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114693

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关键词:'114693'
显示 1-18 共 18 条结果 关于 "114693" 范围 论文
J A Knight et al.
Clinical chemistry, 29(11), 1969-1971 (1983-11-01)
1-Nitroso-2-naphthol reacts with various 5-hydroxyindoles as well as para-substituted phenols and guaiacols. Consequently, this reaction has long been used to measure tyrosine in tyrosinosis and tyrosinemia, homovanillic acid in neuroblastoma, and 5-hydroxy-3-indoleacetic acid in the carcinoid tumor. We report here
Improved fluorometric determination of acetaminophen and its conjugates with 1-nitroso-2-naphthol in whole blood and urine.
J Shibasaki et al.
Chemical & pharmaceutical bulletin, 30(1), 358-361 (1982-01-01)
Fluorometric measurement of tyrosine in serum and plasma.
J A Ambrose
Clinical chemistry, 20(4), 505-510 (1974-04-01)
N Schnell et al.
European journal of biochemistry, 200(2), 487-493 (1991-09-01)
o-Phenanthroline (1,10-phenanthroline) is a chemical known to chelate iron and other transition metal ions. This compound was added to solid yeast media to reduce the concentration of biologically available iron. Other essential divalent cations, like Zn2+ or Cu2+, which could
Mohamed E Mahmoud et al.
Journal of hazardous materials, 173(1-3), 349-357 (2009-09-18)
The potential removal and preconcentration of lead (II), copper (II), chromium (III) and iron (III) from wastewaters were investigated and explored. Three new alumina adsorbents of acidic, neutral and basic nature (I-III) were synthesized via physical adsorption and surface loading
Yingxue Ye et al.
Talanta, 57(5), 945-951 (2008-10-31)
The suitability of 1-nitroso-2-naphthol (NN) as a complexing agent for on-line preconcentration of cobalt using C(18) microcolumn with FI-FAAS system has been tested. Various parameters affecting the complex formation and its elution were optimized. Reagent solution (2.5x10(-3) mol l(-1)) and
A Rothstein
American journal of clinical pathology, 87(5), 644-648 (1987-05-01)
Determination of urinary homovanillic acid (HVA) is an important analysis to establish the diagnosis and prognosis of neuroblastoma. A method is presented for the determination of this metabolite of dopamine using its reaction with 1-nitroso-2-naphthol and nitrous acid. The method
Improved quantitation for urinary 5-hydroxyindole acetate using the nitrosonaphthol reaction.
L M Muller et al.
Clinical biochemistry, 17(1), 37-38 (1984-02-01)
[A modified method of determination of bound 5-hydroxyindoleacetic acid in the urine].
N G Shafranova et al.
Laboratornoe delo, (7)(7), 25-26 (1983-01-01)
Nayyef Aljaar et al.
The Journal of organic chemistry, 78(1), 154-166 (2012-11-28)
Reactions between 1-nitroso-2-naphthols and α-functionalized ketones such as α-bromo-, α-chloro-, α-mesyloxy-, α-tosyloxy-, and α-hydroxy ketones under basic conditions delivered 2-substituted naphtho[1,2-d][1,3]oxazoles in a single synthetic operation. The product formation was accompanied by the unexpected loss of the C═O group from
N-acetyl-L-cysteine: an alternative to 2-mercaptoethanol in the reduction of Udenfriend's chromophore used for the determination of urinary 5-hydroxyindoleacetic acid.
M Zouheir Habbal
Clinica chimica acta; international journal of clinical chemistry, 130(2), 251-256 (1983-05-30)
K G Bhansali et al.
Journal of pharmaceutical sciences, 76(8), 654-657 (1987-08-01)
The compound 1,2-benzo-8-(2-aminoethyl)-3-phenoxazone (1) is synthesized by reacting tyramine with 1-nitroso-2-naphthol in the presence of nitric acid. During the reaction, tyramine and 1-nitroso-2-naphthol undergo condensation, ring closure, and subsequent oxidation steps to form 1. Compound 1 is characterized by one-
C A Georgiou et al.
The Analyst, 115(3), 309-313 (1990-03-01)
The reaction of para- and meta-substituted phenols with 1-nitroso-2-naphthol in the presence of either CeIV or PbIV as an oxidant has been used to develop a fast automated flow injection (Fl) method. A stopped-flow kinetic study of the reaction revealed
N Takahashi et al.
Free radical research communications, 4(6), 351-358 (1988-01-01)
The nonenzymatic reduction of nitrosobenzene (I), 2-nitroso-1-naphthol (II) and 2-nitroso-1-naphthol-4-sulfonic acid (III) with reducing agents such as NADPH, L-cysteine and N-acetyl-L-cysteine led to the formation of the corresponding hydronitroxide radicals, as confirmed with ESR spectroscopy. In addition to these radicals
Jeffrey A Hawkes et al.
Analytica chimica acta, 766, 53-60 (2013-02-23)
Here we demonstrate the use of reverse titration - competitive ligand exchange-adsorptive cathodic stripping voltammetry (RT-CLE-ACSV) for the analysis of iron (Fe) binding ligands in seawater. In contrast to the forward titration, which examines excess ligands in solution, RT-CLE-ACSV examines
P S Draganac et al.
Clinical chemistry, 26(7), 910-912 (1980-06-01)
A "high-performance" liquid-chromatographic procedure for 5-hydroxy-3-indoleacetic acid is described and compared with a colorimetric method in which 1-nitroso-2-naphthol is used. The analyte and an internal standard, p-nitrobenzoic acid, were extracted into diethyl ether from urine at pH 4.0 (acidified with
C F Burrows et al.
Journal of the American Veterinary Medical Association, 183(3), 318-322 (1983-08-01)
The nitrosonapthol test, which qualitatively measures urinary excretion of 4-hydroxyphenylacetic acid and related compounds, was evaluated as a screening test for small intestinal disease in 60 dogs with chronic diarrhea. Test results were positive in 8 of 13 dogs with
V Leskovac et al.
The International journal of biochemistry, 25(2), 279-286 (1993-02-01)
1. The endogenous, NADPH-supported production of H2O2 and of O2-.-radicals in liver microsomes, was very strongly enhanced in the presence of 1-nitroso-2-naphthol. 2. A 30-fold induction by NON was the consequence of its direct reduction to NON-radicals, catalyzed by microsomal
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