Naphthalene disulfonate

The Chemicaly3.bstractIndexis 2,7-naphthalene-disulfonic acid, 4-amino-5-hydroxy-3-[[4 -[(4-hydroxyphenyl)azo] [l,l -biphenyl]-4-yl]azo]-6-(phenylazo)-, disodium salt. 

The separation of unsaturated fatty acids by HPLC and by CZE has been compared, with applications for such separations in food research and in cancer research.72 A mobile phase containing naphthalene disulfonate,... 

KEYWORDS Mindanao Geothermal Production Field, naphthalene disulfonates, Icebox TRMASS, TRINV, TRCOOL, Marbel, Sandawa... 

Figure 3 summarizes the flow paths of the reinjected fluid coming from well KL1RD elucidated through the injection of 2,6-naphthalene disulfonate. 

FIerras, E.B. 2004. The Naphthalene Disulfonate Tracer Test in the Mahanagdong Field, Leyte. Proceedings, 25th Annual PNOC-EDC Geothermal Conference. 2005. 

At least two groups have tested the effects of blockade of the anion channel on the production of O by PMNs Gennaro and Romeo found that the production of O by bovine PMNs was reduced by the blockers of the anion channels SITS (4-acetamido-4 -isothiocyanostilbene-2,2 -disulfonic acid) and ANS (anilino naphthalene disulfonic acid). The consumption of Oj was unaffected. In accord with the expectation if the effects of these agents were to block the anion channel, replace-... 

In acid medium, fluoride reacts instantaneously with zirconyl-dye lake which is composed of zirconyl chloride octahydrate, ZrOCl2 8 H20, and sodium 2-(parasulfophenylazo)-l,8-dihydroxy-3,6-naphthalene disulfonate (SPADNS), displacing the Zr2+ from the dye lake to form a colorless complex anion, ZrF62 and the dye. As a result, the color of the solution lightens as the concentration of F increases. 

Zirconyl-acid-SPADN reagent is made by combining equal volumes of sodium 2-(parasulfophenylazo)-l,8-dihydroxy-3,6-naphthalene disulfonate (SPADN) with zirconyl-acid reagent. The former is prepared by dissolving 1 g of it in 500 mL distilled water. The latter is made by dissolving 0.14 g zirconyl chloride octahydrate in 50 mL of distilled water followed by addition of 350 mL cone. HC1 and dilution to 500 mL. 

Cugat MJ, Borrull M. Comparative study of capillary zone electrophoresis and micellar electrokinetic capillary chromatography for the separation of naphthalene-disulfonate isomers. Analyst 2000 125 2236. 

Free formaldehyde is reacted with acetylacetone in the presence of an excess of an ammonium salt to form the yellow fluorescent compound, 3,5-diacetyl-1,4-dihydrolutidine and subsequently determined spectrophotometrically in methods A-E (14). In these methods, the test sample must be colorless and free from other carbonyl compounds. Some other derivatives have been used to analyze formaldehyde. For example, formaldehyde was reacted with sodium 4,5-dihydroxy-2,7-naphthalene disulfonate in sulfuric acid solution to yield a purple color (580 nm) and then subjected to colorimetric analysis. A purple-colored pararosaniline derivative was used to analyze formaldehyde in air (15). Air sample was passed through an aqueous solution which contained 0.4% of 3-methyl-2-benzothiazolone hydrazone hydrochloride and then a dye produced was determined at 635 or 670 nm (16). Molecular sieve (1.6 mm pettet) was used to trap formaldehyde in air samples. The formaldehyde... 

SYNS A.F. RED No. 1 CERVEN KUMIDINOVA C.1.16155 C.I. FOOD RED 6 C.I. FOOD RED 6, DISODIUxM SALT DISODIUM-3-HYDROXY-4-((2,4,5-TRIMETHYLPHENYL)AZO)-2,7-NAPHTHALENE-DISULFONATE DISODIUM-3-HYDROXY-4-((2,4,5-TRIMETHYLPHENYL)AZO)-2,7-NAPHTHALENE-DISULFONIC ACID DISODIUM-3-HYDROXY-4-((2,4,5-TRIMETHYLPHENYL)AZO)-2,7-NAPHTHALENE-DISULPHONATE DISODIUM-3-HYDROXY-4-((2,4,5-TRIMETHYLPHENYL)AZO)-2,7-NAPHTHALENE-DISULPHONIC ACID DOLKWAL PONCEAU 3R EXT. D C RED No. 15 3-HYDROXY-4-((2,4,5-TRIMETHYLPHENYL)AZO)-2,7-NAPHTHALENE-DISULFONIC ACID, DISODIUM SALT 3-HYDROXY-4-((2,4,5-TRIMETHYLPHENYL)AZO)-2.7-NAPHTHAL-ENEDISULPHONIC ACID, DISODIUM SALT MAPLE PONCEAU 3R PONCEAU 3R SODIUM CUMENE-AZO-P-NAPHTHOLDISULPHONATE USACERTRED No. 1... 

A mixture of 80 g. (0.24 mole) of the sodium salt of 2,7-naphthalene-disulfonic acid and 240 g. (4.2 moles) of potassium hydroxide is placed... 

When given orally, 8% of the amaranth is absorbed from the intestinal tract. Intestinal flora have a reducing effect on amaranth, and azo reduction is also mediated by the hepatic monooxygenase system. Aromatic amine metabolites, including 1-amino-4-naphthalene sulfonic acid and l-amino-2-hydro-xy-3,6-naphthalene disulfonic acid, are excreted in the urine and bile. 

Continuous-monitoring methods for assay of TR-ACP activity are based on the principle introduced by Hillmann in which a-naphthoi released from its phosphate ester forms a colored product with the stabilized diazonium salt of 2-amino-5-chlorotoluene-1,5-naphthalene disulfonate (Fast Red TR). The introduction of alcohols, such as 1,5-pen-tanediol, accelerates the reaction and increases sensitivity by acting as phosphate acceptors in transfer reactions. The addition of sodium tartrate inhibits the sensitive isoenzymes (i.e., prostatic and lysosomal ACPs) if they are present in the sample. 

Note There are several other isomeric forms of dihy-droxynaphthalene, (1,5- 1,6- 1,7- 1,8- 2,3- 2,6- 2,7-). They are derived by heating a naphthalene disulfonic acid isomer with caustic soda and are soluble in alcohol and ether, and sparingly soluble in water mp ranges from 136C (1,6-) to 260C (2,6-). Use Organic dyes. 

HIV reverse transcriptase (HIV RT) and protease (HIV PR) are essential for the matnration and prodnction of infectious viral particles. A combined inhibition of HIV RT and HIV PR is capable of redncing the viral load in blood patients. These enzymes, which exist respectively as an heterodimer and an homodimer for HIV RT and HIV PR, are well characterized more than 170 strnctnres of HIV PR and its complexes with varions inhibitors have been solved by protein crystallography techniqnes." " Thns, a dipalmi-toylated derivative of 2,7-naphthalene disulfonic acid demonstrated a micromolar activity for both HFV-l and HIV-2 RT (Figure Symmetrical nature of HIV PR was... 

Sodium 2-(Parasulfo phenylazo)- , 8-dihydroxy- 3,6-naphthalene disulfonate] also called [4, 5 dihydroxy-3-(para-sulfophenylazo)-2, 7-napthalenedisulfonic acid trisodium salt]. 

SPADNS solution Dissolve 958 mg SPADNS, [Sodium 2-(parasul fophenylazo)- , 8-dihydroxy-3, 6-naphthalene disulfonate] in distilled water and dilute to 500 ml. This solution is stable for at least 1 year if protected from direct sunlight. 

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