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Unimodal productivity-biodiversity relationship along the gradient of multidimensional resources across Chinese grasslands

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National Science Review 2022年第12期9卷 90-103页

作者： Yanfen Wang Jianqing Du Zhe Pang Yali Liu Kai Xue Yann Hautier Biao Zhang Li Tang Lili Jiang Baoming Ji Xingliang Xu Jing Zhang Ronghai Hu Shutong zhou Fang Wang Rongxiao Che Di Wang chaoting zhou Xiaoyong Cui Nico Eisenhauer Yanbin Hao College of Resources and Environment University of Chinese Academy of Sciences State Key Laboratory of Tibetan Plateau Earth System Environment and Resources Chinese Academy of Sciences Beijing Yanshan Earth Critical Zone National Research Station University of Chinese Academy of Sciences School of Grassland Science Beijing Forestry University Ecology and Biodiversity Group Department of BiologyUtrecht University Key Laboratory of Ecosystem Network Observation and Modeling Institute of Geographic Sciences and Natural Resources Research Chinese Academy of Sciences College of Life Sciences University of Chinese Academy of Sciences School of Ecology and Environmental Sciences Yunnan University Institute of Biophysics Chinese Academy of Sciences Department of Medicine New York University Grossman School of Medicine Beijing Yanshan Earth Critical Zone National Research Station University of Chinese Academy of Sciences College of Life Sciences University of Chinese Academy of Sciences German Centre for Integrative Biodiversity Research (iDiv) Institute of Biology Leipzig University

Resources can affect plant productivity and biodiversity simultaneously and thus are key drivers of their relationships in addition to plant-plant ***,most previous studies only focused on a single resource while negle cting the nature of resource *** we integrated four essential resources for plant growth into a single metric of resource diversity(RD) to investigate its effects on the productivity-biodiversity relationship(PBR) across Chinese *** showed that habitats differing in RD have different PBRs—positive in low-resource habitats,but neutral in medium-and high-resource ones—while collectively,a weak positive PBR was observe ***,when excluding direct effects of RD on productivity and biodiversity,the PBR in high-resource habitats became negative,which leads to a unimodal instead of a positive PBR along the RD *** integrating resource effects and changing plant-plant interactions into a unified framework with the RD gradient,our work contributes to uncovering underlying me chanisms for inconsistent PBRs at large scales.

关键词： productivity–biodiversity relationship resource diversity plant strategies grassland

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金融发展对经常项目失衡影响的实证研究

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吉林金融研究 2014年第9期 9-13,39页

作者：周超婷浙江工商大学金融学院浙江杭州310000

本文主要从金融发展的视角研究了其与经常项目失衡的关系,并通过42个国家1995-2011年的数据为样本,对其进行实证分析,发现金融发展水平对经常账户余额有显著的负作用,回归结果表明,发达国家的金融发展水平较高,金融市场较完善,其经常项... 详细信息

本文主要从金融发展的视角研究了其与经常项目失衡的关系,并通过42个国家1995-2011年的数据为样本,对其进行实证分析,发现金融发展水平对经常账户余额有显著的负作用,回归结果表明,发达国家的金融发展水平较高,金融市场较完善,其经常项目更容易发生逆差,在发展中国家,提高金融发展水平,会使经常项目顺差减少。解决经常账户失衡问题,必须从根本上缩小各国金融发展水平差异,发展和创新发展中国家的资本市场,完善金融市场,缓解居民消费的流动性约束问题。

关键词：金融发展经常项目失衡

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双硫仑/铜诱导肝癌细胞铁死亡的作用机制

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江苏医药 2023年第4期49卷 330-333,F0003页

作者：周超婷敬强安张萍吴韵怡任雪营王莹饶国武童向民浙江工业大学药学院浙江杭州310014 浙江省人民医院临床医学研究所浙江省新华医院医学检验科杭州市第一人民医院GCP机构办公室

目的探讨双硫仑/铜(DSF/Cu)诱导肝癌细胞铁死亡的作用机制。方法采用DSF/Cu 0、0.5、1.0、1.5、2.0和4.0μmol/L处理人肝癌细胞株Huh7,CCK-8法检测细胞活力,激光共聚焦显微镜观察细胞内脂质过氧化物和谷胱甘肽(GSH)水平的变化,流式细... 详细信息

目的探讨双硫仑/铜(DSF/Cu)诱导肝癌细胞铁死亡的作用机制。方法采用DSF/Cu 0、0.5、1.0、1.5、2.0和4.0μmol/L处理人肝癌细胞株Huh7,CCK-8法检测细胞活力,激光共聚焦显微镜观察细胞内脂质过氧化物和谷胱甘肽(GSH)水平的变化,流式细胞术检测细胞内活性氧(ROS)水平,Western blot和实时荧光定量PCR检测铁死亡相关基因谷胱甘肽过氧化物酶4(GPX4)的蛋白和mRNA表达。结果随着DSF/Cu浓度的升高,细胞活力逐渐降低(P<0.05)。与DSF/Cu 0μmol/L比较,DSF/Cu处理细胞后,脂质过氧化物积累,细胞内ROS水平升高。与DSF/Cu 0μmol/L比较,DSF/Cu 2.0μmol/L能够下调细胞GPX4蛋白和mRNA的表达(P<0.05),降低细胞GSH水平(P<0.05)。铁死亡抑制剂去铁胺能够部分恢复DSF/Cu抑制的细胞活力(P<0.05)。结论 DSF/Cu可抑制肝癌细胞活力,并通过抑制GPX4表达来诱导肝癌细胞发生铁死亡。

关键词：双硫仑铜谷胱甘肽过氧化物酶4 肝细胞癌铁死亡

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Optimization of Fuel In-Situ Reduction(FISR)Denitrification Technology for Cement Kiln using CFD Method

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Journal of Thermal Science 2023年第6期32卷 2256-2272页

作者： SHI chaoting CAI Jun REN Qiangqiang WU Huixing Institute of Engineering Thermophysics Chinese Academy of SciencesBeijing100190China University of Chinese Academy of Sciences Beijing100049China Dalian National Laboratory for Clean Energy Dalian116023China

Nitrogen oxides(NO_(x))from cement industry have drawn more and more attention and the existing denitrification technologies can hardly meet the increasingly stringent emission requirements in *** our previous work,fuel in-situ reduction(FISR)method was proposed to cut cement NO_(x)*** the pilot-scale precalciner in the previous experiment as objection,optimization of FISR method was conducted using CFD *** results demonstrated that NO_(x)emission decreased by 69.86%after adopting FISR *** effects of initial concentrations of NO and O_(2)in kiln gas,feeding location of the first-stage tertiary(tertiary air-I)and cement raw meal(CRM)were further *** increasing initial NO concentration,NO_(x)emission increased linearly,while the reduction rate of NO in kiln gas maintained above 80%.When O_(2)content in kiln gas is more than 4%,oxygen would more significantly promote the formation of NO_(x)and inhibit the reduction of *** dimensionless locations of tertiary air-I and CRM were *** simulation results showed that the optimal dimensionless locations are 0.6 and 1.6 for tertiary air-I and CRM,*** outputs achieved in this study will provide a strong support for the practical application of FISR method in cement industry.

关键词： cement industry precalciner pretreated fuel NO_(x)emission denitrification

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Oxidation of diclofenac by permanganate: Kinetics, products and effect of inorganic reductants

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Chinese Chemical Letters 2023年第4期34卷 378-383页

作者： Run Huang chaoting Guan Qin Guo Zhen Wang Hanping Pan Jin Jiang Key Laboratory for City Cluster Environmental Safety and Green Development of the Ministry of Education School of EcologyEnvironment and ResourcesGuangdong University of TechnologyGuangzhou 510006China Southern Marine Science and Engineering Guangdong Laboratory(Guangzhou) Guangzhou 511458China

The large consumption and discharge of diclofenac(DCF) lead to its frequent detection in surface water and groundwater, posing great threats to humans and ecosystems. This study explored the oxidation kinetics of DCF by permanganate(Mn(Ⅶ)), and expounded the underlying reason for the unusual p Hdependency that was unclear in previous studies. The kinetics of DCF analogues(i.e., aromatic secondary amines) by Mn(Ⅶ) oxidation were comparatively investigated. Then, a tentative kinetic model involving the formation of an intermediate between Mn(Ⅶ) and DCF or its analogues was proposed to fit the p H-rate profile. Since DCF contained two chloro groups, and a carboxyl group which could be ionized by negative electrospray ionization, a precursor ionization scanning approach was used for the first time for detection of N-containing chlorinated oxidation products. New degradation pathways of DCF containing ring opening, carboxylation, carbonylation, electrophilic addition, hydroxylation and dehydrogenation were proposed based on the identified oxidation products. Moreover, it was demonstrated that the introduction of various reducing agents such as Mn(Ⅱ), Fe(Ⅱ) and bisulfite significantly improved the oxidation kinetics of DCF by Mn(Ⅶ). The positive effects of Mn(Ⅱ) and Fe(Ⅱ) were mainly attributed to the accelerated formation of MnO_(2)that acted as a catalyst or co-oxidizer contributing to DCF degradation. The presence of bisulfite caused two-stage kinetics, where a sharp drop of DCF concentration followed by a slowdown of DCF removal. In the first stage, potent reactive manganese species(e.g., Mn(Ⅲ), Mn(V), and Mn(VI)) and sulfate radical were generated during reaction of bisulfite with Mn(Ⅶ), whereas bisulfite was depleted fast due to excess Mn(Ⅶ) concentrations and the system became the Mn(Ⅶ)/MnO_(2)system in the second stage. These results provide new insight into reaction mechanism of DCF with Mn(Ⅶ)as well as propose a feasible strategy for enhancing the treatment of D

关键词： Permanganate Diclofenac Aromatic secondary amines Precursor ionization scanning Reductant activation

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A highly hydrothermal stable copper-based catalyst for catalytic wet air oxidation of m-cresol in coal chemical wastewater

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Chinese Journal of Chemical Engineering 2023年第5期57卷 338-348页

作者： Bingxiao Feng Lining Hao chaoting Deng Jiaqiang Wang Hongbing Song Meng Xiao Tingting Huang Quanhong Zhu Hengjun Gai College of Chemical Engineering Qingdao University of Science and TechnologyQingdao 266042China

Catalytic wet air oxidation(CWAO) can degrade some refractory pollutants at a low cost to improve the biodegradability of wastewater. However, in the presence of high temperature and high pressure and strong oxidizing free radicals, the stability of catalysts is often insufficient, which has become a bottleneck in the application of CWAO. In this paper, a copper-based catalyst with excellent hydrothermal stability was designed and prepared. TiO_(2) with excellent stability was used as the carrier to ensure the longterm anchoring of copper and reduce the leaching of the catalyst. The one pot sol–gel method was used to ensure the super dispersion and uniform distribution of copper nanoparticles on the carrier, so as to ensure that more active centers could be retained in a longer period. Experiments show that the catalyst prepared by this method has good stability and catalytic activity, and the catalytic effect is not significantly reduced after 10 cycles of use. The oxidation degradation experiment of m-cresol with the strongest biological toxicity and the most difficult to degrade in coal chemical wastewater was carried out with this catalyst. The results showed that under the conditions of 140℃, 2 MPa and 2 h, m-cresol with a concentration of up to 1000 mg·L^(-1) could be completely degraded, and the COD removal rate could reach 79.15%. The biological toxicity of wastewater was significantly reduced. The development of the catalyst system has greatly improved the feasibility of CWAO in the treatment of refractory wastewater such as coal chemical wastewater.

关键词： Hydrothermal stability Ultra-dispersed copper-based catalyst Catalytic wet air oxidation m-Cresol Biological toxicity

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Hydrophilic bismuth sulfur nanoflower superstructures with an improved photothermal efficiency for ablation of cancer cells

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Nano Research 2016年第7期9卷 1934-1947页

作者： Zhiyin Xiao chaoting Xu Xiaohong Jiang Wenlong Zhang Yuxuan Peng Rujia Zou Xiaojuan Huang Qian Liu Zongyi Qin Junqing Hu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and Engineering Donghua University Shanghai 201620 China 2 College of Biological Chemical Sciences and Engineering Jiaxing University Jiaxing 314001 China School of Medicine Science Jiaxing University Jiaxing 314001 China College of Science Donghua University Shanghai 201620 China

Nanomaterials with intense near-infrared （NIR） absorption exhibit effective photon-to-thermal energy transfer capabilities and can generate heat to ablate cancer cells, thus playing a pivotal role in photothermal cancer therapeutics. Herein, hydrophilic flower-like bismuth sulfur （Bi2S3） superstructures with uniform size and improved NIR absorption were controllably synthesized via a facile solvothermal procedure assisted by polyvinylpyrrolidone （PVP）, which could adjust the product morphology. Induced by an 808-nm laser, the as-prepared Bi2S3 nanoflowers exhibited much higher photothermal conversion efficiency （64.3%） than that of Bi2S3 nanobelts （36.5%） prepared in the absence of PVP. This can be attributed not only to the Bi2S3 nanoflower superstructures assembled by 3-dimensional crumpled-paper-like nanosheets serving as many laser-cavity mirrors with improved reflectivity and absorption of NIR light but also to the amorphous structures with a lower band gap. Thus, to achieve the same temperature increase, the concentration or laser power density could be greatly reduced when using Bi2S3 nanoflowers compared to when using Bi2S3 nanobelts, which makes them more favorable for use in therapy due to decreased toxicity. Furthermore, these Bi2S3 nanoflowers effectively achieved photothermal ablation of cancer ceils in vitro and in vivo. These results not only supported the Bi2S3 nanoflowers as a promising photothermal agent for cancer therapy but also paved an approach to exploit new agents with improved photothermal efficiency.

关键词： bismuth sulfur nanoflowers photothermal agent photothermal conversionefficiency cancer therapy

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Differential DNA methylation profiles of human B lymphocytes and Epstein-Barr virus-immortalized B lymphocytes

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Chinese Journal of Cancer Research 2018年第1期30卷 104-111页

作者： chaoting Zhang Rui Zhang Zhiqiang Chen Jing Chen Jigang Ruan Zheming Lu Hongchao Xiong Wenjun Yang Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing) Laboratory of Biochemistry and Molecular BiologyPeking University Cancer Hospital & Institute Beijing 100142 China Key Laboratory of Fertility Preservation and Maintenance the School of Basic Medicine the General Hospital Ningxia Medical University Yinchuan 750004 China Department of Radiology the General HospitalNingxia Medical University Yinchuan 750004 China Department of Digestive System the General Hospital Ningxia Medical UniversityYinchuan 750004 China Key Laboratory of Carcinogenesis and Translational Research (Ministry of Education/Beijing) Department of Thoracic Surgery Peking University Cancer Hospital & Institute Beijing 100142 China

Objective： This study aimed to comprehensively assess Epstein-Barr virus（EBV）-induced methylation alterations of B cell across whole ***： We compared DNA methylation patterns of primary B cells and corresponding lymphoblastoid cell lines（LCLs） from eight participants. The genome-wide DNA methylation profiles were compared at over 850,000 genome-wide methylation ***： DNA methylation analysis revealed 87,732 differentially methylated Cp G sites, representing approximately 12.41% of all sites in LCLs compared to primary B cells. The hypermethylated and hypomethylated Cp G sites were about 22.75% or 77.25%, respectively. Only 0.8% of hypomethylated sites and 4.5% of hypermethylated sites were located in Cp G islands, whereas 8.0% of hypomethylated sites and 16.3% of hypermethylated sites were located in shore（N_shore and S_shore）. Using principal component analysis of the DNA methylation profiles, primary B cells and LCLs could be accurately predicted. Gene Ontology（GO） and Kyoto Encyclopedia of Genes and Genomes（KEGG） analysis of differently methylated genes revealed that most of the top GO biological processes were related to cell activation and immune response, and some top enrichment pathways were related with activation and malignant transformation of human B ***： Our study demonstrated genome-wide DNA methylation variations between primary B cells and corresponding LCLs, which might yield new insight on the methylation mechanism of EBV-induced immortalization.

关键词： DNA methylation Epstein-Barr virus next generation sequencing B cells LCLs

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Oral microbiome and risk of malignant esophageal lesions in a high-risk area of China:A nested case-control study

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Chinese Journal of Cancer Research 2020年第6期32卷 742-754页

作者： Fangfang Liu Mengfei Liu Ying Liu Chuanhai Guo Yunlai zhou Fenglei Li Ruiping Xu Zhen Liu Qiuju Deng Xiang Li chaoting Zhang Yaqi Pan Tao Ning Xiao Dong Zhe Hu Huanyu Bao Hong Cai Isabel Dos Santos Silva Zhonghu He Yang Ke Key Laboratory of Carcinogenesis and Translational Research(Ministry of Education/Beijing) Laboratory of GeneticsPeking University Cancer Hospital&InstituteBeijing 100142China Novogene Co. LtdBeijing 100080China Hua County People's Hospital Anyang 456400China Anyang Cancer Hospital Anyang 455000China Department of Non-communicable Disease Epidemiology London School of Hygiene&Tropical MedicineLondon WC1E 7HTUK

Objective:We aimed to prospectively evaluate the association of oral microbiome with malignant esophageal lesions and its predictive potential as a biomarker of ***:We conducted a case-control study nested within a population-based cohort with up to 8 visits of oral swab collection for each subject over an 11-year period in a high-risk area for esophageal cancer in *** oral microbiome was evaluated with 16 S ribosomal RNA(rRNA)gene sequencing in 428 pre-diagnostic oral specimens from 84 cases with esophageal lesions of severe squamous dysplasia and above(SDA)and 168 matched healthy *** analysis was performed to identify taxa of differential *** oral species together with subject characteristics were evaluated for their potential in predicting SDA risk by constructing conditional logistic regression ***:A total of 125 taxa including 37 named species showed significantly different abundance between SDA cases and controls(all P***:The oral microbiome may play an etiological and predictive role in esophageal cancer,and it holds promise as a non-invasive early warning biomarker for risk stratification for esophageal cancer screening programs.

关键词： Early warning biomarker esophageal squamous cell carcinoma oral microbiome risk prediction

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Development of Wireless Light Control System Based on Zigbee

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Communications and Network 2013年第1期5卷 29-33页

作者： Changfei Guo Xiaoping Zou chaoting Ma Rongrong Zhang Beijing Key Laboratory for Sensor Beijing Information Science and Technology University Beijing China

This paper presents a solution to wireless light control system based on Zigbee. Overall design framework of the system was introduced and analyzed in detail, which contained realization of hardware design. The Zigbee wireless light control system was established based on CC2430-chip of Texas Instruments (TI). In this paper, we achieved designing Printed Circuit Board (PCB) for sensor nodes as end device and coordinator in Protel DXP 2004 and also wrote C codes in IAR embedded workbench development tool to form wireless network. Test results of system show that lights on end device or router in Zigbee wireless sensor networks (WSN) can be controlled by another switch on coordinator, which achieved remotely wireless intelligence light control.

关键词： Wireless Light Control Zigbee PCB WSN

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