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Spatial distributions of soil nutrients affected by land use,topography and their interactions,in the Loess Plateau of china

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International Soil and Water Conservation Research 2024年第1期12卷 227-239页

作者： Wenxin Zhou Changjia li Wenwu zhao lindsay C.Stringer Bojie Fu State Key Laboratory of Earth Surface Processes and resource Ecology Faculty of Geographical ScienceBeijing Normal UniversityBeijingChina Institute of Land Surface System and Sustainable Development Faculty of Geographical ScienceBeijing Normal UniversityBeijingChina Department of Environment and Geography University of YorkYorkUK York environmental Sustainability Institute University of YorkYorkUK

Soil nutrient availability and their spatial distributions are strongly related to land use and landscape *** study aims to address the knowledge gap regarding the interaction between these factors and the underlying *** selected five land uses(grassland with Artemisia gmelinii,woodland with Robinia pseudoacacia,shrubland with Caragana korshinskii and Hippophae rhamnoides,and apple orchard with Malus pumila)and nine slope positions across hillslopes in the Loess Plateau,china,to investigate their combined effects on the contents and stocks of soil organic carbon(SOC),total nitrogen(TN)and total phosphorus(TP).Parametric and non-parametric statistical tests were conducted to determine the significant differences in the means or the medians of the soil nutrient *** showed that the SOC and TN contents of shrubland with Caragana korshinskii were statistically significantly greater than those of the grassland(plights that land use,slope position and their interaction have significant effects on the spatial distributions of soil *** provides essential empirical evidence for the identification of the optimal vegetation type and slope positions in land management and vegetation restoration activities.

关键词： Soil organic carbon Total nitrogen Total phosphorus Slope position Vegetation restoration

Photocatalytic in situ H_(2)O_(2) production and activation for enhanced ciprofloxacin degradation over CeO_(2)-Co_(3.O_(4)/g-C_(3.N_(4):key role of CeO_(2)

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Rare Metals 2024年第6期43卷 2695-2707页

作者： Hong-Jie Zhu Yi-Kai Yang Ming-Hui li Lu-Ning Zou Hai-Tao zhao Shandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology School of Chemistry and Chemical Engin College of Ecology and Environment Anhui Normal UniversityWuhu241002China liaocheng YiLu Advanced Materials Co. LtdLiaocheng 252000China

The abused ciprofloxacin antibiotics have caused significant environmental *** oxidative degradation of ciprofloxacin exhibits promising efficacy,it often entails excessive energy ***,it is necessary to explore an effective and ecologically sustainable degradation ***,we demonstrated that g-C_(3.N_(4) decorated with the coordinated CeO_(2)and Co_(3.O_(4)(CeO_(2)-Co_(3.O_(4)/CN)exhibited effective ciprofloxacin photodegradation via in situ H_(2)O_(2) production and activation *** indicate that the introduced CeO_(2) enhances the transference of photogenerated electrons to O_(2) by adjusting the oxygen vacancy of photocatalyst,thereby increasing the generation of superoxide radicals,which in turn generate H_(2)O_(2),resulting in a 22.4-fold increase in H_(2)O_(2) generation over g-C_(3.N_(4).Moreover,the in situ H_(2)O_(2)generation facilitated by CeO_(2) is confirmed to be essential for ciprofloxacin degradation via CeO_(2)-Co_(3.O_(4)/CN,as it provides enough oxidant for Co_(3.O_(4) to activate into hydroxyl radicals for the pollutants ***,CeO_(2)-Co_(3.O_(4)/CN achieves a ciprofloxacin degradation ratio of 97.7%within 80 *** study introduces a novel approach that combines H_(2)O_(2) generation and activation,offering an innovative perspective for achieving clean and efficient purification of antibiotic-contaminated water.

关键词： CeO_(2) In situ H_(2)O_(2)generation Ciprofloxacin degradation Photocatalyst

A 2500-year sea level change record in Fildes Peninsula, Antarctica

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Progress in Natural Science:Materials International 2004年第8期 65-67页

作者： zhao ye*(Department of resource and {3. sciences Key Laboratory of {3. Change and Natural Disaster, Ministry of Education of china, Beijing normal university, Beijing 100875, china) Department of resource and environmental sciences Key Laboratory of environmental Change and Natural Disaster Ministry of Education of China Beijing Normal University Beijing 100875 China

A detailed record of sea level changes during the last 2500 years is preserved in the northernwest coast of Fildes Peninsula in Antarctica. Fourteen marine alga layers were deposited in the beach with an altitude of 2.80 m, and one diatom layer deposited in the ancient lake on the terrace with an altitude of 6.84 m. A radiocarbon age of 695±70 aBP was obtained for the modern marine alga, and the age was used in correction for the carbon reservoir effect of the marine alga. Sea level fell 4.98 m from the 4th century B.C. to the early 13.h century, at an average of -0.3. cm/a, then rose about 0.78 m during the early 13.h to the middle 18th century, at an average of 0.14 cm/a. It has risen about 0.16 m since the middle 18th century, at an average of 0.07 cm/a.

关键词： Antarctica Fildes Peninsula Late Holocene sea level changes.

Human impacts on the terrestrial ecosystem of Fildes Peninsula of King George Island, Antarctica

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Journal of environmental sciences 2000年第1期12卷 14-19页

作者： zhao ye\+1, XU Cui\|hua\+2 (1. Institute of resource and {3. sciences, Beijing normal university, Beijing 100875, china 2. Laboratory of Industrial Hygiene, Ministry of Public Health, Beijing 100088, china) Foundation item: National Natur

Antarctic environment has valuable baseline information for understanding the global change. The objectives of this study were to investigate the impacts of human activities on Antarctic terrestrial ecosystem. Based on the investigation results and the sampling analysis of the environment of Fildes Peninsula, King George Island, Antarctica, it was shown that there are some artificial radioactive elements—? ? 13. Cs in Antarctic environment: the radioactivity of 13. Cs in the surface soil, the surface moss, the fruticose lichen and the crustaceous lichen are 6 00—14 80, 25 07, 29 04 and 58 07 Bq/kg separately; i.e. the sequence of 13. Cs specific activity is as follows: crustaceous lichen>fruticose lichen>surface moss>surface soil, which demonstrates that the crustaceous lichen is one of the most sensitive monitor ways for the effect of the long term diffusion of 13. Cs. The impacts of the scientific research activities on the partial ecosystem of Fildes Peninsula include: the changes of the landscape and the soil material have made a strong freezing thawing process, which decreases the stability of the ground surface, causes the degradation of the vegetation in the some small areas; some small lakes, runoff and lichens in middle areas of Fildes Peninsula have been affected by the wastes of the stations, in the surrounding areas of the expedition stations, the concentration of Cr, Cu, Ni, Pb and Zn in the lichen and the water are higher than that of the contrasting area. Fildes Peninsula is one of the most crowded areas of expedition stations, at some extent, the environment and terrestrial ecosystem have been affected by the human activities. The conservation of the environment and ecosystem should be an important aspect of Antarctic environmental sciences.

关键词： Antarctica Fildes Peninsula terrestrial ecosystem human impacts CLC number: X21 Document code: A

High-efficiency Ce-modified ZSM-5 nanosheets for waste plastic upgrading

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Nano Research 2024年第6期17卷 5645-5650页

作者： Xiaomei Wang Xueting Wu Meng zhao Rui Zhang Zijian Wang Yuou li liangliang Zhang Xiao Wang Shuyan Song Hongjie Zhang State Key Laboratory of Rare Earth resource Utilization Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun 130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei 230026China Department of Chemistry Tsinghua UniversityBeijing 100084China

Zeolite-based catalyst hydrocracking of plastics is a potential strategy for mitigating the environmental impacts of plastic wastes and recycling valuable {3.s,but difficult mass transfer,low concentration of acid sites,and high cost are still barriers to their practical *** this paper,we report an excellent hydrocracking catalyst of ZSM-5 nanosheets(Ce/b-ZSM-5)modified by Ce species with high conversion up to 96.3.,C_(3.−C_(5)selectivity up to 80.9%,and good stability during the hydrogenation of low-density *** comprehensive studies,b-ZSM-5 shows higher molecular diffusion efficiency and acid site concentrations compared with normal ZSM-5(n-ZSM-5)and hollow ZSM-5(h-ZSM-5).The introduction of Ce species into b-ZSM-5 further increases the density of Brønsted(B)and Lewis(L)acid sites as active sites,which enhances the adsorption of substrates and facilitates the formation of intermediates and desorption of *** a result,the hydrocracking activity of Ce/b-ZSM-5 is significantly improved.

关键词： rare earth zeolite plastic degradation catalytic hydrocracking morphology acidic site

A human-specific insertion promotes cell proliferation and migration by enhancing TBC1D8B expression

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Science china(life sciences) 2024年第4期67卷 765-777页

作者： Hui zhao lin-lin liu Jian Sun lian Jin Hai-Bing Xie Jian-Bo li Hui Xu Dong-Dong Wu Xiao-lin Zhuang Min-Sheng Peng Ya-Jun Guo Wei-Zhu Qian Newton OOtecko Wei-Jie Sun liang-Hu Qu Jie He zhao-li Chen Rong liu Ce-Shi Chen Ya-Ping Zhang State Key Laboratory for Conservation and Utilization of Bio-resource School of Life SciencesSchool of Ecology and Environmental ScienceYunnan UniversityKunming 650091China School of Forensic Medicine Kunming Medical UniversityKunming 650500China Academy of Biomedical Engineering Kunming Medical UniversityKunming 650500China The Third Affiliated Hospital Kunming Medical UniversityKunming 650118China Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of sciences and Yunnan Province Kunming Institute of ZoologyChinese Academy of SciencesKunming 650201China State Key Laboratory of Genetic resources and Evolution Yunnan Laboratory of Molecular Biology of Domestic AnimalsKunming Institute of ZoologyChinese Academy of SciencesKunming 650201China The Key Laboratory of Gene Engineering of the Ministry of Education State Key Laboratory for BiocontrolSun Yat-sen UniversityGuangzhou 510275China National Engineering Research Center for Antibody Medicine and Shanghai Key Laboratory of Cell Engineering and Antibody Shanghai 201203China Department of Thoracic Surgery Cancer Institute and HospitalChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijing 100730China

Human-specific insertions play important roles in human phenotypes and *** we reported a 446-bp insertion(Insert-446)in intron 11 of the TBC1D8B gene,located on chromosome X,and traced its origin to a portion of intron 6 of the EBF1 gene on chromosome ***,Insert-446 was present in the human Neanderthal and Denisovans genomes,and was fixed in humans after human-chimpanzee *** have demonstrated that Insert-446 acts as an enhancer through binding transcript factors that promotes a higher expression of human TBC1D8B gene as compared with orthologs in *** addition,over-expression TBC1D8B promoted cell proliferation and migration through“a dual finger”catalytic mechanism(Arg53. and Gln573.in the TBC domain in vitro and knockdown of TBC1D8B attenuated tumorigenesis in *** of Insert-446 prevented cell proliferation and migration in cancer and normal *** results reveal that the human-specific Insert-446 promotes cell proliferation and migration by upregulating the expression of TBC1D8B *** findings provide a significant insight into the effects of human-specific insertions on evolution.

关键词： human-specific insertion enhancer gene expression cell proliferation and migration

场地土壤镉污染排放清单与溯源——以铜冶炼厂为例

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中国环境科学 2024年第8期44卷 4462-4474页

作者：盛溢薛玮真应迪文吴骏李晔史沛丽赵玲浙江工业大学化学工程学院浙江杭州310014 上海交通大学环境科学与工程学院上海200240 华东师范大学地理信息科学教育部重点实验室上海200241 生态环境部土壤与农业农村生态环境监管技术中心北京100012

以华东地区某铜冶炼厂为例,采用“四大排放途径”函数定量描述Cd通过“废气沉降、废水排放、固废淋滤、跑冒滴漏”进入土壤的通量.结合AERMOD废气沉降模型,计算废气携带的Cd沉降于场地边界内部和外部的分布,明确各途径对场地内土壤Cd污... 详细信息

以华东地区某铜冶炼厂为例,采用“四大排放途径”函数定量描述Cd通过“废气沉降、废水排放、固废淋滤、跑冒滴漏”进入土壤的通量.结合AERMOD废气沉降模型,计算废气携带的Cd沉降于场地边界内部和外部的分布,明确各途径对场地内土壤Cd污染的贡献.结果表明,企业在2000~2002年在产期间主要通过废气(1411kg,50.05%)和固废淋滤(13.7kg,47.05%)排放Cd,而废水及跑冒滴漏途径影响很小(共81.74kg,2.90%).但所排废气中的Cd沉降于场地内的仅0.68kg(0.05%),场地内土壤Cd主要由固废淋滤途径贡献.空间排放清单显示其主要分布于堆料区和废气处理区等生产区域.研究结果对加强冶炼行业的精细化源头管控有重要指导作用,且本文提出的方法可拓展至其他行业和多种污染物的排放量溯源.

关键词：土壤镉污染废气沉降模型固废淋滤空间排放清单源头管控

Blocking the PD-1 signal transduction by occupying the phosphorylated ITSM recognition site of SHP-2

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Science china life sciences 2024年

作者： Wenjie li Wenyi Mei Hewei Jiang Jie Wang Xiaoli li lina Quan Yanyan Diao Yanni Ma Sisi Fan Zhuwei Xie Mengdie Gong Huan Zhu Dewen Bi Feng Zhang Lei Ma Jian Zhang Yufeng Gao Aris Paschalidis Honghuang lin Fangfang liu Kangdong liu Mingliang ye Zhenjiang zhao Yajun Duan Zhuo Chen Yufang Xu Weilie Xiao Shengce Tao lili Zhu Honglin li Innovation Center for AI and Drug Discovery East China Normal University Shanghai Key Laboratory of New Drug Design School of PharmacyEast China University of Science&Technology Shanghai Center for Systems Biomedicine Key Laboratory of Systems Biomedicine (Ministry of Education)Shanghai Jiao Tong University lingang Laboratory Key Laboratory of Medicinal Chemistry for Natural resource Ministry of EducationYunnan Characteristic Plant Extraction LaboratoryYunnan Provincial Center for Research&Development of Natural ProductsState Key Laboratory for Conservation and Utilization of Bio-Resources in YunnanSchool of Pharmacy and School of Chemical Science and TechnologyYunnan University CAS Key Laboratory of Separation sciences for Analytical Chemistry National Chromatographic R&A CenterDalian Institute of Chemical PhysicsChinese Academy of Sciences Department of Cardiology The First Affiliated Hospital of USTCDivision of Life Sciences and MedicineUniversity of Science and Technology of China Department of Infectious Diseases The First Affiliated Hospital of Anhui Medical University Department of Medicine University of Massachusetts Chan Medical School Department of Pathophysiology School of Basic Medical SciencesAcademy of Medical ScienceCollege of MedicineZhengzhou University

Targeting the PD-1/PD-L1 axis with small-molecular inhibitors is a promising approach for immunotherapy. Here, we identify a natural pentacyclic triterpenoid, Pygenic Acid A(PA), as a PD-1 signaling inhibitor. PA exerts anti-tumor activity in hPD-1 knock-in C57BL/6 mice and enhances effector functions of T cells to promote immune responses by disrupting the PD-1 signaling transduction. Furthermore, we identify SHP-2 as the direct molecular target of PA for inhibiting the PD-1 signaling transduction. Subsequently, mechanistic studies suggest that PA binds to a new druggable site in the phosphorylated PD-1 ITSM recognition site of SHP-2, inhibiting the recruitment of SHP-2 by PD-1. Taken together, our findings demonstrate that PA has a potential application in cancer immunotherapy and occupying the phosphorylated ITSM recognition site of SHP-2 may serve as an alternative strategy to develop PD-1 signaling inhibitors. In addition, our success in target recognition provides a paradigm of target identification and confirmation for natural products.

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重庆市铁山坪针叶林和观音桥阔叶林的降水化学特征

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西南师范大学学报（自然科学版） 2004年第6期29卷 1019-1022页

作者：吕旭晨赵大为张冬保叶堤李旭光西南师范大学生命科学学院重庆市环境科学研究院重庆400200 重庆大学城市建设与环境工程学院重庆400045 重庆市环境科学研究院重庆大学城市建设与环境工程学院

研究并比较了重庆市铁山坪马尾松和观音桥樟树降水的化学特征,分析了大气降水的化学物质输入及其降水淋溶对森林生态系统物质循环产生的影响,并对各种离子组分的来源进行了初步解析.结果表明:针叶林穿透水有进一步酸化趋势,而阔... 详细信息

研究并比较了重庆市铁山坪马尾松和观音桥樟树降水的化学特征,分析了大气降水的化学物质输入及其降水淋溶对森林生态系统物质循环产生的影响,并对各种离子组分的来源进行了初步解析.结果表明:针叶林穿透水有进一步酸化趋势,而阔叶林可以减缓酸化作用.大气降水和穿透水是养份输入的主要形式,其中以穿透水养份输入为主.穿透水中N元素可能被吸收,其它营养元素则主要来自干沉降洗脱和植被的淋溶.

关键词：穿透水阔叶林针叶林酸化作用水养马尾松淋溶降水化学离子组分大气降水