You Yuru

Kinetic and thermodynamic studies of sulforaphane adsorption on macroporous resin.

The adsorption equilibrium, kinetic and thermodynamic of sulforaphane (SF) adsorption onto macroporous resin in aqueous phase were studied. The SP850 resin was screened as the appropriate resin for SF purification. From the equilibrium studies, the Redlich-Peterson model was found to be the best for description of the adsorption behavior of SF onto SP850 resin, followed by the Freundlich model and the Langmuir model. Batch equilibrium experiments demonstrated that, in the examined temperature range, the equilibrium adsorption capacity of SP850 resin decreased with increasing adsorption temperature. Thermodynamics studies indicated that the adsorption of SF was a physical, exothermic, and spontaneous process. The adsorption kinetics revealed that the pseudo-second-order kinetic model was suitable to characterize the kinetics of adsorption of SF onto SP850. Finally, the intra-particle diffusion model demonstrated that SF diffused quickly into macropores, and that diffusion slowed down in the meso- and micropores.

Mensurating quantum of the γ-aminobutyric acid in mulberry leaf and brown rice by paper chromatography

γ-aminobutyric acid, which can improve the memory function, was founded in the various agricultural products. Developing functional food which contains rich γ-aminobutyric acid can provide an important resource for exploitation of agricultural products. Stabilized system paper chromatography, γ-aminobutyric acid contents in mulberry leaves and brown rice were studied in this article. The result showed that 100g dry mulberry leaves contain 207.8mg γ-aminobutyric acid, 100g dry brown rice contain 2.06mg γ-aminobutyric acid, 100g dry and germinated brown rice contain13.25mg, which is 6 times than unmalted brown rice. It laid the foundation of the enrichment and functional food development of the γ-aminobutyric acid.