Schiff bases of 5'-deoxypyridoxal with n-hexylamine in water-dioxane mixtures: influence of polarity of the medium on the catalysis of formation
✍ Scribed by Miguel A. Vazquez; Josefa Donoso; Francisco Muñoz; Francisco García Blanco; M.Angeles Garcia Del Vado; Gerardo Echevarria
- Publisher
- Elsevier Science
- Year
- 1990
- Weight
- 590 KB
- Volume
- 59
- Category
- Article
- ISSN
- 0304-5102
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We have carried out a kinetic study of the 4-pyridinecarboxaldehyde plus n-hexy-Iamine system, at 25T, in water-dioxan mixtures (0-608 v/v) and in the pH range pK, + 1.5 > pH > pK, -1.5, where pK, is the pK value of the conjugate acid of the amine. The results obtained could be interpreted in terms
## Abstract The acidity constants of twofold protonated guanosine 5′‐diphosphate, H~2~(GDP)^−^, and the stability constants of the [Cu(H;GDP)] and [Cu(GDP)]^−^ complexes were determined in H~2~O as well as in 30 or 50% (__v__/__v__) 1,4‐dioxane/H~2~O by potentiometric pH titrations (25°; __I__=0.1M
## Synopsis The preferential binding of solvent components with a nonionic homopolypeptide, poly(N5-(3-hydroxypropyl)-~-glutamine), ([Gln((CH2)30H)],), has been determined in water/dioxane mixtures using differential refractometry. The degree of preferential binding was calculated from the differe