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Nano Research 2020年第3期13卷 818-823页

作者： Huihui Jin Huang Zhou Pengxia Ji chengtian zhang Jiahuan Luo Weihao Zeng Chenxi Hu Daping He Shichun Mu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Hubei Engineering Research Center of RF-Microwave Technology and Application Wuhan University of TechnologyWuhan 430070China Department of Chemical and Environmental Engineering Anyang Institute of TechnologyAnyang 455000China

Iron-based oxygen reduction reaction(ORR)catalysts have been the focus of research,and iron sources play an important role for the preparation of efficient ORR ***,we successfully use LiFePO4 as ideal sources of Fe and P to construct the heteroatom doped Fe-based carbon *** obtained Fe-N-P co-doped coral-like carbon nanotube arrays encapsulated Fe2P catalyst(C-ZIF/LFP)shows very high half-wave potential of 0.88 V in alkaline electrolytes toward ORR,superior to Pt/C(0.85 V),and also presents a high half-wave potential of 0.74 V in acidic electrolytes,comparable to Pt/C(0.8 V).When further applied into a home-made Zn-air battery as cathode,a peak power density of 140 mW·cm^-2 is reached,exceeds commercial Pt/C(110 mW·cm^-2).Besides,it also presents exceptional durability and methanol resistance compared with Pt/***,the preparation method of such a high-performance catalyst is simple and easy to optimize,suitable for the large-scale ***’s more,it opens up a more sustainable development scenario to reduce the hazardous wastes such as LiFePO4 by directly using them for preparing high-performance ORR catalysts.

关键词： LiFePO4 waste utilization ZIF-8 heteroatoms-doped oxygen reduction reaction

Single-Atom Catalysts for Electrochemical Hydrogen Evolution Reaction: Recent Advances and Future Perspectives

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Nano-Micro Letters 2020年第2期12卷 73-101页

作者： Zonghua Pu Ibrahim Saana Amiinu Ruilin Cheng Pengyan Wang chengtian zhang Shichun Mu Weiyue Zhao Fengmei Su Gaixia zhang Shijun Liao Shuhui Sun Institut National de la Recherche Scientifique-Énergie Matériaux et Télécommunications VarennesQC J3X 1S2Canada State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070People’s Republic of China The Key Laboratory of Fuel Cell Technology of Guangdong Province The Key Laboratory of New Energy Technology of Guangdong UniversitiesSchool of Chemistry and Chemical EngineeringSouth China University of TechnologyGuangzhou 510641People’s Republic of China Key Laboratory of Materials Processing and Mold Ministry of EducationZhengzhou UniversityZhengzhou 450002People’s Republic of China

Hydrogen,a renewable and outstanding energy carrier with zero carbon dioxide emission,is regarded as the best alternative to fossil *** most preferred route to large-scale production of hydrogen is by water electrolysis from the intermittent sources(e.g.,wind,solar,hydro,and tidal energy).However,the efficiency of water electrolysis is very much dependent on the activity of ***,designing high-effective,stable,and cheap materials for hydrogen evolution reaction(HER)could have a substantial impact on renewable energy ***,single-atom catalysts(SACs)have emerged as a new frontier in catalysis science,because SACs have maximum atom-utilization efficiency and excellent catalytic reaction *** synthesis methods and analytical techniques have been adopted to prepare and characterize these *** this review,we discuss recent progress on SACs synthesis,characterization methods,and their catalytic ***,we highlight their unique electrochemical characteristics toward ***,the current key challenges in SACs for HER are pointed out and some potential directions are proposed as well.

关键词： Single-atom catalysts Nanomaterials Electrocatalyst Hydrogen evolution reaction Electrochemical energy conversion

In situ generated layered NiFe-LDH/MOF heterostructure nanosheet arrays with abundant defects for efficient alkaline and seawater oxidation

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Nano Research 2023年第7期16卷 8945-8952页

作者： Manjie Xiao Can Wu Jiawei Zhu chengtian zhang Yan Li Jiahui Lyu Weihao Zeng Haiwen Li Lei Chen Shichun Mu State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China Foshan Xianhu Laboratory Foshan 528200China Science and Technology Institute of Advanced Technology Wuhan 430051China Hefei General Machinery Research Institute Hefei 230031China

As the main limiting step of overall water splitting,oxygen evolution reaction(OER)is urgent to be enhanced by developing efficient catalysts to promote the process of electrolytic *** on theoretical analysis,the Ni-metal-organic framework(Ni-MOF)and NiFe-layered double hydroxide(NiFe-LDH)(NiFe-LDH/MOF)heterostructure can optimize the energy barrier of the OER process and decrease the adsorption energy of oxygen-containing intermediates,effectively accelerating the OER ***,layered NiFe-LDH/MOF heterostructures are in situ constructed through a facile two-step reaction process,with substantial oxygen defects and lattice defects that further improve the catalytic *** a result,only 208 and 275 mV OER overpotentials are needed for NiFe-LDH/MOF to drive the current densities of 20 and 100 mA·cm^(-2)in 1 M KOH solutions,and even maintain catalytic stability of 100 h at 20 mA·cm^(-2).When applied to seawater oxidation,only 235 and 307 mV OER overpotentials are required to achieve the current densities of 20 and 100 mA·cm^(-2),respectively,with almost no attenuation for 100 h stability test at 20 mA·cm^(-2),all better than commercial RuO_(2).This work provides the theoretical and experimental basis and a new idea for efficiently driving fresh water and seawater cracking by heterostructure and defect coupling design toward catalysts.

关键词： oxygen evolution reaction defects seawater electrolysis catalyst

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轴承漏失量与润滑脂组成和性能的关系简析

合成润滑材料 2013年第4期40卷 17-18页

作者：张成天中国石油化工股份有限公司润滑油茂名分公司茂名525011

以癸二酸双酯或矿物油制备的聚脲润滑脂轴承漏失量较小。用硅油制备的聚脲润滑脂或酰胺润滑脂的钢网分油越小,润滑脂抗轴承漏失性能越好。

关键词：润滑脂组成钢网分油轴承漏失量

L-S耦合时p~N、d~N、f~N组态的三粒子亲态比系数

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上海师范学院学报(自然科学版) 1983年第1期 13-23页

作者：冯承天张民生

我们在[1]中讨论了j—j耦合时的三粒子亲态比系数。在本文中,我们应用二次量子化的方法,讨论L-S耦合时p~N,d~N,f~N组态中的三粒子亲态比系数,导出了计算它们的明显公式,以及它们的对称性质。利用这种系数,本文给出了求p~N,d~N,f~N组态... 详细信息

我们在[1]中讨论了j—j耦合时的三粒子亲态比系数。在本文中,我们应用二次量子化的方法,讨论L-S耦合时p~N,d~N,f~N组态中的三粒子亲态比系数,导出了计算它们的明显公式,以及它们的对称性质。利用这种系数,本文给出了求p~N,d~N,f~N组态中各项的行列式乘积态结构的一般方法。本文的结果可推广到更一般的情况中去。

关键词：组态行列式 d~N f~N L-S

原子体系中的对称性(Ⅰ)——对称性群和态的分类

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上海师范学院学报(自然科学版) 1982年第3期 35-42页

作者：冯承天张民生

本文应用二次量子化的方法导出原子体系在 L-S 耦合时的对称性群,并依次对态进行分类。关于算符在相应情况下的分类及这一理论的应用,我们将在“Ⅱ维格纳-爱卡儿脱定理及算符的分类”一文中详述。

关键词：对称性群藕合算子泛函分析算符子代数括号积生成元群链分子原子

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原子结构中的完全准旋群SO(4)

上海师范学院学报(自然科学版) 1984年第3期 15-18页

作者：冯承天张民生

本世纪六十年代,Judd在原子结构中引入了准旋的概念,从而把有关前辈数的问题简化为角动量理论的应用,本文应用二次量子化的方法在原子结构中引入完全准旋群SO(4),讨论了该群与自旋群以及准旋群三者之间的关系。应用这一物理模型,我们得... 详细信息

本世纪六十年代,Judd在原子结构中引入了准旋的概念,从而把有关前辈数的问题简化为角动量理论的应用,本文应用二次量子化的方法在原子结构中引入完全准旋群SO(4),讨论了该群与自旋群以及准旋群三者之间的关系。应用这一物理模型,我们得出了l=1;2,3时,SO(8l+4)→SO(4)×SO(2l+1)以及US_p(4l+2)→SUs(2)×SO(2l+1)的一些分歧律。

关键词： SO 角动量理论二次量子化生成元交换子物理模型对称性群伴随表示核结构不可约表示

不同温度处理对毛酸浆花芽分化和生理特性的影响

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干旱地区农业研究 2023年第6期41卷 88-96页

作者：徐文娟刘丹丹王雅楠张承天唐菁乔鸿凯刘晨旭安徽农业大学园艺学院安徽合肥230036 淮南市农业科学研究院安徽淮南232000

为探讨温度对毛酸浆花芽分化的影响,以‘大黄菇娘’毛酸浆品种为试验对象,在花芽分化期分别设置27℃/20℃(CK)、23℃/16℃(T1)、31℃/24℃(T2)和35℃/28℃(T3)4个不同温度处理,研究毛酸浆花芽的形态分化过程变化及花芽分化进程中内源激... 详细信息

为探讨温度对毛酸浆花芽分化的影响,以‘大黄菇娘’毛酸浆品种为试验对象,在花芽分化期分别设置27℃/20℃(CK)、23℃/16℃(T1)、31℃/24℃(T2)和35℃/28℃(T3)4个不同温度处理,研究毛酸浆花芽的形态分化过程变化及花芽分化进程中内源激素、碳水化合物、抗氧化酶等生理指标的变化。结果表明:低温(T1)和CK处理条件下,毛酸浆花芽分化进程基本相同;而高温处理(T2和T3)的花芽分化启动时间较CK处理提前,且在5L期花芽分化已达50%及以上,高温处理下的萼片原基分化不能形成闭合的套状结构,后期表现为果实裸露在宿存花萼的外部;CK和T1处理的果实均是正常果,但高温处理下畸形果比例达到50%以上。不同处理在3L期全氮含量表现为T3T2>CK>T1。高温处理下的SOD活性呈先降低后升高趋势,并且在4L期SOD活性分别比CK处理提高24.5%和25.9%。高温处理下POD活性呈先升高后降低趋势,表现为T3>T2>CK。随着分化进程,高温处理下ABA、IAA、ZR和GA3含量在3L期达到最高值,而低温和CK处理在4L期才达到最高值;其中在3L期,T2和T3处理IAA含量分别比CK处理提高31.5%和62.5%,GA3含量分别比CK处理提高107.4%和87.9%,T2和T3处理的ABA/IAA、ZR/IAA比值均低于CK处理;在毛酸浆花芽分化过程中,T1处理的ABA/GA3比值高于其他3个处理,与CK相比提高24.1%~37.8%。CK条件下,毛酸浆在3L期积累了大量的可溶性糖和果糖,其中可溶性糖分别比T1、T2、T3处理提高75.8%、33.6%、16.8%。综上可知,不同温度处理会影响毛酸浆的花芽分化,高温能够促进激素合成,影响氮含量和可溶性糖、果糖的积累,调控抗氧化酶活性,促进毛酸浆的花芽分化,但会导致畸形果的产生。

关键词：毛酸浆温度处理花芽分化生理特性

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一例大林羚肠毒血症的诊断

野生动物学报 2022年第3期43卷 788-792页

作者：郑秉武智宇李彦军丁玉林高雅刘佳利张承天王金玲呼和浩特市动物园呼和浩特010050 内蒙古自治区农牧业科学院呼和浩特010051 内蒙古阿拉善右旗动物疫病预防控制中心阿拉善右旗737300 内蒙古农业大学兽医学院和农业农村部动物疾病临床诊疗技术重点实验室呼和浩特010010

通过临床病史、剖检病变、组织病理学、触片检查和毒素试验方法确诊了1例大林羚(Tragelaphus oryx)肠毒血症。1只15岁大林羚无任何临床症状突然死亡,尸体角弓反张,典型病变为十二指肠和空肠严重出血性肠炎,肠壁变薄,肠管内有较多黑红色... 详细信息

通过临床病史、剖检病变、组织病理学、触片检查和毒素试验方法确诊了1例大林羚(Tragelaphus oryx)肠毒血症。1只15岁大林羚无任何临床症状突然死亡,尸体角弓反张,典型病变为十二指肠和空肠严重出血性肠炎,肠壁变薄,肠管内有较多黑红色血样内容物,肠黏膜呈弥漫性暗红色与黑红色,皱胃黏膜有大小不等的出血性坏死灶。特征性组织学病变为严重的出血性坏死性肠炎、中毒性肝损伤和中毒性肾损伤。十二指肠和空肠黏膜层出血、坏死,多数区域呈均质红染;肝细胞和肾小管上皮细胞严重变性、散在坏死。在肠黏膜触片上可见散在或成簇分布的单个或成双的革兰阳性粗大的产气荚膜梭菌(Clostridium perfringens)。小白鼠毒素试验结果显示,接种肠内容物后13~18 h试验小白鼠均死亡。

关键词：大林羚肠毒血症出血性坏死性肠炎中毒性肝损伤产气荚膜梭菌

Somite-specific expression of a novel fibronectin variant FN3 is negatively regulated by SHH

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Chinese Science Bulletin 2002年第21期47卷 1807-1811,1850页

作者： ZHAO chengtian zhang Yu SU Ying MENG Anming Department of Biological Science and Biotechnology The Protein Science Laboratory of the Ministry of EducationTsinghua UniversityBeijing 100084China

Fibronectins (FNs) are major extracellular proteins in blood plasma and many tissues of vertebrates, and play important roles in adhesion, migration and differentiation of cells. We have identified a novel variant (FN3) of fibronectin in zebrafish. FN3 mRNA is abundant, as detected by whole-mount in situ hybridization, in the presomitic mesoderm and the newly formed somites, but less abundant in mature somites. Ectopic expression of Sonic Hedgehog (SHH) results in a decrease of FN3 expression, whereas the expression level of FN3 increases in the flhi mutants that lack the notochord. Our results suggest that FN3 may be involved in the formation of somites, but during somite differentiation its expression needs to be downregulated by signals derived from the axial tissues.

关键词： zebrafish fibronectin somite somitogenesis extracellu-lar matrix SHH flh.