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Elevational distribution of forests and its spatiotemporal dynamics in subtropical China from 2000 to 2019

Science China Earth Sciences 2024年第8期67卷 2563-2582页

作者： Zhencan ZHENG Liuwen zhuang Guofang MIAO Han LIU Zhiqiang CHENG Wenyu LI Rong SHANG Peng GONG jing Ming CHEN Institute of Geography Fujian Normal University Key Laboratory of Humid Subtropical Eco-Geographical Process (Ministry of Education) Fujian Normal University School of Geographical Sciences Fujian Normal University National Land Consolidation Center Ministry of Natural Resources Key Laboratory of Land Consolidation and Rehabilitation Ministry of Natural Resources Key Laboratory of Digital Mapping and Land Information Application Ministry of Natural Resources Department of Geography & Planning University of Toronto Department of Geography The University of Hong Kong

The subtropical region of China possesses abundant forest resources and features a mountainous *** the implementation of policies such as natural forest protection,the Grain for Green Project,and other initiatives since the beginning of the 21st century,coupled with climate change,the forest resources in this region have undergone significant changes compared to historical *** addition,forest resources distributing mainly in mountainous areas also implies that these changes may vary significantly with *** explore the spatiotemporal dynamics of forest distribution in subtropical China since 2000,especially the trend of changes with elevation,we analyzed the data from two land cover products focusing on forest cover and forest *** used a hierarchical approach,in which coarse-classification forest cover data with relatively small uncertainties impose constraints on forest type data with larger uncertainties,to achieve a reasonable balance between obtaining more details and reducing data *** first divided the forest cover data into‘unchanged'and‘changed'*** the constraints by the forest cover results,we further analyzed the‘unchanged'and‘changed'forest *** results indicated that,since the implementation of ecological engineering and management policies,54%of the area in the subtropical region had maintained unchanged forest cover attributes over the past 20 years,which implied the good state of ecological *** results also showed that dynamic conversions existed in the long term between forests and lands for essential production needs like *** elevational variations of forest cover suggested that the dominant changes came from the conversion between forests and croplands in low-elevation regions below 700 m,the conversion between forests and shrublands in mid-elevation regions of 700–1500 m,and the conversion between forests and grasslands in high-elevation regions above 2000 *** the regio

关键词： Subtropical China Land cover Forest cover Forest type Elevational distribution

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Cesium removal from radioactive wastewater by adsorption and membrane technology

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Frontiers of Environmental Science & Engineering 2024年第3期18卷 161-175页

作者： Shuting zhuang Jianlong Wang School of Environment&Natural Resources Renmin University of ChinaBeijing 100872China Laboratory of Environmental Technology INETTsinghua UniversityBeijing 100084China Beijing Key Laboratory of Radioactive Waste Treatment INETTsinghua UniversityBeijing 100084China

Radiocesium is frequently present in radioactive wastewater,while its removal is still a challenge due to its small hydrated radius,high diffusion coefficient,and similar chemical behavior to other alkali metal elements with high background *** review summarized and analyzed the recent advances in the removal of Cs+from aqueous solutions,with a particular focus on adsorption and membrane separation *** inorganic,organic,and biological adsorbents have undergone assessments to determine their efficacy in the removal of cesium ***,membrane-based separation techniques,including reverse osmosis,forward osmosis,and membrane distillation,have also shown promise in effectively separating cesium ions from radioactive ***,this review summarized the main approaches,including Kurion/SARRY system+desalination system and advanced liquid processing system,implemented after the Fukushima Daiichi nuclear power plant accident in Japan to remove radionuclides from contaminated *** technology and membrane separation technology play a vital role in treatment of contaminated water.

关键词： Cesium Adsorption Membrane separation Advanced liquid processing system Fukushima nuclear accident

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Alternate disinfection approaches or raise disinfectant dosages for sewage treatment plants to address the COVID-19 pandemic?From disinfection efficiency,DBP formation,and toxicity perspectives

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Frontiers of Environmental Science & Engineering 2024年第9期18卷 115-128页

作者： Xiaobin Liao Xinyue Liu Yueyun He Xueping Tang Ruanjunjie Xia Yongjun Huang Wenhua Li jing Zou Zhenming Zhou Mazhan zhuang Institute of Municipal and Environmental Engineering College of Civil EngineeringHuaqiao UniversityXiamen 361021China Xiamen Institute of Environmental Science Xiamen 361021China College of Biomedical Sciences Huaqiao UniversityXiamen 361021China

During the COVID-19 pandemic,most sewage treatment plants increased disinfectant dosages to inactivate pathogenic viruses and microorganisms more ***,this approach also led to the production of more disinfection by-products(DBPs).To ensure both disinfection efficiency and a reduction in DBP formation,new disinfection protocols are *** this study,the disinfection efficiency,DBP amounts,and toxicity changes resulting from ozone(O_(3)),ultraviolet(UV),chlorine(Cl_(2)),and their combined processes were *** results demonstrated that the O_(3)/UV/Cl_(2)combination achieved the highest disinfection *** produced the most DBPs,whereas UV treatment reduced the formation of trihalomethane(THM),halogenated ketones(HKs),haloacetic acids(HAA),dichloroacetonitrile(DCAN)and N-nitrosodimethylamine(NDMA)by 45.9%,52.6%,82.0%,67.95%,and 47%,respectively.O_(3)also significantly reduced their production by 99.1%,91.1%,99.5%,100%,and 35%.Intracellular organic matter(IOM)was identified as the primary DBP precursors,producing 2.94 times more DBPs than extracellular organic matter(EOM).The increased DBP formation during chlorination was attributed to IOM leakage and cell membrane damage,which was verified using scanning electron microscopy(SEM).The toxicities of DBPs were evaluated for six disinfection methods,revealing inconsistent *** overall toxicities were assessed using zebrafish embryo *** evaluations indicated that chlorination alone was the least favorable *** addition,the toxicities followed a sequence:Cl_(2)≈O_(3)/Cl_(2)>O_(3)>O_(3)/UV/Cl_(2)>UV>UV/Cl_(2).These findings can serve as a reference for sewage treatment plants in selecting appropriate disinfection methods to manage the COVID-19 epidemic from comprehensive perspective.

关键词： Sewage bacteria Disinfection by-products Toxicity Ozonation UV Chlorination

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Natural sources,refined extraction,biosynthesis,metabolism,and bioactivities of dietary polymethoxyflavones(PMFs)

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Food Science and Human Wellness 2024年第1期13卷 27-49页

作者： Renyou Gan yi Liu Hang Li Yu Xia Huan Guo Fang Geng Qiguo zhuang Huabin Li Dingtao Wu Research Center for Plants and Human Health Institute of Urban AgricultureChinese Academy of Agricultural SciencesChengdu National Agricultural Science and Technology CenterChengdu 610213China Key Laboratory of Coarse Cereal Processing Ministry of Agriculture and Rural AffairsSichuan Engineering and Technology Research Centre of Coarse Cereal IndustralizationSchool of Food and Biological EngineeringChengdu UniversityChengdu 610106China China-New Zealand Belt and Road Joint Laboratory on Kiwifruit Sichuan Provincial Academy of Natural Resource SciencesChengdu 610213China Guangdong Provincial Key Laboratory of Food Nutrition and HealthSchool of Public HealthSun Yat-sen UniversityGuangzhou 510080China

Polymethoxyflavones(PMFs)are a type of uncommon dietary flavonoids,characterized by more than one methoxy group,which exist in limited plant species,like Citrus species and Kaempferia *** addition,different PMFs,such as nobiletin,sinensetin,tangeretin,and casticin,have been isolated from these natural *** have received increasing attention due to their multiple bioactivities,such as antioxidant,anti-inflammatory,anti-cancer,metabolic regulatory,immunoregulatory,neuroprotective,and skin protective *** bioactivities of PMFs should be associated with the regulation of critical molecular targets and the interaction with gut *** order to provide a comprehensive and updated review of PMFs,their natural sources,refined extraction,biosynthesis,metabolism,and bioactivities are summarised and discussed,with the emphasis on the molecular mechanisms of PMFs on regulating different chronic ***,PMFs may be promising flavonoids to the forefront of nutraceuticals for the prevention and/or treatment of certain human chronic diseases.

关键词： Nobiletin O-Methyltransferases Gut microbiota Bioactivities Molecular mechanism

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High patatin like phospholipase domain containing 8 expression as a biomarker for poor prognosis of colorectal cancer

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World Journal of Gastrointestinal Oncology 2024年第3期16卷 787-797页

作者： Peng-Yang Zhou De-Xiang Zhu yi-Jiao Chen Qing-Yang Feng yi-Hao Mao Ao-Bo zhuang Jian-Min Xu Department of General Surgery Zhongshan Hospital Fudan UniversityShanghai 200032China

BACKGROUND Patatin like phospholipase domain containing 8(PNPLA8)has been shown to play a significant role in various cancer *** studies have focused on its roles as an antioxidant and in lipid ***,the role of PNPLA8 in colorectal cancer(CRC)progression is *** To explore the prognostic effects of PNPLA8 expression in *** A retrospective cohort containing 751 consecutive CRC patients was ***8 expression in tumor samples was evaluated by immunohistochemistry staining and semi-quantitated with immunoreactive *** patients were divided into high and low PNPLA8 expression groups based on the cut-off va-lues,which were calculated by X-tile *** prognostic value of PNPLA8 was identified using univariate and multivariate Cox regression *** over-all survival(OS)rates of CRC patients in the study cohort were compared with Kaplan-Meier analysis and Log-rank *** PNPLA8 expression was significantly associated with distant metastases in our cohort(P=0.048).CRC patients with high PNPLA8 expression indicated poor OS(median OS=35.3,P=0.005).CRC patients with a higher PNPLA8 expression at either stage I and II or stage III and IV had statistically significant shorter *** patients with left-sided colon and rectal cancer,the survival curves of two PN-PLA8-expression groups showed statistically significant *** analysis also confirmed that high PNPLA8 expression was an independent prog-nostic factor for overall survival(hazard ratio HR=1.328,95%CI:1.016-1.734,P=0.038).

关键词： Biomarker Colorectal cancer Expression level Overall survival Patatin like phospholipase domain containing 8 Prognosis

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Ultrahigh thermoelectric properties of p‐type Bi_(x)Sb_(2−x)Te_(3)thin films with exceptional flexibility for wearable energy harvesting

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Carbon Energy 2024年第8期6卷 273-284页

作者： zhuang‐Hao Zheng yi‐Ming Zhong yi‐Liu Li Mohammad Nisar Adil Mansoor Fu Li Shuo Chen Guang‐Xing Liang Ping Fan Dongyan Xu Meng Wei Yue‐Xing Chen Shenzhen Key Laboratory of Advanced Thin Films and Applications Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong ProvinceCollege of Physics and Optoelectronic EngineeringShenzhen UniversityShenzhenChina Department of Mechanical and Automation Engineering The Chinese University of Hong KongSha TinChina

Use of a flexible thermoelectric source is a feasible approach to realizing selfpowered wearable electronics and the Internet of *** thin films are promising candidates for fabricating flexible power supply,but obtaining highthermoelectric‐performance thin films remains a big *** the present work,a p‐type Bi_(x)Sb_(2−x)Te_(3)thin film is designed with a high figure of merit of 1.11 at 393 K and exceptional flexibility(less than 5%increase in resistance after 1000 cycles of bending at a radius of∼5 mm).The favorable comprehensive performance of the Bi_(x)Sb_(2−x)Te_(3)flexible thin film is due to its excellent crystallinity,optimized carrier concentration,and low elastic modulus,which have been verified by experiments and theoretical ***,a flexible device is fabricated using the prepared p‐type Bi_(x)Sb_(2−x)Te_(3)and n‐type Ag_(2)Se thin ***,an outstanding power density of∼1028μWcm^(−2)is achieved at a temperature difference of 25 *** work extends a novel concept to the fabrication of highperformance flexible thin films and devices for wearable energy harvesting.

关键词： Bi_(x)Sb_(2−x)Te_(3) electrical transport properties flexibility thermoelectric

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Sandpaper-templated Stretchable Immunosensing Electrodes for Sub-picomolar Progesterone Detection

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Chemical Research in Chinese Universities 2024年第5期40卷 874-880页

作者： LI Zhaoxian MENG Xingyu FANG Chuyao yi Zhenkai WU Yaoyao LIU Xuanxuan ZHONG Wei ZHANG Limei XIE zhuang School of Materials Science and Engineering Key Laboratory for Polymeric Composite and Functional Materials of Ministry of EducationSun Yat-sen UniversityGuangzhou510275P.R.China Reproductive Medicine Center Department of Obstetrics and Gynecologythe First Affiliated Hospital of Sun Yat-sen UniversityGuangzhou510080P.R.China

Female hormone detection,particularly non-invasive monitoring progesterone(P4)levels in body fluids,plays a critical role in female health management and disease ***,the challenge still exists because of the ultralow abundance of P4(<100 pmol/L)in sweat and saliva,necessitating highly sensitive methods for wearable ***,we present a simple sandpaper-templated stretchable immunosensing electrode designed for ultra-sensitive detection of P4 at sub-picomolar level.A molding technique is employed to replicate the sandpaper textures to provide a microstructured elastomeric substrate for electrode *** microstructured surface coated with poly(3,4-ethylenedioxythiophene):poly(4-styrenesulfonate)(PEDOT:PSS)/LiTFSI[LiTFSI=lithium bis(trifluoromethanesulfonyl)imide]provided a stretchable polymer electrode with high conductivity,and further decoration with gold nanoparticles(AuNPs)enabled the immunosensing for P4 by electrochemical impedance spectroscopy(EIS)*** adjusting the AuNPs deposition conditions,ultrasensitive detection of P4 is realized with a low limit of detection(LOD)of ca.10 fmol/L and a tunable dynamic range up toµmol/***,the stretchable electrode exhibits stable electrochemical performance,enabling the detection of P4 at sub-picomolar levels even under mechanical strain of 30%.This innovative electrochemical sensor holds significant promise for non-invasive,on-site monitoring of P4 levels in healthcare,as well as hormone detection in food safety and environment surveillance.

关键词： Progesterone Immunosensor Microstructured electrode Stretchable biosensor Electrochemical sensing

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Diverse atomic structure configurations of metal-doped transition metal dichalcogenides for enhancing hydrogen evolution

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Nano Research 2024年第5期17卷 3586-3602页

作者： Longlu Wang Yuxin Zhang Chen Gu Haoxuan Yu Yanling zhuang Zechao zhuang College of Electronic and Optical Engineering and College of Flexible Electronics(Future Technology) Jiangsu Province Engineering Research Center for Fabrication and Application of Special Optical Fiber Materials and DevicesNanjing University of Posts and TelecommunicationsNanjing 210023China Department of Chemical Engineering Columbia UniversityNew YorkNY 10027USA

Doping foreign metal atoms into the substrate of transition metal dichalcogenides(TMDs)enables the formation of diverse atomic structure configurations,including isolated atoms,chains,and ***,it is very important to reasonably control the atomic structure and determine the structure-activity relationship between the atomic configurations and the hydrogen evolution reaction(HER)*** numerous studies have indicated that doping can yield diverse atomic structure configurations,there remains an incomplete understanding of the relationship between atomic configurations within the lattice of TMDs and their ***,diverse atomic structure configurations of adsorptive doping,substitutional doping,and TMDs alloys are *** structure-activity relationship between different atomic configurations and HER performance can be determined by micro-nanostructure devices and density functional theory(DFT)*** diverse atomic structure configurations are of great significance for activating the inert basal plane of TMDs and improving the catalytic activity of ***,we have summarized the current challenges and future opportunities,offering new perspectives for the design of highly active and stable metal-doped TMDs catalysts.

关键词： transition metal dichalcogenides(TMDs) dopant effect diverse atomic structure configurations hydrogen evolution reaction(HER)

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Typhoon-Induced Ocean Waves and Stokes Drift:A Case Study of Typhoon Mangkhut(2018)

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China Ocean Engineering 2024年第4期38卷 711-724页

作者： WU Zhi-yuan GAO Kai CHEN Jie ZHANG Hao-jian DENG Bin JIANG Chang-bo LIU yi-zhuang LYU Zhao YAN Ren School of Hydraulic and Environmental Engineering Changsha University of Science&TechnologyChangsha 410114China Key Laboratory of Water-Sediment Sciences and Water Disaster Prevention of Hunan Province Changsha 410114China State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering Hohai UniversityNanjing 210024China State Key Laboratory of Coastal and Offshore Engineering Dalian University of TechnologyDalian 116024China School of Civil Engineering Hunan University of TechnologyZhuzhou 412007China

Ocean waves and Stokes drift are generated by *** study investigated the characteristics of ocean waves and wave-induced Stokes drift and their effects during Typhoon Mangkhut using European Centre for MediumRange Weather Forecasts(ECMWF)ERA5 datasets and observational *** results revealed that the typhoon generated intense cyclones and huge typhoon waves with a maximum wind speed of 45 m/s,a minimum pressure of955 h Pa,and a maximum significant wave height of 12 *** Stokes drift caused by typhoon waves exceeded 0.6m/s,the Stokes depth scale exceeded 18 m,and the maximum Stokes transport reached 6 m^(2)/*** spatial distribution of 10-m wind speed,typhoon wave height,Stokes drift,Stokes depth,and Stokes transport during the typhoon was highly correlated with the typhoon *** distribution along the typhoon track showed significant zonal asymmetry,with greater intensity on the right side of the typhoon track than on the left *** findings provide important insights into the impact of typhoons on ocean waves and Stokes drift,thus improving our understanding of the interactions between typhoons and the ocean *** study also investigated the contribution of Stokes transport to the total net transport during typhoons using Ekman-Stokes Numbers as a comparative *** results indicated that the ratio of Stokes transport to the total net transport reached up to 50%within the typhoon radius,while it was approximately 30%outside the *** Stokes transport induced by typhoon waves led to divergence in the transport direction,which resulted in upwelling of the lower ocean as a compensation ***,Stokes transport played a crucial role in the vertical mixing of the ocean during *** findings suggested that Stokes transport should be paid more attention to,particularly in high latitude ocean regions,where strong winds can amplify its effects.

关键词： Stokes drift typhoon waves Ekman-Stokes transport vertical mixing Typhoon Mangkhut

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Preparation of Chemically Recyclable Poly(ether-alt-ester) by the Ring Opening Polymerization of Cyclic Monomers Synthesized by Coupling Glycolide and Epoxides

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Chinese Journal of Polymer Science 2024年第2期42卷 168-175,I0006页

作者： Feng Ren zhuang-zhuang Liang Ming-Xin Niu Chen-Yang Hu Xuan Pang Key Laboratory of Polymer Ecomaterials Changchun Institute of Applied ChemistryChinese Academy of SciencesChangchun130022China School of Applied Chemistry and Engineering University of Science and Technology of ChinaHefei230026China

Polyester and polyether are two key oxygenated polymers, and completely alternative sequence of poly(ester-alt-ether) could efficiently combine the advantages(including flexibility, degradability, etc.) of both segments. Currently, despite their copolymers could be synthesized from one-pot mixture of cyclic esters and epoxides, perfectly alternative microstructure is very challenging to realize and typically restricted to certain monomer pairs. Moving forward, synthesizing poly(ester-alt-ether) from commercially available and largescale monomers would be a significant advance. For example, successfully commercialized poly(glycolic acid)(PGA), which is not easily soluble in polymers due to its high crystallinity and is brittle and difficult to control the degradation cycle, would encounter a new paradigm if engineered into poly(ester-altether). In this work, starting from the design of monomer with hybrid structures, we successfully synthesized a series of 1,4-dioxan-2-one containing different substituents based on glycolide(GA) and epoxides using commercially available Salen-Cr(III) and PPNCl catalytic *** new monomers underwent ring-opening polymerization(ROP) to form a series of poly(ester-alt-ether) with perfectly alternating glycolic acid and propylene glycol repeat units under catalytic system of thiourea/base. The poly(ester-alt-ether) have significantly lower glass-transition temperature than PGA. Additionally, the poly(ester-alt-ether) can be chemically recovered to monomer using Sn(Oct)2 or 1,8-diazabicyclo[5.4.0]undecane-7-ene(DBU) as a catalyst in solution, thus establishing a closed-loop life cycle. From monomers derived from GA and epoxides, this work furnishes a novel strategy for the synthesis of poly(ester-alt-ether) with chemical recyclability.

关键词： Polyester Polyether Alternative copolymer Ring-opening polymerization

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