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Assessment of ecological geological vulnerability in Mu Us Sandy Land based on GIS and suggestions of ecological protection and restoration

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China Geology 2025年第1期8卷 117-140页

作者： Jian-yu Liu Hong-feng Nie Liang xu Chun-lei Xiao Wei Li Guo-li Yuan yan-peng Huang Xin-yang Ji Tian-qi Li China Aero Geophysical Survey&Remote Sensing Center for Natural Resources China Geological SurveyMinistry of Natural ResourcesBeijing 100083China China University of Geosciences(Beijing) Beijing 100083China

Eco-geological vulnerability assessment is a significant research topic within the field of eco-geology,but it remains poorly *** Mu Us Sandy Land,located in the central part of the farming-pastoral ecotone in northern China,plays a critical role in maintaining the ecological security pattern in this ***,this sandy land also faces severe sandy desertification and ecological *** study conducted a regional eco-geological vulnerability assessment of the Mu Us Sandy Land using a comprehensive index evaluation method based on eco-geological theories and survey *** construct an appropriate index system for the eco-geological vulnerability assessment of the Mu Us Sandy Land,the study considered the sandy land’s unique characteristics and identified 15 factors of five categories,namely geology,meteorology,soil,topography,and *** paper calculated the comprehensive weights of all the indices using the analytic hierarchy process(AHP)and the entropy weight method(EWM).Furthermore,it established the eco-geological vulnerability index(EGVI)and obtained the assessment *** results showed that the eco-geological vulnerability of the Mu Us Sandy Land gradually intensifies from east to west,manifested as vulnerable eco-geological conditions ***,extremely vulnerable zones are found in the northwestern and southeastern parts of the study area,highly vulnerable zones in the western and southern parts,moderately vulnerable zones in the central part,and slightly and potentially vulnerable zones in the eastern and southern *** with high spatial autocorrelations include the northern Uxin Banner-Otog Banner-Angsu Town area,the surrounding areas of Hongdunjie Town in the southeastern part of the study area,the Hongshiqiao Township-Xiaohaotu Township area,Otog Front Banner,and Bainijing Town,which should be prioritized in the ecological conservation and ***,the paper proposed suggestions for

关键词： Eco-geological vulnerability Analytic hierarchy process Entropy weight method Evaluation and zonation Mu Us Sandy Land Geology-meteorology-soil-topography-vegetation Precipitation and groundwater Environmental protection and restoration Environmental restoration engineering Inner Mongolia Plateau

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Early Crack Propagation Behavior of Laser Metal Deposited Ti-6Al-4V Alloy Under High Cycles Fatigue Loading

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稀有金属材料与工程 2025年第1期54卷 62-75页

作者： Li yanping Huang Wei He yan xu Feng Zhao Sihan Guo Weiguo School of Aeronautics Northwestern Polytechnical UniversityXi'an 710072China School of Astronautics Northwestern Polytechnical UniversityXi'an 710072China

The crack initiation and early propagation are of great significance to the overall fatigue life of *** order to investigate the anisotropic fracture behavior of laser metal deposited Ti-6Al-4V alloy(LMD Ti64)during the early stage,the fourpoint bending fatigue test was carried out on specimens of three different directions,as well as the forged *** results indicate the anisotropic crack initiation and early propagation of LMD *** direction perpendicular to the deposition direction exhibits a better fatigue resistance than the other *** crack initiation position and propagation path are dominated by the microstructure in the vicinity of *** Ti64 has a typical small crack effect,and the early crack propagation velocities in three directions are *** by the slip system of LMD Ti64,secondary cracks frequently occur,which are often found to have an angle of 60°to the main *** electron backscatter diffraction analysis indicates that LMD Ti64 has preferred orientations,i.e.,strong 0001//Z texture and 001//Z *** crystallographic orientation will change as the direction of columnarβgrains turns over,resulting in the fatigue anisotropy of LMD Ti64 in crack initiation and early crack propagation process.

关键词： fatigue resistance crack propagation behavior microstructure laser metal deposit Ti-6Al-4V anisotropy

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The ABC transporter SmABCG1 mediates tanshinones export from the peridermic cells of Salvia miltiorrhiza root

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Journal of Integrative Plant Biology 2025年第1期67卷 135-149页

作者： Yajing Li Junfeng Chen Jingyu Zhi Doudou Huang Yuchen Zhang Lei Zhang Xinyi Duan Pan Zhang Shi Qiu Jiaran Geng Jingxian Feng Ke Zhang xu yang Shouhong Gao Wenwen Xia Zheng Zhou Yuqi qiao Bo Li Qing Li Tingzhao Li Wansheng Chen Ying Xiao The SATCM Key Laboratory for New Resources&Quality Evaluation of Chinese Medicine Institute of Chinese Materia MedicaShanghai University of Traditional Chinese MedicineShanghai 201203China Department of Pharmacy Changzheng HospitalNaval Medical UniversityShanghai 200003China Department of Plant Biology and Ecology College of Life SciencesNankai UniversityTianjin 300071China School of Pharmacy Naval Medical UniversityShanghai 200433China College of Life and Environmental Sciences Hangzhou Normal UniversityHangzhou 310000China Amway(Shanghai)Innovation&Science Co. LtdShanghai 201203China

Plants have mechanisms to transport secondary metabolites from where they are biosynthesized to the sites where they function,or to sites such as the vacuole for ***,current research has mainly focused on metabolite biosynthesis and regulation,and little is known about their ***,a class diterpenoid with medicinal properties,is biosynthesized in the periderm of Salvia miltiorrhiza ***,we discovered that tanshinone can be transported out of peridermal cells and secreted into the soil environment and that the ABC transporter SmABCG1 is involved in the efflux of tanshinoneⅡA and tanshinoneⅠ.The SmABCG1 gene is adjacent to the diterpene biosynthesis gene cluster in the *** *** temporal–spatial expression pattern of SmABCG1 is consistent with tanshinone accumulation ***1 is located on the plasma membrane and preferentially accumulates in the peridermal cells of *** *** expression in Xenopus laevis oocytes demonstrated that SmABCG1 can export tanshinoneⅡA and tanshinoneⅠ.CRISPR/Cas9-mediated mutagenesis of SmABCG1 in *** hairy roots resulted in a significant decrease in tanshinone contents in both hairy roots and the culture medium,whereas overexpression of this gene resulted in increased tanshinone ***76AH3 transcript levels increased in hairy roots overexpressing SmABCG1 and decreased in knockout lines,suggesting that SmABCG1 may affect the expression of CYP76AH3,indirectly regulating tanshinone ***,tanshinoneⅡA showed cytotoxicity to Arabidopsis *** findings offer new perspectives on plant diterpenoid transport and provide a new genetic tool for metabolic engineering and synthetic biology research.

关键词： ATP-binding cassette transporter biosynthesis gene cluster cytotoxicity export peridermic cells tanshinone

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超高效液相色谱-串联质谱法测定水体沉积物中17种新烟碱类杀虫剂及代谢物的残留量

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现代化工 2025年第1期45卷 261-265页

作者：徐彦杨继伟李剑徐巧俞晓峰姜佳钦杭州谱育科技发展有限公司浙江杭州310000 浙江工业大学化学工程学院浙江杭州310000

建立了基于全自动加速溶剂萃取-超高效液相色谱-串联质谱法检测水体沉积物中17种新烟碱类杀虫剂及代谢物残留的分析方法,17种目标物的质量浓度在一定范围内与对应的峰面积呈线性关系,该方法的检出限(3.143s)为0.0007~0.0022μg/kg。在0... 详细信息

建立了基于全自动加速溶剂萃取-超高效液相色谱-串联质谱法检测水体沉积物中17种新烟碱类杀虫剂及代谢物残留的分析方法,17种目标物的质量浓度在一定范围内与对应的峰面积呈线性关系,该方法的检出限(3.143s)为0.0007~0.0022μg/kg。在0.02、0.2、1.5μg/kg加标水平下的平均回收率为82.70%~114.30%,日内精密度和日间精密度的相对标准偏差分别为1.4%~9.4%和3.8%~9.7%。

关键词：全自动加速溶剂萃取新烟碱类杀虫剂超高效液相色谱-串联质谱法水体沉积物

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Association between Per and Polyfluoroalkyl Substance and Abdominal Fat Distribution:A Trait Spectrum Exposure Pattern and Structure-Based Investigation

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Biomedical and Environmental Sciences 2025年第1期38卷 3-14页

作者： Zhi Li Shilin Shan Chenyang Song Chengzhe Tao Hong Qian Qin Yuan yan Zhang qiaoqiao xu Yufeng Qin Yun Fan Chuncheng Lu State Key Laboratory of Reproductive Medicine Center for Global HealthSchool of Public HealthNanjing Medical UniversityNanjing 211166JiangsuChina Key Laboratory of Modern Toxicology of Ministry of Education School of Public HealthNanjing Medical UniversityNanjing 211166JiangsuChina Department of Public Health Kangda College of Nanjing Medical UniversityLianyungang 222000JiangsuChina Department of Microbes and Infection School of Public HealthNanjing Medical UniversityNanjing 211166JiangsuChina

Objective To investigate the associations between eight serum per-and polyfluoroalkyl substances(PFASs)and regional fat depots,we analyzed the data from the National Health and Nutrition Examination Survey(NHANES)2011-2018 *** Multiple linear regression models were developed to explore the associations between serum PFAS concentrations and six fat compositions along with a fat distribution score created by summing the concentrations of the six fat *** associations between structurally grouped PFASs and fat distribution were assessed,and a prediction model was developed to estimate the ability of PFAS exposure to predict obesity *** Among females aged 39-59 years,trunk fat mass was positively associated with perfluorooctane sulfonate(PFOS).Higher concentrations of PFOS,perfluorohexane sulfonate(PFHxS),perfluorodecanoate(PFDeA),perfluorononanoate(PFNA),and n-perfluorooctanoate(n-PFOA)were linked to greater visceral adipose tissue in this *** men,exposure to total perfluoroalkane sulfonates(PFSAs)and long-chain PFSAs was associated with reductions in abdominal fat,while higher abdominal fat in women aged 39-59 years was associated with short-chain *** prediction model demonstrated high accuracy,with an area under the curve(AUC)of 0.9925 for predicting obesity *** PFAS exposure is associated with regional fat distribution,with varying effects based on age,sex,and PFAS *** findings highlight the potential role of PFAS exposure in influencing fat depots and obesity risk,with significant implications for public *** prediction model provides a highly accurate tool for assessing obesity risk related to PFAS exposure.

关键词： Per-and polyfluoroalkyl substances Regional fat depots Obesity Structure-based NHANES

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Genomic selection for meat quality traits based on VIS/NIR spectral information

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Journal of Integrative Agriculture 2025年第1期24卷 235-245页

作者： Xi Tang Lei Xie Min yan Longyun Li Tianxiong Yao Siyi Liu Wenwu xu Shijun Xiao Nengshui Ding Zhiyan Zhang Lusheng Huang State Key Laboratory for Pig Genetic Improvement and Production Technology Jiangxi Agricultural UniversityNanchang 330045China

The principle of genomic selection(GS) entails estimating breeding values(BVs) by summing all the SNP polygenic effects. The visible/near-infrared spectroscopy(VIS/NIRS) wavelength and abundance values can directly reflect the concentrations of chemical substances, and the measurement of meat traits by VIS/NIRS is similar to the processing of genomic selection data by summing all ‘polygenic effects' associated with spectral feature peaks. Therefore, it is meaningful to investigate the incorporation of VIS/NIRS information into GS models to establish an efficient and low-cost breeding model. In this study, we measured 6 meat quality traits in 359Duroc×Landrace×Yorkshire pigs from Guangxi Zhuang Autonomous Region, China, and genotyped them with high-density SNP chips. According to the completeness of the information for the target population, we proposed 4breeding strategies applied to different scenarios: Ⅰ, only spectral and genotypic data exist for the target population;Ⅱ, only spectral data exist for the target population;Ⅲ, only spectral and genotypic data but with different prediction processes exist for the target population;and Ⅳ, only spectral and phenotypic data exist for the target *** 4 scenarios were used to evaluate the genomic estimated breeding value(GEBV) accuracy by increasing the VIS/NIR spectral information. In the results of the 5-fold cross-validation, the genetic algorithm showed remarkable potential for preselection of feature wavelengths. The breeding efficiency of Strategies Ⅱ, Ⅲ, and Ⅳ was superior to that of traditional GS for most traits, and the GEBV prediction accuracy was improved by 32.2, 40.8 and 15.5%, respectively on average. Among them, the prediction accuracy of Strategy Ⅱ for fat(%) even improved by 50.7% compared to traditional GS. The GEBV prediction accuracy of Strategy Ⅰ was nearly identical to that of traditional GS, and the fluctuation range was less than 7%. Moreover, the breeding cost of the 4 strategies was lo

关键词： VIS/NIR genomic selection GEBV machine learning pig meat quality

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Structure variation of cadmium naphthalene⁃diphosphonates with the changing rigidity of N⁃donor auxiliary ligands

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无机化学学报 2025年第2期41卷 395-406页

作者： xu yan LI Suzhi LI yan FENG Lushun SUN Wentao LI Xinxing Department of Chemistry School of Biological and Materials EngineeringSuqian UniversitySuqianJiangsu 223800China

Five cadmium naphthalene-diphosphonates,formulated as[Cd_(1.5)(1,4-ndpaH_(2))2(4,4'-bpyH)(4,4'-bpy)0.5(H_(2)O)_(2)]2(1),[Cd(1,4-ndpaH_(2))(1,4-bib)0.5(H_(2)O)](2),[Cd(1,4-ndpaH3)2(1,2-dpe)(H_(2)O)]·(1,2-dpe)·7H_(2)O(3),(1,2-bixH)[Cd3(1,4-ndpaH)(1,4-ndpaH_(2))2(H_(2)O)_(2)](4),and[Cd(1,4-ndpaH_(2))(H_(2)O)]·H_(2)O(5),have been synthesized from the selfassembly reactions of 1,4-naphthalenediphosphonic acid(1,4-ndpaH4)with Cd(NO3)2·4H_(2)O by introducing auxiliary ligands with variation of rigidity,such as 4,4'-bipyridine(4,4'-bpy),1,4-bis(1-imidazolyl)benzene(1,4-bib),1,2-di(4-pyridyl)ethylene(1,2-dpe),1,3-di(4-pyridyl)propane(1,3-dpp),and bis(imidazol-1-ylmethyl)benzene(1,2-bix),*** resolution by single-crystal X-ray diffraction reveals that compound 1 possesses a layered framework,in which the{Cd3(PO2)2}trimers made up of corner-sharing two{CdO4N2}and one{CdO6}octahedra are connected by phosphonate groups,forming a ribbon,which are cross-linked by 4,4'-bipy ligands,forming a 2D *** 2 shows a 3D open-framework structure,where chains of corner-sharing{CdO4N}trigonal bipyramids and{PO3C}tetrahedra are cross-linked by 1,4-bib and/or phosphonate groups.A 1D ladder-like chain structure is found in compound 3,where the ladder-like chains made up of corner-sharing{CdO5N}octahedra and{PO3C}tetra hedra are connected by 1,4-ndpaH_(2)^(2-).Both compounds 4 and 5 obtained by the introduction of flexible ligands during the synthesis show a 2D layered structure,which is formed by ligand crosslinking double metal ***,In 4,flexible 1,2-bix was singly protonated,as guest molecules,filled between layer and layer,while flexible ligand 1,3-dpp is absent in *** measurements indicate that compounds 1-5 show ligand-centered emissions.

关键词： naphthalene diphosphate N-donor auxiliary ligands crystal structure rigidity flexibility

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Microstructure characteristics and corrosion behavior of metal inert gas welded dissimilar joints of 6005A modified by Sc and 5083 alloys

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Transactions of Nonferrous Metals Society of China 2025年第1期35卷 60-76页

作者： Guo-fu xu Liang LIU Ying DENG Yu ZENG Jun-chang CAO Lei TANG Xiao-yan PENG Jia-qi DUAN Mei-chan LIANG Qing-lin PAN School of Materials Science and Engineering Central South UniversityChangsha 410083China State Key Laboratory of Power Metallurgy Central South UniversityChangsha 410083China Baoshan Iron&Steel Co. Ltd.Shanghai 201900China Warwick Manufacturing Group The University of WarwickCoventryCV47ALUK Guangdong Weiye Aluminum Factory Group Co. Ltd.Foshan 528000China

The corrosion behavior and microstructure characteristics of metal inert gas(MIG)welded dissimilar joints of the 6005A alloy modified with Sc(designated as 6005A+Sc)and the 5083 alloy were investigated using corrosion tests and microscopy *** show that the dissimilar joints exhibit strong stress corrosion cracking(SCC)resistance,maintaining substantial strength during slow strain rate tensile ***,the heat-affected zone(HAZ)and base metal(BM)on the 6005A+Sc side show superior performance in terms of inter-granular corrosion(IGC)and exfoliation corrosion(EXCO)compared to the corresponding zones on the 5083 *** lower corrosion resistance of the 5083-BM and the 5083-HAZ can be attributed to the presence of numerous Al_(2)Mg_(3)phases and micro-scaled Al_(6)(Mn,Fe)intermetallics,mainly distributed along the rolling ***,the enhanced corrosion resistance of the 6005A+Sc-BM and the 6005A+Sc-HAZ can be attributed to the discontinuously distributed grain boundary precipitates(β-Mg_(2)Si),the smaller grain size,and the reduced corrosive current density.

关键词： metal inert gas welding dissimilar joint aluminum alloy corrosion,microstructure

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Electronic structure,elasticity,magnetism of Mn_(2)XIn(X=Fe,Co)full Heusler compounds under biaxial strain:First-principles calculations

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Chinese Physics B 2025年第1期34卷 438-449页

作者： Shiran Gao Chengyang Zhao Xinzhuo Zhang Wen qiao Shiming yan Ru Bai Tiejun Zhou School of Electronics and Information Hangzhou Dianzi UniversityHangzhou 310018China

The electronic structure,elasticity,and magnetic properties of the Mn_(2)XIn(X=Fe,Co)full-Heusler compounds are comprehensively investigated via first-principles *** calculated elastic constants indicate that both Mn_(2)FeIn and Mn_(2)Co In possess *** the optimal lattice constants,the magnetic moments are found to be 1.40μB/*** Mn_(2)FeIn and 1.69μB/*** Mn_(2)*** the biaxial strain ranging from-2%to 5%,Mn_(2)FeIn demonstrates a remarkable variation in the spin polarization,spanning from-2%to 74%,positioning it as a promising candidate for applications in spintronic *** of the electronic structure reveals that the change in spin polarization under strain is due to the shift of the spin-down states at the Fermi ***,under biaxial strain,the magnetic anisotropy of Mn_(2)FeIn undergoes a transition of easy-axis *** second-order perturbation theory and electronic structure analysis,the variation in magnetic anisotropy with strain can be attributed to changes of d-orbital states near the Fermi surface.

关键词： magnetic anisotropy biaxial strain electronic band structure mechanical properties

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Chondroitinase ABC combined with Schwann cell transplantation enhances restoration of neural connection and functional recovery following acute and chronic spinal cord injury

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Neural Regeneration Research 2025年第5期20卷 1467-1482页

作者： Wenrui Qu Xiangbing Wu Wei Wu Ying Wang yan Sun Lingxiao Deng Melissa Walker Chen Chen Heqiao Dai Qi Han Ying Ding Yongzhi Xia George Smith Rui Li Nai-Kui Liu Xiao-Ming xu Spinal Cord and Brain Injury Research Group Stark Neurosciences Research InstituteDepartment of Neurological SurgeryIndiana University School of MedicineIndianapolisINUSA Department of Hand Surgery the Second Hospital of Jilin UniversityChangchunJilin ProvinceChina Shriners Hospitals Pediatric Research Center Temple University School of MedicinePhiladelphiaPAUSA Department of Anatomy&Cell Biology Indiana University School of MedicineIndianapolisINUSA

Schwann cell transplantation is considered one of the most promising cell-based therapy to repair injured spinal cord due to its unique growth-promoting and myelin-forming properties.A the Food and Drug Administration-approved Phase I clinical trial has been conducted to evaluate the safety of transplanted human autologous Schwann cells to treat patients with spinal cord injury.A major challenge for Schwann cell transplantation is that grafted Schwann cells are confined within the lesion cavity,and they do not migrate into the host environment due to the inhibitory barrier formed by injury-induced glial scar,thus limiting axonal reentry into the host spinal *** we introduce a combinatorial strategy by suppressing the inhibitory extracellular environment with injection of lentivirus-mediated transfection of chondroitinase ABC gene at the rostral and caudal borders of the lesion site and simultaneously leveraging the repair capacity of transplanted Schwann cells in adult rats following a mid-thoracic contusive spinal cord *** report that when the glial scar was degraded by chondroitinase ABC at the rostral and caudal lesion borders,Schwann cells migrated for considerable distances in both rostral and caudal *** Schwann cell migration led to enhanced axonal regrowth,including the serotonergic and dopaminergic axons originating from supraspinal regions,and promoted recovery of locomotor and urinary bladder ***,the Schwann cell survival and axonal regrowth persisted up to 6 months after the injury,even when treatment was delayed for 3 months to mimic chronic spinal cord *** findings collectively show promising evidence for a combinatorial strategy with chondroitinase ABC and Schwann cells in promoting remodeling and recovery of function following spinal cord injury.

关键词： axonal regrowth bladder function chondroitinase ABC functional recovery glial scar lentivirus migration Schwann cell spinal cord injury transplantation

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