Results 291 to 300 of about 147,811 (320)

Examination of metallochromic indicators and water-soluble reagents for metals by planar electrophoresis

The Analyst, 1986
Water-soluble azo, phthalein, sulphonphthalein and anthraquinone indicators and reagents were subjected to low-voltage electrophoresis on cellulose acetate sheets at pH 2–12. All dyes except low-sulphonated azo dyes yielded one or more sharp bands showing good mobility and resolution over some range of pH values.
Michael A. Leonard, Marie M. Ferris
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Singlet Oxygen in Plants—Its Significance and Possible Detection with Double (Fluorescent and Spin) Indicator Reagents [PDF]

Photochemistry and Photobiology, 2006
ABSTRACTDirect detection of reactive oxygen species (ROS), especially singlet oxygen, in plants under stress conditions is of special importance, not only to identify primary events of oxidative damage, but also in studies exploring the potential role of ROS as signal molecules.
Éva Hideg, Kálmán Hideg, Kozi Asada, Tamás Kálai, Péter B. Kós   +4 more
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Metallofluorescent indicators as spray reagents for the in situ determination of organophosphorus pesticides on thin-layer chromatograms

Analytica Chimica Acta, 1972
Abstract Fluorescence-quenched solutions of palladium(II)-calcein and palladium(II)-calcein blue are shown to be sensitive spray reagents for the detection and in situ determination of organothiophosphorus insecticides on thin-layer chromatograms.
B. Nowlan, Roland W. Frei, T.F. Bidleman
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B. D. H. Universal and ?4.5? indicators as spray reagents for the detection of organic acids

Die Naturwissenschaften, 1956
Kishore Kumar Nair, P. T. Muthe
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2,5-Dimethoxybenzyl alcohol: a convenient self-indicating standard for the determination of organolithium reagents

Journal of the Chemical Society, Chemical Communications, 1980
A method for the determination of organolithium reagent is described using 2,5-dimethoxybenzyl alcohol as a self-indicating primary standard.
Robert C. Ronald, Mark R. Winkle, Janet M. Lansinger   +2 more
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Role of Frontier Molecular Orbital Symmetry of Reagents in Redox Catalytic Indicator Reactions

Journal of Analytical Chemistry, 2005
Some hypotheses are discussed for the nature of “inhibited” or “kinetically hindered” redox reactions, which are employed as indicator reactions in kinetic analytical methods. Some reactions are considered as examples to demonstrate that redox reactions are kinetically hindered because the key frontier orbitals of the reagents differ in their symmetry ...
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A study of a reaction system for organic acid analysis using a pH indicator as post-column reagent

Journal of Chromatography A, 1984
Abstract A post-column reaction system using a pH indicator for organic acid analysis has been studied theoretically with the aid of computer calculation. This examination has revealed that bromothymol blue (BTB) is a most suitable pH indicator for this purpose.
Y. Tanaka, A. Wada, M. Bonoshita, K. Hibi   +3 more
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Densities, Viscosities, and Refractive Indices of Aqueous Alkanolamine Solutions as Potential Carbon Dioxide Removal Reagents

Journal of Chemical & Engineering Data, 2012
To determine the possibility of improvement of the process of CO2 removal by absorption with alkanolamines, densities, viscosities, and refractive indices of four aqueous alkanolamine solutions (water + monoisopropanolamine (MIPA), diisopropanolamine (DIPA), triisopropanolamine (TIPA), or diethanolamine (DEA)) were measured in the temperature range ...
Bojan D. Djordjević, Slobodan P. Šerbanović, Vuk D. Spasojević, Mirjana Lj. Kijevčanin   +3 more
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Simple titration method using diphenyl ditelluride as a colored indicator for the determination of organolithium and organomagnesium reagents

The Journal of Organic Chemistry, 1989
Description et utilisation d'une methode volumetrique de dosage de reactifs ...
Tetsuo Otsubo, Fumio Ogura, Yoshio Aso, Hironori Yamashita   +3 more
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DEVELOPMENT OF AN INDICATOR DISPLACEMENT ASSAY REAGENT FOR SACCHARIDE QUANTITATION

2020
Boronic acid-appended molecules have been popular in classical guest-host interactions with saccharides that use an integrated indicator-receptor motif. Though the literature shows a number of novel sensors varying in degrees of synthetic difficulty and water solubility, such sensor systems were never refined into a working analytical tool. A promising
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