. Knudson two hit hypothesis ..., Lin M, Park Y, Hao K, Zhao X, Garraway LA, et al. Inferring loss of heterozygosity from unpaired tumors ..., Burkhardt T, Gardina P, Turpaz Y, Cowell JK. Comprehensive analysis of loss of heterozygosity events ... loss of heterozygosity events in individual cells almost invariably lead to the development of this retinal cancer in the young child. Breast Cancer and BRCA1 2 The genes BRCA1 and BRCA2 show loss of heterozygosity ... that produce proteins which regulate the DNA repair pathway by binding to Rad51. Detection Loss of heterozygosity can be identified in cancers by noting the presence of heterozygosity at a genetic locus genetics locus in an organism s germline DNA , and the absence of heterozygosity at that locus in the cancer ... significance of loss of heterozygosity in childhood acute lymphoblastic leukemia Nature http www.nature.com modpathol journal v20 n11 full 3800951a.html Loss of heterozygosity identifies genetic ... Mapping loss of heterozygosity in normal human breast cells from BRCA1 2 carriers BJC http www.nature.com jid journal v127 n8 full 5700783a.html Loss of Heterozygosity Studies on Chromosome ... more details
wiktionary Compound may refer to Chemical compound s, combinations of two or more elements Compound enclosure , a cluster of buildings having a shared purpose, usually inside a fence or wall Compound fortification , a version of the above fortified with defensive structures Compound bow , a type of bow for archery Compound linguistics , a word that consists of more than one radical element Compound migrant labour , a hostel for migrant workers such as those historically connected with mines in South Africa Compound music , an attribute of an interval or time signature Compounding , the mixing of drugs in pharmacy Polyhedral compound , a polyhedron composed of multiple polyhedra sharing the same centre of attention Compond may also refer to Compound chocolate , a chocolate substitute Compound fracture , complete fractures of bone where at least one fragment has damaged the skin, soft tissue or surrounding body cavity Compound interest , unpaid interest that is added to the principal so that subsequent interest is calculated on the grossed amount Compound engine , a steam engine in which steam is expanded through a series of two or three cylinders before exhaust. Turbo compound engine , an internal combustion engine where exhaust gases expand through power turbine s Compound sentence linguistics , a type of sentence made up of two or more independent clauses and no subordinate dependent clauses See also Composite disambiguation disambiguation de Mischung eo Kompona o fr Composite fr Composition lt Junginys nl Composiet ja ru simple Compound uk ... more details
Compound S may refer to Cortodoxone Zidovudine , by trade name disambig Short pages monitor This long comment was added to the page to prevent it from being listed on Special Shortpages. It and the accompanying monitoring template were generated via Template Long comment. Please do not remove the monitor template without removing the comment as well. ... more details
. In response to complaints of illegal paintball games within the compound, the Palm Bay City Council ... Bay http oldpalmbay.com DEFAULTSORT Compound Category Palm Bay, Florida Category Geography of Brevard ... more details
Compound meter may refer to Meter music Compound meter Compound meter music Compound meter water meter Disambig Long comment to avoid being listed on short pages ... more details
Compound option or split fee option ref http www.smartprofitsreport.com glossary caputoption.html Glossary of Option Terms Caput Option ref ref http www.amex.com servlet AmexFnDictionary?pageid display&titleid 5606 Split Fee Option ref is option on an option. The exercise payoff of a compound option involves the value of another option. A compound option then has two Expiration options expiration dates and two strike price s. Usually, compounded options are used for currency or fixed income markets where insecurity exists regarding the option s risk protection. Another common business application that compound options are used for to hedge bids for business projects that may or may not be accepted. Variants Compound options provide their owners with the right to buy or sell another option. These options create positions with greater leverage than do traditional options. There are four basic types of compound options ref http www.investopedia.com terms c compoundoption.asp Compound Option ref Call on Call CoC Call on Put CoP or caput option Put on Put PoP Put on Call PoC References Reflist External links http www.global derivatives.com index.php?option com content&task view&id 31&Itemid 31 Compound Options http www.pstat.ucsb.edu faculty fouque PubliFM compound.pdf Evaluation of compound options using perturbation approximation http www.montegodata.co.uk Consult Compound compound.htm COMPOUND OPTION Calculator Derivatives market Category Options ... more details
Unreferenced auto yes date December 2009 File Trisodium phosphate.png right thumb 100px Sodium phosphate , Na sub 3 sub PO sub 4 sub , is a ternary compound. In chemistry , a ternary compound is a compound containing three different elements. An example of this is sodium phosphate , Na sub 3 sub PO sub 4 sub . The sodium ion has a charge of 1 and the phosphate ion has a charge of 3 . Therefore, three sodium ions are needed to balance the charge of one phosphate ion. Another example of a ternary compound is calcium carbonate CaCO sub 3 sub . See also Binary compound DEFAULTSORT Ternary Compound Chemistry stub Category Chemical compounds ja ... more details
Unreferenced stub auto yes date December 2009 Orphan date December 2009 A generalized compound is a mixture of chemical compound s of constant composition, despite possible changes in the total amount. The concept is used in the Dynamic Energy Budget theory, where biomass is partitioned into a limited set of generalised compounds, which contain a high percentage of organic compound s. The amount of generalized compound can be quantified in terms of weight, but more conveniently in terms of C mole s.The concept of strong homeostasis has an intimate relationship with that of generalised compound. DEFAULTSORT Generalised Compound Category Metabolism Chemistry stub ... more details
Unreferenced date December 2009 Image Swedish protected compound sign.PNG thumb Swedish sign for an officially designated secure compound In military science , a compound is a type of fortification made up of walls or fences surrounding several buildings in the center of a large piece of land. The walls can either serve the purpose of being tall, thick, and impenetrable, in which case they would be made of wood, stone, or some other like substance or dangerous to attempt to scale, in which case they could be made of barbed wire or electrified. Compounds can be designed to double as living spaces and military structures in the middle of hostile territory or as a military area within a country s territory they are also used by the extremely wealthy, powerful, Paranoia paranoid or criminal to protect against threats to themselves or their property. A number of survivalist s own fortified compound like structures as a means of protection for when they perceive that civilization has broken down or that their government has become abusive. The term compound is also used to refer to an unfortified enclosure, especially in Africa and Asia . See compound enclosure . See also Stockade Boma enclosure Compound enclosure gated community DEFAULTSORT Compound Fortification Category Fortification by type it Compound nl Compound leefgemeenschap sv Skyddsobjekt ... more details
A compound turbine is a steam turbine in which there are two casings, a high pressure casing and a low pressure casing, operating in concert to extract work from a single source of steam. The steam is partially expanded in the high pressure casing, then exhausted to the low pressure casing. Tandem compound or cross compound The rotor arrangement can be either tandem compound in which the two axle s are joined end to end, or cross compound in which the two turbines have separate axles. In the cross compound case two separate generator device generators are usually supplied, although a gearbox can reduce this to one. Advantages The principal advantages of compound turbines are the reduction in size of any one casing, the confinement of the highest pressure to the smaller casing which may be made of stronger and more expensive materials and the possibility of divided flow in the low pressure casing for the purpose of equalizing end thrusts. See also Pressure compounding in turbines References Unreferenced date January 2008 Category Steam turbines mech engineering stub ... more details
Orphan date April 2011 Unreferenced date July 2009 A compound device is like an internal USB hub often implemented in software on the device , which allows various sub devices to connect. This arrangement is used by wireless receivers for Alphanumeric keyboard cordless keyboard s and Mouse computing mice where the mouse and keyboard are separate devices connected to the compound device and sometimes for computer printer printer s which have card slots. DEFAULTSORT Compound device Category Universal Serial Bus ... more details
unreferenced date November 2009 Compound when applied to a human habitat refers to a cluster of building s in an enclosure, having a shared or associated purpose, such as the houses of an extended family e.g. the Kennedy Compound for the Kennedy family . The enclosure disambiguation enclosure may be a wall , a fence , a hedge barrier hedge or some other structure, or it may be formed by the buildings themselves, when they are built around an open area or joined together. In the United Kingdom , compound is not generally used in the sense of an unfortified enclosure, and not for homes. There, as in North American English , if used for a place, it is most likely to be taken to mean a fortified Compound fortification military compound . The unfortified enclosure usage was developed by the British Empire in Asia and Africa . Now it has slightly different meanings among English speaking people in those continents In Asia it refers to a collection of business establishments or living quarters, especially those used by Europe ans. In Africa it used to mean a collection of workers houses, but is now used for any cluster of related or linked homes, especially residences for members of the same family or those working for the same employer, or those belonging to a farm, or the cluster of houses known in Africa as a Homestead small African settlement homestead . The term can also be applied to an establishment such as a school or business , as in the school compound or the factory compound . In the English language in Africa English dialects of some African countries , compound may refer to a much larger collection of dwellings, as a synonym for a homogeneous township or suburb comprising homes of similar character usually built as public housing projects, or for a shantytown . An example is Chawama Compound , Lusaka , Zambia. See also Compound fortification Boma enclosure Kraal Osama bin Laden s hideout compound Category Human habitats Category Fences ... more details
For pipe joint compound Pipe dope refimprove date April 2009 Image jointcompound.jpg thumb right 285px A bucket of joint compound File Drywall.jpg thumb right Drywall with joint compound applied. Joint compound also known as drywall compound is a white substance similar to plaster used to seal joints between sheets of drywall , primarily in building construction. It is often referred to simply as mud . Ready mix lightweight joint compound Ready mix lightweight joint compound is a pre made form of joint compound designed for fast application and easy maintenance. The compound is a complex combination of water , limestone , expanded perlite , ethylene vinyl acetate polymer and attapulgite . This delicate mixture of compounds gives it a very creamy texture which allows it to spread onto surface with great ease. Usage Ready mixed joint compound is most commonly used in hanging drywall for new .... When used for new walls, joint compound effectively eliminates all blemishes from the surface of the drywall, such as drilled in screws, hanging tape, or drywall tape. Joint compound can be used ..., tears, and other minor damages. Ready mix joint compound is usually more forgiving than the traditional form of joint compound. It can be used for as long of a period of time as needed, and does not dry up unless left unattended for a long period of time. Traditional mix it yourself joint compound ... referred to as drywall taping mud, joint compound is the primary material used in the drywall industry by a tradesperson , or applicator, called a taper or drywall taper. A similar compound is used ... been pre sealed and coated with joint compound. The flexibility and plastic qualities of joint compound ... and trowelled joint compound on gypsum panels is a standard construction technique for painted wall ..., it is best to apply topping compound for finish layer s that level and sand more evenly. Both ... compound mixes manufactured prior to the 1980s often contained a complex mixture of several substances ... more details
Orphan date January 2012 Compound 48 80 is a polymer produced by the condensation reaction condensation of N methyl p methoxyphenethylamine with formaldehyde . ref http www.sigmaaldrich.com catalog ProductDetail.do?N4 C2313 7CSIGMA&N5 SEARCH CONCAT PNO 7CBRAND KEY&F SPEC Compound48 80 at Sigma Aldrich ref It promotes histamine release. ref cite journal journal Br J Pharmacol year 1970 volume 38 issue 1 pages 253 262 title Mechanisms of histamine release by compound 48 80 author A. M. Rothschild pmid 4189829 pmc 1702640 ref In biochemical research, compound 48 80 is used to promote mast cell degranulation . References reflist Category Polymers biochem stub zh Compound 48 80 ... more details
about compound documents in general the W3C standard Compound Document Format confusing date September 2011 In computing , a compound document is a document type typically produced using word processor word processing software, and is a regular text document intermingled with non text elements such as spreadsheet s, picture s, digital video s, digital audio , and other multimedia features. It can also be used to collect several documents into one. Compound document technology technologies are commonly utilized on top of a software componentry framework, but the idea of software componentry includes several other concepts apart from compound documents, and software components alone do not enable compound documents. Well known technologies for compound documents include ActiveX Document s Bonobo computing Bonobo by Ximian primarily used by GNOME KPart s in KDE Object linking and embedding OLE by Microsoft Open Document Architecture from ITU T not used OpenDoc by Apple Computer now defunct http sourceforge.net projects verdantium Verdantium XML and Extensible Stylesheet Language XSL are encapsulation formats used for compound documents of all kinds Since many documents contain non text elements such as spreadsheet s, picture s, digital video s, digital audio , and other multimedia features is of critical importance to mitigate the risks of undetected and unapproved changes. Software based compound document comparison compares the entire document granularly, including the native format ... coding or highlighting the changes granularly. Compound document comparison can be used on any document ... based compound document comparison is held by Lit ra Technology LLC. ref Massand, Deepak, Assignee Lit ra Technology LLC, McLeansville, NC. 2006. Method of compound document comparison. U.S. Patent 7,818,660, filed January 2006, and issued October 19, 2010. ref While the origins of the compound document ... Transclusion Compound Document Comparison http www.litera.com products change pro.html dead link ... more details
A polyhedral compound is a polyhedron that is itself composed of several other polyhedra sharing a common centre. They are the three dimensional analogs of star polygon Star figures polygonal compound s such as the hexagram . Neighbouring vertices of a compound can be connected to form a convex polyhedron called the convex hull . The compound is a facetting of the convex hull. Another convex polyhedron is formed by the small central space common to all members of the compound. This polyhedron can be considered the core for a set of stellation s including this compound. See List of Wenninger polyhedron ... stellations. Regular compounds A regular polyhedron compound can be defined as a compound which ... group Symmetry Dual Compound of two tetrahedra , or stella octangula Image Compound of two tetrahedra.png 100px Cube geometry Cube Octahedron style text align center O sub h sub Self dual Compound of five tetrahedra , or chiro icosahedron Image Compound of five tetrahedra.png 100px Dodecahedron ... chiral twin Compound of ten tetrahedra , compound of two chiro icoshedra, or icosiicosahedron Image Compound of ten tetrahedra.png 100px Dodecahedron Icosahedron style text align center I sub h sub Self dual Compound of five cubes , or rhombihedron Image Compound of five cubes.png 100px Dodecahedron Rhombic triacontahedron style text align center I sub h sub Compound of five octahedra Compound of five octahedra , or small icosiicosahedron Image Compound of five octahedra.png 100px Icosidodecahedron Icosahedron style text align center I sub h sub Compound of five cubes Best known is the compound ... of the two an octahedron , which shares the same face planes as the compound. Thus it is a stellation ... be regarded as a Dual regular compounds dual regular compound . The compound of five tetrahedra comes in two chirality mathematics enantiomorph ic versions, which together make up the compound of 10 tetrahedra. Each of the tetrahedral compounds is self dual, and the compound of 5 cubes is dual to the compound ... more details
The term compound fruit is not used in technical botany botanical writing, but is sometimes used when it is not clear which of several fruit types is involved. A compound fruit is composed of two or more similar parts . ref cite book author Hickey, M. King, C. date 2001 title The Cambridge Illustrated Glossary of Botanical Terms publisher Cambridge University Press others translated by ref image Frambozenkever.jpg thumb left A raspberry is an aggregate fruit Image Pineapple and cross section.jpg thumb A pineapple is a multiple fruit. Image Kumato 02.jpg thumb A tomato is a simple fruit derived from a compound ovary. A compound fruit may be An aggregate fruit , in which one flower contains several separate ovaries, which merge together during development. A multiple fruit , in which several flowers, each with an ovary, develop into small fruits that are clustered or fused together into a larger fruit. A simple fruit formed from a Gynoecium Carpel morphology compound ovary . Grape s grow in clusters, but are not compound fruits. Each grape is grown from one ovary in one flower, and each grape remains an independent fruit. References reflist fruits Category fruit morphology ar cs Souplod de Sammelfrucht et Koguvili hi no Samfrukt pl Owoc zbiorowy ru sk S plodie sr sv Fruktf rband uk zh ... more details
in Compound Management for High Throughput Screening date 2004 12 01 volume 2 issue 6 pages ... often involved in fetching chemicals, and quality control of the storage environment is called Compound Management or Compound Control. Compound Management is often a significant expense, as well as career ... journal Drug Discovery World date Spring 2003 author Ian Yates title Compound Management Comes of Age pages 35&ndash 42 format PDF url http www.ddw online.com data pdfs compound 20management.pdf ref There are many books and journal articles devoted entirely or in part to compound management. ref cite book title Industrialization of Drug Discovery author Jeffrey S. Handen chapter Compound Management ... to be faced in the necessity of compound management, which are being surmounted by concerted efforts ... The challenge of compound management journal Modern Drug Discovery date January February 1999 ... compound management platform, in order to serve over 200,000 different compounds. ref cite journal author Adam Yasgar et al. title Compound Management for Quantitative High Throughput Screening journal ...?artid 2390859&blobtype pdf ref In short, Compound Management requires inventory control ... compounds contained in compound libraries can number in the millions, making compound management and compound control important contributors to research and drug discovery . Outsourcing Because of the significant expenses and infrastructure required for accurate compound management space ... significant experience in compound management due to the complexity of tracking not only inventory data, but also compound location, storage conditions, and compound integrity. This experience also ... conferences related to compound management. The best known is Compound Management & Integrity ref ... 20 20UK .htm Conference Compound Management & Integrity 2009 ref although many chemistry and pharmaceutical ... more details
Image Cyclopropane.png thumb 150px right Cyclopropane is the smallest alicyclic compound. An alicyclic compound is an organic compound that is both Aliphatic compound aliphatic and cyclic compound cyclic . They contain one or more all carbon rings which may be either saturation chemistry saturated or unsaturated, but do not have aromaticity aromatic character. ref GoldBookRef title Alicyclic compounds file A00216 year 1995 ref Alicyclic compounds may or may not have aliphatic side chains attached. The simplest alicyclic compounds are the monocyclic cycloalkane s cyclopropane , cyclobutane , cyclopentane , cyclohexane , cycloheptane , cyclooctane , cyclononane , cyclodecane , cycloundecane , cyclododecane , and so on. Bicyclic molecule Bicyclic alkanes include bicycloundecane and decalin . Polycyclic compound Polycyclic alkanes include cubane , basketane , and housane . Spiro compound s have two or more rings that are connected through only one carbon atom. An exocyclic group is always shown outside the ring structure, take for instance the exocyclic double bond on the left Image Exocyclic.png 200px Left exocyclic double bond Right regular double bond br style clear both See for an example isotoluene . The placement of double bonds in many alicyclic compounds can be predicted with Bredt s rule . The mode of ring closing in the formation of many alicyclic compounds can be predicted by Baldwin s rules . Cycloalkenes Image Cyclohexene structures.svg thumb right Cyclohexene is an alicyclic compound with a double bond. Monocyclic cycloalkene s are cyclopropene , cyclobutene , cyclopentene , cyclohexene , cycloheptene , cyclooctene , and so on. Bicyclic alkenes include norbornene and norbornadiene . References references Category Organic compounds Category Organic chemistry ar ca Compost alic clic cs Alicyklick slou eniny de Alicyclische Verbindungen et Alits klilised hendid el fa fr Compos alicyclique he ... more details
For machine tool coolant cutting fluid orphan date May 2010 Unreferenced stub auto yes date December 2009 Cutting compound consists of an abrasive suspended in a paste. Like most abrasives, it comes in various grit size grit sizes dependent upon how much matter is to be removed. It is used on automotive paintwork to cut through abrade oxidise d paint or to polishing polish out scratches in the paintwork. The oxidised paint is duller than fresh paint and the cutting compound is used to expose this fresher surface. Modern automotive painting often includes a thin, transparent protective coating on which cutting compound should not be used. Cutting is not something that should necessarily be done often as it will eventually strip all the paint from the surface, which both is less appealing and offers less chemical resistance. Wax ing to protect the newly exposed surface is an important part of maintenance. DEFAULTSORT Cutting Compound Category Automobile maintenance Automotive stub ... more details
Orphan date September 2008 The Compound shutter is a mechanical leaf shutter for photographic camera s introduced in the late 19th century, usually used between lens components. A typical Compound shutter may have settings for T Time , B Bulb , and times from 1 second down to 1 100th or less. Unlike later mechanical shutters such as the Compur which use a clockwork mechanism, shutter timing is achieved by releasing air from a small cylinder typically mounted horizontally at the top of the shutter through a small aperture. A cam turned by the shutter speed dial positions a piston in the cylinder to provide the correct exposure. When the shutter release is pressed the shutter opens and air in the cylinder is gradually released, letting the piston move it closes the shutter when it reaches the end of its travel. The piston travels for a very short distance at the higher speeds, making their accuracy very sensitive to the precise manufacturing of the cam lower speeds are more reliably accurate. http www.skgrimes.com compound index.htm Compound Shutters for Large Format Photographers photography stub Category Photographic shutters ... more details
A compound modifier also called a compound adjective or a phrasal adjective or adjectival phrase is a English compoundcompound of two or more attributive words That is, more than one word that together modify a noun. Compound modifiers are grammatically equivalent to single word modifier s, and can be used in conjunction with other modifiers. The constituent words of compound modifiers need not be adjectives ... are also common man eating and one way . The punctuation of compound modifiers in English depends ... hyphenated , whereas the same compound used as a Predicate grammar predicate will typically not be. Compound adjectives Compound adjective s, like normal adjectives, modify noun phrases. Grammatically, there is no difference between hot metal and white hot metal the latter is a compound adjective ... or other types of words modifying a noun phrase are necessarily parts of one or more compound adjectives ..., and with the support of modern writing guides, compound modifiers that appear before a noun ... See English compounds Hyphenated compound adjectives Major style guides advise consulting a dictionary to determine whether a compound adjective should be hyphenated the dictionary s hyphenation should be followed even when the compound adjective precedes a noun. ref name MLA cite book editor1 ... oclc doi id page pages at section 4.13 trans chapter chapter chapterurl quote Hyphenation. Compound words take many forms. ... The dictionary is an excellent guide for such decisions. ... When a compound can be found in the dictionary, its usage is established and it is known as a permanent compound ... trans title url http books.google.com books?id 7C6V9zRxSPkC&pg PA73&dq 22permanent compound ... compound adjectives are usually written as they appear in the dictionary even when they follow the noun ... in other unambiguous, regularly used compound adjectives. ref name Chicago780 cite book title ...." Exceptions It may be appropriate to distinguish between compound modifiers whose adverb ... more details
In chemistry , a cyclic compound is a chemical compoundcompound in which a series of atoms is connected to form a loop or ring. ref JerryMarch ref While the vast majority of cyclic compounds are organic compound organic , a few inorganic substances form cyclic compounds as well, including sulfur, silanes, phosphanes, phosphoric acid, and triboric acid. Cyclic compounds may or may not be Aromaticity aromatic . Benzene is aromatic while cyclohexane is not. The term polycyclic is used when more than one ring is formed in a single molecule for instance in naphthalene , and the term macrocycle is used for a ring containing more than a dozen atoms. gallery Image cycloheptane sticks.png Cycloheptane , a non aromatic cyclic compound. Image Benzene bonds.svg Benzene , a cyclic compound. Image Naphthalene.png Naphthalene , a polycyclic compound. Image Porphyrin.svg Porphyrin , a macrocyclic compound. File Pentazole.png Pentazole , an inorganic cyclic compound. gallery Alicyclic compound Alicyclic compounds are named according to the IUPAC system of nomenclature by attaching the prefix cyclo to the name of the corresponding open chain hydrocarbon possessing the same number of carbon atoms. The common names resemble the IUPAC names. For example Cyclo pentane, cyclo butane etc.... Ring closing & opening reactions Image Dieckmann Condensation Scheme.png right thumb Dieckmann ring closing reaction Related concepts in organic chemistry are so called ring closing reactions in which a cyclic compound is formed and ring opening reactions in which rings are opened. Examples of ring closing reactions Ring closing metathesis Nazarov cyclization reaction Ruzicka large ring synthesis Dieckmann condensation Wenker synthesis Radical cyclization Example of ring opening reactions A general type of polymerization reaction Ring opening polymerization Ring opening metathesis polymerisation See also open chain compound Ring expansion and ring contraction Macrocycle Effective molarity External links ... more details
Infobox Disease Name Compound nevus Image Skin tumors 201.jpg Caption DiseasesDB ICD10 D22 ILDS D22.L14 ICD9 ICDO 8760 0 OMIM MedlinePlus eMedicineSubj eMedicineTopic MeshID A compound nevus is a type of Melanocytic nevus mole formed by groups of nevus cells found in the Epidermis skin epidermis and dermis the two main layers of tissue that make up the skin . External links http www.cancer.gov Templates db alpha.aspx?CdrID 44274 Compound nevus entry in the public domain NCI Dictionary of Cancer Terms NCI cancer dict Skin tumors, nevi and melanomas Category Benign neoplasms Category Melanocytic nevi and neoplasms Cutaneous condition stub ... more details
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