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Potassium transporter OsHAK9 regulates seed germination under salt stress by preventing gibberellin degradation through mediating OsGA2ox7 in rice

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Journal of Integrative Plant Biology 2024年第4期66卷 731-748页

作者： Peng Zeng Ting Xie jiaxin shen Taokai Liang Lu Yin Kexin Liu Ying He Mingming Chen Haijuan Tang Sunlu Chen Sergey Shabala Hongsheng Zhang Jinping Cheng National Key Laboratory of Crop Genetics&Germplasm Enhancement and Utilization Jiangsu Collaborative Innovation Center for Modern Crop ProductionHainan Yazhou Bay Seed LabJiangsu Province Engineering Research Center of Seed Industry Science and TechnologyNanjing Agricultural UniversityNanjing 210095China International Research Center for Environmental Membrane Biology Foshan UniversityFoshan 528000China School of Biological Sciences University of Western AustraliaCrawley WA 6009Australia

Soil salinity has a major impact on rice seed germination,severely limiting rice ***,a rice germination defective mutant under salt stress(gdss)was identified by using chemical *** GDSS gene was detected via MutMap and shown to encode potassium transporter *** analysis of complementation and mutant lines demonstrated that OsHAK9 was an essential regulator responsible for seed germination under salt ***9 is highly expressed in germinating seed *** contents and non-invasive micro-test technology results showed that OsHAK9 restricted K^(+)efflux in salt-exposed germinating seeds for the balance of K^(+)/Na^(+).Disruption of OsHAK9 significantly reduced gibberellin 4(GA4)levels,and the germination defective phenotype of oshak9a was partly rescued by exogenous GA_(3)treatment under salt *** sequencing(RNA-seq)and real-time quantitative polymerase chain reaction analysis demonstrated that the disruption of OsHAK9 improved the GA-deactivated gene OsGA2ox7 expression in germinating seeds under salt stress,and the expression of OsGA2ox7 was significantly inhibited by salt *** mutants of OsGA2ox7 created using clustered,regularly interspaced,short palindromic repeat(CRISPR)/CRISPR-associated nuclease 9 approach displayed a dramatically increased seed germination ability under salt ***,our results highlight that OsHAK9 regulates seed germination performance under salt stress involving preventing GA degradation by mediating OsGA2ox7,which provides a novel clue about the relationship between GA and OsHAKs in rice.

关键词： GDSS gibberellins potassium transporter rice salt tolerance seed germination

A highly linear stretchable MXene-based biocompatible hydrogel-elastomer hybrid with tissue-level softness

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Science China Materials 2024年第10期67卷 3368-3378页

作者： Shu Wan Haizhou Huang Zisheng He Yizhou Ye shen Li Shi Su jiaxin shen Longxiang Han Peng Wan Xu Ran Li Chen Xuefeng He Litao Sun Hengchang Bi Key Laboratory of Optoelectronic Technology and Systems Ministry of EducationKey Disciplines Laboratory of Novel Micro-Nano Devices and System TechnologySchool of Optoelectronics EngineeringChongqing UniversityChongqing 400044China College of Photonic and Electronic Engineering Fujian Normal UniversityFuzhou 350117China School of Aeronautical Engineering Nanjing Vocational University of Industry TechnologyNanjing 210023China SEU-FEI Nano-Pico Center Key Laboratory of MEMS of Ministry of EducationCollaborative Innovation Center for Micro/Nano FabricationDevice and SystemSoutheast UniversityNanjing 210096China The Shanghai Key Laboratory of Multidimensional Information Processing School of Communication and Electronic EngineeringEast China Normal UniversityShanghai 200241China

Maintaining low modulus while endowing the wide-range linear stretchability to wearable or implantable devices is crucial for these devices to reduce the mechanical mismatch between the devices and human skin/tissue ***,improving linear stretchability often results in an increased modulus of stretchable electronic materials,which hinders their conformability in long-term quantifiable monitoring of ***,we develop a hybrid structure involving interlocking low-modulus porous elastomers(Ecoflex-0030)and MXene-based hydrogels with crosslinking networks of polyvinyl alcohol,sodium alginate,and *** hydrogel–elastomer structure exhibits superior performance compared with previous reports,with a wide linear stretchability strain range from 0 to 1000%and maintaining a low modulus of 6.4 ***,the hydrogel–elastomer hybrids can be utilized as highly sensitive strain sensors with remarkable characteristics,including high sensitivity(gauge factor~3.52),a linear correlation between the resistance and strain(0–200%),rapid response(0.18 s)and recovery times(0.21 s),and excellent electrical reproducibility(1000 loading–unloading cycles).Those electrical and mechanical properties allow the sensor to act as a suitable quantifiable equipment in organ monitoring,human activities detecting,and human–machine interactions.

关键词： linear stretchability low modulus MXene hydrogel-elastomer hybrid

Flag-transitive 2-(v,5,λ)designs with sporadic socle

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Frontiers of Mathematics in China 2020年第6期15卷 1201-1210页

作者： jiaxin shen shenglin ZHOU School of Mathematics South China University of TechnologyGuangzhou 510640China

We state that the flag-transitive automorphism group of a 2-(v,5,λ)design D is primitive of affine type or almost simple type.W e also find that there are up to isomorphism 202-(v,5,λ)designs admitting flag-transiti... 详细信息

关键词： 2-design primitivity flag-transitivity sporadic simple group

Y沸石中Cu(Ⅰ)的可控构筑及其乙烯/乙烷吸附分离性能研究

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化工学报 2024年第4期75卷 1607-1615页

作者：张凯博沈佳新李玉霞谈朋刘晓勤孙林兵南京工业大学化工学院材料化学工程国家重点实验室江苏南京 211816

乙烯(C2H4)和乙烷(C2H6)物理性质相似,其高效分离具有挑战性.利用Cu(Ⅰ)活性位与C2H4间的π络合作用,Cu(Ⅰ)基吸附剂能在温和条件下选择性地分离C2H4和C2H6,显著降低传统低温精馏分离过程的能耗.Cu(Ⅰ)由Cu(Ⅱ)还原制得,但Cu(Ⅱ)还原的... 详细信息

乙烯(C2H4)和乙烷(C2H6)物理性质相似,其高效分离具有挑战性.利用Cu(Ⅰ)活性位与C2H4间的π络合作用,Cu(Ⅰ)基吸附剂能在温和条件下选择性地分离C2H4和C2H6,显著降低传统低温精馏分离过程的能耗.Cu(Ⅰ)由Cu(Ⅱ)还原制得,但Cu(Ⅱ)还原的不可控、能耗高且Cu(Ⅰ)收率低一直是Cu(Ⅰ)基吸附剂应用的障碍.采用选择性还原策略(SRS)成功在Y型沸石中选择性地构筑了Cu(Ⅰ)活性位,实现了温和条件下C2H4/C2H6的吸附分离.利用甲醛(HCHO)蒸气扩散传递,与沸石中的Cu(Ⅱ)反应,实现了低温(140℃)下Cu(Ⅰ)的选择性构筑;制得的Cu(Ⅰ)Y具有优异的C2H4/C2H6吸附分离性能,Cu(Ⅰ)Y的选择性达16.3,远高于Cu(Ⅱ)Y的3.2.机理研究表明,HCHO与Y沸石中的Cu(Ⅱ)发生氧化还原反应,在得到Cu(Ⅰ)的同时生成CO2和H2O.

关键词：吸附乙烯/乙烷分离选择性一价铜选择性还原策略沸石

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禾本科植物EMS诱变研究进展

植物遗传资源学报 2024年第9期25卷 1417-1427页

作者：彭辉穆麟沈佳欣张文杰黄菁黄雨珣张志飞湖南农业大学农学院湖南省草地研究中心湖南省国有林和种苗工作站

EMS是化学诱变中最常用的诱变剂，EMS诱变具有单个碱基点突变率高、成本低、易操作等优点，通过EMS诱变获得突变体可以为育种和基因功能研究提供有利的材料。EMS诱变技术的关键是确定EMS浓度和诱变时间，一般以达到半致死率的浓度和时... 详细信息

EMS是化学诱变中最常用的诱变剂，EMS诱变具有单个碱基点突变率高、成本低、易操作等优点，通过EMS诱变获得突变体可以为育种和基因功能研究提供有利的材料。EMS诱变技术的关键是确定EMS浓度和诱变时间，一般以达到半致死率的浓度和时间为最佳处理组合。禾本科植物中主要以种子为诱变材料，同时花粉、愈伤组织以及依靠营养繁殖的禾本科植物的营养器官也可以作为诱变材料。不同植物材料对EMS的耐受性不同，花粉最敏感，其次是愈伤组织，无性繁殖材料和种子的耐受性较强。突变体的筛选方式包括表型对比筛选、逆境定向筛选和正、反向遗传学筛选。本文综述了近年来EMS诱变技术在禾本科植物育种和基因功能研究中的应用，介绍了EMS的诱变原理、诱变剂浓度、处理时间、诱变处理材料的选择及突变体的筛选，并对未来禾本科植物中的EMS诱变研究进行了展望，为今后禾本科植物的EMS诱变研究提供参考。

关键词：禾本科 EMS 诱变突变体

Modulating the photoelectrons of g-C3N4 via coupling MgTi2O5 as appropriate platform for visible-light-driven photocatalytic solar energy conversion

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Nano Research 2019年第8期12卷 1931-1936页

作者： jiaxin shen Yanzhen Li Haoying Zhao Kai Pan Xue Li Yang Qu Guofeng Wang Dingsheng Wang Key Laboratory of Functional Inorganic Material Chemistry Ministry of EducationSchool of Chemistry and Materials ScienceHeilongjiang UniversityHarbin 150080China Department of Chemistry Tsinghua UniversityBeijing 100084China

Graphitic carbon nitride (g-C3N4) has become an attractive visible-light-responsive photocatalyst because of its semiconductor polymer compositions and easy-modulated band structure. However, the bulk g-C3N4 photocatalyst has the low separation efficiency of photogenerated carriers and unsatisfied surface catalytic performance, which leads to poor photocatalytic performance. As for this, MgTi2O5 with high chemical stability, wide band gap and negative conduction band was used as a suitable platform for coupling with g-C3N4 to enhance charge separation and promoted the photoactivity. Different from common approaches, here, we propose an innovative method to construct g-C3N4/MgTi2O5 nanocomposites featuring “0 + 1 >1" magnification effect to improve g-C3N4 photocatalytic performance under visible light irradiation. Additionally, compositing metal oxides of MgTi2O5 with g-C3N4 has proven to be a proper strategy to accelerate surface catalytic reactions in g-C3N4, and the photoinduced carriers were modulated to maintain thermodynamic equilibrium, which convincingly promotes the photocatalytic activity. The photocatalytic performance of the nanocomposites was measured by hydrogen production and CO2 reduction under visible light. The developed g-C3N4/MgTi2O5 nanocomposites with a 5 wt.% MgTi2O5 exhibits the highest H2 and CO yield under visible light and excellent stability compare to the other MgTi2O5 contents in composites. According to surface photo-voltage spectra, electrochemical CO2 reduction, photoluminescence, etc. The superior performance can be related to an enhanced electron lifetime, the promoted charge transfer and the increased electronic separation property of g-C3N4. Our work provides an approach to overcome the defect of pure g-C3N4, which accesses to composite with the second component matched well.

关键词： g-C3N4/MgTi2O5 visible-light photocatalytic hydrogen production CO2 reduction

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基于有限元法的U型钢卡缆受力分析研究

煤炭技术 2024年第7期43卷 205-209页

作者：申佳鑫李宗泽郭晓阳郭朋煜河南大有能源股份有限公司常村煤矿河南三门峡472300 重庆大学煤矿灾害动力学与控制国家重点实验室重庆400044 同济大学土木工程学院上海200092

随着煤矿开采深度增大,支护难度也成倍提升。U型钢可缩性支架被广泛地应用于深部矿山巷道支护。卡缆是U型钢可缩性支架的关键部件,其性能直接影响着U型钢支架的支护承载性能。在理论分析U型钢拱形支架在不同受载情况下的变形特点的基础... 详细信息

随着煤矿开采深度增大,支护难度也成倍提升。U型钢可缩性支架被广泛地应用于深部矿山巷道支护。卡缆是U型钢可缩性支架的关键部件,其性能直接影响着U型钢支架的支护承载性能。在理论分析U型钢拱形支架在不同受载情况下的变形特点的基础上,借助ABAQUS有限元数值计算软件,分别研究了双槽夹板卡缆在圆弧形和椭圆弧形2种型钢搭接段滑移时的力学特性,并且分析了U型钢螺栓的受力特征,得到了双槽夹板卡缆对U型钢拱形支架的约束作用会受到搭接段曲率不匹配度的影响的结论,提出了控制U型钢失效的建议。对于确保地下工程U型钢支架的稳定支护具有重要意义。

关键词： U型钢支架卡缆深部支护有限元法分析

Electro-spraying/spinning: A novel battery manufacturing technology

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Green Energy & Environment 2024年第1期9卷 81-88页

作者： Zhuan Hu jiaxin Hao Dongyang shen Caitian Gao Zhaomeng Liu Jianguo Zhao Bingan Lu School of Physics and Electronics Hunan UniversityChangsha410082China State Key Laboratory of Advanced Design and Manufacturing for Vehicle Body Hunan Provincial Key Laboratory of Multi-electron Based Energy Storage DevicesHunan UniversityChangsha410082China School of Physics and Electronic Information Luoyang Normal UniversityLuoyang471934China Section of Environmental Protection Key Laboratory of Eco-Industry School of MetallurgyNortheastern UniversityShenyangLiaoning110819China

Lithium-ion battery(LIB) industry seems to have met its bottle neck in cutting down producing costs even though much efforts have been put into building a complete industrial chain. Actually, manufacturing methods can greatly affect the cost of battery production. Up to now, lithium ion battery producers still adopt manufacturing methods with cumbersome sub-components preparing processes and costly assembling procedures, which will undoubtedly elevate the producing cost. Herein, we propose a novel approach to directly assemble battery components(cathode, anode and separator) in an integrated way using electro-spraying and electro-spinning technologies. More importantly, this novel battery manufacturing method can produce LIBs in large scale, and the products show excellent mechanical strength, flexibility, thermal stability and electrolyte wettability. Additionally, the performance of the as-prepaed Li Fe PO_(4)||graphite full cell produced by this new method is comparable or even better than that produced by conventional manufacturing approach. In brief, this work provides a new promising technology to prepare LIBs with low cost and better performance.

关键词： Electro-spraying Electro-spinning Integrated electrode Lithium-ion battery

A generalized nonlinear three-dimensional Hoek‒Brown failure criterion

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Journal of Rock Mechanics and Geotechnical Engineering 2024年第8期16卷 3149-3164页

作者： jiaxin Wang Shunchuan Wu Haiyong Cheng Junlong Sun Xiaolong Wang Yaxi shen Faculty of Land Resource Engineering Kunming University of Science and TechnologyKunming650093China Key Laboratory of Geohazard Forecast and Geoecological Restoration in Plateau Mountainous Area Ministry of Natural ResourcesKunming650093China Yunnan Key Laboratory of Geohazard Forecast and Geoecological Restoration in Plateau Mountainous Area Kunming650093China

To understand the strengths of rocks under complex stress states,a generalized nonlinear threedimensional(3D)Hoek‒Brown failure(NGHB)criterion was proposed in this *** criterion shares the same parameters with the generalized HB(GHB)criterion and inherits the parameter advantages of *** new parameters,b,and n,were introduced into the NGHB criterion that primarily controls the deviatoric plane shape of the NGHB criterion under triaxial tension and compression,*** NGHB criterion can consider the influence of intermediate principal stress(IPS),where the deviatoric plane shape satisfies the smoothness requirements,while the HB criterion *** criterion can degenerate into the two modified 3D HB criteria,the Priest criterion under triaxial compression condition and the HB criterion under triaxial compression and tension *** criterion was verified using true triaxial test data for different parameters,six types of rocks,and two kinds of in situ rock *** comparison,three existing 3D HB criteria were selected for performance comparison *** result showed that the NGHB criterion gave better prediction performance than other *** prediction errors of the strength of six types of rocks and two kinds of in situ rock masses were in the range of 2.0724%-3.5091%and 1.0144%-3.2321%,*** proposed criterion lays a preliminary theoretical foundation for prediction of engineering rock mass strength under complex in situ stress conditions.

关键词： Rock mechanics HoekeBrown criterion Failure criterion Intermediate principal stress True triaxial test Smoothness and convexity