Henan University of Technology

About: Henan University of Technology is a education organization based out in Zhengzhou, China. It is known for research contribution in the topics: Catalysis & Starch. The organization has 7648 authors who have published 6503 publications receiving 73067 citations. The organization is also known as: Hénán Gōngyè Dàxué.

Ginsenoside Re: Its chemistry, metabolism and pharmacokinetics

Abstract: Ginsenosides, the bioactive components of ginseng, can be divided into two major groups, namely 20(S)-protopanaxatriol (e.g. Re, Rg1, Rg2, and Rb3) and 20(S)-protopanaxadiol (e.g. Rb1, Rb2, Rc, and Rd). Biological and environmental factors may affect the content of ginsenosides in different parts of ginseng plant. Evidence from pharmacokinetic and metabolic studies of Re demonstrated that (1) the absorption of Re is fast in gastrointestinal tract; (2) Re may be metabolized mainly to Rh1 and F1 by intestinal microflora before absorption into blood; and (3) Re is quickly cleared from the body.

Controlled Release System by Active Gelatin Film Incorporated with β-Cyclodextrin-Thymol Inclusion Complexes

Abstract: Essential oils such as thymol are added to food packaging film to obtain active films with antimicrobial and antioxidant properties. However, thymol is insoluble in water, and release rate of thymol is usually too fast. Therefore, a need exists to increase thymol solubility and to deliver thymol in a controlled manner from film matrix to food surface. In this study, spray dried inclusion complexes of β-cyclodextrin/thymol (1:1 molar ratio) was incorporated into gelatin solution to obtain active gelatin films. Both inclusion complexes and active films showed sustained release of thymol. Physical properties and thymol release kinetics were evaluated for active films. For gelatin films with 8.25% (mass ratio) inclusion complexes, complete thymol release took 235 h, compared with 38 h for thymol release from inclusion complexes. The diffusion coefficient reached 2.04 × 10−15 m2 s−1.

A novel nonenzymatic H2O2 sensor based on cobalt hexacyanoferrate nanoparticles and graphene composite modified electrode

Abstract: A nanocomposite of cobalt hexacyanoferrate nanoparticles (CoHCFNPs) and graphene was synthesized by using a facile precipitation method. As a kind of modified electrode materials, CoHCFNPs/graphene nanocomposite was used to fabricate a nonenzymatic H2O2 sensor. Several techniques, such as Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), atomic force microscopy (AFM) and inductive coupled plasma emission spectrometry (ICP) and electrochemistry, were performed to characterize the modified electrode. Experimental results demonstrated that the prepared sensor exhibited intensive electrocatalytic activity toward the oxidation of H2O2. Under the optimum conditions, the proposed nonenzymatic sensor can be applied to the detection of H2O2 with a wide linear range of 0.6–379.5 μM and a low detection limit of 0.1 μM.