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Asymmetric fireproof gel polymer electrolyte constructed by boron-contained covalent organic framework for dendrite-free sodium metal battery

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Nano Research 2024年第11期17卷 9679-9687页

作者： Zhanming Liu Rui Wang Jiayi Yu zhengrui miao Zijian Xu Jianguo Ren Suli Chen Tianxi Liu Key Laboratory of Synthetic and Biological Colloids Ministry of Education School of Chemical and Material Engineering Jiangnan University Wuxi 214122 China BTR New Material Group Co. Ltd. Shenzhen 518000 China

Gel polymer electrolytes (GPEs) with flexibility, easy processability, and low cost have been regarded as promising alternatives for conventional liquid electrolytes in next-generation sodium metal batteries (SMBs). However, GPEs often suffer from combustion risk and inferior interfacial compatibility toward Na metal anode, which severely limit their wide commercial applications. Here, a rational design of asymmetric fireproof GPE (AFGPE) modified with a boron-contained covalent organic framework (BCOF) on one side is developed through in-situ crosslinking polymerization process. Benefiting from the unique structure and composition, the resulting AFGPE exhibits high Na+ transference number, wide electrochemical window, excellent mechanical properties and high safety. Especially, the nanoscale BCOF layer with uniform nanochannels works as ion sieve that homogenizes Na+ flux during Na plating process, while the abundant Lewis-acid B sites can strongly capture counter anions and decrease space charge layer at anode side, thus promoting the uniform Na deposition to effectively suppress dendrite growth. Consequently, the Na/AFGPE/Na symmetric cells demonstrate remarkable cycling stability for over 1200 h at 0.1 mA·cm^(-2), and the solid-state SMBs exhibit outstanding cycling properties and rate capability, delivering a high capacity retention of 96.4% under current density of 1 C for over 1000 cycles.

关键词： gel polymer electrolyte sodium metal battery covalent organic framework flame-retardant interfacial stability

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Possibility of rapidly reporting ^(226)Ra activity in ^(226)Ra-^(222)Rn samples with unknown equilibrium factor by γ spectrometer

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Nuclear Science and Techniques 2004年第3期15卷 177-182页

作者： SUQiong zhengrui CHENYong CHENGJian-Ping InstituteofNuclearTechnology DepartmentofEngineeringPhysicsTsinghuaUniversityBeijing100084

This paper reports the observed changes for equilibrium factors between 226Ra and 222Rn with sealing time of the samples. The samples include soil, raw coal, mineral water, cement, rock, etc. Especially the conceptions of “pre-equilibrium time” and “pre-equilibrium factor” have been put forward and methods of measuring and proc- essing data have been given which can be used for rapidly reporting activity of 226 Ra in samples with unknown equi- librium factor. It is definitely concluded that, using methods given in the paper, a test report will be completed in 3~7 days, instead of one month, after receiving the sample whose activity is not lower than LLD of the spectrometer.

关键词： γ光谱分析仪镭-氡样品长期放射性平衡环境分析放射化学

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Numerical analysis of turbulent mixed convection air flow in inclined plane channel with k-εtype turbulence model

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Nuclear Science and Techniques 2008年第2期19卷 121-128页

作者： XIE zhengrui YANG Yanhua GU Hanyang CHENG Xu School of Nuclear Science and Engineering Shanghai Jiaotong University Shanghai 200240 China

Numerical study on turbulent mixed convection in inclined plane channels,from 15° to 90° (vertical),was carried out to examine the effect of inclination on fluid flow and heat transfer *** turbulent air flows upward or downward into the duct with one wall heated from *** results with several kinds of k-εtype turbulence models were used to compare the experimental data with those in literatures to determine suitable *** dependents of Nusselt number on the inclination angle of both the buoyancy-aided and buoyancy-opposed flow are discussed.

关键词：混合对流 k-ε模型湍流模型主测线渠道

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Flowering on Time： Multilayered Restrictions on FT in Plants

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Molecular Plant 2017年第11期10卷 1365-1367页

作者： Qin, zhengrui Bai, Yuxue Wu, Liang Zhejiang Univ Dept Agron Coll Agr & Biotechnol Hangzhou 310058 Zhejiang Peoples R China

The successful transition from vegetative to reproductive growth directly influences plant biomass and fitness. The regulation of flowering time has been investigated for over two decades, with several molecular modules having been characterized, functioning in the photoperiod, vernalization, autonomous, aging, or phytohormone pathways. Although the upstream components of these flowering pathways differ among plant species, most endogenous and external cues are ultimately integrated to control a highly conserved protein, FLOWERING LOCUS T （FT）, to ensure that flowering is initiated at an appropriate time.

关键词： Flowering on Time Multilayered Restrictions FT in Plants

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Cytogenetic Mechanism for the Aneuploidy and Mosaicism Foundin Tetraploid Pacific Oyster Crassostrea gigas （Thunberg）

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Journal of Ocean University of China 2014年第1期13卷 125-131页

作者： Zhang, zhengrui Wang, Xinglian Zhang, Quanqi Allen, Standish College of Marine Life Sciences Key Laboratory of Marine Genetics and Breeding of Ministry of Education Ocean University of China Qingdao P. R. China Aquaculture Genetics and Breeding Technology Center Virginia Institute of Marine Science College of William and Mary Gloucester Point USA

Chromosome constitution was investigated in adult tetraploid Pacific oyster produced by blocking the first polar body oftriploid eggs which were fertilized with haploid sperms. A high incidence of aneuploid and heteroploid mosaics were found amongthe offspring. Of 20 individuals identified, only 9 （45%） were eutetraploid which contained 40 chromosomes; 2 （10%） were ane-uploid （hypotetraploid）, which contained 39 and 38 chromosomes, respectively; and 9 （45%） were heteroploid mosaics. One mosaicwas consisted of cells containing 40 and 39 chromosomes, respectiovely （1：1 in cell number）, while the other 8 were consisted ofcells containing chromosomes varying between tetraploid and triploid. It was also interesting to note that 3 mosaics even containedsome diploid cells with 20 chromosomes. A certain number of cells of 2 tetraploids and 8 mosaics spread with 32-37 well-scatteredand some clumped chromosomes at metaphase. The percentage of aneuploid cells with chromosomes varying between triploid andtetraploid correlated significantly with that of heteroploid mosaics cells with clumping chromosomes （P〈0.05）. Our findings sug-gested that reversion existed in both tetraploid and triploid oyster and chromosome clumping may underline the chromosome elimi-nation in tetraploid oyster. It seems that the reversing cells, at least some of them, continuously eliminate their chromosomes until themost stable diploid state is established.

关键词： tetraploid oyster aneuploidy mosaicism reversion cytogenetic mechanism

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Expression Characteristics and Potential Function of Neuropeptide MIP in Larval Settlement of the Echiuran Worm Urechis unicinctus

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Journal of Ocean University of China 2022年第4期21卷 977-986页

作者： LU Li ZHANG Zhifeng ZHENG Qiaojun CHEN Zongtao BAI Shumiao ZHANG zhengrui Ministry of Education Key Laboratory of Marine Genetics and Breeding College of Marine Life SciencesOcean University of ChinaQingdao 266003China Key Laboratory of Tropical Aquatic Germplasm of Hainan Province Sanya Oceanographic InstitutionOcean University of ChinaSanya 572000China Qingdao Dayi HC Biotechnology Co. Ltd.Qingdao 266003China

Larval settlement and metamorphosis are important developmental events in marine *** neuropeptides may play a key role in these *** this study,we revealed the expression characteristics of myoinhibitory peptide(MIP)in the embryos and larvae of the echiuran worm Urechis unicinctus using RT-qPCR,in situ hybridization and immunofluorescence techniques,and found its location in the top cells of the upper hemisphere was conservative in ***,we used the active MIP peptide to verify its role in inducing the larval settlement of ***,and confirmed that MIP can trigger an obvious larval settlement when 10μmol L^(−1) or 15μmol L^(−1) MIP was added in the seawater where early-segmentation larvae were *** finding indicated that neuropeptide MIP participates in the larval settlement in ***.

关键词： Urechis unicinctus neuropeptide MIP larval settlement

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Preferential Bivalent Formation in Tetraploid Male of Pacific Oyster Crassostrea gigas Thunberg

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Journal of Ocean University of China 2014年第2期13卷 297-302页

作者： ZHANG zhengrui WANG Xinglian ZHANG Quanqi Standish Allen Jr. College of Marine Life Sciences Key Laboratory of Marine Genetics and Breeding of Ministry of EducationOcean University of China Aquaculture Genetics and Breeding Technology Center Virginia Institute of Marine ScienceCollege of William and Mary

Artificially induced tetraploid Pacific oyster, Crassostrea gigas Thunberg, produces more aneuploid gametes than nor- mal diploid one, although they showed a comparable fecundity to diploidy. The meiotic chromosome configuration of 3 tetraploid and 1 tetraploid/triploid mosaic males were analyzed through direct chromosome observation. A majority of metaphase I spermato- cytes contained both bivalents and quadrivalents. The chromosome configuration of these males was characterized by preferential formation of bivalents to quadrivalents. Bivalents appeared in all spermatocytes and consisted of 86% of all chromosome aggregates. In comparison, quadrivalents occurred in 91% spermatocytes and consisted of only 12.6% of all chromosome aggregates. The mean bivalent frequency per spermatocyte varied between 14.4 and 17.2; while that of quadrivalents varied between 2.2 and 2.7. Most quadrivalents were tandemly chained （58%） or circled （39%）. The total number of chromosome aggregates per spermatocyte ranged from 13 to 20 with an average of 17.6; while 18 （16 bivalents and 2 quadrivalents） was the most frequent. Univalents and trivalents appeared in very low frequency. Aneuploid （hypotetraploid） spermatocytes were observed in a low frequency. The chromosome con- figuration of in the mosaic individual was similar to that of tetraploid individuals. The percentage of triploid spermatocytes （2%） of the mosaic individual was significantly lower （2＂2 =30, P〈 0.01） than that of triploid cells （46%） in its somatic tissue.

关键词： tetraploid oyster meiosis bivalent quadrivalent reversion

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Study on Energy Law of Similitude for Laser Propulsion in Repetitively-pulsed Mode

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Chinese Journal of Aeronautics 2009年第6期22卷 583-589页

作者： Hong Yanjia Cao zhengrui Li Qian Department of Basic Theories Academy of Equipment Command and Technology Beijing 101416 China Department of Postgraduates Academy of Equipment Command and Technology Beijing 101416 China

Energy law of similitude for laser propulsion refers to the law that there is an optimum nozzle configuration for the largest value of impulse coupling coefficient at certain incident laser energy. A dimensionless factor combined with incident laser energy, nozzle configuration parameters and working gas parameters is introduced. Energy law of similitude is established by means of theoretical analysis, experimental study and numerical simulation of radiation gas-dynamics. The qualitative results obtained from theoretical analysis are verified by experimental and numerical results. Physical meaning and engineering application of dimensionless factor and energy law of similitude are analyzed. Results indicate that ① impulse coupling coefficient has a maximurn value with dimensionless factor of about 0.4; ② impulse coupling coefficient is independent of incident laser energy when dimensionless factor is constant. Conclusions and recognitions acquired in this article can not only present optimum nozzle configurations for the present laser energy level, but also provide a good guide for the optimum nozzle configuration design once the laser energy is amplified to a high level.

关键词： laser propulsion law of similitude repetitively-pulsed mode conical nozzle parabolic nozzle impulse coupling coefficient

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Investigation on Mechanism of Altitude Characteristic for Air-breathing Pulsed Laser Thruster

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Chinese Journal of Aeronautics 2010年第1期23卷 33-38页

作者： Hong Yanji,Wen Ming,Cao zhengrui Department of Basic Theories,Academy of Equipment Command & Technology,Beijing 101416,China Department of Basic Theories Academy of Equipment Command & Technology Beijing 101416 China

Altitude characteristic is of great importance for studying when an air-breathing pulsed laser thruster works in the dense atmosphere condition of 0-30 km altitude. The experimental findings all over the world show that the similar relationship between impulse coupling coefficient and altitude. According to strong explosion theory and an ideal gas model,a dimensionless factor indicating energy law of similitude is introduced,and formula of impulse coupling coefficient is deducted. Then theoretical study of altitude characteristic is carried out and mechanism of altitude characteristic is further explained. The results indicate that there is a maximum value of impulse coupling coefficient if the dimensionless factor equals to 0.41 in theory, and whether the phenomena of maximum appear or not depends on the range of the dimensionless factor related to altitude. As to a conical nozzle with the fixed length of 120 mm, the relationship between the sonic velocity and the dimensionless factor causes the maximum phenomenon at the altitude of about 12.5 km,and maximum theoretical impulse coupling coefficient is also found in the experimental investigations. The mechanism of altitude characteristic for air-breathing pulsed laser thruster is discovered in this article, which will provide reference for further research on altitude characteristic.

关键词： laser propulsion air-breathing mode altitude characteristic dimensionless factor maximum phenomenon

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On the Essentiality of Pre-listening in English Listening Teaching

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基础教育外语教学研究 2011年第1期 33-37页

作者： Wang zhengrui The University of Sheffield

Listening competence is usually taken as a ditticult skill and of a primary role m language teaching and learning. Also the issue about how to teach listening effectively and efficiently is always controversial in lan... 详细信息

关键词：摘要编辑部编辑工作读者

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