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The preface: Toward higher-Tc superconductivity under lower pressure——from binary to ternary superhydrides

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National Science Review 2024年第7期11卷 7-8页

作者： fu.chun Zhang Ho-kwang mao Xin-Cheng Xie Kavli Institute for Theoretical Sciences University of Chinese Academy of Sciences Shanghai Advanced Research in Physical Sciences Center for High Pressure Science and Technology Advanced Research International Center for Quantum Materials School of Physics Peking University

Superconductivity——the phenomenon of complete vanishing of electrical resistance and expulsion of magnetic field——is the paramount electromagnetic property for technological advancement that is only shackled by th...

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Blue Luminescent Zinc(II)-and Cadmium(II)-1,4-phenylenediacetate Complexes

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Chinese Journal of Structural Chemistry 2006年第10期25卷 1161-1166页

作者： XU Yan-Qing ZHOU You-fu YUAN Da-Qiang HONG mao-chun State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

Two mixed-ligand polymeric complexes formulated as {[Zn（pda）（bpy）]·0.5H2O}n （pda = 1,4-phenylenediacetate, bpy = 2,2＇-bipyridine） 1 and {[Cd（pda）（bpy）]·1.5H2O}n 2 have been hydrothermally synthesized. Single-crystal X-ray diffraction analyses reveal that the structures of complexes 1 and 2 possess similar one-dimensional zigzag chains. Crystal data for compound 1： monoclinic, space group P21/c, a = 15.965（2）, b = 8.305（1）, c= 14.856（2） °A, β= 111.048（2）°, Mr = 422.73, V = 1838.2（4）°A^3, Z = 4, Dc = 1.528 g/cm^3, μ= 1.368 mm^-1, F（000） = 868, the final R = 0.0783 and wR = 0.1469 （w =1/[σ^2（Fo^2）＋（0.0351P）^2＋ 8.0014P], where P = （Fo^2 ＋ 2Fc^2）/3） based on 2025 observed reflections with I〉 2σ（I）; and those for compound 2： monoclinic, space group C2/c, a = 29.921 （7）, b = 8.5400（17）, c = 15.320（3） °A,β= 99.59（3）°, Mr = 487.75, V = 3859.9（14） °A^3, Z = 8, Dc = 1.668 g/cm^3, μ= 1.169 mm^-1, F（000） = 1936, the final R = 0.0723 and wR = 0.1612 （w = 1/[σ^2（Fo^2）＋（0.0681P）^2 ＋ 55.9577P], where P = （Fo^2 ＋ 2Fc^2）/3） based on 2130 observed reflections with I〉 2σ（I）. Fluorescent analyses show that both complexes exhibit intense blue luminescence （λmax = 485 nm for 1 and 475 nm for 2） upon excitation at 330 nm.

关键词： zinc(Ⅱ) cadmium(Ⅱ) crystal structure,coordination polymer fluorescence

Cadmium(II)-1,4-phenylenediacetate Complex with Green Luminescence

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Chinese Journal of Structural Chemistry 2006年第6期25卷 704-708页

作者： XU Yan-Qing ZHOU You-fu YUAN Da-Qiang HONG mao-chun State Key Laboratory of Structural Chemistry Fujian Institute of Research on theStructure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

The title complex, formulated as {[Cd（pda）（phen）]·3H2O}, 1 （pda = 1,4-phenylenediacetate, phen = 1,10′-phenanthroline）, has been hydrothermally synthesized and determimned by X-ray crystallography. Crystallographic data： triclinic, space group P1^-, a = 10.375 （7）, b = 10.435（1）, c = 12.040（1） A.α = 68.503（1）, ,β= 86.371（1）, γ= 66.231（1）°, Mr = 538.82, V = 1104.5（8） ,A^3, Z = 2, Dc = 1.620 g/cm^3,μ = 1.035 mm^-1, F（000） = 544, the final R = 0.0380 and wR = 0.0985 （w = 1/[σ^2（F0^2）＋（0.0559P）^2 ＋ 1.5319P], where P = （F0^2＋ 2Fc^2）/3） based on 3444 observed reflections with I 〉2σ（I）. Complex 1 features a two-dimensional layer. Fluorescent analysis reveals that it exhibits intense green luminescence with the maximum at around 516 nm.

关键词： cadmium(Cadmium(Ⅱ)-1,4-phenylenediacetate Complex with Green Luminescence) crystal structure coordination polymer fluorescence

Postharvest Quality and Physiological Behavior of Sweet Potato (Ipomoea batatas Lam.) Leaf Stalks Under Three Temperatures

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Agricultural Sciences in China 2009年第2期8卷 244-248页

作者： PENG Yan XU Yong-quan DUAN Dao-fu mao Lin-chun Department of Food Science and Nutrition College of Biosystem Engineering and Food Science Zhejiang University Hangzhou 310029 P.R.China Tea Research Institute Chinese Academy of Agricultural Sciences Hangzhou 310008 P.R.China Maize Research Institute Zhejiang Academy of Agricultural Sciences Dongyang 322100 P.R.China

Sweet potato （Ipomoea batatas Lam.） leaf stalks were cut into 20 cm length, and stored at 20, 6, and 2℃. The respiration rate, ethylene production, ascorbic acid, free amino acid, total chlorophyll content, freshness, and shelf life were determined during storage to investigate the effect of storage temperatures on the quality and physiological responses in sweet potato leaf stalks. Wound responses were observed as high respiration rate and ethylene production immediately after cutting. Sweet potato leaf stalks were found to be sensitive to chilling injury manifested as browning and water-soaking on the surface at 2℃. In contrast, sweet potato leaf stalks were susceptible to senescence, exhibited by etiolating and yellowing, at 20℃. Loss in weight and chlorophyll was minimized under low temperatures. High temperatures also caused the accumulation of amino acids with a significant loss of ascorbic acid and chlorophyll. Sweet potato leaf stalks had a storage life of 16 days at 6℃, 8 days at 2℃, and 6 days at 20℃, respectively.

关键词： sweet potato leaf stalks storage quality

NONLINEAR TRANSIENT RESPONSE OF fuNCTIONALLY GRADED SHALLOW SPHERICAL SHELLS SUBJECTED TO MECHANICAL LOAD AND UNSTEADY TEMPERATURE FIELD

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Acta Mechanica Solida Sinica 2014年第5期27卷 496-508页

作者： Yiming fu Sumin Hu Yiqi mao College of Mechanical and Vehicle Engineering Hunan University

This paper is concerned with the transient deformation of functionally graded （FG） shallow spherical shells subjected to time-dependent thermomechanical load. Based on Timoshenko- Mindlin hypothesis and yon Karman nonlinear theory, a set of nonlinear governing equations of motion for FG shallow spherical shells in regard to transverse shear deformation and all the inertia terms are established using Hamilton＇s principle. The collocation point method and Newmark- beta scheme in conjunction with the finite difference method are adopted to solve the governing equations of motion and the unsteady heat conduction equation numerically. In the numerical examples, the transient deflection and stresses of FG shallow spherical shells with various material properties under different loading conditions are presented.

关键词： functionally graded materials unsteady temperature field transient deflection andstresses

CONVERGENCE ANALYSIS OF MORLEY ELEMENT ON ANISOTROPIC MESHES

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Journal of Computational Mathematics 2006年第2期24卷 169-180页

作者： Shi-peng mao Shao-chun Chen ICMSEC Academy of Mathematics and System Sciences Chinese Academy of Sciences Beijing 100080 China Department of Mathematics Zhengzhou University Zhengzhou 450052 China

The main aim of this paper is to study tile convergence of a nonconforming triangular plate element-Morley element under anisotropic meshes. By a novel approach, an explicit bound for the interpolation error is derived for arbitrary triangular meshes （which even need not satisfy the maximal angle condition and the coordinate system condition ）, the optimal consistency error is obtained for a family of anisotropically graded finite element meshes.

关键词： Anisotropic meshes Interpolation error Consistency error Morley element.

further evidence for paternal DNA transmission in gynogenetic grass carp

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Science China(Life Sciences) 2020年第9期63卷 1287-1296页

作者： Zhuangwen mao Yeqing fu Shi Wang Yude Wang Kaikun Luo chun Zhang Min Tao Shaojun Liu State Key Laboratory of Developmental Biology of Freshwater Fish Hunan Normal UniversityChangsha 410081China College of Life Sciences Hunan Normal UniversityChangsha 410081China College of Chemistry and Chemical Engineering Hunan Normal UniversityChangsha 410081China

Gynogenesis is an important breeding method in aquaculture and has been widely applied to many fish *** gynogenetic progenies are to inherit paternal partial genomic DNA,this will increase genetic variation and will provide a useful outcome for *** this study,we investigated the genetic variation in homeobox(Hox)gene clusters(Hox A4 a,Hox A9 a,Hox A11 b,Hox B1 b,Hox C4 a,Hox C6 b,and Hox D10 a)among koi carp(Cyprinus carpio haematopterus,KOC;the stimulation sperm source),grass carp(Ctenopharyngodon idellus),and gynogenetic grass carp(GGC).We found paternal DNA(a special DNA fragment and Hox C6 b)derived from KOC and a recombinant gene belonging to Hox C6 b in *** are the first to report the recombinant Hox C6 b in *** study provides further evidence for paternal DNA transmission to gynogenetic progenies,which is a finding with great significance for the genetic breeding of fish.

关键词： Ctenopharyngodon idellus Cyprinus carpio haematopterus gynogenesis Hox genes DNA fragment recombinant gene

Facile Control of Molecular Weight Distribution via Droplet-Flow Light-Driven Reversible-Deactivation Radical Polymerization

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Chinese Journal of Chemistry 2022年第19期40卷 2305-2312页

作者： Yang Zhou Yangkang fu mao Chen Department of Macromolecular Science State Key Laboratory of Molecular Engineering of PolymersFudan UniversityShanghai200438 China

Molecular weight distribution(MWD)is fundamental for polymer analysis,which influences many important properties of polymeric *** this work,we demonstrate the development of a computer-aided droplet-flow system that combines photo-mediated reversible-deactivation radical polymerization(RDRP)and chain transfer agent(CTA)diffusion strategy to enable facile MWD control for the first *** advantages of this photo-flow polymerization allow controlled chain-growth to yield a variety of polymers of tunable MWDs in a broad range(Ð≈1.1—1.9)with predetermined molecular weights(Mn≈4—30 kDa)and good chain-end ***,the computer-aided platform has streamlined an automatic and high-throughput pathway to prepare polymer libraries of tunable *** copolymers,chemical compositions could be readily regulated besides MWDs with the droplet-flow *** believe that this work should be attractive for polymer engineering,and informative to create more flow polymerization techniques toward on-demand control of diverse polymer characters.

关键词： Photocatalysis Copolymerization Synthetic methods Molecular weight distribution Flow chemistry

Evolution of copper species during heat treatment and its effect on CO oxidation reaction on CuCeZrO_(y) catalyst synthesized by a facile solvent-free route

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Journal of Rare Earths 2024年第4期42卷 660-667页

作者： Guangying fu Dongsen mao Jun Yu Qiangsheng Guo School of Chemical and Environmental Engineering Shanghai Institute of TechnologyShanghai21418 China The ZeoMat Group Qingdao Institute of Bioenergy and Bioprocess TechnologyCASQingdao26611China

Several ternary oxides CuCeZrO_(y)(CCZ)were synthesized by a facile grinding method followed by calcination at high temperatures,and used as catalysts for CO oxidation at low *** influences of calcination temperature(400-600℃)on the physicochemical properties of the assynthesized ternary oxides were investigated by thermogravimetric analysis/differential scanning calorimetry(TGA/DSC),X-ray diffraction(XRD),transmission electron microscopy(TEM),Raman,inductively coupled plasma-optical emission spectrometry(ICP-OES),N_(2) adsorption,H_(2)-temperature programmed reduction(H_(2)-TPR),and X-ray photoelectron spectroscopy(XPS)*** results show that the increase in calcination temperature from 400 to 500℃is conducive to the high dispersion of CuOx on catalyst surface and the incorporation of Cu species into the support to form the Cu-Ce-Zr-O solid *** raising of calcination temperature from 500 to 600℃,however,leads to the segregation of Cu species from the solid solution to aggregate on support surface and growth of highly dispersed CuOx *** highest catalytic activity is acquired over the CCZ calcined at 500℃,which can be ascribed to the largest contents of Cu+species and oxygen vacancies owing to the formation of the maximum amount of Cu-Ce-Zr-O solid solution.

关键词： CuCeZrO_(y)catalyst co oxidation Calcination temperature Grinding method Oxalate precursor Rare earths