Results 271 to 280 of about 153,076 (312)

False positive results in class-specific rheumatoid factor (RF) assays due to interaction between RF and Fc fragments of anti-immunoglobulin indicator reagents

Journal of Immunological Methods, 1983
A recently developed, simple immunological method, diffusion-in-gel ELISA, has been adapted for class-specific determination of rheumatoid factor (RF). Evidence was obtained of an analytical error due to interaction between RF and antigenic determinants on the Fc part of the indicator immunoglobulin (Ig) molecules used. This was eliminated by replacing
A, Tarkowski, L M, Bjursten, L A, Nilsson, H, Nygren   +3 more
openaire   +2 more sources

The arsenazo 2-(2-arsenophenyl)azo-7-(4-antipyril)azo-1,8-dihydroxy-3,6-naphthalenedisulphonic acid as spectrophotometric reagent and metallochromic indicator for calcium

Collection of Czechoslovak Chemical Communications, 1986
Ions Ca(II) react with the arsenazo [2-(2-arsenophenyl)azo-7-(4-antipyril)azo-1,8-dihydroxy-3,6-naphthalenedisulphonic acid] at pH 10.0 to produce a blue-violet complex with the maximum of absorbance at 578 nm. Its stoichiometry is 1 : 1 and its stability constant has the value of 8.56 . 104 at pH 10.0.
J. Cacho, A. L. Molinero, E. Pinilla
openaire   +1 more source

The Use of Baye's Theorem and Other Indices of Agreement in Evaluating the Use of Reagent Strips in Screening Rural Schoolchildren for Schistosoma Haematobium in Zambia

International Journal of Epidemiology, 1988
The diagnosis of Schistosoma haematobium disease on the basis of history and physical examination alone is often difficult. Tests have thus been developed to allow an early and more accurate diagnosis. However these tests have substantial imperfections and many different results obtained from these tests must be integrated into a diagnostic conclusion ...
openaire   +2 more sources

o-Aminobenzenethiol: an oxidimetric indicator for hydrogen ion and reagent for metals

Analytica Chimica Acta, 1965
H.E. Affsprung, R.E. Mitchell
openaire   +1 more source

Solochrome Red B as a metallochromic indicator for iron and as a chromophoric reagent for thorium

Fresenius' Zeitschrift f�r Analytische Chemie, 1974
H. Khalifa, B. N. Barsoom, M. Abou Dan
openaire   +1 more source

B. D. H. Universal and ?4.5? indicators as spray reagents for the detection of organic acids

Die Naturwissenschaften, 1956
K. K. Nair, P. T. Muthe
openaire   +1 more source

Characterization and application of FerroZine iron reagent as a ferrous iron indicator

Analytical Chemistry, 1976
openaire   +1 more source

Reactions of Allylmagnesium Reagents with Carbonyl Compounds and Compounds with C═N Double Bonds: Their Diastereoselectivities Generally Cannot Be Analyzed Using the Felkin–Anh and Chelation-Control Models

Chemical Reviews, 2020
Nicole D Bartolo, Jacquelyne A Read, Elizabeth M Valentín   +2 more
exaly  

1‐(2‐Quinolylazo)‐2‐phenanthrol (QAP) as a spectrophotometric reagent and as an indicator for the determination of cobalt(II)

Journal für Praktische Chemie, 1972
R. N. Virmani, B. S. Garg, R. P. Singh
openaire   +1 more source

Electrophilic Trifluoromethylation by Use of Hypervalent Iodine Reagents

Chemical Reviews, 2015
Julie Charpentier, Antonio Togni
exaly