Scutellarein-7-O-beta-D-glucuronide (SG) and apigenin-7-O-beta-D-glucuronide (AG) are two major bioactive constituents with known pharmacological effects in Erigeron multiradiatus. In this study, a simple method for preparative separation of the two flavone glucuronides was established with macroporous resins. The performance and adsorption characteristics of eight macroporous resins including ...

The dispersion behavior of particles is of great significance in selective flocculation flotation. The interfacial interaction between coal and the main impurity mineral (kaolinite) particles with the effect of an anionic polyacrylamide (PAM A401) was explored by the extended Derjagin–Landau–Verwey–Overbeek (DLVO) theory. The involved surface free energy components of fine mineral particles wer...

The adsorption of benzene and C60 on graphene and boron nitride is studied using density functional theory with the van der Waals density functional (vdW-DF). By comparing these systems we can systematically investigate their adsorption nature and differences between the two functional versions vdW-DF1 and vdW-DF2. The bigger size of the C60 molecule makes it bind stronger to the surface than b...

The advantages of immobilized enzyme over its soluble counterpart arise from their improved stability andeasy separation from the reaction media, leading to decrease in production cost. Immobilization methodsrange from adsorption onto matrices, entrapment, cross-linking and covalent bonding to prefabricatedcarriers or activated supports. Changes in kinetic properties of immobi...

Adsorption of ammonia from anaerobic digester effluent by magnetically modified zeolite (MMZ) has been investigated using a batch technique and comparison of adsorption isotherm equations. Adsorption isotherm models were utilized to describe the equilibrium isotherms and the isotherm constants were calculated. The sorption of ammonia follows Langmuir, Freundlich and Dubinin-Radushkevich (D-R) m...

Simulated moving bed (SMB chemical mixtures. This paper presents an almost plug knowledge about the adsorption properties is the basis to control the position of the adsorption and desorption fronts estimated on-line enabling the compensation of initial parameter discrepancies aging or temperature fluctuation. numerical simulation for two case studies relative to the separation of cyclopentanon...

background activation of stress response during cardiac surgeries such as cardiopulmonary bypass (cpb) can increase myocardial oxygen demand and consumption through induced tachycardia and augmented peripheral vascular resistance. these physiologic consequences may lead to increased morbidity and mortality by putting too great a strain on the already compromised organ systems. material and meth...