Gas chromatography-mass spectrometry based metabolic profiling for the identification of discrimination markers of Angelicae Radix and its application to gas chromatography-flame ionization detector system

Gas chromatography (GC)-based metabolomics technologies were applied for quality control of Angelicae Radix, an herbal medicine commonly used in Japan and China. Since Angelica roots are priced and graded differently based on their species and cultivation area, there is a need for a simple and reproducible method to discriminate Angelica roots. Here, we used GC-MS profiling data to construct a discrimination method for species and cultivation area of A. Radix. Seventy-six primary metabolites were identified. The quality factors of A. Radix were successfully classified using metabolic profiling and the orthogonal projections to latent structures-discriminant analysis (OPLS-DA) technique. Sorbitol and a glucose/4-aminobutyric acid combination were chosen as bio-markers from S-plot of OPLS-DA. Application of these selected bio-markers to a more practical and cost-efficient system, namely gas chromatography-flame ionization detector (GC-FID) system were also assessed. As a result, the same separations of sorbitol, glucose and 4-aminobutyric acid in box plots were obtained from GC-FID data. Our results demonstrate that GC-based metabolic markers can be readily applied for the establishment of a practical quality control method for A. Radix.     

Enhanced hydrogen production from biomass via the sulfur redox cycle under hydrothermal conditions

A new method of hydrogen production from biomass via a sulfur redox cycle at moderate temperatures has been proposed. This method, which can utilize excess sulfur from hydrocarbon refining processes and waste or geothermal heat, consists of two half cycles: (1) hydrogen production from an aqueous alkaline solution at subcritical conditions of water, where sulfide, HS⁻ and S²⁻, acts as a reducing agent of water, and (2) sulfide regeneration under much milder conditions, with an organic compound derived from biomass acting as a reducing agent of polysulfide, S_n²⁻, and sulfur oxyanion, S_xO_y²⁻, formed in the first half cycle. During a 60-min reaction of an aqueous sodium sulfide solution, hydrogen production was observed at ≥280 °C and corresponding saturated vapor pressures. Addition of D-glucose, C₆H₁₂O₆, to the solution after hydrogen production at 300 °C resulted in sulfide regeneration at temperatures ≥60 °C in the present 10-min reaction. Moreover, hydrogen production from glucose via the sulfur redox cycle was demonstrated, where the hydrogen production and sulfide regeneration were conducted at 300 °C and 105 °C, respectively. Results indicated that hydrogen production from 1 mol glucose was greater than that by hydrothermal gasification of glucose at much higher temperatures up to 500 °C.     

肉制品绿色制造——低钠干腌肉制品研究进展

干腌肉制品因其具有独特的色泽、风味和口感等感官特性而深受广大消费者的喜爱。然而传统干腌肉制品的钠盐（氯化钠）含量过高,人体摄入过高的钠盐会对健康产生不良影响。本文讨论了食盐对干腌肉制品风味、质构和微生物安全的影响,概述了低钠干腌肉制品的相关研究动态,并对低钠干腌肉制品绿色制造的未来研究（如低钠复合盐）提出展望。     

Effects of Ni–TiO2 Pillared Clay–Montmorillonite Composites for Photocatalytic Enhancement Against Reactive Orange Under Visible Light

Journal of Inorganic and Organometallic Polymers and Materials - In this study, a composite material based on Ni–TiO2 Pillared Clay-Montmorillonite (Ni–TiO2/CMMT) was synthesized using...