scholarly journals Conductivity, Emf, and Spectrophotometric Study on the Participation of Na+and Cl−into Acridine Orange-Poly(α,L-Glutamic Acid) Complex

1976 ◽  
Vol 49 (6) ◽  
pp. 1465-1469 ◽  
Author(s):  
Fumiyuki Watanabe
Keyword(s):  
Glutamic Acid ◽  
Acridine Orange ◽  
Spectrophotometric Study ◽  
Acid Complex

Sorption of α-amino-acids by copper montmorillonite

Clay Minerals ◽  
1967 ◽  
Vol 7 (2) ◽  
pp. 167-176 ◽  
Author(s):  
W. Bodenheimer ◽  
L. Heller
Keyword(s):  
Amino Acids ◽  
Amino Acid ◽  
Complex Formation ◽  
Glutamic Acid ◽  
Acid Complex ◽  
X Ray ◽  
Ray Methods

AbstractSorption of an acidic, amphoteric, sulphur containing and basic α-amino-acid (glutamic acid, glycine, methionine and lysine) by copper montmorillonite was studied by chemical and X-ray methods. With glutamic acid complex formation occurs only in solution but increasing basicity of the aminoacid favours complex formation in the clay interlayers.

Organocation speciation. II. Methylene blue photosensitization as a model for speciation and toxicity of herbicides

1980 ◽  
Vol 58 (6) ◽  
pp. 555-558 ◽  
Author(s):  
Robert D. Guy ◽  
Deoraj R. Narine
Keyword(s):  
Methylene Blue ◽  
Humic Acid ◽  
Binding Sites ◽  
Chemical Speciation ◽  
Spectrophotometric Study ◽  
Biologically Active ◽  
Acid Complex ◽  
True Solution ◽  
Size Separation ◽  
Tryptophan Degradation

A chemical model that employs the photosensitization properties of methylene blue to mimic herbicide toxicity is used to test size separation as a method of chemical speciation. A spectrophotometric study of the dye interactions with the humic colloid indicated that the dye – humic acid complex has a weaker absorption spectrum than the free dye. The absorption spectra suggested that the binding sites on the humic acid are sufficiently isolated to prevent dye–dye interactions on the colloid surface. The dye photosensitization of tryptophan degradation indicated that only the free methylene blue was active in the presence of humic acid, clay, and polystyrene sulphonic acid. The model suggests that if the pollutant must be in true solution to be biologically active then a size separation by dialysis would be a satisfactory speciation procedure.

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