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1.
《天然气化学杂志》2006,15(4):I0007-I0008
A G Abdullah,Zalizawati,247 Ah6n,Vfotor R.,307 Alavi,S.M.,327 Amin,Nor Aishah Saidina 191,259,340 Ammasi,Sriraj,191 An,G的jun,127 Anggoro,Didi Dwi,340 Ge,Zhonghua,164 Gu,Y.,73 Guo,Bo,223 Guo,Jianjun,52 Guo,Xiaohui,105 H B Bai,Liang,105 Bakar,W.Azelee W.Abu,259 Bao,Xinhe,181 Batuev,Lubsan,149 Burgina,Elena,149 Ha£axlioglu,P.,73 Han,Huajun,303 Hong,Kong Bee,266 Hu,Xiaofang,58 Hu,Xi加jun,100 Huang,Shengjun,93 Huang,Xingyun,3…  相似文献   

2.
用ICP研究鹿科动物骨质疏松症的微量元素特征   总被引:1,自引:0,他引:1  
鹿科动物的骨质疏松症是近几年出现的一种疾病,它影响鹿的生长发育和繁殖,病重者死亡。我们采集梅花鹿和白唇鹿的毛,血样,用低温灰化方法和温法消解处理样品,用ICP分析了毛,血清中微量元素的含量。病梅花鹿毛样中Mg,Al,Ca,Ti,Fe,Cu,Zn的含量比正常组高,Ti,Cu,Zn的偏差率大于15%,而Si,Mn,P,P,Ag,Ba,La,Ce,Pb比正常组低,V,Ag,Ba,La,Ce,Pb存在...  相似文献   

3.
用ICP-AES方法,对30例大肠癌,26例溃疡性结肠炎进行血清钼,锌,铬铁,铜,锰,铅,铝,硒,铋,钡,钛,钴,钒等微量元素测定,并与20例健康者对照。结果显示大肠癌组血清钼,锌,铬,低于对照组钼,锌,铬,P分别〈0.01,〈0.05,〈0.05;溃疡性结肠炎组钼低于对照组,P〈0.05。提示微量元素代谢异常可能直接影响酶系统,使自由基失控,体内促氧化和抗氧化平衡失调,促使肿瘤的发生。  相似文献   

4.
Akagi,Kazuo Amorn,P. Amoudaehe,S Anis,Arfat 265,353 139 229 449 Bai,Feng Bai,Ying Bai,Zheng一”Baloeh,Musa Kaleem Ballthia,A.K. Bao,Yong一zhong Bayraklx,Yasin Bourahla,B. 163 503,609 107 369 449 195 647 229 Cao,Jian一hua Cao,Shao一kui Cao,W亡n Che,Ai一fu Chen,Jin Chen,Jin一long Chen,Ling一wn Chen,Ling一wn Chen,Qing一yong Chen,Qun Chen,Shi Chen,W己n一xing Chen,Xiao找h们g Chen,Xiao一ming Cheng,Yi一xiang Ci,Yun一xiang 205 265 389 103 13,61,273…  相似文献   

5.
环酮的构象研究进展   总被引:1,自引:0,他引:1  
王明安  张宁  王道全 《有机化学》2003,23(7):619-627
综述了30多年来环酮(n=8,9,10,11,12,13,14,15,16)及对称的偶数 环二酮(n=8,10,12,14,16,18,20,22,24,26)的构象研究进展。  相似文献   

6.
利用火焰原子吸收法测定了中国银行韶关节市分行458名职工头发中Cu,Fe,Zn,Ca含量,运用统计学方法求出该人群中正常者与白发,脱发者Cu,Fe,ZnCa的特征含量,通过数据比较可看出,白发者Cu,Fe,Zn,Ca的含量均低于正常组,而脱发者与正常组较接近,经相关性检验,证明了Cu,Fe,Zn,Ca偏低的血发存在的相关性,与脱发没有相关性,经过性别比对,女性发中Cu,Fe,Zn,Ca含量均高于男  相似文献   

7.
营养合剂是由胎盘水解的复方氨基酸,中药当归,白术,黄芪的水提液,微量元素Fe,Zn,Cu,蜂蜜及甜菊甙等精制成的高级营养液,本文报道其制备,质控及临床应用,临床应用表明,本品对缺铁性和妊娠性贫血,异食癖,异食癖,顽固性厌食及孕妇小腿痉挛等疗效显著,治愈率分别为92.3%,90.0%,92.0%,93.3%,100%,有效率皆为100.0%,本品营养丰富,疗效可靠,毒副作用小,制备工艺简单,值得临床  相似文献   

8.
压电液相化学分析   总被引:10,自引:1,他引:10  
聂利华  姚守拙 《分析化学》1996,24(2):234-241
压电液相分析方法有吸附,电解沉积,频移滴定,化学频移,萃取频移,介电分析,内电解,选择性络合,催化,催化,化学倍增,氧瓶燃烧测频,多元混合物速测等法,可用于无机物,有机物,药物,环境,冶金,食品和饮料等分析。  相似文献   

9.
固体物理、固体化学与新材料424Tin'",YP"共掺ZBLAN玻璃中的能量传递与转换,冯衍等,物理学报,1997,46(12),2454.425LqO。基导电白瓷高祖电用率的国试和研究,李友芬等,中国有色金属学报,1997,7(l),159.4M环氧树脂粘结SIDZFq,N。磁体的矫顽力机理,于申军等,磁性材料及器件,1997,28(l),16.427SmZFq7Nyq稀土永巴材料的最近进展,吴安国,磁性材料及器件,1997,28(l),46.428重稀土锰基化合物Gd(回n,Co)St的结构与殓性,林钢等,磁性材料及器件,1997,28(2),19.4N制粉过程对SwFq,N。各向异性…  相似文献   

10.
一种全自动光度滴定仪   总被引:1,自引:0,他引:1  
汪敬武  魏琼雄 《分析化学》1998,26(7):904-908
报道了改装721型分光光度计为光度滴定仪并联用8031单片微机构成一台全自动光度滴定仪,在单片机的控制下,实现取样,加试液,搅拌,开关光门,调零,调参比,滴定,测吸光度,数据处理,显示结果并打印,排除废液,冲洗滴定池等操作过程的全自动化,约110s可完成一次测定,误差〈0.2%,RSD〈1.5%,测定快速,准确,重复性好,可胜任在线监测工作,也可作常规滴定分析。  相似文献   

11.
The review contains a concise historical account and information on the most significant researches undertaken by the staff at the A. E. Favorsky Irkutsk Institute of Chemistry, Siberian Branch of the Russian Academy of Sciences on the Chemistry of Heterocyclic Compounds. Dedicated to Academician of the Russian Academy of Sciences B. A. Trofimov on his 70th jubilee. Translated from Khimiya Geterotsiklicheskikh Soedinenii, No. 10, pp. 1443–1502, October, 2008.  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.
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   

14.
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   

15.
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   

16.
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   

17.
Trimethylsilylacetamide and trimethylsilyltrifluoroacetamide react with halogenodiorganylboranes to monomeric or dimeric amidoboranes depending on the organyl substituents. The compounds were characterized analytically and spectroscopically (NMR:1H,19F,11B; MS; IR).
21. Mitt.:A. Meller, W. Maringgele, K. Hennemuth undU. Sicker, J. Z. anorg. allg. Chem., im Druck.  相似文献   

18.
Góral, M. and Zawadzki, S., 1993. Vapour-liquid equilibria in nonpolar mixtures. II. Carbon tetrachloride with alkylbenzenes and n-alkanes at 313.15 K. Fluid Phase Equilibria, 90: 355-364.

Total vapour pressure measurements using a modified static method at 313.15 K are reported for binary mixtures of CCl4 with benzene, toluene, o-xylene, p-xylene, hexane, heptane, octane, nonane and decane. The results were correlated with the generalized Redlich-Kister equation for excess Gibbs energy. A comparison with literature vapour-liquid equilibrium data and excess enthalpy was made. Consistency within homologous series was checked. Predictions made using the UNIFAC method and the Hildebrand-Scatchard equation were compared.  相似文献   


19.
为了进一步探明葡萄糖在铂电极上的氧化机理,用循环伏安法(CV)在-0.9~0.4 V(相对于饱和甘汞参比电极)内研究了葡萄糖在铂电极上催化氧化行为,首次详细报道了葡萄糖在电化学氧化过程中的电位振荡现象,并用电流扫描法表征了葡萄糖的电位振荡情况.电流扫描结果表明,在较慢的电流扫描速度下,电极过程出现了明显的电位振荡.说明电极上产生了毒化中间物,电位振荡是由于毒化中间物在电极上的吸附和在高电位下氧化除去引起的.  相似文献   

20.
ZnO-MgO nanocomposite was prepared by glycine nitrate combustion method.Its photoluminescence property, the structure and annealing temperature dependence was studied by XRD, FTIR and SEM. The results show that the photoluminescence property of ZnO-MgO nanocomposite is greatly improved compared with that of pure ZnO. Under 325 nm laser excitation, the emission spectra of the 900 ℃ treated composite sample had an obviously enhanced ultraviolet (UV) band centered at 385 nm at room temperature. The luminescence intensity of the UV band became stronger with the increase of annealing temperatures and reached a maximum at 900 ℃ but decreased at 1000 ℃. The photoluminescence intensity was mainly affected by the grain size, the crystallization and the action between ZnO and MgO nanoparticles. In addition, an appropriate G/N value was favorable for improving the UV-PL properties of the nanocomposite samples.  相似文献   

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