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Woody plant taxonomic,functional,and phylogenetic diversity decrease along elevational gradients in Andean tropical montane forests:Environmental filtering and arrival of temperate taxa

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Plant Diversity 2024年第4期46卷 491-501页

作者： Guillermo ba.a.es-de-Dios Manuel J.Macía Gabriel Arellano Íñigo Granzow-de la Cerda Julia Vega-álvarez Itziar Arnelas Carlos I.Espinosa Norma Salinas Luis Cayuela Departamento de Biología y Geología Física y Química InorgánicaUniversidad Rey Juan CarlosCalle Tulipán s/nMóstolesMadridES-28933Spain Departamento de Biología Área de BotánicaUniversidad Autónoma de MadridCalle Darwin 2MadridES-28049Spain Centro de Investigación en Biodiversidad y Cambio Global(CIBC-UAM) Universidad Autónoma de MadridCalle Darwin 2MadridES-28049Spain Ecology and Evolutionary Biology University of MichiganAnn ArborMI 48109USA Oikobit LLC ***AlbuquerqueNM87120USA Real Jardín Botánico–CSIC Plaza Murillo 2MadridES-28014Spain Departamento de Biología Animal EcologíaParasitologíaEdafología y Química AgrícolaUniversidad de SalamancaCalle Donantes de Sangre s/nSalamancaES-37007Spain Departamento de Biodiversidad Ecología y EvoluciónUniversidad Complutense de MadridCalle JoséAntonio Nováis 12Ciudad UniversitariaES-28040Spain Departamento de Ciencias Biológicas y Agropecuarias Universidad Técnica Particular de LojaA.P.11-01-608 LojaEcuador Sección Química Pontificia Universidad Católica del PerúA.P.Lima 32LimaPeru ECI School of Geography and EnvironmentUniversity of OxfordOX13QYOxfordshireUnited Kingdom Instituto de Investigación en Cambio Global(IICG-URJC) Universidad Rey Juan CarlosCalle Tulipán s/nMóstolesMadridES-28933Spain

Mountains are paramount for exploring biodiversity patterns due to the mosaic of topographies and climates encompassed over short *** research has traditionally focused on taxonomic diversity when investigating changes along elevational gradients,but other facets should be *** first time,we simultaneously assessed elevational trends in taxonomic,functional,and phylogenetic diversity of woody plants in Andean tropical montane forests and explored their underlying ecological and evolutionary *** investigation covered four transects(traversing ca.2200 m a.s.l.) encompassing 114 plots of 0.1 ha across a broad latitudinal range(ca.10°).Using Hill numbers to quantify abundance-based diversity among 37,869 individuals we observed a consistent decrease in taxonomic,functional,and phylogenetic diversity as elevation increased,although the decrease was less pronounced for higher Hill *** exception was a slight increase in phylogenetic diversity when dominant species were *** decrease in taxonomic and functional diversity might be attributed to an environmental filtering process towards highlands,where the increasingly harsher conditions exclude species and functional ***,the differences in steepness decrease between Hill orders suggest that rare species disproportionately contribute to functional *** phylogenetic diversity the shifting elevational trend between Hill orders indicates a greater than previously considered influence in central Andean highlands of tropical lowlands originated species with strong niche conservatism relative to distantly related temperate *** could be explained by a decreasing presence and abundance of temperate,extratropical taxa towards the central Andes relative to northern or southern Andes,where they are more prevalent.

关键词： Altitudinal gradients Andes Environmentalﬁltering Out of the Tropical Lowlands Functional rarity Tropical Niche Conservatism

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SARS-CoV-2 breakthrough infections following inactivated vaccine vaccination induce few neutralizing antibodies against the currently emerging Omicron XBB variants

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Virologica Sinica 2024年第1期39卷 173-176页

作者： Fan Shen Chun Liang Cui-Xian Yang Ying Lu An-Qi Li Ying Duan mi Zhang c Ren-Rong Tian a Xing-Qi Dong Yong-Tang Zheng Wei Pang Key Laboratory of Bioactive Peptides of Yunnan Province/Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences KIZ-CUHK Joint Laboratory of Bioresources and Molecular Research in Common DiseasesKunming Institute of ZoologyChinese Academy of SciencesKunming650223China University of Chinese Academy of Sciences Beijing100049China Yunnan Provincial Infectious Disease Hospital Kunming650399China Department of Pathogen Biology and Immunology Faculty of Basic Medical ScienceKunming Medical UniversityKunming650500China

Dear editor,COVID-19 inactivated vaccines have been extensively administered ***,the majority of the Chinese population has experiencedbreakthrough infections from SARS-CoV-2 ancestral,Delta or Omicronvariants over the past three years,particularly during the wave of Omicron ba.5 and ba.7 variants at the end of 2022(Zhu et al.,2023).Subsequently,new Omicron variants,such as BQ.1,BQ.1.1,XBB,XBB.1/XBB.1.9,and XBB.1.5/XBB.1.9.1,are emerging in China(Yueetal.,2023;Zhu et al.,2023).Therefore,it is an urgentneed and a publichealth imperative to assess the extent of the immunoprotection established in this population.

关键词： breakthrough neutral Omi

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Results of the First 10 Cases of Coronary Bypass Surgery in Senegal

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World Journal of Cardiovascular Surgery 2024年第4期14卷 45-60页

作者： Papa Amath Diagne Jean Claude Ndiogou Dione Papa Ousmane ba Momar Sokhna Diop El Hadji Bouba.a. ba Momar Dioum Marième Soda Mbaye Moussa Seck Diop Mory Camara Abdou Lahad Mbengue Abdou Aziz Thiaw Abdoul Khoudoss Diallo Moussa Mareme Samba Dialtabé Ibrahima Guéssé ba.a.ta Mbaye Sall Papa Salmaneba.a.adou Gabriel Ciss Department of Cardiovascular and Thoracic Surgery FANN National University Hospital Dakar Senegal

This is a review of the first 10 coronary artery bypass surgeries performed by the local team. The mean age was 62 years old [45 - 74]. The patients were predominantly male, with a M/F ratio of 4:1. Cardiovascular risk factors were mainly myocardial infarction (mi) (60%), hypertension (50%), obesity (40%) and diabetes (30%), with at least two risk factors per patient. Angina was the main symptom (80%). The average time from presentation to surgery was 8 months. The mean Euroscore 2 was 2.92 ± 1.65 [1.33 - 6.60]. Coronary angiography revealed an average of 2 lesions per patient, with 3-vessel involvement in 70% of cases: the Interventricular artery (IVA) (100%), the right coronary artery (90%) and the circumflex artery (70%). On echocardiography, the mean Left ventricular ejection fraction (LVEF) was 59% [33% - 76%]. All patients underwent median sternotomy with bypass grafting. The average duration of the cardiopulmonary bypass was 150 min [46 - 275 min];that of aortic clamping, 120 min [43 - 232 min]. The grafts used were internal thoracic artery (ITA) in 100% of cases (80% on the left and 20% on the right), and the great saphenous vein (GSV) in 60% of cases (50% on the left and 10 on the right). Double bypass was performed in 60% of cases, single bypass in 30% and triple bypass in 10%. The bypasses were performed on the IVA (100%), the middle lateral of the circumflex (30%) and the bisector (20%). The average time to extubation was 11 hours and the length of stay in the intensive care unit was 7 days [03 - 17 days]. One patient had a reoperation on Day 0 post-op. The average hospital stay was 13 days [06 - 27 days]. Complications occurred in nine of the patients (90%), with a predominance of infectious and neurological complications. Overall operative mortality was 3%, all in intensive care.

关键词： Coronary Bypass Surgery Coronary Lesions Cardiac Surgery Senegal

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在役15Cr1Mo1V钢再热蒸汽管道焊接接头组织及性能分析

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热加工工艺 2024年第15期53卷 66-68,76页

作者：张磊王艳松刘福广袁树斌米紫昊巴特尔华能伊敏煤电有限责任公司伊敏电厂内蒙古呼伦贝尔021130 西安热工研究院有限公司陕西西安710054

以某电厂在役的15Cr1Mo1V钢再热蒸汽管道焊接接头为研究对象,对其显微组织、硬度、室温和高温拉伸性能进行了分析。结果表明:再热蒸汽管道焊接接头热影响区和焊缝区的晶内及晶界处有颗粒状的析出物,接头组织出现老化现象。管道焊接接头... 详细信息

以某电厂在役的15Cr1Mo1V钢再热蒸汽管道焊接接头为研究对象,对其显微组织、硬度、室温和高温拉伸性能进行了分析。结果表明:再热蒸汽管道焊接接头热影响区和焊缝区的晶内及晶界处有颗粒状的析出物,接头组织出现老化现象。管道焊接接头热影响区和焊缝区的硬度较高,增加了管道脆性失效的风险。室温与高温拉伸结果表明焊缝的强度高于母材,塑性略低于母材,说明无论在室温还是高温环境下焊缝优先失效的风险均较低。

关键词：蒸汽管道焊接接头显微组织力学性能

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在役15Cr1Mo1V钢管道焊接接头显微组织与力学性能研究

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钢铁钒钛 2024年第2期45卷 198-204页

作者：王艳松刘福广米紫昊韩天鹏张磊杨二娟巴特尔西安热工研究院有限公司陕西西安710054 华能伊敏煤电有限责任公司伊敏电厂内蒙古呼伦贝尔021130

以某电厂运行约13万h的15Cr1Mo1V钢高温再热蒸汽管道焊接接头作为研究对象,对其显微组织、硬度、拉伸、冲击和失效位置进行了研究分析。结果表明,服役管道焊接接头各区域均有多边形铁素体和析出物,组织出现一定的老化现象。焊接接头各... 详细信息

以某电厂运行约13万h的15Cr1Mo1V钢高温再热蒸汽管道焊接接头作为研究对象,对其显微组织、硬度、拉伸、冲击和失效位置进行了研究分析。结果表明,服役管道焊接接头各区域均有多边形铁素体和析出物,组织出现一定的老化现象。焊接接头各区域硬度差异明显,焊缝中呈现多层多道焊典型的回火效应,盖面焊缝处硬度值普遍较高。焊接接头各区域拉伸和冲击结果均表明室温和高温下焊缝的强度均优于母材,但塑性和韧性均相对较差,特别是高温环境下焊缝的塑性和韧性下降较多;焊接接头拉伸和冲击断口显示母材断口中的韧窝数量多且韧窝较深,而焊缝中由于第二相的析出,尽管拉伸强度有所提高,但其均明显降低。

关键词： 15Cr1Mo1V钢高温再热蒸汽管道焊接接头显微组织力学性能

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新质农业劳动力培育对农作物生产的影响——以棉花生产为例

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财经科学 2024年第8期 135-148页

作者：米巧杜逍颖贾娟娟新疆财经大学公共管理学院

本文以棉花生产为例,从农业劳动力转移的角度出发,选取了2005—2021年中国22个棉花主产省份数据,运用中介效应模型实证分析了农业从业人员比例及农业人力资本存量对棉花生产的影响,得出以下结论:(1)整体来说,农业劳动力从业人员比例和... 详细信息

本文以棉花生产为例,从农业劳动力转移的角度出发,选取了2005—2021年中国22个棉花主产省份数据,运用中介效应模型实证分析了农业从业人员比例及农业人力资本存量对棉花生产的影响,得出以下结论:(1)整体来说,农业劳动力从业人员比例和农业人力资本存量的提升能够促进棉花总产量增加,而现阶段的土地流向不利于棉花总产量的提高。(2)从长江流域、黄河流域棉花主产区来看,无论是增加两个区域的农业人力资本存量和农业劳动力比例、还是提高土地流转率都将提升棉花总产量。(3)西北内陆地区在制定增加棉花总产量的政策时,需同时考虑现阶段低技能农业劳动力过剩及土地流向问题。根据以上结论,建议完善土地流转市场,提高新型经营主体承包率,降低撂荒可能性,并加强西北内陆地区农业劳动力技能培训,提升新质农业劳动力水平,解决低技能劳动力过剩问题。

关键词：新质农业劳动力农业劳动力转移农业人力资本存量土地流转棉花总产量

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Immobilization of functional nano-objects in living engineered bacterial biofilms for catalytic applications

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National Science Review 2019年第5期6卷 929-943页

作者： Xinyu Wang Jiahua Pu Yi Liu Fang ba Mengkui Cui Ke Li Yu Xie Yan Nie Qixi mi Tao Li Lingli Liu Manzhou Zhu Chao Zhong Division of Materials and Physical Biology School of Physical Science and TechnologyShanghai Tech University Shanghai Institute of Ceramics Chinese Academy of Sciences University of Chinese Academy of Sciences School of Life Science and Technology Shanghai Tech University Shanghai Institute for Advanced Immunochemical Studies (SIAIS) Shanghai Tech University College of Chemistry&Chemical Engineering Anhui University

Nanoscale objects feature very large surface-area-to-volume ratios and are now understood as powerful tools for catalysis, but their nature as nanomaterials brings challenges including toxicity and nanomaterial *** is considered a feasible strategy for addressing these ***, as a proof-of-concept for the immobilization of nanoscale catalysts in the extracellular matrix of bacterial biofilms, we genetically engineered amyloid monomers of the Escherichia coli curli nanofiber system that are secreted and can self-assemble and anchor nano-objects in a spatially precise *** demonstrated three scalable, tunable and reusable catalysis systems: biofilm-anchored gold nanoparticles to reduce nitro aromatic compounds such as the pollutant p-nitrophenol, biofilm-anchored hybrid Cd0.9Zn0.1S quantum dots and gold nanoparticles to degrade organic dyes and biofilm-anchored CdSeS@ZnS quantum dots in a semi-artificial photosynthesis system for hydrogen *** work demonstrates how the ability of biofilms to grow in scalable and complex spatial arrangements can be exploited for catalytic applications and clearly illustrates the design utility of segregating high-energy nano-objects from injury-prone cellular components by engineering anchoring points in an extracellular matrix.

关键词： nanoscale catalyst immobilization semi-artificial photosynthesis living catalysis bio-inorganic hybrid system hydrogen production

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Geometric positioning integrating optical satellite stereo imagery and a global database of ICESat-2 laser control points:A framework and key technologies

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Geo-Spatial Information Science 2023年第2期26卷 206-217页

作者： mi Wang Yu Wei Yingdong Pi State Key Laboratory of Information Engineering in Surveying Mapping and Remote SensingWuhan UniversityWuhanChina School of Resource and Environmental Sciences Wuhan UniversityWuhanChina

Block Adjustment(ba)is one of the essential techniques for producing high-precision geospatial 3D data products with optical stereo satellite *** block adjustment with few ground-control points or without ground control,the vertical error of the model is the decisive factor that constrains the accuracy of 3D data *** elevation data obtained by spaceborne laser altimeter have the advantages of short update periods,high positioning precision,and low acquisition cost,providing sufficient data support for improving the elevation accuracy of stereo models through the combined *** paper proposes a geometric positioning model based on the integration of Optical Satellite Stereo Imagery(OSSI)and spaceborne laser altimeter ***,we elaborate the principle and necessity of this work through a literature review of existing ***,the framework of our geo-positioning ***,four key technologies of the proposed model are expounded in order,including the acquisition and management of global Laser Control Points,the association of LCPs and OSSI,the block adjustment model combining LCPs with OSSI,and the accuracy estimation and quality control of the combined ***,the combined ba experiment using Ziyuan-3(ZY-3)OSSI and ICESat-2 laser data was carried out at the testing site in Shandong Province,*** results prove that our method can automatically select LCPs with high *** elevation deviation of the combined ba eventually achieved the Mean Error(ME)of 0.06 m and the Root Mean Square Error(RMSE)of 1.18 m,much lower than the ME of 13.20 m and the RMSE of 3.88 m before the block adjustment.A further research direction will be how to perform more adequate accuracy analysis and quality control using massive laser points as checkpoints.

关键词： Spaceborne laser altimeter ICESat-2 optical stereo imagery ZY-3 combined block adjustment block adjustment without ground control geometric positioning stereo mapping

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Strong-Stability-Preserving, K-Step, 5- to 10-Stage, Hermite-Birkhoff Time-Discretizations of Order 12

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American Journal of Computational Mathematics 2011年第2期1卷 72-82页

作者： Truong Nguyen-ba Huong Nguyen-Thu Re′mi Vaillancourt 不详

We construct optimal k-step, 5- to 10-stage, explicit, strong-stability-preserving Hermite-Birkhoff (SSP HB) methods of order 12 with nonnegative coefficients by combining linear k-step methods of order 9 with 5- to 10-stage Runge-Kutta (RK) methods of order 4. Since these methods maintain the monotonicity property, they are well suited for solving hyperbolic PDEs by the method of lines after a spatial discretization. It is seen that the 8-step 7-stage HB methods have largest effective SSP coefficient among the HB methods of order 12 on hand. On Burgers’ equations, some of the new HB methods have larger maximum effective CFL numbers than Huang’s 7-step hybrid method of order 7, thus allowing larger step size.

关键词： Strong Stability Preserving Hermite-Birkhoff Method SSP Coefficient Time Discretization Method of Lines Comparison with Other SSP Methods

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Polycyclic aromatic hydrocarbons in benthos of the northern Bering Sea Shelf and Chukchi Sea Shelf

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Journal of Environmental Sciences 2020年第11期32卷 194-199页

作者： Yuxin Ma Yurong Sun Yunkai Li Hongyuan Zheng Wenying mi School of Oceanography Shanghai Jiao Tong UniversityShanghai 200030China College of Marine Sciences Shanghai Ocean UniversityShanghai 201306China State Key Laboratory of Pollution Control and Resource Reuse College of Environmental Science and EngineeringTongji UniversityShanghai 200092China miNJIE Institute of Environmental Science and Health Research Max-Plank Street 2Geesthacht 21502Germany

Eighteen polycyclic aromatic hydrocarbons(PAHs)were detected in benthos collected onboard the‘Snow Dragon’in the Northern Bering Sea Shelf and Chukchi Sea Shelf during the 6 th Chinese National Arctic Research Expedition(CHINARE 2014).18 PAHs for all biota samples ranged from 34.2 to 128.1 ng/g dry weight(dw),with the highest concentration observed in fish muscle(Boreogadus saida)samples close to *** *** PAH composition pattern was dominated by the presence of lighter 3 ring(57%)and 2 ring(28%)PAHs,indicating oil-related or petrogenic sources as important origins of PAH *** of alkyl-PAHs(1-methylnaphthalene and 2-methylnaphthalene)were lower than their parent PAH(naphthalene)in all biological tissue,and their percentage also decreased significantly(pbarctic/Arctic shelf region,as well as a low assimilation/effective metabolism for *** to toxic potency evaluation results from TCDD toxic equivalents(TEQs)and ba P-equivalent(ba PE)values,whelk(Neptunea heros)and starfish(Ctenodiscus crispatus)are two macroinvertebrate species showing relatively higher dioxin-like toxicity and carcinogenic risk.

关键词： Polycyclic aromatic hydrocarbons Arctic shelf Benthos Toxic potency Bioaccumulation

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