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Sdr4 dominates pre-harvest sprouting and facilitates adaptation to local climatic condition in Asian cultivated rice

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Journal of Integrative Plant Biology 2022年第6期64卷 1246-1263页

作者： Bo Zhao Hui zhang Tianxiao Chen Ling Ding Liying zhang Xiali Ding jun zhang qian qian Yong Xiang Shenzhen Branch Guangdong Laboratory for Lingnan Modern AgricultureGenome Analysis Laboratory of the Ministry of AgricultureAgricultural Genomics Institute at ShenzhenChinese Academy of Agricultural SciencesShenzhen 518120China Shanxi Key Laboratory of Minor Crop Germplasm Innovation and Molecular Breeding College of Life SciencesShanxi Agricultural UniversityTaigu 030801China State Key Laboratory of Rice Biology China National Rice Research InstituteHangzhou 310006China

Pre-harvest sprouting(PHS),which reduces grain yield and quality,is controlled by seed dormancy *** few dormancy-related genes have been cloned,the genetic basis of seed dormancy in rice(Oryza sativa L.)remains ***,we performed a genome-wide association study and linkage mapping to dissect the genetic basis of seed dormancy in *** findings suggest that Seed Dormancy4(Sdr4),a central modulator of seed dormancy,integrates the abscisic acid and gibberellic acid signaling pathways at the transcriptional *** analysis revealed that three Sdr4 alleles in rice cultivars already existed in ancestral Oryza rufipogon ***,like the semi-dwarf 1(SD1)and Rc loci,Sdr4 underwent selection during the domestication and improvement of Asian cultivated *** distribution frequency of the Sdr4-n allele in different locations in Asia is negatively associated with local annual temperature and ***,we developed functional molecular markers for Sdr4,SD1,and Rc for use in molecular *** results provide clues about the molecular basis of Sdr4-regulated seed ***,these findings provide guidance for utilizing the favorable alleles of Sdr4 and Rc to synergistically boost PHS resistance,yield,and quality in modern rice varieties.

关键词： climatic adaptation pre-harvest sprouting Rc rice SD1 Sdr4 seed dormancy

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Effect of operating parameters on the performance of thermally regenerative ammonia-based battery for low-temperature waste heat recovery

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Chinese Journal of Chemical Engineering 2021年第4期34卷 335-340页

作者： Yu Shi Liang zhang jun Li qian Fu Xun Zhu qiang Liao Yongsheng zhang Key Laboratory of Low-grade Energy Utilization Technologies and Systems Ministry of EducationChongqing 400030China

This study investigated the important factors that affect the operating parameters of thermally regenerative ammoniabased batteries(TRABs),including the metal electrode type,membrane type,electrode surface area,electrode distance,electrolyte concentration,and ammonia *** experimental results showed that the maximum power density of TRABs with a Cu electrode was 40.0 W·m^(2),which was considerably higher than that with Ni(0.34 W·m^(2))and Co(0.14 W·m^(2))*** with an anion exchange membrane had a 28.6%higher maximum power density than those with a cation exchange *** increased electrode surface resulted in an increased maximum power but a decreased maximum power *** a certain range,TRAB performance was enhanced with decreased electrode distance and increased electrolyte *** increased ammonia concentration resulted in enhanced ammonia transfer and improved the TRAB performance.

关键词： Electrochemistry Thermally regenerative ammonia-based battery Recovery Renewable energy

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Performance of a thermally regenerative ammonia-based battery using gradient-porous copper foam electrodes

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Science China(Technological Sciences) 2021年第4期64卷 696-704页

作者： LU Zhiqiang zhang YongSheng zhang Liang LI jun FU qian ZHU Xun LIAO qiang Key Laboratory of Low-Grade Energy Utilization Technologies and Systems Ministry of EducationChongqing 400030China Institute of Engineering Thermophysics School of Energy and Power EngineeringChongqing UniversityChongqing 400030China

Gradient-porous copper foam electrodes were applied to alleviate the adverse effects of the uneven current distribution of electrodes along the electrolyte flow direction in thermally regenerative ammonia-based batteries(TRABs).The results indicated that gradient-porous copper foam with a decreasing pore size(TRAB-LMS)provided the most uniform current distribution and generated the highest power density(15.5 W/m^(2)),total charge(1800 C)and energy density(1224 W h/m^(3)).With the increase in flow rate,the power density of the TRAB-LMS increased considerably within a certain range and then decreased slightly,with the optimal flowrate at 15 mL/*** the optimal flow rate,the performance of TRAB-LMS increased when the ammonia concentration rose from 0.5 to 2 M(1 M=1 mol L^(-1));however,it decreased slightly when the ammonia concentration further increased to 3 *** slight decrease in the cathode potential suggested that the flow and ammonia concentration beyond the optional values facilitated not only the transfer of ammonia into the porous anode,but also the crossover of ammonia from the anode to the cathode.

关键词： thermally regenerative ammonia-based battery gradient-porous electrode current distribution mass transfer

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Thermoelectric properties of quaternary Mg_2Sn_(0.4)Si_(0.6-x)Ge_x alloys

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International Journal of Minerals,Metallurgy and Materials 2009年第5期16卷 564-567页

作者： Hao Yin Xin-Bing Zhao qian zhang Tie-jun Zhu State Key Laboratory of Silicon Materials Department of Materials Science and Engineering Zhejiang University Hangzhou 310027 China

Quaternary alloys Mg2Sn0.4Si0.6-xGex （x=0, 0.02, 0.05, 0.08 0.1, and 0.2） were prepared using induction melting followed by hot-pressing. Relative densities of the sintered samples were over 97% of the theoretical values. Multiple phases were detected in the samples. It was found that the Seebeck coefficient was sensitive to the content of Mg2Ge and a maximum value of about 350 μV-K^-1 was obtained. The introduction of Ge increases the electrical conductivity and the thermal conductivity simultaneously. The mechanism of this phenomenon was discussed. A maximum dimensionless figure of merit, ZT, of about 0.28 was obtained for Mg2Sn0.4Si0.55Ge0.05 at 550 K.

关键词： thermoelectric materials hot-pressing thermal conductivity induction melting quaternary alloys

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微合金热连轧带钢轧制过程温度变化的数学模型

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特殊钢 2004年第3期25卷 14-16页

作者：余驰斌钱俊张云祥赵刚宋平苏毅谢华武汉科技大学武汉430081 武汉钢铁(集团)公司武汉430080

根据现场实测数据的研究 ,建立了铌微合金化高强度低合金 2 10～ 2 5 0mm厚板坯轧成 3.0～ 8.0mm成品带钢在 3 4连续式轧机组粗轧和精轧时轧件温度计算模型 ,包括辊道、粗轧段、精轧段、层流冷却段轧件温降的计算公式。结果表明 ,模型... 详细信息

根据现场实测数据的研究 ,建立了铌微合金化高强度低合金 2 10～ 2 5 0mm厚板坯轧成 3.0～ 8.0mm成品带钢在 3 4连续式轧机组粗轧和精轧时轧件温度计算模型 ,包括辊道、粗轧段、精轧段、层流冷却段轧件温降的计算公式。结果表明 ,模型预报和实测轧件温度在粗轧出口平均误差小于± 14℃ ,在精轧出口小于± 5℃ ,卷取入口小于± 10℃。

关键词：微合金钢带钢轧制温度控制数学模型热连轧

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Mechanical properties of tungsten heavy alloy and damage behaviors after hypervelocity impact

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Rare Metals 2014年第4期33卷 414-418页

作者： Zhe Wu Yang zhang Chun-Mei Yang qian-jun Liu College of Mechanical and Electrical Engineering Northeast Forestry University College of Science Northeast Forestry University

93W-4.5Ni-l.5Fe-lCo （W） was prepared by powder metallurgic method, and then dynamic mechanical properties of this material were tested at high temperature by means of high-temperature split Hopkinson pressure bar （SHPB）. The results show that the material possesses high- dynamic mechanical properties, significant temperature effects, and strain hardening behaviors. Used two-stage light gas gun, the penetration test of 93W projectile was finished. After the completion of the test, through the microstructure observation of the residual 93W projectiles with the aid of scanning electron microscopy （SEM） and transmission electron microscopy （TEM）, it can be found that there are obvious signs of hot melt existing on the surface of the projectile, a lot of adiabatic shear bands inside the projectile, and microcracks exist at the end of adiabatic shear bands. The test results show that adiabatic shear is the main form to cause the projectile failure and it is the emergence of the adiabatic shearing phenomenon that makes 93W display good self-sharpening property in the process of hypervelocity penetration. At the same time, the results of TEM observation show that there are high- density dislocations at the interface between W and Ni-Fe- Co-based alloy inside the 93W.

关键词： Tungsten heavy alloy Dynamic compression Mechanical properties Adiabatic shear band

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MicroRNA-370-5p inhibits pigmentation and cell proliferation by downregulating mitogen-activated protein kinase kinase kinase 8 expression in sheep melanocytes

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Journal of Integrative Agriculture 2023年第4期22卷 1131-1141页

作者： JI Kai-yuan WEN Ru-jun WANG Zheng-zhou TIAN qian-qian zhang Wei zhang Yun-hai Anhui Province Key Laboratory of Veterinary Pathobiology and Disease Control College of Animal Science and TechnologyAnhui Agricultural UniversityHefei 230036P.R.China Anhui Province Key Laboratory of Local Livestock and Poultry Genetic Resources Conservation and Bio-Breeding College of Animal Science and TechnologyAnhui Agricultural UniversityHefei 230036P.R.China Linquan Comprehensive Experimental Station Anhui Agricultural UniversityLinquan 236400P.R.China

In mammals,microRNAs(miRNAs)play key roles in multiple biological processes by regulating the expression of target *** have found that the levels of miR-370-5p expression differ significantly in the skins of sheep with different hair colors;however,its function remains *** this study,we investigated the roles of miR-370-5p in sheep melanocytes and found that the overexpression of miR-370-5p significantly inhibited cell proliferation(P<0.01),tyrosinase activity(P=0.001)and significantly reduced(P<0.001)melanin *** prediction revealed that the 3′-untranslated region(UTR)of MAP3K8 has a putative miR-370-5p binding site,and the interaction between these two molecules was confirmed using luciferase reporter *** situ hybridization assays revealed that MAP3K8 is expressed in the cytoplasm of *** results of quantitative RT-PCR and Western blotting analyses revealed that overexpression of miR-370-5p in melanocytes significantly inhibits(P<0.01)MAP3K8 expression via direct targeting of its 3′*** of MAP3K8 expression by siRNA-MAP3K8 transfection induced a significant inhibition(P<0.01)of melanocyte proliferation and significant reduction(P<0.001)in melanin production,which is consistent with our observations for *** gene rescue experiments indicated that the expression of MAP3K8 in melanocytes co-transfected with miR-370-5p and MAP3K8-cDNA(containing sites for the targeted binding to miR-370-5p)was significantly rescued(P≤0.001),which subsequently promoted significant increases in cell proliferation(P<0.001)and melanin production(P<0.01).Collectively,these findings indicate that miR-370-5p plays a functional role in inhibiting sheep melanocyte proliferation and melanogenesis by downregulating the expression of MAP3K8.

关键词： microRNA mitogen-activated protein kinase kinase kinase 8 melanogenesis sheep melanocytes cell proliferation

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Highly Penetrable Silicone Emulsion for Water-Repellent Concrete with Reserved Surface Recoatability

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Journal of Wuhan University of Technology(Materials Science) 2022年第1期37卷 58-65页

作者： zhang qian zhang Guozheng YOU jun zhang Qunchao TAO Haizheng State Key Laboratory of Silicate Materials for Architectures(Wuhan University of Technology) Wuhan 430070China Hubei Key Laboratory of Polymer Materials Department of Materials Science and EngineeringHubei UniversityWuhan 430062China

Highly stable and permeable silicone emulsions were prepared by encapsulating N-octyl triethoaysilane microdroplets into micelles of NH_(2)-PDMS/SiO_(2).The conversion of siloxane to sub-1μm emulsions,on one hand,endows the concrete with a highly hydrophobic internal ***,its outside surface maintains relatively high surface energy,which is beneficial for the post-coating of other *** a result,the coated concreted can simultaneously acquire water repellency and low *** utilization of water-dispersed silicone emulsions,on the other hand,is beneficial for the environmental ***,this work offered a green procedure for the comprehensive protection of concrete.

关键词： concrete silicone waterproof recoatability emulsions

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Evaluating the tumor stratification with a lysosomal pH sensitive-probe by fluorescence lifetime imaging

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Chinese Chemical Letters 2024年第3期35卷 262-267页

作者： jun Yan Xing Liang qian zhang Luolin Wang Weiying Lin Guangxi Key Laboratory of Electrochemical Energy Materials Institute of Optical Materials and Chemical BiologySchool of Chemistry and Chemical EngineeringGuangxi UniversityNanning 530004China

Owing to the anaerobic metabolism in the tumor,abundant acidic metabolites are produced and accumulated in the ***,the cells in different tumor layers are directly linked to the pH ***,due to the lack of robust tools,the high-efficient evaluation of the acidic micro-environment of tumor stratification faces the challenge of accurate *** designed a new pH sensitive fluorescent lifetime probe target to *** we expected,the fluorescence lifetime of PLN possesses a good linear fit to the pH value,which could detect the pH change at a single lysosome level in real time,and then evaluate the different acidity of tumor *** probe PLN is successfully used to evaluate the tumor stratification by fluorescence lifetime imaging microscopy(FLIM)for the first time,which is of great significance in the preoperative diagnosis of clinical tumor treatment or evaluation of drug delivery effect.

关键词： FLIM pH Fluorescence imaging Lysosome Tumor imaging

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Experimental and numerical investigation of the impacts of rotor tip-rake on excitation forces of pump-jet propulsors

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Journal of Hydrodynamics 2024年第1期36卷 142-157页

作者： Xue-qin Ji Xiao-song zhang Chen-jun Yang Xiao-qian Dong State Key Laboratory of Ocean Engineering Marine Numerical Experiment CentreSchool of Naval ArchitectureOcean and Civil EngineeringShanghai Jiao Tong UniversityShanghai200240China CSSC Shanghai Marine Energy Saving Technology Co. Ltd.Shanghai200011China China Ship Scientific Research Center Shanghai Branch Shanghai200011China

The tip-clearance flow in a pump-jet propulsor exerts great impacts on the fluctuating pressures and resultant unsteady forces,which are important sources of structural vibrations and radiated noise *** blade geometry close to the tip is an important factor determining the vortex strength in the tip-clearance *** the open-water condition,the effects of raking the rotor tips on the duct-surface fluctuating pressures and the resultant unsteady forces acting on different components of the propulsor are investigated via physical model experiments and the numerical solution of Reynolds-averaged Navier-Stokes(RANS)equations coupled with the SST k-ωturbulence *** measured and simulated results of hydrodynamic pressures are consistent to each other,and the simulated flows help better understand why the fluctuating pressures change with the tip *** strong fluctuations of duct-surface pressures are caused by intensive tip separation *** duct-surface pressure fluctuations are effectively reduced by using the rake distribution near the tip towards blade back side and,for the combination of the five-bladed rotor and the seven-bladed stator,the resultant unsteady horizontal(and vertical)forces acting on the duct and stator are also reduced;while increasing rake leads to negative effect on pressure fluctuations and unsteady horizontal(and vertical)forces acting on all the components of the propulsor.

关键词： Pump-jet tip-clearance tip-rake fluctuating pressures excitation forces

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