In chemistry , a racemicmixture , or racemate IPAc en icon r e s i m e t , is one that has equal .... The first known racemicmixture was racemic acid , which Louis Pasteur found to be a mixture of the two enantiomeric isomer s of tartaric acid . Nomenclature A racemicmixture is denoted by the prefix or dl for sugars the prefix smallcaps dl may be used , indicating an equal 1 1 mixture of dextro ... H. W. B. Roozeboom had distinguished by 1899 Conglomerate sometimes racemicmixture or racemic conglomerate A mechanical mixture of enantiomerically pure crystals of one enantiomer and its opposite ... enantiomer or as a racemicmixture. Examples include thalidomide , ibuprofen , and salbutamol . Adderall is a mixture of several different amphetamine enantiomers. A single amphetamine dose combines ... enantiomer. The melting point of the racemic conglomerate is always lower than that of the pure ... point. Racemic compound sometimes true racemate Molecules have a greater affinity for the opposite ... of one enantiomer to the racemic compound decreases the melting point. But the pure enantiomer can have a higher or lower melting point than the compound. Pseudoracemate sometimes racemic solid solution In contrast to the racemic compound or conglomerate, there is no big difference in affinity between ... is a mixture of two similar but distinct compounds, one of which is left handed and the other right ... a racemic crystalline phase. One of the first such racemates studied, by Pasteur in 1853, forms from a 1 2 mixture of the bis ammonium salt of tartaric acid and the bis ammonium salt of malic acid ... bitartrate, whereas the outer parts are a quasiracemic mixture of ammonium bitartrate and ammonium ... to be a racemic primordial earth. The reagents of, and the reactions that produce, racemic mixtures ... . Racemic pharmaceuticals see also Enantiopure drug Some Small molecule drug molecules ... that racemic crystals tend to be denser than their Chirality chemistry chiral counterparts. ref ... more details
Other uses Mix disambiguation In chemistry , a mixture is a material system made up by two or more different substances which are mixed but are not combined chemically. Mixture refers to the physical combination of two or more substances the identities of which are retained and are mixed in the form ... to its constituents, the physical properties of a mixture, such as its melting point , may differ ... of mixture which usually pose considerable difficulties regarding the separation process es required ... can be either homogeneous chemistry homogeneous or heterogeneous . A homogeneous mixture is a type of mixture in which the composition is uniform. A heterogeneous mixture is a type of mixture in which ... mixture of the gaseous substances nitrogen, oxygen, and smaller amounts of other substances. Salt ... mixture in which there is both a solution solute and solvent present is also a solution.The following are some examples of a heterogeneous mixture Sand in water Smoke Chicken soup Protoplasm Silt in water ... chip cookie Muddy water sugar and cornstarch Mixture of different types of cereals The following ... Coarse dispersion Mixture homogeneity Homogeneous Visually homogeneous but microscopically heterogeneous ... Coarse dispersion Gas Gas Gas mixture air oxygen and other gases in nitrogen None None Liquid Gas ... glass Gravel , granite Physics and chemistry A heterogeneous mixture is a mixture of two or more ... scale, any mixture can be said to be homogeneous, if you ll allow the entire article to count as a sample of it. On a fine enough scale, any mixture can be said to be heterogeneous, because a sample could be as small as a single molecule. In practical terms, if the property of interest of the mixture is the same regardless of which sample of it is taken for the examination used, the mixture is homogeneous ... is to be drawn. Also, milk is a mixture References reflist GoldBookRef title mixture file M03949 ... nl Mengsel ja pl Mieszanina pt Mistura qu Chaqrusqa ru simple Mixture sk Zmes sl ... more details
Infobox Album See Wikipedia WikiProject Albums Name Mixture? Type Studio album Artist Relative Silence Cover Genre Progressive metal Length Recorded December 2001 January 2002 Released February 2002 Label Bunker Producer Pablo Garc a Fern ndez Pablo Garc a Reviews Last album This album Next album Mixture? is the first studio album by the Progressive metal band Relative Silence , which was released in 2002. Track listing Intro Siento Colapso Emocional D as Extra os Personnel Javier Fern ndez vocals Pablo Garc a Fern ndez Pablo Garc a guitars Helena Pinto keyboard Aitor Porres bass Daniel Cabal drums Guests V ctor Garc a additional vocals On D as Extra os Category 2002 albums Category Relative Silence albums ... more details
orphan date March 2009 Racemic crystallography is a recently developed technique of structural biology , which appears capable of producing certain protein crystals. ref Protein Racemate Yields Crystals , Amanda Yarnell, Chemical & Engineering News , 87 , 4, p. 8 ref Development The process was first proposed by UCLA structural biologist Todd Yeates in 1995, who suggested that a racemicmixture of proteins would crystallize more readily than each component alone. The process of mixing proteins made of D amino acids with the more readily available L amino acid containing proteins appears straightforward, but it took a decade to overcome the obstacle that D amino acids cannot be isolated in the laboratory. The obstacle was gradually overcome by laboratories which developed methods of chemically synthesizing D amino proteins. By 2008 the United States National Institute of General Medical Sciences was able to synthesize about 300 such amino acids. ref C&EN p. 8 ref In 2009 the first announcement of successful results in the effort to obtain protein crystals by the racemic method was made by University of Chicago researchers. ref J.Am.Chem.Soc. , DOI, 10.1021 ja8077973 ref They produced crystals of the protein BmBKTx1, which is found in nature in the venom of an Asian scorpion . This protein has successfully resisted efforts at crystallization by other methods. References reflist Category Crystallography Category Neutron related techniques Category Synchrotron related techniques biology stub ... more details
Racemic acid is an old name for an optically inactive or racemic form of tartaric acid . It is an equal mixture of two mirror image isomers enantiomers , optically active in opposing directions. Its sodium ammonium salt is unusual among racemic mixtures in that during crystallization it can separate out into two kinds of crystals, each composed of one isomer, and whose macroscopic shapes are mirror images of each other. Thus, Louis Pasteur was able to separate the two enantiomers by picking apart the crystals. ref cite journal url http 192.129.24.144 licensed materials 00897 papers 0003006 36kau897.pdf title Pasteur s Resolution of Racemic Acid A Sesquicentennial Retrospect and a New Translation author George B. Kauffman & Robin Myers journal The Chemical Educator volume 3 year 1998 doi 10.1007 s00897980257a ref In a modern time re enactment of the Pasteur experiment, ref cite journal journal Mendeleev Communications Electronic Version issue 3 year 2003 title The reexamination of Pasteur s experiment in Japan author Yoshito Tobe url http web.archive.org web 20050831131702 http mendcomm.org pages goodies mc0303 pdf mc1803.pdf Free access version with experimental details doi 10.1070 MC2003v013n03ABEH001803 ref ref cite journal journal Kagaku no Ryoiki year 1979 volume 33 pages 951 962 author Masao Nakazaki title Morphology of sodium ammonium tartrate Pasteur s spontaneous resolution and its reexamination, ref it was established that the preparation of crystals was not very reproducible. The crystals deformed, but they were large enough to inspect with the naked eye microscope not required . See also Tartaric acid References reflist Category Carboxylic acids Category Stereochemistry fa ... more details
Racemic epinephrine is a racemicmixture of epinephrine and is a sympathomimetic bronchodilator that is delivered by aerosol. ref name pmid17626698 cite journal author Wiebe K, Rowe BH title Nebulized racemic epinephrine used in the treatment of severe asthmatic exacerbation a case report and literature review. journal CJEM year 2007 volume 9 issue 4 pages 304 8 pmid 17626698 doi pmc url http www.ncbi.nlm.nih.gov entrez eutils elink.fcgi?dbfrom pubmed&tool sumsearch.org cite&retmode ref&cmd prlinks&id 17626698 ref Commonly used in croup laryngotracheobronchitis and when stridor is present after removal of an endotracheal tube extubation . ref name pmid17626698 ref name pmid11869578 cite journal author Davies MW, Davis PG title Nebulized racemic epinephrine for extubation of newborn infants. journal Cochrane Database Syst Rev year 2002 volume issue 1 pages CD000506 pmid 11869578 doi 10.1002 14651858.CD000506 pmc url http www.ncbi.nlm.nih.gov entrez eutils elink.fcgi?dbfrom pubmed&tool sumsearch.org cite&retmode ref&cmd prlinks&id 11869578 ref Racemic epinephrine prepared for aerosolization is equivalent to a 1 100 dose of epinephrine. Overview The term racemic epinephrine refers to a mixture of the dextro rotatory and levo rotatory isomers in equal parts. The l isomer is present in the adrenal ... Medicine volume 19 issue 4 pages 332 40 year 1956 month April pmid 13322728 doi url ref . The racemic ... 1951 month October pmid 14907450 doi url ref . Studies have further demonstrated the racemic form ... NEJM197802162980703 url ref . Indications Racemic epinephrine may be indicated when there is stridor ... epinephrine both Racemic epinephrine racemic and Epinephrine levo 1 epinephrine has been shown ... . Contraindications Racemic epinephrine should not be used in cases of epiglottitis or hypersensitivity ..., nausea, anxiety, heart palpitations and headache ref name pmid17626698 . Mechanism of action Racemic ...?dbfrom pubmed&tool sumsearch.org cite&retmode ref&cmd prlinks&id 15203565 ref . Dosage Racemic ... more details
Wiktionarypar MixtureMixture may mean In chemistry mixture , a combination of two or more chemicals, in which the chemicals retain their identity. In music mixture music , a special kind of pipe organ stop which has several pipes to each note In probability and statistics mixture probability , outlines two meanings mixture density , a probability density defined as a combination of other densities mixture model , used to formulate the problem of identifying from which source population an obserrvation has arisen. See also Mix disambiguation disambig ... more details
Infobox Album See Wikipedia WikiProject Albums Name B z The Mixture Type Remix Album Artist B z Cover B z TM.jpg Released February 23, 2000 Recorded Genre Hard rock Length 66 09 Label Being Inc. Berg Label Producer Tak Matsumoto Reviews Last album B z The Best Treasure br 1998 This album B z The Mixture br 2000 Next album The Ballads Love & B z br 2002 B z The Mixture is a compilation album of remastered hits by Japanese rock duo B z . The album also reached 1st at Oricon , with almost 1,5 million copies sold. ref cite web url http www.oricon.co.jp news ranking 21023 accessdate October 6 2007 title Oricon ref Track listing nihongo Dakara Sono Te Wo Hanashite Mixture Style Mixture style You&I Mixture mix Oh Girl Mixture style Never Let You Go Mixture style Joy Mixture mix Ima de wa...Ima nara...Ima mo... Mixture style ... ... ... Mixture style Kodoku No Runaway Mixture Style Runaway Mixture style Move Tokyo Mixture Mix Mixture mix Hole In My Heart Mixture Mix Kara Kara Mixture Mix Fushidara100 Biribiri Mixture Mix Mixture mix Hi The Wild Wind Anata Nara Kamawanai References references http www.oricon.co.jp news ranking 21023 B z performance at Oricon External links http bz vermillion.com english top B z official site B z Category B z albums Category 2000 remix albums 2000s hard rock album stub ja B z The Mixture pt B z The Mixture ... more details
otheruses2 mixture In probability theory and statistics , a mixture is a combination of two or more probability distributions. The concept arises in two contexts A mixture defining a new probability distribution from some existing ones, as in a mixture density . Here the main problem is to derive the theoretical properties of the new distribution. A mixture used as a statistical model such as is often used for statistical classification .The model may represent the population from which observations arise as a mixture density , but the problem is that of a mixture model , in which a data classification hypothesis represents an overall distribution as a mixture of separate distributions representing separate populations and the task is to infer from which population each observation arises. Category Statistical models Category Statistical classification Category Statistical terminology statistics stub ... more details
For the band Dolly Mixture band Unreferenced date June 2007 Image Dolly mixture.JPG thumb A plate of dolly mixture Dolly mixture is a United Kingdom British confectionery confection , consisting of a variety of multi coloured fondant shapes, such as cube s and cylinders, with subtle flavourings. The mixtures also include hard coated fondants in round edged cube shapes, and sugar coated jellies. They are sold together in a mixture, in a medium sized packet. The product is produced by various companies in different countries the most popular brands are those produced by Cadbury Trebor Bassett Trebor Bassett now a part of the Cadbury Schweppes Cadbury s consortium and Haribo . The name Dolly refers to the small size of the sweets. Citation needed date September 2009 The The Goon Show Goon Show character, Bluebottle character Bluebottle , was frequently rewarded, or able to be bribed, with a quantity of dolly mixture. See also Liquorice allsorts DEFAULTSORT Dolly Mixture Category Confectionery Category Scottish cuisine candy stub ... more details
The Trapp mixture is a specific mixture of organic solvent s for chemical reaction s taking place at very low temperature s. The mixture THF diethyl ether pentane 4 4 1 is a liquid down to 110 C and the same 4 1 1 mixture is liquid down to 120 C . Note that pure THF melts at 108.4 C . References cite journal author K brich, G. Trapp, H. journal Chem. Ber. year 1966 volume 99 issue 2 pages 680 doi 10.1002 cber.19660990243 title Darstellung und thermische Stabilit t von 1 Chlor 2.2 diaryl vinyllithium Verbindungen chem stub Category Solvents ar ... more details
A frigorific mixture is a mixture of two or more chemicals that reaches an equilibrium temperature that is independent of the temperature of any of its component chemicals before they are mixed. The temperature is also relatively independent of the quantities of mixtures as long as significant amounts of each original chemical are present in its pure form. Liquid water and ice, for example form a frigorific mixture at defining 32 degrees Fahrenheit or 0 degrees Celsius. A mixture of ammonium chloride and ice form a frigorific mixture at about 17.8 degrees Celsius or 0 degrees Fahrenheit. Other examples of frigorific mixtures include ref http books.google.com books?id wwY6DT2Sc cC&pg RA6 PA546&dq frigorific artillery PRA4 PA462,M1 The Ordnance Manual for the Use of the Officers of the United States Army, Third Edition, 1862, page 462 ref Image Frigorific mixtures.JPG Uses The most common use of a frigorific mixture is to melt ice. When ammonium chloride salt is placed on ice when the ambient temperature is greater than &minus 17.8 ° C 0 F , then the salt melts some of the ice and the temperature drops to &minus 17.8. Since the mixture is colder than the ambient, heat is absorbed and the temperature rises. This causes the salt to melt more of the ice to drive the temperature down again. The process continues until all of the salt is dissolved in the melted ice. If there is enough salt present, then all of the ice will be melted. Frigorific mixtures are commonly used in laboratories as a convenient way to generate reference temperatures for calibrating thermometer s. They are also useful for creating cold temperatures when mechanical refrigeration is not available. They can be used to tightly fit two parts of machined metal, for example. One part is soaked in a frigorific mixture, causing it to cool and contract. The cooled part is then placed into the second part, which has not been cooled. As the first part warms, it expands to fit tightly within the second part ... more details
Bekhterev s Mixture lang ru , MixturaBechtereva is a medicine with a sedative effect, affecting central nervous system . The mixture is proposed by famous Russian neurologist Vladimir Bekhterev and subsequently named after him. One of the oldest and most popular medicines of the type, it is used to treat light forms of heart failure , panic disorder , and dystonia . References http medicinelib.ru lecarstva B lecarstva6616.html MixturaBechtereva at medicinelib.ru ru icon Category Sedatives Category Russian inventions ru ... more details
Merge to Mixture model date September 2010 See also Mixture model In probability and statistics , a mixture ... vector s, each having the same dimension, in which case the mixture distribution is a multivariate ... referred to as a mixture density . The cumulative distribution function and the probability ... distributions that are combined to form the mixture distribution are called the mixture components , and the probabilities or weights associated with each component are called the mixture weights . The number of components in mixture distribution is often restricted to being finite, although in some ... of a set of components i.e. a mixture distribution and a random variable whose value is the sum ..., a mixture density created as a mixture of two normal distributions with different means will have ... different from a normal distribution. Mixture distributions arise in many contexts in the literature ... statistical model s involving mixture distributions is discussed under the title of mixture model s, while the present article concentrates on simple probabilistic and statistical properties of mixture ... mixtures Image Gaussian mixture example.png thumb Density of a mixture of three normal distributions ... 1, the mixture distribution can be represented by writing either the density, f , or the distribution ... i x , math math f x sum i 1 n , w i , p i x . math This type of mixture, being a finite sum, is called a finite mixture, and in applications, an unqualified reference to a mixture density usually means a finite mixture. The case of a countable set of components is covered formally by allowing math n ... of such distributions has a formal similarity to that of mixture distributions, with either infinite ... or infinite mixture if the density w is allowed to be a generalised function representing the derivative ... The mixture components are often not arbitrary probability distributions, but instead are members ... and integrating to 1 , and thus mixture densities are themselves probability density functions ... more details
Image BurgundyMixtureStructure.jpg thumb 300px Chemical structure of Burgundy Mixture Burgundy mixture , named after the French district where it was first used to treat grapes and vines ref name Borkov cite journal author Borkov, G. Gabbay, J. journal Current Medicinal Chemistry year 2005 volume 12 page 2163 url http www.bentham.org cmc contabs cmc12 18.htm title Copper as a Biocidal Tool issue 18 ref , is a mixture of Copper II sulfate copper sulfate and sodium carbonate . This mixture, which can have an overall copper concentration within the range of 1 through 20 ref name Richardson cite book author Richardson, H. W. title Handbook of Copper Compounds and Applications publisher CRC Press year 1997 pages 79,120 ref , is used as a fungicidal spray for trees and small fruits. ref name Roberts Roberts, J. W. Botanical Review. 1936, 2, 586. ref History Similar to the Bordeaux mixture Bordeaux Mixture , one of the earliest fungicides in use, Burgundy Mixture, also known as Sal soda Bordeaux, is used as a fungus preventative applicant on plants before fungi have appeared ref name Chester cite journal author Chester, F. D. journal Journal of Mycology year 1980 volume 6 issue 1 title The copper ... ref . Bordeaux Mixture contains copper sulfate , CuSO sub 4 sub , and hydrated lime, Ca OH sub 2 sub , while Burgundy Mixture contains copper sulfate, CuSO sub 4 sub , and sodium carbonate, Na sub 2 sub CO sub 3 sub . ref name Chester First used around 1885 ref name Richardson , Burgundy Mixture ... Burgundy Mixture is made by combining dissolved copper sulfate and dissolved sodium carbonate. Dissolved ... out of solution, and the closer the copper sulfate to sodium carbonate mixture is to 1 1 ratios, the faster ... Mixture, as the mixture must be mixed and used shortly before intended utilization. ref name Butler Butler, O. Bull. 1933, 56, 3. ref Uses and mode of action Burgundy Mixture is used as a preemptive ... Burgundy Mixture Category Copper compounds Category Fungicides nl Bourgondische pap tr Burgonya ... more details
Bordeaux mixture is a mixture of copper II sulfate CuSO sub 4 sub and slaked lime used as a fungicide in vineyards . It is used mainly to control garden, vineyard, nursery and farm infestations of fungus fungi , primarily downy mildew , which can result from infections of Plasmopara viticola . It was invented ... science leach out and pollute streams. File Bourdeaux mixture.jpg thumb alt Bordeaux mixture on grapevines near Montevibiano, Italy. Bordeaux mixture on grapes Main uses In addition to its use to control fungal infection on grape vines, the mixture is also widely used to control potato blight , Taphrina ... out those vines had been sprayed with a mixture of CuSO sub 4 sub and lime to deter passersby from ... in 1885, and recommended the mixture to combat downy mildew. In France, the use of Bordeaux mixture has also been known as the Millardet David treatment. Mode of action Bordeaux mixture achieves its effect by means of the copper ion s Cu sup 2 sup of the mixture. These ions affect enzyme s in the fungal spore s in such a way as to prevent germination . This means Bordeaux mixture must be used pre emptively, before the fungal disease has struck. Preparation Bordeaux mixture can be prepared ... method of describing the mixture s composition is to give the weight of CuSO sub 4 sub , the weight ... 4 sub to the weight of water employed determines the concentration of the mixture. Thus a 1 Bordeaux mixture, which is typical, would have the formula 1 1 100, with the first 1 representing 1 ... Bordeaux mixture would be 0.25 . The quantity of lime used can be lower than that of the CuSO sub ... than 2 1 is seldom used, which corresponds to a 1 0.5 100 mixture. Risks Bordeaux mixture has been ... around 1922. The mixture was nicknamed perico , or parakeet , because it would turn workers completely ... http www.ipm.ucdavis.edu PMG PESTNOTES pn7481.html Bordeaux Mixture at Agriculture and Natural Resources ... Bordeaux Mixture Prevents fungus on fruit at Gardens Alive Category Fungicides ca Brou bordel s ... more details
infobox Book See Wikipedia WikiProject Novels or Wikipedia WikiProject Books name A Mixture of Frailties title orig translator image Image AMixtureofFrailties.png thumb A Canadian paperback edition of A Mixture of Frailties image caption author Robertson Davies illustrator cover artist country United States language English language English series The Salterton Trilogy genre Novel publisher Scribner Press Scribner pub date 1958 english pub date media type Print Hardcover pages 379 pp isbn N A preceded by Leaven of Malice followed by A Mixture of Frailties , published by Macmillan in 1958 in literature 1958 , is the third novel in The Salterton Trilogy by Canada Canadian novelist Robertson Davies . The other two novels are Tempest Tost 1951 in literature 1951 and Leaven of Malice 1954 in literature 1954 . The series was also published in one volume as The Salterton Trilogy in 1986 in literature 1986 . The trilogy revolves around the residents of the imaginary town of Salterton, Ontario . The central character, Monica Gall, is a working class girl with a beautiful singing voice. She unexpectedly receives a large sum of money enabling her to study music in Europe. The novel traces the struggles, and eventual success, in her personal and artistic growth. External links iblist title id 22357 title A Mixture of Frailties Salterton Trilogy DEFAULTSORT Mixture of Frailties, A Category Novels by Robertson Davies Category 1958 novels Category Novels set in Ontario 1950s novel stub ... more details
Armstrong s mixture is a highly sensitive explosive material primary explosive . Its primary ingredients are red phosphorus and strong oxidizer, such as potassium chlorate and potassium perchlorate . Sulfur and calcium carbonate might be present in small amounts, though other additives are also used. Commercially, Armstrong s mixture is used in extremely small quantities on the paper caps in toy cap gun s. ref name calvert cite web url http www.du.edu jcalvert phys bang.htm title Flash Bang Whiz An introduction to propellants, explosives, pyrotechnics and fireworks author J. B. Calvert accessdate 2006 11 11 ref It has also been considered a suitable mixture for the primer used in gun s after boron carbide has been added. ref US patent reference number 3973502 y 1976 m 08 d 10 inventor Charles R Olsen title Tube primer ref Safety considerations Because of it sensitivity to shock, friction and flame, Armstrong s mixture is an extremely dangerous explosive. Only about 10 mg of it is used per item of consumer fireworks. Depending on composition, conditions and quantity, Armstrong s mixture can explode violently in an unenclosed space, i.e. a bump of the mixture with a fuse in it would explode as it would be in a sealed container. ref cite web url http www.freeinfosociety.com pdfs science impactfirecrackers.pdf title Impact Firecrackers author John Donner accessdate 2006 11 11 format PDF ref References reflist Category Pyrotechnic compositions Category Explosives da Armstrongs blanding de Armstrongsche Mischung he lt Armstrongo mi inys simple Armstrong s mixture ... more details
A Penning mixture Harv Weston 1968 p 334 , Harv Bylander 1979 p 65 , named after Frans Michel Penning , is a mixture of gases used in electric lighting or displaying fixtures. Although the popular phrase for the most common of these is a neon lamp , it s more efficient to have the glass tube filled not with pure neon , but with a Penning mixture, which is defined as a mixture of one inert gas with a minute amount of another gas, one that has lower ionization voltage than the main constituent or constituents . Explanation The other gas, called a quench gas, has to have lower ionization potential than the first excited state of the noble gas. The energy of the excited noble gas atoms then can ionization ionize the quench gas particles by energy transfer via collisions known as the Penning ionization Penning effect . A very common Penning mixture of about 98 99.5 of neon with 0.5 2 of argon is used in some neon lamps, especially those rated at 110 volts. The mixture is easier to ionize than either neon or argon alone, and lowers the striking voltage at which the tube becomes conductive and starts producing light. The optimal level of argon is about 0.25 , but some of it gets adsorbed onto the borosilicate glass used for the tubes, so higher concentrations are used to take the losses into account higher argon content is used in higher power tubes, as hotter glass adsorbs more argon. The argon changes the color of the neon light , making it slightly more yellowish. A Penning mixture of neon and argon is also used as a starter gas in sodium vapor lamp s, where it is responsible for the faint reddish glow before the sodium emission kicks in. The Penning mixture used in plasma display s is usually helium or neon with small percentage of xenon , at several hundred torr . Penning mixtures with the formulas of argon xenon, neon argon, argon acetylene , and xenon trimethylamine TMA are used as filler gases in gaseous ionization detector s. Other kinds of Penning mixture include ... more details
12 18 year 1973 ref File Powder mixtures.jpg Random mixture A random mixture can be obtained if two ... of mixture, i.e., the particles are not cohesive and do not cling to one another. The mixing time will determine the quality of the random mixture. However, if powders with particles of different size ... separation of the powders as, for example, lighter particles will be prone to travel to the top of the mixture whereas heavier particles are kept at the bottom. Ordered mixture The term ordered mixture was first introduced to describe a completely Homogeneous chemistry homogeneous mixture where the two ... 44 year 1975 doi 10.1016 0032 5910 75 80021 0 ref However, a completely homogeneous mixture is only achievable in theory and other denotations were introduced later such as adhesive mixture or interactive mixture. Interactive mixture If a free flowing powder is mixed with a cohesive powder an interactive mixture can be obtained. The cohesive particles adhere to the free flowing particles now called ... mixture may not contain free aggregates of the cohesive powder, which means that all small particles must be adhered to the larger ones. The difference from an ordered mixture is instead that all ... 77 85034 1 ref In practice a combination of a random mixture and an interactive mixture may be obtained ... 12084498 issue 1 ref are used. If an interactive mixture is to be formed, it is necessary that enough ... formation of a random mixture A and an interactive mixture B by dry mixing two powder materials. References ... more details
Mixture theory is used to model Phase matter multiphase systems using the principles of continuum mechanics eneralised to several interpenetrable continua. ref name Bowen1976 cite book author Bowen,R. M. editor Eringen, A. C. title Theory of Mixtures, Part I series Continuum Physics volume III year 1976 publisher Academic Press location New York, USA ref The basic assumption is that, at any instant of time, all phases are present at every material point, and momentum and mass balance equations are postulated. Like other models, mixture theory requires Constitutive equation constitutive relations to close the system of equations. References reflist Category Rheology Category Scientific modeling ... more details
A.C.E. mixture or ACE mixture is an old Anesthetic anaesthetic agent for general anaesthesia , which ... volume 3 issue 3 pages 235 244 pmid 1878238 url format ref It was a mixture of Ethanol alcohol ... gives the mixture its name. Its actions were said to be between that of chloroform and ether and it was used ... mixture of chloroform and ether in gynecological operations by means of a Clover s inhaler without ... . ref name death reference 1 cite journal title Deaths Under Chloroform And A.C.E. Mixture journal ... 143 id jstor 20225168 format ref Usage A.C.E. mixture was most commonly made up in the ratio 1 part ... with the choloroform in the A.C.E. mixture was believed to reduce this. ref name anesthesia history ... 10.1136 bmj.2.1185.529 ref Many anaesthetists favoured A.C.E. mixture and one author in 1887 in the British Medical Journal considers the A.C.E. mixture, at the time, the best anaesthetic for general ... on regaining consciousness after the anaesthetic, due to the alcohol in the mixture. ref name bmj ace mixture cite journal doi 10.1136 bmj.2.1402.1078 a title A. C. E. Mixture journal The British ... jstor 20213635 format ref Another downside of the mixture, as with most anaesthetics at the time, was its high flammability . Deaths have been known to occur from the mixture. ref name death reference .... A.C.E. Mixture journal The British Medical Journal date 1895 02 02 first last coauthors volume 1 issue 1779 pages 282 id jstor 20231460 format ref However, at the time, deaths from A.C.E. mixture were ... doi 10.1136 bmj.2.1447.681 ref Other preparations After widespread use of A.C.E. mixture, anaesthetists would try different mixtures for different patients and different procedures. C.E. Mixture omitted the alcohol and A.C. mixture omitted the ether. ref name old anaesthetics book One particular doctor ... An sthetic Mixture journal The British Medical Journal date 1888 01 07 first William J. last Stephens ... old anaesthetics book Richardson s mixture 2 parts alcohol, 2 chloroform and 3 ether Vienna mixture ... more details
Merge from Mixture density date September 2010 See also Mixture distribution In statistics , a mixture ... an individual observation belongs. Formally a mixture model corresponds to the mixture distribution ... problems associated with mixture distributions relate to deriving the properties of the overall population from those of the sub populations, mixture models are used to make statistical inference s about ... sub population identity information. Some ways of implementing mixture models involve steps that attribute ... clustering procedures. However not all inference procedures involve such steps. Mixture models ... to sum to a constant value 1, 100 , etc. . Structure of a mixture model General mixture model A typical finite dimensional mixture model is a hierarchical Bayes model hierarchical model consisting ... according to a mixture of K components, with each component belonging to the same parametric ... random latent variable s specifying the identity of the mixture component of each observation, each distributed according to a K dimensional categorical distribution A set of K mixture weights ..., each specifying the parameter of the corresponding mixture component. In many cases, each parameter is actually a set of parameters. For example, observations distributed according to a mixture ... distributed according to a mixture of V dimensional categorical distribution s e.g., when each ... summing to 1. In addition, in a Bayesian inference Bayesian setting , the mixture weights and parameters ... mixture model can be described as follows math begin array lcl K & & text number of mixture components ... associated with component i phi i 1 dots K & & text mixture weight, i.e., prior probability of a particular ... for component parameters beta & & text shared hyperparameter for mixture weights H theta alpha ... categorical for discrete observations . Other common possibilities for the distribution of the mixture ... recognition example below Specific examples Gaussian mixture model File nonbayesian gaussian mixture.svg ... more details
factors so called near azeotropic mixtures . ref Jones J.A., Near Azeotropic Mixture Substitute for Dichlorodifluoromethane ... contain different functional groups e. g. chloroform and methanol . A mixture can be both .... A good example is the mixture of ethanol and water which is azeotropic above approximately convert 305 K C F and convert 12 kPa psi . Below that temperature and pressure the mixture is zeotropic ... more details
Sports Mixture is a confectionery product manufactured by Maynard s in the UK, formerly by the Lion Confectionery Company. The Lion brand has since been adopted by Tangerine Confectionery Ltd have who manufacture Sports mixture in their original version. Maynard and Lion are both owned by Cadbury UK, formerly Cadbury Trebor Bassett. It consists of fruit flavoured hard gums in the shape of sports equipment such as sailing boats, tennis raquets, rugby balls, cricket stumps, cricket bats, footballs and so on. The gums come in five different colours red, orange, black, yellow and green. The product used to contain liquorice flavoured pieces, but this has now replaced by blackcurrant. Also the colours are artificial. The Lion brand still manufactures the original flavours, including the liquorice flavoured black one. Thus making Lions version the favoured amongst the connoisseurs of Sports Mixtures. Many reviewers have also noted that the current product does not have the same consistency as the original product and that the cult favourite black one has changed flavour. http www.reviewcentre.com reviews89776.html Category British confectionery confection stub ... more details
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