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Effects of exotic species Larix kaempferi on diversity and activity of soil microorganisms in Dalaoling National Forest Park

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Ecological Processes 2015年第1期4卷 118-125页

作者： Fangqing Chen Nina Song Guohua Chen jianzhu wang International Center for Ecological Protection and Management in the Three Gorges Area Hubei ProvinceThe China Three Gorges UniversityDaxue Road 8Yichang 443002Hubei ProvincePeople’s Republic of China Engineering Research Center of the Ministry of Education for the Three Gorges Reservoir Region’s Eco-Environment The China Three Gorges UniversityYichang 443002Hubei ProvincePeople’s Republic of China

Introduction:Soil microbial community plays a crucial role in the ecological processes of soil *** species introduction often changes profoundly soil ecological processes in the *** kaempferi(Lam.)was introduced to China from Japan as a timber tree species in the *** activity and functional diversity of soil microorganisms in the *** forest in Dalaoling National Forest Park in Hubei Province,China,was studied to evaluate the effects of this exotic species on the local soil ***:Quadrates were set up randomly in the *** forests cultivated in 1990 and 1996 and the surrounding Pinus armandii forest cultivated in *** samples were collected using a soil corer at five locations along the diagonals in each *** activity and functional diversity of soil microorganisms were tested using the BIOLOG technique in ***:The diversity,activity,and carbon utilization pattern of soil microorganism community and soil physicochemical properties were all impacted by the introduced *** average well color development(AWCD)and Shannon’s richness index(H)of the soil microorganism community in the *** forest decreased with the increase in forest age and were significantly lower than those in the surrounding native *** *** carbon source utilization pattern of soil microorganism community in a 23-year-old *** forest differed significantly from a 17-year-old *** forest and the *** *** introduced species also resulted in the changes of soil physicochemical *** organic material content,total nitrogen,available nitrogen,and total phosphorus in the soil of *** forest were significantly lower than those in the soil of *** ***:Introduction and long-time cultivation of *** significantly altered the soil microbial functional diversity and activity and the soil physicochemical *** alteration increased

关键词： soil Forest forest

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Preliminary study on the electrocatalytic performance of an iron biochar catalyst prepared from iron-enriched plants

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Journal of Environmental Sciences 2020年第2期32卷 81-89页

作者： Xinqiang Cao Yingping Huang Changcun Tang jianzhu wang David Jonson Yanfen Fang College of Biological and Pharmaceutical Sciences China Three Gorges UniversityYichang 443002China China Engineering Research Center of Eco-environment in Three Gorges Reservoir Region Ministry of EducationChina Three Gorges UniversityYichang 443002China College of Hydraulic and Environmental Engineering China Three Gorges UniversityYichang 443002China

Eichhornia crassipes is a hyperaccumulator of metals and has been widely used to remove metal pollutants from water, but disposal of contaminated plants is *** prepared from plants is commonly used to remediate soils and sequester ***, the catalytic activity of biochar prepared from plants enriched with iron was investigated as a potentially beneficial use of metal-contaminated *** a 30-day hydroponic experiment, *** was exposed to different concentrations of Fe(Ⅲ)(0, 4, 8, 16, 32 and 64 mg/L), and Fe-biochar(Fe-BC) was prepared by pyrolysis of the plant *** biochar was characterized using X-ray diffraction(XRD), scanning electron microscopy(SEM), energy dispersive X-ray spectrometry(EDS), Brunauer–Emmett–Teller(BET) analysis, X-ray photoelectron spectroscopy(XPS) and atomic absorption spectrometry(AAS).The original root morphology was visible and iron was present as γ-Fe2O3 and *** biochar enriched with Fe(Ⅲ) at 8 mg/L(8-Fe-BC) had the smallest specific surface area(SSA, 13.54 m^2/g) and the highest Fe content(27.9 mg/g).Fe-BC catalytic activity was tested in the electrocatalytic reduction of H2O2 using cyclic voltammetry(CV).The largest reduction current(1.82 mA/cm^2) was displayed by 8-Fe-BC, indicating the highest potential catalytic *** report here, for the first time, on the catalytic activity of biochar made from iron-enriched plants and demonstrate the potential for reusing metalcontaminated plants to produce a biochar catalyst.

关键词： Hyperaccumulator Eichhornia crassipes Fe-doped biochar H2O2 electrocatalysis

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Initial response of fish trophic niche to hydrological alteration in the upstream of Three Gorges Dam

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Ecological Processes 2016年第1期5卷 130-138页

作者： jianzhu wang Lei Li Jun Xu Binhe Gu Engineering Research Center of Eco-environment in Three Gorges Reservoir Region Ministry of EducationChina Three Gorges UniversityYichang 443002China Institute of Hydrobiology the Chinese Academy of SciencesWuhanChina Soil and Water Science Department University of FloridaGainesvilleFLUSA

Introduction:Damming is one of the dramatic impacts to river food webs due to habitat fragmentation and changes in the hydrological *** world’s largest dam,the Three Gorges Dam(TGD),has been constructed in the middle of Yangtze River since *** objective of this study was to understand the effects of altered hydrological regime on the trophic structure of fish food web along the hydrological gradient in the ***:Fish samples were collected from an upstream,a midstream and a downstream site of the Yangtze River upstream of the TGD in May and September of *** tissue of each fish species was determined for stable isotopic compositions(δ^(13)C and δ^(15)N)which were used to calculate isotope-based Bayesian community-wide trophic ***:Stable isotope trophic niche analysis reveals reduced utilization of basal resource and trophic niche space at the midstream and downstream *** contrast,community trophic diversity and species redundancy were higher at the downstream than the upstream and midstream,likely as the result of reduced the spectrum of basal *** findings suggested that the negative impacts on the overall trophic niche space from reduced flow,increased water depth and stagnancy occurred only one year after the completion of the ***:Altered hydrological regimes posed multiple impacts to the aquatic food *** flow and increased water depth within TGD has posed initial effects to the fish community trophic *** collections ana analysis of ecological data to compare the fish trophic structure revealed in this study are needed to assess the long-term impacts of TGD on fish community structure and resources utilization.

关键词： Three Gorges Dam(TGD) Fish δ^(13)C δ^(15)N Trophic niche Yangtze River

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Finite Element Analysis on Thermal Stress of SEN

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China's Refractories 2015年第2期24卷 51-54页

作者： wang jianzhu ZHAO Junxue School of Metallurgical Engineering Xi'an University of Architecture and Technology State Key Laboratory of New Technology of Iron and Steel Metallurgy University of Science and Technology Beijing

Thermal stress of SEN was studied by using finit element analysis（ FEA）. The results disclose：（ 1） fo the tapered zone of SEN,the thermal stress reaches it peak after casting for about 30 s,at this moment,th axial stress is the largest,the circumferential stress come the second and the radial stress is the smallest;（ 2）when SEN suffers the thermal stress,the inner wall suf fers the pressure stress,and the shorter the distance from the inner wall is,the larger the pressure stress is; th outer wall suffers the tensile stress and the shorter the dis tance from the outer wall is,the larger the tensile stres is; the axial stress holds a dominant position in the ta pered zone,while the circumferential stress takes the lead in the cylindrical zone;（ 3） as angle α of SEN’s taper ed zone increases, the thermal stress grows obviousl when α is larger than 110°; while the thermal stress re duces obviously,when α is larger than 140°; thus,fo SEN design,it is essential to avoid the interval of α =110°- 140°.

关键词： submerged entry nozzle thermal stress finite element method tapered zone

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Numerical investigation on dynamic characteristics of flow field in cyclone separators with different dust hopper structures

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Particuology 2023年第11期82卷 134-145页

作者： Liyun Zhu Sen wang Yi Ru jianzhu wang Pengju Yang Anjun Li Zhenfei Ma Zhenbo wang College of New Energy State Key Laboratory of Heavy Oil ProcessingChina University of Petroleum(East China)Qingdao266580China Hualu Engineering&Technology Co. LtdXi'an710065Shaanxi ProvinceChina

The dynamic characteristics of flow field in cyclone separators with different dust hopper structures were studied by coupling Reynolds Stress Model(RSM)and Lagrangian Particle Tracking(LPT)*** characteristic frequencies of cylinder section,cone section and dust hopper were calculated as f_(1)=53 Hz,f_(2)=65 Hz,and f_(3)=8 Hz by using Fast Fourier Transform(FFT)method,*** on the effects of f3 on the motion of vortex,the separated space was divided into none affected region,weakly affected region,and strongly affected *** characteristic frequency of dust hopper increased with the decrease of dust hopper diameter,while it was independent of the *** dust hopper with d=1.5D(model D3)and h=1.5D(model H3)can significantly decrease the effect of back-mixing on the motion of inner vortex,which is beneficial to improve the efficiency of cyclone separator.

关键词： Cyclone separator Dusthopper structures Precessingvortexcore Time-frequencyanalysis Numerical simulation

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Environmental stress and eutrophication in freshwater wetlands: evidence from carbon and nitrogen stable isotopes in cattail (Typha domingensis Pers.)

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Ecological Processes 2019年第1期8卷 383-390页

作者： Ziye Zheng Yahong Xu jianzhu wang Yuncong Li Binhe Gu Engineering Research Center of Eco-environment in Three Gorges Reservoir Region Ministry of EducationChina Three Gorges UniversityYichang 443002China Tropical Research and Education Center University of Florida18905 SW 280th St.HomesteadGainesvilleFL 33031USA Soil and Water Science Department University of Florida106 Newell HallGainesvilleFL 32611USA

Background:Florida’s Everglades is a vast freshwater peatland that has been impacted by the alterations of hydrological pattern and water quality which led to changes in plant species composition and *** this study,carbon and nitrogen stable isotopes(δ13C andδ15N)in cattail(Typha domingensis)are evaluated as indicators of environmental changes in the Everglades wetlands along nutrient and hydrological gradients represented by reference sites with total phosphorus(TP)<10μg L−1,transition sites with TP≥10μg L−1<20μg L−1 and impacted sites with TP≥20μg L−1 which differed in hydrology or habitats(marsh and canal).Results:Cattailδ13C values decreased significantly from reference(–24.1‰),transition(–26.8‰)to the impacted sites(–28.2‰).In contrast,δ15N values increased significantly from reference(–5.2‰),transition(2.4‰)to the impacted site(5.9‰).In response to a poor hydrological condition,cattail in marsh area displayed 13C enrichment(–26.0‰)and 15N depletion(0.2‰).By contrast,cattail grown in the canal sites with favorable hydropattern displayed 13C depletion(–27.6‰)and 15N enrichment(5.9‰)from the canal sites with more favorable hydrological ***:The different patterns for the changes inδ13C andδ15N in cattail suggested that increased nutrients led to increased stomatal conductance and 13C fractionation during carbon uptake and decreased 15N fractionation with increasing nitrogen demand while poor hydrological condition coupled with low nutrients led to reduced plant growth indicated by higherδ13C and lowerδ15N *** from this study suggested thatδ13C in emerged macrophytes such as cattail can be used as an indicator for environmental stress whileδ15N is a robust indicator for wetland eutrophication.

关键词： Cattail Eutrophication Everglades Nutrient gradient Phosphorus enrichment Stable isotopes Wetlands

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Effect of Cynodon dactylon community on the conservation and reinforcement of riparian shallow soil in the Three Gorges Reservoir area

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Ecological Processes 2015年第1期4卷 29-36页

作者： Fangqing Chen Jinxia Zhang Miao Zhang jianzhu wang Engineering Research Center of the Ministry of Education for the Three Gorges Reservoir Region’s Eco-environment The China Three Gorges UniversityDaxue RoadYichang 443002People’s Republic of China

Introduction:Riparian vegetation plays a crucial role in soil conservation and riverbank *** Three Gorges hydrologic project has significantly changed the pattern of water-level fluctuation and riparian environment,which significantly influenced plant community development and its effect on soil conservation and riverbank *** dactylon,a perennial grass with developed root system and creeping stems,has become a dominant riparian species in the Three Gorges area after the completion of the *** aimed to characterize how the soil-root system under the *** community responded to environmental changes and effects of the soil-root system on shallow soil conservation and riverbank reinforcement through field investigation and laboratory ***:We conducted a field survey and experimental *** of a natural *** community were set up on a riverbank along an altitude *** were sampled randomly for the measurements of spatial structure and tensile strength of *** erosion resistance,soil scour resistance,and shear strength of sampled soil-root systems and control soil were tested in the ***:Roots of the *** community significantly increased soil erosion resistance,soil scour resistance,and shear strength,enhancing the stability of shallow soil and *** to water-level fluctuation,*** at lower altitudes was subjected to less time exposed to *** a result,the soil-root systems at lower altitudes were characterized by reduced biomass with reduced capacity for soil reinforcement as measured through erosion resistance,soil scour resistance,and shear *** correlation analysis indicated that root biomass had a significant positive linear correlation with the enhancement of erosion resistance and scour resistance,and shear strength,***:Roots of the *** community effectively enhanced the stability of riparian shallow soil and riverb

关键词： soil shallow altitude

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非洲英属殖民地的城市规划实践:1851—1960年的港口之城拉各斯

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国际城市规划 2018年第3期33卷 125-132页

作者：王建竹清华大学建筑学院城乡规划系

关于撒哈拉以南非洲殖民城市规划的研究仅限于个别英文文献,而殖民时期的空间政策或是其略作修改的版本仍主导着当前非洲的空间发展计划,倘若没有对殖民空间政策和目标的充分认识,这些空间发展的尝试与努力将难以获得成功。本文以撒哈... 详细信息

关于撒哈拉以南非洲殖民城市规划的研究仅限于个别英文文献,而殖民时期的空间政策或是其略作修改的版本仍主导着当前非洲的空间发展计划,倘若没有对殖民空间政策和目标的充分认识,这些空间发展的尝试与努力将难以获得成功。本文以撒哈拉以南非洲第一大城市,也是殖民时期英国在西非最重要的殖民城市——拉各斯为例,对19世纪中叶—20世纪中叶非洲英属殖民地的城市规划进行探讨。文章阐述了殖民时期的城市发展过程、主要空间政策与规划实践,并结合欧洲殖民主义的意识形态和统治方式分析了殖民城市规划的历史和哲学基础,最后对殖民城市规划和殖民现代性进行了反思。

关键词：殖民城市城市规划殖民现代性拉各斯非洲

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Research and Practice of Cardiopulmonary Rehabilitation Training Programs

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World Journal of Cardiovascular Diseases 2024年第9期14卷 557-566页

作者： Na Yan Maiding He Jinyue Jiang Juan Luo Ping Zhan Xichan wang Xia Gao jianzhu wang Na Yin Fang Ye Jinghua Yu Shiying Zhang Rehabilitation Medicine Qujing No. 1 Hospital Qujing China Rehabilitation Medicine Qujing Multi-Rehabilitation Hospital Qujing China

In today’s society, the incidence of cardiopulmonary diseases is increasing annually, seriously affecting patients’ quality of life. Therefore, developing a scientific and effective rehabilitation training program is of great significance. This study first analyzes the theoretical basis of cardiopulmonary rehabilitation training, including the effects of aerobic exercise, interval training, and strength training on cardiopulmonary function. Based on this, a comprehensive rehabilitation training program is designed, which includes personalized training plans, comprehensive interventions, multidisciplinary collaboration, patient education, and regular follow-up visits. The cardiopulmonary rehabilitation training plan developed in this study has certain scientific practicability, which provides a theoretical basis for cardiopulmonary rehabilitation training, and also provides a reference for medical institutions, rehabilitation centers and communities, which is helpful for promotion and application to a wider range of patients with cardiopulmonary diseases.

关键词： Cardiopulmonary Function Rehabilitation Training Program Aerobic Exercise Interval Training

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The Neuroprotective Effect of Buyang Huanwu Decoction on Rat Ischemic/Reperfusion Brain Damage by Promoting Migration of Neural Stem Cells

The Neuroprotective Effect of Buyang Huanwu Decoction on Rat...

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第十四届全国中药和天然药物学术研讨会

作者： Xiangying Kong Xiaohui Su Jia Zhu jianzhu wang Hongye Wan Li Li Na Lin Institute of Chinese Materia Medica China Academy of Chinese Medical Sciences wangJing Hospital of China Academy of Chinese Medical Sciences

Buyang Huanwu Decoction(BYHWD)is a classic formula widely used for treating stroke-induced disability,the highest morbidity of neurological disorders in ***,the mechanism of its neuroprotection has not been fully *** reports indicated that it may promote growth and differentiation of neural stem cells(NSCs).The present

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