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aBIOTECH 2024年第1期5卷 1-16页

作者： Mengting Xu Ziyue Sun Huanbin Shi jiangnan yue Xiaohui Xiong Zhongling Wu Yanjun Kou Zeng Tao Ministry of Agriculture Key Laboratory of Molecular Biology of Crop Pathogens and Insects Institute of BiotechnologyZhejiang UniversityHangzhou 310058China State Key Lab of Rice Biology and Breeding China National Rice Research InstituteHangzhou 310021China

Di-and tri-methylation of lysine 36 on histone H3(H3K36me2/3)is catalysed by histone methyltransferase Set2,which plays an essential role in transcriptional *** there is a single H3K36 methyltransferase in yeast and higher eukaryotes,two H3K36 methyltransferases,Ash1 and Set2,were present in many filamentous ***,their roles in H3K36 methylation and transcriptional regulation remained *** with methods of RNA-seq and ChIP-seq,we revealed that both Ash1 and Set2 are redundantly required for the full H3K36me2/3 activity in Magnaporthe oryzae,which causes the devastating worldwide rice blast ***1 and Set2 distinguish genomic H3K36me2/3-marked regions and are differentially associated with repressed and activated transcription,***,Ash1-catalysed H3K36me2 was co-localized with H3K27me3 at the chromatin,and Ash1 was required for the enrichment and transcriptional silencing of H3K27me3-occupied *** the different roles of Ash1 and Set2,in H3K36me2/3 enrichment and transcriptional regulation on the stress-responsive genes,they differentially respond to various stresses in ***,we reveal a novel mechanism by which two H3K36 methyltransferases catalyze H3K36me2/3 that differentially associate with transcriptional activities and contribute to enrichment of facultative heterochromatin in eukaryotes.

关键词： Ash1 Facultative heterochromatin H3K36me2/3 Magnaporthe oryzae Set2 Transcriptional regulation

Polycomb Repressive Complex 2-Mediated H3K27 Trimethylation Is Required for Pathogenicity in Magnaporthe oryzae

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Rice science 2022年第4期29卷 363-374页

作者： WU Zhongling QIU Jiehua SHI Huanbin LIN Chuyu yue jiangnan LIU Zhiquan XIE Wei Naweed INAQVI KOU Yanjun TAO Zeng Ministry of Agriculture and Rural Affairs Key Laboratory of Molecular Biology of Crop Pathogens and Insects Institute of BiotechnologyZhejiang UniversityHangzhou 310058China State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 311400China Temasek Life Sciences Laboratory and Department of Biological Sciences 1 Research LinkNational University of SingaporeSingapore 117604Singapore

Polycomb repressive complex 2(PRC2)contributes to catalyze the methylation of histone H3 at lysine 27 and plays vital roles in transcriptional silencing and growth development in various *** Magnaporthe oryzae,histone H3K27 is found to associate with altered transcription of in planta induced ***,it is still unknown whether and how H3K27me3 modification is involved in pathogenicity to rice and stress *** this study,we found that core subunits of PRC2,Kmt6-Suz12-Eed,were required for fungal pathogenicity to rice in ***6-Suz12-Eed localized in the nuclei and was necessary for the establishment of H3K27me3 *** ChIP-seq analysis,9.0%of genome regions enriched with H3K27me3 occupancy,which corresponded to 1033 genes in ***,deletion of Kmt6,Suz12 or Eed altered genome-wide transcriptional expression,while the de-repression genes in theΔkmt6 strain were highly associated with H3K27me3 ***,plenty of genes which encode effectors and secreted enzymes,secondary metabolite synthesis genes,and cell wall stress-responsive genes were directly occupied with H3K27me3 modification and de-repression in theΔkmt6 *** results elaborately explained how PRC2 was required for pathogenicity,which is closely related to effector modulated host immunity and host environment adaption.

关键词： rice blast H3K27me3 transcriptional regulation pathogenicity Polycomb repressive complex 2

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H^#-富足半群

山东大学学报（理学版） 2008年第4期43卷 55-57,61页

作者：丁月孔祥智江南大学理学院江苏无锡214122

通常的Green关系,*-Green关系被推广为#-Green关系,并研究了H#-富足半群的半格分解。

关键词： #-Green关系态射自然序半格分解

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X射线底片黑度变化规律

无损检测 1986年第8期 219-219页

作者：余月娥江南造船厂探伤室

X 射线探伤中底片的质量与胶片的质量、增感力式、曝光规范及暗室处理等项有关。若欲获得符合射线透照标准的底片,则须控制焦距以满足几何不清晰度的要求,在保证穿透力的前提下,采用低的管电压和足够的曝光量,以满足底片衬度和黑度的要求.

关键词：黑度焦距焊缝区曝光时间管电压底片

Precipitation behavior and properties of extruded 7136 aluminum alloy under different aging treatments

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Chinese Journal of Aeronautics 2021年第2期34卷 612-619页

作者： Huiyan LI Lina JIA jiangnan HUANG yue MA School of Materials Science and Engineering Beihang UniversityBeijing 100083China

In this work, the mechanical properties and electrical conductivity of the extruded 7136 aluminum alloy treated by single-stage aging treatment(T6), retrogression and re-aging treatment(RRA), and multiple retrogression and re-aging treatment have been investigated by means of hardness measurements, electrical conductivity tests and tensile tests. The results have shown that the properties of the 7136 alloy such as hardness, tensile strength and electrical conductivity were sensitive to retrogression time(within 90 min). With prolonging the retrogression time, the tensile strength was enhanced first and then decreased, yet the electrical conductivity was continuously increased. The 60 min-treated alloy performed the highest tensile strength(716 MPa), whereas the 90 min-treated alloy possessed the highest electrical conductivity(33.95%IACS). Compared with the T6-treated alloy, the tensile strength and electrical conductivity were improved by 3.3%and 18.9%, respectively. The electrical conductivity showed an obvious increase with repetitious times of the RRA treatment. After 3 RRA60 treatment, a good combination of tensile strength(705 MPa) and electrical conductivity(33.20%IACS) can be obtained. Compared with the T6 condition, the tensile strength and electrical conductivity were improved by 1.7% and 16.3%, respectively. The mechanism of microstructure evolution under different aging treatments has been discussed in detail.

关键词： 7136 aluminum alloy Electrical conductivity Mechanical properties Microstructure Retrogression and re-aging

n-InP/p-InP/p-InGaAs场助光电阴极理论建模与仿真

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真空科学与技术学报 2023年第6期43卷 547-553页

作者：岳江楠李禹晴陈鑫龙徐鹏霄邓文娟彭新村邹继军东华理工大学核技术应用教育部工程研究中心南昌330013 中国电子科技集团公司第五十五研究所南京210000

场助光电阴极与通常的负电子亲和势光阴极相比,能显著延长长波阈值,因此在近红外光探测中有着广阔的应用前景。本文利用二维连续性方程建立了n-InP/p-InP/p-InGaAs场助光阴极的电子发射模型。通过模型模拟得到了电子发射电流,并计算了... 详细信息

场助光电阴极与通常的负电子亲和势光阴极相比,能显著延长长波阈值,因此在近红外光探测中有着广阔的应用前景。本文利用二维连续性方程建立了n-InP/p-InP/p-InGaAs场助光阴极的电子发射模型。通过模型模拟得到了电子发射电流,并计算了外量子效率。分析了不同偏压下外延层的掺杂浓度和厚度对量子效率的影响,根据仿真结果及制备条件限制,确定了阴极外延结构的最佳参数:n-InP接触层的掺杂浓度为1×10^(19)/cm^(3),厚度为0.2μm;p-InP发射层的掺杂浓度为2.2×10^(18)/cm^(3),厚度为25 nm;p-InGaAs吸收层的掺杂浓度为5×1017/cm,,厚度为3μm。对电极和发射面的宽度进行了模拟,发射单元表面的宽度最佳范围为5~8μm,并分析了不同偏压下电极宽度和发射面宽度对量子效率的影响。为场助光电阴极的结构设计和应用提供了理论基础,有利于场助光电阴极的制备。n-InP/p-InP/p-InGaAs场助光电阴极有效提高了发射电流效率,室温5 V偏压下外量子效率在1.55μm处最大值为17.2%。

关键词：光电阴极量子效率场助 InGaAs

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非球面磷酸盐玻璃镜片精密热压仿真与实验

长沙理工大学学报（自然科学版） 2022年第4期19卷 19-31页

作者：唐昆乐江南胡永乐毛聪罗红余剑武成钢长沙理工大学机械装备高性能智能制造关键技术湖南省重点实验室湖南长沙410114 湖南大学机械与运载工程学院湖南长沙410082 江麓机电集团有限公司工艺研究院湖南湘潭411100

【目的】将精密热压成型的仿真与实验相结合,探究非球面磷酸盐玻璃镜片的热压工艺参数对镜片残余应力、成型质量及光学性能的影响,以满足其高精度批量制造的需求。【方法】首先,在玻璃材料热黏弹性、结构松弛特性及热传递分析的基础上,... 详细信息

【目的】将精密热压成型的仿真与实验相结合,探究非球面磷酸盐玻璃镜片的热压工艺参数对镜片残余应力、成型质量及光学性能的影响,以满足其高精度批量制造的需求。【方法】首先,在玻璃材料热黏弹性、结构松弛特性及热传递分析的基础上,获得磷酸盐玻璃热力学性能的相关参数值;接着,建立镜片热压成型的有限元模型,分析热压温度、加压载荷、退火速率等工艺参数对成型镜片残余应力及其分布的影响;最后,开展非球面磷酸盐玻璃镜片的精密热压成型实验,探讨上述工艺参数对镜片成型质量(轮廓偏移量、形状精度及表面粗糙度)与镜片中心区域光学性能(折射率、反射率、透过率)的影响规律,并获得优化的成型工艺参数。【结果】提高热压温度,减小加压载荷及降低退火速率均有利于降低镜片的残余应力,最佳热压温度为560℃,最佳加压载荷为1.1 MPa,最佳退火速率为0.125℃/s;在优化的工艺参数下,两种非球面磷酸盐玻璃镜片的形状精度分别为406.3、829.6 nm,表面粗糙度分别为14.5、15.4 nm,最大轮廓偏移量分别为38.2、75.2 nm,且在400~900 nm检测波长内,透过率均大于86%。【结论】采用仿真分析与实验分析相结合的方法,能较好地探究相应工艺参数对成型规律的影响并起到优化加工条件的作用,优化参数下的成型镜片能满足镜片精度和光学性能的要求。

关键词：非球面磷酸盐热压成型有限元仿真成型质量

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场助光电阴极研究进展

光电子技术 2022年第4期42卷 248-253,266页

作者：岳江楠李禹晴陈鑫龙徐鹏霄邓文娟彭新村邹继军东华理工大学核技术应用教育部工程研究中心南昌330013 中国电子科技集团公司第五十五研究所南京210016

对场助光电阴极的发展进行回顾,介绍了场助光电阴极的工作原理,系统总结了三种具有代表性的阴极结构,分别是InP/InGaAsP/InP、InP/InGaAs、InGaAs/InAsP/InP光电阴极。InP/InGaAsP/InP双异质结结构是场助光电阴极研究的热点,这种结构大... 详细信息

对场助光电阴极的发展进行回顾,介绍了场助光电阴极的工作原理,系统总结了三种具有代表性的阴极结构,分别是InP/InGaAsP/InP、InP/InGaAs、InGaAs/InAsP/InP光电阴极。InP/InGaAsP/InP双异质结结构是场助光电阴极研究的热点,这种结构大多用于长波阈值达到1.3μm的场助光电阴极;InGaAs异质结结构相对于其他结构具有很高的灵敏度,响应时间快,有利于在条纹变像管中应用;InGaAs/InAsP/InP结构的光电阴极在InP和InGaAs之间提供一层InAsP渐变层,对延长波长阈值非常有利,通过分析不同结构的特点及应用,讨论了场助光电阴极的发展方向以及难点。

关键词：场助光电阴极转移电子光电阴极铟镓砷磷化铟

Cascade adsorptive separation of light hydrocarbons by commercial zeolites

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Journal of Energy Chemistry 2022年第9期31卷 299-305,I0009页

作者： Shanshan Liu Yinlin Chen Bin yue Yuanxin Nie Yuchao Chai Guangjun Wu jiangnan Li Xue Han Sarah JDay Stephen PThompson Naijia Guan Sihai Yang Landong Li School of Materials Science and Engineering Nankai UniversityTianjin 300350China Department of Chemistry The University of ManchesterManchester M139PLUnited Kingdom Diamond Light Source Harwell Science CampusOxfordshire OX110DEUnited Kingdom Haihe Laboratory of Sustainable Chemical Transformations Tianjin 300192China

Adsorptive separation of light hydrocarbons by porous solids provides an energy-efficient alternative to state-of-the-art cryogenic ***,an optimal balance between the cost,performance and stability of the sorbent material is yet to be achieved for industrial ***,we report the efficient separation of C2 and C3 hydrocarbons by a faujasite zeolite(Na-X,Si/Al=1.23).A tandem configuration of two fixed-beds packed with Na-X affords complete dynamic separation of the ternary mixture of C_(2)H_(2)/C_(2)H_(4)/C_(2)H_(6)(1/49.5/49.5;v/v/v)under ambient ***-swing desorption on the latter fixed-bed gives ethylene(>99.50%,1.80 mmol g^(-1))and ethane(>99.99%,1.41 mmol g^(-1)).In situ synchrotron X-ray powder diffraction revealed the binding sites for C_(2)H_(2)and C_(2)H_(4)in *** study highlights the potential application of commercial zeolites for challenging industrial separations.

关键词： Zeolites C2 hydrocarbons Ethylene Adsorptive separation

A dual-functional poly(vinyl alcohol)/poly(lithium acrylate)composite nanofiber separator for ionic shielding of polysulfides enables high-rate and ultra-stable Li-S batteries

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Nano Research 2021年第5期14卷 1541-1550页

作者： Chunyang Zhou Jing Wang Xiaobo Zhu Kai Chen yue Ouyang yue Wu yue-E Miao Tianxi Liu State Key Laboratory for Modification of Chemical Fibers and Polymer Materials College of Materials Science and EngineeringInnovation Center for Textile Science and TechnologyDonghua University2999 North Renmin RoadShanghai201620China Key Laboratory of Synthetic and Biological Colloids Ministry of EducationSchool of Chemical and Material EngineeringJiangnan UniversityWuxi214122China Research Center for Analysis and Measurement Donghua UniversityShanghai201620China Bristol Composites Institute(ACCIS) Department of Aerospace EngineeringQueen’s BuildingUniversity of BristolUniversity WalkBristolBS81TRUK

Despite the high theoretical specific capacity,the main challenges of rechargeable lithium-sulfur(Li-S)batteries,including the unceasing shuttle of soluble lithium polysulfides(LiPSs)and severe Li corrosion,seriously hinder their commercial and practical ***,a bifunctional polyvinyl alcohol/poly(lithium acrylate)(C-PVA/PAA-Li)composite nanofiber separator is developed to address the main challenges in Li-S batteries by simultaneously allowing rapid lithium ion transport and ionic shielding of *** C-PVA/PAA-Li composite nanofiber membrane is prepared via the facile electrospinning strategy,followed by thermal crosslinking and in-situ lithiation *** from the conventional Celgard-based coating methods accompanied by impaired lithium ion transport efficiency,the C-PVA/PAA-Li composite nanofiber membrane possesses well-developed porous structures and high ionic conductivity,thus synergistically reducing the charge transfer resistance and inhibiting the growth of lithium *** resulting Li-S batteries exhibit an ultra-low fading rate of 0.08%per cycle after 400 cycles at 0.2 C,and a capacity of 633 mAhg−1 at a high current density of 3 *** study presents an inspiring and promising strategy to fabricate emerging dual-functional separators,which paves the pathway for the practical implementation of ultra-stable and reliable Li-S battery systems.

关键词： nanofiber separator electrospinning ionic shielding dendrite-free lithium-sulfur battery