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Chinese Journal of Chemical Engineering 2024年第3期67卷 78-88页

作者： Ming Zhou Mengrong Wu Haiwei Yu xiangjun Zheng Kuan Shen Xingmei Guo Yuanjun Liu Fu Cao Hongxing Gu Qinghong Kong Junhao zhang School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Jiangsu Hengshen Co. LtdZhenjiang 212314China School of the Environment and Safety Engineering Jiangsu UniversityZhenjiang 212013China

To address the low conductivity and easy agglomeration of transition metal sulfide nanoparticles,FeCoS_(4) nanoparticles embedded in S-doped hollow carbon(FeCoS_(4)@S-HC)composites were successfully fabricated through a combination of hydrothermal processes and sulfidation *** unique bowlshaped FeCoS_(4)/S-HC composites exhibit excellent structural stability with a high specific surface area of 303.7 m^(2)·g^(-1) and a pore volume of 0.93 cm^(3)·g^(-1).When applied as anode material for lithium-ion batteries,the FeCoS_(4)@S-HC anode exhibits efficient lithium storage with high reversible specific capacity(970.2 mA·h·g^(-1) at 100 mA·g^(-1))and enhanced cycling stability(574 mA·h·g^(-1) at 0.2 A·g^(-1) after 350 cycles,a capacity retention of 84%).The excellent lithium storage is attributed to the fact that the bimetallic FeCoS_(4) nanoparticles with abundant active sites can accelerate the electrochemical reaction kinetics,and the bowl-shaped S-HC structure can provide a stable mechanical structure to suppress volume expansion.

关键词： Bimetallic sulfides Bowl-shaped hollow carbon S doping Buffering volume expand Lithium-ion batteries

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论国际法上的正义如何可能

学术界 2007年第2期 262-269页

作者：张相君厦门大学法学院福建厦门361005

作为“软法”的国际法,是否能够成为运送正义的有效渠道,一直颇受质疑和争论。近年来,美国的单边主义又再次强烈地冲击了国际法上的正义图景。道德是正义的来源和支撑。在国内法中,法律和道德紧密相关,并有国家保证正义德性的实现;在国... 详细信息

作为“软法”的国际法,是否能够成为运送正义的有效渠道,一直颇受质疑和争论。近年来,美国的单边主义又再次强烈地冲击了国际法上的正义图景。道德是正义的来源和支撑。在国内法中,法律和道德紧密相关,并有国家保证正义德性的实现;在国际法中,法律和道德松散无涉,国家以利益为行动指南,先天缺乏道德上的行为能力。在国家利益中心主义的单维度思考模式下,正义图景的实现可望而不可及。但是,国家间的共同根本性利益可以铸就国际社会的共同道德底线。对道德底线的维护,就是对国际法上不正义的消灭,如此,可以在现有的条件下接近正义。

关键词：正义道德国家利益中心主义

Reviving chloroquine for anti-SARS-CoV-2 treatment with cucurbit[7]uril-based supramolecular formulation

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Chinese Chemical Letters 2021年第10期32卷 3019-3022页

作者： Cheryl H.T.Kwong Jingfang Mu Shengke Li Yaohui Fang Qianyun Liu xiangjun zhang Hiotong Kam Simon M.Y.Lee Yu Chen Fei Deng Xi Zhou Ruibing Wang State Key Laboratory of Quality Research in Chinese Medicine Institute of Chinese Medical SciencesUniversity of MacaoMacao 999078China State Key Laboratory of Virology Wuhan Institute of VirologyCenter for Biosafety Mega-ScienceChinese Academy of Sciences(CAS)Wuhan 430071China State Key Laboratory of Virology College of Life SciencesWuhan UniversityWuhan 430072China

The wide-spreading SARS-CoV-2 virus has put the world into boiling water for more than a year,however pharmacological therapies to act effectively against coronavirus disease 2019(COVID-19)remain ***(CQ),an antimalarial drug,was found to exhibit promising antiviral activity in vitro and in vivo at a high dosage,thus CQ was approved by the FDA for the emergency use authorization(EUA)in the fight against COVID-19 in the US,but later was revoked the EUA status due to the severe clinical ***,we show that supramolecular formulation of CQ by a macrocyclic host,curcurbit[7]uril(CB[7]),reduced its non-specific toxicity and improved its antiviral activity against coronavirus,working in synergy with CB[7].CB[7]was found to form 1:1 host-guest complexes with CQ,with a binding constant of$104 L/*** CQ-CB[7]formulation decreased the cytotoxicity of CQ against Vero E6 and L-02 cell *** particular,the cytotoxicity of CQ(60 mmol/L)against both Vero E6 cell line and L-02 cell lines was completely inhibited in the presence of 300 mmol/L and 600 mmol/L CB[7],***,the CB[7]alone showed astonishing antiviral activity in SARS-CoV-2 infected Vero E6 cells and mouse hepatitis virus strain A59(MHV-A59)infected N2 A cells,and synergistically improved the antiviral activity of CQ-CB[7],suggesting that CB[7]-based CQ formulation has a great potential as a safe and effective antiviral agent against SARS-CoV-2 and other coronavirus.

关键词： Host-guest Chloroquine Cucurbituril SARS-CoV-2 COVID-19

Celastrol regulates the oligomeric state and chaperone activity of αB-crystallin linked with protein homeostasis in the lens

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Fundamental Research 2024年第2期4卷 394-400页

作者： Huaxia Wang Qing Tian Ying zhang Yibo Xi Lidan Hu Ke Yao Jingyuan Li xiangjun Chen Eye Center of the Second Affiliated Hospital Zhejiang University School of Medicine88 Jiefang RoadHangzhou 310009China Institute of Translational Medicine Zhejiang University School of Medicine268 Kaixuan RoadHangzhou 310020China. State Key Laboratory of Membrane Biology School of Life SciencesTsinghua UniversityBeijing 100084China The Children’s Hospital Zhejiang University School of MedicineNational Clinical Research Center for Child HealthHangzhou 310052China Zhejiang Province Key Laboratory of Quantum Technology and Device Department of PhysicsZhejiang UniversityZheda Road 38Hangzhou 310027China

Protein misfolding and aggregation are crucial pathogenic factors for cataracts,which are the leading cause of visual impairment worldwide.α-crystallin,as a small molecular chaperone,is involved in preventing protein misfolding and maintaining lens *** chaperone activity of α-crystallin depends on its oligomeric *** previous work identified a natural compound,celastrol,which could regulate the oligomeric state of α*** this work,based on the UNcle and SEC analysis,we found that celastrol induced𝛼αB-crystallin to form large *** oligomer formation enhanced the chaperone activity of αB-crystallin and prevented aggregation of the cataract-causing mutant α*** interactions between𝛼αB-crystallin and celastrol were detected by the FRET(Fluorescence Resonance Energy Transfer)technique,and verified by molecular *** least 9 binding patterns were recognized,and some binding sites covered the groove structure of α***,αB-R120G,a cataract-causing mutation located at the groove structure,and celastrol can decrease the aggregates of α***,our results suggested celastrol not only promoted the formation of large αB-crystallin oligomers,which enhanced its chaperone activity,but also bound to the groove structure of its α-crystallin domain to maintain its structural *** might serve as a chemical and pharmacological chaperone for cataract treatment.

关键词： αB-crystallin Celastrol Interactions Oligomeric state Chaperone activity Structural stability

F127 assisted fabrication of Ge/r GO/CNTs nanocomposites with three-dimensional network structure for efficient lithium storage

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Chinese Chemical Letters 2024年第9期35卷 447-451页

作者： Hui Gu Mingyue Gao Kuan Shen Tianli zhang Junhao zhang xiangjun Zheng Xingmei Guo Yuanjun Liu Fu Cao Hongxing Gu Qinghong Kong Shenglin Xiong School of Environmental and Chemical Engineering Jiangsu University of Science and TechnologyZhenjiang 212003China Key Laboratory of the Colloid and Interface Chemistry Ministry of EducationSchool of Chemistry and Chemical EngineeringShandong UniversityJi’nan 250100China Jiangsu Hengshen Co. Ltd.Zhenjiang 212314China School of the Environment and Safety engineering Jiangsu UniversityZhenjiang 212013China

To solve the volume expansion and poor electrical conductivity of germanium-based anode materials,Ge/rGO/CNTs nanocomposites with three-dimensional network structure are fabricated through the dispersion of polyethylene-polypropylene glycol(F127)and reduction of *** interesting phenomenon is discovered that F127 can break GeO_(2)polycrystalline microparticles into 100 nm nanoparticles by only physical interaction,which promotes the uniform dispersion of GeO_(2)in a carbon network structure composed of graphene(rGO)and carbon nanotubes(CNTs).As evaluated as anode material of Lithium-ion batteries,Ge/rGO/CNTs nanocomposites exhibit excellent lithium storage *** initial specific capacity is high to 1549.7 mAh/g at 0.2 A/g,and the reversible capacity still retains972.4 mAh/g after 100 *** improved lithium storage performance is attributed to that Ge nanoparticles can effectively slow down the volume expansion during charge and discharge processes,and threedimensional carbon networks can improve electrical conductivity and accelerate lithium-ion transfer of anode materials.

关键词： F127 assisted fabrication Ge/rGO/CNTs nanocomposites Three-dimensional carbon network Lithium-ion batteries Cycle stability

Cu/HZSM-5催化剂低温NH_(3)-SCR脱硝性能研究

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炼油技术与工程 2022年第2期52卷 55-59页

作者：张相俊中国石油化工股份有限公司济南分公司山东省济南市250100

采用浸渍法制备Cu(x)/HZSM-5系列催化剂并应用于低温NH_(3)选择性催化还原脱硝性能研究。在固定床微型反应器上进行了O_(2)存在条件下催化剂的NH_(3)选择性催化还原NO活性评价,并通过XRD(X射线衍射仪),SEM(扫描电子显微镜),NO-TPD(程序... 详细信息

采用浸渍法制备Cu(x)/HZSM-5系列催化剂并应用于低温NH_(3)选择性催化还原脱硝性能研究。在固定床微型反应器上进行了O_(2)存在条件下催化剂的NH_(3)选择性催化还原NO活性评价,并通过XRD(X射线衍射仪),SEM(扫描电子显微镜),NO-TPD(程序升温脱附),O_(2)-TPD,TG-DSC-MS(热重-差示扫描量热法-质谱联用)等对催化剂性能进行表征。结果表明,催化剂的催化脱硝活性随着Cu负载量增加而逐渐增强,Cu负载量影响催化剂表面活性物种分布、氧化还原性能和吸附脱附性能,Cu以CuO的形式存在于催化剂表面或空隙中。Cu(6)/HZSM-5表现出较好的低温脱硝性能,与其拥有较好的氧化性能和NO吸附脱附性能等有关,159~378℃时NO的转化率接近100%。

关键词： Cu/HZSM-5催化剂低温 NH_(3)-SCR 脱硝吸附和脱附特性氧化性热重差热活性

GEOCHEMICAL CHARACTERISTICS OF INTERSTITIAL WATER OF THE BOHAI GULF

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Acta Oceanologica Sinica 1985年第2期4卷 222-231页

作者：廖先贵张湘君 Second Institute of Oceanography National Bureau of Oceanography Hangzhou

This paper discusses the geochemical characteristics of the interstitial water of the Bohai Gulf, where the main salt contents (K+, Na+, Ca++ Mg+ + , C1-, HCO3-, SO4-) in 55 sedimentary layers of 13 cores (3-4 m in length) and those of bottom seawater have been determined and the exchange capacity and exchange cations (K+, Na+, Ca++, Mg++) of the layers analysed (see Fig. 1)Fig. J. The stations of core samplings in the Bohai Gult.

关键词： Ca CI GEOCHEMICAL CHARACTERISTICS OF INTERSTITIAL WATER OF THE BOHAI GULF

热处理对甲醇氧化催化剂Nb_(2)O_(5)·nH_(2)O-Pt/C的影响

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稀有金属材料与工程 2011年第9期40卷 1683-1687页

作者：李伟伟张向军卢世刚北京有色金属研究总院北京100088

采用沉淀法制备甲醇氧化电催化剂10%Nb2O5·nH2O-20%Pt/C,并在Ar气氛下对它进行热处理。用XRD和HRTEM研究热处理对10%Nb2O5·nH2O-20%Pt/C结构和形貌的影响,用循环伏安法和计时电流法研究热处理对10%Nb2O5·nH2O-20%Pt/C电化学性能的影... 详细信息

采用沉淀法制备甲醇氧化电催化剂10%Nb2O5·nH2O-20%Pt/C,并在Ar气氛下对它进行热处理。用XRD和HRTEM研究热处理对10%Nb2O5·nH2O-20%Pt/C结构和形貌的影响,用循环伏安法和计时电流法研究热处理对10%Nb2O5·nH2O-20%Pt/C电化学性能的影响。结果表明:随着热处理温度的升高,催化剂Pt尺寸增大、活性提高;与无热处理的20%Pt/C相比较,700℃热处理的10%Nb2O5·nH2O-20%Pt/C对甲醇的催化氧化性能最好,它对甲醇氧化的起始电位降低了150mV,对甲醇的氧化峰电流提高了2.48倍。

关键词：热处理甲醇电催化剂 Nb_(2)O_(5)·nH_(2)O-Pt/C

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基于支持向量机的交互检验储层预测

石油物探 2018年第4期57卷 597-600页

作者：张向君张晔大庆钻探工程公司物探研究院黑龙江大庆163357 东北石油大学黑龙江大庆163318

基于统计学习理论的支持向量机(support vector machine,SVM)是有限样本情况下的机器学习方法,具有严格的理论基础,能较好地解决小样本、非线性、高维数和局部极小点等问题。在地震储层预测中,影响支持向量机应用效果的主要因素在于惩... 详细信息

基于统计学习理论的支持向量机(support vector machine,SVM)是有限样本情况下的机器学习方法,具有严格的理论基础,能较好地解决小样本、非线性、高维数和局部极小点等问题。在地震储层预测中,影响支持向量机应用效果的主要因素在于惩罚因子及核函数参数的设置,其值设置过小或过大,都会使估计函数的泛化能力变差,降低储层预测精度。为提高支持向量机在储层预测中的应用效果,将已知样本随机划分为若干组,依次选其中的一组作为检验样本,其余样本作为学习样本,交互检验惩罚因子及核函数参数对储层预测精度的影响;优选惩罚因子及核函数参数,提高支持向量机储层预测精度。通过实际资料应用,验证了方法的有效性。

关键词：芰持向量机机器学习惩罚因子核函数储层预测

Spectral moment estimates of broadband backscattering acoustic wave in moving medium

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Chinese Journal of Acoustics 1996年第2期15卷 106-114页

作者： ZHU Weiqing WANG Changhong PAN Feng and zhang xiangjun(Institute of Acoustics, Academia Sinica, Beijing 100080)

In this paper, the signal and noise of broadband moving medium reverberation are supposed to be colored complex Gaussian processes. When the sample number is large, both the mean and variance of the first power spectral moment estimator by covariance techniques are obtained. The results obtained by D. S. ZRNIC[8], where the noise is assumed to be white,are generalized The transmitted signal is pseudo noise (PN) train and consists of two same subtrains between which the difference is only a time delay. In order to simplify the analysis,the center frequency and frequency bandwidth of both signal and noise are also assumed to be equal. It is shown that the mean of the first power spectral moment estimate is an unbiased estimate and that the variance of this estimate is dependent on (1) the correlation coefficient ρ between two subtrains, (2) the signal-to-noise ratio S/N and (3) △fTL, where △f, T and L are the frequency bandwidth, time duration and total number of pulse elements in a subtrain respectively. Three thousand groups of narrow-band-signal data obtained in field are *** the range of ρ is determined. All these results are very useful in desiglling a broadballd acoustic Doppler current profiler (BBADCP).

关键词： Spectral Backscattering Moving medium Broad band