692 EC, Dec. 2008 385 EC. replacedby status Current The Directive on the restriction of the use of certain hazardoussubstances in electrical and electronic equipment 2002 95 EC Audio En us RoHSDirective.ogg listen commonly referred to as the Restriction of HazardousSubstancesDirective or RoHS ... National Institute of Standards and Technology DEFAULTSORT Restriction Of HazardousSubstancesDirective ... Restriction of HazardousSubstancesDirective fi RoHS direktiivi sv RoHS direktivet th ... of their Restriction of HazardousSubstances RoHS legislation effective June 2009. ref http www.intertek.com .... Prepares for New Restriction of HazardousSubstances Legislation ref However, this may be a moot ...Infobox EU legislation type Directive number 2002 95 EC title Directive on the restriction of the use of certain hazardoussubstances in electrical and electronic equipment madeby European Council Council .... This directive restricts the use of six hazardous materials in the manufacture of various types ... Battery Directive 91 157 EEC ref http europa.eu eur lex en consleg pdf 1991 en 1991L0157 do 001.pdf Council Directive of 18 March 1991 on batteries and accumulators containing certain dangerous substances ... Parliament and of the Council of 27 January 2003 on the restriction of the use of certain hazardous ... Statutory Instrument to Implement the European Directive on the Restriction of the Use of Certain HazardousSubstances in Electrical and Electronic Equipment UK ref Another form of economic ...?uri OJ L 2003 037 0019 0023 EN PDF Eur lex.europa.eu ref The RoHS European Union directivedirective ... Equipment Directive WEEE 2002 96 EC which sets collection, recycling and recovery targets for electrical ... using the directive as a guide. RoHS is often referred to as the lead free directive, but it restricts the use of the following six substances Lead Pb Mercury element Mercury Hg Cadmium Cd Hexavalent ... used as a flame retardant, then the entire radio would fail the requirements of the directive. In an effort ... more details
The HazardousSubstances Data Bank HSDB is a toxicology database on the United States U.S. National Library of Medicine s NLM Toxicology Data Network TOXNET . ref http toxnet.nlm.nih.gov Toxnet.nlm.nih.gov ref It focuses on the toxicology of potentially hazardous chemicals, and includes information on human exposure, industrial hygiene , emergency handling procedures, environmental fate, regulatory requirements, and related areas. All data are referenced and derived from a core set of books, government documents, technical reports, and selected primary journal literature. All entries are peer reviewed by a Scientific Review Panel SRP , members of which represent a spectrum of professions and interests. The HSDB is organized into individual chemical records, and contains over 6000 such records. It is accessible free of charge via TOXNET. Users can search by chemical or other name, chemical name fragment, CAS registry number and or subject terms. Recent additions include radioactive materials and certain mixtures, like crude oil and oil dispersants. References references citation title Fact Sheet HazardousSubstances Data Bank HSDB url http www.nlm.nih.gov pubs factsheets hsdbfs.html publisher National Library of Medicine date September 2006 accessdate 2009 08 29 . External links http toxnet.nlm.nih.gov cgi bin sis htmlgen?HSDB HSDB search http toxnet.nlm.nih.gov TOXNET http toxnet.nlm.nih.gov cgi bin sis search r?dbs hsdb term na permethrin 5D HSDB Sample Record Category Chemical safety Category Toxicology Category Chemical databases med toxic stub ... more details
No 1272 2008 br from 1 June 2015 status Current The Dangerous SubstancesDirective ref Full title Council Directive 67 548 EEC of 27 June 1967 on the approximation of laws, regulations and administrative provisions relating to the classification, packaging and labelling of dangerous substances ... SubstancesDirective 67 548 EEC. ref The European Court of Justice ruled in 1985 that Directive 67 548 EEC applies only to pure substances, not preparations http eur lex.europa.eu LexUriServ ... 1985 3013. ref The Directive does not apply to the following groups of substances and preparations ... of dangerous substances or preparations. Classification of dangerous substances Art. 2 of the Directive ... of substances listed in Annex I of the Directive is maintained by the Institute for Health and Consumer ... For substances listed in Annex I, the words EEC label . Material safety data sheet Art. 27 of the Directive ... on dangerous substances Includes a nonofficial consolidated August, 2008 version of the directive Use dmy dates date January 2011 DEFAULTSORT Dangerous SubstancesDirective 67 548 Eec Category European ... de Gefahrstoffkennzeichnung fr Signalisation des substances dangereuses hu 67 548 EGK ir nyelv ja Directive ...Infobox EU legislation type Directive number 67 548 EEC title Directive on the approximation of laws ... substances EEA yes madeby Council of the European Union Council madeunder Wikisource The Treaty ... in Oporto, 1992 05 02 came into force 1994 01 01. ref and compliance with the Directive will ensure ... 2005 of the Federal Interior Ministry on the official classification and labelling of substances SR ... ch i rs 8 813.11.it.pdf Italian . ref Scope of the Directive The Directive applies to pure ... , therefore it does not apply directly to substances created purely for research purposes. Additional rules concerning preparations are contained in the Dangerous Preparations Directive 1999 45 EC ... PDF Directive 1999 45 EC of the European Parliament and of the Council of 31 May 1999 concerning the approximation ... more details
Unreferenced stub auto yes date December 2009 The Planning HazardousSubstances Act 1990 was an Act of Parliament in the United Kingdom to consolidate certain enactments relating to special controls in respect of hazardoussubstances with amendments to give effect to recommendations of the Law Commission . UK legislation Category United Kingdom Acts of Parliament 1990 Category United Kingdom planning law UK law stub Statute stub UK planning stub ... more details
Infobox NZ Legislation short title HazardousSubstances and New Organisms Act 1996 long title HazardousSubstances and New Organisms Act 1996 introduced by date passed 1996 royal assent commencement amendments related legislation status Current The HazardousSubstances and New Organisms Act HSNO was an Act of Parliament passed in New Zealand in 1996 .The Act is administered by the Environmental Risk Management Authority . External links http www.legislation.govt.nz libraries contents om isapi.dll?clientID 2506748008&infobase pal statutes.nfo&record 6156CE5F &hitsperheading on&softpage DOC New Zealand Government text of the HSNO Act. http www.mfe.govt.nz laws hsno.html HazardousSubstances and New Organisms gateway website. http www.ermanz.govt.nz Environmental Risk Management Authority ERMA New Zealand Category New Zealand Statutes Category Environmental law in New Zealand Category 1996 in New Zealand Category 1996 in law de Gefahrstoffverordnung kiwi stub statute stub ... more details
The National Oil and HazardousSubstances Pollution Contingency Plan , more commonly called the National Contingency Plan or NCP , is the United States federal government s blueprint for responding to oil spill s and hazardous substance releases. It documents national response capability and is intended to promote overall coordination among the hierarchy of responders and contingency plans. ref name EPAEM http www.epa.gov oem content lawsregs ncpover.htm National Oil and HazardousSubstances Pollution Contingency Plan Overview , U.S. Environmental Protection Agency . Accessed November 19, 2009. ref The first National Contingency Plan was developed and published in 1968 in response to a massive ... of drinking water supplies or sensitive ecosystems, high levels of hazardoussubstances in soils, weather conditions that may cause migration or release of hazardoussubstances, the threat of fire ... of hazardoussubstances. http www.epa.gov oem content lawsregs ncpover.htm . References reflist Category ..., the NCP was revised the following year to include a framework for responding to hazardous substance ... was broadened to cover releases at hazardous waste sites requiring emergency removal actions. Over ... should 1 Plan for emergencies and develop procedures for addressing oil discharges and releases of hazardoussubstances, pollutants, or contaminants 2 Coordinate their planning, preparedness, and response ... when the Administrator or Secretary determines that any oil or CWA hazardous substance is discharged ... a ref Major Revisions to 40 CFR Part 300 1968 Initial plan ref name EPAEM 1973 Added provisions for hazardoussubstances ref name EPAEM 1980 circa revised to reflect CERCLA provisions ref name EPAEM 1990 ... of oil or hazardous waste, providing guidance to Regional Response Teams, coordinating a national program ..., or by the OSC in consultation with EPA representatives. Hazardous Substance Removals 300.415 b Authorizes the lead agency to initiate appropriate removal action in the event of a hazardous substance ... more details
wiktionarypar restrictionRestriction may refer to Restriction mathematics , an aspect of a Function mathematics Restrictions and extensions mathematical function Restrictions album Restrictions album , an album by Cactus Restriction enzyme , a type of enzyme that cleaves genetic material Restriction, a term in medieval Supposition theory See also Regulation Racial segregation Religious segregation Restrictive covenant Regression analysis disambig de Restriktion fr Restriction ru ... more details
wiktionarypar directiveDirective may refer to Directive European Union , a legislative act of the European Union Directive poem , a highly acclaimed poem by Robert Frost Directives, used by United States Government agencies particularly the United States Department of Defense to convey policies, responsibilities, and procedures Directive programming in a computer program or associated with compiling a program A particular kind of speech act which causes the hearer to take a particular action disambig ca Directiva fr Directive it Direttiva lv Direkt va noz mju atdal ana lt Direktyva ru sk Smernica ... more details
Environmentally hazardous is a chemical hazard, where significant damage to the environment is caused by a chemical substance. It is defined in the Globally Harmonized System and in the European Union chemical regulations. The label is particularly applicable towards substances with aquatic toxicity. An example is zinc oxide , a common paint pigment, which is extremely toxic to aquatic life. Toxicity or other hazards do not imply an environmental hazard, because elimination by sunlight photolysis , water hydrolysis or organisms biological elimination neutralizes many reactive or poisonous substances. Persistence towards these elimination mechanisms combined with toxicity gives the substance the ability to do damage in the long term. Also, the lack of immediate human toxicity does not mean the substance is environmentally nonhazardous. For example tanker truck sized spills of substances such as milk can cause a lot of damage in the local aquatic ecosystems. Category Hazards it Pericoloso per l ambiente ... more details
being installing a barrier along the foundation of the landfill to contain the hazardoussubstances ... may have specific waste codes. For example, California Department of Toxic and HazardousSubstances ...File hazardous waste bottle.JPG thumb Hazardous waste bottle in a chemical lab refimprove date February 2010 Cleanup date November 2008 High Priority Globalize US date March 2011 A hazardous waste is waste ... environmental laws see Resource Conservation and Recovery Act hazardous wastes fall into two .... Managing Hazardous Materials. Institute of Hazardous Materials Management pp.422 423 ref Characteristic hazardous wastes are materials that are known or tested to exhibit a hazardous trait such as ignitability i.e., flammable reactive reactivity corrosive corrosivity toxic ity In the U.S., hazardous ... in previous definitions are subsets of these four primary characteristics Listed hazardous waste are materials specifically listed by the EPA or State as a hazardous waste. Hazardous wastes listed ... cleanup residues of acute hazardous waste chemicals P listed and other chemicals U listed These wastes may be found in different physical states such as gaseous, liquids, or solids. Furthermore, a hazardous ... to prevent harm. Regulatory history Resource Conservation and Recovery Act RCRA Modern hazardous ... keeping for hazardous wastes. Hazardous wastes must be tracked from the time they are generated until their final disposition. RCRA s record keeping system helps to track the life cycle of hazardous waste and reduces the amount of hazardous waste illegally disposed. Comprehensive Environmental ... and provided for the clean up and remediation of closed and abandoned hazardous waste sites. Before this act was created, hazardous wastes were being disposed in regular landfills until scientists measured unfavorable amounts of hazardous materials seeping into the ground. These chemicals eventually ... hazardous waste solidification stabilization A Review. In Journal of Hazardous Materials B137 pp.267 ... more details
Use dmy dates date December 2010 Infobox Single See Wikipedia WikiProject Songs Name Hazardous Cover Vanessa Amorosi Hazardous Single.jpg Artist Vanessa Amorosi Album Hazardous album Hazardous Released start date 2009 12 11 df yes small Australia small Format Music download Digital download , CD single CD Recorded Fishhead Music Studios, Gothenburg , Sweden Genre Pop rock , electropop , dance pop Length Label Universal Music Group Universal Writer V. Amorosi, Stefanie Ridel singer Stefanie Ridel , Stuart Crichton, T. James Producer Certification Last single This Is Who I Am song This Is Who I Am br 2009 This single Hazardous br 2009 Next single Mr. Mysterious br 2010 Misc Hazardous is the title track and second single to be taken from Vanessa Amorosi s studio album Hazardous . Hazardous was released on 11 December 2009 in Australia. Track listing CD single ref http www.jbhifionline.com.au music pop rock hazardous 472529 JB HI FI HAZARDOUS Amorosi, Vanessa ref Hazardous 3 26 This Is Who I Am The Lonewolf Version 5 54 Hazardous The MachoString Remix 3 41 Hazardous The MotorPsycho Club Remix 3 57 The iTunes Australia digital EP includes a bonus remix Hazardous The MachoPsycho Hookey Remix 3 49 Charts The song was the 3rd most added track to Australian radio in its debut week of release. ref http www.aumreport.com news.html Australian Music Report Chart News ref class wikitable sortable Chart 2009 Peak br position singlechart Australia 29 song Hazardous artist Vanessa Amorosi Australian Airplay Chart ref http www.aumreport.com amr100.html Australian Music Report Weekly Hot 100 CHART WEEK ENDING DATE 19 December 2009 ref align center 18 Release history class wikitable Country Release ... 2729648 ref http www.sanity.com.au ProductDetail.aspx?id 268104 Sanity Buy Hazardous Vanessa Amorosi, Rock & Pop, CD Singles ref References Reflist Vanessa Amorosi DEFAULTSORT Hazardous Song Category 2009 singles Category Vanessa Amorosi songs uk Hazardous ... more details
globalize USA date November 2009 In pharmacology , hazardous drugs are drugs that are known to cause wikt Genotoxic genotoxicity , which is the ability to cause a change or mutation in genetic material wikt Carcinogenicity carcinogenicity , the ability to cause cancer in animal models, humans or both wikt Teratogenicity teratogenicity , which is the ability to cause defects on fetal development or fetal malformation and lastly hazardous drugs are known to have the potential to cause fertility impairment, which is a major concern for most clinicians. ref name NIOSH 2004 National Institute for Occupational Safety and Health NIOSH . 2004. NIOSH Publication N. 2004 165 http www.cdc.gov niosh docs 2004 165 ref These drugs can be classified as antineoplastic s , cytotoxic agents, biologic agents, antiviral agents and immunosuppressive agents. This is why safe handling of hazardous drugs is crucial. Safe handling Safe handling refers to the process in which health care workers adhere to evidence based practices EBP set forth by national organizations, that have been designed to eliminate or significantly reduce occupational exposure. Some of these practices include but are not limited to, donning of personal protective equipment such as a disposable gown, gloves, masks and the utilization ... throughout the three phases of contact with the hazardous drugs. These phases are drug preparation, administration and disposal. Research has shown that while compounding hazardous drugs in a Class ... is viewed as one of safest measures to prevent hazardous drug exposure from coming in contact with a clinician s working environment. ref Oncology Nursing Society ONS . 2003. Safe handling of hazardous ... adequate protection against workers handling hazardous drugs NIOSH states that ... measurable concentrations of some hazardous drugs have been documented in the urine of health care workers who prepared ... IARC Classification of Hazardous Drugs http isopp.org International Society of Oncology Pharmacy ... more details
Unreferenced date July 2010 Infobox Album See Wikipedia WikiProject Albums Name Hazardous Mutation Type studio Longtype Artist Municipal Waste band Municipal Waste Cover MWHazardous.jpg Released September 20, 2005 Recorded Genre Thrash metal br Crossover thrash Length 26 06 Label Earache Records Producer Reviews Allmusic Rating 4 5 Allmusic class album id r796269 pure url yes link Blabbermouth.net rating 8 10 http www.roadrunnerrecords.com blabbermouth.net showreview.aspx?reviewID 378 link Stylus Magazine B http www.stylusmagazine.com reviews municipal waste hazardous mutation.htm link Last album Waste em All br 2003 This album Hazardous Mutation br 2005 Next album The Art of Partying br 2007 Hazardous Mutation is the second full length album from the thrash metal band, Municipal Waste band Municipal Waste . It is also the band s debut on Earache Records . Its main theme is zombies and other monsters . It was also released as a special edition with a bonus live DVD. Track listing Intro Deathripper 2 19 Unleash the Bastards 1 57 The Thing 1 53 Blood Drive 1 13 Accelerated Vision 1 26 Guilty of Being Tight 1 53 Set to Destruct 2 01 Hazardous Mutation 1 20 Nailed Casket 1 36 Abusement Park 1 00 Black Ice 0 24 Mind Eraser 2 17 Terror Shark 1 43 The Thrashin of the Christ 2 30 Bangover 2 38 Bonus live DVD Intro Deathripper Drunk as Shit Mind Eraser Unleash the Bastards The Thrashin of the Christ Sweet Attack Mutants of War Blood Drive Accelerated Vision New Song Terror Shark Toxic Revolution Substitute Creature Waste Em All Bangover Cover Art The cover art was done by Ed Repka , who has done artwork for other metal bands such as Megadeth , Death metal band Death , Massacre metal band Massacre , Nuclear Assault , Merciless Death , etc. The cover is related to the song Hazardous Mutation , in which people without chemical suits are turned into mutants. The surviving humans are being ... metal album stub fr Hazardous Mutation sv Hazardous Mutation ... more details
Infobox Album See Wikipedia WikiProject Albums Name Hazardous Type studio Artist Vanessa Amorosi Cover ... World br 2008 This album Hazardous br 2009 Next album Misc Singles Name Hazardous Type studio single 1 This Is Who I Am song This Is Who I Am single 1 date October 9, 2009 single 2 Hazardous song Hazardous single 2 date December 11, 2009 ref http www.getmusic.com.au artist news detail.aspx?nid 1385&aid 26199 Vanessa Amorosi s new album, Hazardous, is her third ARIA Top 10 album ref single 3 Mr ... single 4 date August 13, 2010 Hazardous is the fourth studio album by Vanessa Amorosi , released in Australia ... 11 03 vanessa looking hazardous 17797 Starobserver Vanessa looking hazardous ref Track listing small ... song Holiday writer3 Amorosi, MachoPsycho length3 3 17 title4 Hazardous song Hazardous writer4 Amorosi ... copies. Hazardous song Hazardous Released in December 2009, the song peaked at 29 on the Australian ... on 13 August 2010. Charts and certifications Hazardous debuted at 7 and was certified Gold ref name ... Vanessa Amorosi Hazardous ref class wikitable Chart 2009 Peak br position Certification Sales ref http ... Charts.com Vanessa Amorosi Hazardous ref align center 7 align center Platinum ref name aria ... Vanessa Amorosi UMusic Vanessa Amorosi Hazardous ref Digital download 23 July 2010 ref http www.universal music.de musik vanessaamorosi detail product 162954 0 hazardous Universal Music Vanessa Amorosi Hazardous CD ref CD album United Kingdom 26 July 2010 ref http www.habbo.com articles 1758 meet vanessa ... Island ref http www.amazon.co.uk Hazardous Vanessa Amorosi dp B002UK0B4I ref sr 1 1 278 6060676 2439534?ie UTF8&s music&qid 1280448041&sr 8 1 Amazon.co.uk Hazardous Vanessa Amorosi ref References Reflist ... http canberra.citysearch.com.au music 1137726244937 Vanessa Amorosi Hazardous Citysearch Vanessa Amorosi Hazardous http www.redhotpie.co.uk Article Vanessa Amorosi The RHP Interview 866 RedHotPie ... uk Hazardous ... more details
Mergeto Autoacceleration date August 2009 Radical polymerization of pure styrene causes the viscosity to increase. This retards the deactivation of the free radical s by radical radical reactions, but it does not have such a great effect on the reaction of the radicals with styrene. Hence the concentration of free radicals increases and the rate of reaction increases, which can lead to thermal runaway . While the autoacceleration seen with pure styrene is the classic example taught to chemistry undergraduates , this effect can occur during the polymerization of other monomer s such as methyl methacrylate . http www.chem.rochester.edu chem421 autoac.htm Avoiding thermal runaway is one of the reasons why suspension polymerization is such a popular way of making polystyrene . The droplets dispersed in the water are small reaction vessels, but the heat capacity of the water lowers the temperature rise, thus moderating the reaction. DEFAULTSORT Hazardous Polymerization Category Polymerization reactions Category Chemical safety chem stub ... more details
Banned substances may refer to Illegal drug trade Use of performance enhancing drugs in sport Banned substances in baseball disambiguation Short pages monitor This long comment was added to the page to prevent it being listed on Special Shortpages. It and the accompanying monitoring template were generated via Template Longcomment. Please do not remove the monitor template without removing the comment as well. ... more details
A restriction fragment is a DNA fragment resulting from the cutting of a DNA strand by a restriction enzyme restriction endonucleases , a process called restriction. Each restriction enzyme is highly specific, recognising a particular short DNA sequence, or restriction site, and cutting both DNA strands at specific points within this site. Most restriction sites are Palindromic sequence palindromic , the sequence of nucleotides is the same on both strands when read in the 5 to 3 direction , and are four to eight nucleotide s long. Many cuts are made by one restriction enzyme because of the chance repetition of these sequences in a long DNA molecule, yielding a set of restriction fragments. A particular DNA molecule will always yield the same set of restriction fragments when exposed to the same restriction enzyme. Restriction fragments can be analyzed using techniques such as gel electrophoresis or used in recombinant DNA technology. Image Restriction enzyme.jpg thumb Illustration of typical restriction enzyme cleavage. In recombinant DNA technology specific restriction endonucleases are used that will isolate a particular gene and cleave the sugar phosphate backbones at different points retaining symmetry , so that the double stranded restriction fragments have single stranded ends. These short extensions, called sticky ends can form hydrogen bond ed base pairs with complementary sticky ends on any other DNA cut with the same enzyme such as a bacterial plasmid . In agarose gel electrophoresis , the restriction fragments yield a band pattern characteristic of the original DNA molecule and restriction enzyme used, for example the relatively small DNA molecules of viruses and plasmids can be identified simply by their restriction fragment patterns. If the nucleotide differences of two different allele s occur within the restriction site of a particular restriction enzyme ... isbn 0 8053 7171 0 Category Molecular biology Category Restriction enzymes genetics stub ... more details
Unreferenced date December 2009 Restriction sites , or restriction recognition sites , are locations on a DNA molecule containing specific sequences of nucleotide s, which are recognized by restriction enzyme s. These are generally palindromic sequence s because restriction enzymes usually bind as homodimer s , and a particular restriction enzyme may cut the sequence between two nucleotides within its recognition site, or somewhere nearby. For example, the common restriction enzyme EcoRI recognizes the palindromic sequence GAATTC and cuts between the G and the C on both the top and bottom strands, leaving an overhang an end portion of a DNA strand with no attached complement on each end, of AATT. This overhang can then be used to ligate in see DNA ligase a piece of DNA with a complementary overhang another EcoRI cut piece, for example . References DEFAULTSORT Restriction Site Category Molecular biology fr Sites de restriction it Sito di restrizione ru ... more details
Caloric restriction CR , or calorie restriction , is a Diet nutrition dietary regimen that restricts calorie intake, where the baseline for the restriction varies, usually being the previous, Ad libitum Biology unrestricted , intake of the subjects. Calorie restriction without malnutrition ref cite journal ... Restriction and Aging Studies in Mice and Monkeys journal Toxicologic Pathology volume 37 issue ... lifespan of the species. Calorie restriction is a feature of several Diet nutrition dietary regimens ... and Weindruch were summarized in their book The Retardation of Aging and Disease by Dietary Restriction .... In the meantime, many people have independently adopted the practice of calorie restriction in some ... Long term calorie restriction is highly effective in reducing the risk for atherosclerosis in humans .... ref name NBC11Health Elisa Zied, http www.msnbc.msn.com id 20746251 Some Try Calorie Restriction ... Long term calorie restriction is highly effective in reducing the risk for atherosclerosis in humans ... first Jon title The Calorie Restriction Experiment work The New York Times Magazine date 2009 ... first4 Samuel last5 Holloszy first5 John O. title Long term effects of calorie or protein restriction ... S. last5 Floel first5 A. title From the Cover Caloric restriction improves memory in elderly humans ... ref Health concerns Although studies show that calorie restriction can improve longevity and health ..., the long term effects of calorie restriction on humans are still unknown. ref name Spindler, 2010 cite journal last1 Spindler first1 Stephen R. title Biological Effects of Calorie Restriction Implications ... In addition to a number of benefits, short term studies of calorie restriction in humans have reported ... Antiaging, longevity and calorie restriction journal Current Opinion in Clinical Nutrition and Metabolic ... weight are not studies of calorie restriction as used in anti aging studies. Indeed, they are not in fact ... aging calorie restriction diet. ref name St. Jeor et al, 2001 cite journal last1 St. Jeor first1 S. T. last2 ... more details
Unreferenced date December 2009 Other uses Restriction disambiguation In mathematics , the notion of restriction of a function is defined as follows If f E F is a function mathematics function from E to F , and A is a subset of E , then the restriction of f to A is the partial function math f A A to F math having the graph math G f A x,y in G f mid x in A math . In rough words, it is the same function , but only defined on math A cap mathrm dom , f math . More generally, the restriction or domain restriction or left restriction A R of a binary relation R between E and F may be defined as a relation having domain A , codomain F and graph G A R x , y G R x A . Similarly, one can define a right restriction or range restriction R B . Indeed, one could define a restriction to a subset of E x F , and the same applies to n ary Relation mathematics relations . These cases do not fit into the scheme of sheaf mathematics sheaves . The domain anti restriction of a function or binary relation R with domain E and codomain F by a set A may be defined as E A R it removes all elements of A from the domain E . It is sometimes denoted A R . The range anti restriction R B is defined by R F B . Examples The restriction of the non injective function math f mathbb R to mathbb R x mapsto x 2 math to math mathbb R 0, infty math is the injection math f mathbb R to mathbb R x mapsto x 2 math . The canonical injection of a set A into a superset E of A . See also Function mathematics Restrictions and extensions Binary relation Restriction DEFAULTSORT Restriction Mathematics Category Sheaf theory ca Restricci matem tiques cs Restrikce zobrazen de Einschr nkung Mathematik it Restrizione di una funzione ru fi Rajoittuma ... more details
Refimprove date May 2009 A restriction digest is a procedure used in molecular biology to prepare Deoxyribonucleic acid DNA for analysis or other processing. It is sometimes termed DNA fragmentation this term is used for other procedures as well . Hartl and Jones describe it this way blockquote This enzymatic ... bacteria. These enzymes are called restriction endonucleases or restriction enzymes, and they are able ... , and chromatography . It is used in genetic fingerprinting , and restriction fragment length polymorphism RFLP analysis . A given restriction enzyme cuts DNA segments within a specific DNA sequence nucleotide sequence , at what is called a restriction site . These recognition sequence .... Restriction enzymes specific to hundreds of distinct sequences have been identified and synthesized for sale to laboratories, and as a result, several potential restriction sites appear in almost ... dozens of restriction enzyme recognition sequences within a very short segment of DNA. This allows ... vectors , which can be efficiently cloned by insertion into replicating bacterial cells. After restriction ... amino acid amino acids . Possible Uses Restriction digests are necessary for performing any of the following analytical techniques RFLP Restriction Fragment Length Polymorphism AFLP Amplified Fragment Length Polymorphism STRP Short Tandem Repeat Polymorphism Various restriction enzymes There are numerous types of restriction enzymes, each of which will cut DNA differently. See article on restriction enzyme Examples Restriction enzymes for examples . There are some that cut a three base pair ... components that aid the enzyme in cutting as efficiently as possible. Different restriction enzymes ... DNA sequencing Fermentas FERMENTAS Genetic fingerprinting PCR Restriction fragment length polymorphism ... Biolabs Producer of restriction enzymes. This site contains highly detailed information on numerous ... REBASE DEFAULTSORT Restriction Digest Category Molecular biology ... more details
The restriction point is a G1 phase G sub 1 sub phase cell cycle checkpoint checkpoint in the cell cycle of animal cell biology cell s. Prior to the restriction point, a cell exits the cell cycle if specific mitogenic and growth signals are absent. Cells that progress past the restriction point are committed to enter S phase , where DNA synthesis and DNA replication replication occurs. Yeast cells contain a similar checkpoint, termed the START point . Discovery of the restriction point In 1974, Arthur Pardee demonstrated that a single restriction point exists for a variety of proliferative and antiproliferative inputs ref Pardee A. Proc. Nat. Acad. Sci. USA Vol. 71, No. 4, pp. 1286 1290, April 1974 ref . These inputs are integrated in a single switch, termed the restriction point, that regulates the reentry of a cell into a new round of the cell cycle. Lack of growth factor s causes some cells to arrest prior to the restriction point. In 1985, Zetterberg and Larsson discovered that, in all stages of the cell cycle, serum deprivation results in inhibition of protein synthesis except in postmitotic cells in the first 3 4 hours of G1 ref Zetterberg, A and Larsson, O, PNAS 1985, 82 5365 5369. ref . If external conditions are not appropriate for S phase, then the cell may enter G0 phase G sub 0 sub phase , a quiescence quiescent stage. Pardee also demonstrated that the restriction point is defective in cancer cell lines, providing physiological relevance for this molecular switch. Mutation s in factors contributing to cell cycle arrest at the restriction point are thought to be the main contributors to cancer ref Cancer Cell Cycles, Charles J. Sherr, Science, 6 December 1996 ref Genes involved in the G1 S transition The transition from G1 phase to S phase involves the phosphorylation and inactivation of the retinoblastoma protein Rb , which leads to activation of a positive ... feedback is important for driving progression from G1 to S its involvement in the restriction point ... more details
A restriction map is a map of known restriction sites within a sequence of DNA . Restriction mapping requires the use of restriction enzyme s. In molecular biology , restriction maps are used as a reference to engineer plasmids or other relatively short pieces of DNA, and sometimes for longer genomic DNA. There are other ways of mapping features on DNA for longer length DNA molecules, such as mapping by Transduction genetics transduction Bitner, Kuempel 1981 . One approach in constructing a restriction map of a DNA molecule is to sequence the whole molecule and to run the sequence through a computer program that will find the recognition sites that are present for every restriction enzyme known. Before sequencing was automated, it would have been prohibitively expensive to sequence an entire DNA strand. Even today sequencing is overkill for many applications. To find the relative positions of restriction sites on a plasmid a technique involving single and double restriction digests is used. Based on the sizes of the resultant DNA fragments the positions of the sites can be inferred. Restriction mapping is very useful technique when used for determining the orientation of an insert in a cloning vector, by mapping the position of an off center restriction site in the insert Dale, Von ... produce fragments that add up one may infer the position of the REN restriction endonuclease sites ... by all three digests. See also restriction enzymes for more detail about the enzymes exploited in this technique. Example For example the most common application of restriction mapping is presented Determining the orientation of a cloned insert. This method requires that restriction maps of the cloning vector and the insert are already available. If you know of a restriction site placed towards ... as opposed to B to A which would yield fragments of 7 kb and 1kb. resultant map Image Restriction ... software used among other things to predict restriction sites on a DNA vector RFLP method ... more details
Unreferenced stub auto yes date December 2009 Export restrictions , or a restriction on exportation , are limitations on the quantity of good economics goods export ed to a specific country or countries by a government. An export restriction may be imposed To prevent a shortage of goods in the domestic market because it is more profitable to export To manage the effect on the domestic market of the importing country, which may otherwise impose Dumping pricing policy antidumping duties on the imported goods As part of foreign policy , for example as a component of trade sanction s To limit or restrict arms or dual use items that may be used in proliferation, terrorism, or nuclear, chemical, or biological warfare. To limit or restrict trade to embargoed nations. Export restrictions from USA are specified by Bureau of Industry and Security DEFAULTSORT Export Restriction Category Commerce Economy stub de Exportbeschr nkung ru ... more details
Encyclopedia
top
