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3. Front Cover

Author

Zhou, Hailun, primary, Chen, Donghui, additional, Xie, Guifang, additional, Li, Jiaojie, additional, Tang, Jianjia, additional, and Tang, Li, additional

Published
2020
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5. Electrochemical Degradation of Tetracycline Hydrochloride in Aqueous Medium by (B4 C/C)-β-PbO2 Electrode

Author

Chen Donghui, Hu Hongtao, Xie Tingting, and Sun Pengzhe

Subjects
Electrolysis, Chemistry, Inorganic chemistry, 02 engineering and technology, General Chemistry, Electrolyte, 010402 general chemistry, 021001 nanoscience & nanotechnology, Electrochemistry, 01 natural sciences, Glass electrode, 0104 chemical sciences, law.invention, Corrosion, law, Electrode, Cyclic voltammetry, 0210 nano-technology, Polarization (electrochemistry)
Abstract

(B4C/C)-β-PbO2 electrodes were prepared by high-pressure molding technique and characterized by X-ray diffraction, scanning electron microscopy, polarization curves, cyclic voltammetry curves, and corrosion resistance test. In this paper, the effects of initial concentration, current density, electrolyte concentration, pH, and electrode spacing on tetracycline hydrochloride (TCH) degradation were investigated. Results indicated that modified electrode had high electrochemical activities, high oxygen evolution potential, and excellent corrosion resistance. The maximum removal rate of TCH could reach 90.87% at initial concentration of 300 mg/L after 120 min electrolysis with Na2SO4 concentration of 0.2 mol/L, electrode spacing of 1 cm, current density of 30 mA/cm2, and pH 3. Pseudo-first-order kinetics equation was followed during electrocatalytic degradation of TCH with 20%(B4C/C)-β-PbO2 electrode.

Published
2017

10. A novel method to extract vanadium and chromium from vanadium slag using molten NaOH-NaNO3binary system

Author

Hao Du, Shaona Wang, Yi Zhang, Shili Zheng, Lanjie Li, Chen Donghui, and Biao Liu

Subjects
Environmental Engineering, Materials science, General Chemical Engineering, Inorganic chemistry, Vanadium, chemistry.chemical_element, Activation energy, Oxygen, Chromium, chemistry, Binary system, Leaching (metallurgy), Molten salt, Dissolution, Biotechnology
Abstract

A new method using NaOH-NaNO3 binary melts to treat vanadium slag is proposed. Vanadium and chromium can be simultaneously extracted in the leaching processes. Under the optimum reaction conditions, the recovery of vanadium and chromium can reach 93.7% and 88.2% in 6 h, respectively. The kinetics investigation indicates that the decomposition of vanadium slag is controlled by mass transfer in product layer. During the reaction, NaOH is believed to provide basic media and facilitate the dissolution of acidic oxides. NaNO3 decomposes to produce a large amount of active oxygen species, such as O, O-2(2-),and O2-. NaOH intensifies the decomposition of NaNO3 to NaNO2, but inhibits further decomposition of NaNO2. NaNO3 can be regenerated by oxidation of NaNO2 using oxygen at high temperature. The apparent activation energy of NaNO2 oxidation in the temperature ranging from 350 to 450 degrees C is 105.5 kJ/mol. (C) 2012 American Institute of Chemical Engineers AIChE J, 59: 541-552, 2013

Published
2012

11. Functional modulation of satellite cells in long-term denervated human laryngeal muscle

Author

Chen Shicai, Liu Fei, Wang Wei, jing jianjun, chen gang, Zheng Hong-liang, and Chen Donghui

Subjects
Denervation, Pathology, medicine.medical_specialty, Muscle Denervation, business.industry, Myogenesis, musculoskeletal system, MyoD, Endocrinology, Otorhinolaryngology, Internal medicine, Laryngeal Muscle, Myosin, Myogenic regulatory factors, medicine, business, tissues, Myogenin
Abstract

Objectives/Hypothesis: To evaluate the effects of long-term denervation on satellite cells (SCs) as myogenic stem cells in human posterior cricoarytenoid (PCA) muscle. Study Design: Histological investigation of SCs and quantitative assessment of myoD and myogenin, which are two key myogenic regulatory factors. Methods: According to the course of denervation, denervated PCA muscles of 58 patients who suffered from traumatic unilateral vocal cord paralysis were divided into four groups: group A (6–12 months, 15 cases), group B (13–24 months, 17 cases), group C (25–36 months, 14 cases), and group D (more than 36 months, 12 cases). Normal PCA muscles (12 cases) were used as a control group. Immunofluorescence labeling was used to visualize the SCs. Transcription and protein expression levels of myoD and myogenin were assessed using real-time quantitative polymerase chain reaction and Western blots, respectively. Results: MyoD- and myogenin-positive cells and embryonic myosin heavy chain-positive myofibers were detected in group A and most of the samples of group B. Transcription levels of myoD and myogenin were highly upregulated in groups A and B, whereas groups C and D showed no significant difference as compared to control. Protein expression levels of myoD and myogenin peaked in group A, which was significantly different than group B. In contrast, no expression was observed in the other groups. Conclusions: Activated SCs contribute to regenerative myogenesis in denervated laryngeal muscles through compensatory mechanisms. Laryngeal muscles exhibit persistent regenerative potential from the viewpoint of muscle SCs after less than 2 years of denervation. Laryngoscope, 2010

Published
2009

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