
	Where results make sense

Topic: Anthraquinone

Related Topics

Anthracene

Aliphatic hydrocarbon

Alizarin

Pigment

Citrulline

Naphthalene

Oxidation

Aliphatic

Citronella

List of compounds

HVDC

Anthocyanin

Aromaticity

Pepsi Max

In the News (Sun 6 Dec 09)

Northern Trust

Marvin Harrison

Peter Chernin

Gary Locke

Match Play

Penelope Cruz

Mickey Rourke

AR Rahman

Danny Boyle

Hugh Jackman

	Molecules spontaneously form honeycomb network featuring pores of unprecedented size
		Spreading anthraquinone, a common and inexpensive chemical, on to a flat copper surface, Greg Pawin, a chemistry graduate student working in the laboratory of Ludwig Bartels, associate professor of chemistry, observed the spontaneous formation of a two-dimensional honeycomb network comprised of anthraquinone molecules.
		Anthraquinone molecules, however, form chains that weave themselves into a sheet of hexagons on the copper surface, forming a network similar to chicken wire.
		The substrate-meditated repulsive interactions are: (a) expansion of the copper surface because the anthraquinone molecules 'dig' their oxygen 'heels' into it; (b) electrostatic repulsion due to slightly negative charging of the anthraquinone molecules; or (c) a combination thereof.
	www.eurekalert.org /pub_releases/2006-08/uoc--msf081506.php (1017 words)

	Anthraquinone - Wikipedia, the free encyclopedia
		Anthraquinone (9,10-dioxoanthracene) is an aromatic organic compound whose structure is shown to the right.
		Anthraquinone melts at 286°C, boils at 379.8°C. It is insoluble in water or alcohol, but dissolves in nitrobenzene and aniline.
		Anthraquinone is also used as a catalyst in production of wood pulp in pulp and paper industry.
	en.wikipedia.org /wiki/Anthraquinone (210 words)

	Technology Review: Walking Molecules Pick Up Cargo
		Anthraquinone molecules move in a straight line on a copper surface, while carbon dioxide moves randomly.
		The researchers, led by Ludwig Bartels, a chemistry professor at the University of California, Riverside, use a molecule called anthraquinone, an organic compound containing a chain of three benzene rings, with two oxygen atoms attached to the central ring, one on each side.
		When the researchers place anthraquinone molecules on a flat copper surface at temperatures of around -223 ºC, the molecules move in a straight line.
	www.technologyreview.com /Nanotech/18091 (676 words)

	Encyclopedia: Anthraquinone (Site not responding. Last check: )
		Anthraquinone is an aromatic organic compound whose structure is shown to the right.
		Anthraquinone, a polycyclic aromatic hydrocarbon containing two opposite carbonyl groups (C=O) at 9,10 position, is yellow or light gray to gray-green crystal powder; insoluble in water.
		Anthraquinone is the most important quinone derivative of anthracene as the parent substance of a large class of dyes and pigments.
	www.nationmaster.com /encyclopedia/Anthraquinone (482 words)

	EPA: Anthraquinone (122701) Fact Sheet
		Based on the data obtained from the mouse lymphoma forward mutation assay, anthraquinone technical did not induce a significant increase in mutant cells relative to controls; no dose-response effects nor cell toxicity effects were observed.
		Anthraquinone is not toxic and therefore there would be no expected cumulative effects from common mechanisms of toxicity.
		Because anthraquinone is not persistent in the environment (as demonstrated by the data), regular applications are required to keep the geese away.
	www.epa.gov /oppbppd1/biopesticides/ingredients/factsheets/factsheet_122701.htm (1237 words)

	NTP: Abstract for TR-494 - Anthraquinone
		Anthraquinone is used as an intermediate in the manufacture of dyes and pigments, an additive in the kraft pulping process in the paper industry, a catalyst in the isomerization of vegetable oils, an accelerator in nickel electroplating, and as a bird repellant.
		The incidences of hematopoietic cell proliferation were increased in all exposed groups of males and females, and pigmentation was observed in the spleen of all exposed mice (except one male and one female in the 30,000 ppm groups).
		Exposure to anthraquinone for 2 years caused increases in the incidences of nonneoplastic lesions of the kidney, liver, spleen, and bone marrow in male and female rats, the liver, urinary bladder, and spleen in male and female mice, and the thyroid gland and kidney in male mice.
	ntp-server.niehs.nih.gov /index.cfm?objectid=070AFB30-E3C1-3AF8-65739A2BF09C05A7 (2598 words)

	Effects of 9,10 anthraquinone on ruminal fermentation, total-tract digestion, and blood metabolite concentrations in ...
		The effect of feeding 500 ppm of 9,10 anthraquinone (AQ) to sheep on the concentration of hydrogen in ruminal gas.
		The effect of feeding 500 ppm of 9,10 anthraquinone (AQ) to sheep on the concentration of methane in ruminal gas.
		Inhibition of sulfate reduction to sulfide by 9,10 anthraquinone in in vitro ruminal fermentations.
	jas.fass.org /cgi/content/full/81/1/323 (2658 words)

	[No title] (Site not responding. Last check: )
		Therefore, the anthraquinones of the present invention, which are useful as antihelminthic compounds, include both the particular anthraquinones compounds with the antihelminthic activity per se and anthraquinones compounds which are hydrolyzed in the gut of the helminth or warm-blooded animal, including humans, or hydrolyzed in vitro to produce the compounds with the antihelminthic activity.
		Anthraquinones which can be hydrolyzed in vitro or in vivo such as in the gut of helminths or warm-blooded animals or humans to anthraquinones with antihelminthic activity are also useful as antihelminthic compounds.
		In the aforementioned compositions, the anthraquinone is inhibitory at a
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=03/89577.031030&ELEMENT_SET=DECL (7376 words)

	Fiber-reactive anthraquinone dyes - Patent 5607481
		An anthraquinone compound as claimed in claim 1, wherein R.sup.3 is chlorine, bromine or a sulfo group which is in the ortho position relative to the NH-R.sup.1 group.
		An anthraquinone compound as claimed in claim 1, wherein W is 1,2-ethylene or 1,3-propylene.
		An anthraquinone compound as claimed in claim 1, wherein L is chlorine, bromine, --OSO.sub.3 M, --SSO.sub.3 M or --OPO.sub.3 M.sub.2 where M is hydrogen or an alkali metal.
	www.freepatentsonline.com /5607481.html (3339 words)

	Information Requests for Corrections and HHS' Responses
		Clear objective presentation of the non-mutagenicity of Anthraquinone is absolutely vital for meaningful evaluation of the conclusions presented in the draft TR494 study; the present draft TR494 is contradictory and, therefore, incomprehensible.
		NTP was informed that the mutagenicity of the TR494 Anthraquinone sample was not solely related to the presence of 9-Nitroanthracene in a letter from CPC to Dr. Kenneth Olden dated October 16, 2000.
		A portion of our sample of the NTP Anthraquinone test material was "acid purified" by dissolution in concentrated sulfuric acid (the same procedure followed with the Eastman Chemical reagent grade anthraquinone sample described to you in earlier letters) and resubmitted for Ames testing.
	aspe.hhs.gov /infoquality/request&response/12a.shtml (3178 words)

	ANTHRAQUINONE, C14H802 - Online Information article about ANTHRAQUINONE, C14H802
		boil, and the anthracene is rapidly oxidized to anthraquinone.
		It may be prepared in a similar manner by heating phthalyl chloride with benzene in the presence of aluminium chloride.
		Anthraquinone crystallizes in yellow needles or prisms, which melt at 277° C. It is soluble in hot benzene, sublimes easily, and is very See also:
	encyclopedia.jrank.org /ANC_APO/ANTHRAQUINONE_C14H802.html (592 words)

	ANTHRAQUINONE (9,10-DIOXOANTHRACENE)
		Anthraquinone is a starting material for the production of coloring compounds, antioxidants, and polymerization inhibitors.
		Anthraquinone is used in paper industry as a catalyst to increase the pulp production yield and to improves the fiber strength through reduction reaction of cellulose to carboxylic acid.
		Anthraquinones derivatives are also used in manufacturing drugs.
	www.chemicalland21.com /arokorhi/specialtychem/finechem/ANTHRAQUINONE.htm (233 words)

	ARS \| Publication request: Novel Derivatives of 9,10-Anthraquinone Are Selective Algicides Against the Musty-Odor ... (Site not responding. Last check: )
		In laboratory tests, anthraquinone was previously found to be effective in reducing the abundance of the blue-green alga that produces musty off-flavor in farm-raised channel catfish.
		However, anthraquinone is not water-soluble and did not reduce the abundance of the musty blue-green alga in catfish pond studies.
		The new derivatives of anthraquinone are water-soluble and were effective in reducing the abundance of the musty odor compound and the musty blue-green alga in water in catfish pond studies.
	www.ars.usda.gov /research/publications/publications.htm?SEQ_NO_115=147015 (396 words)

	Regulation of anthraquinone biosynthesis in cell cultures of Morinda citrifolia (Site not responding. Last check: )
		The accumulation of anthraquinones is correlated with isochorismate synthase activity under a variety of conditions, which indicates that under most circumstances the concentration of the branchpoint metabolite chorismate is not a rate-limiting factor.
		The complexity of the interference of glyphosate with anthraquinone biosynthesis is illustrated by the effect of the inhibitor in cell cultures of the related species Rubia tinctorum L. in these cells, glyphosate leads to an increase in anthraquinone content and a concomitant rise in ICS activity.
		All data indicate that the main point of regulation in anthraquinone biosynthesis is located at the entrance of the specific secondary route.
	www.samento.com.ec /sciencelib/noni/noniab019.html (316 words)

	Anthraquinone compounds - Patent 4442288
		Water-soluble anthraquinone compounds of the formula (1) ##STR1## wherein M is a hydrogen atom or the equivalent of a metal, such as in particular sodium or potassium, R is a hydrogen atom, a halogen atom, the methyl, ethyl, methoxy, ethoxy or carboxy group, and X is the vinyl group, a.beta.-thiosulfatoethyl,.beta.-sulfatoethyl or the.beta.-chloroethyl group.
		Condensation of the anthraquinone compound of the formula (2) with cyanuric chloride is carried out in general in aqueous medium or in an aqueous-organic solvent at a temperature of from -5.degree.
		The reaction of the anthraquinone compound of the formula (2) with a dichlorotriazinyl compound of the formula (5) is carried out in general in aqueous medium, optionally while using a organic solvent, at a temperature of from 0.degree.
	www.freepatentsonline.com /4442288.html (2830 words)

	UBEP 2000 Seventh Annual Undergraduate Research Symposium
		The advantage in using a molecule such as anthraquinone as a photocleaver is that it has been shown in the literature to have an extraordinary ability to photocleave DNA with exposure to light.
		Cleavage experiments are currently performed by first allowing the anthraquinone conjugate to bind the radioactively tagged DNA oligo, and then exposing this complex to a ultra violet light source which is specific to anthraquinone's absorbance peak at 330nm.
		Recently we have thought of using a derivative of anthraquinone which is prevented from intercalating in DNA due to its shape, thus increasing the ability of the conjugate to directly cleave DNA.
	lifesciences.asu.edu /ubep2000/abstracts/abst1 (659 words)

	[No title] (Site not responding. Last check: )
		The anthraquinone derivatives referred to, and the anthraquinone derivatives obtained in the hydrogenation stage will hereinafter be known by the general name reactants.
		In the hydrogenation stage of the anthraquinone process, the alkylanthraquinones and alkyl tetrahydroanthraquinones contained in the working solution are at least partially converted with hydrogen or a hydrogen-containing gas in the presence of a catalyst into the corresponding alkylanthrahydroquinones or alkyltetrahydroanthraquinones.
		The working solution, which was withdrawn from an anthraquinone circulation process after the extraction stage, contained alkyl aromatics and tetrabutylurea as solvents and a mixture of 2-alkylanthraquinones and their 2-alkyltetrahydroanthraquinones in a molar ratio of 1: 3.2 as reactants.
	www.wipo.int /cgi-pct/guest/getbykey5?KEY=03/82735.031009&ELEMENT_SET=DECL (2831 words)

	Hair dye compositions containing anthraquinone dyes having a quaternary ammonium side chain and neutral direct dyes - ... (Site not responding. Last check: )
		Anthraquinone compounds having a quaternary ammonium side chain and their use as hair dyes are known in the art.
		Dye compositions employing the anthraquinone dyes of the present invention may be formulated as a solution, a liquid shampoo (which can be a solution or an emulsion), a cream, a gel, a powder, or an aerosol.
		These dyes may be incorporated with the anthraquinones of the present invention provided such agents do not interfere with the dyeing ability of these dyes or react with them.
	www.patentstorm.us /patents/5891200.html (5040 words)

	Process for dyeing synthetic polyamide materials with fibre-reactive anthraquinone dyes - Patent 4693727
		Suitable anthraquinone dyes are selected anthraquinone dyes having one or two fibre-reactive groups and one or two sulfo groups, for example the anthraquinone dyes given in the Colour Index as reactive blues.
		In particular, use is made of a mixture of two anthraquinone dyes in which one component corresponds to a dye of the formula (2) and the other component corresponds to a dye of the formula (2) or (3).
		In a particularly interesting embodiment of the process according to the invention, nylon carpets are continuously dyed with anthraquinone dyes of the formula (1) or mixtures of anthraquinone dyes of the formula (1), in particular the anthraquinone dyes of the formulae (2) or (6).
	www.freepatentsonline.com /4693727.html (2603 words)

	anthraquinone -- Encyclopædia Britannica (Site not responding. Last check: )
		The group is subdivided according to the methods best suited to their application to various fibres.
		The anthraquinones occur widely in plants but in only a few animals.
		The first example was the elucidation of the alizarin structure () in 1868, followed a year later by its synthesis.
	www.britannica.com /eb/article-9007790 (263 words)

	Process for the manufacture of anthraquinone compounds - Patent 4086252
		A process as claimed in claim 1 wherein the alkenyl carboxylic acid is added to the sulphuric acid containing the aminoanthraquinone and the boric acid, metaboric acid or boric oxide, the reaction mixture is stirred at a temperature between 20.degree.
		The anthraquinone compounds containing primary amino groups used as starting materials in the process of the invention can additionally contain further substituents other than sulphonic acid groups, for example hydroxy, chlorine, bromine, methyl, methoxy,.beta.-methoxyethoxy, cyano, carboximide, nitro, aryl, arylamino, alkylamino, cycloalkylamino, dialkylamino, alkylthio and arylthio.
		As specific examples of such anthraquinone compounds there may be mentioned 1-aminoanthraquinone, 1:4-, 1:5- or 1:8-diaminoanthraquinone, 1:4:5-triaminoanthraquinone, 1:4:5:8-tetraaminoanthraquinone, 1-amino-4-hydroxyanthraquinone, 1:5-diamino 4:8-dihydroxyanthraquinone, 1:8-diamino-4:5-dihydroxyanthraquinone, 1-amino-2-(methyl- or methoxy)-anthraquinone, 1-amino-2-(bromo-, cyano-, nitro- or methyl-)-4-hydroxyanthraquinone, 1:4-diamino-2-(bromo-, cyano-, methylthio-, n-butylthio-, phenylthio, or methoxy-)anthraquinone, 1-amino-4-anilinoanthraquinone, 1:4-diamino-6:7-dichloroanthraquinone, 1:5-diamino-4-hydroxy-8-anilinoanthraquinone, 1:5-diamino-4:8-dihydroxy-2-(4'-hydroxyphenyl)anthraquinone, 1-amino-4,5-dihydroxy-8-nitroanthraquinone, and 1-amino-4:8-dihydroxy-5-nitroanthraquinone.
	www.freepatentsonline.com /4086252.html (1501 words)

	Government and academic resources on ANTHRAQUINONE
		Identification of an anthraquinone pigment and a hydroxystilbene...
		Molar Extinction of Anthraquinone: The molar extinction coefficient of Anthraquinone dissolved in ethanol based on the absorbance measurements made by RA Fuh on 6/24/97 using a Cary 3 [H. Du, RA...
		The effect of oxygen and anthraquinone on the alkaline...
	names.mongabay.com /drugs/ingredients/ANTHRAQUINONE.html (584 words)

	TAPPI Website - Role of Anthraquinone in Neutral Sulfite-AQ Pulping, 1991 Forest Products Symposium Proceedings
		A study was conducted to investigate the redox cycle of anthraquinone in neutral sulfite pulping.
		It was observed that the addition of anthraquinone to NS pulping increased the reducing power of these liquors.
		It is concluded that anthraquinone is reduced in NS liquor, and that the redox cycle is involved in NS-AQ pulping.
	www.tappi.org /s_tappi/doc_bookstore.asp?CID=5681&DID=516409 (232 words)

	Lipsome/anthraquinone drug composition and method - Patent 4797285
		The anthraquinone drug used in preparing the composition of the invention is an anti-neoplastic anthraquinone drug having an anthracene ring structure and quinone, semi-quinone, or hydroquinone functionalities carried on the ring structure.
		The interaction of an anthraquinone drug with ferric iron in the presence of lipid, and the chemical modification of the drug which can occur in vitro have been described in Section A. As noted there, the drug modification reaction occurred under anoxic conditions, and in the presence of saturated lipids only.
		For these anthraquinone drugs, the challenge for improved anti-tumor therapy is to decrease the toxicity of the liposome therapeutic composition without compromising the therapeutic effect of the drug.
	www.freepatentsonline.com /4797285.html (9669 words)

Try your search on: Qwika (all wikis)