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1.
Author Index Vol.13.2002 AISA H.A. (0515) AN T.Y. (0623) AN Y.L. (0448) BAI A.P. (0296) BAI D.L. (0023) BAI D.L. (0809) BAI J. (0351) BAI L. (0029) BAO G.H. (0237) BAO G.H. (0955) BAO J.K. (0223) BAO J.X. (0515) BEI J.Z. (0033) BI Z.M. (0535) BIE P.Y. (0167) BIE P.Y. (0830) BIE P.Y. (0935) BO T. (0269) BO T. (0877) BU H.T. (0456) CAI B. (0327) CAI B. (0851) CAI J.C. (0113) CAI J.C. (0201) CAI J.C. (0515) CAI J.C. (0818) CAI J.X. (0617) CAI M…  相似文献   

2.
ABLIZ Z. (0513) AI X.C. (0983) AISA H.A. (0883) AN J.Y. (0117) BA L. (1113) BAI A.P. (0775) BAI D.L. (0113) BAI D.L. (0403) BAI F.L. (0369) BAI Y.B. (0271) BAO J.X. (0883) BAO X.F. (0909) BAO X.F. (0967) BARRAULT J. (0823) BERNEKER A. (0211) BI W. (0965) CAI G.M. (0651) CAI J.C. (0883) CAI J.C. (0961) CAI M.Z. (0861) CAI Q.S. (0511) CAI R. (0835) CAI S.M. (0073) CAI T.X. (0125) CAI T.X. (0647) CAI Y. (0215) CAI Y. (1139) CAO A.C. (0021) C…  相似文献   

3.
ABLIZ Z. (0499) AKAO T. (1271) AN L. K. (0557) AN T. Y. (0489) ANTZUTKIN O. (0188) BAI H. X. (0290) BAI Q. (0294) BAI Q. (0824) BAO J. C. (1171) BAO L. J. (0503) BAO W. L. (0239) BAO W. L. (0993) BAO X. H. (0087) BAO X. P. (0115) BIE P. Y. (0441) BO Q. B. (0197) BOSTR諱 D. (0188) BU X. Z. (0557) CAI C. X. (1171) CAI G. L. (0094) CAI H. X. (1189) CAI Q. H. (0523) CAI R. X. (1163) CAI S. Q. (0720) CAI T. X. (0748) CAI W. …  相似文献   

4.
期刊名称 被引频次(名次 )影响因子(名次 )即年指标(名次 )基金论文比例(% ) (名次 )被引半衰期(年 ) (名次 )分析试验室 936 (3) 1.0 85(1) 0 .134(3) 2 4 .2 (2 4 ) 3.8(16 )分析化学 2 388(1) 1.0 0 3(2 ) 0 .171(1) 45.2 (15) 4.9(6 )色谱 4 90 (6 ) 0 .6 92 (3) 0 .0 4 2 (18) 36 .9(2 0 ) 3.1(2 1)分析测试学报 344(13) 0 .597(4 ) 0 .12 2 (5) 39.1(19) 3.0 (2 2 )环境化学 4 33(8) 0 .582 (5) 0 .114(7) 6 1.0 (10 ) 5.3(5)分析科学学报 12 7(18) 0 .4 73(6 ) 0 .0 36 (2 1) 0 (2 5) 2 .6 (2 3)高分子学报 36 1(11) 0 .4 4 1(7) 0 .…  相似文献   

5.
(据中国科技信息研究所《中国科技期刊引证报告》1 998年数据 )期刊名称 被引频次(名次 )影响因子(名次 )即年指标(名次 )基金论文比例( % ) (名次 )被引半衰期(年 ) (名次 )分析试验室 936( 3) 1 .0 85( 1 ) 0 .1 34( 3) 2 4 .2 ( 2 4 ) 3.8( 1 6)分析化学 2 388( 1 ) 1 .0 0 3( 2 ) 0 .1 71 ( 1 ) 45.2 ( 1 5) 4.9( 6)色谱 490 ( 6) 0 .692 ( 3) 0 .0 4 2 ( 1 8) 36.9( 2 0 ) 3.1 ( 2 1 )分析测试学报 344( 1 3) 0 .597( 4 ) 0 .1 2 2 ( 5) 39.1 ( 1 9) 3.0 ( 2 2 )环境化学 433( 8) 0 .582 ( 5) 0 .1 1 4( 7) 61 .0 ( 1 0 ) 5.3( 5)分析…  相似文献   

6.
CHINESE JOURNAL OF CHEMISTRY   总被引:1,自引:0,他引:1  
CHEN,Guang-Ju(陈光巨).…….1CHEN,Guo.Min(陈国明)……。.85CHEN,Li-Tao(陈丽涛)……….10CHEN,Qi(陈齐)……………..73CHEN,Yun.Sheng(陈运生)……54DENG,Cong-Hao(~从豪)…….19 FENG,Da-Cheng(~大诚)…….19 FENG,Shen奸Y11(冯圣玉)…….19 FU,Xiao.Yuan(傅孝愿)……….10 GUO,Zhi-Zheng(郭志筝)……..54 HAN。Yu.Zhen(韩玉真)=..…….54 HE,Jun-Ling(何军林)…….….63 HU,Qing-Mei(胡青眉)………..63 HU.Sheng-Zhi(胡盛志)……….47 HUANG,You,Qing(黄幼青)…..47 JIANG,Qing(蒋青)……………l K…  相似文献   

7.
Alkylationofphenolprovidesmanyindustrialintermediatessuchasagrochemicalsandpolymers.Thealkylationofphenolwithmethanolproceedsviaoxygen(O)-alkylationproducinganisole(An)aswellasmethylanisoleisomers(InAn)andring(C)-alkylationproducingmainlycresols(m.p.o-Cr)aswellasxylenols(Xy).Vapor-phasealkylationofphenolwithmethanolhasbeenexaminedovervarioussolidcatalysts'-'.Thecatalyticpropertiesandtheproductselectivityarestfonglyaffectedbythestructureofcatalystinadditiontoacidic-basiccharacter.Strongacidc…  相似文献   

8.
AAndrea Jeannette Lee 592BB.van de Graafl39BIAN Guo.Qing(卞国庆1 264BIAN Zhi.Guo(边治国)489BU Ping-Yu(卜平宇)13BU Xian.He(卜显和)277,60l,62ICCAI Jin.Wan(蔡金万)617CAI Jue.Xiao(蔡觉晓1 368CAI Yue.Peng(蔡跃鹏)378,683CAO Huan.Van(曹焕岩)241CAO Rong(曹荣)268,374,392CAO Zheng-Bai(曹正白)292,501CHAI Jian.Fang(柴建方)273CHEN Chang-Neng(陈昌能)1 6 1,206,256,643,64CHEN Chuang.Tian(陈创天)38CHEN Feng(陈锋)64,206,643CHEN Hong.Ji(陈宏基)260CHEN Jin.Xiang(陈金香)l 74CHE…  相似文献   

9.
Chromium(III)isanessentialtraceelement.Inanactiveform.chronlium(III)asacomponentofglucosetolerancefactor(GTF)canimproveinsulinbiologicalactivity.CrsupplementationinhumansandanimalsreducessymptomsofTypeIIdiabetesandhypoglycemia.Forabetterunderstandingofthenatureofbiologicallyactivechromium(ill)complex,manyGTFmodelcomplexeshavebeenstudiedpreviously'.Here,oneGTFmodelcomplexofN,N'-ethylenebis(salicylideneiminato)diaquochromium(ill)chloride,[Cr(salen)(H,O)=]CIwaspreparedandcharacterized.a…  相似文献   

10.
~The~andmagneti~Of~~areatoPicthahasndchinndinndnd.bondinthewiin-wtofbinudearCU(n)-Fe(u)-,chewedwiththe~alleq-nettrioftwnew~-,[CU(oxa)Fe(L)21sa(Lbo1,1o-~(Phen)nd5-nithe1'1o-~(NQ-Phen)),whereOxaisN,N'-bis(2-amhathy).edfor.-Synboor(1)ToCh(oxae)2(94.2mp'o.4ed)theindri(5nd)wasbo-lyadtalaedboofso.Wio(111.2mp,o.4nuno)inmeto(1ond)ndaboofPhen(144-2mp,o.8mrnO)inrne~(1OrnL)underN2atrmpe.theedfor2hthegreddebm~thuSfo~wereforoff,washededtimeswithrne~anddiethyletheranddriedoverP2QUnderededpe.ha:C,…  相似文献   

11.
The chemoselectivity in the intramolecular CH insertion of various diazosulfonamides has been experimentally studied. The results reveal that the aliphatic 1,4-, 1,5-, or 1,6-C(sp3)?H insertions of diazosulfonamides are not accessible, while the aromatic 1,5-C(sp2)?H insertion can be realized specifically by adjusting the diazo-adjacent group. In addition, the general chemoselectivities in the intramolecular CH insertions of diazosulfonyl compounds are summarized. Generally, diazosulfones undergo both aromatic 1,5-C(sp2)?H and aliphatic 1,5- and 1,6-C(sp3)?H insertions, while diazosulfonates undergo aliphatic 1,5- and 1,6-C(sp3)?H insertions. However, diazosulfonamides only undergo aromatic 1,5-C(sp2)?H insertion.  相似文献   

12.
The Langevin paramagnetic theory can’t describe the relation between magnetization of ferrofluids and applied magnetic field. The structuralization of ferrofluids, which is considered the main influence factor of the magnetization, is regarded. The part of magnetization works is deposited when the structure is forming. This action influences the magnetization of ferrofluids directly or indirectly. On the base of the “compressing” model, the Langevin function that usually describes the magnetization of ferrofluid is modified, and a well-fitted curve is obtained. An equation of the relation between the equivalent volume fraction after being “compressed” and the intensity of magnetic field is discovered, which approximately describes the process of magnetization. The relation between the approximate initial susceptibility and the volume fraction can be obtained from modified formula.  相似文献   

13.
A class of excitable media described by the Fitzhugh-Nagumo equation is investigated. Based on the stable and self adaptive theory, the error between the systems grid variables and the standard sampling of the periodical signal or constant signal was feed back into the system both globally and locally. When the controller was then shut off, automatically, the whole system became homogeneous. Additionally, the scheme was tested under noisy conditions. The numerical simulations results demonstrate its effectiveness. The system reached a homogeneous state and a spiral wave was converted into a target wave, resulting in a wonderful pattern emerging using a different controller. The scheme proved robust in resisting the effects of noise.  相似文献   

14.
AgCuSe nanorods were prepared at room temperature by a redox reaction. The as-prepared product was characterized by X-ray powder diffraction, transmission electron microscopy and X-ray photoelectron spectroscopy.X-ray powder diffraction shows that the as-prepared product is the tetragonal phase of AgCuSe. Transmission electron microscopy shows that the sample consists of nanorods with a diameter varying from 5 nm to 20 nm and a length varying from 200 nm to 600 nm. X-ray photoelectron spectroscopy shows that the purity of the sample is high. The formation mechanism of AgCuSe and the growth mechanism of AgCuSe nanorods were discussed.Thermodynamic calulations show that the final product in the synthetic system is pure AgCuSe. The solvent ethylenediamine did not only acts a didentate ligand to form relatively state Ag + and Cu + complexes, but also dissolved Se and enhanced the reactivity of Se. It played an important role in controlling the nucleation and growth of AgCuSe nanorods.  相似文献   

15.
The lithium-ion-conducting inorganic solid electrolytes in the oxide systems Li2O-SiO2-P2O5 and Li2O-TiO2-SiO2-P2O5 were prepared by the solid-state reaction, and the electrolyte pellet made by cold-pressing method had diameter of 13 mm and was about 1 mm thick. Phase identification and surface morphology of the products were carried out by X-ray diffraction and scanning electron microscopy. Ionic conductivity of the pellets was investigated through ac impedance. The results show that the adding of other cations can improve the ionic conductivity of the solid electrolyte, and the sintering temperature and duration can influence the ionic conductivity. The maximum ionic conductivity in the samples is 9.9 × 10−4 S/cm in the Li2O-TiO2-SiO2-P2O5 system. Original Russian Text ? W. Li, M. Wang, Z.H. Li, X.F. Shang, H. Wang, Y.W. Wang, Y.B. Xu, 2007, published in Elektrokhimiya, 2007, Vol. 43, No. 11, pp. 1341–1345.  相似文献   

16.
以α位(2,4-二特戊基)苯氧基邻苯二腈作为环合前体,制备了多种金属酞菁,产物经元素分析、紫外、红外、核磁氢谱等分析手段进行表征.并选择了部分酞菁进行溴化,其中着重研究了不同中心金属以及溴化对染料Q带吸收的影响.结果表明,酞菁染料的金属化对于其Q带吸收影响很大,多数染料金属化后会出现蓝移,而选择合适的条件进行溴化,可以使得金属酞菁的Q带吸收出现一定程度的红移,其中部分溴化金属酞菁的吸收波长与光信息产业中使用的近红外激光器很接近,具有潜在的实用价值.  相似文献   

17.
Monodisperse crosslinked poly(chloromethylstyrene-co-divinylbenzene) (poly(CMSt-co-DVB)) microspheres were prepared by distillation-precipitation copolymerization of chloromethylstyrene (CMSt) and divinylbenzene (DVB) in neat acetonitrile. The polymer particles had clean surfaces due to the absence of any added stabilizer. The size of the particles ranges from 2.59 μm to 3.19 μm and with mono-dispersity around 1.002-1.014. The effects of monomer feed in copolymerization on the microsphere formation were described. The polymer microspheres were characterized by SEM and chlorinity elemental analysis.  相似文献   

18.
用溶胶-凝胶法以磷钼酸(MPA)的镍盐溶液水解钛酸四丁酯制备了NiPMo/TiO2催化剂.使用ICP、 XRD、 TG-DTA、 IR、 TPD-MS和微反应技术研究了催化剂的化学组成、热稳定性、化学吸附性质和催化反应性能.杂多钼酸盐与TiO2通过O2-在TiO2表面发生了键合.在623 K下,杂多阴离子仍保持原有的Keggin结构.CO2在Lewis酸位Ni(Ⅱ)和Lewis碱位Ni-O-Mo的桥氧协同作用下生成CO2卧式吸附态Ni(Ⅱ)←O-(CO)←(O--Ni).丙烯有多种吸附态在催化剂上吸附.在563 K、 1 MPa和空速1500 h-1的反应条件下,丙烯的摩尔转化率为3.2%,产物MAA选择性为95%.  相似文献   

19.
Applying calculus to the horizontal and vertical unit hyperbolas we derive the obtuse exterior and the acute angle of parallelism formulas for the arc length of a unit circle. When the analogous arc length of a hyperbola is figured, we further define metric distance with radian measure. Employing a non-conventional velocity of light formula, we explain several aspects of physics with a logical geometry. The hyperbolic geometry Lobacevskii angle of parallelism is mathematically measured to agree with the physical measure, without using the gravitational constant, but rather the electromagnetic spectrum and geodesics. Space is hereby measured with units of radians and time. Half-angle formulas for slopes and boosts pertain to spinor algebra. The new light velocity is justified when its derivative results in Einstein's mass–energy formula. Relativity is reformulated with these half-angle formulas.  相似文献   

20.
Viscosity measurements have been made of water-solvent and water-polymer solutions in a temperature range of 20–60 centigrades. A medium structure temperatureT 0 was calculated from the Vogel-equation. Water has a structure temperature of 140–150 K, its decrease indicates structure breakage, an increase structure promotion. Pyridine, dioxane, dimethylformamide and urea are structure breakers. This is explained by a shift of the equilibrium — bonded water molecules — nonbonded — to the right. Acetone shows hydrophobic bonding in the same concentration range of 0–10 mole % as the normal alcohols. They are quasifree liquids-structure temperature zero-in the pure state. This is explained by hydrogen bridged dimer formation with the exception of tert-butanol. Its 3 methylgroups sterically prevent dimer formation and cause structuring. Adding urea to methanol-water solutions breaks water structure according to urea concentration but extends the hydrophobic bonding maximum over the whole diagram. Glucose-water solutions have a minimum in the structure temperature diagram. Its left side indicates waterstructure breakage, its right side formation of a new structure forced upon water by the sugar. The equilibrium can be formulated: Waterlike bonded-nonbonded-hetero (solvent)-like bonded, Ribose also shows this minimum but after a short range of heterobondedness the structure is completely broken to nonbondedness.The polymers dextrane and polyvinylpyrrolidone are strong waterstructure breakers. Dextrane much stronger than PVP, it breaks to nonbondedness while PVP maintains a certain structuring, perhaps indicating heterobonding at higher concentrations. Polyacrylamide is a strong structurebreaker. It resembles urea in this sense. Perhaps the solvationwater structure of the NH2 groups is very different from pure waterstructure. Polyacrylicacid breaks waterstructure completely, if sodiumchloride is added waterstructure is rebuilt again. The only waterstructure promoting polymer is natural gelatine. Perhaps this structure is different from pure water or the watermolecule equilibrium is shifted towards bondedness. The structure temperatures of pure polyethyleneglycoles show a minimum with increasing molecular weight. The high structure temperature of the small chains is explained by long chain assoziates formation through hydrogen bridging. This liquid of long assoziate chains is structured and has a high structure temperature. With increasing molecular weight ringformation instead of linear assoziation becomes possible. These neutral rings form a free liquid. Long chains again have a linear structure and the structure temperature increases at higher molecular weights. Existence of linear chain assoziation of low molecular PEGs is proved with their breakage by adding the chain terminating methanol.Dedicated to Prof. Dr. F. H. Müller.Herrn Chemotechniker D. Ziegler möchte ich für die sorgfältige Durchführung der Messungen sehr danken.Dem Verband der Chemischen Industrie danke ich sehr für die Ermöglichung der Arbeit.  相似文献   

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