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Visible-light-induced photocatalytic CO_(2)reduction over zirconium metal organic frameworks modified with different functional groups

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Journal of Environmental Sciences 2023年第10期132卷 22-30页

作者： Yuexian Du Guang’an Jie Huilin Jia Jiahui Liu jieyu wu Yanghe Fu Fumin Zhang Weidong Zhu Maohong Fan Key Laboratory of the Ministry of Education for Advanced Catalysis Materials Institute of Physical ChemistryZhejiang Normal UniversityJinhua 321004China Zhejiang Engineering Laboratory for Green Syntheses and Applications of Fluorine-Containing Specialty Chemicals Institute of Advanced Fluorine-Containing MaterialsZhejiang Normal UniversityJinhua 321004China Department of Chemical and Petroleum Engineering University of WyomingLaramieWY 82071USA

The reduction of CO_(2)into high value-added chemicals and fuels by a photocatalytic technology can relieve energy shortages and the environmental problems caused by greenhouse *** the current work,an amino-functionalized zirconium metal organic framework(Zr-MOF)was covalently modified with different functional groups via the condensation of Zr-MOF with 2-pyridinecarboxaldehyde(PA),salicylaldehyde(SA),benzaldehyde(BA),and trifluoroacetic acid(TA),named Zr-MOF-X(X=PA,SA,BA,and TA),respectively,through the post-synthesis *** with Zr-MOF and Zr-MOF-TA,the introduction of PA,SA,or BA into the framework of Zr-MOF can not only enhance the visible-light harvesting and CO_(2)capture,but also accelerate the photogenerated charge separation and transfer,thereby improving the photocatalytic ability of Zr-MOF for CO_(2)*** results indicate that the modification of Zr-MOF with electron-donating groups can promote the photocatalytic CO_(2)***,the current work provides an instructive approach to improve the photocatalytic efficiency of CO_(2)reduction through the covalent modification of MOFs.

关键词： Photocatalysis CO_(2)reduction Metal organic frameworks Post-synthesis modification Electric effect

PHA-4/FoxA senses nucleolar stress to regulate lipid accumulation in Caenorhabditis elegans

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PHA-4/FoxA senses nucleolar stress to regulate lipid accumul...

Exploring impacts of COVID-19 on spatial and temporal patterns of visitors to Canadian Rocky Mountain National Parks from social media big data

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作者： jieyu wu Bin Liang Key Laboratory of Animal Models and Human Disease Mechanisms of the Chinese Academy of Sciences Kunming Institute of ZoologyChinese Academy of Sciences

The primary function of the nucleolus is ribosome biogenesis,which is an extremely energetically expensive *** in ribosome biogenesis cause nucleolar stress with an altered energy ***,little is known about the underly...

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Journal of Forestry Research 2024年第4期35卷 13-33页

作者： Dehui Christina Geng Amy Li jieyu Zhang Howie W.Harshaw Christopher Gaston Wanli wu Guangyu Wang National Park Research Centre Faculty of ForestryUniversity of British ColumbiaVancouver V6T 1Z4Canada Faculty of Applied Science University of British ColumbiaVancouver V6T 1Z3Canada Paul G.Allen School of Computer Science&Engineering University of WashingtonSeattleWA 98195USA Faculty of Kinesiology Sportand RecreationUniversity of AlbertaEdmonton T6G 2J9Canada Department of Wood Science Faculty of ForestryUniversity of British ColumbiaVancouver V6T 1Z4Canada

COVID-19 posed challenges for global tourism *** in visitor temporal and spatial patterns and their associated determinants pre-and peri-pandemic in Canadian Rocky Mountain National Parks are *** was collected through social media programming and analyzed using spatiotemporal analysis and a geographically weighted regression(GWR)*** highlight that COVID-19 significantly changed park visitation *** tended to explore more remote areas *** GWR model also indicated distance to nearby trails was a significant influence on visitor *** results indicate that the pandemic influenced tourism temporal and spatial *** research presents a novel approach using combined social media big data which can be extended to the field of tourism management,and has important implications to manage visitor patterns and to allocate resources efficiently to satisfy multiple objectives of park management.

关键词： Tourism management Social media big data National parks COVID-19 Geographical weighted regression

收入差距与健康公平——基于2018年CFPS数据的实证研究

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财经科学 2020年第10期 121-132页

作者：冯科吴婕妤北京大学经济学院中国人民大学应用经济学院

在我国人均可支配收入水平不断提高的条件下,居民自身的健康问题逐渐受到重视。本文利用2018年CFPS调查数据,从社会阶层、城乡和区域三种类型的差距视角出发,探索不同差距视角下居民的绝对收入和相对收入对健康水平的影响。研究结果表明... 详细信息

在我国人均可支配收入水平不断提高的条件下,居民自身的健康问题逐渐受到重视。本文利用2018年CFPS调查数据,从社会阶层、城乡和区域三种类型的差距视角出发,探索不同差距视角下居民的绝对收入和相对收入对健康水平的影响。研究结果表明,居民的绝对收入和相对收入对健康水平都有显著的正向影响,即提高居民的收入有利于健康的改善;但不同的社会阶层之间、城乡之间以及不同地区之间的健康影响效应差距明显。

关键词：收入差距健康差距城乡差距

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陕北延川布堆文化意蕴及民俗符号分析

纺织高校基础科学学报 2023年第1期36卷 57-64页

作者：邱春婷吴婕妤西安工程大学服装与艺术设计学院陕西西安710048

为了促进陕北延川非遗布堆文化的传承与创新,针对陕北延川布堆画的视觉符号、行为符号和精神符号,剖析陕北延川布堆文化蕴含的生命群体意识,探索陕北延川布堆画承载的黄河文化和历史文化遗存。以符号学和设计学作为理论支撑,采用文献综... 详细信息

为了促进陕北延川非遗布堆文化的传承与创新,针对陕北延川布堆画的视觉符号、行为符号和精神符号,剖析陕北延川布堆文化蕴含的生命群体意识,探索陕北延川布堆画承载的黄河文化和历史文化遗存。以符号学和设计学作为理论支撑,采用文献综述法、田野调查法、对比分析法归纳整理陕北延川布堆画艺术特征和审美内涵。根据皮尔斯符号学划分的图像符号、指示符号、象征符号剖析陕北延川布堆画的造型、色彩、纹样的表象特征及象征意义的表意内涵,剖析陕北延川布堆画的文化根源。研究表明陕北布堆画的视觉特征符合符号学理论构建,具备符号学赋予的内涵,符号学方法的构建为陕北布堆画的研究及设计实践提供新的思路。

关键词：延川布堆文化皮尔斯符号学文化意蕴民俗符号表象特征表意内涵

纤维含量对VARTM制备竹纤维/环氧树脂复合材料性能影响

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复合材料学报 2022年第3期39卷 1249-1258页

作者：施江靖陈红张文福吴婕妤南京林业大学家居与工业设计学院南京210037 浙江省林业科学研究院杭州310023

纤维含量是影响真空辅助树脂传递模塑成型(VARTM)技术制备高性能纤维复合材料的关键因素之一,通过考察竹纤维(BF)含量对VARTM成型过程中环氧树脂(EP)浸渍BF效果及BF/EP复合材料性能的影响,为竹纤维复合材料实际应用提供理论支撑。利用... 详细信息

纤维含量是影响真空辅助树脂传递模塑成型(VARTM)技术制备高性能纤维复合材料的关键因素之一,通过考察竹纤维(BF)含量对VARTM成型过程中环氧树脂(EP)浸渍BF效果及BF/EP复合材料性能的影响,为竹纤维复合材料实际应用提供理论支撑。利用湿法层铺工艺将竹纤维束制作成竹纤维毡,再利用VARTM成型工艺制备出BF含量为0wt%、15wt%、25wt%、35wt%和45wt%的BF/EP复合材料。采用ESEM、超景深显微镜、力学试验机、TG、DMA对BF/EP复合材料的树脂浸渍纤维效果、吸水性、力学性能和耐热性能进行表征。研究结果表明:EP注射难度随BF含量增加而增大,BF/EP复合材料的吸水率随BF含量的增加逐步增加,35wt%时显著增加。随着BF含量的增加BF之间机械互锁性更强,能有效分散复合材料破坏应力,45wt%的BF/EP复合材料与15wt%相比弯曲强度、弯曲模量、剪切强度和冲击韧性分别提升了84%、64%、103%和101%。BF含量的增加使BF/EP复合材料在380℃之前热解速率加快,在此之后热解速率减缓,当BF含量多于35wt%时,BF/EP复合材料中的BF热分解剩余的无定形碳作为保护层能减少挥发性降解产物渗透到BF/EP复合材料中延缓热解反应。BF含量为45wt%时,致密的竹纤维毡能够限制树脂分子链段运动从而提高BF/EP复合材料的耐热性。当有高性能、低成本、使用场景为室内需求时可采用BF含量为45wt%制备BF/EP复合材料。

关键词：竹纤维 VARTM 纤维含量复合材料植物纤维复合材料环氧树脂

Perivascular localized cells commit erythropoiesis in PDGF-B-expressing solid tumors

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Cancer Communications 2023年第6期43卷 637-660页

作者： Kayoko Hosaka Chenchen Wang Shiyue Zhang Xue Lv Takahiro Seki Yin Zhang Xu Jing jieyu wu Qiqiao Du Xingkang He Yulong Fan Xuan Li Makoto Kondo Masahito Yoshihara Hong Qian Lihong Shi Ping Zhu Yuanfu Xu Yunlong Yang Tao Cheng Yihai Cao Department of Microbiology Tumor and Cell BiologyKarolinska InstituteStockholmSweden State Key Laboratory of Experimental Hematology National Clinical Research Center for Blood DiseasesHaihe Laboratory of Cell EcosystemInstitute of Hematology&Blood Diseases HospitalChinese Academy of Medical Sciences&Peking Union Medical CollegeTianjinP.R.China Tianjin Institutes of Health Science TianjinP.R.China School of Pharmacology Binzhou Medical UniversityYantaiShandongP.R.China Department of Clinical Laboratory the Second Hospital of Shandong UniversityJinanShandongP.R.China Department of Gastroenterology Sir Run Run Shaw HospitalZhejiang University Medical SchoolHangzhouZhejiangP.R.China Center for Hematology and Regenerative Medicine Department of MedicineKarolinska InstituteKarolinska University HospitalStockholmSweden Department of Biosciences and Nutrition Karolinska InstituteHuddingeSweden Department of Cellular and Genetic Medicine School of Basic Medical SciencesFudan UniversityShanghaiP.R.China

Background:Tumors possess incessant growth features,and expansion of their masses demands sufficient oxygen supply by red blood cells(RBCs).In adult mammals,the bone marrow(BM)is the main organ regulating hematopoiesis with dedicated *** than BM,extramedullary hematopoiesis is discovered in various pathophysiological ***,whether tumors can contribute to hematopoiesis is completely *** evidence shows that,in the tumor microenvironment(TME),perivascular localized cells retain progenitor cell properties and can differentiate into other ***,we sought to better understand whether and how perivascular localized pericytes in tumors manipulate ***:To test if vascular cells can differentiate into RBCs,genome-wide expression profiling was performed using mouse-derived *** tracing of perivascular localized cells employing NG2-CreERT2:R26R-tdTomato mouse strain was used to validate the findings in ***-activated cell sorting(FACS),single-cell sequencing,and colony formation assays were applied for biological *** production of erythroid differentiationspecific cytokine,erythropoietin(EPO),in TME was checked using quantitative polymerase chain reaction(qPCR),enzyme-linked immunosorbent assay(ELISA,magnetic-activated cell sorting and *** investigate BM function in tumor erythropoiesis,BM transplantation mouse models were ***:Genome-wide expression profiling showed that in response to plateletderived growth factor subunit B(PDGF-B),neural/glial antigen 2(NG2)+perivascular localized cells exhibited hematopoietic stem and progenitor-like features and underwent differentiation towards the erythroid ***-B simultaneously targeted cancer-associated fibroblasts to produce high levels of EPO,a crucial hormone that necessitates *** analysis using genetic tracing of NG2+cells in tumors defined the perivascular localized cell-derived sub

关键词： cancer hematopoiesis PDGF-B perivascular localized cell stem cell tumor vasculature

基于真空辅助树脂传递模塑成型不同纤维形态竹纤维复合材料性能研究

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复合材料学报 2022年第6期39卷 2930-2940页

作者：施江靖陈红张文福吴婕妤徐祥南京林业大学家居与工业设计学院南京210037 浙江省林业科学研究院杭州310023

为探索不同形态竹纤维(BF)对真空辅助树脂传递模塑成型(VARTM)过程中环氧树脂(EP)浸渍纤维效果及BF/EP复合材料性能的影响,采用经机械碾压2次、3次、4次得到3种不同形态的BF(BF-2、BF-3和BF-4),通过湿法层铺工艺将BF制作成竹纤维毡(BFM)... 详细信息

为探索不同形态竹纤维(BF)对真空辅助树脂传递模塑成型(VARTM)过程中环氧树脂(EP)浸渍纤维效果及BF/EP复合材料性能的影响,采用经机械碾压2次、3次、4次得到3种不同形态的BF(BF-2、BF-3和BF-4),通过湿法层铺工艺将BF制作成竹纤维毡(BFM),再利用VARTM制备出纤维含量为45wt%的复合材料BF-2/EP、BF-3/EP和BF-4/EP。采用ESEM、超景深显微镜、力学试验机、TG、DMA和Micro-CT对BF、BFM和BF/EP复合材料性能进行表征。研究结果表明:随纤维长度减小、纤维分离度增加,导致湿法层铺成型的BFM蓬松度降低,树脂注射难度增大,BFM-4在树脂注射时会发生纤维堆积,BF-3/EP复合材料吸水率最低。BF-2的长度较长、分离度低,虽保持了BF束自身结构与性能,但是与树脂界面结合性能差,长度与分离度适中的BF-3制备的复合材料力学性能最佳,弯曲强度、弹性模量、剪切强度和冲击韧性分别为97.90 MPa、7.2 GPa、17.01 MPa和8.11 kJ/m^(2)。BF加速了BF/EP复合材料的热解,BF-4/EP复合材料因BF-4中半纤维素含量少,热解温度有所提高。BF能够提升EP的刚性,BF-3与树脂界面结合最佳,孔隙体积占比仅为0.04%,BF-3/EP复合材料储能模量最大值高达5198 MPa。使用VARTM制备BF/EP复合材料时,BF尺寸与分离度是影响纤维与树脂界面结合性能和BF/EP复合材料性能的关键因素。

关键词：竹纤维湿法层铺工艺 VARTM 纤维形态竹纤维复合材料

三江流域(云南区段)耕地非粮化空间格局及驱动因素

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北京大学学报（自然科学版） 2024年第5期60卷 893-904页

作者：石婕妤吴秀芹董贵华北京林业大学水土保持学院北京100083 中国环境监测总站国家环境保护环境监测质量控制重点实验室北京100012

为厘清中国西南典型丘陵山区的耕地非粮化态势并提供针对性的管控策略,以三江流域(云南区段)为研究区,探究该地区非粮化的空间格局及驱动因素,从耕地资源禀赋、社会经济因素和农业投入因素3个角度来识别非粮化的驱动力,划分非粮化的驱... 详细信息

为厘清中国西南典型丘陵山区的耕地非粮化态势并提供针对性的管控策略,以三江流域(云南区段)为研究区,探究该地区非粮化的空间格局及驱动因素,从耕地资源禀赋、社会经济因素和农业投入因素3个角度来识别非粮化的驱动力,划分非粮化的驱动类型,得到如下结果表明。1)2019年三江流域(云南区段)非粮化总面积为100.41万hm^(2),非粮化率均值为34.69%,其中金沙江流域中各县级单元的非粮化程度明显高于怒江和澜沧江流域。2)粮食单位产出量、乡村人口占比、坡度和人均耕地面积是耕地非粮化的重要驱动因子。3)耕地非粮化的驱动类型可划分为资源驱动型、劳动力驱动型和经济驱动型,其中劳动力驱动型是区域内主要的驱动类型,经济驱动型均为县级市或市辖区,资源驱动型主要分布在经济驱动型的周围。根据不同驱动类型的县域,寻求耕地非粮化的不同管控途径,有助于为国家粮食安全和耕地保护政策调整提供科学依据。

关键词：耕地非粮化随机森林驱动类型三江流域