2-naphthalene sulfonic acid, 7-Amino

EFFECT OF AMINO NAPHTHALENE SULFONIC ACID NATURE ON THE STRUCTURE AND PHYSICAL PROPERTIES OF THEIR COPOLYMERS WITH ANILINE... 

Effect of Amino Naphthalene Sulfonic Acid Nature... 

SCHEME 1 Chemical stmcture of amino naphthalene sulfonic acids... 

Z. Wei and M. Wan, Synthesis and characterization of self-doped poly(aniline-co-amino-naphthalene sulfonic acid) nanotubes, J. Appl. Polym. Set, 87, 1297-1301 (2003). 

Anti-HIV agents N-acyl amino-naphthalene sulfonic acid derivatives... 

Amino-3-hydroxy-7-nitro-l-naphthalene-sulfonic acid [6259-63-8]... 

Heterocycles are known to have O—S, S—N, and O—N bonds. The cyclization of peri-hydroxy and peri-amino-substituted naphthalene sulfonic acids gives rise to 1,8-naphthosultone 246 and 1,8-naphthosultam 247, respectively (33MI2 63MI1). On gas phase photolysis of naphtho[/>c]-... 

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. 

Naphthalene Sulfonic Acid as a Reagent for Amino Acids. J. biol. 

Mahmoud, M.E. Soayed, A.A. Hafez, O J. Selective sohd phase extraction and pre-concentration of heavy metals from seawater by physicahy and chemicahy immobilized 4-amino-3-hydroxy-2-(2-chlorobenzene)-azo-l-naphthalene sulfonic acid silica gel. Microchim. Acta 2003,143 (1), 165. 

Barium lithol toner n. Barium salt of 2-amino-1-naphthalene sulfonic acid coupled to 2-naphthol. 

On adding a solution of the magnesium salt of 8-amino-1-naphthalene sulfonic acid (I) to a solution containing sodium ions, a crystalline precipitate is formed which is usually dark grey in color. 

Investigations of chemically prepared oligomers with said type of substitution resulted in ESR spectra with hyperfine structure indicative of polaronic triplet di(cation) radicals. These results bear importance with respect to the development of organic ferromagnetic substances. Ferromagnetic behavior also was found by Mi-zobuchi et al. [437] with various experimental techniques applied to a copolymer of aniline and 5-amino-2-naphthalene sulfonic acid prepared by electropolymerization... 

Flash rusting is the phenomenon of formation of small brown rust spots that appear very soon after application of waterbased systems directly to steel. The problem is more prominent when the steel surface is active (for example, after blasting) and the pH is <7. To combat this problem, flash-rust inhibitors are added to waterbased coatings. They should have good water solubility. Flat surfaces are relatively easy to protect, while weld areas are considered difficult. Flash-rust inhibition at a weld area can be achieved by a combination of different products. Flash-rust inhibitors are typically based on ammonium and sodium nitrites, benzoates, metaborates and phosphates, occasionally in combination with materials such as morpholine and amino methyl propanol. Some other organic salts are also used, such as amine salts of 2-mercaptobenzothiazolyl succinic acid and calcium or barium salts of linear alkyl naphthalene sulfonic acids. Typically they are used at levels of 0.1 to 1.0 % of the total mass of paint. They also help in preventing in-can corrosion upon storage of aqueous paint. 

Fluorescence detectors are based on filter-fluorimeters or spectrofluori-meters. They are more selective and can be up to three orders of magnitude more sensitive than UV absorbance detectors. The detector responds selectively to naturally fluorescing solutes such as polynuclear aromatics, quinolines, steroids and alkaloids, and to fluorescing derivatives of amines, amino acids and phenols with fluorogenic reagents such as dansyl chloride (5-(dimethylamino)-l-naphthalene sulfonic acid). 

The term coupling component referred originally to aromatic hydrocarbons, particularly benzene and naphthalene derivatives, which were required to have a hydroxy or an amino group as a substituent (sometimes, but not necessarily, accompanied by other substituents such as sulfonic acid groups). The presence of the hydroxy or amino group increases the C-nucleophilicity of the coupling component. In most cases this is a necessary requirement because the diazo components are relatively weak electrophiles. If the coupling component is phenol or a derivative of phenol ... 

Proteases are enzymes that break peptide bonds in proteins. As such they lend themselves to a variety of homogeneous assay techniques. Most employ labeling both ends of the substrate with a different tag, and looking for the appearance (disappearance) of the signal generated in the intact substrate (product). As an example, for a fluorescence quench assay, the N-terminal of a peptide is labeled with DNP and the C-terminal with MCA. As such, the peptide is fluorescently silent since the fluorescence from DNP is quenched by absorption by the MCA. Another very popular donor/acceptor pair is EDANS 5-[(2-aminoethyl)amino] naphthalene-1-sulfonic acid and DABCYL 4-(4-dimethylaminophenylazo)benzoic acid) (a sulfonyl derivative (DABSYL) [27], Upon peptide cleavage, the two products diffuse, and due to a lack of proximity, the fluorescence increases. 

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