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Ab Initio Study on the Reaction of La￣+ + CH_4→La+-CH￣2 + H_2

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Chinese Chemical Letters 1996年第11期7卷 1043-1046页

作者： Zhu, RS Dai, ss YUNNAN UNIV DEPT CHEMKUNMING 650091PEOPLES R CHINA

Ab initio study on the reaction or the ground state (a3F) and excited state (a1D) or La+with methane has been Performed. performed. channel on the singlet and triplet potential energysurface (PES) has been examined and the reaction mechanism are discussed. Comparisons betweensinglet and triplet PEss show that the ex￣ state (aiD) of La+ is more r￣ than its groundstate (a3F) due tO the SPin quantum number conservation with the more stable insertion intermediate for excited state (1D), which is in good agreement with the experiment.

关键词： CH~2 Ab Initio Study on the Reaction of La H2

Difference in response of chlorophyll fluorescence parameters to strong light between wheat and soybean leaves

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Chinese Science Bulletin 1997年第8期42卷 684-689页

作者： Hong, ss Xu, DQ Shanghai Institute of Plant Physiology Chinese Academy of Sciences Shanghai China

UPPER leaves of higher plants are often exposed to strong sunlight around noon on clear days,

关键词： chlorophyll fluorescence xanthophyll cycle reversible inactivation of PS Ⅱ reaction centers wheat soybean.

toxicity assessment and screening of tetrodotoxin in the oblong blowfish(takifugu oblongus)from the tamil Nadu Coast of Bay of Bengal,India

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Asian Pacific Journal of tropical Medicine 2017年第3期10卷 263-268页

作者： Indumathi SM Khora ss Department of Integrative Biology School of Biosciences and TechnologyVIT UniversityVellore-632014Tamil NaduIndia

Objective:to assess the toxicity of the pufferfish takifugu oblongus,from Chennai coast,tamil Nadu,India and to detect the presence of tetrodotoxin(ttX).Methods:the toxicity was evaluated by mouse bioassay using Swiss Albino mice which were expressed in mouse units(MU).Gross anatomical features were observed which is followed by histopathology of the dead mice tissues to establish the *** analysis for the presence of tetrodotoxin was also performed through GC-MS and ***:the toxicity of ovary was the maximum with 163 MU/g and lowest toxicity was observed in skin with 75.88 MU/*** analyses of the dead mice showed various cellular degenerations and *** amount of tetrodotoxin detected through GC-MS and HPLC was more reliable and sensitive than the customary mouse bioassay as instrumental analyses were able to detect even nanograms of the ***:the present study evidently proved that takifugu oblongus is highly toxic and consumption of the same can pose serious threat for health and possible lethality to humans.

关键词： Food intoxications takifugu oblongus Mouse bioassay tetrodo toxin GC-MS HPLC

Comparison of the Kobayashi-Royden and Sibony metrics on ring domains

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Science China Mathematics 2009年第12期52卷 2610-2616页

作者： FORN■ss John Erik Department of Mathematics University of MichiganAnn ArborMichigan 48109USA

In this paper we show that the Kobayashi-Royden metric and the Sibony metric are different on ring domains,i.e.,the difference of two concentric balls,in higher dimension.

关键词： Kobayashi-Royden metric Sibony metric ring domain 32F45 32U05

RELAtIONS BEtWEEN tWO SEtS OF FUNCtIONS DEFINEDBY tHE tWO INtERRELAtED ONE-SIDE LIPSCHItZCONDItIONS

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Journal of Computational Mathematics 1999年第5期17卷 457-462页

作者： Zhao, ss Wang, CY Zhang, GF Lanzhou Univ Dept Math Lanzhou 730000 Peoples R China Dept Commun Commun Ctr Lanzhou 730030 Gansu Province Peoples R China

In the theoretical study of numerical solution of stiff ODEs, it usually assumes that the righthand function f(y) satisfy one-side Lipschitz condition less than or equal to v(1)parallel to y - z parallel to(2),f : Omega subset of or equal to C-m --> C-m, or another related one-side Lipschitz condition [F(Y) - F(Z), Y - Z](D) less than or equal to v'parallel to Y - Z parallel to(D)(2), F : Omega(s) subset of or equal to C-ms --> C-ms, this paper demonstrates that the difference of the two sets of all functions satisfying the above two conditions respectively is at most that v' - v' only is constant independent of stiffness of function f.

关键词： stiff ODEs one-side Lipschitz condition logarithmic norm

A minimization problem associated with gap phenomenon

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Chinese Science Bulletin 1997年第13期42卷 1073-1076页

作者： Shen, Yt Yan, ss Department of Applied Mathematics South China University of Technology Guangzhou 510641 China

In this note, we consider （2） assuming that f satisfies the following conditions（f1） and（f2）. We will develop a method entirely different from that in ref. [2] to prove that for anyweak solution of the Euler equation of （2）, we have Sing（f） Sing（u）, where Sing（u） isthe singular set of u. As a direct corollary of this result, （2） is not achieved. We assume that f∈H1（Ω, S2） satisfies the following conditions:

关键词： approximation elliptic system harmonic map.

A NOVEL REACtION BEtWEEN Ge-Ge AND Fe-Fe BONDS IN COMPLEX (Me_2GeGeMe_2)[(η￣5 - C_5H_4) Fe(CO)]_2(μ- CO)_2 AND CRYStAL StRUCtURE OF tHE PRODUCt

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Chinese Chemical Letters 1996年第4期7卷 385-386页

作者： Zhou, XZ Xie, WH Xu, ss NANKAI UNIV DEPT CHEMTIANJIN 300071PEOPLES R CHINA

Me2GeGeMe2)[(η￣5-C_5H_4)Fe(CO)]_2(μ-CO)_2, 1 undergoes a novel reaction between its Ge-Ge and Fe-Fe bonds, forming a rearrangement product with a new cyclic structure,[Me_2Ge(η￣5- C_5H_4)Fe(CO)_2]_2, 2, which was...

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Development of a database for the prediction of phases in Pt-based Superalloys:Cr-Pt-Ru

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Rare Metals 2006年第5期25卷 597-607页

作者： A.Watson L.A.Cornish R.Süss Institute for Materials Research School of ProcessMaterials and Environmental EngineeringUniversity of LeedsLeedsUK Advanced Materials Division MintekPrivate Bag X3015Randburg2125South AfricaDST/NRF Centre of Excellence for Strong MaterialsUniversity of the WitwatersrandJohannesburg2025South Africa Advanced Materials Division MintekPrivate Bag X3015Randburg2125South AfricaDST/NRF Centre of Excellence for Strong MaterialsUniversity of the WitwatersrandJohannesburg2025South Africa School of Chemical and Metallurgical EngineeringUniversity of the WitwatersrandJohannesburg2025South Africa

Work has been ongoing in building a thermodynamic database for the prediction of phase equilibria in Pt-based superalloys. the alloys are being developed for high texture applications in aggressive environments. the database will aid the design of alloys by enabling the calculation of the composition and proportions of phases present in alloys of different compositions. In order to extend this database, a preliminary assessment of the Cr-Pt-Ru system has been undertaken, using a combination of Pandat and MtDAtA software. As a first step, it was necessary to provide thermodynamic models for the three associated binary systems. Owing to a lack of thermodynamic information for these systems, the binary assessments were based on phase diagrams available in the literature. Using recent experimental phase equilibria data for the ternary system, a preliminary assessment of the Cr-Pt-Ru system has been produced. In this preliminary assessment, simplified models were employed for the L12 and sigma phases with a view to extending the descriptions as new experimental information becomes available.

关键词： Cr-Pt-Rh thermodynamics assessment phase diagram

Regioselective etherification of 1,2-O-isopropylidene-4,6-di-O-benzyl myo-inositol

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Chinese Journal of Chemistry 1996年第3期14卷 271-278页

作者： Yuan, CY Zhai, HX Li, ss ACAD SINICA SHANGHAI INST ORGAN CHEMSHANGHAI 200032PEOPLES R CHINA

During the etherification of 1,2-O-isopropylidene-4,6-di-O-benzyl myo-inositol, the specific regioselectivity on 3- or 8-hydroxyl group was showed to be determined by the nature of the O-alkylating agents used. As demonstrated by MM and MNDO calculation, the regioselectivity of the reaction mentioned can be rationalized by steric and/or electronic effect.

关键词： regioselective etherification myo-inositol MM and MNDO calculation