检索结果-南通市图书馆

Chemical Research in Chinese Universities 2011年第6期27卷 944-948页

作者： gao qian wang zhi-zeng wang qian li shan-shan li yu Research Academy of Energy and Environmental Studies North China Electric Power University Beijing 102206 P. R. China

Artificial neural network（ANN） and full factorial design assisted atrazine（AT） multiple regression adsorption model（AT-MRAM） were developed to analyze the adsorption capability of the main components in the surficial sediments（SSs）. Artificial neural network was used to build a model（the determination coefficient square r2 is 0.9977） to describe the process of atrazine adsorption onto SSs, and then to predict responses of the full factorial design. Based on the results of the full factorial design, the interactions of the main components in SSs on AT adsorption were investigated through the analysis of variance（ANOVA）, F-test and t-test. The adsorption capability of the main components in SSs for AT was calculated via a multiple regression adsorption model（MRAM）. The results show that the greatest contribution to the adsorption of AT on a molar basis was attributed to Fe/Mn（–1.993 μmol/mol）. Organic materials（OMs） and Fe oxides in SSs are the important adsorption sites for AT, and the adsorption capabilities are 1.944 and 0.418 μmol/mol, respectively. The interaction among the non-residual components（Fe, Mn oxides and OMs） in SSs interferes in the adsorption of AT that shouldn’t be neglected, revealing the significant contribution of the interaction among non-residual components to controlling the behavior of AT in aquatic environments.

关键词： Back propagation(BP) artificial neural network Full factorial design Fe/Mn oxide Organic material Atrazine Interaction

Effect of Interaction of Non-residual Fractions on Adsorption of Atrazine onto Surficial Sediments and Natural Surface Coating Samples

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2011年第2期27卷 212-216页

作者： li yu li shan-shan gao qian wang Ao Sino-Canada Research Academy of Energy and Environmental Studies North China Electric Power University Beijing 102206 P. R. China Jilin Provincial Center for Sanitary Inspection and Test Changchun 130062 P. R. China College of Environment and Resources Jilin University Changchun 130012 P. R. China

To quantify the effect of the interaction of non-residual fractions[Fe oxides（Fe）, Mn oxide（Mn）, organic materials（OMs）] in the surficial sediments and the natural surface coating samples on the adsorption of atrazine（AT）, an AT multiple regression adsorption model（AT-MRAM） was developed. The AT-MRAM improves upon the previous AT additional adsorption model（AT-AAM） with superior goodness-of-fit test（adjusted R2=ca.1.000）, F-test and t-test（P〈0.01）, and reveals the effect of the interaction among the components in the surficial sediments（SSs） and na- tural surface coatings samples（NSCSs） on the adsorption of AT, which was neglected by the AT-AAM. Meanwhile, the AT-MRAM was also verified through adsorption experiments of AT and the relative deviation between predicted maximum adsorption of AT and the experimental one is less than 15%. The resulted information shows that Mn is prone to interact with other non-residual components, the total maximum adsorption of AT is inversly proportional to the level of Mn, and Fe and OMs facilitate the adsorption of AT. The results also indicate that the adsorption of AT is not only dominated by Fe, OMs, Fe/OMs, but also restrained by Fe/Mn, Fe/Mn/OMs, with lesser roles attributed to Mn, and the estimated AT distributions among the components do not agree with that previously predicted by the AT-AAM, especially with the relative contribution of Mn to the adsorption of AT, revealing significant contribution of the interactions among non-residual components in controlling the behavior of AT in aquatic environments.

关键词： Atrazine Interaction adsorption Mn oxide Surficial sediment Multiple linear regression

Boosting the direct conversion of NH4HCO3 electrolyte to syngas on Ag/Zn zeolitic imidazolate framework derived nitrogen-carbon skeleton

在线全文

学校读者我要写书评

暂无评论

Frontiers of Chemical Science and Engineering 2023年第9期17卷 1196-1207页

作者： Huiyi li Jianmin gao Jingjing shan qian Du yu Zhang Xin Guo Shaohua Wu zhijiang wang Institute of Combustion Engineering School of Energy Science and EngineeringHarbin Institute of TechnologyHarbin150001China MIIT Key Laboratory of Critical Materials Technology for New Energy Conversion and Storage School of Chemistry and Chemical EngineeringHarbin Institute of TechnologyHarbin150001China Harbin Bolier Co. Ltd.Harbin150040China Department of Environmental Engineering Shanxi UniversityTaiyuan030006China

The electrochemical reduction of NH4HCO3 to syngas can bypass the high energy consumption of high-purity CO_(2)release and compression after the ammonia-based CO_(2)capture *** technology has broad prospects in industrial applications and carbon neutrality.A zeolitic imidazolate framework-8 precursor was introduced with different Ag contents via colloid chemical *** material was carbonized at 1000℃to obtain AgZn zeolitic imidazolate framework derived nitrogen carbon catalysts,which were used for the first time for boosting the direct conversion of NH4HCO3 electrolyte to *** AgZn zeolitic imidazolate framework derived nitrogen carbon catalyst with a Ag/Zn ratio of 0.5:1 achieved the highest CO Faradaic efficiency of 52.0%with a current density of 1.15 mA·cm^(−2)at−0.5 V,a H2/CO ratio of 1-2(−0.5 to−0.7 V),and a stable catalytic activity of more than 6 *** activity is comparable to that of the CO_(2)-saturated NH4HCO3 *** highly discrete Ag-N_(x)and Zn-N_(x)nodes may have combined catalytic effects in the catalysts synthesized by appropriate Ag doping and sufficient *** nodes could increase active sites of catalysts,which is conducive to the transport and adsorption of reactant CO_(2)and the stability of*COOH intermediate,thus can improve the selectivity and catalytic activity of CO.

关键词： Ag catalyst zeolitic imidazolate framework CO_(2)electroreduction ammonium bicarbonate electrolyte syngas

Measurement of Atrazine Adsorption onto Surficial Sediments(Natural Surface Coatings)——New Evidence for the Importance of Fe Oxides

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2009年第1期25卷 31-36页

作者： li yu wang Ao gao qian wang Xiao-li Energy and Environmental Research Center North China Electric Power University Beoing 102206 P. R. China College of Environment and Resources Jilin University Changchun 130012 P. R. China Jilin Provincial Center for Sanitary Inspection and Test Changchun 130062 P. R. China

To reveal the relative contribution of the components, Fe, Mn oxides or organic materials（OMs） in the surficial sediments（SSs）, and the natural surface coating samples（NSCSs） to adsorbing atrazine（AT）, a selective chemical extraction technique was employed, to remove the different components, and the adsorption characteristics of AT on the SSs and the NSCSs were investigated. The observed adsorptions of AT on the original and extracted SSs and NSCSs were analyzed by nonlinear least squares fitting（NLSF） to estimate the relative contribution of the components. The results showed that the maximum adsorption of AT on the NSCSs was greater than that in the SSs, before and after extraction treatments, implying that the NSCSs were more dominant than the SSs for organic pollutant adsorption. It was also found that the Fe oxides, OMs, and residues in SSs（NSCSs） facilitated the adsorption of AT, but Mn oxides directly or indirectly restrained the interaction of AT with SSs（NSCSs） particles. The contribution of the Fe oxides to AT adsorption was more than that of OMs; the greatest contribution to AT adsorption on a molar basis was from the Fe oxides in the nonresidual fractions, indicating that the Fe oxides played an important role in controlling the environmental behavior of AT in an aquatic environment.

关键词： Atrazine Adsorption Surficial sediments Natural surface coatings Fe/Mn oxides Organic materials

Membrane-Potential Alteration During K+ Uptake of Different Salt-Tolerant Wheat Varieties

在线全文

学校读者我要写书评

暂无评论

Agricultural Sciences in China 2010年第7期9卷 974-979页

作者： wang yu-qian wang Xiao-li shan yu-hua SHENG Hai-jun FENG Ke Key Laboratory of Crop Genetics and Physiology of Jiangsu Province Yangzhou University Yangzhou 225009 P.R. China School of life Sciences Guizhou Normal University Guiyang 550001 P.R.China

K＋ is the most abundant cation in plant cells and plays an important role in many ways.K＋ uptake of plant has respect to its salt resistant *** are two categories of channel transportation for plants to uptake K＋,one is through K＋ channels and the other is through nonselective cation channels（NSCCs）.The transmembrane localization of K＋ may change membrane potential（MP）.In this paper,three wheat varieties with different salt tolerance were selected and the MP was measured by microelectrode during K＋ *** results showed that the effects of K＋ uptake on MP through K＋ channels or NSCCs were distinct.K＋ influx through K＋ channels led to MP hyperpolarization,while K＋ influx through NSCCs resulted in *** MP alteration of wheat varieties with different salt tolerance was mainly due to NSCCs-mediated K＋ *** with the salt-tolerant wheat,the MP hyperpolarization during K＋ uptake of saltsensitive wheat was much more evident,probably because of the cation outflux through NSCCs during this process.

关键词： wheat K^+ uptake nonselective cation channels (NSCCs) membrane-potential

Peripheral octamethyl-substituted nickel(Ⅱ)-phthalocyanine-decorated carbon-nanotube electrodes for high-performance all-solid-state flexible symmetric supercapacitors

在线全文

学校读者我要写书评

暂无评论

Journal of Energy Chemistry 2023年第1期76卷 214-225,I0006页

作者： yu wang Minzhang li Rajendran Ramachandran Haiquan shan qian Chen Anxin Luo Fei wang Zong-Xiang Xu Department of Chemistry Southern University of Science and TechnologyShenzhen 518055GuangdongChina Guangdong-Hong Kong-Macao Joint Laboratory for Photonic-Thermal-Electrical Energy Materials and Devices Southern University of Science and TechnologyShenzhen 518055GuangdongChina School of Microelectronics Southern University of Science and TechnologyShenzhen 518055GuangdongChina SUSTech Academy for Advanced Interdisciplinary Studies Southern University of Science and TechnologyShenzhen 518055GuangdongChina Engineering Research Center of Integrated Circuits for Next-Generation Communications Ministry of EducationShenzhen 518055GuangdongChina

Construction of advanced electrode materials with unique performance for supercapacitors(SCs)is essential to achieving high implementation in the commercial ***,we report a novel peripheral octamethyl-substituted nickel(Ⅱ)phthalocyanine(Ni Me_(2)Pc)-based nanocomposite as the electrode material of all-solid-state *** highly redox-active NiMe_(2)Pc/carboxylated carbon nanotube(CNTCOOH)dendritic nanocomposite provides rapid electron/electrolyte ion-transport pathways and exhibits excellent structural stability,resulting in high-capacity activity and impressive cycling *** composite prepared with the optimized weight ratio of Ni Me_(2)Pc:CNT-COOH(6:10)showed the highest specific capacitance of 330.5 F g^(-1)at 0.25 A g^(-1).The constructed NiMe_(2)Pc/CNT-COOH-based all-solid-state symmetric SC device showed excellent performance with a maximum energy density of 22.8 Wh kg^(-1)and outstanding cycling stability(111.6%retained after 35,000 cycles).Moreover,flexible carbon cloth significantly enhanced the energy density of the NiMe_(2)Pc/CNT-COOH all-solid-state symmetric device to 52.1 Wh kg^(-1)with 95.4%capacitance retention after 35,000 cycles,and it could be applied to highperformance flexible electronics *** findings provide a novel strategy to design phthalocyanine-based electrode materials for next-generation flexible SC devices.

关键词： Nickel phthalocyanine Carbon nanotubes Nanocomposites Flexible supercapacitors Cycling stability

C-X-C chemokine receptor type 7 antibody enhances neural plasticity after ischemic stroke

在线全文

学校读者我要写书评

暂无评论

Neural Regeneration Research 2023年第9期18卷 1976-1982页

作者： Xiao-qian Zhang Xiao-Yin wang Bing-Chao Dong Mei-Xuan li yu wang Ting Xiao shan-shan Zhao Department of Neurology The First Hospital of China Medical UniversityShenyangLiaoning ProvinceChina Key Laboratory of Immunodermatology Ministry of HealthMinistry of EducationShenyangLiaoning ProvinceChina

Stromal cell-derived factor-1 and its receptor C-X-C chemokine receptor 4(CXCR4) have been shown to regulate neural regeneration after *** r,whether stromal cell-derived factor-1 receptor CXCR7,which is widely distributed in the develo ping and adult central nervous system,participates in neural regeneration remains poorly unde *** this study,we established rat models of focal cerebral ischemia by injecting endothelin-1 into the cerebral co rtex and *** on day 7 after injury,CXCR7-neutralizing antibody was injected into the lateral ventricle using a micro drug delivery system for 6 consecutive *** results showed that CXCR7-neutralizing antibody increased the total length and number of sprouting co rticospinal tra ct fibers in rats with cerebral ischemia,increased the expression of vesicular glutamate transporter 1 and growth-related protein 43,marke rs of the denervated spinal cord synapses,and promoted the differentiation and maturation of oligodendrocyte progenitor cells in the *** addition,CXCR7 antibody increased the expression of CXCR4 in the striatum,increased the protein expression of RAS and ERK1/2 associated with the RAS/ERK signaling pathway,and im proved rat motor *** findings suggest that CXCR7 improved neural functional recovery after ischemic stroke by promoting axonal regeneration,synaptogenesis,and myelin regeneration,which may be achieved by activation of CXCR4 and the RAS/ERK1/2 signaling pathway.

关键词： axonal regeneration cerebral ischemia C-X-C chemokine receptor 4 CXCR7 antibody neural plasticity RAS/ERK pathway remyelination stroke stromal cell-derived factor-1 synaptogenesis

Antibody Phage library Screening Efficiency Measured by KD Values

在线全文

学校读者我要写书评

暂无评论

Chemical Research in Chinese Universities 2005年第6期21卷 677-679页

作者： wang Hui-tang shan. Ya-ming TANG li-li gao li-zeng wang li-ping li Wei li yu-xin College of life Science Jilin University Changchun 130023 P. R. China Institute of Genetics and Cytology Northeast Normal University Changchun 130021 P. R. China

An antibody phage library was screened with two target molecules, IFNα-2a and FGFR-GST, and the KD value of each round of panning was measured. It was found that the apparent KD values decreased along with each additional panning round, which indicates the increase of the binding affinity between the phage and the target molecules. This result shows that the KD value is a reliable intrinsic parameter and a new method for screening efficiency detection is thus provided.

关键词： KD value Antibody phage library Screening efficiency Target

Enhanced thermoelectric performance of n-type TiCoSb halfHeusler by Ta doping and Hf alloying

在线全文

学校读者我要写书评

暂无评论

Rare Metals 2021年第1期40卷 40-47页

作者： Rui-Fang wang shan li Wen-Hua Xue Chen Chen yu-Mei wang Xing-Jun liu qian Zhang School of Materials Science and Engineering Institute of Materials Genome and Big DataHarbin Institute of TechnologyShenzhen 518055China Beijing National Laboratory for Condensed Matter Physics Institute of PhysicsChinese Academy of ScienceBeijing 100190China

The p-type TiCoSb-based half-Heuslers are widely studied due to the good electrical transport properties after hole doping,while the pristine TiCoSb is intrinsically *** is thus desired to obtain a comparable n-type counterpart through optimization of electron *** this work,n-type Ti_(0.9-x)HfxTa_(0.1)CoSb half-Heuslers were fabricated by arc melting,ball milling,and spark plasma *** optimized carrier concentration,together with a decreased lattice thermal conductivity,was obtained by Ta doping at the Ti site,leading to a peak figure of merit(ZT)of 0.7 at 973 K in Ti_(0.9)Ta_(0.1)-*** further alloying Hf at the Ti site,the lattice thermal conductivity was significantly reduced without deteriorating the power *** a result,a peak ZT of 0.9 at 973 K and an average ZT of 0.54 in the temperature range of 300-973 K were achieved in Ti_(0.6)Hf_(0.3)Ti_(0.1)*** work demonstrates that n-type TiCoSb-based halfHeuslers are promising thermoelectric materials.

关键词： Thermoelectric Half-Heusler N-type TiCoSb

Chinese Medicine Meets Conventional Medicine in Targeting COVID-19 Pathophysiology,Complications and Comorbidities

在线全文

学校读者我要写书评

暂无评论

Chinese Journal of Integrative Medicine 2022年第7期28卷 627-635页

作者： wang shan-shan zeng Xian wang Ya-li Zhuoma Dongzhi ZHAO yu-fen CHEN yu-zong qian Xuesen Collaborative Research Center of Astrochemistry and Space life Sciences Institute of Drug Discovery TechnologyNingbo UniversityNingboZhejiang Province 315211China Department of Biological Medicines&shanghai Engineering Research Center of Immunotherapeutics Fudan University School of PharmacyShanghai 201203China Bioinformatics and Drug Design Group Department of PharmacyNational University of Singapore117543Singapore Medical College Tibet UniversityLhasa 850011China Department of Chemical Biology College of Chemistry and Chemical Engineeringand The Key Laboratory for Chemical Biology of Fujian ProvinceXiamen UniversityXiamenFujian Province 361005China Key Laboratory of Bioorganic Phosphorus Chemistry and Chemical Biology(Ministry of Education) Department of ChemistryTsinghua UniversityBeijing 102206China

Objective: To investigate how the National Health Commission of China(NHCC)-recommended Chinese medicines(CMs) modulate the major maladjustments of coronavirus disease 2019(COVID-19),particularly the clinically observed complications and comorbidities. Methods: By focusing on the potent targets in common with the conventional medicines, we investigated the mechanisms of 11 NHCC-recommended CMs in the modulation of the major COVID-19 pathophysiology(hyperinflammations, viral replication), complications(pain, headache) and comorbidities(hypertension, obesity, diabetes). The constituent herbs of these CMs and their chemical ingredients were from the Traditional Chinese Medicine Information Database. The experimentally-determined targets and the activity values of the chemical ingredients of these CMs were from the Natural Product Activity and Species Source Database. The approved and clinical trial drugs against these targets were searched from the Therapeutic Target Database and DrugBank Database. Pathways of the targets was obtained from Kyoto Encyclopedia of Genes and Genomes and additional literature search. Results: Overall,9 CMs modulated 6 targets discovered by the COVID-19 target discovery studies, 8 and 11 CMs modulated 8and 6 targets of the approved or clinical trial drugs for the treatment of the major COVID-19 complications and comorbidities, respectively. Conclusion: The coordinated actions of each NHCC-recommended CM against a few targets of the major COVID-19 pathophysiology, complications and comorbidities, partly have common mechanisms with the conventional medicines.

关键词： COVID-19 Chinese medicine target therapeutic mechanism pathophysiology comorbidity