Refimprove date May 2010 Image Hue alpha.png thumb This image s alpha channel falls off to zero at its base. A chequered backdrop is often used to signal transparency. In computer graphics , alphacompositing ... of 1 means that the pixel is opaque because the geometry completely overlapped the pixel. If an alpha channel is used in an image, it is common to also multiply the color by the alpha value, to save on additional multiplications during compositing. This is usually referred to as premultiplied alpha ... is the alphacompositing equivalent of Clipping computer graphics clipping . As an example ... operator Porter and Duff gave a geometric interpretation of the alphacompositing formula ... software is used to combine images, and makes extensive use of alphacompositing techniques ... in SVG 1.2 in 30 minutes DEFAULTSORT AlphaCompositing Category Computer graphics algorithms ... multiple 2D images into a single, final image in a process called compositing. For example, compositing ... of an alpha channel was introduced by Alvy Ray Smith in the late 1970s, and fully developed ... Thomas coauthors Tom Duff year 1984 title Compositing Digital Images journal Computer Graphics ... for each pixel, additional data is stored in the alpha channel with a value between 0 and 1. A value ... values are the first three values, 0, 0.5, 0 and the alpha value is the fourth, 0.5. If the color were fully green, its RGB would be 0, 1, 0 . Since this pixel is using a premultiplied alpha, all of the RGB values in the ordered triplet 0, 1, 0 are multiplied by 0.5 and then the alpha is added to the end to yield 0, 0.5, 0, 0.5 . Premultiplied alpha also has some advantages over normal alpha blending because premultiplied alpha blending is Associativity associative and linear interpolation gives better results. With the existence of an alpha channel, it is possible to express compositing image operations, using a compositing algebra . For example, given two image elements A and B, the most ... more details
. Elements crossing behind or before one another would pose additional problems. See also AlphacompositingCompositing window manager Digital compositing Primatte chromakey technology References Reflist ...About visual effects the process of combining several democratic motions compositing democracy the technique of compositing typeset by hand typesetting compositing in graphic design and still photography photomontage Compositing is the combining of visual elements from separate sources into single images ... Live action shooting for compositing is variously called chroma key blue screen , green screen , chroma key , and other names. Today, most, though not all, compositing is achieved through digital image manipulation. Pre digital compositing techniques, however, go back as far as the trick films of Georges M li s in the late 19th century and some are still in use. Basic procedure All compositing involves ... another image. In the digital method of compositing, software commands designate a narrowly defined .... For example, a TV weather person is recorded in front of a plain blue or green screen, while compositing ... screen display. In other cases, presenters may be completely within compositing backgrounds that are replaced ... size can be created digitally because compositing software can take the blue or green color ... quality video conversions called digital intermediate s are created to enable compositing and the other operations of computerized Post production post production . Digital compositing is a form of matting, one of four basic compositing methods. The others are physical compositing, multiple exposure ... of Tomorrow Physical compositing In physical compositing the separate parts of the image are placed ... so that they give the appearance of a single image. The most common physical compositing elements ... of its complexity, rear projection has been largely replaced by digital compositing with, for example ... Traditional matting is the process of compositing two different film elements by printing them, one ... more details
into the digital realm of optical film compositing . Mathematics The basic operation used is known as alphacompositingAlpha blending alpha blending , where an opacity value, is used to control ... compositing can have effects such as halos around composited objects, because the influence of the alpha channel is non linear. It is possible for a compositing artist to compensate for the effects of compositing in non linear space. Performing alpha blending is an expensive operation if performed ...nocitations date December 2009 Digital compositing is the process of digitally assembling multiple images ... raster image where the pixel values are to be interpreted as alpha values is known as a matte ... to consider the algebraic properties of compositing operators used. Specifically, the associativity ... transparent image layers and denotes a compositing operator with the left layer on top of the right ... computing F. Without any special considerations, four full image blends would need to occur. For compositing ... additional compositing operations to integrate the new layer C F S C D . Note that this expression indicates compositing C with all of the layers below it in one step and then blending all of the layers ... rendering , the commutativity of a compositing operator can still be exploited to speed up .... Again, consider the image F A B C D . Each compositing operation in this expression depends on the next .... In general, we can build a tree of pair wise compositing operations with a height that is logarithmic in the number of layers. Software The most historically significant nonlinear compositing system ... to the limitations of processing speed and memory, compositing artists did not usually have the luxury of having the system make intermediate conversions to linear space for the compositing steps. Over time, the limitations have become much less significant, and now most compositing is done in a linear color space, even in cases where the source imagery is in a logarithmic color space. Compositing ... more details
Unreferenced date December 2009 In deliberative procedure , compositing is the process of combining several motion democracy motion s into one composite motion . The process of compositing motions may be desirable for two reasons. First, it can save the time of an Deliberative assembly assembly by avoiding presenting two or more similar motions. Second, it can increase the amount of support for the main provisions of two or more motions by producing a composite motion for which the supporters of each motion are likely to vote . The major disadvantages of compositing are also twofold. The motions composited may, in some respects, be dissimilar some of their supporters will not wish to vote for some provisions of the combined motion. Some provisions may have to be omitted from the composite motions to reduce its length or because the supporters of the original motions will not agree to them. The procedure of submitting motions to some meeting conferences includes one or more rounds of compulsory compositing in other cases, the compositing may be informal. DEFAULTSORT Compositing Democracy Category Democracy ... more details
notability date July 2010 unreferenced date July 2010 A software that is used in Post Production to composit scenes in a film and for adding Motion graphics Motion Graphics , special effects and color correction . Types of Composting Software Layer Based This software uses a Layer based interface for compositing and visual effects. Examples of Layer based Software are Adobe After Effects , Sony Vegas Pro , Apple Motion and the now discontinued Autodesk Combustion . Node Based This software uses a Node based interface for compositing and visual effects. Examples of Node based softwares are IFF software Autodesk Flame , Toxik Autodesk Toxik now sold as Autodesk Maya Maya Composite , Eyeon Fusion , Nuke software Foundry Nuke , Blender software and the now discontinued Apple Shake . Category Film ... more details
such as alphacompositing , Dissolve filmmaking fading , Image scaling scaling , Rotation mathematics ... Ubuntu . A compositing window manager is a type of window manager . A window manager is software that draws ... directly to display memory. A compositing window manager, however, combines the data buffer buffers ... date accessdate 2008 11 21 ref Compositing window managers may perform additional processing ... title Blueprint Compositing window management compiz beryl publisher Blueprints.launchpad.net date accessdate ... not Flicker screen flicker during updates. The most commonly used compositing window managers include ... corrupt date 2006 05 01 publisher Oracle accessdate 2010 12 17 ref With a compositing manager, when ... of the first systems with a compositing windowing system was the Commodore Amiga . Applications could ... support for alpha blending . ref cite web url http www.codeguru.com cpp frameworks advancedui windowingtechniquesandclasses article.php c3213 title Alpha Blending Transparent Windows publisher ... mainstream operating system to feature software based 3D compositing and effects, provided by its ... of compositing could be moved to dedicated graphics hardware. ref name arstechnica1 ref cite ... not to debut its 3D compositing window manager until the release of Windows Vista in January 2007 ... Computerhope.com date accessdate 2008 11 21 ref Compositing under the X Window System required ... date accessdate 2008 11 21 ref However, the first widely publicized compositing window manager ... 16 accessdate 2009 02 25 ref On 2005 01 26, Compiz was released, introducing fully accelerated 3D compositing ... 21 ref KDE s KWin also supports compositing. 2D compositing multiple image align center width 200 footer ..., the output from 2D compositing window managers has no depth, meaning that windows still exist in a plane ... reflection . 3D compositing Modern compositing window managers, including Desktop Window Manager, Quartz ... in hardware, so performance of OpenGL based compositing should continue to improve as hardware ... more details
Orphan date September 2009 Interactive Video Compositing or IVC is a technical interactive use of Pre rendering pre rendered videos and still graphics to create a visual coherence permitting to use the whole work in an interactive concept. Differences with video compositing is in the final product. An IVC is produced with the goal to purpose an interactive experiment with rich media. The most popular examples comes from video games using this before propagation of the real time 3D process, to mimic it. On internet, some websites generally in flash make use of this technique of visual rendering with some effects. Some game in IVC The 7th Guest Atlantis Myst Versailles Websites in IVC en http www.soundcircus.nl Soundcircus self promotion en http www.meintru3d.com Intel Meintru3d en http www.the podcats.tv The Podcats France T l vision fr http www.comcasttown.com ComCast Town self promotion External links en http www.freshpatents.com dt20090212ptan20090041422.php Concept development fr http blog.compositing.fr Weblog on video compositing logiciels et mat riels References en T. Porter and T. Duff, Compositing Digital Images , Proceedings of SIGGRAPH 84, 18 1984 . en http designwebart.20minutes blogs.fr archive 2009 09 16 flash video composited original website the podcats.html Interactive Video Compositing Art. Category Visual effects Category Mixed reality fr interactive video compositing ... more details
Multiple issues wikify August 2010 orphan August 2010 Deep image compositing is a recently emerged way of compositing and rendering digital images. In addition to the usual color and opacity channels a notion of depth is created. This allows multiple samples in the depth of the image to make up the final resulting color. This technique is producing high quality results and removes artefacts around edges that could not be dealt with otherwise. Deep data Deep data is an image that holds additional information about each pixel along the z axis like multi layered images where each layer has a depth associated with. But unlike Voxel s only at some arbitary specified points in depth. The data can be evaluated through different types of interpolation . Function based integrated The data is stored as a function of depth. This results in a function curve that can be used to look up the data at any arbitrary depth. Manipulating the data is harder. Sample based deintegrated Each sample is considered as an independent piece and can so be manipulated easily. To make sure the data is representing the right detail an additional expand value needs to be introduced. Generating deep data 3D renderer s produce the necessary data as a part of the rendering pipeline. Samples are gathered in depth and then combined. The deep data can be written out before this happens and is so nothing new to the process. Generating deep data from camera data needs a proper depth map. This is used in a couple of cases but still not accurate enough for detailed representation. For basic holdout task this can be sufficient though. Compositing deep data images Deep images can be Compositing composited like regular images. The depth component makes it easier to determine the layering order. This must traditionally be input by a user. Deep images have that information for themselves and need no user input. Edge artifacts are reduced as transparent pixels have more data to work with. History Deep Images have been ... more details
other uses pp semi indef Greek Alphabet letter alpha WikisourceEBD1897 A entry Alpha uppercase , lowercase ... Image phoenician aleph.png 20px Aleph . Letters that arose from Alpha include the Latin A and the Cyrillic letter A Cyrillic . Uses Greek In Ancient Greek , alpha was pronounced IPAblink a when short and IPAblink a when long. Where there is ambiguity, long and short alpha may be written with a macron ... instances of alpha represent the short IPA el a . Shift to long e In the Attic Greek Attic Ionic Greek Ionic dialect of Ancient Greek, long alpha IPAblink a fronted to IPAblink eta . In Ionic ... , and rho , , e, i, r . In Doric Greek Doric and Aeolic Greek Aeolic , long alpha is preserved ... Phonetic Alphabet , a letter based on the lower case of alpha represents the open back unrounded vowel . Upper case The uppercase letter alpha is not generally used as a symbol because it tends to be rendered identically to the uppercase A Latin A . Math and science main Alpha disambiguation The letter alpha represents various concepts in physics and chemistry , including alpha radiation , angular acceleration , alpha particle s and alpha carbon . Alpha also stands for thermal expansion ..., the letter alpha is used to denote the area underneath a normal curve in statistics when finding ... individual in a wolf or dog pack. History and symbolism Etymology Alpha was derived from aleph , which in Phoenician language Phoenician means ox . ref http www.etymonline.com index.php?search alphaalpha on the Online Etymology Dictionary ref According to Etymologicum Magnum , alpha was derived from lph to invent thus alpha is the first invented letter . ref , Alpha the letter, from alpho I invent for it was invented ... alpha stands first in the alphabet. Ammonius asks Plutarch what he, being a Boeotia n, thinks ... to Greece, placing alpha first because it is the Phoenician name for ox which, unlike Hesiod , ref ... more details
Alpha to coverage is a Multisample anti aliasing multisampling computer graphics technique useful for situations where dense foliage or grass must be rendered in a video game . This technique uses the Alphacompositingalpha channel of Texture mapping textures as a Mask computing Image masks coverage mask for anti aliasing . Alpha to coverage multisampling is based on regular multisampling, except that the Alphacompositingalpha coverage mask is Bitwise AND AND ANDed with the multisample mask. Alpha to coverage converts the Alphacompositingalpha component output from the pixel shader to a coverage mask. When the Multisample anti aliasing multisampling is applied each output fragment gets a transparency of 0 or 1 depending on alpha coverage and the Multisample anti aliasing multisampling result. See also Anti aliasing Multisample anti aliasing References reflist 2 Category Image processing Category Computer graphic artifacts de Alpha to Coverage ... more details
wiktionarypar alphaAlpha or is the first letter of the Greek alphabet. Alpha or ALPHA may also refer to TOCright Science Alpha ethology also alpha male and alpha female , the highest ranking individuals in a community of social animals alpha and beta carbon Alpha carbon in organic chemistry ALPHA Collaboration , Antihydrogen Laser PHysics Apparatus , a team of scientists Alpha particle , form of particle radiation Alpha helix , a common motif in the secondary structure of proteins Alpha taxonomy , the science of naming organisms Alpha wave s, recorded by electroencephalography H alpha , or H ... of thermal expansion in thermodynamics , a symbol for the fine structure constant in physics Alpha ... Alpha investment , a measurement of risk adjusted performance Cronbach s alpha , a statistical ... Place names Australia Alpha, Queensland United States Alpha, California Alpha, Illinois Alpha, Kentucky Alpha, Michigan Alpha, Minnesota Alpha, New Jersey Alpha, Ohio Alpha, Tennessee Alpha, Texas Alpha, Washington Alpha, Wisconsin Alpha Ridge, Alaska Arctic Ocean Alpha Ridge , an undersea ridge Media, literature and fiction Television Alpha TV , a Greek terrestrial channel The Alpha Quadrant , one of the four Galactic Quadrants in the fictional Star Trek universe Music Alpha Asia album Alpha Asia album Alpha Alice Nine album Alpha Alice Nine album , by the band Alice Nine Alpha band , a British electronic music group Alpha Sevendust album Alpha Sevendust album , by the band Sevendust Alpha Selena album Alpha Selena album ALPHA 60 , a Swedish alternative rock band Alpha , one of the tracks on the album Albedo 0.39 , composed by Vangelis Books and magazines Alpha magazine Alpha magazine , Australian men s sport magazine Alpha Books , an imprint of Penguin Group USA Alpha Knightmare ... by Lisi Harrison Gaming Alpha Magic The Gathering , the first Magic The Gathering cards set Alpha video game Alpha video game , a 1986 interactive fiction game by Square AlphaDream , a second party ... more details
An Alpha Agonist generally refers to Peroxisome proliferator activated receptor see alpha modulators. or adrenergic alpha agonist disambig ... more details
Pi AlphaAlpha is the national honor society for students of public administration . It is administered by the National Association of Schools of Public Affairs and Administration in the United States . The organization was formed to promote excellence in the study and practice of public administration and Public administration public affairs . There are 134 Pi AlphaAlpha chapters with more than 30,000 members. See also Master of Public Administration Doctor of Public Administration Master of Public Affairs Master of Public Policy Public administration theory Public policy Public policy schools External links http www.naspaa.org initiatives paa about paa paa.asp National Association of Schools of Public Affairs & Administration about Pi AlphaAlpha http www.achsnatl.org society.asp?society paa Association of College Honor Societies Pi AlphaAlpha Category Association of College Honor Societies Category Public administration Category Honor societies Category Educational organizations based in the United States honor stub ... more details
Infobox Fraternity name Alpha Beta Alpha letters ABA crest motto Books, People, Service, Life colors ... 1 url http www.kutztown.edu acad coe ls abasite files ABA Constitution.pdf title Alpha Beta Alpha Constitution publisher Alpha Beta Alpha accessdate 2009 04 15 postscript None ref Article 2 Section 1 of the Alpha Beta Alpha constitution states that Alpha Beta Alpha s purpose is to further the professional ... country USA free label free homepage http www.kutztown.edu acad coe ls abasite index.html Alpha Beta Alpha is a national honorary library Fraternities and sororities fraternity dedicated to serving ... in only 1 active chapter. History Alpha Beta Alpha was founded on May 3, 1950 but its roots reach ... encyclopedia Encyclopedia of Library and Information Science title Alpha Beta Alpha url http books.google.com ?id w6mBHs3VfCkC&pg PA167&dq 22alpha beta alpha 22 22library science 22 PPA166,M1 accessdate ... Lancour encyclopedia Encyclopedia of Library and Information Science title Alpha Beta Alpha url http books.google.com ?id w6mBHs3VfCkC&pg PA167&dq 22alpha beta alpha 22 22library science 22 PPA166,M1 ... E. Russel Library Club founded Alpha Beta Alpha, the first co educational library science fraternity in the United States. Two years later, on March 15 and March 16, the first Alpha Beta Alpha national ... Science title Alpha Beta Alpha url http books.google.com ?id w6mBHs3VfCkC&pg PA167&dq 22alpha beta alpha 22 22library science 22 PPA166,M1 accessdate 2009 04 16 year 1968 publisher Marcel Dekker ... chapter of Alpha Beta Alpha is currently located at Kutztown University of Pennsylvania . With a total ... alpha beta alpha.html title Alpha Beta Alpha publisher Kutztown University of Library Science accessdate 2009 04 15 postscript None ref The following is a short summary of the current state of Alpha Beta Alpha Sources History ref name History Cite document pages 1 url http www.kutztown.edu acad coe ls abasite information history.html title Alpha Beta Alpha History publisher Alpha Beta Alpha accessdate ... more details
enzyme Name alpha,alpha phosphotrehalase EC number 3.2.1.93 CAS number 54576 93 1 IUBMB EC number 3 2 1 93 GO code 0008788 image width caption Orphan date December 2007 In enzymology , an alpha,alpha phosphotrehalase EC number 3.2.1.93 is an enzyme that catalysis catalyzes the chemical reaction alpha,alpha trehalose 6 phosphate H sub 2 sub O math rightleftharpoons math D glucose D glucose 6 phosphate Thus, the two substrate biochemistry substrates of this enzyme are alpha,alpha trehalose 6 phosphate and water H sub 2 sub O , whereas its two product chemistry products are D glucose and D glucose 6 phosphate . This enzyme belongs to the family of hydrolase s, specifically those glycosidases that hydrolyse O and S glycosyl compounds. The systematic name of this enzyme class is alpha,alpha trehalose 6 phosphate phosphoglucohydrolase . This enzyme is also called phosphotrehalase . This enzyme participates in starch and sucrose metabolism . References reflist 1 cite journal author Bhumiratana A, Anderson RL, Costilow RN date 1974 title Trehalose metabolism by Bacillus popilliae journal J. Bacteriol. volume 119 pages 484&ndash 93 pmid 4369400 issue 2 pmc 245631 hydrolase stub Category EC 3.2.1 Category Enzymes of unknown structure ... more details
orphan date January 2010 enzyme Name alpha,alpha trehalose phosphorylase EC number 2.4.1.64 CAS number 37205 59 7 IUBMB EC number 2 4 1 64 GO code 0047656 image width caption In enzymology , an alpha,alpha trehalose phosphorylase EC number 2.4.1.64 is an enzyme that catalysis catalyzes the chemical reaction alpha,alpha trehalose phosphate math rightleftharpoons math D glucose beta D glucose 1 phosphate Thus, the two substrate biochemistry substrates of this enzyme are alpha,alpha trehalose and phosphate , whereas its two product chemistry products are D glucose and beta D glucose 1 phosphate . This enzyme belongs to the family of glycosyltransferase s, specifically the hexosyltransferases. The systematic name of this enzyme class is alpha,alpha trehalose phosphate beta D glucosyltransferase . This enzyme is also called trehalose phosphorylase . This enzyme participates in starch and sucrose metabolism . References reflist 1 cite journal author Belocopitow E, Marechal LR date 1970 title Trehalose phosphorylase from Euglena gracilis journal Biochim. Biophys. Acta. volume 198 pages 151&ndash 4 pmid 5413942 issue 1 Category EC 2.4.1 Category Enzymes of unknown structure enzyme stub it Alfa,alfa trealosio fosforilasi ... more details
Alpha Upsilon Alpha or &Alpha &Upsilon &Alpha is an Academics academic honor society recognizing excellence ... about aua.html Membership There are five different categories of membership in Alpha Upsilon Alpha ... of the Greek alphabet . The first &Alpha stands for Anagnosis , meaning reading the &Upsilon stands for Upotrophia , meaning scholarship and the second &Alpha stands for Archon , meaning leadership. Alpha Upsilon Alpha s motto is the Horace quote Lege wikt sapere aude sapere aude , which translates as Read, dare to be wise. Chapters As of June 2006, Alpha Upsilon Alpha has 44 chapters in the United ... aua Beta Beta Boston College Omicron Buffalo State College Alpha Iota Central Connecticut State ... Alpha Beta East Central University Omega Fayetteville State University Alpha Sigma Fordham University Beta Iota Framingham State College Alpha Pi Georgia Southern University Alpha Nu Governors State University Alpha Omega Holy Family University Beta Epsilon Illinois State University Alpha Phi Iowa State ... Minnesota State University Moorhead Minnesota State University Moorhead Alpha Tau Murray State University ... University Alpha Delta Northwestern Oklahoma State University Alpha Rho Philippine Normal University Alpha Upsilon Providence College Alpha Xi Purdue University Alpha Kappa Purdue University Calumet Purdue University Calumet Beta Gamma Roosevelt University Tau Saint Joseph s University Alpha Zeta Saint Xavier University Zeta Southern Utah University http www.suu.edu orgs src aua.htm Beta Alpha Troy University Troy University Dothan Alpha Lambda University of Georgia Xi University of Illinois at Urbana Champaign University of Illinois Urbana Champaign https netfiles.uiuc.edu kparker2 www Alpha 20Upsilon 20Alpha index.htm Beta Eta University of Nebraska at Omaha Alpha Eta University of Northern Iowa Alpha University of Wisconsin Whitewater Alpha Theta Weber State University Beta Zeta West Chester ... Alpha Chi Western Illinois University Mu Widener University Alpha Psi External links http www.reading.org ... more details
Infobox Fraternity letters ATA name Alpha Tau Alpha founded October 27, 1921 birthplace University of Illinois ... state MN country USA homepage http www.ataonline.org Alpha Tau Alpha ATA is a National Professional ... other colleges concerning the organization of Alpha Tau Alpha chapters. Colleges with an Agricultural ... of Illinois granted Alpha Chapter of ATA a permit for a national constitution. The interest of A. W. Nolan in Alpha Tau Alpha continued beyond his retirement at the University of Illinois in 1938. He ... is protected by copyright. The official colors of Alpha Tau Alpha are orange and brown. Purpose The purpose of Alpha Tau Alpha is to promote the highest standards of agricultural education ... Chapters class wikitable Chapter University Chapter University Alpha University of Illinois Omega Purdue University Beta University of Nebraska AlphaAlpha University of Minnesota Gamma University of California Davis Alpha Beta Oklahoma State University Delta George Peabody College Alpha Gamma Arkansas State University Epsilon University of Florida Alpha Delta Kansas State University Zeta Colorado State University Alpha Epsilon University of Arkansas Pine Bluff Eta The Pennsylvania State University Alpha Zeta Rutgers University Theta University of Wyoming Alpha Eta Prairie View A&M University Iota Louisiana State University Alpha Theta Florida A&M University Kappa Clemson University Alpha Iota University of Maryland Eastern Shore Lambda Arkansas State Teachers College Alpha Kappa California State University Fresno Mu Texas A & I University Alpha Lambda Virginia Polytechnic Institute Nu University of Missouri Alpha Mu University of Wisconsin River Falls Xi Illinois State University Alpha Nu Alcorn State University Omicron Mississippi State University Alpha Xi North Carolina A&T State University Pi New Mexico State University Alpha Omicron South Dakota State University Rho University of Puerto Rico Alpha Pi Fort Valley State College Sigma Utah State University Alpha Rho Northwest ... more details
enzyme Name alpha,alpha trehalase EC number 3.2.1.28 CAS number 9025 52 9 IUBMB EC number 3 2 1 28 GO code 0004555 image width caption Orphan date December 2007 In enzymology , an alpha,alpha trehalase EC number 3.2.1.28 is an enzyme that catalysis catalyzes the chemical reaction alpha,alpha trehalose H sub 2 sub O math rightleftharpoons math 2 D glucose Thus, the two substrate biochemistry substrates of this enzyme are alpha,alpha trehalose and water H sub 2 sub O , whereas its product chemistry product is D glucose . This enzyme belongs to the family of hydrolase s, specifically those glycosidases that hydrolyse O and S glycosyl compounds. The systematic name of this enzyme class is alpha,alpha trehalose glucohydrolase . This enzyme is also called trehalase . This enzyme participates in starch and sucrose metabolism . Structural studies As of late 2007, two tertiary structure structures have been solved for this class of enzymes, with Protein Data Bank PDB accession codes PDB link 2JF4 and PDB link 2JG0 . References reflist 1 cite journal author KALF GF, RIEDER SV date 1958 title The purification and properties of trehalase journal J. Biol. Chem. volume 230 pages 691&ndash 8 pmid 13525386 issue 2 cite journal author Myrback K and Ortenblad B date 1937 title Trehalose und Hefe. II. Trehalasewirkung von Hefepraparaten journal Biochem. Z. volume 291 pages 61&ndash 69 hydrolase stub Category EC 3.2.1 Category Enzymes of known structure ... more details
Infobox Fraternity letters name Alpha Phi Alpha crest Image AlphaPhiAlphaCrest.jpg center 100px The crest of Alpha Phi Alpha founded start date and years ago mf yes 1906 12 4 birthplace Cornell University type Fraternities and sororities Social mission div style font size 88 Alpha Phi Alpha Fraternity ... phi alpha.com Alpha Phi Alpha.com footnotes Alpha Phi Alpha Fraternity, Inc. has continued to supply .... Alpha Phi Alpha is a Fraternities and sororities fraternity that was founded on December 4, 1906 ... Alpha Phi Alpha founders Seven Jewels . Alpha Phi Alpha is the first intercollegiate Greek letter ... in 1907. From 1908, Alpha Phi Alpha became the prototype for other Black Greek letter organizations ..., Europe, Caribbean, and Asia. Alpha Phi Alpha evolved into a primarily service organization and provided ... of Alpha Phi Alpha, and it jointly leads philanthropic programming initiatives with March of Dimes ... . Members of Alpha Phi Alpha include Jamaica n Prime Minister Norman Manley , Nobel Prize winner ... Quad of Cornell University in 1919. Cornell University was the site of the founding of Alpha Phi Alpha ... students. Alpha Phi Alpha was organized with the stated aim to provide a mechanism to build ... s Alpha chapter at Cornell University. At the first meetings during the 1905 1906 school year, members ... letters Alpha Phi Alpha , and Robert Harold Ogle proposed the colors black and Old Gold old gold ... Alpha Phi Alpha co founder Charles Henry Chapman , George Biddle Kelley , Nathaniel Allison Murray ... Soon after the Cornell organization formed, members opened Alpha Phi Alpha chapters at other ... and universities historically black colleges . ref Wesley 1981, op. cit. , p. 43. ref Chapters of Alpha Phi Alpha are given Greek alphabet Greek letter names in order of installation into the Fraternity ... of the Fraternity would be created following the establishment of the fourth chapter of Alpha Phi Alpha. ref name USWW Cite web url http apa.usww.com alphatoc frathistory.htm title A Fraternity ... more details
Infobox Fraternity name Alpha Chi Alpha letters crest motto Barn Side Up colors Black and Yellow ... AXA.jpg left thumb , view from front of renovated house. Alpha Chi Alpha , Alpha Chi ... College . Alpha Chi Alpha is a member of Dartmouth College Greek organizations Dartmouth s Greek ... houses that fall under the umbrella of the Greek system. Alpha Chi Alpha is referred to among Dartmouth students as simply Alpha Chi. The house which is located at 13 Webster Avenue on the Dartmouth ... of Alpha Chi to make way for a new expanded basement and main floor area which will act as new ... of Events in AXA s History big colspan 2 align center small Important dates in the history of Alpha Chi Alpha align right 1919 Alpha Chi Rho Phi Nu Chapter . National. align right 1935 Merged with Alpha Sigma Phi , Phi Kappa Sigma , & Lambda Chi Alpha to become Gamma Delta Chi . align right 1957 Phi Nu Chapter of AXP reformed by split from GDX. align right 1963 Became Alpha Chi Alpha AXA ... twelve Dartmouth men founded the Epsilon Kappa Alpha fraternity. In 1919, this lodge became the Phi Nu chapter of the national fraternity, Alpha Chi Rho . The house was located in the back of the present White Church. Alpha Chi Rho flourished at Dartmouth for about ten years. In the early 1930s ... and general financial difficulties caused by the Depression. It was at that time when Alpha Chi Rho, along with Lambda Chi Alpha , Phi Kappa Sigma , and Alpha Sigma Phi , who were each having difficulties ... Nu chapter of Alpha Chi Rho. The brotherhood moved to the present house on Webster Avenue, bought ... voted to name the disaffiliated fraternity Alpha Chi Alpha and it has been in continual operation ever since. 13 Webster Avenue Image Alpha Chi Alpha 2005.JPG left thumb Alpha Chi Alpha, panoramic ... construction was completed in fall 2004, the newest reincarnation of Alpha Chi Alpha is able to house ... references External links http www.alphachialpha.org Alpha Chi Alpha s Homepage http www.Dartmouth.edu ... more details
Infobox Fraternity letters name Alpha Sigma Alpha crest Image Alpha Sigma Alpha Crest.jpg founded start date and years ago 1901 11 15 birthplace Longwood University , Farmville, Virginia type Social emphasis scope National mission vision motto Aspire, Seek, Attain maxim colors color box DC143C Crimson ... Alpha Sigma Alpha is a US national sorority founded on November 15, 1901 at Longwood University Longwood College now University in Farmville, Virginia . There are now over 145 chapters of Alpha Sigma Alpha nationwide with more than 100,000 members. History In Farmville, Virginia what is now ... sororities were founded at the same time as Alpha Sigma Alpha in Farmville, they are now known as http fratcomm.blogspot.com 2010 08 farmville four.html the Farmville Four . Alpha Sigma Alpha, Sigma Sigma Sigma, Kappa Delta and Zeta Tau Alpha. On November 15, 1901 that goal was accomplished when Alpha Sigma Alpha was named and chartered. The open motto of the sorority is Aspire, Seek, Attain. The national ... of Important Events 1901 Founding of Alpha Sigma Alpha at Longwood College on November 15 br 1913 Ida ... president at National Convention in Boston, Massachusetts br 1951 Alpha Sigma Alpha petitions ... Br 2008 ASA adopts official ladybug mascot named Dot Philanthropies In 1976 Alpha Sigma Alpha National ... then it has taken several projects under its wing. In 1989 Alpha Sigma Alpha set up the Alpha Sigma Alpha Foundation. Initially it was a scholarship granting body, but it has branched out to support ... Alpha Sigma Alpha member S. June Smith ref name Name cite web url http www.sjunesmith.com drsmith.htm ... . ref cite web url http www.alphasigmaalpha.org asa foundation scholarships.htm title Alpha Sigma Alpha Foundation Scholarships, Awards and Grants publisher Alpha Sigma Alpha accessdate 2007 04 10 ref ... of Alpha Sigma Alpha chapters References reflist External links http www.alphasigmaalpha.org Alpha Sigma Alpha Sorority National Website http www.sjunesmith.com S. June Smith Center National Panhellenic ... more details
Infobox Fraternity letters A A name Alpha Kappa Alpha motto By Culture and By Merit ref name akaterms crest File AKAshield2.png center 130px The official crest of Alpha Kappa Alpha. founded Start date ... zip code 60637 chapters 900 ref cite news first last coauthors title Alpha Kappa Alpha s International ... American Alpha Kappa Alpha A A is the first Greek alphabet Greek lettered sorority established and incorporated ... and the Vision . Lexington University Press of Kentucky, 2005. p. 342 ref Alpha Kappa Alpha was Incorporation ... main index.php?option com content&task view&id 26&Itemid 34 title Historical Overview publisher Alpha Kappa Alpha Sorority, Incorporated. International Region accessdate 2007 05 09 ref After the organization s establishment over a century ago, Alpha Kappa Alpha has helped to improve social and economic ..., and business. Alpha Kappa Alpha is part of the National Pan Hellenic Council NPHC . The current ... Center at Howard University accessdate 2007 10 12 ref Miner Hall was the site of Alpha Kappa Alpha ... aka newfacts.html archivedate 2005 05 25 title Alpha Kappa Alpha Important Facts publisher Lambda Eta Chapter of Alpha Kappa Alpha Sorority, Incorporated accessdate 2007 05 30 ref The building was demolished ... member of Alpha Phi AlphaAlpha Phi Alpha Fraternity s Beta chapter at Howard in 1907. ref name skip2 ... Alpha Kappa Alpha in the fall of 1908. ref name Ross 166 ref name McNealey19 With Hedgeman serving ... the motto, chose the favorite colors, and named the sorority Alpha Kappa Alpha. ref name Ross 166 ... of AKA publisher Lambda Eta Chapter of Alpha Kappa Alpha Sorority, Incorporated accessdate 2007 ... PDF title Alpha Kappa Alpha Timeline publisher Alpha Kappa Alpha Sorority, Incorporated accessdate 2007 05 09 ref On May 25, 1909, Alpha Kappa Alpha held its first Ivy Week, a celebration that included ... archivedate 2006 08 29 title Ethel Jones Mowbray publisher Theta Rho Chapter of Alpha Kappa Alpha Sorority, Incorporated accessdate 2007 10 27 ref Struggles and Incorporation 1912 1913 File AKAcertificate.jpg ... more details
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