Results 291 to 300 of about 152,483 (320)
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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   +3 more
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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
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New methods for quantification of Fenton’s reagent addition based on aged sludge indicators to improve filterability

open access: closed, 2021
Xun Tan   +8 more
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Colored indicators for simple direct titration of magnesium and lithium reagents

Journal of Organometallic Chemistry, 1967
Spencer C. Watson, Jerome F. Eastham
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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 ...
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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
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