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Effect of lanthanum on microstructure of a nickel-based single crystal superalloy

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China Foundry 2025年第1期22卷 55-64页

作者： hong Gao Kai Guan Ren-jie Cui Jian-chao qin Zi-han Zhao Zhao-hui Huang Science and Technology on Advanced High Temperature Structural Materials Laboratory Beijing Institute of Aeronautical MaterialsBeijing 100095China

To enhance the high-temperature oxidation resistance and mechanical properties of a secondgeneration nickel-based superalloy,various concentrations of lanthanum(La)ranging from 5.0×10^(-5)wt.%to 3.4×10^(-4)wt.%are added to the *** microstructure of the nickel-based single crystal superalloy with trace of La was examined by means of SEM,EDS and *** show the addition of La decreases the segregation of elements and increases the amount ofγ/γ′eutectics of the as-cast alloy,and in the interdendritic region,the growth of eutectics is accompanied by the growth of strip clusters composed of Ni_(5)La and Ni_(3)*** the La content in the alloy increases,the proportion of Ni_(5)La in the cluster *** heat treatment,incipient melting occurs in the cluster regions,leading to an increase in microporosity compared to the original as-cast ***,the heat treatment alters the shape of the clusters from a strip morphology to an elliptical one,and it changes their composition from Ni_(5)La and Ni_(3)Ta to a combination of Ni_(5)La,Ni_(3)Ta,and MC carbides.

关键词： single crystal superalloy lanthanum microstructure heat-treatment precipitate phase

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

High-temperature calcination dramatically promotes the activity of Cs/Co/Ce-Sn catalyst for soot oxidation

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Chinese Chemical Letters 2025年第1期36卷 534-538页

作者： Meng Wang yan Zhang Yunbo Yu Wenpo Shan hong He Center for Excellence in Regional Atmospheric Environment Institute of Urban EnvironmentChinese Academy of SciencesXiamen 361021China Zhejiang Key Laboratory of Urban Environmental Processes and Pollution Control Ningbo Urban Environment Observation and Research StationInstitute of Urban EnvironmentChinese Academy of SciencesNingbo 315800China State Key Joint Laboratory of Environment Simulation and Pollution Control Research Center for Eco-Environmental SciencesChinese Academy of SciencesBeijing 100085China University of Chinese Academy of Sciences Beijing 100049China

Catalytic oxidation of soot is of great importance for emission control on diesel *** this work,a highly active Cs/Co/Ce-Sn catalyst was investigated for soot oxidation,and it was unexpectedly found that high-temperature calcination greatly improved the activity of the *** the calcination temperature was increased from 500℃ to 750℃,T_(50) decreased from 456.9℃ to 389.8℃ in a NO/O_(2)/H_(2)O/N_(2) *** results revealed that high-temperature calcination can promote the ability to transfer negative charge density from Cs to other metal cations in Cs/Co/Ce-Sn,which will facilitate the production of more oxygen defects and the generation of more surface-active oxygen *** oxygen species are beneficial to the oxidation of NO to NO_(2),leading to the high yield of NO_(2) ***,the Cs/Co/Ce-Sn catalyst calcined at 750℃ demonstrated higher activity than that calcined at 500℃.This work provides a pathway to prepare high efficiency catalysts for the removal of soot and significant insight into the effects of calcination on soot oxidation catalysts.

关键词： Soot oxidation Calcination Surface defects Surface-active oxygen species NO_(2)

A smart finger patch with coupled magnetoelastic and resistive bending sensors

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Journal of Semiconductors 2025年第1期46卷 194-203页

作者： Ziyi Dai Mingrui Wang Yu Wang Zechuan Yu yan Li Weidong qin Kai Qian School of Integrated Circuits Shandong UniversityJinan 250100China Department of Mechanical Engineering University of AucklandAuckland 1010New Zealand Department of Urology Qilu Hospital of Shandong UniversityJinan 250100China Shenzhen Research Institute of Shandong University Shenzhen 518000China Department of Critical Care Medicine Qilu hospital of Shandong universityJinan 250100China

In the era of Metaverse and virtual reality(VR)/augmented reality(AR),capturing finger motion and force interactions is crucial for immersive human-machine *** study introduces a flexible electronic skin for the index finger,addressing coupled perception of both state and process in dynamic tactile *** device integrates resistive and giant magnetoelastic sensors,enabling detection of surface pressure and finger joint *** e-skin identifies three phases of finger action:bending state,dynamic normal force and tangential force(sweeping).The system comprises resistive carbon nanotubes(CNT)/polydimethylsiloxane(PDMS)films for bending sensing and magnetoelastic sensors(NdFeB particles,EcoFlex,and flexible coils)for pressure *** inward bending resistive sensor,based on self-assembled microstructures,exhibits directional specificity with a response time under 120 ms and bending sensitivity from 0°to 120°.The magnetoelastic sensors demonstrate specific responses to frequency and deformation magnitude,as well as sensitivity to surface roughness during sliding and material *** system’s capability is demonstrated through tactile-based bread type and condition recognition,achieving 92%*** intelligent patch shows broad potential in enhancing interactions across various fields,from VR/AR interfaces and medical diagnostics to smart manufacturing and industrial automation.

关键词： human machine interface flexible sensor wearable sensor giant magnetoelastic effect inward bending sensor

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我国农村产业生态化转型中的问题探讨

科技与经济 2011年第6期24卷 57-61页

作者：秦艳红山东财经大学经济与城市管理学院济南250014

在当前"转方式、调结构"的宏观经济背景下,农村地区的经济模式也面临生态化转型的压力。目前我国农村产业的生态化转型只是在低层次上实现了转变,尚存在很多突出问题,主要包括:一是对农村产业的生态化转型在认识上存在误区,简单地认为... 详细信息

在当前"转方式、调结构"的宏观经济背景下,农村地区的经济模式也面临生态化转型的压力。目前我国农村产业的生态化转型只是在低层次上实现了转变,尚存在很多突出问题,主要包括:一是对农村产业的生态化转型在认识上存在误区,简单地认为生态化转型就是要师法自然或者发展生态产业、循环经济;二是忽视了产业结构调整在生态化转型中的重要作用,产业结构的生态化调整进展缓慢,三是产业布局分散造成了资源浪费和生态环境的破坏,四是生态环境恶化和基础设施落后,严重制约了生态化转型的进程,五是转型所需人力、资金和技术支持明显不足。针对以上问题,提出加快农村产业生态化转型的对策建议。

关键词：农村产业体系产业生态化产业结构与布局生态基础设施

Sex differences in human pre-gastrulation embryos

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Science China(Life Sciences) 2025年第2期68卷 397-415页

作者： Yongjie Lu Meng qin Xintong Qi Ming yang Fan Zhai Jiaqi Zhang Zhiqiang yan Liying yan Jie Qiao Peng Yuan State Key Laboratory of Female Fertility Promotion Center for Reproductive MedicineDepartment of Obstetrics and GynecologyPeking University Third HospitalBeijing 100191China National Clinical Research Center for Obstetrics and Gynecology(Peking University Third Hospital) Beijing 100191China Key Laboratory of Assisted Reproduction(Peking University) Ministry of EducationBeijing 100191China Beijing Key Laboratory of Reproductive Endocrinology and Assisted Reproductive Technology Beijing 100191China Academy for Advanced Interdisciplinary Studies Peking UniversityBeijing 100871China

Human fetuses exhibit notable sex differences in growth rate and response to the intrauterine environment,yet their origins and underlying mechanisms remain ***,we conduct a detailed investigation of sex differences in human pre-gastrulation *** lower methylation and incomplete inactivation of the X chromosome in females,as well as the sex-specific cell-cell communication patterns,contribute to sex-differential *** trophectoderm is more inclined toward syncytiotrophoblast differentiation and exhibits a stronger hormone secretion capacity,while female trophectoderm tends to retain cytotrophoblast program with stronger mitochondrial function as well as higher vasculogenesis and immunotolerance *** primitive endoderm initiates the anterior visceral endoderm transcriptional program earlier than *** cell cycle activities of the epiblast and primitive endoderm are higher in males compared to females,while the situation is opposite in the *** conclusion,our study provides in-depth insights into the sex differences in human pre-gastrulation embryos and contributes to unraveling the origins of the sex differences in human fetal development.

关键词： human embryo sex difference trophectoderm primitive endoderm epiblast

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海洋产油真菌的简便初筛

台湾海峡 2010年第1期29卷 128-134页

作者：秦艳红叶德赞国家海洋局第三海洋研究所、国家海洋局海洋生物遗传资源重点实验室福建厦门361005

选取分离自大洋、深海的28株酵母和143株霉菌,采用在培养基中添加尼罗红比较表观荧光强度的方法来筛选出酵母2株和霉菌7株,但菌体呈红色的酵母(17株)及菌丝为黑色的霉菌(28株)不适用于此法;通过单位OD600荧光强度的高低筛选出1株菌落为... 详细信息

选取分离自大洋、深海的28株酵母和143株霉菌,采用在培养基中添加尼罗红比较表观荧光强度的方法来筛选出酵母2株和霉菌7株,但菌体呈红色的酵母(17株)及菌丝为黑色的霉菌(28株)不适用于此法;通过单位OD600荧光强度的高低筛选出1株菌落为微红色的酵母,产油性能好于用第一种方法挑选出的2株酵母,且菌体颜色对结果并无影响,但只适合筛选酵母.通过上述2种方法筛选出高油脂菌株,大多来源于深海.

关键词：海洋生物学尼罗红海洋油脂真菌脂肪酸方法

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国内外生态补偿现状及其完善措施

自然资源学报 2007年第4期22卷 557-567页

作者：秦艳红康慕谊北京师范大学资源学院资源管理研究所

通过回顾发达国家(如美国、欧洲国家)和发展中国家(如中国、拉丁美洲国家)在实施生态补偿过程中采取的各种措施,发现其中存在的一些问题。在此基础上,总结了生态补偿的运行机制,提出完善生态补偿机制的措施,即:界定受偿方和支付方,明确... 详细信息

通过回顾发达国家(如美国、欧洲国家)和发展中国家(如中国、拉丁美洲国家)在实施生态补偿过程中采取的各种措施,发现其中存在的一些问题。在此基础上,总结了生态补偿的运行机制,提出完善生态补偿机制的措施,即:界定受偿方和支付方,明确各自的权利与义务;以机会成本为理论依据,将受偿地区生态保护与经济社会发展综合考虑,设定具有差异性的补偿标准,并将补偿分为基本补偿、产业结构调整补偿以及生态效益外溢补偿3个阶段;综合受益程度、支付能力和支付意愿确定支付方的支付标准;建立融资渠道,有效配置资金;建立生态补偿组织管理体系。生态补偿机制应以“造血式”补偿为目标,在研究中需加强生态学与经济学理论与方法的交叉。

关键词：生态补偿生态服务支付方和受偿方补偿标准

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济南市地下水补给区水土流失研究

水土保持通报 2005年第2期25卷 87-91页

作者：王立红秦艳红山东师范大学人口资源与环境学院山东济南250014 北京师范大学资源学院资源管理研究所北京100875

在GIS软件的支持下,通过对降水、土壤、地形、植被、人类活动等方面的资料进行收集和处理,分别生成R,K,SL,C,P等各个因子栅格格式的分布图,然后代入通用土壤流失方程(USLE)进行各因子间空间叠加运算,最终得出研究区水土流失强度分布图... 详细信息

在GIS软件的支持下,通过对降水、土壤、地形、植被、人类活动等方面的资料进行收集和处理,分别生成R,K,SL,C,P等各个因子栅格格式的分布图,然后代入通用土壤流失方程(USLE)进行各因子间空间叠加运算,最终得出研究区水土流失强度分布图。对水土流失现状进行评价并对产生水土流失的原因进行分析,将研究区分为近郊地区、三川地区、南北沙河地区等3部分,最后分区域提出了水土流失的治理措施。

关键词：济南市地下水补给区水土流失通用土壤流失方程