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Toxic effects of crude-oil-contaminated soil in aquatic environment on Carassius auratus and their hepatic antioxidant defense system

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Journal of Environmental Sciences 2009年第5期21卷 612-617页

作者： WANG Yuanyuan ZHOU Qixing PENG Shengwei MA Lena Q niu xiaowei Key Laboratory of Pollution Processes and Environmental Criteria (Ministry of Education of China) College of Environmental Science and Engineering Nankai University Tganjin 300071 China Soil and Water Science Department University of Florida Gainesville FL 32611-0290 USA

Under the indoor simulant conditions, toxic effects of crude-oil-contaminated soil which was put into aquatic environment on the young fishes Carassius auratus and their hepatic antioxidant system after a 20-d exposure were investigated. Results showed that the relationship between the mortality of C. auratus and the exposed doses could be divided into 3 phases： fishes exposed to the low dose groups （0.5-5.0 g/L） were dead due to the ingestion of crude-oil-contaminated soils in aquatic environment; at the medium dose groups （5.0-25.0 g/L） fishes were dead due to the penetration of toxic substances; at the high dose groups （25.0-50.0 g/L） fishes were dead due to environmental stress. The highest mortality and death speed were found in the 1.0 g/L dose group, and the death speed was sharply increased in the 50.0 g/L dose group in the late phase of exposure. The activities of superoxide dismutase （SOD）, catalase （CAT） and glutathione S-transferase （GST） and the content of malaondialdehyde （MDA） in the hepatic tissues of C. auratus were induced significantly. The activity of SOD was increased and then decreased. It was significantly inhibited in the 50.0 g/L dose group. The activity of CAT was highly induced, and restored to a level which is little more than the control when the exposed doses exceeded 10.0 g/L. The activity of GST was the most sensitive, it was significantly induced in all dose groups, and the highest elevation was up to 6 times in the 0.5 g/L dose group comparing with the control. The MDA content was significantly elevated in the 50.0 g/L dose group, and the changes of the MDA content were opposite with the changes of GST activity.

关键词： crude-oil-contaminated soil ecotoxicology aquatic environment Carassius auratus antioxidant defense system

Far-field coseismic gravity changes related to the 2015 MW7.8 Nepal(Gorkha)earthquake observed by superconducting gravimeters in Chinese mainland

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Earth and Planetary Physics 2021年第2期5卷 141-148页

作者： LeLin Xing ZiWei Liu JianGang Jia ShuQing Wu ZhengSong Chen xiaowei niu Innovation Academy for Precision Measurement Science and Technology Chinese Academy of SciencesWuhan 430077China State Key Laboratory of Geodesy and Earth’s Dynamics Chinese Academy of SciencesWuhan 430077China Hubei Earthquake Agency Wuhan 430071China School of Geodesy and Geomatics Wuhan UniversityWuhan 430079China National Institute of Metrology ChinaBeijing 100029China

Using data from five SGs at four stations in Chinese mainland,obvious permanent gravity changes caused by the 2015 MW7.8 Nepal(Gorkha)earthquake were *** analyzed the gravity effects from ground vertical deformation(VD)using co-site continuous GPS(cGPS)data collocated at the Lijiang and the Wuhan station,and hydrological effects using GLDAS models and groundwater level *** removing these effects,SG observations before and after the earthquake revealed obvious permanent gravity changes:−3.0μGal,7.3μGal and 8.0μGal at Lhasa,Lijiang and Wuhan station,*** found that the gravity changes cannot be explained by the results of dislocation theory.

关键词： the 2015 Nepal earthquake superconducting gravimeter coseismic gravity change

High-throughput Sequencing Reveals vsiRNAs Derived from Cucumber green mottle mosaic virus-infected Watermelon

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Horticultural Plant Journal 2017年第1期3卷 17-22页

作者： SUN Yuyan niu xiaowei CUI Di FAN Min Institute of Vegetables Zhejiang Academy of Agricultural Sciences

Cucumber green mottle mosaic virus(CGMMV) is a member of the genus Tobamovirus, and is a serious pathogen of Cucurbitaceae crops. Virusderived small interfering RNAs(vsi RNAs), which are processed by Dicer-like and Argonaute proteins as well as RNA-dependent RNA polymerase,mediate the silencing of viral genomic RNA and host transcripts. To identify the CGMMV derived vsi RNAs and reveal interactions between CGMMV and watermelon host plant, deep sequencing technology was used to identify and characterize the vsi RNAs derived from CGMMV in infected watermelon plants in present study. A total of 10 801 368 vsi RNA reads representing 71 583 unique s RNAs were predicted in CGMMVinoculated watermelon plants. The CGMMV vsi RNAs were mostly 21 or 22 nt long. The majority of the CGMMV vsi RNAs(i.e., 91.7%) originated from the viral sense strand. Additionally, uracil was the predominant 5′-terminal base of vsi RNAs. Furthermore, the putative targets and functions of some of the CGMMV vsi RNAs were predicted and investigated. The results enhance our understanding of the interaction between CGMMV and the host watermelon and provide molecular basis for CGMMV resistance improvement in watermelon and other Cucurbitaceae crops.

关键词： Citrullus lanatus cucumber green mottle mosaic virus high-throughput sequencing vsiRNAs

Colloidal synthesis and phase transformation of all-inorganic bismuth halide perovskite nanoplates

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Nano Research 2023年第1期16卷 1703-1711页

作者： Chao Wang Jiawen Xiao Zhengguang Yan xiaowei niu Taifeng Lin Yingchun Zhou Jingyu Li Xiaodong Han Institute of Microstructure and Property of Advanced Materials Beijing Key Lab of Microstructure and Property of Advanced MaterialsFaculty of Materials and ManufacturingBeijing University of TechnologyBeijing 100124China Faculty of Environment and Life Beijing University of TechnologyBeijing 100124China

Lead-free bismuth-based halide perovskites and their analogues have attracted research interest for their high stability and optoelectronic ***,the morphology-controlled synthesis of bismuth-based perovskite nanocrystals has been rarely ***,we report the colloidal synthesis of zero-dimensional(0D)Cs3BiCl6 nanosheets(NSs),Cs3Bi2Cl9 NSs/nanoplates(NPs)and Cs4MnBi2Cl12 NPs through a hot-injection *** demonstrate that the Cs3BiCl6 NSs,as an initial product of Cs3Bi2Cl9 and Cs4MnBi2Cl12 NPs,can transform into Cs3Bi2Cl9 NSs or Cs4MnBi2Cl12 NPs via Cl-induced metal ion insertion reactions under the templating effect of *** growth mechanism is also applicable for the synthesis of Cs4CdBi2Cl12 ***,the alloying of Cd2+into Cs4MnBi2Cl12 lattice could weaken the strong coupling effect between Mn and Mn,which leads to a prolonged photoluminescence lifetime and an enhanced photoluminescence quantum yield(PLQY).As a proof of concept,the alloyed Cs4MnxCd1–xBi2Cl12 NPs are used as a scintillator,which show a lowest detection limit of 134.5 nGy/*** X-ray imaging results display a high spatial resolution of over 20 line pairs per millimeter(lp/mm).These results provide new insights in the synthesis of anisotropic bismuth-based perovskite nanocrystals and their applications in radiation detection.

关键词： bismuth-based perovskites layered double perovskite nanoplates morphology control scintillators

A new and high-precision gravity base network in the south of the Tibetan Plateau

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Geodesy and Geodynamics 2020年第4期11卷 258-264页

作者： Lelin Xing Lei Bai xiaowei niu Peng Sang Innovation Academy for Precision Measurement Science and Technology Chinese Academy of SciencesWuhan430077China State Key Laboratory of Geodesy and Earth's Dynamic Chinese Academy of SciencesWuhan430077China

A new gravity base network in the south of the Tibetan Plateau was established with a FG5X absolute gravimeter and three CG-6 *** gravity base network consists of 10 absolute gravity points and 17 relative gravity *** of the absolute data,pre-processing of the relative data and gravity network adjustment model are briefly *** a constrained weighted least squares,the combined adjustment of absolute and relative gravity measurements results in the gravity values with a precision of about±4.1μGal.

关键词： Tibetan plateau Gravity datum Gravity network adjustment

Gravity Change Caused by Heavy Rainfall Detected by A gPhone Gravimeter in Zhengzhou， China

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Journal of Earth Science 2021年

作者： LeLin Xing YuFei Han xiaowei niu Lei Bai Innovation Academy for Precision Measurement Science and Technology， Chinese Academy of Sciences State Key Laboratory of Geodesy and Earth's Dynamics， Chinese Academy of Sciences China Earthquake Networks Center University of Chinese Academy of Sciences

The short-term effect of heavy rainfall on gPhone gravimeter observation at Zhengzhou seismic station is investigated. According to the observation data during 2021-07-17～07-20， the corrected gravity residual reflects the gravimetric response caused by heavy rainfall. The observed gravity change is dominated by the local effect considering topographic effect on gravity. The deduced water depth near the observation station is about 300 mm.

关键词： gravity gravity change heavy rain gravimeter gPhone

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论党章中民主集中制条文变动的历史轨迹

学习论坛 2024年第3期 24-34页

作者：乔贵平牛小伟天津师范大学政治与行政学院天津300387

民主集中制是中国共产党的独特制度优势。立足于党章文本,系统考察历次党章中关于民主集中制条文内容的变化可以发现,中国共产党对民主集中制的理论探索与实践应用经历了确立与坚实奠基、拓展与曲折前进、健全与接续推进、创新与拾级而... 详细信息

民主集中制是中国共产党的独特制度优势。立足于党章文本,系统考察历次党章中关于民主集中制条文内容的变化可以发现,中国共产党对民主集中制的理论探索与实践应用经历了确立与坚实奠基、拓展与曲折前进、健全与接续推进、创新与拾级而上四个演进阶段。中国共产党对民主集中制认识与实践的不断深化,生动反映了民主集中制的不断完善与创新,有力推动了党在政治上思想上组织上逐步走向成熟。揭示这一历史变迁和演化规律,对于从党内法规发展史的视角深刻认识和全面把握民主集中制,在全面建设社会主义现代化国家的新征程上持续彰显民主集中制的独特优势与治理效能,具有重要价值和现实意义。

关键词：民主集中制党章中国共产党制度建设

IoT Based Greenhouse Real-Time Data Acquisition and Visualization through Message Queuing Telemetry Transfer (MQTT) Protocol

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Advances in Internet of Things 2021年第2期11卷 77-93页

作者： Vincent de Paul Niyigena Kwizera Zhanming Li Victus Elikplim Lumorvie Febronie Nambajemariya xiaowei niu School of Electrical and Information Engineering Lanzhou University of Technology Qilihe District Lanzhou China School of Computer and Communication Lanzhou University of Technology Qilihe District Lanzhou China School of Electronics and Information Engineering Lanzhou Jiaotong University Lanzhou China

One of the most indispensable needs of life is food and its worldwide availability endorsement has made agriculture an essential sector in recent years. As the technology evolved, the need to maintain a good and suitable climate in the greenhouse became imperative to ensure that the indoor plants are more productive hence the agriculture sector was not left behind. That notwithstanding, the introduction and deployment of IoT technology in agriculture solves many problems and increases crop production. This paper focuses mainly on the deployment of the Internet of Things (IoT) in acquiring real- time data of environmental parameters in the greenhouse. Various IoT technologies that can be applicable in greenhouse monitoring system was presented and in the proposed model, a method is developed to send the air temperature and humidity data obtained by the DHT11 sensor to the cloud using an ESP8266-based NodeMCU and firstly to the cloud platform Thing- Speak, and then to *** in which MQTT protocol was used for the reception of sensor data to the application layer referred as Human-Machine Interface. The system has been completely implemented in an actual prototype, allowing the acquiring of data and the publisher/subscriber concept used for communication. The data is published with a broker’s aid, which is responsible for transferring messages to the intended clients based on topic choice. Lastly, the functionality testing of MQTT was carried out and the results showed that the messages are successfully published.

关键词： Greenhouse Sensors Monitoring System Internet of Things (IOT) Thing-Speak Data Visualization MQTT Adafruit.IO MQTT Testing

Al_(2)O_(3)/LiAlO_(2)协同提升LiNi_(0.92)Co_(0.04)Mn_(0.04)O_(2)正极材料循环稳定性的研究

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有色金属科学与工程 2024年第2期15卷 228-236页

作者：牛小伟李妍泽河南省轨道交通智能安全工程技术研究中心郑州450018 郑州铁路职业技术学院郑州450052

锂离子电池(LIBs)是最普遍的储能设备之一,高镍LiNi_(0.92)Co_(0.04)Mn_(0.04)O_(2)正极因其放电比容量高而备受关注,然而,在长循环的过程中,由于正极表面的活性物质发生了化学和结构变化,LIBs的能量存储能力会随着循环的进行而减弱。... 详细信息

锂离子电池(LIBs)是最普遍的储能设备之一,高镍LiNi_(0.92)Co_(0.04)Mn_(0.04)O_(2)正极因其放电比容量高而备受关注,然而,在长循环的过程中,由于正极表面的活性物质发生了化学和结构变化,LIBs的能量存储能力会随着循环的进行而减弱。理解和缓解这些退化机制是减少容量衰退的关键,从而提高锂离子电池的循环寿命。包覆是常见的改性手段,可改善高镍LiNi_(0.92)Co_(0.04)Mn_(0.04)O_(2)正极界面稳定性并降低表面降解的程度。但是,常规包覆方法形成的包覆层的厚度和均匀性难以调控,为了改进此问题,本研究建立了一种Al_(2)O_(3)/LiAlO_(2)薄膜,对LiNi_(0.92)Co_(0.04)Mn_(0.04)O_(2)具有协同改性效应,可形成厚度均匀的双包覆层,增强正极材料的循环性能和结构稳定性。研究结果表明,Al_(2)O_(3)/LiAlO_(2)双包覆层可以有效抑制不可逆相变,提高材料的结构稳定性。改性的材料展现出优异的循环稳定性,在2.75~4.40V电压范围内循环200圈,放电比容量为141.2 mAh/g,容量保持率高达76.1%。本研究为商业化正极材料界面的改性提供了新的思路。

关键词：锂离子电池均匀性 Al_(2)O_(3)/LiAlO_(2)双包覆层容量保持率