Changes in the visible absorption spectra of dyes due to binding with polyelectrolytes of high molecular weight are known as metachromasy and have been extensively studied. Recent advances in metachromasy have been summarized in several reviews (1-3). It is also known that metachromasy due to binding with proteins is generally weak but oc curs with both acidic and basic dyes. Methyl orange (MO)...

The correlation of the basophilia of tissues with their nucleic acid content is one of the oldest and most widely applied chemical interpretations of histological staining reactions. The interaction of basic dyes with tissue constituents has been regarded for a long time, and without explicit qualification, as a salt formation. This interpretation was based essentially on the observation of sto...

A series of structurally simple yet highly tunable organoboron luminophores was designed and synthesized. The solid-state fluorescence quantum yields exhibit nearly exponential growth by decorating the luminophore with additional sterically demanding substituents. Uniquely, the luminescence of these organoboron dyes can be easily switched on/off by acidic/basic vapors, yielding a solid-state fl...

synthetic dyes are among the most common contaminants of the environment. therefore, the aim of this study was investigation the removal of basic blue 41 (bb41) and methylene blue (mb) from industrial effluents by useing raw and modified rice stems. in this study raw and modified rice stems treated chemically with citric acid (ca) and were used to explore the potentiality of rice stems for remo...

The use of periodic acid oxidation followed by treatment with Schiff's reagent as a method for staining polysaccharides was first reported briefly by McManus (1946) and later in some detail by Hotchkiss (1948). Hotchkiss did not find the procedure particularly satisfactory for bacteria, but considered that it worked very well with many other polysaccharide materials. Despite the poor results re...

Methods to determine viability of taeniid oncospheres following treatments with potential lethality have practical application in efforts to control transmission. Here we investigated several methods, in lieu of infectivity studies, to assess oncosphere viability and determine lethal temperature treatment regimens. In the first experiment, a standard treatment to exshell oncospheres with 0.5% h...

toxicity of certain dyestuffs to the conidia of Fusarium culmorurm. Ann. Appl. Biol., 31, 221-231. FISCHER, E. 1957 Relation between chemical structure and bacteriostatic action in diand triphenylmethane dyes. Arzneimittel-Forsch., 7, 192-194, 306-307. In Chem, Abstr., 61, 9942, 13069. GOLDACRE, R. J. AND PHILLIPS, J. N. 1949 The ionization of basic triphenylmethane dyes. J. Chem. Soc., 1949, 1...