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Journal of Materiomics 2020年第2期6卷 293-299页

作者： Yong Du Jiageng Chen Qiufeng Meng Jiayue Xu Biplab Paul per eklund School of Materials Science and Engineering Shanghai Institute of Technology100 Haiquan RoadShanghai201418China Thin Film Physics Division Department of PhysicsChemistryand Biology(IFM)Link€oping UniversitySE-58183Link€opingSweden

Flexible ternary carbon black/Bi_(2)Te_(3) based alloy/polylactic acid(CB/BTBA/PLA)composites were fabricated by additive manufacturing and their thermoelectric properties were investigated from 300 K to 360 *** 300 K,as the mass ratios of BTBAs in the composites increased from 38.5% to 71.4%,both the electrical conductivity and Seebeck coefficient of the composites increased from 5.8 S/cm to 13.3 S/cm,and from 60.2 mV/K to 119.9 mV/K,respectively,and the thermal conductivity slightly increased from 0.15 W m^(-1)K^(-1) to 0.25 W m^(-1)K^(-1),as a result,the ZT value of the composites increased from 0.004 to *** the temperature increased from 300 K to 360 K,the electrical conductivity of all the composites slightly decreased,while the thermal conductivity slowly increased,and a highest ZT value of 0.024 was achieved for the composites with 71.4% BTBAs at 320 *** traditional sterolithography,fused deposition modeling,selective laser melting,etc.,this additive manufacturing process can directly print the solutions which contain inorganic fillers and polymer matrixes into almost any designed intricate geometries of thermoelectric composites,therefore this process has great potential to be used for fabrication of flexible polymer based thermoelectric composites and devices.

关键词： Flexible Bi_(2)Te_(3)based alloy Additive manufacturing Thermoelectric

Al/Mo-C中间层对锆合金表面Zr_(2)Al_(3)C_(4)涂层界面性能影响

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无机材料学报 2021年第5期36卷 541-546页

作者：叶文浩魏强梁佳敏周洁孟凡平 eklund per 黄庆天津大学材料科学与工程学院天津300350 中国科学院宁波材料技术与工程研究所新能源技术研究所宁波315201 河北工业大学机械工程学院天津300130 Department of Physics Chemistryand Biology(IFM)Linköping UniversityLinköping 58183Sweden

锆合金表面涂层研究作为提高核燃料包壳事故容错能力的重要技术手段之一,能够有效解决失水事故下锆水反应的问题。Zr_(2)Al_(3)C_(4)以其优异的抗氧化性能和适用于核环境的化学组分而成为锆合金包壳的候选涂层材料之一。由于Zr_(2)Al_(3... 详细信息

锆合金表面涂层研究作为提高核燃料包壳事故容错能力的重要技术手段之一,能够有效解决失水事故下锆水反应的问题。Zr_(2)Al_(3)C_(4)以其优异的抗氧化性能和适用于核环境的化学组分而成为锆合金包壳的候选涂层材料之一。由于Zr_(2)Al_(3)C_(4)涂层与锆合金基底之间的元素扩散以及热膨胀系数不匹配等问题,在其上制备Zr_(2)Al_(3)C_(4)涂层的相关研究较少。本研究通过磁控溅射结合后续热处理工艺,以Al/Mo-C作为扩散屏障层,在锆合金基底上制备Zr_(2)Al_(3)C_(4)涂层。结合X射线衍射仪、扫描电子显微镜和透射电子显微镜等分析手段,研究了Al/Mo-C中间层对涂层的相和微观结构的影响。结果表明,在800℃退火3 h后,未添加中间层的涂层开裂,同时由于Zr-Al-C涂层与基底之间存在明显的元素扩散,导致Zr_(2)Al_(3)C_(4)无法成相。Al/Mo-C中间层作为扩散屏障,能够有效阻止退火过程中Zr-Al-C涂层和基底之间的元素扩散,从而大大降低Zr-Al-C涂层与标准化学量比的偏差,有利于最终涂层中Zr_(2)Al_(3)C_(4)相的形成。此外,该扩散屏障层能够抑制Zr_(2)Al_(3)C_(4)涂层在退火过程中产生裂纹,同时将退火态涂层与锆合金基底的结合力提高30 N。

关键词： Zr_(2)Al_(3)C_(4) 中间层扩散屏障结合力

基于A位元素置换策略合成新型MAX相材料Ti_3ZnC_2

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无机材料学报 2019年第1期34卷 60-64页

作者：李勉李友兵罗侃 LU Jun eklund per perSSON per ROSEN Johanna HULTMAN Lars 都时禹黄政仁黄庆中国科学院宁波工业技术与工程研究所核能材料工程实验室(筹) 宁波315201 Department of Physics Chemistry and Biology (IFM) Link?ping University

MAX相材料是一类兼具金属和陶瓷特性的三元层状材料,在高温导电、耐磨、耐腐蚀和耐辐照损伤等方面性能优异。目前已经合成出的MAX相材料已有70余种,但A位元素一直局限在ⅢA和ⅣA主族元素,如Al、Si、Ga等,而以副族元素占据A位的MAX相鲜... 详细信息

MAX相材料是一类兼具金属和陶瓷特性的三元层状材料,在高温导电、耐磨、耐腐蚀和耐辐照损伤等方面性能优异。目前已经合成出的MAX相材料已有70余种,但A位元素一直局限在ⅢA和ⅣA主族元素,如Al、Si、Ga等,而以副族元素占据A位的MAX相鲜有报道。本研究以Ti_3AlC_2为前驱体,利用熔盐中的A位置换反应,制备出了A位为Zn元素的全新MAX相材料Ti_3ZnC_2。结合X射线衍射、扫描电子显微镜和透射电子显微镜等分析手段对Ti_3ZnC_2的成分和结构进行了确认,并通过密度泛函理论对Ti_3ZnC_2的结构稳定性和晶格参数进行了确定。进一步通过热力学计算对Fe、Co、Ni、Cu等几种元素的A位置换反应进行了预测,发现采用这几种元素的氧化物进行置换反应在热力学上也都具有可行性。本研究所提出的元素置换策略是在保持MAX相六方层状晶体结构的基础上,利用Al、Zn在高温下形成共晶产物实现Zn原子向A层内的迁移,而熔盐介质的存在促进了反应动力学。本方法巧妙地避免了MAX相传统合成过程中竞争相的形成,如M-A合金相,因此可以用于探索更多未知的MAX相材料。

关键词： MAX相置换反应 Ti3ZnC2

Electrochemical Lithium Storage performance of Molten Salt Derived V_(2)SnC MAX Phase

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Nano-Micro Letters 2021年第10期13卷 266-275页

作者： Youbing Li Guoliang Ma Hui Shao Peng Xiao Jun Lu Jin Xu Jinrong Hou Ke Chen Xiao Zhang Mian Li per OÅpersson Lars Hultman per eklund Shiyu Du Zhifang Chai Zhengren Huang Na Jin Jiwei Ma Ying Liu Zifeng Lin Qing Huang Engineering Laboratory of Advanced Energy Materials Ningbo Institute of Industrial TechnologyChinese Academy of SciencesNingbo 315201ZhejiangPeople’s Republic of China Qianwan Institute of CNiTECH Ningbo 315336People’s Republic of China College of Materials Science and Engineering Sichuan UniversityChengdu 610065People’s Republic of China CIRIMAT UMR CNRS 5085 UniversitéToulouse III-Paul Sabatier118 route de Narbonne31062 Toulouse Cedex 9France Department of Physics Chemistry and Biology(IFM)Linköping University58183 LinköpingSweden School of Machine Engineering Dongguan University of TechnologyDongguan 523808People’s Republic of China Institute of New Energy for Vehicles School of Materials Science and EngineeringTongji UniversityShanghai 201804People’s Republic of China

MAX phases are gaining attention as precursors of two-dimensional MXenes that are intensively pursued in applications for electrochemical energy ***,we report the preparation of V_(2)SnC MAX phase by the molten salt method.V_(2)SnC is investigated as a lithium storage anode,showing a high gravimetric capacity of 490 mAh g−1 and volumetric capacity of 570 mAh cm^(−3) as well as superior rate performance of 95 mAh g^(−1)(110 mAh cm^(−3))at 50 C,surpassing the ever-reported performance of MAX phase ***-ported by operando X-ray diffraction and density functional theory,a charge storage mechanism with dual redox reaction is proposed with a Sn-Li(de)alloying reaction that occurs at the edge sites of V_(2)SnC particles where Sn atoms are exposed to the electrolyte followed by a redox reaction that occurs at V_(2)C layers with *** study offers promise of using MAX phases with M-site and A-site elements that are redox active as high-rate lithium storage materials.

关键词： MAX phase Molten salt Lithium storage High-rate Energy storage

Al/Mo-C中间层对锆合金表面Zr2Al3C4涂层的界面性能的影响（英文）

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无机材料学报 2020年

作者：叶文浩魏强梁佳敏周洁孟凡平 eklund per 黄庆天津大学材料科学与工程学院中国科学院宁波工业技术与工程研究所河北工业大学机械工程学院 Department of Physics Chemistry and Biology (IFM)， Link?ping University

锆合金表面涂层研究作为提高核燃料包壳事故容错能力的重要技术手段之一，能够有效解决失水事故下锆水反应的问题。Zr2Al3C4由于其优异的抗氧化性能和适用于核环境的化学组分成为锆合金包壳的候选涂层材料之一。由于Zr2Al3C4涂层与锆合... 详细信息

锆合金表面涂层研究作为提高核燃料包壳事故容错能力的重要技术手段之一，能够有效解决失水事故下锆水反应的问题。Zr2Al3C4由于其优异的抗氧化性能和适用于核环境的化学组分成为锆合金包壳的候选涂层材料之一。由于Zr2Al3C4涂层与锆合金基底之间的元素扩散以及热膨胀系数不匹配等问题，在其上制备Zr2Al3C4涂层的相关研究较少。本研究通过磁控溅射结合后续热处理工艺，以Al/Mo-C作为扩散屏障层，在锆合金基底上成功地制备出Zr2Al3C4的涂层。结合X射线衍射、扫描电子显微镜和透射电子显微镜等分析手段，研究了Al/Mo-C中间层对涂层的相和微观结构的影响。结果表明，在800 ℃退火3 h后，未添加中间层的涂层开裂。同时由于Zr-Al-C涂层与基底之间存在明显的元素扩散，导致Zr2Al3C4无法成相。Al/Mo-C中间层作为扩散屏障，能够有效阻止退火过程中Zr-Al-C涂层和基底之间的元素扩散，从而大大降低Zr-Al-C涂层与标准化学量比的偏差，有利于最终涂层中Zr2Al3C4相的形成。此外，该扩散屏障层能够抑制Zr2Al3C4涂层在退火过程中产生裂纹，同时提高退火态涂层与锆合金基底的结合力至30 N以上。

关键词： Zr2Al3C4 中间层扩散屏障结合力

A comparative genomic framework for the fish-tetrapod transition

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Science China(Life Sciences) 2021年第4期64卷 664-666页

作者： per Erik Ahlberg Department of Organismal Biology Uppsala University75236 UppsalaSweden

The evolution of tetrapods(land vertebrates)from lobe-finned fishes,nearly 400 million years ago,was a hugely important *** one thing,if these ancient fishes had not found a way to adapt to life out of the water,we humans would not *** investigate this event we can look at the fossil record,but that only tells us about changes in the skeleton.

关键词： skeleton record fish

Comparative analysis of planted and unplanted controls for assessment of rhizosphere priming effect

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Pedosphere 2022年第6期32卷 884-892页

作者： Jian LI per BENGTSON Department of Biology Microbial Ecology GroupLund UniversitySölvegatan 37Lund 22362(Sweden) Key Laboratory of Urban Environment and Health Institute of Urban EnvironmentChinese Academy of Sciences1799 Jimei RoadXiamen 361021(China)

The rhizosphere priming effect(RPE)is increasingly being considered to be an important regulator of soil organic matter(SOM)decomposition and nutrient turnover,with potential importance for the global CO_(2) *** a result,studies on the RPE have rapidly increased in number over the last few *** of these experiments have been performed using unplanted soil as the control,which could potentially lead to incorrect assessment of the ***,we performed a greenhouse experiment to investigate how the choice of control(i.e.,unplanted control and planted control)influenced the quantification of RPE on SOM decomposition and gross nitrogen(N)mineralization,and to link this to differences in microbial and abiotic soil properties between the two *** the planted control,planted seedlings were cut at soil surface 5 d before measurement of the *** RPE on SOM decomposition was positive in pine soil and almost 2-fold higher when calculated from the planted control than from the unplanted *** spruce soil,a negative RPE on SOM decomposition was found when calculated from the planted control,while the RPE was positive when calculated from the unplanted *** RPE on gross N mineralization was found when calculated from the planted control,while a positive RPE of more than 100%was found when calculated from the unplanted *** microbial biomass and growth rate were lower,while the inorganic N content was higher in the unplanted control than in the planted *** microbial community composition and potential enzyme activity in the planted treatment and planted control were similar,but they differed significantly from those in the unplanted *** results showed that the RPE varied widely depending on the choice of control;thus,we suggest that a planted control,in which the aboveground plant parts are removed only a few days before the measurement of RPE,should be used as the control when elucidating the RPE on belowground C and N

关键词： enzyme activity gross nitrogen mineralization microbial community composition nitrogen availability soil organic matter decomposition

Liver fibrosis in non-alcoholic fatty liver disease-diagnostic challenge with prognostic significance

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World Journal of Gastroenterology 2015年第39期21卷 11077-11087页

作者： per Stal Division of Gastroenterology and Hepatology Karolinska InstitutetDepartment of Digestive DiseasesHuddinge K63Karolinska University Hospital

Non-alcoholic fatty liver disease(NAFLD) is the mostcommon liver disease in the Western world, with a prevalence of 20%. In a subgroup of patients, inflammation, ballooning degeneration of hepatocytes and a varying degree of fibrosis may develop, a condition named non-alcoholic steatohepatitis. Advanced liver fibrosis(stage F3) and cirrhosis(stage F4) are histologic features that most accurately predict increased mortality in both liver-related and cardiovascular diseases. Patients with advanced fibrosis or cirrhosis are at risk for complications such as hepatocellular carcinoma and esophageal varices and should therefore be included in surveillance programs. However, liver disease and fibrosis are often unrecognized in patients with NAFLD, possibly leading to a delayed diagnosis of complications. The early diagnosis of advanced fibrosis in NAFLD is therefore crucial, and it can be accomplished using serum biomarkers(e.g., the NAFLD Fibrosis Score, Fib-4 Index or BARD) or non-invasive imaging techniques(transient elastography or acoustic radiation force impulse imaging). The screening of risk groups, such as patients with obesity and/or type 2 diabetes mellitus, for NAFLD development with these non-invasive methods may detect advanced fibrosis at an early stage. Additionally, patients with a low risk for advanced fibrosis can be identified, and the need for liver biopsies can be minimized. This review focuses on the diagnostic challenge and prognostic impact of advanced liver fibrosis in NAFLD.

关键词： Non-alcoholic fatty liver disease Fibrosis Mortality Biomarkers Elastography

Spinal and supraspinal control of motor function during maximal eccentric muscle contraction:Effects of resistance training

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Journal of Sport and Health Science 2018年第3期7卷 282-293页

作者： per Aagaard Department of Sports Science and Clinical Biomechanics University of Southern Denmark

Neuromuscular activity is suppressed during maximal eccentric(ECC)muscle contraction in untrained subjects owing to attenuated levels of central activation and reduced spinal motor neuron(MN)excitability indicated by reduced electromyography signal amplitude,diminished evoked H-reflex responses,increased autogenic MN inhibition,and decreased excitability in descending corticospinal motor *** ECC muscle force recorded during maximal voluntary contraction can be increased by superimposed electrical muscle stimulation only in untrained individuals and not in trained strength athletes,indicating that the suppression in MN activation is modifiable by resistance *** support of this notion,maximum ECC muscle strength can be increased by use of heavy-load resistance training owing to a removed or diminished suppression in neuromuscular ***(weeks to months)of heavy-load resistance training results in increased H-reflex and V-wave responses during maximal ECC muscle actions along with marked gains in maximal ECC muscle strength,indicating increased excitability of spinal MNs,decreased presynaptic and/or postsynaptic MN inhibition,and elevated descending motor ***,the use of supramaximal ECC resistance training can lead to selectively elevated V-wave responses during maximal ECC contraction,demonstrating that adaptive changes in spinal circuitry function and/or gains in descending motor drive can be achieved during maximal ECC contraction in response to heavy-load resistance training.

关键词： Corticospinal excitability Eccentric muscle contraction H-reflex Neuromuscular plasticity Resistance training V-wave

Factors shaping community structure of endophytic fungi–evidence from the Pinus-Viscum-system

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Fungal Diversity 2013年第3期60卷 55-69页

作者： Derek peršoh Systematische Botanik und Mykologie Ludwigs-Maximilians Universität MünchenMenzinger Straße 6780638 MünchenGermany Abteilung Mykologie Universität BayreuthUniversitätsstraße 30–NW I95440 BayreuthGermany

Endophytic fungal communities have been shown to be highly diverse in almost every host plant species analyzed so ***,the factors shaping their compositions are largely *** elucidate the impact of various factors,10 independent replicates of DNA extracts from each of 17 surface-sterilized leaf and stem samples were analyzed by pyrosequencing of fungal ITS1 rRNA gene ***,154 fungal OTUs(operational taxonomic units),represented by 953,385 sequences,were found in at least 2 samples from Viscum album *** and/or its host Pinus *** from earlier,cultivation-based assessments,the communities were dominated by OTUs related to the genus Mortierella and OTUs not assignable to a certain fungal ***,Ascomycota were still the most diverse group in terms of OTU richness and already hypothesized organ and host preferences of certain endophytic Xylariaceae isolated from the Pinus-Viscum-system could be *** species and organ type were also the major factors shaping the detected fungal *** two plant species clearly differed according to the endophytic fungal communities,but only stems and needles of Pinus were inhabited by significantly different fungal ***,only the 1 and 3 year old stem sections differed according to the endophytic fungal community,while differently aged leaves of both plants were indistinguishable in this *** of the organs had no impact on fungal communities in Pinus,but shorter internodes and smaller leaves showed at least a tendency to differ from the corresponding larger organs in *** communities also differed slightly between the two sampling sites,lying 200 km apart,and between the three sampling *** the samples were drawn within 15 days,this finding indicates that seasonal shifts clearly outweigh aging effects in host plant with perennial *** results therefore provide strong evidence against a linear developm

关键词： Endophytic fungi Pyrosequencing Host preference Stems Leaves Organ age Pinus sylvestris Viscum album Genetic abundance Name assignment