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Distribution and mapping of temperate savanna in the sandy lands of eastern China

Science China Earth Sciences 2025年第1期68卷 128-141页

作者： Xiaoya LI Feng WANG Tao DUAN Kaijie YANG Bin YANG Chunmei WANG Xin TIAN Qi LU Institute of Ecological Conservation and Restoration Institute of Desertification Studies Chinese Academy of Forestry Institute of Desertification Institute of Desertification Studies Chinese Academy of Forestry Institute of Great Green Wall Satellite Application Centre for Ecology and Environment MEE Institute of Microelectronics Chinese Academy of Sciences Aerospace Information Research Institute Chinese Academy of Sciences Institute of Forest Resource Information Techniques Chinese Academy of Forestry

Savannas are distributed globally across various *** perform a significant socioeconomic role in regulating net primary productivity and the terrestrial carbon *** to the high spatial heterogeneity induced by the mixed distribution of trees and grasses,current global land-cover classification maps often classify savannas as forests or grasslands Temperate savannas in China cover a vast area,yet their spatial patterns and extent remain poorly *** study developed a novel remote sensing temperate savannas mapping method by integrating very high-resolution （VHR） unmanned aerial vehicle （UAV） and GF-6 satellite imagery based on the vegetation structure characteristics of temperate savannas using the FAO definition of *** and validation datasets were collected from VHR UAV imagery covering the main temperate savannah types with a ground area of 1818 *** fractional woody vegetation cover （FWVC） and fractional herbaceous vegetation cover （FHVC） in temperate savannas were estimated by integrating Classification and Regression Tree and Random Forest *** current distribution of temperate savannas in the Horqin and Otindag Sandy Lands of Eastern China was mapped to a unit area of 0.5 *** root-mean-square error （RMSE） values for the FWVC and FHVC models were 10.69% and 11.67%,and the R2values were 0.66 and 0.63,*** assessment indicated that the new temperate savanna map had high identification accuracy,with a Kappa coefficient of 0.70,overall accuracy of 0.88,and average accuracy of *** savannas in the sandy lands of eastern China were primarily distributed in the northern Horqin Sandy Land the central and eastern regions of the Otindag Sandy Land,and the transition zone from the southern slopes of the Greater Khingan Mountains to the plains,covering a total area of 3.27×10～6 *** main savannah types were elm,oak/maple,and shrub *** savannas were widely distributed in the Otindag Sandy

关键词： Temperate savanna UAV imagery GF-6 Fractional woody vegetation cover Fractional herbaceous vegetation cover Machine learning

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Advances in genotypic antimicrobialresistance testing: a comprehensive review

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Science China Life Sciences 2025年第1期68卷 130-143页

作者： Boheng Duan Xianjun Zeng Junping Peng Huan Kui College of Nanchang University Department of Imaging The Second Affiliated Hospital of Nanchang University NHC Key Laboratory of Systems Biology of Pathogens National Institute of Pathogen BiologyChinese Academy of Medical Sciences & Peking Union Medical College Key Laboratory of Respiratory Disease Pathogenomics Chinese Academy of Medical Sciences & Peking Union Medical College Key Laboratory of Pathogen Infection Prevention and Control (Ministry of Education) State Key Laboratory of Respiratory Health and MultimorbidityNational Institute of Pathogen BiologyChinese Academy of Medical Sciences & Peking Union Medical College

Antimicrobial resistance(AMR) represents a substantial threat to global public health, complicating the treatment of common infections and leading to prolonged illness and escalated healthcare expenses. To effectively combat AMR, timely and accurate detection is crucial for AMR surveillance and individual-based therapy. Phenotypic antibiotic resistance testing(AST) has long been considered the gold standard in clinical applications, serving as the foundation for clinical AMR diagnosis and optimized therapy. It has significantly contributed to ensuring patients′ health and the development of novel antimicrobials. Despite advancements in automated culture-based AST technologies,inherent limitations impede the widespread use of phenotypic AST in AMR surveillance. Genotypic AST technologies offer a promising alternative option, exhibiting advantages of rapidity, high sensitivity, and specificity. With the continuous advancement and expanding applications of genotypic AST technologies, such as microfluidics, mass spectrometry, and high-resolution melting curve analysis, new vigor has been injected into the development and clinical implementation of genotypic AST technologies. In this narrative review, we discuss the principles, applications, and advancements of emerging genotypic AST methods in clinical settings. The comprehensive review aims to highlight the significant scientific potential of emerging genotypic AST technologies in clinical AMR diagnosis, providing insights to enhance existing methods and explore novel approaches.

关键词： antimicrobial resistance (AMR) genotypic antibiotic resistance testing (AST) AST technologies review

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Spatiotemporal evolution of wildfire activity during the PaleoceneEocene Thermal Maximum in China

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Science China Earth Sciences 2025年

作者： Xueting WANG Zuoling CHEN Linlin CUI Xu WANG State Key Laboratory of Lithospheric and Environmental Coevolution Institute of Geology and Geophysics Chinese Academy of Sciences University of Chinese academy of Sciences College of Earth and Planetary Sciences Institute of Geology and Geophysics Chinese Academy of Sciences

The Paleocene-Eocene Thermal Maximum（PETM） was the most prominent warming event in the Cenozoic and serves as a geological analog for the current global warming driven by anthropogenic CO2emissions from burning fossil *** a primary disruptor of Earth's ecosystems, wildfire activity affects the balance of ecosystems, the global carbon cycle, and climate change. Therefore, studying the evolution and driving mechanisms of wildfires during the PETM is essential for predicting wildfire activity under global warming scenarios and for understanding the carbon cycle in the context of wildfire disturbances. Current research on wildfires during the PETM has mainly focused on the Northern Hemisphere, particularly Europe and North America, whereas studies on Chinese mainland remain limited. In this study, we analyzed black carbon（BC）concentration and carbon isotope(δ13C) in the Beigou section of the Nanyang Basin and the Xilutian section of the Fushun Basin to reconstruct the spatiotemporal evolution of wildfires in arid/semi-arid and humid zones. We integrated these findings with those of previous studies on the paleoclimate of the research area to elucidate the driving mechanisms behind wildfire occurrences. Our results indicate that wildfire activity weakened at the onset of the PETM, with the negative carbon isotope period characterized by low wildfire activity, except for a brief resurgence in the Nanyang Basin. During the recovery phase of the PETM, wildfire activity gradually increased, returning to the pre-PETM levels. The prolonged low wildfire state was likely caused by extremely high temperatures and precipitation as well as the resulting vegetation succession. During the PETM recovery phase, increased wildfire activity transformed “short-term carbon sinks” of the biological-atmospheric carbon cycle into “long-term carbon sinks” through the burial of BC. This process of carbon sink conversion may have acted as a negative feedback mechanism, contributing to carbo

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The renaissance of oxo synthesis: heterogeneous Rh-catalyzed hydroformylation

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Science China Chemistry 2025年

作者： Tao Yan Zhi Cao State Key Laboratory of Coal Conversion Institute of Coal Chemistry Chinese Academy of Sciences University of Chinese academy of Sciences National Energy Center for Coal to Clean Fuels Synfuels China Technology Co. Ltd.

Hydroformylation could convert olefins and syngas （mixture of H2and CO） into aldehydes with a great atomic *** transformation serves as one of the most prominent processes in modern chemical industry, as it provides over 10million tons of aldehydes as feedstock for our daily essential products such as plasticizers, paints, solvents, and pharmaceuticals. This process generally requires efficient yet robust catalyst to realize decent efficacy. Compared with metals such as Co, Ru, and Pd, rhodium （Rh）-based catalysts stand out due to its superior activity even under mild reaction conditions, and dominate over 70%of global hydroformylation processes.

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Trends and Distribution of Infertility—Asia Pacific Region,1990–2021

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China CDC weekly 2024年第28期6卷 689-694页

作者： Yanan Luo Chenlu Hong Huiyun Fan Yujie Huang Panliang Zhong Yihao Zhao Xiaoying Zheng APEC health Science academy Peking UniversityBeijingChina Institute for global health and Development Peking UniversityBeijingChina Department of global health School of Public HealthPeking UniversityBeijingChina School of Population Medicine and Public health Chinese Academy of Medical Sciences/Peking Union Medical CollegeBeijingChina

What is already known about this topic?Infertility represents a significant global public health concern,impacting approximately 15%of couples of reproductive age *** this,data on infertility prevalence in the demographically diverse Asia-Pacific region remains *** is added by this report?This study examines the trends and distribution of infertility in the Asia-Pacific region from 1990 to 2021,revealing a significant increase in female *** growth rate of secondary infertility has exceeded that of primary ***,an increase in the prevalence of polycystic ovary syndrome(PCOS)may be a significant *** research also highlights geographical variations in the prevalence and trends of infertility across different *** are the implications for public health practice?The findings emphasize the significance of sexual and reproductive health services and rights in safeguarding fertility.

关键词： prevalence infertility spite

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Tuning the porosity of {Co12IICo8III（μ3-OH）24（X）}11+ supramolecular frameworks by reaction time for D2/H2 separation

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Science China Chemistry 2025年

作者： Zhuozhou Xie Zhu Zhuo Zi-Ang Nan Qing Li Xiufang Li Zi-Xiu Lu Linzhe Lü Jin Liu Luyao Liu Wenjing Wang Wei Wang Daqiang Yuan You-Gui Huang State Key Laboratory of Structure Chemistry Fujian Institute of Research on the Structure of Matter Chinese Academy of Sciences University of Chinese academy of Sciences Xiamen Key Laboratory of Rare Earth Photoelectric Functional Materials Xiamen Institute of Rare Earth Materials Haixi InstitutesChinese Academy of Sciences State Key Laboratory of Physical Chemistry of Solid Surfaces Department of Chemistry College of Chemistry and Chemical EngineeringXiamen University

Systematicly tuning the porosities of porous materials is crucial for targeted gas mixture separation,yet it remains a longstanding *** a common strategy,altering the phenylene ring count in the organic building units has been exploited to adjust pore apertures in metal organic frameworks （MOFs） and covalent organic frameworks （COFs）,resulting in only a stepwise pore size variation of approximately 2.8?.Unlike MOFs and COFs,the porosities for supramolecular assembly frameworks are highly dependent on the packings of the molecular building units in the *** above strategy cannot be applied to supramolecular assembly frameworks and other strategies are required to adjust pore apertures in supramolecular frameworks,especially to achieve porous materials with the optimal pore size for D2/H2separation （～3?）.Here,we successfully modulate the porosity of supramolecular frameworks of[CoII1+12CoIII8L12（μ3-OH）24（X）]1clusters （L=mono-deprotonated 1-iminoisoindole-3-amine,X=ClO?4or Cl?） by controlling the duration of self-assembly *** simply adjusting the reaction time,we obtain three[CoII12CoIII8L12（μ3-OH）24（X）]11+supramolecular frameworks:[CoII12CoIII8（μ3-OH）24（ClO4）L12)]·（Cl）4·（HCO2）7（1）,[CoII12CoIII8L12（μ3-OH）24（Cl）]·（ClOI4）4·（Cl）6·（HCO2）·（H2O）10（2）,and[CoI12CoIII8L12（μ3-OH）24（Cl）]·（Cl）11·（H2O）12（3）.The different stacking patterns of the[CoII12CoIII8L12（μ3-OH）24（X）]11+clusters in these frameworks lead to significantly varied stabilities and *** 1 exhibits permanent porosity with interconnected channels and maintains stability under harsh *** contrast,compound 2 is nearly nonporous,and compound 3 becomes unstable upon *** pores of compound 1 show higher affinity to D2than H2,and the pore aperture diameter of compound 1 （～3.06?） meets the optimal porosity for D2/***,compound 1 demonstrates moderate D2/H2separation at 77 K (retention time:～7 min/g for D2/H2/Ne （10/10/80 vol%） in a flow of 5 mL

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Regional Patterns of Disability and Their Relationship with Socioeconomic Conditions-China,2006

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China CDC weekly 2022年第43期4卷 962-966,I0002,I0003页

作者： Huiyun Fan Yanan Luo APEC health Science academy/Institute of Population Research Peking UniversityBeijingChina Department of global health School of Public HealthPeking UniversityBeijingChina

What is already known about this topic?Understanding the regional distributions of disability is helpful for policymaking in precise disability prevention and control,especially in ***,only a few studies have focused on the regional distributions of disability and their relationships with socioeconomic conditions,and almost all of them have ignored the variances of disability within provinces in *** is added by this report?This research found that with the increase in the regional income level,the prevalence of disability showed a decreasing *** aging process of disability in high-income regions is more serious than that in other income level regions,and with the improvement of income level,the prevalence of disability in males declines *** are the implications for public health practice?The study analyzed the county-level distribution patterns of disability and their relationship with socioeconomic factors to provide a basis for implementing regional policies on disability prevention and control.

关键词： prevention China income

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Trends and Challenges for Population and health During Population Aging——China,2015-2050

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China CDC weekly 2021年第28期3卷 593-598,I0001页

作者： Yanan Luo Binbin Su Xiaoying Zheng Department of global health School of Public HealthPeking UniversityBeijingChina APEC health Science academy Peking UniversityBeijingChina Institute for global health and Development Peking UniversityBeijingChina Institute of Population Research Peking UniversityBeijingChina

Summary What is already known about this topic?As the largest country in the world,China experienced a demographic transition at a historic scale during the past 50 years with extraordinarily associated changes in the age structure of the population,declining fertility rates,accelerating process of population aging,and growing population scale.

关键词： Population demographic Challenges

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Ending the epidemics of cardiovascular diseases:time is now to integrate both population and individual strategies for prevention

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Science Bulletin 2018年第12期63卷 735-736页

作者： Mengna Huang Simin Liu Department of Epidemiology and Center for global Cardiometabolic health(CGCH) Brown University School of Public Health Department of Endocrinology Guangdong General Hospital and Guangdong Academy of Medical Sciences

Cardiovascular disease(CVD)has been the leading cause of death for well over a century[1].To date,CVD remains the number one cause of death globally,and approximately one fourth of the world’s CVD occur in China wher... 详细信息

关键词：流行病心血管疾病人口集成预防时间 CVD

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Age,Sex,and Disease-Specific Mortality Contributions to Life Expectancy in Urban and Rural China,1987–2021

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China CDC weekly 2024年第28期6卷 684-688,I0001页

作者： Zuliyaer Talifu Chen Chen Xinran Shen Panliang Zhong Yanan Luo Binbin Su Department of Population health and Aging Science School of Population Medicine and Public HealthChinese Academy of Medical Sciences/Peking Union Medical CollegeBeijingChina School of Population Medicine and Public health Chinese Academy of Medical Sciences/Peking Union Medical CollegeBeijingChina Department of global health School of Public HealthPeking UniversityBeijing100191China

What is already known about this topic?Over the past several decades,China has experienced substantial improvements in life expectancy(LE),signifying major advancements in public health *** is added by this report?This study offers an in-depth analysis of the contributions made by various diseases and age demographics to the growth of LE in China over the past 35 years,highlighting crucial factors that influence population *** are the implications for public health practice?The results highlight the need for interventions tailored to various disease types and age groups in order to enhance LE and improve public health *** health strategies should prioritize disease prevention,control initiatives,and enhancements in healthcare services that are specifically designed to meet the needs of distinct population demographics.

关键词： Rural Urban prevention

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