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Mn Diffusion at Early Stage of Intercritical Annealing of 5Mn Steel

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Journal of Iron and Steel Research International 2015年第11期22卷 1015-1019页

作者： Xi-nan LUO Xiao-yan ZHONG Hai-wen LUO hui-{2. ZHOU Cun-yu WANG jie shi Beijing National Center for Electron Microscopy Laboratory of Advanced Materials (MOE) The State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University School of Metallurgical and Ecological engineering University of Science and Technology Beijing Central Iron and Steel Research institute

Mn distribution and austenite morphology at the early stage of intercritical annealing of 5Mn steel were investigated. It was experimentally demonstrated that a newly formed 2. nm-thick austenite was formed without the partitioning of Mn. The elemental analysis confirmed that the growth of austenite should be controlled by the diffusion of C prior to the diffusion of Mn at a low heating rate. The austenite growth started under negligible-partitioning local equilibrium mode and then switched to partitioning local equilibrium mode. Mn segregation at the γ/α interface suggested that the collector plate mechanism was the essential way of Mn partitioning at the early stage of austenite growth.

关键词： Mn diffusion austenite nucleation intercritical annealing negligible-partitioning local equilibrium diffusion mechanism

Matrix Effect on Polydiarylfluorenes Electrospun Hybrid Microfibers: From Morphology Tuning to High Explosive Detection Efficiency

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Chinese Journal of Polymer Science 2023年第7期41卷 1011-1017页

作者： Wei Xue Man Xu Chuan-Xin Wei hua-Min Sun Li-Li Sun Sh{2.g-jie Wang Jin-Yi Lin Nai-{2. shi Ling-Hai Xie Wei huang State Key Laboratory of Organic Electronics and Information Displays&institute of Advanced Materials(IAM) Nanjing University of Posts&TelecommunicationsNanjing210023China Center for Supramolecular Optoelectronics(CSO) Key Laboratory of Flexible Electronics(KLOFE)and Institute of Advanced Materials(IAM)Nanjing Tech University(NanjingTech)Nanjing211816China Frontiers Science Center for Flexible Electronics(FSCFE) Shaanxi Institute of Flexible Electronics(SIFE)&Shaanxi Institute of Biomedical Materials and Engineering(SIBME)Northwestern Polytechnical University(NPU)Xi’an710072China

Precisely optimizing the morphology of functional hybrid polymeric systems is crucial to improve its photophysical property and further extend their optoelectronic applications. The physic-chemical property of polymeric matrix in electrospinning (ES) processing is a key factor to dominate the condensed structure of these hybrid microstructures and further improve its functionality. Herein, we set a flexible poly(ethylene oxide) (PEO) as the matrix to obtain a series of polydiarylfluorenes (including PHDPF, PODPF and PNDPF) electrospun hybrid microfibers with a robust deep-blue emission. Significantly different from the rough morphology of their poly(N-vinylcarbazole) (PVK) ES hybrid fibers, polydiarylfluorenes/PEO ES fibers showed a smooth morphology and small size with a diameter of 1∼2.µm. Besides, there is a relatively weak phase separation under rapid solvent evaporation during the ES processing, associated with the hydrogen-bonded-assisted network of PEO in ES fibers. These relative “homogeneous” ES fibers present efficient deep-blue emission (PLQY>50%), due to weak interchain aggregation. More interestingly, low fraction of planar (β) conformation appears in the uniform PODPF/PEO ES fibers, induced by the external traction force in ES processing. Meanwhile, PNDPF/PEO ES fibers present a highest sensitivity than those of other ES fibers, associated with the smallest diameter and large surface area. Finally, compared to PODPF/PVK fibers and PODPF/PEO amorphous ES fibers, PODPF/PEO ES fibers obtained from DCE solution exhibit an excellent quenching behavior toward a saturated DNT vapor, mainly due to the synergistic effect of small size, weak separation, β-conformation formation and high deep-blue emission efficiency.

关键词： Matrix effect Electrospun fibers Polydiarylfluorenes Planar conformation Explosive detection

Identification of salinity-related genes in enO2.mutant (eno2.–) of Arabidopsis thaliana

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Journal of Integrative Agriculture 2018年第1期17卷 94-110页

作者： ZHANG Yong-hua CHen Chao {2. Zi-han CHenG hui-mei BING jie MA Xiao-feng ZHenGChao-xing LI Hong-jie ZHANG Gen-fa Beijing Key Laboratory of Gene Resource and Molecular Development/College of Life Sciences Beijing Normal University Beijing 100875 P.R.China Beijing Normal university Zhuhai 519087 P.R.China National Key Facility for Crop Gene Resources and Genetic Improvement/institute of Crop Sciences Chinese Academy of Agricultural Sciences Beijing 100081 P.R. China

Abiotic stress poses a great threat to plant growth and can lead to huge losses in yield. Gene enolase2.（en02. is important in resistance to abiotic stress in various organisms. enO2.T-DNA insertion mutant （enoZ） plants of Arabidopsis thaliana showed complete susceptibility to sodium chloride treatment when were analyzed either as whole plants or by measuring root growth during NaCl treatment. Quantitative real-time RT-PCR （RT-qPCR） was performed to investigate the expression profile of en02.in response to NaCl stress in Arabidopsis. The transcript level of en02.was rapidly elevated in 300 mmol L-1 NaCl treatment. enO2.also responded to 300 mmol L 1 NaCl treatment at the protein level. To illuminate the mechanism underlying en02.resistance to salt at the transcriptional level, we studied the wild-type and enoZ Arabidopsis lines that were treated with 300 mmol L 1 NaCl for 18 h using 454 GS FLX, which resulted in an expressed sequence tag （EST） dataset. A total of 961 up-regulated and 746 down-regulated differentially expressed genes （DEGs） were identified in the pairwise comparison w-r-18 h：eno2.-18 h. The DEGs were identified and functionally annotated using the databases of Gene Ontology （GO） and the Kyoto encyclopedia of genes and genomes （KEGG）. The identified unigenes were subjected to GO analysis to determine biological, molecular, and cellular functions. The biological process was enriched in a total of 2. GO terms, the cellular component was enriched in 13 GO terms, and the molecular function was enriched in 11 GO terms. Using KEGG mapping, DEGs with pathway annotations contributed to 115 pathways. The top 3 pathways based on a statistical analysis were biosynthesis of the secondary metabolites （KO01110）, plant-pathogen interactions （KO0462.）, and plant hormone signal transduction （KO04075）. Based on these results, en02.contributes to increased resistance to abiotic stress. In particular, en02.is involved in some of the metabolic stress response pathways in

关键词： en02 NaCI tolerance abiotic stress 454 GS FLX sequencing GO KEGG

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长输管线气体泄漏率的计算方法研究

石油学报 2004年第1期25卷 101-105页

作者：霍春勇董玉华余大涛高惠临周敬恩冯耀荣西安交通大学材料科学与工程学院陕西西安710049 中国石油天然气集团公司管材研究所陕西西安710065 西安石油大学机械工程系陕西西安710065

应用计算流体力学理论 ,给出了长输管线气体泄漏率新的计算方法。当管线破坏的孔径较小 (属于小孔泄漏 )时 ,采用孔模型计算气体泄漏率 ;当管线发生全截面断裂时 ,利用管线模型计算 ;孔径介于两者之间时则利用新推荐的方法。由计算实例... 详细信息

应用计算流体力学理论 ,给出了长输管线气体泄漏率新的计算方法。当管线破坏的孔径较小 (属于小孔泄漏 )时 ,采用孔模型计算气体泄漏率 ;当管线发生全截面断裂时 ,利用管线模型计算 ;孔径介于两者之间时则利用新推荐的方法。由计算实例可知 ,管内起始压力大于 1 5MPa时 ,临界流阶段泄漏的气体质量占总泄漏质量的 90 %以上 ,可用临界流阶段的平均泄漏率代替总平均泄漏率 ;也可用起始泄漏率的 3 0 %近似代替总平均泄漏率。随管内起始压力的增加 ,这种近似效果更好。利用文中的数学模型可以较好地估算不同孔径的气体泄漏率 ,可为定量评价长输管线失效后对环境的影响提供依据。

关键词：长输管线气体泄漏率临界流动数学模型计算方法

闽江口典型芦苇湿地与短叶茳芏湿地土壤碳氮含量的空间分布特征

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生态学杂志 2018年第4期37卷 1102-1110页

作者：王华孙志高李家兵何涛高会王杰林朋左吴欣桐福建师范大学地理研究所湿润亚热带生态地理过程教育部重点实验室福州350007 福建师范大学环境科学与工程学院福州350007

以闽江河口鳝鱼滩湿地的芦苇湿地、短叶茳芏湿地以及二者交错带湿地为对象,研究了不同类型湿地土壤碳氮含量的空间分布特征。结果表明:土壤总氮(TN)和有机碳(SOC)含量在水平方向上整体表现为交错带湿地>芦苇湿地>短叶茳芏湿地,而在垂直... 详细信息

以闽江河口鳝鱼滩湿地的芦苇湿地、短叶茳芏湿地以及二者交错带湿地为对象,研究了不同类型湿地土壤碳氮含量的空间分布特征。结果表明:土壤总氮(TN)和有机碳(SOC)含量在水平方向上整体表现为交错带湿地>芦苇湿地>短叶茳芏湿地,而在垂直方向上其在不同类型湿地土壤中的含量均随深度增加而降低;与芦苇湿地和短叶茳芏湿地相比,交错带湿地表层土壤的无机氮含量分别降低了15.78%、0.84%(NH4+-N)和13.04%、44.00%(NO3--N),而在下层土壤分别增加了30.00%、6.06%(NH4+-N)和43.75%、2..91%(NO3--N);芦苇湿地土壤NH4+-N含量主要受到有机质含量控制,短叶茳芏湿地土壤TN含量受到土壤盐分的重要影响,而土壤颗粒组成和水分是影响交错带湿地土壤的NH4+-N和NO3--N关键因子。研究发现,芦苇与短叶茳芏种群的竞争作用不但明显增加了交错带湿地土壤SOC和TN含量,而且也深刻改变了NH4+-N和NO3--N含量的空间分布特征,其可能通过改变土壤的细颗粒组成、氮矿化与硝化作用来影响土壤碳氮的空间分布。

关键词：有机碳氮竞争作用湿地闽江河口

Genetic effects of Agropyron cristatum 2. chromosome translocation fragments in a wheat background

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Journal of Integrative Agriculture 2023年第1期22卷 52-62页

作者： XU shi-rui JIANG Bo HAN Hai-ming JI Xia-jie ZHANG Jin-p{2.g ZHOU Sh{2.g-hui YANG Xin-ming LI Xiu-quan LI Li-hui LIU Wei-hua National Key Facility for Crop Gene Resources and Genetic Improvement Institute of Crop SciencesChinese Academy of Agricultural SciencesBeijing 100081P.R.China Triticeae Research institute Sichuan Agricultural UniversityChengdu 611130P.R.China

Agropyron cristatum(2.=4x=2.,PPPP)is a wild relative of common wheat which contains a large number of desirable genes that can be exploited for wheat ***–*** 2. alien translocation lines exhibit many desirable traits,such as small flag leaves,a high spikelet number and density,and a compact plant *** agronomic trait evaluation and a genetic analysis were carried out on translocation lines and backcross populations of these lines carrying different translocation *** results showed that a translocation fragment from 2.T-3(2.L)reduced the length of the flag leaves,while translocation fragments from 2.T-3(2.L)and 2.T-5(2.L(0.60–1.00))reduced the width of the flag leaves.A translocation fragment from 2.T-13(2.S(0.18–0.36))increased the length and area of the flag *** fragments from 2.T-3(2.L)and 2.T-8(2.L(0.86–1.00))increased the density of *** fragments from 2.T-7(2.L(0.00–0.09)),2.T-8(2.L(0.86–1.00)),2.T-10(2.S),and 2.T-13(2.S(0.18–0.36))reduced plant *** study provides a scientific basis for the effective utilization of wheat–*** translocation lines.

关键词： wheat-A.cristatum 2. chromosome translocation lines flag leaf spikelet density genetic effects

Gene expression profiles of adipose tissue of obese rats with central administration of neuropeptide Y-Y5 receptor antisense oligodeoxynucleotides by cDNA microarrays

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Gene expression profiles of adipose tissue of obese rats wit...

Corrosion Behaviour of a Non‑equiatomic CoCrFeniMo High‑entropy Alloy in H_(2.S‑Containing and H_(2.S‑Free environments

中国营养学会第十次全国营养学术会议暨第七届会员代表大会

作者： jie QIU~(2.3) Yu-hui NI~(2.3) Rong-{2. CHen~3 Chen-bo JI~(2.3) Feng LIU~(2.3) Chun-mei ZHANG~(2.3) Chun-lin GAO~(2.3) Xiao-hui CHen~(2.3) Mei-ling TONG~(2.3) Xia CHI~(2.3) Xiao-yu ZHOU~(3,4) Xi-rong GUO~(2.3) 2.Department of Pediatrics,Nanjing Maternity and Child Health Hospital of Nanjing Medical university,Nanjing 2.0004,china 3 institute of Pediatrics of Nanjing Medical university,Nanjing 2.002.,china 4.Department of Newborn Infants,Nanjing Children’s Hospital of Nanjing Medical university,Nanjing 2.0008,china

Aim To investigate the gene expression profiles of adipose tissue of obese rats with central administration of neuropeptide Y-Y5 receptor antisense oligodeoxynucleotides(ODNs)by cDNA microarrays. Methods Y5 receptor antisense,sense,mismatched ODNs or vehicle was intracerebroventricularly injected,cDNA microarrays containing 18000 genes/Ests were used to investigate gene expression of adipose tissue. Results Autoradiographic analysis showed that 404,81,and 34 genes were differently expressed over 2.fold,3-fold,and 5-fold *** clusters of genes associated with apoptosis,signal transduction,energy metabolism,lipid metabolism,et al were concerned. Conclusion Analysis of differentially expressed genes will help to understand the molecular mechanisms of Y5 receptor antisense ODNs therapy.

关键词：

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Acta Metallurgica Sinica(english Letters) 2023年第3期36卷 366-378页

作者： Zhu Wang Guo‑hui Zhang Yong Yao Xue‑hua Fan {2. Jin Lei Zhang Yan‑Xia Du institute for Advanced Materials and Technology University of Science and Technology BeijingBeijing 100083China CITIC Pacific Special Steel Group Co. LtdJiangsu 214429China china Petroleum engineering&Construction Co. Ltd Beijing CompanyBeijing 100085China

The corrosion behaviour of a non-equiatomic CoCrFeniMo high-entropy alloy(HEA)in H_(2.S-containing and H_(2.S-free environments was studied by electrochemical tests,surface characterization,and solution *** results showed that the HEA exhibited primary and secondary passivation in the H_(2.S-free environment,and the transition was owing to the enhanced dissolution of Fe *** with the primary passive film,the Cr/Fe ratio in the secondary passive film increased at the expense of the selective dissolution of ***,the corrosion resistance of HEA decreased with the applied *** was the most stable element in the film of HEA,regardless of H_(2.*** presence of H_(2.S accelerated the dissolution of all the cationic elements in the HEA.H_(2.S promoted the formation of thicker but less protective surface film and induced the loss of passivity.

关键词： High-entropy alloy(HEA) Corrosion H_(2.S Secondary passivation X-ray photoelectron spectroscopy(XPS) Induced coupled plasma(ICP)

Petroleum substitution, greenhouse gas emissions reduction and environmental benefits from the development of natural gas vehicles in china

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Petroleum Science 2018年第3期15卷 644-656页

作者： jie-hui Yuan Sh{2.g Zhou Tian-Duo P{2.g Ge-hua Wang Xun-Min Ou institute of energy Environment and Economy Tsinghua University china Automotive energy Research Centre Tsinghua University

This study develops a bottom-up model to quantitatively assess the comprehensive effects of replacing traditional petroleum-powered vehicles with natural gas vehicles（NGVs） in china based on an investigation of the direct energy consumption and critical air pollutant（CAP） emission intensity, life-cycle energy use and greenhouse gas（GHG） emission intensity of NGV fleets. The results indicate that, on average, there are no net energy savings from replacing a traditional fuel vehicle with an NGV. Interestingly, an NGV results in significant reductions in direct CAP and life-cycle GHG emissions compared to those of a traditional fuel vehicle, ranging from 61% to 76% and 12. to 2.%, respectively. Due to the increasing use of natural gas as a vehicle fuel in china（i.e. approximately 2..2.billion cubic metres of natural gas in2.15）, the total petroleum substituted with natural gas was approximately 2..8 million tonnes（Mt）, which generated a GHG emission reduction of 16.9 Mt of CO2.equivalent and a CAP emission reduction of 1.8 Mt in 2.15. Given the significant contribution of NGVs, growing the NGV population in 2.2. will further increase the petroleum substitution benefits and CAP and GHG emission reduction benefits by approximately 42.5 Mt of petroleum-based fuel, 3.1 Mt of CAPs and 2..0 Mt of GHGs. By 2.30, these benefits will reach 81.5 Mt of traditional petroleum fuel, 5.6 Mt of CAPs and 50.5 Mt of GHGs, respectively.

关键词： Natural gas vehicles energy use Greenhouse gases Critical air pollutants china Life-cycle analysis