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Topic: Abietic acid


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In the News (Mon 6 Jul 09)

  
  Klaver4Dieren: Are soft wood based pet beddings harmful?
In pine (family Pinaceae), the most important irritating compound is abietic acid, the principal sensitizer in rosin (colophony).
No significant amounts of abietic acid released into the air could be detected, but ¨peaks¨ of other volatile carbohydrates were identified.
Direct inhalation of abietic acid is therefore not likely, but the inhalation of saw dust and/or the consumption of embedding material expose the pets indirectly.
www.klaver4dieren.nl /nw011.htm   (1006 words)

  
  Resin acid
Resin acids are protectants and wood preservatives that are produced by parenchymatous epithelial cells that surround the resin ducts in trees from temperate coniferous forests.
Mixtures of isomeric carboxylic acids, such as abietic and pimaric acids, which occur in rosin in nature in solvent-free form, in the form of tree sap or wood rosin such as pine oleoresin, where they are dissolved in terpenic hydrocarbons.
Kraft soap can be reneutralized in the presence of concentrated sulphuric acid to restore the acidic forms abietic acid, palmiric acid and their isomers which form the resin acid component of a pulping byproduct called tall oil.
www.ibpassociation.org /encyclopedia/Chemistry/Resin_acid.php   (719 words)

  
 Resin - Biocrawler   (Site not responding. Last check: 2007-09-12)
Resin acids can be dissolved in alkalis to form resin soaps, from which the purified resin acids are regenerated by treatment with acids.
Abietic acid can also be extracted from rosin by means of hot alcohol; it crystallizes in leaflets, and on oxidation yields trimellitic acid, isophthalic acid and terebic acid.
Pimaric acid closely resembles abietic acid into which it passes when distilled in a vacuum; it has been supposed to consist of three isomers.
www.biocrawler.com /encyclopedia/Resin   (765 words)

  
 ABIETIC ACID
The abietic acid is collected on a Büchner funnel (Note 8) and washed with water until the acetic acid has been removed completely as indicated by tests with indicator paper.
The acid is regenerated from the pure salt by decomposition of the latter with a weak acid such as acetic acid.
The acid is regenerated from the pure salts by decomposition of the latter with a weak acid such as acetic acid, and from the pure acid derivatives by treatment with potassium hydroxide.
www.orgsyn.org /orgsyn/orgsyn/prepContent.asp?prep=cv4p0001   (915 words)

  
 Genetic Investigation of the Catabolic Pathway for Degradation of Abietane Diterpenoids by Pseudomonas abietaniphila ...
to dehydroabietic acid or for the oxidation of dehydroabietic
that the aromatization of abietic and palustric acids to dehydroabietic
Microbiology and biodegradation of resin acids in pulp mill effluents: a minireview.
jb.asm.org /cgi/content/full/182/13/3784   (4795 words)

  
 Carboxylic Acid Reactivity
Acetic acid is ten times weaker an acid than formic acid (first two entries in the second row), confirming the electron donating character of an alkyl group relative to hydrogen, as noted earlier in a discussion of carbocation stability.
Reactions in which the hydroxyl group of a carboxylic acid is replaced by another nucleophilic group are important for preparing functional derivatives of carboxylic acids.
Acid catalysis is necessary to increase the electrophilic character of the carboxyl carbon atom, so it will bond more rapidly to the nucleophilic oxygen of the alcohol.
www.cem.msu.edu /~reusch/VirtualText/crbacid1.htm   (3475 words)

  
 Use of hydrogenated abietic acid as a chain terminator for the production of polycarbonates and polyester carbonates - ...
Thermoplastic aromatic polyestercarbonates prepared from diphenols, carbonate donors, reactive aromatic dicarboxylic acid derivatives, chain terminators and optionally branching agents by an interfacial, homogenous solution or melt transesterification process, which are chain terminated with hydrogenated abietic acid in quantities of 0.6 to 12 mole-%, based on diphenols.
However, the hydrogenated abietic acid may also be initially introduced together with the diphenols in the aqueous/alkaline phase at the beginning of the reaction or even in the form of a solution in an organic solvent during the phosgenation process.
Suitable organic solvents for dissolving the hydrogenated abietic acid and, optionally, for the branching agents and the chlorocarbonic acid esters are, for example, methylene chloride, chlorobenzene, acetone, acetonitrile and mixtures of these solvents, more particularly mixtures of methylene chloride and chlorobenzene.
www.freepatentsonline.com /5554716.html   (2281 words)

  
 the Rat Report
In pine (family Pinaceae), the primary irritant identified is abietic acid, sometimes called sylvic acid.
Abietic acid itself elicits relatively weak allergic responses, however, a number of compounds formed by air oxidation of abietic acid are potent contact allergens (Hausen 1989, Karlberg 1988).
Following exposure to red cedar or plicatic acid, a person with occupational asthma may have either an immediate, or a delayed reaction, or both (Malo 1989).
www.ratfanclub.org /pine&cdr.html   (1982 words)

  
 Text.htm
The primary irritant in cedar is plicatic acid, and the primary irritant in pine is abietic acid.
Abietic acid is found in varying quantities in all pine trees (family Pinaceae) and is the main component of colophony (rosin) which is a derivative of pine trees with a number of industrial applications (Johnston 1995).
Abietic acid is found in colophony, a derivative of pine trees also called rosin.
www.bio.davidson.edu /Courses/anphys/1999/Cook/Text.htm   (3096 words)

  
 Process for the production of polychloroprene latices rich in solid matter - Patent 4338238
Alkali salts of orthophosphoric acid, diphosphoric acid or hexameta phosphoric acid may be used as phosphates.
Polymerisation is initiated and maintained using formamidine sulphinic acid in the form of a from 1.0% to 2.5% by weight aqueous solution.
Atmospheric oxygen in the vessel is expelled by nitrogen and the temperature is raised to 44.degree.
www.freepatentsonline.com /4338238.html   (2126 words)

  
 abietic acid definition - Dictionary - MSN Encarta
abietic acid definition - Dictionary - MSN Encarta
Search for "abietic acid" in all of MSN Encarta
Small business becomes a big deal on campus
encarta.msn.com /dictionary_1861582989/abietic_acid.html   (65 words)

  
 Molecular Basis of Pimarane Compounds as Novel Activators of Large-Conductance Ca2+-Activated K+ Channel alpha -Subunit ...   (Site not responding. Last check: 2007-09-12)
and abietic acid are known to be composites of pine rosin.
PiMA (a) and abietic acid (b) were applied at the concentration of 10 µM. Each cluster included 10 to 30 cells.
PiMA and abietic acid is an extension of the hydrophobic moieties
molpharm.aspetjournals.org /cgi/content/full/62/4/836   (6782 words)

  
 MFA - CAMEO - Material Description
Abietic acid is the primary resin acid component of the solid portion (rosin) of resinous exudations obtained from coniferous trees after the volatiles (turpentine) are removed.
Esters of abietic acid, such as methyl abietate, are used in lacquers and varnishes.
Resinates of heavy metals, such as lead abietate, are used as driers in oil paints and varnishes.
www.mfa.org /_cameo/frontend/fullrecord.asp?name=abietic+acid   (102 words)

  
 The Tree Acid Resins, Abietic and Plicatic Acid   (Site not responding. Last check: 2007-09-12)
Abietic and plicatic acids are found in colophony (rosin) from pine trees and from cedar respectively.
It has a complex chemical composition of which approximately 90% consists of di-terpene resin acids.
Plicatic acid is believed to be the constituent of both eastern white cedar (Thuja occidentalis)[
homepages.ed.ac.uk /jjarvis/research/thesis/node22.html   (191 words)

  
 Butterfly Products:  Warning! What you don't know about skin care products can hurt you!
Arachidonic Acid: Used by the cosmetic industry to emulsify cream and to sooth skin, this fatty acid is extracted from animal liver and in one study, has been shown to alter the skin's natural immune response.
Butyl Oleate: Derived from butyl alcohol and oleic acid, this chemical is used for manufacturing industrial solvents and lubricants and now, used as a skin conditioning ingredient in skin creams.
Lactic Acid: Made from a process of bacterial fermentation, it is caustic in concentrated solutions when applied to the skin, and may cause stinging.
butterflyproducts.com /warning.html   (2941 words)

  
 Abietic Acid : Skin Care Information   (Site not responding. Last check: 2007-09-12)
Also known as sylvic acid, abietic acid is a texturizer used in the making of soaps.
It is a natural acid which is not soluble in water, and is prepared from pine rosin.
Abietic acid can irritate human skin and mucous membranes, causing allergic reaction.
www.totalskincare.com /library/default.cfm?libraryid=1420   (140 words)

  
 Loblolly pine abietadienol/abietadienal oxidase PtAO (CYP720B1) is a multifunctional, multisubstrate cytochrome P450 ...
of oxidation of abietadiene to abietic acid in conifer secondary
Diterpene acids were monitored in the form of their methyl esters (me).
abietic acid and none of the intermediates were found in both
www.pnas.org /cgi/content/full/102/22/8060   (3984 words)

  
 A: Abietic Acid, Absinthium, Absolute...
Little is known about abietic acid toxicity; it is harmless when injected into mice but causes paralysis in frogs and is slightly irritating to human skin and mucous membranes.
The anhydride of naphthalic acid was identified as a urinary metabolite in rats treated orally with acenaphthene.
ACETIC ACID — Occurs naturally in apples, cheese, cocoa, coffee, grapes, skimmed milk, oranges, peaches, pineapples, strawberries, and a variety of other fruits and plants.
www.enotalone.com /article/5125.html   (2272 words)

  
 Abietic acid - toxicity, ecologicial toxicity and regulatory information
Abietic acid - toxicity, ecologicial toxicity and regulatory information
Abietic acid - Identification, toxicity, use, water pollution potential, ecological toxicity and regulatory information
Sorry, no water quality standards or criteria have been established for this chemical by the U.S. or Canadian governments; however, there may be criteria established for related chemicals.
www.pesticideinfo.org /Detail_Chemical.jsp?Rec_Id=PC34868   (642 words)

  
 [No title]   (Site not responding. Last check: 2007-09-12)
The compounds to be analyzed are:  EMBED MSPhotoEd.3   EMBED MSPhotoEd.3  Abietic Acid Lupenone Abietic acid is present abundant in pine resin, a sticky substance that was often used as an adhesive.
Some ancient cultures heated birch bark under reducing conditions to produce tar, which was used as a sealant and adhesive.
When a solution containing abietic acid or lupenone is analyzed, two spots are observed.
webpub.alleg.edu /employee/a/asheffie/Chem020/020F05.Activity11.TLC.doc   (291 words)

  
 Brunschwig chemie
Acetic acid glacial, analytical grade, ACS, Ph Eur, USP
Acetic acid glacial, extra pure, Ph Eur, USP, BP, FCC, E 260
Acetic acid, Acculute Standard Volumetric Solution, Final Concentration 1.0
www.brunschwig.nl /controller.php?actie=products&taal=en&letter=a   (303 words)

  
 Learn more about Abietic acid in the online encyclopedia.   (Site not responding. Last check: 2007-09-12)
Learn more about Abietic acid in the online encyclopedia.
You are here: Online Encyclopedia > Abietic acid
Hint: Play with putting spaces before and after your words to see the different results you get.
www.onlineencyclopedia.org /a/ab/abietic_acid.html   (108 words)

  
 Abietic acid - Manufacturer, Suppliers, Exporter, Import & Export
Abietic acid - Manufacturer, Suppliers, Exporter, Import & Export
You are here: Home » Suppliers selection » Abietic acid
With ExportPages you will find international Suppliers, Manufacturers and Exporters of Abietic acid from around the world.
www.exportpages.com /auswahlc/23527/Abietic+acid/1/0/data.html   (45 words)

  
 Chemical process engineering - Remove Abietic acid residus in the xylene ??
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Remove Abietic acid residus in the xylene ??
It will be appreciate if Somme one can explain to me how we can remove, destroy, precipitate the residue of Abietic acid (C20H30O2) about 1% in the XYLENE, This acid (abietic) come from gum rosin.
www.eng-tips.com /viewthread.cfm?qid=46113   (189 words)

  
 Total Skin Care Best Skincare Treatment Sun Spots Age Spots Lotion Cleanser   (Site not responding. Last check: 2007-09-12)
How does the Total Skin Care Vitamin K cream work to reduce broken blood vessels?
I was told to use a 10% glycolic acid to treat my case of acne.
What would be the best product to use?
www.totalskincare.com /library/default.cfm?letter=A   (404 words)

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