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Arginine bi-directional translocation and breakdown into ornithine along the arbuscular mycorrhizal mycelium

Science China(Life Sciences) 2009年第4期52卷 381-389页

作者： JIN HaiRu College of Chemistry and Life Sciences, zhejiang normal University, Jinhua 32.004, China College of Chemistry and Life Sciences Zhejiang Normal University Jinhua 321004 China

Bi-directional translocation and degradation of Arginine (Arg) along the arbuscular mycorrhizal (AM) fungal mycelium were testified through 15N and/or 13C isotopic labeling. In vitro mycorrhizas of Glomus intraradices and Ri T-DNA-transformed carrot roots were grown in dual compartment Petri dishes. [15N- and/or13C]Arg was supplied to either the fungal compartment or the mycorrhizal compartment or separate dishes containing the uncolonized roots. The levels and labeling of free amino acids (AAs) in the mycorrhizal roots and in the extraradical mycelia(ERM) were measured by gas chromatogra- phy/mass spectrometry (GC-MS) and high-performance liquid chromatography (HPLC). The ERM of AM fungi exposed in either NH4+ or urea as sole external nitrogen source had much higher 15N enrichment of Arg, compared with those in nitrate or exogenous Arg; however, glycerol supplied as an external car- bon source to the ERM had no significant effect on the level of Arg in the ERM. Meanwhile, Arg bio- synthesized in the ERM could be translocated intact to the mycorrhizal roots and thereby the level of Arg in the mycorrhizal roots increased to about 2.% after culture of ERM in 4 mmol/L NH4+ for 6 weeks. Also Arg was found to be bi-directionally transported along the AM fungal mycelium through [U-13C]Arg labeling either in the mycorrhizal compartment or in the fungal compartment. Once Arg was translo- cated to the potential N-limited sites, it would be further degraded into ornithine (Orn) and urea since either [U-13C] or [U-15N/U-13C]Orn was apparently shown up in the mycorrhizal root tissues when [U-13C] or [U-15N/U-13C]Arg was labeled in the fungal compartment, respectively. Evidently Orn formation indi- cated the ongoing activities of Arg translocation and degradation through the urea cycle in AM fungal mycelium.

关键词： arbuscular mycorrhiza arginine in vitro culture 15N labeling ornithine urea cycle

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CODIMENSION 3 BIFURCATIONS OFHOMOCLINIC ORBITS WITH ORBITFLIPS AND INCLINATION FLIPS

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Chinese Annals of Mathematics,Series B 2004年第4期25卷 555-566页

作者： SHUISHULIANG ZHUDEMING CollegeofMathematicsandPhysics ZhejiangNormalUniversityJinhua321004ZhejiangChina. DepartmentofMathematics EastChinaNormalUniversityShanghai200062China.

The homoclinic bifurcations in four dimensional vector fields are investigated by setting up a local coordinates near the homoclinic orbit. This homoclinic orbit is nonprincipal in the meanings that its positive semi-orbit takes orbit flip and its unstable foliation takes inclination flip. The existence, nonexistence, uniqueness and coexistence of the 1-homoclinic orbit and the 1-periodic orbit are studied. The existence of the twofold periodic orbit and three-fold periodic orbit are also obtained.

关键词： Bifurcation Homoclinic orbit Orbit flip Inclination flip Periodic orbit

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The maximal super-singular integral operators on product spaces

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Science China Mathematics 2011年第12期54卷 2615-2626页

作者： WANG Hui1 & CHEN JieCheng2.3, 1Department of Mathematics, Xidian University, Xi’an 710071, China 2.epartment of Mathematics, zhejiang normal University, Jinhua 32.004, China 3Department of Mathematics, zhejiang University, Hangzhou 31002., China 1. Department of Mathematics Xidian University Xi’an 710071 China2. Department of Mathematics Zhejiang Normal University Jinhua 321004 China3. Department of Mathematics Zhejiang University Hangzhou 310027 China

We study the maximal super-singular integral operator T＊Ω,α,β（f）（x,y）=sup ∈1〉0,∈2.0｜∫｜u｜〉ε1,｜v｜〉ε2.b1（｜u｜）b2.｜u｜）Ω（u＇,u＇）/｜u｜^n＋α｜u｜^m＋β-f（x-u,y-u）dudu｜defined on all f ∈ S（R^n ×R^m）, where 0 ≤ α,β〈∞, b1 b2.∈ L∞（R＋1 ）,Ω satisfies certain cancellation conditions and Ω∈L1（S^n-1×S^m-1）in the case α,β〉0;Ω∈L（log＋L）（S^n-1×S^m-1）in the case αβ=0 and α＋β 〉0. It is proved that, for 1〈p〈∞.T＊Ω,α,βis a bounded operator from the homogeneous Sobolev space Lα,β^p（R^n×R^m）to the Lebesgue space L^p（R^n×R^m）.

关键词： super-singular integral maximal operator product spaces

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New multisoliton solutions of the(2.1)-dimensional dispersive long wave equations

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Communications in Nonlinear Science and Numerical Simulation 2001年第3期6卷 178-182页

作者： Jiefang ZHANG and Ping HAN Institute of Nonlinear Physics, zhejiang normal University, Jinhua 32.004, China College of Engineering, zhejiang Ocean University, Zhoushan 316004, China Institute of Nonlinear Physics Zhejiang Normal University Jinhua 321004 China College of Engineering Zhejiang Ocean University Zhoushan 316004 China

Using the extension homogeneous balance method, we have obtained a nonlinear transformation to simplify the (2.1)-dimensional dispersive long wave equations into a linear partial differential equation, and found some ... 详细信息

关键词： multisoliton (2.1)-dimensions dispersive long wave equations

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Codimension 3 nonresonant bifurcations of homoclinic orbits with two inclination flips

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Science China Mathematics 2005年第2期48卷 248-260页

作者： SHUI Shuliang & ZHU Deming College of Mathematics and Physics, zhejiang normal University, Jinhua 32.004, China Department of Mathematics, East China normal University, Shanghai 2.0062. China 1. College of Mathematics and Physics Zhejiang Normal University 321004 Jinhua China 2. Department of Mathematics East China Normal University 200062 Shanghai China

Homoclinic bifurcations in four-dimensional vector fields are investigated by setting up a local coordinate near a homoclinic orbit. This homoclinic orbit is principal but its stable and unstable foliations take inclination flip. The existence, nonexistence, and uniqueness of the 1-homoclinic orbit and 1-periodic orbit are studied. The existence of the two-fold 1-periodic orbit and three-fold 1 -periodic orbit are also obtained. It is indicated that the number of periodic orbits bifurcated from this kind of homoclinic orbits depends heavily on the strength of the inclination flip.

关键词： bifurcation, homoclinic orbit, non-resonance, inclination flip, 1-periodic orbit.

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Nonlinear properties of fractal growth of thin films at low temperature

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Communications in Nonlinear Science and Numerical Simulation 2001年第2期6卷 61-67页

作者： Fengmin WU, Jiefang ZHANG, Gen BIAN and Ziqin WU Research Center of Science, zhejiang University of Technology, Hangzhou 310014, China Institute of Nonlinear Physics, zhejiang {2. University, Jinhua 32.004, China Shao Yifu Hospital of zhejiang Provin Research Center of Science Zhejiang University of Technology Hangzhou 310014 China Institute of Nonlinear Physics Zhejiang Normal University Jinhua 321004 China Shao Yifu Hospital of zhejiang Province Hangzhou 310005 China Department of Astronomy and Applied Physics University of Science and Technology of China Hefei 230026 China

Fractal growth of thin films at low temperature (75-2.0 K) is simulated by kinetic Monte Carlo method, using realistic growth model-Ag on Pt(111) surface and physical parameters. It is shown that the fractal growth of thin films is nonlinear, i. e., the island size S(t) grows with time t as tk ) where the growth exponent k is slightly less than 1 because of the growth competition of islands and the competition between nucleation and growth of islands. The further results indicate that the branch width of islands b increases with increasing island size S as b -Sa, where a is approximately equal to 1/3 because of the geometrical structure of the triangular substrate.

关键词： fractal growth thin film Monte Carlo method

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Synthesis and Structure of Bis(indene-1,2.3-trione 2.oximato)bis(aqua)Mn(Ⅱ): Mn(C_9H_4NO_3)_2.H_2.)_2

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Chinese Journal of Structural Chemistry 2003年第2期22卷 133-136页

作者： FENG Yun-Long① (Institute of Physical Chemistry, zhejiang normal University, Jinhua 32.004, China Department of Chemistry, zhejiang normal University, Jinhua 32.004, China) Institute of Physical Chemistry Zhejiang Normal University Jinhua 321004

The title complex, bis(indene-1,2.3-trione 2.oximato)bis(aqua)Mn(Ⅱ), crystallizes in the monoclinic system, space group P2./c with a = 5.2.1(1), b = 16.547(3), c = 9.914(2. ? ?= 100.30(3), V = 839.4(3) 3, Dc = 1.738 g/cm3, F(000) = 446, C18H12.2.8Mn, Mr = 439.2., m(MoKa) = 0.842.mm-1, Z = 2. the final R = 0.02.8 and wR = 0.0782.for 1762.observed reflections (I ≥ 2.(I)). The geometry around Mn(Ⅱ) is a distorted octahedral configuration with the basal plane consisting of two oximo-oxygen and two carbonyl-oxygen atoms from ligand indene-1,2.3-trione 2.oximato, while the axial coordination sites are occupied by two water- oxygen atoms. A plane network is formed by the intermolecular hydrogen bonds. The title complex is the first example of metal complex containing ligand indene-1,2.3-trione 2.oxime.

关键词： manganese(Ⅱ) complex ketoxime indene-1 2 3-trione 2.oxime crystal structure

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Survivability Specification Framework for Dependability-Functionality Codesign of ERTS

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Wuhan University Journal of Natural Sciences 2005年第1期10卷 75-78页

作者： JINYong-xian InstituteofComputerScience ZhejiangNormalUniversityJinhua321004ZhejiangChina

In ordet to maintain the dependability of system and meet the functional needof users dtsire, this paper introduces a survivability mechanism into embedded real-time system,and proposes a general comprehensive, approach based on a rigorous definition of survivability. Thisapproach permits a trade-off between the function and the cost of system development. It emphasizesthe ultradependable implementation of crucial function without demanding that of entire system.

关键词： ERIS (embedded real-time systems) dependability-functionality codesign survivability specification

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Some Endpoint Estimates for the Multiplier Operator

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Journal of Mathematical Research with Applications 2012年第3期32卷 337-345页

作者： Xiaoli CHEN 1,2.1.Department of Mathematics,Jiangxi normal University,Jiangxi 33002.,P.R.China 2.Department of Mathematics,zhejiang University,zhejiang 31002.,P.R.China Department of Mathematics Jiangxi Normal University Jiangxi 330022

In this paper,the author proves that Multiplier operator is bounded on BMO（R~n）,LMO（R~n） and CBMOρ,λ（R~n）respectively if some concellation conditions are satisfied.

关键词： multiplier operator BMO space LMO space λ-central BMO space.

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Preparation and electrochemical properties of urchin-like α-Fe_2._3 nanomaterials

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Science China(Technological Sciences) 2010年第7期53卷 1897-1903页

作者： TONG GuoXiu1,2. GUAN JianGuo2. WU WenHua1, LI LiangChao1, GUAN Yao2.& HUA Qiao1 1 College of Chemistry and Life Sciences, zhejiang normal University, Jinhua 32.004, China 2.State Key Laboratory of Advanced Technology for Materials Synthesis and Processing, Wuhan University of Technology, Wuhan 430070, China 1. College of Chemistry and Life Sciences Zhejiang Normal University Jinhua 321004 China2. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan 430070 China

Based on a facile glucose-guided hydrolyzing-heat-treating approach, urchin-like α-Fe2.3 nanomaterials with controllable morphology and crystallinity were prepared via adjusting the heat-treating temperature, and their electrochemical performances were investigated. The results showed that changing the heat-treating temperature can effectively control the structure and electrochemical property of the as-made products. The urchin-like α-Fe2.3 nanomaterials obtained by heat-treating at 300°C, composed of a mass of the shuttle fibrous brunches, had higher initial discharge capacity(1475 mAhg-1) than those consisting of nanorods formed at 700°C. The above difference is ascribed to the urchin-like samples obtained at the relatively low heat-treating temperature, which, with low crystallinity, large SBET, and well-regulated porous, is helpful to the adsorption of electrolyte and the transport of lithium ion, resulting in the high activity and discharge-charge capacity.

关键词： urchin-like nanomaterials hematite electrochemical performance glucose-guided hydrolyzing-heat-treating approach

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