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Impedance Characterization of the Film Formation Process at the Graphite Anodes

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Chinese Chemical Letters 2000年第10期11卷 915-918页

作者： Bo Hua DENG Yong fang LI Hua quan YANG Center for Molecular Science Institute of ChemistryChinese Academy of SciencesBeijing 100080 Department of Chemistry Peking UniversityBeijing 100875

In this paper, the formation mechanism of the passive SEI film at the natural graphite anodes was investigated with tilt: electrochemical impedance spectroscopy (EIS). A characteristic semicircle was observed in the lower frequency range of the EIS spectrum for the irreversible charge process (lithium intercalation) at ca. 0.75V, 0.40V and 0.20V.

关键词： electrochemical impedance spectroscopy surface film graphite anodes Li-ion battery

The Genomic Characterization of Enterovirus D68 from 2011 to 2015 in Beijing, China

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Biomedical and Environmental Sciences 2016年第9期29卷 675-677页

作者： ZHANG Tie Gang LI Hong quan LI Ai Hua CHEN Meng GONG Cheng LUO Ming DONG mei HUANG fang Beijing Center for Disease Prevention and Control Beijing 100013 China

A retrospective surveillance study on enterovirus D68 was performed in Beijing, China, following the largest and most widespread EV-D68 infection, which occurred in the USA. From January 2011 to July 2015, EV-D68 was identified in 12 individuals with respiratory infections in Beijing, China. The phylogenetic relationships based on the genomic sequence alignment showed that there were two lineages circulating in Beijing from 2011 to 2015. Eight EV-D68 strains belonged to group 1 and four belonged to group 3. All EV-D68 strains from Beijing in 2014 were separately clustered into subgroup II of group 1. Based on these results, we concluded that the Beijing EV-D68 strains had little association with the EV-D68 strains circulating in the 2014 USA outbreak.

关键词： The Genomic Characterization of Enterovirus D68 from 2011 to 2015 in Beijing,China EV

Effect of surface modification of activated carbon on its adsorption capacity for NH_3

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Journal of China University of Mining and Technology 2008年第2期18卷 261-265,274页

作者： SHAN Xiao-mei ZHU Shu-quan ZHANG Wen-hui School of Chemical and Environmental Engineering China University of Mining ＆ Technology Beijing 100083 China Beijing Research Institute of Coal Chemistry Beijing 100013 China

To investigate the effects of carbon surface characteristics on NH3 adsorption,coal-based and coconut shell activated carbons were modified by treatment with *** surface properties of the carbons were characterized by low temperature nitrogen sorption,by Boehm's titrations and by XPS ***3 adsorption isotherms of the original and the modified carbons were *** results show that the carbons were oxidized by HNO3 and(NH4)2S2O8,and that there was an increase in oxygen containing functional groups on the ***,the pore-size distribution of the coal-based carbons was changed after KMnO4 *** was found that the NH3 adsorption capacity of the modified carbons was enhanced and that the most pronounced enhancement results from(NH4)2S2O8 *** our experimental conditions,the capacity is positively cor- rected to the number of surface functional groups containing oxygen,and to the number of ***,an empirical model of the relationship between NH3 adsorption and multiple factors on the carbon surface was fit using a complex regression method.

关键词： activated carbon surface modification ammonia adsorption

Development of a topical ointment of betamethasone dipropionate loaded nanostructured lipid carrier

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Asian Journal of Pharmaceutical Sciences 2016年第2期11卷 248-254页

作者： Xin Kong Yuan Zhao Peng quan Liang fang Department of Pharmaceutical Sciences Shenyang Pharmaceutical University

The purpose of this study was to design an innovative topical ointment containing betamethasone dipropionate loaded nanostructured lipid carrier (BD-NLC) for the treatment of atopic dermatitis (AD). BD-loaded NLC was produced with precirol ATO 5 and oleic oil (OA) by melt emulsification method. Effects of surfactant concentration, amount of solid lipid and liquid lipid on skin retention and skin penetration were investigated by in vitro percutaneous permeation experiment. The optimized BD-NLC showed a homogeneous particle size of 169.1 nm (with PI = 0.195), negatively charged surface (-23.4 mV) and high encapsulation efficiency (85%). Particle morphology assessed by TEM revealed a spherical shape. In vitro skin permeation study was carried out to investigate the percutaneous behaviors of W/O ointment with BD-NLC and Carbopol emulgel ointment with BD-NLC. W/O ointment with BDNLC showed high skin retention (35.43 μg/g) and low penetration (0.87 μg/ml). In vitro drug release studies were carried out to demonstrate the drug releasing properties of the two ointments. W/O ointment with BD-NLC showed an advantage for skin retention as it was better for drug release. The tissue distribution test suggested that BD distribution was skin > muscle > blood. Self-made topical ointment in mice showed no skin irritation. The animal experiments indicated that BD-loaded NLC ointment was effective and safe for topical use.

关键词： Nanostructured lipid carrier(NLC) Betamethasone dipropionate(BD) Topical ointment Atopic dermatitis(AD)

Assay of Histamine in Single Mast Cells by Capillary Zone Electrophoresis with Electrochemical Detection

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Chinese Chemical Letters 2002年第10期13卷 982-984页

作者： Qian Feng WENG fang quan XIA Wen Rui JIN School of Chemistry and Chemical Engineering Shandong UniversityJinan 250100

Capillary zone electrophoresis was employed for the analysis of histamine in single rat peritoneal mast cells using an amperometric detector. In this method, individual mast cells and then 0.02 mol/L NaOH as a lysing solution are injected into the front end of the separation capillary. A cell injector was constructed for easy injection of single cells. Histamine in single mast cells has been identified and quantified.

关键词： Capillary electrophoresis electrochemical detection histamine mast cell.

Adaptive Backstepping Sliding Mode Control of Uncertain Semi-Strict Nonlinear Systems and Application to Permanent Magnet Synchronous Motor

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Journal of Systems Science & Complexity 2021年第2期34卷 552-571页

作者： WANG fang WANG Jian-mei WANG Kun ZONG Qun HUA Changchun School of Science Yanshan UniversityQinhuangdao 066004China School of Electrical and Information Engineering Tianjin UniversityTianjin 300072China School of Electrical and Engineering Yanshan UniversityQinhuangdao 066004China

A disturbance observer(DOB)based-backstepping sliding mode control scheme is discussed for a class of semi-strict nonlinear system with unknown parameters and mismatched ***,adaptive technique and DOB are respectively applied to tackle the unknown parameters and mismatched uncertainty,where the DOB can effectively alleviate the chattering problem of sliding mode control(SMC).Then,exponential sliding mode surface is proposed to improve the convergence rate of the sliding mode ***‘explosion of complexity’problem inherent in conventional backstepping control is overcome by designing the novel first-order *** stability of the closed-loop system is analyzed in the framework of Lyapunov stability theory,in which the tracking error converges to an arbitrarily small neighborhood around zero(ASNZ).At last,two examples are given to illustrate the effectiveness of the proposed control strategy.

关键词： Adaptive law DOB filter semi-strict nonlinear system SMC

Delay-dependent Robust H∞ Control for Uncertain Singular Systems with State Delay

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自动化学报 2009年第1期35卷 65-70页

作者： fang mei Business School Ningbo City College of Vocational Technology Ningbo 315000 P.R. China

这份报纸讨论延期依赖者的问题为有州的延期的不明确的单个系统的柔韧的 H 控制。把途径基于线性矩阵不平等(LMI ) ，我们设计一个州的反馈控制器，它保证为所有可被考虑的无常，结果的靠近环的系统是常规的，推动与 H 免费、稳定的标... 详细信息

这份报纸讨论延期依赖者的问题为有州的延期的不明确的单个系统的柔韧的 H 控制。把途径基于线性矩阵不平等(LMI ) ，我们设计一个州的反馈控制器，它保证为所有可被考虑的无常，结果的靠近环的系统是常规的，推动与 H 免费、稳定的标准界限限制。所有获得的结果是延期依赖者并且由不包含系统矩阵的分解的严格的 LMI 提出。数字例子证明建议方法不比存在的保守。

关键词：奇数时间延误系统延迟依赖自动控制线性平均直径

Ubiquitination in diabetes and its complications:A perspective from bibliometrics

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World Journal of Diabetes 2025年第1期16卷 187-203页

作者： Li-Yuan Xiong Wei Zhao Fa-quan Hu Xue-mei Zhou Yu-Jiao Zheng College of Traditional Chinese Medicine Anhui University of Chinese MedicineHefei 230012Anhui ProvinceChina

BACKGROUND Diabetes has a substantial impact on public health,highlighting the need for novel ***,an intracellular protein modification process,is emerging as a promising strategy for regulating pathological *** hypothesize that ubiquitination plays a critical role in the development and progression of diabetes and its complications,and that understanding these mechanisms can lead to new therapeutic *** To uncover the research trends and advances in diabetes ubiquitination and its complications,we conducted a bibliometric *** Studies on ubiquitination in diabetes mellitus and its complications were retrieved from the Web of Science Core *** mapping analysis was conducted using the CiteSpace *** We gathered 791 articles published over the past 23 years,focusing on ubiquitination in diabetes and its associated *** articles originated from 54 countries and 386 institutions,with China as the leading *** Jiao Tong University has the highest number of publications in this *** most prominent authors contributing to this research area include Wei-Hua Zhang,with Zhang Y being the most frequently cited ***,The Journal of Biological Chemistry is noted as the most cited in this *** predominant keywords included expression,activation,oxidative stress,phosphorylation,ubiquitination,degradation,and insulin *** The role of ubiquitination in diabetes and its complications,such as diabetic nephropathy and cardiomyopathy,is a key research ***,these areas require further investigations.

关键词： Diabetes mellitus Ubiquitination Bibliometric analysis CiteSpace Research trends

Simulataneous analysis of reactivity of anilines in the hydro gen-isotope exchange reaction

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Nuclear Science and Techniques 2005年第6期16卷 352-357页

作者： ZHAO Dong-Yu IMAIZUMI Hiroshi LEI Qing-quan ZHAO Dong-mei School of Chemistry and Materials Science Heilongjiang University Harbin 150080 China College of Electrical and Electronic Engineering Harbin University of Science and Technology Harbin 150040 China Department of Chemistry and Chemical Engineering Faculty of Engineering Niigata University Niigata-shi 950-2181 Japan

In order to reveal the reactivity of a functional group in an aromatic compound having two substituents inthe aromatic ring, the hydrogen-isotope exchange reaction (T-H exchange reaction) between tritiated water vapor(HTO vapor) and 4-amino-2-methylbenzenesulfonic acid (and 5-amino-2-methylphenol) were dynamically observedat 50 (and 70 ) in a gas ℃ ℃ -solid system. Consequently, the fact that the specific activity of the acid increased withtime was obtained, and the T-for-H exchange reaction occurred. By applying the A"-McKay plot method to the dataobserved, the rate constant of each functional group for the reaction was obtained. After the additive property of theHammett’s rule was applied to this work, the new substituent constants were obtained. From the above-mentioned,the following four items have been confirmed: (1) the reactivity of the functional groups can be dynamically analyzed,and the A"-McKay plot method is useful to analyze the reactivity; (2) the additive property of the Hammett’s rule isapplicable to quantitative comparison of the reactivity of the functional groups; (3) the reactivity of the functionalgroups can be simultaneously analyzed by using the A"-McKay plot method in the T-H exchange reaction; and (4) themethod used in this work is also useful for analyzing the reactivity of a certain material having some kinds of functional groups.

关键词：放射性同位素芳胺交换反应环境污染