Host-guest complexes of carotenoids with beta-glycyrrhizic acid
Article Abstract:
The structure, stability and reactivity of the host-guest complexes between a set of carotenoids and the triterpene glycoside, beta-glycyrrhizic acid (GA) were investigated by different physicochemical techniques. It was found that carotenoids form 1:2 complexes with GA in aqueous solutions as well as in polar organic solvents and the complexation has a noticeable effect on the reactivity of carotenoids, such as a decrease in the electron-transfer rates, an increase in the lifetime of radical cations in complexes, and a change in the ratio of reaction products.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
User Contributions:
Comment about this article or add new information about this topic:
Complexation of lappaconitine with glycyrrhizic acid: Stability and reactivity studies
Article Abstract:
A two-pronged approach is used to elucidate the stoichimetry and stability of lappoconitine complexes with glycyrrhizic by means of UV and NMR spectroscopy using methods successfully employed to study similar complexes of cyclodextrins. A notable decrease in the rate of the photoinduced electron-transfer reaction between lappaconitine in a complex with glycyrrhizic acid and tyrosine allows the suggestion of an explicit interrelation between the suppressed reactivity of the bound alkaloid and the changes of its theraputic efficiency.
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2005
User Contributions:
Comment about this article or add new information about this topic:
Elementary steps of enzymatic oxidation of nifedipine catalyzed by horseradish peroxidase
Article Abstract:
The elementary steps of the enzymatic oxidation of nifedipine (NF) catalyzed by horseradish peroxidase (HRP) are described based on analysis of kinetic magnetic field effects (MFEs). Results reveal that the first step of the catalytic cycle is single electron transfer resulting in formation of NF. radical cation and ferroperoxidase ([Per.sup.2}).
Publication Name: Journal of Physical Chemistry B
Subject: Chemicals, plastics and rubber industries
ISSN: 1520-6106
Year: 2006
User Contributions:
Comment about this article or add new information about this topic:
- Abstracts: Morphosynthesis of hierarchical hydrozincite with tunable surface architectures and hollow zinc oxide. Novel self-assembled MgO nanosheet and its precursors
- Abstracts: Molecular dynamics studies of the stability of water/n-heptane interfaces with adsorbed naphthenic acids. Molecular dynamics study of the molecular weight dependence of surface tensions of normal alkanes and methyl methacrylate oligomers
- Abstracts: EPR investigation of TiO2 nanoparticles with temperature-dependent properties. Reactivity of anatase TiO2 nanoparticles: The role of the minority (001) surface
- Abstracts: Specific ion effects in solution of globular proteins: Comparison between analytical models and simulation. Ion specific surface forces between membrane surfaces
- Abstracts: Diffusion of lipid-like single-molecule fluorophores in the cell membrane. Probing the sequence of conformationally induced polarity changes in the molecular chaperonin GroEL with fluorescence spectroscopy