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通过核独立化学位移(NICS)计算研究二价三、五、七元环C_2H_2m,C_4H_4m and C_6H_6m(m=C,Si,ge,Sn and Pb)的芳香族特性(英文)

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无机化学学报 2008年第4期24卷 631-635页

作者： Vessally E Nikoorazm m Ramazani A Tayame Noor University Zanjan Branch伊朗Zanjan Department of Chemistry University of Ilam伊朗Ilam Department of Chemistry Zanjan University伊朗Zanjan

The aromatic character of divalent three, five and seven-membered rings C2H2m, C4H4m and C6H6m(m=C, Si, ge, Sn and Pb) is investigated through magnetic and geometric criteria by Density Functional Theory (DFT )method using 6-311++g(3df,2p) basis set of the gAUSSIAN 98 program. The result of Nucleus-independent Chemical Shifts (NICS) (0.5) calculations show an aromatic character for singlet state of C2H2m(m=C, Si, ge, Sn and Sn) and nonaromatic character for triplet states of C2H2m(except m=ge and Pb). NICS (0.5) calculations show nonaromatic character for the singlet state of C4H4C and antiaromatic character for C4H4m(m=Si, ge, Sn and Pb). In contrast, NICS (0.5) calculations indicate antiaromatic character for the triplet state of C4H4C and nonaromatic character to C4H4m(m=Si, ge, Sn and Pb). NICS (0.5) calculations show a slightly homoaromatic character for the singlet state of C6H6m and anti-aromatic character for triplet state of C6H6m.

关键词：卡宾硅烯锗烯锡烯铅烯芳香特性 NICS计算

Synthesis of LiSm_(0.01)mn_(1.99)O_4 by molten salt technique

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Journal of Rare Earths 2010年第2期28卷 255-259页

作者： m Helan L John Berchmans Department of Chemistry Jamal Mohamed College (Autonomous) Electropyrometallurgy Division Central Electrochemical Research Institute

Samarium substituted lithium manganese oxide powders were successfully prepared by molten-salt synthesis(mSS) using eutectic mixture of LiCl,SmCl3.6H2O and mnO2 salt at 700 °*** synthesis was carried out in open *** crystalline powders were characterized for their phase identification using X-ray diffraction(XRD) *** physico-chemical properties of the samarium substituted lithium manganese oxide powders were investigated by thermal analysis(TgA/DTA),FT-IR spectroscopy,EDAX,electron par...

关键词： LiSm0.01mn1.99O4 molten salt synthesis cathode materials rare earth ion

SURAmIN ACTIVIY IN HUmAN HEAD AND NECK SQUAmOUS CELL CARCINOmA——Ⅱ.EFFECT OF SURAmIN ON HUmAN HEAD AND NECK CARCINOmA XENOgRAFTS AND RELATED TOXICITY AND PHARmACOKINETIC STUDIES IN NUDE mICE

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山东大学学报(医学版) 1992年第4期 343-348页

作者：李安太王天铎栾信庸姜玉芳 g.A.m.S.Van Dongen B.J.m.Braakhuis g.B.Snow Dept.of Otolaryngology Affiliated Hospital of Shandong medical University Dept.of Otolaryngology Affiliated Hospital of Shandong medical University Dept.of Otolaryngology Affiliated Hospital of Shandong medical University Dept.of Otolaryngology Affiliated Hospital of Shandong medical University Dept.of Otolaryngology/Head and Neck Surgery Free University Hospital Amsterdam The Netherlands Dept.of Otolaryngology/Head and Neck Surgery Free University Hospital Amsterdam The Netherlands Dept.of Otolaryngology/Head and Neck Surgery Free University Hospital Amsterdam The Netherlands

In part Ⅰ of the study,we have demonstrated that suraminhas a marked antiproliferative effect on human head and neck squamous cellcarcinoma cell lines,In the present study,both toxicity and pharmacokineticstudies in nude mice were *** treatment of nude mice bearing head andneck cancers with suramin showed that suramin had a minimal antitumor *** possible mechanism of suramin lacking antitumor effect is discussed.

关键词： Suramin Head and neck neoplasms Transplantation heterologous Toxicity study Pharmacokinetic study mice,nude

Adaptive Synchronization and Anti-Synchronization of a Chaotic Lorenz–Stenflo System with Fully Unknown Parameters

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Chinese Physics Letters 2013年第7期30卷 26-29页

作者： m.mossa Al-sawalha mathematics Department Faculty of ScienceUniversity of HailKingdom of Saudi Arabia

An adaptive control scheme is developed to study the synchronization and the anti-synchronization behaviors between two identical Lorenz–Stenflo systems with unknown *** adaptive controller is designed based on Lyapunov stability theory and an analytic expression of the controller with its adaptive laws of parameters is *** analysis and numerical simulations are shown to verify the results.

关键词： parameters. verify identical

Tb^(3+)substituted strontium hexaferrites:Structural,magnetic and optical investigation and cation distribution

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Journal of Rare Earths 2020年第4期38卷 402-410页

作者： m.A.Almessiere Y.Slimani H.gungunes m.Sertkol m.Nawaz N.A.Algarou A.Baykal I.Ercan Department of Biophysics Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityP.O.Box 198231441 DammamSaudi Arabia Department of Physics College of ScienceImam Abdulrahman Bin Faisal UniversityP.O.Box 198231441 DammamSaudi Arabia Department of Physics Hitit University19030Cevre Yolu Bulvari-CorumTurkey Deanship of Preparatory Year Imam Abdulrahman Bin Faisal UniversityP.O.Box 198231441 DammamSaudi Arabia Department of Nanomedicine Research Institute for Research and Medical Consultations(IRMC)Imam Abdulrahman Bin Faisal UniversityP.O.Box 198231441 DammamSaudi Arabia

In this study,SrFe12-xTbxO19(0.00≤x≤0.1)hexaferrites(HFs)were prepared successfully by citrate solgel approach.X-ray powder diffraction analyses affirm the hexagonal structure of *** phase starts to appear for x≥*** crystallites sizes were estimated to be in the range of 33-46 *** the products exhibit inhomogeneous distribution of grain size detected through *** analyses of magnetization versus applied magnetic field,m(H),were *** measurements were done at room(300 K;RT)and low(10 K)*** different magnetic parameters including saturation magnetization ms,remanence mr,squareness ratio(SQR=mr/ms),coercivity Hc,and magnetic moment nB are deduced and discussed in *** both considered temperatures,m(H)results show ferrimagnetic nature for all *** is shown that the Tb substitutions significantly affect m(H)data.A significant increase in the ms,mr,and nB is observed for x=0.02 *** SQR values are around 0.5 indicating the single domain nature with uniaxial *** obtained magnetic results were investigated deeply with relation to structural and microstructural *** spectroscopy results were also *** to mossbauer results,the Tb3+ions preferentially occupy 12 k and 4f2 sites.

关键词： m-type hexaferrites Structure mossbauer spectroscopy Optical properties magnetization Rare earths

THE BLOCH SPACE ON THE UNIT BALL OF A HILBERT SPACE: mAXImALITY AND mULTIPLIERS

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Acta mathematica Scientia 2021年第3期41卷 899-906页

作者： Pablo gALINDO mikael LINDSTRÖm Departamento de Análisis matemático Universidad de Valencia.C/Dr.Moliner 50.46.100BurjasotValenciaSpain Department of mathematics Abo Akademi University.FI-20500ÅboFinland

We prove that, as in the finite dimensional case, the space of Bloch functions on the unit ball of a Hilbert space contains, under very mild conditions, any semi-Banach space of analytic functions invariant under automorphisms. The multipliers for such Bloch space are characterized and some of their spectral properties are described.

关键词： Analytic functions on Hilbert space invariance under automorphisms multiplier

Changes in soil organic carbon,nitrogen and sulphur along a slope gradient in apple orchard soils of Kashmir Himalaya

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Journal of mountain Science 2021年第9期18卷 2377-2387页

作者： Javaid m DAD Lotfollah ABDOLLAHI Department of Botany University of KashmirHazratbalSrinagar(J&K)India Faculty of Agriculture Payame Noor UniversityTehranP.O.Box 19395-3697Iran

Accumulation and losses of soil organic carbon(SOC),total nitrogen(TN)and sulphur(S)influence food security and global ***,their spatial distribution and variability at regional scale,and their relation to topographical variables are of great *** this study,the variability of SOC,TN and S content was evaluated in apple orchard soils of Kashmir region,at three depths(D1:0-10,D2:10-20,and D3:20-30 cm)on slope gradient i.e.:flat,medium,and *** an increase in slope,a significant decrease of SOC and TN was observed,with concentration of SOC and TN recorded highest(14.3±2.06 g kg-1&0.97±0.35 g kg-1)in flat slope orchards and lowest(9.6±2.07 g kg-1&0.84±0.41 g kg-1)in high slope *** stock basis,the values recorded for flat,medium,and high slope orchards,for SOC and TN were 54.62±4.24 mg ha-1&0.38±0.06 mg ha-1,44.13±5.11 mg ha-1&0.32±0.09 mg ha-1,and 38.73±5.94 mg ha-1&0.28±0.10,*** differences for S concentration and stocks were modest,with flat(0.21±0.15 mg kg-1&0.09±0.0.003 mg ha-1)>high(0.16±0.07 mg kg-1&0.06±0.007 mg ha-1)>medium(0.12±0.04 mg kg-1&0.075±0.009 mg ha-1).Across slopes,SOC,TN and S decreased with increasing soil depth,suggesting clear downward ***,SOC and TN increased with the increase of altitude,precipitation and clay content while its relationship with soil acidity and soil bulk density was *** findings may provide scientific basis to structure agricultural development plans or prioritize regions for soil conservation efforts.

关键词： Apple orchards Slope Soil organic carbon Sulphur Total nitrogen Soil bulk density

Textural changes in metallurgical coke prepared with polyethylene

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International Journal of minerals,metallurgy and materials 2014年第10期21卷 969-973页

作者： Stanislav S.gornostayev Jyrki J.Heino Tommi m.T.Kokkonen Hannu T.makkonen Satu m.m.Huttunen Timo m.J.Fabritius Laboratory of Process metallurgy University of Oulu

The effect of high-density polyethylene （HDPE） on the textural features of experimental coke was investigated using polar- ized-light optical microscopy and wavelet-based image analysis. metallurgical coke samples were prepared in a laboratory-scale furnace with 2.5%, 5.0%, 7.5%, 10.0%, and 12.5% HDPE by mass, and one sample was prepared by 100% coal. The amounts and distribution of textures （isotropic, mosaic and banded） and por^s were obtained. The calculations reveal that the addition of HDPE results in a decrease of mosaic texture and an increase of isotropic texture. Ethylene formed from the decomposition of HDPE is considered as a probable reason for the texture modifications. The approach used in this study can be applied to indirect evaluation for the reactivity and strength of coke.

关键词： metallurgical coke texture image analysis polyethylene

Induction plasma spheroidization of tungsten and molybdenum powders

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中国有色金属学会会刊：英文版 2006年第1期16卷 13-17页

作者：蒋显亮 m.BOULOS Institute of Surface and Coatings Technology School of Materials Science and Engineering Central South University Changsha 410083 China Plasma Technology Research Center University of Sherbrooke Sherbrooke J1K 2R1 Canada

The melting, evaporation and oxidation behaviors as well as the solidification phenomena of tungsten and molybdenum in induction plasma were studied. Scanning electron microscopy was used to examine the morphology and the cross section of plasma-processed powders. X-ray diffraction was used to analyze the oxides formed on the particle surface of these two metals. The influence of spray chamber pressure on the spheroidization and oxidation phenomena was discussed. The results show that fewer mo particles than W particles are spheroidized at the same powder feed rate under the same plasma spray condition although molybdenum has a lower melting point. A small fraction of tungsten is evaporized and condensed either on the surface of tungsten particles nearby or on the wall of spray chamber. Tungsten oxides were found in tungsten powder processed under soft vacuum condition. Extremely large grains form inside some spheroidized particles of tungsten powder.

关键词：球化处理钨粉钼粉熔炼蒸发氧化等离子体冶金