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Heptanuclear brucite disk with cyanide bridges in a cocrystal and tracking its pyrolysis to an efficient oxygen evolution electrode

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Science Bulletin 2019年第22期64卷 1667-1674页

作者： jian-Qiang Zhao Dandan Cai Jun Dai Mohamedally Kurmoo Xu Peng Ming-hua zeng Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources Department of Chemistry and Pharmaceutical SciencesGuangxi Normal UniversityGuilin 541004China Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional MoleculesCollege of Chemistry and Chemical EngineeringHubei UniversityWuhan 430062China Institut de Chimie de Strasbourg CNRS-UMR7177Universite de Strasbourg67070 Strasbourg CedexFrance

The development of efficient oxygen evolution reaction(OER)catalysts is still lacking in exploration of the mechanism of controlled pyrolysis of precursors among new material ***,a novel Co-based coordination molecular cluster has been first introduced as precursor to obtain metallic cobalt core shelled by N-doped carbon(Co@NC)structure which operates as an oxygen evolution ***,a new cocrystal compound,[Co7II(l3-CN)6(mmimp)6][CoIICl3N(CN)2]á3CH3OH(Co7+1,mmimp=2-methoxy-6-((methylimino)-methyl)phenol),was isolated consisting of Brucite disks of cobalt where the usual bridging l3-OH is replaced by l3-CN produced by the in-situ decomposition of dicyanamide(NC-N-CNà).The cobalt atoms are bonded through the nitrogen atom of the ***,time dependent thermogravimetric-mass spectrometry(TG-MS)analysis was utilized to track its pyrolysis *** allowed us to propose a possible formation process of the Co@NC structure from Co7+***,an extremely superior OER electrode is optimized for Co@NC-600 having the lowest overpotential of257 m V at 10 m A/cm2in 1 mol/L KOH *** present study pins down the importance of clusters of transition metals on realizing distinct nanostructures operating as highly efficient OER electrocatalyst.

关键词： Cobalt disk clusters Thermogravimetry-mass spectrometry Pyrolysis tracking Core-shell nanostructure Oxygen evolution reaction

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Interrogating imaginary optical force by the complex Maxwell stress tensor theorem

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Light(Science & Applications) 2023年第1期12卷 12-14页

作者： Jinwei zeng jian Wang Wuhan National Laboratory for Optoelectronics and School of Optical and Electronic Information Huazhong University of Science and TechnologyWuhan 430074 HubeiChina Optics Valley Laboratory Wuhan 430074 HubeiChina

The complex Maxwell stress tensor theorem has been developed to relate the imaginary optical force,reactive strength of canonical momentum and total optical force of a nanoparticle,which is essential to perfect optica... 详细信息

关键词： imaginary tensor theorem

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Probing the Néel Order in Altermagnetic RuO_(2) Films via X-Ray Magnetic Linear Dichroism

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Chinese Physics Letters 2025年第2期42卷 78-87页

作者： Yi-Chi Zhang hua Bai Dong-Hui Zhang Chong Chen Lei Han Shi-Xuan Liang Rui-Yue Chu jian-Kun Dai Maciek Sawicki Feng Pan Cheng Song Key Laboratory of Advanced Materials(MOE) School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China Key Laboratory of Materials Modification by Laser Ion and Electron Beams(MOE)Dalian University of TechnologyDalian 116024China Institute of Physics Polish Academy of SciencesAleja Lotnikow 32/46PL-02668 WarsawPoland

The emerging altermagnetic RuO_(2)with both compensated magnetic moments and broken time-reversal symmetry possesses nontrivial magneto-electronic responses and nonrelativistic spin currents that are closely related to the magnetic easy *** M_(3)-edge X-ray magnetic linear dichroism(XMLD)measurements were performed to probe the Néel order in RuO_(2).For epitaxial RuO_(2) films,characteristic XMLD signals were observed for either RuO_(2)(100)or RuO_(2)(110)at normal incidence or RuO_(2)(001)at oblique *** signals disappeared when the test temperature exceeded the Néel *** non-epitaxial RuO_(2) films,the flat lines in the XMLD patterns of RuO_(2)(100)and RuO_(2)(110)demonstrate that there is no in-plane uniaxial alignment of the Néel order in these samples because of the counterbalanced Néel order of the twin crystals,as evidenced by X-ray diffraction phi-scan *** experimental results unambiguously demonstrate antiferromagnetism in RuO_(2) films and reveal the spatial relation of the Néel order parallel to the RuO_(2)[001]crystalline *** findings deepen the understanding of RuO_(2) and other attractive altermagnetic materials used in the field of spintronics.

关键词： temperature. magnetic nontrivial

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Short-range disorder in MOF glasses

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National Science Review 2021年第5期8卷 13-14页

作者： Ming-hua zeng Key Laboratory for the Chemistry and Molecular Engineering of Medicinal Resources School of Chemistry and Pharmaceutical SciencesGuangxi Normal University Hubei Collaborative Innovation Center for Advanced Organic Chemical Materials Ministry of Education Key Laboratory for the Synthesis and Application of Organic Functional MoleculesHubei University

Glass appears to be an ordinary material with wide applications in daily life and industry; however, its formation mechanism, phase transition and microscopic structure remain mysterious. It is accepted to be an amorphous solid exhibiting glass transition, with short-range(20?A)disorder structures [1]. Experimental determination of the structure of glass is crucial to understand its dynamic and physical properties.‘What is the nature of glass?’ is one of the most fundamental and challenging scientific questions [1].

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Polypropylene crisper and 1-MCP delay the softening,lignification and transcription levels of related enzyme genes of golden needle mushrooms(Flammulina velutipes)

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Journal of Integrative Agriculture 2022年第1期21卷 249-260页

作者： WANG Wen-jun LI Yao LI Fu-hua zeng Kai-fang MING jian College of Food Science Southwest UniversityChongqing 400715P.R.China Research Center of Food Storage&Logistics Southwest UniversityChongqing 400715P.R.China

The fresh postharvest golden needle mushroom(Flammulina velutipes) sporocarp has a high moisture content and crisp texture, but it still has high physiological activity and respiration, leading to senescence and quality *** with 1-methylcyclopropene(1-MCP) and polypropylene(PP) crispers were used to study the changes of lignification and softening of F. velutipes during storage. The main findings were as follows: the crisper packaging could effectively prolong the storage time of F. velutipes;either the 1-MCP treatment, crisper packaging or the combination of the two treatments could significantly inhibit the accumulation of lignin and the decreases in the contents of cellulose and pectin, and had certain inhibitory effects on the activities of enzymes involved in lignification and softening including phenylalanine ammonia-lyase(PAL), cinnamyl alcohol dehydrogenase(CAD), cellulase(Cx), pectin methylesterase(PME) and polygalacturonase(PG). Among them, the inhibitory effect of the crisper packaging was higher than the 1-MCP treatment, while the combination of the two treatments was the best. The results of transmission electron microscopy(TEM) and scanning electron microscopy(SEM) showed that the crisper packaging in combination with the 1-MCP treatment could effectively maintain the integrity and stability of the F. velutipes cellular structure and inhibit the emergence of plasmolysis to prevent cell membrane rupture. The transcription levels showed that the crisper packaging and the combination of the 1-MCP treatment and crisper packing could effectively affect the expression of genes for enzymes related to lignification and softening of F. velutipes. In conclusion, 1-MCP and PP crispers could delay the lignification and softening of F. velutipes during storage.

关键词： Flammulina velutipes polypropylene crisper 1-MCP softening and lignification transcription levels

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Production and Properties of a Thickener with Ability of Suspending Sand

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Journal of China University of Mining and Technology 2006年第2期16卷 115-118,122页

作者： QIN Bo-tao WANG De-ming LI zeng-hua CHEN jian-hua School of Mineral and Safety Engineering China University of Mining ＆ Technology Xuzhou Jiangsu 221008 China

To overcome the shortcomings of pouring sands, a thickener with the ability to suspend sands was developed. It is mixed with sands to form densified slurry, and can insure the sands against deposition, jamming pipelines and de- hydration. The chemical structure of the thickener is introduced in this paper and the production process is studied. The main processes include immersion, decomposition, dilution and addition of additives. In order to produce a thickener with high viscosity to suspend sands, key factors must be controlled in each process: the immersion time is 2 h; the mass fraction of formaldehyde is 0.01% and mass of NaCO3 accounts for 15% of dry material; the water temperature is 65 ℃ in summer and 72 ℃ in winter and the decomposition time is 2 h in the reaction; the densified decomposition so- lution should be diluted to 1% mass fraction; the additives of calcium ions and pH indicators must be added to the di- luted liquid; the mass fraction of CaCl2 is 0.048% and the pH value of the solution is 7.5. The thickener is a gel with three-dimensional network structure, a liquid with non-Newtonian behaviour and the characteristics of pseudo-plastic material, a solution with little resistance and the ability to revive its oral primary viscosity. It has been successfully ap- plied in Shendong Mines and has great value and wide-spread prospective use.

关键词： thickener ability of suspending sand spontaneous combustion of coal

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燃气轮机排气扩压器结构对气动性能影响的数值模拟研究

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热能动力工程 2025年第1期40卷 59-68页

作者：曾令艳施奇良张华李新元上海电机学院机械学院上海201306 中国联合重型燃气轮机技术有限公司上海201306

为提高重型燃气轮机排气扩压器的气动性能,利用数值模拟方法对某重型燃气轮机排气系统的扩压器结构进行研究,依据静压恢复系数(Cp)、总压损失系数(Cp_(t))和同轴度(ϑ)等参数评价排气扩压器系统的气动性能。研究得出:在支撑板与导片轴向... 详细信息

为提高重型燃气轮机排气扩压器的气动性能,利用数值模拟方法对某重型燃气轮机排气系统的扩压器结构进行研究,依据静压恢复系数(Cp)、总压损失系数(Cp_(t))和同轴度(ϑ)等参数评价排气扩压器系统的气动性能。研究得出:在支撑板与导片轴向距离变化时,Cp系数和Cp_(t)系数没有得到提升,气动性能反而下降;支撑板与导片旋转角度增加时,Cp系数先增加再减小,Cp_(t)系数先减小再增加;旋转角度为20°时相较于旋转角度为0°时的Cp系数提高了4.27%,Cp_(t)系数降低了7.71%,且此时ϑ系数高,Cp系数径向分布均匀、周向差别小。

关键词：燃气轮机排气扩压器气动性能数值模拟

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以消化道症状首发的老年Loeffler心内膜炎患者1例

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中华老年医学杂志 2025年第1期44卷 74-76页

作者：华静潘亚杰曾庆磊武利萍河南大学第一附属医院消化内科开封475000 郑州大学第一附属医院感染科郑州450052

Loeffler心内膜炎是由于嗜酸性粒细胞浸润造成心内膜及心肌进行性纤维化的一种罕见疾病,早期多无典型临床表现,病死率高。本文报道1例因消化道症状就医的老年Loeffler心内膜炎患者,总结其诊疗经验及复习相关文献报道,以期加深临床医师... 详细信息

Loeffler心内膜炎是由于嗜酸性粒细胞浸润造成心内膜及心肌进行性纤维化的一种罕见疾病,早期多无典型临床表现,病死率高。本文报道1例因消化道症状就医的老年Loeffler心内膜炎患者,总结其诊疗经验及复习相关文献报道,以期加深临床医师对该疾病的认识,做到早期诊断并给予及时有效的治疗、监测病情变化,从而改善患者预后。

关键词：心内膜炎嗜酸粒细胞增多纤维化

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Effect of different doping elements on performance of Ce-Mn/TiO_(2)catalyst for low temperature denitration

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Journal of Rare Earths 2023年第5期41卷 689-697,I0002页

作者： Lihua huang jian hua Insititute of Environment and Resources Southwest University of Science and TechnologyMianyang 621010China National Engineering Research Center for Flue Gas Desulfurization Chengdu 610065China

Sm and Ho were doped in Ce-Mn/TiO_(2)catalyst respectively to enhance its denitration performance at low temperature.X-ray diffraction(XRD),N2adsorption-desorption,X-ray photoelectron spectroscopy(XPS),NH3-temperature programmed desorption(NH3-TPD),H2-temperature programmed reduction(H2-TPR)and in situ diffuse reflectance infrared Fourier transform spectroscopy(DRIFTS)techniques were used to analyze the structure and performance of *** results demonstrate that Ho doping increases the amount of acid sites and improves low temperature redox property of Ce-Mn/TiO_(2),which lead to excellent DeNOxperformance of Ho-Ce-Mn/TiO_(2)in the whole reaction temperature *** doping results in decline of redox property,but it is beneficial to increasing the acid sites of Ce-Mn/TiO_(2).The increased surface acid sites and moderate oxidative ability impart Sm-Ce-Mn/TiO_(2)higher denitration activity and N2selectivity at temperature above 150℃.Lewis acid sites and redox property are the main factors affecting the activity of *** of Ho and Sm both improves sulfur resistance performance of Ce-Mn/TiO_(2)by inhibiting the adsorption of SO_(2)and formation of ***-Mn/TiO_(2)modified by Ho shows better sulfur resistance than that doped with Sm because of its more surface acid sites.

关键词： Ce-Mn/TiO_(2)catalyst Doping Sm Ho Denitration performance Rareearths

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The Effects of Different Sex-Linked Dwarf Variations on Chinese Native Chickens

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Journal of Integrative Agriculture 2012年第9期11卷 1500-1508页

作者： OUYANG jian-hua XIE Liang NIE Qing-hua zeng hua PENG Zhi-jun ZHANG De-xiang ZHANG Xi-quan Department of Animal Science College of Animal Science and Technology Jiangxi Agricultural University Nanchang 330045 P.R. China Department of Animal Genetics Breeding and Reproduction College of Animal Science South China Agricultural University Guangzhou 510642 P.R.China Guangdong Wens Foodstuff Company Ltd. Guangdong 527439 P.R.China Institute of Animal Science & Veterinary Hainan Academy of Agricultural Sciences Haikou 571100 P.R.China

Variants in chicken growth hormone receptor （GHR） gene lead to sex-linked dwarf （SLD） chickens, but effects of different variants are distinct. In this study, 11 SLD chicken breeds or strains including 3 Chinese native breeds and 8 breeding strains were studied in order to investigate the effects of different sex-linked dwarf variations on growth performance. The results showed that there were three reasons which could lead to dwarfism in the 11 breeds or strains. Firstly, an about 1.7 kb deletion of growth hormone receptor （GHR） gene leads to dwarfism in jiangxi dwarf chicken, strains GF24, GF26, N308, N309, and N310. Secondly, a T354C mutation in exon 5 of the GHR gene leads to dwarfism in strains N301 and N305. Thirdly, an unknown variant leads to dwarfism in Guizhou Yellow Dwarf chicken and Yixing Bantam chicken. In addition, all individuals of N303 had the 1.7 kb deletion of the GHR gene, and additionally, some of them also carried the T354C mutation. As far as the performance of individuals were compared among T354C homozygote, deletion homozygote, and heterozygote carrying both T354C and deletion, it was found that the T354C＇s impacts on body weight of Chinese chickens were maximum, the body weight of chickens with homozygote T354C was 92.12% of those with heterozygote, and the difference of the body weight between deletion homozygote and heterozygote was not significant. There was no significant difference of shank length among three genotypes.

关键词： SLD chicken GHR dwarf allele phenotypic effect

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