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Topic: Ester (disambiguation)


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In the News (Fri 1 Jan 10)

  
  Ester - Biocrawler   (Site not responding. Last check: 2007-10-12)
In organic chemistry and biochemistry esters are substances that have the functional group (R-COO-R') (the carbon is double-bonded to one oxygen atom and single-bonded to another) and consist of an alkane united with the residue of any oxygen acid, organic or inorganic.
Esters mainly result from the condensation (this is, a reaction that produces water) of a carboxylic acid and an alcohol.
The ester is named according to the alkyl group (the part from the alcohol) and acetate (the part from the carboxylic acid) which make it up; for example, the reaction between methanol and butanoic acid yields the ester methyl butanoate (as well as water).
www.biocrawler.com /encyclopedia/Ester   (542 words)

  
 Ester - Wikipedia, the free encyclopedia
Esters may also be formed with inorganic acids; for example, dimethyl sulfate is an ester, and sometimes called "sulfuric acid, dimethyl ester".
Esters are named similarly to salts; although they don't really have cations and anions, the terminology follows the same pattern: a more electropositive part followed by a more electronegative part.
Esters also react if heated with primary or secondary amines, producing amides.
en.wikipedia.org /wiki/Ester   (770 words)

  
 Alcohol - Encyclopedia, History, Geography and Biography
To form an ester from an alcohol and a carboxylic acid the reaction, known as Fischer esterification, is usually performed at reflux with a catalyst of concentrated sulfuric acid:
Esters may also be prepared by reaction of the alcohol with an acid chloride in the presence of a base such as pyridine.
Other types of ester are prepared similarly- for example tosyl (tosylate) esters are made by reaction of the alcohol with p-toluenesulfonyl chloride in pyridine.
www.arikah.net /encyclopedia/Alcohol   (2857 words)

  
 ester Information Center - ester baxter
Esters queen ester are named similar to salts; although they don't really have cations and anions, the terminology follows the same pattern: a more electropositive part followed by a more electronegative part.
Esters may also be formed with inorganic acids; for example, dimethyl sulfate ester lee motel lincoln city oregon ester e is an ester, and sometimes called "sulfuric acid, dimethyl ester".
An ester can be thought ester baxter of as a product of a condensation reaction of an acid (usually an organic reactions of esters acid) and an alcohol (or phenol compound), although ester williams there are other ways turflon ester ester queen of the jews to form esters.
www.scipeeps.com /Sci-Chemistry_Topics_E_-_F/ester.html   (661 words)

  
 Ester Information Center - ester baxter
Esters are named similar to ethnicity model ester salts; although they don't really have cations and anions, the terminology follows the vitamin c ester ester rolle house serum same pattern: ester rolle ester hernandez a glycerol ester of wood rosin more electropositive part followed by a more electronegative part.
Esters may also be formed with inorganic dibasic ester ester synthetic oil acids; for example, crossbow herbicide ester ester baxter dimethyl sulfate is an ester, and sometimes called "sulfuric acid, dimethyl ester".
The ester is named according to the alkyl group (the part from the alcohol) and acetate (the part from the carboxylic acid) which make it up; for example, the reaction between methanol and butyric acid yields the ester methyl butanoate (as well as water).
www.scipeeps.com /Sci-Biochemistry_Topics_E_-_F/Ester.html   (725 words)

  
 Ester - Wikipedia
Their lack of hydrogen-bond donating ability means that they can't form hydrogen bonds between ester molecules, which makes them generally more volatile than an acid or ester of similar molecular weight.
Esters also participate in ester hydrolysis - the breakdown of an ester by water.
Esters may also be decomposited by strong acids or bases.
nostalgia.wikipedia.org /wiki/Ester   (219 words)

  
 Ester - QuickSeek Encyclopedia   (Site not responding. Last check: 2007-10-12)
Esters react with water (hydrolysis) under basic conditions to form an alcohol and an acid.
Common fats and oils are mixtures of various esters, such as stearin, palmitin, and linolein, formed from the alcohol glycerol and fatty acids.
Esters perform important functions in the animal body; e.g., the ester acetylcholine is a chemical transmitter of nerve stimuli.
ethylester.quickseek.com   (899 words)

  
 Ether - Wikipedia
Like esters, ethers are limited in their ability to form hydrogen bonds.
They tend to be more hydrophobic than other, analogous condensation products (such as esters or amides).
They are also much more resistant to hydrolysis than their ester or amide analogues.
nostalgia.wikipedia.org /wiki/Ether   (208 words)

  
 Esther (disambiguation) - Wikipedia, the free encyclopedia
Esther was a 1996 television talk show hosted by Esther Rantzen
This is a disambiguation page: a list of articles associated with the same title.
If an internal link referred you to this page, you may wish to change the link to point directly to the intended article.
en.wikipedia.org /wiki/Esther_(disambiguation)   (178 words)

  
 PLA
Surgeons use it to refer to a pelvic lymphadenectomy, a procedure in which lymph nodes are removed.
As defined by the FTC, it is the manufactured fiber in which the fiber-forming substance is composed of at least 85% by weight of lactic acid ester units derived from naturally occurring sugars.
This is a disambiguation page; that is, one that just points to other pages that might otherwise have the same name.
www.teachersparadise.com /ency/en/wikipedia/p/pl/pla.html   (187 words)

  
 Valerate Cream   (Site not responding. Last check: 2007-10-12)
A valerate (compound) is a salt or ester of valeric acid.
For example, It would be foolish to have Paul Simon page made into a disambiguation page just becasue their is a congressman from Illinois with the same name.
We should avoid the use of parenthetical disambiguation whenever possible (especially for the most widely known use of a word).
www.wwwtln.com /finance/188/valerate-cream.html   (782 words)

  
 Catalyst - QuickSeek Encyclopedia   (Site not responding. Last check: 2007-10-12)
For example, the hydrolysis of esters is catalyzed by the presence of a small amount of base.
, that reacts with the ester, and the concentration of the hydroxide ion is greatly increased over that of pure water by the presence of the base.
Finely divided metals are often used as catalysts; they adsorb the reactants onto their surfaces (see adsorption), where the reaction can occur more readily.
catalyst.quickseek.com   (1560 words)

  
 Fame - Biocrawler   (Site not responding. Last check: 2007-10-12)
A Fatty acid methyl ester is a type of organic compound
This is a disambiguation page — a navigational aid which lists other pages that might otherwise share the same title.
If an article link referred you here, you might want to go back and fix it to point directly to the intended page.
www.biocrawler.com /encyclopedia/Fame   (257 words)

  
 YourArt.com >> Encyclopedia >> butter   (Site not responding. Last check: 2007-10-12)
Butterfat consists of many moderate-sized, saturated hydrocarbon chain fatty acids.
It is a triglyceride, an ester derived from glycerol and three fatty acid groups.
Butter becomes rancid when these chains break down into smaller components, like butyric acid and diacetyl.
www.yourart.com /research/encyclopedia.cgi?subject=/butter   (3515 words)

  
 Phosphodiester bonds: Facts and details from Encyclopedia Topic   (Site not responding. Last check: 2007-10-12)
Because the phosphate groups are so negatively charged, there is a large repulsion which forces the phosphates to take opposite sides of the DNA strands.
DNA ligase In molecular biology, dna ligase is an enzyme that repairs broken dna strands....
Phosphodiesterase[For more facts about this topic, click this link], Phosphodiesterase inhibitor A phosphodiesterase inhibitor is a drug that blocks one or more of the five subtypes of the enzyme phosphodiesterase (pde), preventing the inactivation of the intracellular second messengers, cyclic...
www.absoluteastronomy.com /p/phosphodiester_bonds   (1400 words)

  
 lipid anchor   (Site not responding. Last check: 2007-10-12)
For alternate meanings see anchor (disambiguation) The purpose of a ship's or boat's anchor is to attach the vessel to the ground at a specific point.
Lipids are fatty acid esters, a class of relatively water-insoluble organic molecules, which are the "basic" components of biological membranes.
Lipid bilayers form the foundation of all biological membranes.
www.33beat.com /lipid_anchor.html   (4273 words)

  
 [No title]
He used short-context information for disambiguating Hebrew words written in the regular script.
*ibm: Ester Bentur, Aviela Angel, Danit Segev and Alon Lavie: "Analysis and Generation of the Nouns inflection in Hebrew", in "Hebrew Computational Linguistics", 1992.
*levinger: Levinger, Moshe: "Morphologic Disambiguation in Hebrew", MSc thesis, Technion, 1992.
www.cs.technion.ac.il /~lcl/hebrew/Hebrew-survey   (1033 words)

  
 Bond : Bonds
Et estoient tout esperdu: Il dient leur brebiz moroient, Meis nul recouvrier n'i avoit.
Leit ester sanz plus.html">plus de tristour; Li preudons et mout tristoiez.
All is still licensed under the GNU FDL.
www.wordlookup.net /bo/bonds.html   (305 words)

  
 [No title]   (Site not responding. Last check: 2007-10-12)
Rail coach A coach is a road or rail vehicle designed to transport passengers.
A coach is a person who teaches and directs another person via encouragement and advise.
Cocaine General Chemical formula C 17 H 21 N O 4 Molecular weight 303.35 amu CAS number 50-36-2 Other names methyl ester benzoylmethylecgonine Cocaine is a crystalline alkaloid that is obtained from the leaves of the coca stimulant of the central nervous system anesthetic that is used in eye and nasal surgery.
www.en-cyclopedia.com /index1/co   (1911 words)

  
 Esther - Indopedia, the Indological knowledgebase
Esther (אסתר, Standard Hebrew Ester, Tiberian Hebrew ʾEstēr) was a woman in the Hebrew Bible, the queen of Ahasuerus (Xerxes I), and heroine of the Biblical Book of Esther which is named after her.
According to the rabbis and the Midrash, and most Christian scholars, she was a Jewish woman named Hadas'sah ("myrtle"), but when she entered the royal harem she received the name by which she henceforth became known.
Recommended Font to see diacritics - VU Arial.
www.indopedia.org /Esther.html   (506 words)

  
 c
This page is about the letter C itself.
For other uses of C, see C (disambiguation).
Ww Xx Yy (lowercase c) is the third letter of the Roman alphabet.
www.etigazette.com /Top-News-Searches-2005-Bud-to-Cad/c.php   (1705 words)

  
 ATP (disambiguation): Facts and details from Encyclopedia Topic   (Site not responding. Last check: 2007-10-12)
ATP (disambiguation): Facts and details from Encyclopedia Topic
ATP is an acronym A word formed from the initial letters of a multi-word name
Adenosine triphosphate A nucleotide derived from adenosine that occurs in muscle tissue; the major source of energy for cellular reactions
www.absoluteastronomy.com /a/atp_disambiguation2   (444 words)

  
 Sunday_Service_111
So they call it like a free copyright.
For other uses of this term, see Esther (disambiguation).
Haddassah more commonly known as Esther (אֶסְתֵּר, Standard Hebrew Ester, Tiberian Hebrew ʾEstēr) was a woman in the Hebrew Bible, the queen of Ahasuerus (commonly identified with Xerxes I or Artaxerxes I), and heroine of the Biblical Book of Esther which is named after her.
www.thechurch-ministries.org /Sunday_Service_111.html   (3495 words)

  
 GenieLab::Music Elefant   (Site not responding. Last check: 2007-10-12)
:''For other uses, see Elephant (disambiguation).'' {{tankimage
Make Up, Now That I Miss Her, Misfit, Bokkie, Tonight Let's Dance, Static on Channel 4, Sunlight Makes Me Paranoid, Annie, Love, Ester
Users who say they like Elefant also say they like:
www.genielab.com /artist/113762   (240 words)

  
 VA News and associated items of interest - Topic Powered by eve community
Agent Orange is a roughly 1:1 mixture of the two phenoxy herbicides in ester form, 2,4-dichlorophenoxyacetic acid (2,4-D) and 2,4,5-trichlorophenoxyacetic acid (2,4,5-T).
These herbicides were developed during the 1940s by independent teams in England and the United States for use in controlling broad-leaf plants.
For other uses of "Agent Orange", see Agent Orange (disambiguation).
forums.military.com /groupee/forums/a/tpc/f/9631980444/m/8311979586/p/40   (10820 words)

  
 BACK ISSUES OF LANGUAGE AND SPEECH   (Site not responding. Last check: 2007-10-12)
The behaviour of H* and L* under variations in pitch range in Dutch rising contours
Focus and the interpretation of pitch accent: Disambiguating embedded questions
Mode of disambiguation and garden-path strength: An investigation of subject-object ambiguities in German
www.ling.ed.ac.uk /~lgsp/back_issues.html   (1303 words)

  
 LREC 2004   (Site not responding. Last check: 2007-10-12)
Evaluating Variants of the Lesk Approach for Disambiguating Words
Bordel G., Ezeiza A., Lopez de Ipina K., Méndez M., Peñagarikano M., Rico T., Tovar C., Zulueta E. The ESTER Evaluation Campaign for the Rich Transcription of French Broadcast News
Word Sense Disambiguation as a Wordnets Validation Method in Balkanet
www.lrec-conf.org /lrec2004/article.php3?id_article=20   (5440 words)

  
 Print Version
Tarau presented A Logic Programming Framework for Semantic Interpretation with WordNet and PageRank, coauthored with R. Mihalcea and E. Figa.
The paper examined the application of the PageRank ranking algorithm, of Google's fame, to the disambiguation of natural language sentences.
The prototype is mainly written in Jinni (a Prolog's variant), with some parts developed in Java.
www.cs.kuleuven.ac.be /~dtai/projects/ALP/newsletter/nov04/nav/print/all.html   (12442 words)

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