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Soil microbial communities as potential regulators of N2O sources in highly acidic soils

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Soil Ecology Letters 2023年第4期5卷 81-87页

作者： junhui yin Huaihai Chen Pengpeng Duan Kun Zhu Naihui Li Yan Ma Yumeng Xu Jingheng Guo Rui Liu Qing Chen Beijing Key Laboratory of Farmyard Soil Pollution Prevention-control and Remediation College of Resources and Environmental SciencesChina Agricultural UniversityBeijing 100193China State Key Laboratory of Biocontrol School of EcologySun Yat-sen UniversityGuangzhou 510006China Key Laboratory of Agro–Ecological Processes in Subtropical Region Institute of Subtropical AgricultureChinese Academy of SciencesChangsha 410125China College of Land Science and Technology China Agricultural UniversityBeijing 100193China Department of Horticulture Northeast Agricultural UniversityHarbin 150030China

●Soil pH was a key driver of N2O emission and sources in acidic soils.●N2O emission was significantly positively associated with the ratio of ITS to 16S.●N2O was significantly correlated with bacterial and fungal community composition.●Fungi contributed to N2O in highly acidic tea plantations and vegetable *** soil is a main source of global nitrous oxide(N2O)***,the mechanism behind the high N2O emissions from acidic soils remains a knowledge *** objective of this microcosm incubation study was to pin-point the microbial mechanisms involved in N2O production processes in acidic *** that purpose,the isotopic signatures and microbial community structure and composition of four soil samples were *** results showed that highly acid soils(pH=3.51)emitted 89 times more N2O than alkaline soils(pH=7.95)under the same nitrogen(N)*** denitrification caused high N2O emissions in acidic *** to 16S abundance ratio was positively correlated with cumulative N2O emissions from the tested *** highly acid soils(pHying fungi in particular,shaped by low pH(pH<4.5)lead to high N2O emissions from acidic soils.

关键词： nitrous oxide ITS 16S ratio fungal denitrification soil pH vegetable field tea plantation

Compressive Behaviour and Failure Mechanisms of GFRP Composite at High Strain Rates

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Journal of Beijing Institute of Technology 2019年第1期28卷 184-190页

作者： Dejun yin Jian Zheng Chao Xiong junhui yin Huiyong Deng Xiaobo Su Department of Artillery Engineering Army Engineering University Shijiazhuang Division of PLAA Infantry College

Experimental investigations into the compressive behavior of glass fiber reinforced polymer(GFRP)composite at high strain rates were carried out using a split Hopkinson pressure bar(SHPB)*** GFRP laminates were made from E-glass fibers and epoxy resins by vacuum assisted compression molding *** results of the compressive tests indicated that the mechanical behavior of the GFRP composite depends highly on the strain *** compressive peak stress,toughness and Young's modulus of the GFRP composite increased with the increase of strain rate,while the strain level at the initial stages of damage was shortened with the increase of strain *** addition,the dynamic deformation behavior and failure process of the specimens were observed directly by using a high-speed *** the experiments,the fracture morphologies and damage modes were examined by scanning electron microscopy(SEM)to explore the possible failure mechanisms of the *** results showed that multiple failure mechanisms appeared,such as matrix crack,fiber-matrix debonding,fiber failure and shear fracture.

关键词： glass fiber reinforced polymer(GFRP)composite split Hopkinson pressure bar(SHPB) compressive behavior failure mechanism high-speed camera

Correction to:Nb2C MXene‑Functionalized Scaffolds Enables Osteosarcoma Phototherapy and Angiogenesis/Osteogenesis of Bone Defects

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Nano-Micro Letters 2022年第5期14卷 18-19页

作者： junhui yin Shanshan Pan Xiang Guo Youshui Gao Daoyu Zhu Qianhao Yang Junjie Gao Changqing Zhang Yu Chen Institute of Microsurgery On Extremities Shanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai 200233People’s Republic of China School of Life Sciences Shanghai UniversityShanghai 200444People’s Republic of China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050People’s Republic of China Department of Orthopaedic Surgery Shanghai Jiao Tong University Affiliated Sixth People’s HospitalShanghai 200233People’s Republic of China Department of Orthopedics The Second Affiliated HospitalThe Navy Medical UniversityShanghai 200003People’s Republic of China

The original version of this article unfortunately contain some mistakes in *** authors found that the curves in Fig.1f,g were *** corrected version of Fig.1 is given below:Fig.1 Fabrication and characterization of ultrathin 2D Nb2C MXene NSs.a,b SEM images of Nb2AlC ceramics with corresponding element mapping(Nb,Al and C).c,d SEM images of multilayered Nb2C MXene and the corresponding element mapping(Nb,Al and C).

关键词： ceramics MXene Nb2

Nb2C MXene-Functionalized Scaffolds Enables Osteosarcoma Phototherapy and Angiogenesis/Osteogenesis of Bone Defects

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Nano-Micro Letters 2021年第2期13卷 162-179页

Early surgical resection and chemotherapy of bone cancer are commonly used in the treatment of bone tumor,but it is still highly challenging to prevent recurrence and fill the bone defect caused by the resection *** this work,we report a rational integration of photonic-responsive two-dimensional(2D)ultrathin niobium carbide(Nb2C)MXene nanosheets(NSs)into the 3D-printed bone-mimetic scaffolds(NBGS)for osteosarcoma *** integrated 2D Nb2C-MXene NSs feature specific photonic response in the second near-infrared(NIR-II)biowindow with high tissue-penetrating depth,making it highly efficient in killing bone cancer ***,Nb-based species released by the biodegradation of Nb2C MXene can obviously promote the neogenesis and migration of blood vessels in the defect site,which can transport more oxygen,vitamins and energy around the bone defect for the reparative process,and gather more immune cells around the defect site to accelerate the degradation of *** degradation of NBGS provides sufficient space for the bone ***,calcium and phosphate released during the degradation of the scaffold can promote the mineralization of new bone *** intrinsic multifunctionality of killing bone tumor cell and promoting angiogenesis and bone regeneration makes the engineered Nb2C MXeneintegrated composite scaffolds a distinctive implanting biomaterial on the efficient treatment of bone tumor.

关键词： Nb2C MXene 3D printing Phototherapy Osteosarcoma Vascularization

Intercellular mitochondrial transfer as a means of tissue revitalization

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Signal Transduction and Targeted Therapy 2021年第3期6卷 705-722页

作者： Delin Liu Youshui Gao Jiao Liu Yigang Huang junhui yin Yuyao Feng Linjing Shi Bruno PMeloni Changqing Zhang Minghao Zheng Junjie Gao Centre for Orthopaedic Research School of SurgeryThe University of Western AustraliaNedlandsWA 6009Australia Perron Institute for Neurological and Translational Science NedlandsWA 6009Australia Department of Orthopaedics Shanghai Jiao Tong University Affiliated Shanghai Sixth People's HospitalShanghai 200233China Department of Hepatobiliary Surgery Shanghai Public Health Clinical CenterFudan UniversityShanghai 200083China School of Medicine Zhejiang UniversityHangzhouZhejiang Province 310058China School of Life Sciences Zhejiang UniversityHangzhouZhejiang Province 310058China

As the crucial powerhouse for cell metabolism and tissue survival,the mitochondrion frequently undergoes morphological or positional changes when responding to various stresses and energy *** addition to intracellular changes,mitochondria can also be transferred *** restoring stressed cells and damaged tissues due to mitochondrial dysfunction,the intercellular mitochondrial transfer also occurs under physiological *** this review,the phenomenon of mitochondrial transfer is described according to its function under both physiological and pathological conditions,including tissue homeostasis,damaged tissue repair,tumor progression,and ***,the mechanisms that contribute to this process are summarized,such as the trigger factors and transfer ***,various perspectives are explored to better understand the mysteries of cell-cell mitochondrial *** addition,potential therapeutic strategies for mitochondria-targeted application to rescue tissue damage and degeneration,as well as the inhibition of tumor progression,are discussed.

关键词： metabolism homeostasis degeneration

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董事会断裂带与企业研发操纵

科技进步与对策 2023年第15期40卷 115-126页

作者：尹钧惠盖瑶孙浩然天津科技大学经济与管理学院天津300457

基于人口统计断层理论,以2009—2019年中国A股上市公司为样本,从公司董事会治理角度研究董事会断裂带对研发操纵的影响。结果发现:董事会断裂带与研发操纵呈显著U型关系;内部控制正向调节董事会断裂带与研发操纵的U型关系;市场化程度正... 详细信息

基于人口统计断层理论,以2009—2019年中国A股上市公司为样本,从公司董事会治理角度研究董事会断裂带对研发操纵的影响。结果发现:董事会断裂带与研发操纵呈显著U型关系;内部控制正向调节董事会断裂带与研发操纵的U型关系;市场化程度正向调节董事会断裂带与研发操纵的U型关系。进一步研究发现,董事会断裂带与研发操纵的U型关系在非国有企业、股权集中度较高、盈利和经营业绩较好的企业中更为显著。结论可为优化企业董事会结构、提升公司内部治理能力以及强化政府监管职能提供启示。

关键词：董事会断裂带研发操纵内部控制市场化程度

层状复合结构的应力波传播规律及能量耗散机制研究

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振动与冲击 2022年第15期41卷 209-216页

作者：邹有纯熊超殷军辉邓辉咏崔凯波陆军工程大学(石家庄校区)火炮工程系河北050003

为研究层状复合结构的应力波特性和能量耗散机制,设计了碳化硅陶瓷/超高分子量聚乙烯/钛合金(SiC/UHMWPE/TC4)和SiC/TC4/UHMWPE两种复合结构,并进行了SHPB(split-Hopkinson pressure bar)试验和数值模拟。基于金属丝缠绕材料(entangled ... 详细信息

为研究层状复合结构的应力波特性和能量耗散机制,设计了碳化硅陶瓷/超高分子量聚乙烯/钛合金(SiC/UHMWPE/TC4)和SiC/TC4/UHMWPE两种复合结构,并进行了SHPB(split-Hopkinson pressure bar)试验和数值模拟。基于金属丝缠绕材料(entangled metallic wire material,EMWM)出色的能量耗散性能,设计了SiC/UHMWPE/EMWM/TC4和SiC/TC4/EMWM/UHMWPE复合结构,并进行了SHPB试验。结果表明,复合结构中的EMWM对应力波的透射传播具有延迟和阻碍效应。EMWM复合结构主要通过反射大部分入射能量来耗散冲击能量,相比于其他复合结构主要通过SiC的破坏来耗散冲击能量相比,EMWM复合结构的能量耗散机制更合理,抗冲击性能更好。UHMWPE置于SiC的背部可以充分发挥UHMWPE和EMWM的缓冲性能,减小SiC的损伤。而TC4置于SiC的背部会加剧SiC的损伤。

关键词：金属丝缠绕材料(EMWM) 动态冲击能量耗散机制复合结构

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层状复合结构抗侵彻性能试验与数值模拟

复合材料学报 2022年第4期39卷 1748-1760页

作者：邹有纯熊超殷军辉崔凯波邓辉咏陆军工程大学石家庄校区火炮工程系石家庄050003

为研究3层及以上层状复合结构和金属丝缠绕材料(Entangled metallic wire material,EMWM)夹芯复合结构的抗侵彻性能,本文设计了4种复合结构:碳化硅陶瓷/超高分子量聚乙烯/钛合金(SiC/UHMWPE/TC4)、SiC/TC4/UHMWPE、SiC/UHMWPE/EMWM/TC4和SiC/TC4/EMWM/UHMWPE。采用霍普金森压杆试验,研究了复合结构的动态力学行为。基于侵彻试验和数值模拟分析了复合结构的抗侵彻机制、防护性能和能量特性。最后,探索了约束效应对EMWM复合结构抗侵彻性能的影响。结果表明,本文设计的4种复合结构在减轻质量和减小厚度方面具有优势;EMWM在复合结构中能够延迟,阻碍应力波的透射,有助于减小复合结构的损伤;对EMWM施加约束可显著提高EMWM复合结构的抗侵彻性能。

关键词：复合防护结构装甲侵彻弹道测试有限元模拟

Nb2C MXene-Functionalized Sca olds Enables Osteosarcoma Phototherapy and Angiogenesis/Osteogenesis of Bone Defects

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Nano-Micro Letters 2021年第2期13卷 168-185页

作者： junhui yin Shanshan Pan Xiang Guo Youshui Gao Daoyu Zhu Qianhao Yang Junjie Gao Changqing Zhang Yu Chen Institute of Microsurgery On Extremities Shanghai Jiao Tong University A liated Sixth People's Hospital Department of Orthopaedic Surgery Shanghai Jiao Tong University A liated Sixth People's Hospital School of Life Sciences Shanghai University State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of Ceramics Chinese Academy of Sciences Department of Orthopedics The Second A liated Hospital The Navy Medical University

Early surgical resection and chemotherapy of bone cancer are commonly used in the treatment of bone tumor,but it is still highly challenging to prevent recurrence and fill the bone defect caused by the resection *** this work,we report a rational integration of photonic-responsive two-dimensional(2D) ultrathin niobium carbide(Nb2C)MXene nanosheets(NS s) into the 3D-printed bone-mimetic scaffolds(NBGS) for osteosarcoma *** integrated 2D Nb2C-MXene NSs feature specific photonic response in the second near-infrared(NIR-Ⅱ) biowindow with high tissue-penetrating depth,making it highly efficient in killing bone cancer ***,Nb-based species released by the biodegradation of Nb2C MXene can obviously promote the neogenesis and migration of blood vessels in the defect site,which can transport more oxygen,vitamins and energy around the bone defect for the reparative process,and gather more immune cells around the defect site to accelerate the degradation of *** degradation of NBGS provides sufficient space for the bone ***,calcium and phosphate released during the degradation of the scaffold can promote the mineralization of new bone *** intrinsic multifunctionality of killing bone tumor cell and promoting angiogenesis and bone regeneration makes the engineered Nb2C MXeneintegrated composite scaffolds a distinctive implanting biomaterial on the efficient treatment of bone tumor.

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