Search

Summary: The smelting of non‐ferrous metals produces substantial quantities of sulfur dioxide (SO2$$ {}_2 $$)‐laden flue gas, which is seriously harmful to environment and humans. To improve the conversion ratio of SO2$$ {}_2 $$ and minimize environmental pollution, controlling converter inlet temperature during acid production has proven to be an efficient approach. However, unsteadiness of smelting procedure leads to frequent changes in the concentration of SO2$$ {}_2 $$, which affects the catalytic conversion of SO2$$ {}_2 $$ and the production of sulfuric acid. To regulate converter inlet temperature, a proposed method of multi‐model predictive control is introduced. First, working conditions are divided and characterized according to the range of SO2$$ {}_2 $$ concentration. Then, the mathematical model is established for each working condition and the model predictive controller is designed. Finally, an effective switching mechanism is established to realize smooth switching under different working conditions and closed‐loop control of the whole system. Through simulation validation, compared with traditional single‐model predictive controllers and multi‐model PID controllers, the proposed approach demonstrates improved transient performance and steady‐state performance. Simulation outcomes clearly highlight the superiority of the proposed algorithm. [ABSTRACT FROM AUTHOR]

Objective: To establish the HPLC fingerprint of the pieces of honey-fried Radix Glycyrrhizae., Method: Using the reverse-performance liquid chromatography, method was performed on a Hyperclone ODS C18 column (4.6 mm x 250 mm, 5 microm) and acetonitrile-0.1% phosphoric acid was selected as mobile phase gradient elution were adopted., Result: Established HPLC fingerprint of Radix et Rhizoma glycyrrhizae pieces were established, and the results of methodological study met the technical requirements for fingerprinting., Conclusion: The HPLC method is stable, accurate, and reliable to provide a scientific basis of quality control standard for the honey-fried Radix et Rhizoma glycyrrhizae.

Objective: To investigate the isoflavones from the vines of Pueraria lobata., Method: The compounds were isolated by column chromatography over silica gel and RP-C18, and purified by Sephadex LH-20 column chromatography and preparative TLC. The structures were elucidated on the basis of physico-chemical properties and spectral data., Result: Twelve compounds were isolated and identified as: 3'-methoxydaidzein (1), formononetin (2), genistein (3), daidzein (4), daidzin (5), genistin (6), ononin (7), 5-hydroxyl ononin (8), calycosin (9), 6"-O-acetyl genistein (10), 6"-O-acetyl daidzin (11), puerarin (12)., Conclusion: For the first time, compounds 9-11 were isolated from the genus Pueraria plant, and compounds 1, 3, 6-8 were obtained from the vines of this plant.

Objective: To observe the effect of matrine on P170 expressed by multi-drug resistance gene, lung resistant protein (LRP), and boposomeras II., Methods: By the method of less dosage of chemotherapy PFC, the mouse model of multi-drug resistance of S180 tumour cell was set up. At the same time, matrine was administered to the mouse model for 4 weeks, and then P170 LRP, TOPO II were observed by flow cytometry., Results: Martine can obviously reduce the express of P170, LRP and the activity of TOPO II in multi-drug resistance tumour cell induced by chemotherapy., Conclusion: Matrine can intervene the occurrence of the multi-drug resitance of tumor cells induced by chemotherapy.

Objective: To compare the efficiency of montmorillonite (Mengtuoshi) and Smecta., Methods: The effects on the dysentery mice induced by MgSO4, rhubarb powder and castor oil, were observed by given respectively 15.6%, 31.2% Mengtuoshi and 31.2% Smecta. And the effects on the over-contracted rabbit intestines were also observed., Results: Both Mengtuoshi and Smecta could relieve the over pushing speeding of stomach and intestine, and reduce the times of dysentery., Conclusion: The anti-dysentery effect of Mengtuoshi was similar to Smecta from France and may be used as good anti-dysentery drug.