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Effect of tillage state of paddy soils with heavy metal pollution on the nosZ gene of N_(2)O reductase

Journal of Environmental Sciences 2024年第3期137卷 469-477页

作者： Liping Jiang Shiguang Liu Shanyun Wang libo sun Guibing Zhu Key Laboratory of Drinking Water Science and Technology Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China School of Environmental and Civil Engineering Jiangnan UniversityWuxi 214122China

Paddy soils are an important source of atmospheric nitrous oxide(N_(2)O).However,numerous studies have focused on N_(2)O production during the soil tillage period,neglecting the N_(2)O production during the dry fallow *** this study,we conducted an incubation experiment using the acetylene inhibition technique to investigate N_(2)O emission and reduction rates of paddy soil profiles(0-1 m)from Guangdong Province and Jinlin Province in China,with different heavy-metal pollution *** abundance and community structures of denitrifying bacteria were determined via quantitative-PCR and Illumina MiSeq sequencing of nosZ,nirK,and nirS *** results showed that the potential N_(2)O emission rate,N_(2)O production rate,and denitrification rate have decreased with increasing soil vertical depth and heavy-metal *** importantly,we found that the functional gene type of N_(2)O reductase switched with the tillage state of paddy soils,which cladeⅡnos Z genes were the dominant gene during the tillage period,while cladeⅠnos Z genes were the dominant gene during the dry fallow *** heavy-metal pollution has less effect on the niche differentiation of the nos Z *** N_(2)O emission rate was significantly regulated by the genus Bradyhizobium,which contains both N_(2)O reductase and nitrite reductase *** findings suggests that the nos Z gene of N_(2)O reductase can significantly impact the N_(2)O emission from paddy soils.

关键词： Pappy soils N_(2)O reductase nosZ gene Heavy-metal pollution

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Ir-skinned Ir-Cu Nanoparticles with Enhanced Activity for Oxygen Reduction Reaction

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Chemical Research in Chinese Universities 2020年第3期36卷 467-472页

作者： WANG Jiarui ZHOU Ye sun libo GE Jingjie WANG Jingxian DAI Chencheng XU Zhichuan School of Materials Science&Engineehng Nanyang Technological University50 Nanyang Avenue 639798Singapore Solar Fuels Laboratory Nanyang Technological University50 Nanyang Avenue 639798Singapore Energy^Research Institute@NTU ERI@NInterdisciplinary Graduate SchoolNanyang Technological University50 Nanyang Avenue 639798Singapore

The development of methanol-tolerate oxygen reduction reaction(ORR)electrocatalysts is of special significance to direct methanol fuel cells *** is known for its better methanol tolerance than platinum and able to survive in harsh acidic ***,its activity is relatively low and thus the approach to improve Ir's ORR is ***,bimetallic Ir-Cu nanoparticles(NPs)with controllablc Ir/Cu compositions(ca.1:2 to 4:1,atomic ratio)are synthesized via a galvanic replacement-based chemical *** as-synthesized Ir-Cu NPs are investigated as ORR catalysts after electrochemically leaching out the surface Cu and forming Ir-skinned *** 2-to 3-fold enhancement in the intrinsic activity has been observed in these Ir-skinned Ir-Cu catalysts compared to Ir *** approach is demonstrated to be a promising way to prepare efficient Ir ORR catalysts and lower catalyst cost.

关键词： Iridium Copper Nanoparticle Dealloying Oxygen reduction reaction

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Highly selective and efficient electroreduction of CO_(2) in water by quaterpyridine derivative‐based molecular catalyst noncovalently tethered to carbon nanotubes

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SmartMat 2022年第1期3卷 151-162页

作者： Vikas Reddu libo sun Xiaogang Li Huile Jin Shun Wang Xin Wang School of Chemical and Biomedical Engineering Nanyang Technological UniversitySingaporeSingapore Cambridge Centre for Advanced Research and Education in Singapore Ltd(Cambridge CARES) CREATE TowerSingaporeSingapore College of Chemistry&Materials Engineering Wenzhou UniversityWenzhouChina

A disubstituted quaterpyridine based cobalt complex non‐covalently tethered to multiwalled carbon nanotube(MWCNT)substrate,forming a hybrid catalyst,Co‐qpyCOOH/CNT,catalyzed the conversion of CO_(2) to CO under aqueous *** an optimal and uniform loading,it exhibited remarkable catalytic activity,near‐exclusive selectivity,and high stability towards the formation of *** a mere cathodic potential of−0.65 V versus RHE(η=0.54 V),it achieved a high partial current density of−6.7 mA/cm^(2) and a ***=100%.In addition,with 20 h of stable operation,hydrogen evolution remained practically *** hybrid structure due to noncovalent immobilization on MWCNT imparted the intrinsic activity and much‐needed stability in performance whereas‒COOH groups may stabilize the intermediates by acting as H‐bond donors,promoting catalytic *** to a conductive solid substrate and tuning of the second sphere of coordination played an important role in its performance to achieve desired reduction product with high selectivity and activity.

关键词： carbon dioxide reduction cobalt complex disubstituted quaterpyridine heterogeneous molecular catalysis second coordination sphere

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A NEW TYPE OF PLATE BENDING ELEMENT

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Acta Mechanica Sinica 1987年第1期3卷 82-91页

作者： Ding Haojiang Zhou Weiyu sun libo (Zhejiang University) 1. Zhejiang University China

Based on a two-field generalized variational principle,a new type of arbitrary quadrilateralplate bending element,with four nodes and with the effect of transverse shear deformation taken intoaccount,is *** element is applicable to a wide range of plate thickness and an explicit expressionof stiffness matrix can be ***,it possesses the distinguished features of general applicability,high precision and less computer time.

关键词： computational mechanics finite element plate bending element

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Three-dimensional printed tissue engineered bone for canine mandibular defects

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Genes & Diseases 2020年第1期7卷 138-149页

作者： Li Zhang Junling Tang libo sun Ting Zheng Xianzhi Pu Yue Chen Kai Yang Department of Oral and Maxillofacial Surgery The First Affiliated Hospital of Chongqing Medical UniversityChongqing 400016China Department of Oral and Maxillofacial Surgery Hospital of Stomatology Southwest Medical UniversityLuzhouSichuan646000China Department of Hematology The Affiliated Hospital of Southwest Medical UniversityLuzhouSichuan646000China Department of Radiology The Affiliated Hospital of Southwest Medical UniversityLuzhouSichuan646000China Department of Nuclear Medicine The Affiliated Hospital of Southwest Medical UniversityLuzhouSichuan646000China

Background:Three-dimensional(3D)printed tissue engineered bone was used to repair the bone tissue defects in the oral and maxillofacial(OMF)region of experimental *** and methods:Canine bone marrow stromal cells(BMSCs)were obtained from 9 male Beagle dogs and in vitro cultured for osteogenic *** OMF region was scanned for 3D printed surgical guide plate and mold by ProJet1200 high-precision printer using implant materials followed sintering at 1250℃.The tissue engineered bones was co-cultured with BASCs for 2 or 8 *** cell scaffold composite was placed in the defects and fixed in 9 dogs in 3 *** CT and/or micro-CT scans were performed to observe the osteogenesis and material ***:BMSCs were cultured with osteogenic differentiation in the second generation(P2).The nanoporous hydroxyapatite implant was made using the 3D printing mold with the white porous structure and the hard *** with osteogenic induction were densely covered with the surface of the material after co-culture and ECM was secreted to form calcium-like crystal *** effect of the tissue engineered bone on the in vivo osteogenesis ability was no significant difference between 2 d and 8 d of the compositing ***:The tissue-engineered bone was constructed by 3D printing mold and hightemperature sintering to produce nanoporous hydroxyapatite scaffolds,which repair in situ bone defects in experimental *** time of compositing for tissue engineered bone was reduced from 8 d to 2 d without the in vivo effect.

关键词： Mandibular defect Tissue engineering bone 3D printing CAD/CAM BMSCs

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Optimizing interfacial electronic coupling with metal oxide to activate inert polyaniline for superior electrocatalytic hydrogen generation

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Carbon Energy 2019年第1期1卷 77-84页

作者： Zhen-Feng Huang Jiajia Song Yonghua Du Shuo Dou libo sun Wei Chen Kaidi Yuan Zhengfei Dai Xin Wang School of Chemical and Biomedical Engineering Nanyang Technological UniversitySingaporeSingapore Singapore-HUJ Alliance for Research and Enterprise NEW-CREATE Phase IICampus for Research Excellence and Technological Enterprise(CREATE)SingaporeSingapore Institute of Chemical and Engineering Sciences A*STARJurong IslandSingapore Department of Chemistry National University of SingaporeSingaporeSingapore School of Materials Science and Engineering Nanyang Technological UniversitySingaporeSingapore

Tuning and optimization of electronic structures and related reaction energetics are critical toward the rational design of efficient ***,experimental and theoretical calculation demonstrate the originally inert N site within polyaniline(PANI)can be activated for hydrogen evolution by proper d-πinterfacial electronic coupling with metal *** a result,the assynthesized WO3 assemblies@PANI via a facile redox-induced assembly and in situ polymerization,exhibits the electrocatalytic production of hydrogen better than other control samples including W18O49@PANI and most of the reported nobel-metal-free electrocatalysts,with low overpotential of 74 mV at 10 mA·cm−2 and small Tafel slope of 46 mV·dec−1 in 0.5M H2SO4(comparable to commercial Pt/C).The general efficacy of this methodology is also validated by extension to other metal oxides such as MoO3 with similar improvements.

关键词： hydrogen evolution interfacial electronic coupling metal oxide N-H bond polyaniline

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Clinical Research on Alleviating Pain for Patients with Ankylosing Spondylitis and Their Active Function by Acupuncture with Chinese Medicine Fuming and Steaming

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World Journal of Integrated Traditional and Western Medicine 2018年第2期4卷 13-18页

作者： Wang Boyu sun libo Chen Qiang Department of Internal Medicine Shang Hai Metallurgy Hospita

OBJECTIVE: To investigate clinical effect of acupuncture combined with TCM fumigation on pain and active function improvement in patients with ankylosing spondylitis. METHODS: 42 patients with ankylosing spondylitis were selected in hospital from October 2016 to October 2017, who were randomly divided into 2 groups by number table method. 21 patients received conventional treatment as control group. 21 patients combined with acupuncture, TCM fumigation treatment as observation group. Clinical indicators, activity function, pain scores were evaluated before and after treatment. RESULTS: Erythrocyte sedimentation rate, C reactive protein, alkaline phosphatase, macrophage migration inhibitory factor, BASDAI score, BASFI score, VAS score after treatment decreased in two groups compared with before treatment(P<0.05). Chest mobility, lumbar pitch, Schober test, occipital wall distance, lumbar lateral flexion after treatment increased in two groups compared with before treatment(P<0.05). Refers to distance, morning stiffness time, rump length after treatment reduced in two groups compared with before treatment(P<0.05). Erythrocyte sedimentation rate, C reactive protein, alkaline phosphatase, macrophage migration inhibitory factor, BASDAI score, BASFI score, VAS score in observation group were lower than control group after treatment(P<0.05). Chest mobility, lumbar pitch, Schober test, occipital wall distance, lumbar lateral flexion in observation group were higher than control group after treatment(P<0.05). Refers to distance, rump length in observation group were smaller than control group after treatment(P<0.05). Morning stiffness time in observation group was less than control group after treatment(P<0.05). CONCLUSIONS: Acupuncture combined with TCM fumigation can significantly improve pain and active function in patients with ankylosing spondylitis, which is worthy of clinical promotion.

关键词： Acupuncture Chinese Medicine fuming and steaming Ankylosing spondylitis Pain Active function

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Protein phosphatase 6 (Pp6) is crucial for regulatory T cell function and stability in autoimmunity

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Genes & Diseases 2022年第2期9卷 562-575页

作者： Wei Cai Junxun Zhang Hong Zhou Xiangxiao Li Fangzhou Lou Yang sun Zhenyao Xu Jing Bai Qianqian Yin Zhikai Wang libo sun Xiaojie Cai Sibei Tang Yue Wu Li Fan Hong Wang Honglin Wang Qun Li Department of Immunology and Microbiology Shanghai Institute of ImmunologyKey Laboratory of Cell Differentiation and Apoptosis of Chinese Ministry of EducationInstitute of Translational MedicineShanghai General HospitalShanghai Jiao Tong University School of Medicine(SJTU-SM)Shanghai 200025PR China The Department of Cardiovascular Medicine State Key Laboratory of Medical GenomicsShanghai Key Laboratory of HypertensionRuijin HospitalShanghai Institute of HypertensionShanghai Jiao Tong University School of MedicineShanghai 200025PR China

Regulatory T(T_(reg))cells constitute a dynamic population that is critical in autoimmunity.T_(reg) cell therapies for autoimmune diseases are mainly focused on enhancing their suppressive ***,recent studies demonstrated that certain inflammatory conditions induce T_(reg) cell instability with diminished FoxP3 expression and convert them into pathogenic effector ***,the identification of novel targets crucial to both T_(reg) cell function and plasticity is of vital importance to the development of therapeutic approaches in *** this study,we found that conditional Pp6 knockout(cKO)in T_(reg) cells led to spontaneous autoinflammation,immune cell activation,and diminished levels of FoxP3 in CD4^(+)T cells in *** of Pp6 in T_(reg) cells exacerbated two classical mouse models of T_(reg)-related ***,Pp6 deficiency increased CpG motif methylation of the FoxP3 locus by dephosphorylating Dnmt1 and enhancing Akt phosphorylation at Ser473/Thr308,leading to impaired FoxP3 expression in T_(reg) *** summary,our study proposes Pp6 as a critical positive regulator of FoxP3 that acts by decreasing DNA methylation of the FoxP3 gene enhancer and inhibiting Akt signaling,thus maintaining T_(reg) cell stability and preventing autoimmune diseases.

关键词： Akt DNA methyltransferase 1(Dnmt1) FoxP3 Protein phosphatase 6(Pp6)

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一锅法Suzuki-Heck反应构筑基于4-乙烯基苯硼酸的发光多孔有机聚合物

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化学学报 2015年第6期73卷 611-616页

作者：孙立波梁志强于吉红无机合成与制备化学国家重点实验室吉林大学长春130012

多孔有机骨架材料是近年来出现的一类具有较大的比表面积、孔尺寸小于2 nm的多孔有机聚合物材料.这些材料由较轻质量的C、H、O、N、B等元素组成,与常规的微孔材料如分子筛和金属-有机骨架化合物相比,它们具有较低的骨架密度和较高的比... 详细信息

多孔有机骨架材料是近年来出现的一类具有较大的比表面积、孔尺寸小于2 nm的多孔有机聚合物材料.这些材料由较轻质量的C、H、O、N、B等元素组成,与常规的微孔材料如分子筛和金属-有机骨架化合物相比,它们具有较低的骨架密度和较高的比表面积等优点.在本文中,我们选择4-乙烯基苯硼酸为底物,通过与芳基卤代物的Suzuki-Heck反应,发展了一种基于钯催化的一锅法合成发光多孔有机聚合物的新途径.红外光谱和固体13C核磁研究表明,4-乙烯基苯硼酸在聚合过程中与芳基卤代物之间的Suzuki-Heck反应进行较为完全.氮气等温吸附曲线表明,这类材料具有多孔的性质,BET比表面积最高可达552 m2g-1.由于聚合物中存在有较大的共轭基团,因此具有良好的发光性质.我们对这些发光有机多孔聚合物在荧光检测硝基化合物方面的应用进行了初步研究,发现它们对苦味酸(2,4,6-三硝基苯酚)具有良好的选择性检测能力.

关键词： Suzuki-Heck反应 4-乙烯基苯硼酸发光多孔有机聚合物检测

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基于生物力学的虚拟人运动控制及行走仿真

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计算机辅助设计与图形学学报 2018年第6期30卷 1110-1117页

作者：王建鹏秦文虎孙立博东南大学仪器科学与工程学院南京210096

为使虚拟人运动控制产生的运动行为更加接近真实人体运动,构建了一个基于生物力学的虚拟人运动控制系统.该控制系统主要包含3层:高层策略控制层,用于监控环境变化和虚拟人自身状态,并依据给定的控制策略向中间层送出控制信号;中间脊椎... 详细信息

为使虚拟人运动控制产生的运动行为更加接近真实人体运动,构建了一个基于生物力学的虚拟人运动控制系统.该控制系统主要包含3层:高层策略控制层,用于监控环境变化和虚拟人自身状态,并依据给定的控制策略向中间层送出控制信号;中间脊椎反射层,可接收来自高层的控制信号和感知到的虚拟人自身状态及环境信息,并映射为肌肉的激励信号;底层肌肉驱动层,通过引入肌腱模型来产生与真实人体肌肉力特性相同的驱动力.为了提高仿真行走运动的逼真性,在控制参数优化过程中引入步态相似度作为评价标准.在Matlab中的Simulink环境下进行虚拟人行走运动仿真实验的结果表明,文中系统能够自主控制虚拟人平稳行走且运动有很好的逼真性;仿真结果表明,该系统可行性强,且在优化过程中加入步态相似度评价标准获得的控制参数能够产生更为逼真的虚拟人行走运动.

关键词：生物力学虚拟人运动控制脊椎反射步态相似度

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