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Geobag stepped spillway for check dams: A pilot study

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International Journal of Sediment Research 2023年第1期38卷 115-127页

作者： Shu Yu Fan Yue Qiang Zhang Zuyu Chen Penghai Yin jianwei hao Laizhang Zhang Ludong hao State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower Research Northwest Engineering Corporation Limited State Key Laboratory of Eco-hydraulics in Northwest Arid Region Xi'an University of Technology Guilin University of Technology Upper and Middle Yellow River Bureau Yellow River Conservancy Commission of the Ministry of Water Resources Suide Test Station of Soil and Water Conservation Yellow River Conservancy Commission of the Ministry of Water Resources

Check dams are widely used worldwide for the soil and water conservation. Many of them have no spillways, resulting in frequent dam breach failures during heavy rainfall events. This paper proposes a new geobag stepped spillway for small check dams. The structure of the spillway primarily consists of a stepped chute created from geobags filled with local soil compacted and consolidated with a small amount of cement. The developed composite geosynthetic material exhibits water erosion resistance,high strength against puncture, and high tensile strength. To examine the feasibility of the proposed geobag stepped spillway, a prototype pilot test was designed and constructed in a check dam in Shaanxi Province, China, with a height of 10 m and a downstream slope of 1(vertical) to 2(horizontal). More than30 overflow tests were done for a geobag stepped spillway under uncontrolled and gated weir flow conditions. Based on the measurements of flow velocities and flow depths of four cross sections, it was observed that the energy dissipation ratio ranged between 73.8% and 92.8% for all the examined conditions. In addition, no significant deformation of the geobag stepped spillway was observed, although the maximum flow velocity at the spillway toe was 6.7 m/s. This study confirms that the proposed geobag stepped spillway is a promising approach for providing an effective, safe, and economical flood release structure for small check dams.

关键词： Geobag stepped spillways Check dams Composite geosynthetic material Energy dissipation

An Efficient Copper-Catalyzed One-Pot Synthesis of 1-Aryl-1,2,3-triazoles from Arylboronic Acids in Water under Mild Conditions

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Chinese Journal of Chemistry 2015年第11期33卷 1317-1320页

作者： Changbo hao Changjian Zhou jianwei Xie Jie Zhang Ping Liu Bin Dai School of Chemistry and Chemical Enginerring/Key Laboratory for Green Processing of Chemical Engineering of .Vinjiang Bingtuan Shihezi University Shihezi Xinjiang 832003 China

A convenient method for one-pot two-step 1,3-dipolar cycloadditon reaction of arylboronic acid, sodium azide followed with terminal alkynes in the presence of 2-pyrrolecarbaldiminato-Cu（Ⅱ） complexes catalyst is reported. Various 1-aryl-1,2,3-triazoles were prepared in 63%-97% yields in water at 30℃ without any additives and avoiding the isolation of unstable aryl azides.

关键词： 2-pyrrolecarbaldiminato-Cu(Ⅱ) complex 1-aryl-1,2,3-triazoles alkyne arylboronic acid water

Erosion-control mechanism of sediment check dams on the Loess Plateau

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International Journal of Sediment Research 2021年第5期36卷 668-677页

作者： Zhaoyin Wang Zuyu Chena Shu Yu Qiang Zhang Yu Wang jianwei hao State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin China Institute of Water Resources and Hydropower Research

Severe soil erosion occurs on the Loess Plateau in China, which makes the Yellow River the most sediment-laden river in the world. Construction of about 60,000 sediment check dams has remarkably controlled soil erosion on the Loess Plateau and reduced the sediment load of the middle and lower Yellow River. Nonetheless, little is known about the mechanism of erosion control and vegetation development of sediment check dams. The function of a single check dam mainly is trapping sediment,while the function of a train of check dams comprising dozens of or over hundreds of check dams in a gully encompasses controlling bed incision and reducing erosion energy. A formula was proposed to calculate the potential energy of bank failure and slope failure in a gully, which essentially constitutes the erosion energy. The erosion energy increases when gully incision occurs, which is induced by the incision of the Yellow River and its tributaries on the Loess Plateau. Sediment deposition in many gullies due to construction of check dams reduces the erosion energy to almost zero, which in turn greatly reduces soil erosion and sediment yield. Construction of check dams promotes vegetation development. The vegetation-erosion dynamics model was used to study the effect of check dams on vegetation development. Simulation results show that reforestation without check dam construction might result in an increase of vegetation cover in the first ten years and then a drop of vegetation cover to less than 10% in the later years. The check dams provide a foundation for vegetation development.

关键词： Loess plateau Check dam Energy of soil erosion Vegetation-erosion dynamics Gully incision

Evaluation of purified recombinant spike fragments forassessment of the presence of serum neutralizing antibodiesagainst a variant strain of porcine epidemic diarrhea virus

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Virologica Sinica 2017年第4期32卷 307-316页

作者： jianwei hao Yun Zhang Shengkun Fang Zhifen Wen Xiangbin Zhang Chunyi Xue Yongchang Cao State Key Laboratory of Biocontrol School of Life SciencesSun Yat-sen UniversityGuangzhou510006China Fraunhofer-lnstitut for Angewandte Informationstechnik FIT Sankt Augustin 53754Germany

Since 2010, variant strains of porcine epidemic diarrhea virus(PEDV) have caused disasters in the pork industry. The spike(S) protein, as the major immunity-eliciting antigen, has previously been used for serological testing and has been found to correlate significantly with the results of the serum neutralization(SN) test. However, further evaluation of this method is needed as new epidemic strains of PEDV emerge. Hence, the main objective of this study was to assess sow sera and determine the correlation between enzyme-linked immunosorbent assay(ELISA) results(involving a newly isolated GDS01 virus-based ELISA and ELISAs based on seven recombinant fragments comprising overlapping S1 and partial S2 sequences) and SN titers. Furthermore, we determined the reliability of the ELISAs based on receiver operating characteristics(ROC) curve analyses. For the most promising ELISA, i.e., the SP4 ELISA, the correlation coefficient(r) and the area under curve(AUC) were determined to be 0.6113 and 0.8538, respectively. In addition, we analyzed the homology of the SP4 sequences obtained from different strains(including vaccine strains) and found that various strains showed a high degree of homology in this region. Thus, we conclude that SP4 is a promising serological testing protein for use in the field.

关键词： Porcine epidemic diarrhea virus (PEDV) spike protein enzyme-linkedimmunosorbent assay serum neutralization test

Effect of Lithium Nitrate on the Structure and Property of α-Al2O3 Platelets Prepared via Solid-state Reaction

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China Petroleum Processing & Petrochemical Technology 2017年第2期19卷 8-13页

作者： Miao Zhuang Shi Jiangong Miao Qingyuan hao jianwei Zhang Yi Zhang Wenping SINOPEC Catalyst Beijing Co. Ltd. Beijing 102500 National Laboratory of Flame Retardant Materials National Engineering and Technology Research Center of Flame Retardant Materials Beijing Institute of Technology Beijing 100081 Production and Technology Department Sinopec Catalyst Co. Ltd. Beijing 100029

The α-Al_2O_3 platelets were prepared via solid-state reactions and the effect of the amount of lithium nitrate additive on the property of the platelets was investigated. The ICP results indicated that the high temperature calcination process resulted in a large loss of lithium species because of volatilization, but there was still a small amount of residual lithium species in the α-Al_2O_3 platelets. The SEM micrographs showed that lithium nitrate led to decrease in the thickness of α-Al_2O_3 platelets and irregular morphology of aggregates. Pore structures results exhibited that addition of lithium nitrate led to decrease in the pore size and increase in the specific surface area of aggregates of α-Al_2O_3 platelets. The XRD and IR patterns suggested that the residual lithium and aluminum oxide formed LiAl_5O_8. The existence of LiAl_5O_8 was the basic reason for the changed performance of α-Al_2O_3 platelets.

关键词： solid-state reaction α-Al2O3 platelets LiNO3 property

Kinetochore protein MAD1 participates in the DNA damage response through ataxia-telangiectasia mutated kinase-mediated phosphorylation and enhanced interaction with KU80

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Cancer Biology & Medicine 2020年第3期17卷 640-651页

作者： Mingming Xiao Xuesong Li Yang Su Zhuang Liu Yamei Han Shuai Wang Qinghua Zeng Hong Liu jianwei hao Bo Xu Department of Biochemistry and Molecular Biology Key Laboratory of Breast Cancer Prevention and TherapyMinistry of EducationTianjin Medical University Cancer Institute and HospitalNational Clinical Research Center for CancerKey Laboratory of Cancer Prevention and TherapyTianjinTianjin's Clinical Research Center for CancerTianjin 300060China Department of Oncology Southern Research InstituteBirminghamAL 35205USA Department of Neurosurgery Tianjin Huanhu HospitalTianjin 300350China Tianjin Key Laboratory of Cerebral Vascular and Neurodegenerative Diseases Tianjin 300350China Center for Intelligent Oncology Chongqing University Cancer HospitalChongqing University School of MedicineChongqing 400030China

Objective:Mitotic arrest-deficient protein 1(MAD1)is a kinetochore protein essential for the mitotic spindle *** studies have indicated that MAD1 is a component of the DNA damage response(DDR)***,whether and how MAD1 might be directly involved in the DDR is largely ***:We ectopically expressed the wild type,or a phosphorylation-site--mutated form of MAD1 in MAD1 knockdown cells to look for complementation *** used the comet assay,colony formation assay,immunofluorescence staining,and flow cytometry to assess the DDR,radiosensitivity,and the G2/M *** employed co-immunoprecipitation followed by mass spectrometry to identify MAD1 interacting *** were analyzed using the unpaired Student'***:We showed that MAD1 was required for an optimal DDR,as knocking down MAD1 resulted in impaired DNA repair and hypersensitivity to ionizing radiation(IR).We found that IR-induced serine 214 phosphorylation was ataxia-telangiectasia mutated(ATM)*** of serine 214 to alanine failed to rescue the phenotypes of MAD1 knockdown cells in response to *** mass spectrometry,we identified a protein complex mediated by MAD1 serine 214 phosphorylation in response to *** them,we showed that KU80 was a key protein that displayed enhanced interaction with MAD1 after DNA ***,we showed that MAD1 interaction with KU80 required serine 214 phosphorylation,and it was essential for activation of DNA protein kinases catalytic subunit(DNA-PKcs).Conclusions:MAD1 serine 214 phosphorylation mediated by ATM kinase in response to IR was required for the interaction with KU80 and activation of DNA-PKCs.

关键词： DNA damage response ataxia-telangiectasia mutated kinase(ATM) mitotic arrest-deficient protein 1(MAD1) KU80 protein DNA-PKcs

Ammonia Removal in Different Depth of Vertical Flow Wetland under Different Pre- aeration Time

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环境科学前沿（中英文版） 2013年第1期2卷 1-5页

作者： hao Wang jianwei Chen College of Civil and Architecture Engineering Hebei United University Tangshan P.R. China.

陶瓷前体改性竹基多孔碳协同聚磷酸铵阻燃环氧树脂及其热稳定性和力学性能

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高等学校化学学报 2023年第8期44卷 211-218页

作者：王芳郝建薇北京理工大学材料学院北京100081 北京市丰台区消防救援支队

绿色、低成本及高性能一直是材料制备面临的挑战.本文利用硅烷偶联剂水解产物硅醇与硼酸反应制备了硅硼陶瓷前驱体改性竹基多孔碳材料(MPCM),其中以γ-缩水甘油醚氧丙基三甲氧基硅烷(KH560)和硼酸改性的MPCM(M6PCM,质量分数1.6%)与聚磷... 详细信息

绿色、低成本及高性能一直是材料制备面临的挑战.本文利用硅烷偶联剂水解产物硅醇与硼酸反应制备了硅硼陶瓷前驱体改性竹基多孔碳材料(MPCM),其中以γ-缩水甘油醚氧丙基三甲氧基硅烷(KH560)和硼酸改性的MPCM(M6PCM,质量分数1.6%)与聚磷酸铵(APP,质量分数6.2%)协同阻燃环氧树脂(EP)的EP/APP/M6PCM复合材料氧指数达到了31.1%,热释放速率峰值降低了60%,残炭量增加了12.7%,玻璃化转变温度提高到136℃,储能模量达到3319 MPa.机理研究表明,M6PCM表面的硅硼陶瓷前驱体加快了APP脱除H_(2)O和NH_(3)形成聚磷酸的速度,促进了类陶瓷炭的形成及类石墨碳的转化.与相关研究结果相比,APP/M6PCM体系在提高EP复合材料性能的同时显示出了成本优势.

关键词：硅硼化合物多孔碳材料环氧树脂阻燃剂

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先进树脂基复合材料的技术现状及发展方向

航空制造技术 2001年第3期44卷 22-25页

作者：郝建伟中国航空工业第一集团公司

综述了国内外先进树脂基复合材料的发展、应用现状 ,提出了先进树脂基复合材料技术今后的发展方向。

关键词：树脂基复合材料技术现状飞机发展方向