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Tailoring thermoelectric properties of Zr(0.43)Hf(0.57)NiSn half-Heusler compound by defect engineering

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Rare Metals 2020年第6期39卷 659-670页

作者： Krzysztof Galazka wenjie xie Sascha Populoh Myriam H.Aguirre Songhak Yoon Gesine Büttner Anke Weidenkaff Institute of Plasma Physics and Laser Microfusion Warsaw 01-497Poland Department of Materials Science Technische Universitat DarmstadtDarmstadt 64287Germany Laboratory for Solid State Chemistry and Catalysis EmpaDlibendorf 8600Switzerland Instituto de Nanociencia de Aragon Universidad de ZaragozaSaragossa 50018Spain Departamento de Fisica de la Materia Condensada Universidad de ZaragozaSaragossa 50009Spain Laboratorio de Microscopias Avanzadas Universidad de ZaragozaSaragossa 50018Spain Fraunhofer Research Institution for Materials Recycling and Resource Strategies IWKS Hanau 63457Germany

The thermoelectric transport properties of Zr0.43Hf0.57 NiSn half-Heusler compounds were investigated for samples sintered with different spark plasma sintering(SPS)periods:8,32 and 72 *** means of scanning transmission electron microscopy with a highangular annular dark-field detector(STEM-HAADF),it was found that sintering time affected the defect concentration,namely the amount of Ni interstitial atoms,and created locally ordered inclusions of full-Heusler *** structural information,phase composition and electrical transport properties could be consistently explained by the assumption that Ni interstitials give rise to an impurity band situated about 100 meV below the bottom of the conduction band via a self-doping *** impurity band was found to merge with the conduction band for the sample with intermediate SPS *** effect was ascribed to the gradual dissolution of full-Heusler phase inclusions and production of interstitial Ni defects,which eventually vanished for the sample with the longest sintering *** was demonstrated that the modification of the density of states near the edge of the conduction band and enhanced overall charge carrier concentration provided by defect engineering led to overall 26%increase in the thermoelectric figure of merit(ZT)with respect to the other samples.

关键词： Thermoelectric Half-Heusler Interstitial Defect engineering

Characterization and expression analysis of gonad specific igf3 in the medaka ovary

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Aquaculture and Fisheries 2022年第3期7卷 259-268页

作者： Jiale xie Ying Zhong Yuli Zhao wenjie xie Jing Guo Lang Gui Mingyou Li International Research Center for Marine Biosciences Ministry of Science and TechnologyShanghai Ocean UniversityChina Key Laboratory of Exploration and Utilization of Aquatic Genetic Resources Ministry of EducationShanghai Ocean UniversityShanghai201306China

The gonad specific expression of insulin-like growth factor 3(igf3)has suggested an important role of igf3 in fish *** this study,medaka igf3 was isolated and its expression patterns were compared with igf1,and germ cell gene vasa in adult medaka *** cloning and sequencing showed that the open reading frame(ORF)of medaka igf3 was comprised of 501 nucleotides and encoded 166 amino acid *** transcription polymerase chain reaction(RT-PCR)analysis showed that igf3 RNA was specifically expressed in developing embryos and adult gonads of both *** time quantitative PCR(q-PCR)indicated that igf3 expression was gradually increased during oogenesis,and reached its highest level at stage *** Chromogenic and fluorescent in situ hybridization,igf3 was shown to be present in the germ cells of oogonia and in oocytes at stages I-III,as well as abundant in granulosa cells and theca cells of oocytes at stages *** addition,igf3 and igf1 were expressed mutually in the outer theca cells of stage V oocytes in ***,we demonstrated that gonad specific igf3 could mark medaka ovarian somatic cells and germ *** findings highlight the importance of igf3 during ovarian development.

关键词： igf3 igf1 Medaka Ovary

Advancing oxygen separation:insights from experimental and computational analysis of La_(0.7)Ca_(0.3)Co_(0.3)Fe_(0.6)M_(0.1)O_(3-δ)(M=Cu,Zn)oxygen transport membranes

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Frontiers of Chemical Science and Engineering 2024年第6期18卷 17-29页

作者： Guoxing Chen Wenmei Liu Marc Widenmeyer Xiao Yu Zhijun Zhao Songhak Yoon Ruijuan Yan wenjie xie Armin Feldhoff Gert Homm Emanuel Ionescu Maria Fyta Anke Weidenkaff Fraunhofer Research Institution for Materials Recycling and Resource Strategies IWKS Alzenau 63755Germany Electrochemistry Laboratory Paul Scherrer InstituteVilligen PSI 5232Switzerland Department of Materials and Earth Sciences Materials and ResourcesTechnical University of DarmstadtDarmstadt 64287Germany Institute of Physical Chemistry and Electrochemistry Leibniz University HannoverHannover 30167Germany Institute for Computational Physics University of StuttgartStuttgart 70569Germany Computational Biotechnology RWTH AachenAachen 52074Germany

In this study,perovskite-type La_(0.7)Ca_(0.3)Co_(0.3)Fe_(0.6)M_(0.1)O_(3-δ)(M=Cu,Zn)powders were synthesized using a scalable reverse co-precipitation method,presenting them as novel materials for oxygen transport *** comprehensive study covered various aspects including oxygen permeability,crystal structure,conductivity,morphology,CO_(2) tolerance,and long-term regenerative durability with a focus on phase structure and *** membrane La_(0.7)Ca_(0.3)Co_(0.3)Fe_(0.6)M_(0.1)O_(3-δ)exhibited high oxygen permeation fluxes,reaching up to 0.88 and 0.64 mL·min^(−1)·cm^(−2) under air/He and air/CO_(2) gradients at 1173 K,*** 1600 h of CO_(2) exposure,the perovskite structure remained intact,showcasing superior CO_(2) resistance.A combination of first principles simulations and experimental measurements was employed to deepen the understanding of Cu/Zn substitution effects on the structure,oxygen vacancy formation,and transport behavior of the *** findings underscore the potential of this highly CO_(2)-tolerant membrane for applications in high-temperature oxygen *** enhanced insights into the oxygen transport mechanism contribute to the advancement of next-generation membrane materials.

关键词： perovskite oxygen permeation membrane oxygennionsdiffusiono xygen vacancy formation energy energy barrier

Advancing insights into in vivo meningeal lymphatic vessels with stereoscopic wide-field photoacoustic microscopy

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Light(Science & Applications) 2024年第5期13卷 894-907页

作者： Fei Yang Zhiyang Wang Wenbin Shi Miao Wang Rui Ma Wuyu Zhang Xipeng Li Erqi Wang wenjie xie Zhan Zhang Qi Shen Feifan Zhou Sihua Yang MOE Key Laboratory of Laser Life Science&Institute of Laser Life Science South China Normal UniversityGuangzhou 510631China. Guangdong Provincial Key Laboratory of Laser Life Science College of BiophotonicsSouth China Normal UniversityGuangzhou 510631China. Key Laboratory of Biomedical Engineering of Hainan Province School of Biomedical EngineeringHainan UniversityHaikou 570100China. Department of Neurology Sun Yatsen Memorial HospitalSun Yat-sen UniversityGuangzhou 510120China. Guangdong Province Key Laboratory of Brain Function and Disease Zhongshan School of MedicineSun Yat-sen UniversityGuangzhou 510120China. Guangdong Basic Research Center of Excellence for Structure and Fundamental Interactions of Matter South China Normal UniversityGuangzhou 510006China

Meningeal lymphatic vessels(mLVs)play a pivotal role in regulating metabolic waste from cerebrospinal fluid(CSF).However,the current limitations in field of view and resolution of existing imaging techniques impede understanding the stereoscopic morphology and dynamic behavior of mLVs in ***,we utilized dual-contrast functional photoacoustic microscopy to achieve wide-field intravital imaging of the lymphatic system,including mLVs and glymphatic *** stereoscopic photoacoustic microscopy based on opto-acoustic confocal features has a depth imaging capability of 3.75 mm,facilitating differentiation between mLVs on the meninges and glymphatic pathways within the brain ***,using this imaging technique,we were able to visualize the dynamic drainage of mLVs and identify a peak drainage period occurring around 20–40 min after injection,along with determining the flow direction from CSF to lymph ***,in the Alzheimer’s disease(AD)mouse model,we observed that AD mice exhibit a~70%reduction in drainage volume of mLVs compared to wild-type *** the development of AD,there is be continued decline in mLVs drainage *** finding clearly demonstrates that the AD mouse model has impaired CSF *** study opens up a horizon for understanding the brain’s drainage mechanism and dissecting mLVs-associated neurological disorders.

关键词： lymphatic impaired field

三元乙丙橡胶基吸油树脂型相变储能材料的相变过程

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高分子材料科学与工程 2014年第12期30卷 155-159页

作者：周晓明谢文杰天津科技大学材料科学与化学工程学院天津300457

分别以聚乙二醇(PEG)、石蜡为相变物质,三元乙丙橡胶(EPDM)基吸油树脂为骨架支撑材料,通过吸油树脂对相变物质的吸附作用,制备了高分子固-固相变材料。使用红外光谱和差示扫描量热法对相变材料的结构和相变行为进行了研究;同时,采用偏... 详细信息

分别以聚乙二醇(PEG)、石蜡为相变物质,三元乙丙橡胶(EPDM)基吸油树脂为骨架支撑材料,通过吸油树脂对相变物质的吸附作用,制备了高分子固-固相变材料。使用红外光谱和差示扫描量热法对相变材料的结构和相变行为进行了研究;同时,采用偏光显微镜的反射模式对相变材料的动态相变过程进行了观察。研究结果表明:在相变储能材料中,相变物质石蜡与PEG的熔融相转变焓分别为140.8 k J/g和7.5 k J/g;结晶相转变焓分别为137.2 k J/g和2.8 k J/g;在动态升/降温的相转变过程中,可观察到相变物质在吸油树脂网络中的熔体流动/凝固状态;相变过程中相变物质未发生泄漏,具有可逆的相转变特性。

关键词：聚乙二醇石蜡固-固相变吸油树脂

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基于树型贝叶斯网络的场景分类引擎训练算法

仪器仪表学报 2012年第4期33卷 863-869页

作者：王中锋王志海解文杰北京市劳动保护科学研究所安全与应急管理研究室北京100054 北京交通大学计算机与信息技术学院北京100044

贝叶斯网络在场景分类统计模型设计中得到广泛的应用。但现有的大部分贝叶斯网络场景分类引擎没有能够充分利用贝叶斯网络丰富的知识表现能力和有效的自动学习能力。首先提出了一种灵活的树型贝叶斯网络分类引擎,用于场景分类模型的设... 详细信息

贝叶斯网络在场景分类统计模型设计中得到广泛的应用。但现有的大部分贝叶斯网络场景分类引擎没有能够充分利用贝叶斯网络丰富的知识表现能力和有效的自动学习能力。首先提出了一种灵活的树型贝叶斯网络分类引擎,用于场景分类模型的设计。然后,以条件对数似然评价为标准研究这种模型的自动学习方法,通过对分类器等价类的研究,证明了树型贝叶斯网络分类引擎自动训练过程可以忽略网络中边的方向,并提出了一个不需要对边重定向的学习算法。由于通常的场景图像编码维度较高,省略了边的重定向过程能够有效地减少模型的训练时间。实验结果验证了所提算法的平均训练时间在基准场景图像库上比传统算法的减少23.32%。

关键词：机器学习模式识别计算机视觉场景分类贝叶斯网络网络结构学习

红细胞生成素对骨髓巨核系祖细胞体外生长的影响

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中华血液学杂志 1990年第4期11卷 177-178页

作者：谢文洁胡钧培上海第二医科大学瑞金医院上海血液学研究所

用改良的血浆凝块法，观察红细胞生成素（Epo)对巨核系祖细胞生长的影响。发现单用Epo可对典浆凝块法体系中的CFU-MK有轻度促进作用，而小剂量Epo （ 500IU/L ）与1 / 4~1 / 2常规用量的PhA/LCM （即1.25%~2.5%的PHA -LCM）并用，其CFU... 详细信息

用改良的血浆凝块法，观察红细胞生成素（Epo)对巨核系祖细胞生长的影响。发现单用Epo可对典浆凝块法体系中的CFU-MK有轻度促进作用，而小剂量Epo （ 500IU/L ）与1 / 4~1 / 2常规用量的PhA/LCM （即1.25%~2.5%的PHA -LCM）并用，其CFU-MK的产率比单用PHA-LCM时明显增高。提示Epo可能也参与了CFU-MK增殖与分化的调控。

关键词：红细胞生长素巨核采祖细胞

含环糊精空腔结构三元乙丙橡胶基吸油树脂的合成与性能

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高分子材料科学与工程 2014年第11期30卷 6-9页

作者：周晓明谢文杰霍云鹏天津科技大学材料科学与化学工程学院天津300457

通过将β-环糊精(β-CD)与甲基丙烯酸缩水甘油酯(GMA)在4-二甲氨基吡啶(DMAP)的催化作用下进行酯交换反应,在环糊精上引入多重双键结构,制备改性β-CD。采用悬浮聚合法,以三元乙丙橡胶(EPDM)为大分子单体,以不含极性基团的烯烃分子苯乙... 详细信息

通过将β-环糊精(β-CD)与甲基丙烯酸缩水甘油酯(GMA)在4-二甲氨基吡啶(DMAP)的催化作用下进行酯交换反应,在环糊精上引入多重双键结构,制备改性β-CD。采用悬浮聚合法,以三元乙丙橡胶(EPDM)为大分子单体,以不含极性基团的烯烃分子苯乙烯、改性β-CD为共聚单体进行三元共聚合,得到一种含环糊精空腔结构的新型高吸油树脂。采用傅里叶变换红外光谱、核磁共振、热重分析等表征手段对吸油树脂的结构、重复吸油性能及外场作用下的放油行为进行研究。研究结果表明,EPDM基吸油树脂中,环糊精空腔结构的引入显著提高了吸油树脂的吸油倍率和吸油速率;吸油树脂重复使用后,吸油倍率保持稳定;吸油树脂的放油速率受到压力、温度等外场因素的影响。

关键词：环糊精三元乙丙橡胶吸油树脂

长链非编码RNA FER1L4在肾癌组织中的表达及其对肾癌细胞增殖侵袭和迁移的影响

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中国肿瘤临床 2021年第17期48卷 882-886页

作者：雷坤阳谢文杰孙庭南昌大学第一附属医院泌尿外科南昌市330000

目的:探讨长链非编码RNA(long non-coding RNA,LncRNA)FER1L4在肾癌组织中的表达及其在体外肾癌细胞增殖、侵袭和迁移中的作用。方法:通过GEPIA数据库分析523例患者的肾癌组织和其中100例患者的配对癌旁组织中的LncRNA FER1L4表达,及51... 详细信息

目的:探讨长链非编码RNA(long non-coding RNA,LncRNA)FER1L4在肾癌组织中的表达及其在体外肾癌细胞增殖、侵袭和迁移中的作用。方法:通过GEPIA数据库分析523例患者的肾癌组织和其中100例患者的配对癌旁组织中的LncRNA FER1L4表达,及516例肾癌患者的组织标本与其生存期之间的关系。收集2020年1月至2021年1月65例于南昌大学第一附属医院行肾癌根治术患者的肾癌组织及癌旁组织标本,定量逆转录聚合酶链式反应(reverse transcription-quantitative polymerase chain reaction,RT-qPCR)检测患者的肾癌组织中的LncRNA FER1L4表达,并分析其与患者临床病理学特征的相关性。构建LncRNA FER1L4沉默肾癌786-O和OSRC2细胞株,利用CCK8、划痕、Transwell以及平板克隆实验检测LncRNA FER1L4对体外肾癌细胞增殖、侵袭及迁移的影响。Western blot检测上皮-间质转化(epithelial-mesenchymal transition,EMT)通路相关蛋白的表达变化。结果:GEPIA数据库分析结果表明,LncRNA FER1L4在肾癌的表达明显高于其癌旁组织,并且其表达与生存期呈负相关(P<0.001)。RT-qPCR结果显示,65例患者的肾癌组织中的LncRNA FER1L4表达为8.63±1.79,明显高于癌旁组织的1.84±0.95,两者比较差异具有统计学意义(P<0.001)。肾癌组织中的LncRNA FER1L4高表达与患者肿瘤直径、肿瘤分期、淋巴结转移及远处转移显著相关(均P<0.05)。CCK8、划痕、Transwell以及平板克隆实验结果显示,沉默LncRNA FER1L4表达后,肾癌786-O和OSRC2细胞的增殖、迁移及侵袭能力均明显减弱(均P<0.05)。Western blot检测显示,肾癌786-O和OSRC2细胞中沉默LncRNA FER1L4,Vimentin和N-cadherin表达下调,E-cadherin表达上调(均P<0.05)。结论:肾癌中LncRNA FER1L4高表达,并且与患者的肿瘤直径、肿瘤分期、淋巴结转移及远处转移相关。LncRNA FER1L4促进肾癌进展的作用可能部分与EMT相关。

关键词：肾细胞癌 LncRNA FER1L4 EMT