The absorption and fluorescence spectra of some basic dyes were measured in the pre­ sence of large excess of adenosine or nucleic acids. The visible absorption band of dye shifts to longer wavelengths than that in free dye solution. The fluorescence spectral shape and peak posi­ tion remain unchanged on the addition of nucleoside or nucleic acid, while the fluorescence inten­ sity is enhanced ...

The 2004 Gibbs thermodynamic potential function of naturally abundant water ice is based on much more experimental data than its predecessors, is therefore significantly more accurate and reliable, and for the first time describes the entire temperature and pressure range of existence of this ice phase. It is expressed in the ITS-90 temperature scale and is consistent with the current scientifi...

A carbon sorbent derived from an agricultural waste, jackfruit peel was applied to study the removal of a basic dye, rhodamine-B from aqueous solution. Batch experiments were performed as a function of process parameters like agitation time, initial dye concentration, temperature, carbon dose and pH. Modified Ritchie second order equation better predicted the kinetic results compared to other r...

Studies of the adsorption of acid dyes of the fluorane series have shown that more of the dye is adsorbed by bacteria under acid conditions than under basic or neutral conditions (Harris, 1949). The amount of dye adsorbed was also found to be related to the ionization of the dye molecule. Since both the bacterial cell and the dye anion carry negative charges, these findings suggest that as the ...

The adsorption of textile dyes by clay was investigated using basic dye (Methylene Blue). Adsorption of dye effluent onto clay samples was carried by batch studies at room temperature, 25oC. The effects of adding clay with zeolite, pH and shaking time towards adsorption performance were investigated. The results from the mixture of 1.0 g clay and 0.01 g zeolite, the increases of pH, pH 9 and th...

The continuous mode-locked dye laser is beginning to assume a role of considerable importance as a tool for the study of ultra fast photochemical and photophysical processes. The purpose of this article is to describe methods of generation of ultra short pulses from argon or krypton ion laser pumped jet-stream dye lasers, some of the pulses properties, and to give examples of applications that ...

In order to see the influence of different variable parameters (initial pH of the solution, Fe++ concentration and H2O2 concentration) and the efficiency to remove Malachite Green dye (Basic Green 4) from aqueous solution, Fenton Oxidation method was employed. Then different parameters were studied using known concentration (150 mg/l) and initial COD (256 mg/l) of prepared dye synthetic solutio...