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Soil fauna accelerated litter C and N release by improving litter quality across an elevational gradient

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Ecological Processes 2023年第1期12卷 632-644页

作者： Li Zhang Jingru Liu Rui Yin Zhenfeng xu Chengming You Han Li Lixia Wang Sining Liu Hongwei xu Lin xu Yang Liu Yong Wang Bo Tan Forestry Ecological Engineering in Upper Reaches of Yangtze River Key Laboratory of Sichuan Province College of ForestrySichuan Agricultural UniversityChengdu 611130China College of Natural Resources and Environment Northwest A&F UniversityYangling 712100ShaanxiChina

Background Soil fauna is an important driver of carbon(C)and nitrogen(N)release from decomposing litter in forest ***,its role in C and N cycling concerning climate and litter traits remains less *** a 4-year field experiment,we evaluated the effects of soil fauna on litter C and N release across an elevation gradient(453,945,3023,and 3582 m)and litter traits(coniferous ***)in southwestern *** Our results showed that N was retained by–0.4%to 31.5%,but C was immediately released during the early stage(156–516 days)of decomposition for most litter *** fauna significantly increased the peak N content and N retention across litter species,but reduced the C/N ratio for certain species(i.e.,Juniperus saltuaria,Betula albosinensis,Quercus acutissima,and Pinus massoniana litter),leading to more C and N being released from decomposing litter across the elevation *** of soil fauna to C and N release were 3.87–9.90%and 1.10–8.71%,respectively,across litter species after 4 years of *** environment and initial litter quality factors caused by elevation directly affected litter C and N *** in soil fauna resulting from elevation and fauna exclusion factors had a direct or indirect impact on C and N release during litter *** Our findings suggest that soil fauna promote C and N release from decomposing litter in different magnitudes,mainly controlled by environmental conditions(i.e.,temperature and moisture),litter quality(i.e.,lignin and cellulose content,and lignin/cellulose),and its diversity across the elevation gradient.

关键词： Carbon remaining Nitrogen remaining Nitrogen retention Soil fauna Elevational gradient

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Structural Variation between the Western and Eastern Kuqa Fold-and-thrust Belt,China:Insights from Seismic Interpretation and Analog Modeling

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Acta Geologica Sinica(English Edition) 2023年第4期97卷 1078-1093页

作者： WANG Wei XIE Huiwen YIN Hongwei JIA dong xu Zhenping LUO Haoyu HE Wanhui YUAN Rui DUAN Yunjiang School of Earth Science and Engineering Nanjing UniversityNanjing 210046China Research Institute of Petroleum Exploration and Development Tarim Oilfield CompanyPetroChinaKorlaXinjiang 841000China

The Kuqa fold-and-thrust belt exhibits apparent structural variation in the western and eastern *** salt layer act as effective decollements and influence the varied *** this study,detailed seismic interpretations and analog modeling are presented to construct the suprasalt and subsalt structures in the transfer zone of the middle Kuqa and investigate the influence of the two salt *** results reveal that the relationship of the two salt layers changes from separated to connected,and then overlapped toward the foreland in the transfer *** structural models are formed in the suprasalt and subsalt units due to the interaction of the two salt *** imbricate thrust faults form two broom-like fault systems in the subsalt *** suprasalt units develop detached folds terminating toward the east in the region near the orogenic ***,two offset anticlines with different trends develop at the frontal edge of the lower salt layer and the trailing edge of the upper salt layer,*** to exploration results in this region,the relationship between suprasalt and subsalt structures has an influence on hydrocarbon *** believe that the connected deformation contains high-risk plays while the decoupled deformation contains well-preserved plays.

关键词： along-strike variation analog modeling 3D geometric model salt-related structure Kuqa fold-and-thrust belt

Cuproptosis mediates copper-induced testicular spermatogenic cell death

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Asian Journal of Andrology 2024年第3期26卷 295-301页

作者： Jing-Yi Zhang xu-Jun Yu Jun-Jun Li Yao Xiao Guang-Sen Li Fang Yang Liang dong Chengdu University of Traditional Chinese Medicine Chengdu 611137China Chengdu Fifth People’s Hospital The Fifth People’s Hospital of Chengdu University of Traditional Chinese MedicineChengdu 611130China TCM Regulating Metabolic Diseases Key Laboratory of Sichuan Province Hospital of Chengdu University of Traditional Chinese MedicineChengdu 610072China Department of Surgery The Reproductive and Women-Children HospitalChengdu University of Traditional Chinese MedicineChengdu 610041China

Cuproptosis,a novel mechanism of programmed cell death,has not been fully explored in the context of spermatogenic *** investigated the potential involvement of cuproptosis in spermatogenic cell death using a mouse model of copper *** male Institute of Cancer Research(ICR)mice were randomly divided into four groups that received daily oral gavage withsodium chloride(control)or copper sulfate(CuSO_(4))at 50 mg kg^(−1),100 mg kg^(−1),or 200 mg kg^(−1),for 42 consecutive *** to copper overload exhibited a disruption in copper ***,significant upregulated expression of keycuproptosis factors was accompanied by a significant rise in the rates of testicular tissue cell *** revealed the presence of ferredoxin 1(Fdx1)in Sertoli cells,Leydig cells,and spermatogenic cells at various stages oftesticular development,and the Fdx1-positive staining area was significantly increased in copper-overloaded *** and decreased adenosine triphosphate levels were also observed,further implicating mitochondrial damage *** analyses revealed pathological lesions and blood−testis barrier destruction in the testicular tissue,accompaniedby decreased sperm concentration and motility,in copper-overloaded *** summary,our results indicate that copper-overloadedmice exhibit copper homeostasis disorder in the testicular tissue and that cuproptosis participates in spermatogenic cell *** findings provide novel insights into the pathogenic mechanisms underlying spermatogenic cell death and provide initialexperimental evidence for the occurrence of cuproptosis in the testis.

关键词： blood−testis barrier cuproptosis ferredoxin 1 spermatogenic cell death

Mechanism of immune tolerance induced by donor derived immature dendritic cells in rat high-risk corneal transplantation

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International Journal of Ophthalmology(English edition) 2013年第3期6卷 269-275页

作者： Xiao-Wei Gao Yan Fu Wen-Jing Li An-Jie Du Xia Li xu-dong Zhao Ophthalmic Center No. 474 Hospital of Chinese PLA Department of Ophthalmology Medical College of Shihezi University

·AIM: To study the role of immature dendritic cells (imDCs) on immune tolerance in rat penetrating keratoplasty (PKP) in high -risk eyes and to investigate the mechanism of immune hyporesponsiveness induced by donor-derived imDCs. ·METHODS: Seventy-five SD rats (recipient) and 39 Wistar rats (donor) were randomly divided into 3 groups: control, imDC and mature dendritic cell (mDC) group respectively. Using a model of orthotopic corneal transplantation in which allografts were placed in neovascularized high -risk eyes of recipient rat. Corneal neovascularization was induced by alkaline burn in the central cornea of recipient rat. Recipients in imDC group or mDC group were injected donor bone marrow-derived imDCs or mDCs of 1 ×10 6 respectively 1 week before corneal transplantation tail vein. Control rat received the same volume of PBS. In each group, 16 recipients were kept for determination of survival time and other 9 recipients were executed on day 3, 7 and 14 after transplantation. Cornea was harvested for hematoxylin eosin staining and acute rejection evaluation, Western blot was used to detect the expression level of Foxp3. ·RESULTS: The mean survival time of imDC group was significantly longer than that of control and mDC groups (all <0.05). The expression level of Foxp3 on CD4 + CD25 + T cells of imDC group (2.24 ±0.18) was significantly higher than that in the control (1.68 ±0.09) and mDC groups (1.46±0.13) (all <0.05).·CONCLUSION: Donor -derived imDC is an effective treatment in inducing immune hyporesponsiveness in rat PKP. The mechanism of immune tolerance induced by imDC might be inhibit T lymphocytes responsiveness by regulatory T cells. ·

关键词： immature dendritic cell high-risk keratoplasty regulatory T cells

Ln2Zr2O7 compounds（Ln=La,Pr, Sm, Y） with varied rare earth A sites for low temperature oxidative coupling of methane

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Chinese Chemical Letters 2019年第6期30卷 1141-1146页

作者： Xiuzhong Fang Lianghui Xia Liang Peng Yuan Luo Junwei xu Luoji xu Xianglan xu Wenming Liu Renyang Zheng Xiang Wang Key Laboratory of Jiangxi Province for Environment and Energy Catalysis College of Chemistry Nanchang University Nanchang 330031 China Research Institute of Processing (RIIP) SINOPEC Beijing 100083 China

With the objective to develop catalysts having application potential for oxidative coupling of methane (OCM) at relatively lower temperature. A series of Ln2Zr2O7 compounds with varied rare earth A sites have been prepared by a co-precipitation method. XRD and Raman have proved that pure Ln2Zr2O7 compounds have been successfully prepared for all the catalysts. By decreasing the rA/rB ratio, their crystalline structure transform from an ordered pyrochlore (La2Zr2O7) to a less ordered pyrochlore (Pr2Zr2O7 and Sm2Zr2O7) and eventually to a defective cubic fluorite phase (Y2Zr2O7). H2-TPR, O2-TPD and XPS have testified that the amount of surface active O2-species follows the order of La2Zr2O7>Pr2Zr2O7>Sm2Zr2O7 > Y2Zr2O7, which is well consistent with the reaction performance, indicating that the abundance of surface O2- sites is a critical factor influencing the reaction performance. CO2-TPD has demonstrated that a better catalyst generally possesses a larger amount of surface moderate alkaline sites, which is another factor to affect the reaction performance. It is concluded that the concerted interaction between the two types of surface active sites controls the reaction performance of the Ln2Zr2O7 catalysts. In comparison with the state-of-the art Mn/Na2WO4/SiO2, La2Zr2O7, the best catalyst, exhibits much improved reaction performance below 750 ℃.

关键词： Pyrochlore compounds Low temperature OCM A site substitution effects Surface superoxide sites Surface alkaline sites

NF_3 decomposition over Al_2O_3 reagents without water

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Journal of Natural Gas Chemistry 2011年第4期20卷 418-422页

作者： Xiufeng xu Liang Sun Yanan Wang School of Chemistry and Biology Yantai University Yantai 264005 Shandong China

Several Al2O3 samples were prepared by a precipitation method coupled with ultrasonic treatment,and NF3 decomposition without water over Al2O3 reagents is carried *** effect of preparation parameters of Al2O3 reagents,such as precipitating agents,structure directing agents,and calcining temperatures on their reactivity for NF3 decomposition has been *** results show that NF3 can be decomposed completely at 400-C,and full conversion of NF3 maintains 580 min over the best Al2O3 reagent,calcined at 600-C which was prepared using both PEG-2000 and Tween-60 as structure directing agents,ammonia as a precipitating agent.

关键词： NF3 decomposition without water Al2O3 preparation parameters reactivity

Controllable preparation of 2D metal-semiconductor layered metal dichalcogenides heterostructures

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Science China Chemistry 2019年第3期62卷 295-298页

作者： Gonglei Shao Yanyan xu Song Liu Institute of Chemical Biology and Nanomedicine (ICBN) State Key Laboratory of Chemo/Biosensing and Chemometrics College of Chemistry and Chemical Engineering College of Biology Hunan University

1 Introduction Graphene is the first demonstration of a truly 2D atomic layer crystal, and has shown various excellent properties (e.g., ultrahigh carrier mobility, superior toughness, unique thermal conductivity, and good optics performance). The family of 2D crystals has grown to include metals (e.g., NbS2, VS2, TaS2), semiconductors (e.g., MoS2, WS2, ZrS2), and insulators (e.g., hexagonal boron nitride (hBN)), many of which are stable at ambient conditions [1]. 2D layered metal dichalcogenides (LMDs) materials [2].

关键词： Introduction Graphene the first demonstration shown

On-board torque management approach to the E-COSM benchmark problem with a prediction-based engine assignment

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Control Theory and Technology 2022年第2期20卷 173-184页

作者： Bo Zhang Jiangyan Zhang Fuguo xu Department of Engineering and Applied Sciences Faculty of Science and TechnologySophia UniversityTokyo 102-8554Japan College of Mechanical and Electronic Engineering Dalian Minzu University.Dalian 116600LiaoningChina

This paper proposes an energy management strategy for the benchmark problem of E-COSM 2021 to improve the energy efficiency of hybrid electric vehicles(HEVs)on a road with a *** assume that HEVs are in a connected environment with real-time vehicle-to-everything information,including geographic information,vehicle-to-infrastructure information and vehicle-to-vehicle *** benchmark problem to be solved is based on HEV powertrain control using traffic information to achieve fuel economy improvements while satisfying the constraints of driving safety and travel *** proposed strategy includes multiple rules and model predictive control(MPC).The rules of this strategy are designed based on external environment information to maintain safe driving and to determine the driving *** improve fuel economy,the optimal energy management strategy is primarily considered,and to perform real-time energy management via RHC-based optimization in a connected environment with safety constraints,a key issue is to predict the dynamics of the preceding vehicle during the targeted ***,this paper presents a real-time model-based optimization strategy with learning-based prediction of the vehicle’s future *** validate the proposed optimization strategy,a powertrain control simulation platform in a traffic-in-the-loop environment is constructed,and case study results performed on the constructed platform are reported and discussed.

关键词： Hybrid powertrain control Connected and automated vehicles Vehicle-to-everything Benchmark problem

Spatial Distribution Characteristics and Influencing Factors of Agricultural Specialized Villages in Guangdong Province,China

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Chinese Geographical Science 2022年第6期32卷 1013-1034页

作者： YANG Ren ZHANG Xin xu Qian School of Geography and Planning Sun Yat-sen UniversityGuangzhou 510006China Land Research Center Sun Yat-sen UniversityGuangzhou 510275China School of Public Administration Guangdong University of Finance&EconomicsGuangzhou 510320China

China is vigorously implementing a rural revitalization strategy with the prosperity of rural industries as the primary *** characteristic economy of’One Village One Product’(OVOP)is particularly significant in promoting rural revitalization and increasing farmers’*** identifying the spatial distribution characteristics and influencing factors of agricultural specialized villages(ASVs)under OVOP provides a preliminary research basis for constructing the theoretical framework of specialization and clustering of rural industrial *** study takes Guangdong Province,China as an example,using kernel density estimation,Ripley’s K function,geometric fractals,principal component regression and other methods to identify the spatial distribution characteristics and influencing factors of *** was found that the ASVs in Guangdong Province are dominated by the planting industry,with an uneven number in space and a multi patch ***,ASVs are mainly distributed in the Chaoshan Plain in the eastern Guangdong,the northern mountainous area of Guangzhou,and the eastern part of Maoming *** spatial distribution mode obeys the aggregation distribution pattern at the scale of province,region and municipality(prefecture-level city).In addition,the formation and development of ASVs are affected by multiple internal and external *** influence of basic factors such as natural environmental conditions is gradually weakening,while the influence of social and economic factors such as market demand is gradually *** study can enrich the research results of ASVs and provide guidance and reference for the long-term and high-quality development of rural industry revitalization.

关键词： One Village One Product(OVOP) agricultural specialization spatial distribution rural industry revitalization