Study on the hydrogen storage property of (TiZr0.1)xCr1.7-yFeyMn0.3 (1.05

Jigang Li  Li Xu  Xiaojing Jiang  Xingguo Li 《自然科学进展(英文版)》2018,28(4):470-477

肝硬化患者血浆中PCT、内毒素及细胞间粘附分子-1的临床研究

目的对肝硬化患者与正常人血浆中PCT、内毒素及细胞间粘附分子．1等指标进行比较，探讨这些指标与肝硬化之间的关系．方法随机选取30位肝硬化患者及30位正常人的血浆进行PCT，ET及sICAM-1水平进行测定．结果与对照组相比，随着病情严重程度，肝硬化患者血浆PCT、内毒素、sICAM-1水平均显著增高＋结论肝硬化患者血浆水平与肝硬化患考的严重程度密切相关，它们在致肝组织病变持续加重过程中均具有重要作用．     

Structural and electrical properties of lanthanum-substituted lead titanate ceramics

The effect of lanthanum substitution on the structural, dielectric and piezoelectric properties of lead calcium titanate (PCT) ceramics is studied. Samples with compositional formula Pb_{0.76? x} La _x Ca_0.24Ti_0.98Mn_0.02O₃ (PLCT) (x?=?0–0.08, in steps of 0.02) were prepared by the conventional dry ceramic technique. Phase and structural analysis was carried out using XRD and SEM respectively. X-ray analysis confirmed the formation of single-phase compound with tetragonal crystal structure. Dielectric properties were studied in detail as a function of frequency and temperature. The Curie temperature (T _C) and tetragonality (c/a) was found to decrease with increase in lanthanum content. The Curie temperature was also confirmed from the thermal-expansion behaviour of the sintered samples. Piezoelectric coefficients (d ₃₃, d ₃₁, g ₃₃, g ₃₁, g _h, d _h, k _t and k _p) were measured at room temperature. From this study it is found that La³⁺ substitution helps in the improvement of electro-mechanical anisotropy.     

类金刚石碳膜电极传感药物分子

以类金刚石碳膜(DLC)为工作电极,通过电化学方法来传感药物分子扑热息痛(PCT:paracetamol)和咖啡因(CF:caffeine).在室温条件下,pH为6.76的缓冲溶液中,通过循环伏安法可以分别和同时检测PCT和CF,并分别得到了对应的标准曲线.结果显示,在测试范围内PCT和CF的浓度都与峰电流呈良好的线性关系,DLC电极可以作为PCT和CF的生物传感器.     

氢中杂质CO对LaNi5,LaNi4.7Al0.3,MlNi4.5Al0.5合金PCT特性的影响

研究了 3种贮氢合金 ,即LaNi5 ,LaNi4.7Al0 .3,MlNi4.5 Al0 .5 在纯氢 ( 99 999% )及含 0 0 1%CO气体杂质氢中毒化前后的PCT特性。对于LaNi5 ,毒化后不出现平台 ;对LaNi4.7Al0 .3及MlNi4.5 Al0 .5 合金 ,平台压升高 ,平台倾斜加剧 ,平台宽度缩小 ,饱和吸氢量减小。LaNi5 中加入少量Al后 ,可以提高其抗毒化能力。分析了PCT平台变短、倾斜的原因。     

Scasimir Operator,Scentre and Representations of Uq(osp(1|2))

Recently, Borchers has shown that in a theory of local observables, certain unitary and antiunitary operators, which are obtained from an elementary construction suggested by Bisognano and Wichmann, have the same commutation relations with translation operators as Lorentz boosts and P₁CT operators would have, respectively. It is concluded from this that as soon as the operators considered implement any symmetry, this symmetry can be fixed up to at most some translation. As a symmetry, any unitary or antiunitary operator is admitted under whose adjoint action any algebra of local observables is mapped onto an algebra which can be localized somewhere in Minkowski space.     

恶性肿瘤患者血小板参数的变化及临床意义

目的探讨恶性肿瘤患者血小板参数的变化及临床意义。方法以同期80例健康体检者为对照,回顾性分析80例恶性肿瘤患者血小板参数的变化与肿瘤转移的关系。结果恶性肿瘤患者血小板计数（PLT）、平均血小板体积（MPV）、血小板压积（PCT）及血小板分布宽度（PDW）高于正常对照者（P〈0.01）,伴转移者PLT和PCT高于无转移者（P〈0.01）,而PDW和MPV无显著性差异（P〉0.05）。结论恶性肿瘤患者血小板参数明显增高,提示血小板与了肿瘤的生长和转移有密切关系,血小板参数可作为恶性肿瘤疗效及预后判断的参考指标。     

Poly(ethylene‐co‐1,4‐cyclohexylenedimethylene terephthalate) copolyesters obtained by ring opening polymerization

Cyclic oligomer fractions of ethylene terephthalate c(ET)_n and 1,4‐cyclohexylenedimethylene terephthalate c(CT)_n were obtained by cyclodepolymerization of their respective polyesters, the former containing around 80 mol % of trimer and the latter with around 70 mol % of trimer to pentamer. Mixtures of these fractions at selected compositions were subjected to ring opening copolymerization to give a series of poly(ethylene‐co‐cyclohexylenedimethylene terephthalate) copolyesters with ET/CT comonomer ratios ranging from 90/10 to 10/90. The copolyesters were characterized by GPC and NMR, and their thermal properties were evaluated by DSC and TGA. They had essentially the same composition as the feed from which they were produced and had an average‐weight molecular weights between 30,000 and 40,000 g/mol with polydispersities between 2 and 2.7. The distribution of the monomeric units in these copolyesters was essentially at random although it evolved to be a blocky microstructure as the contents in the two comonomers became more dissimilar. Their thermal behavior was the expected one for these types of copolyesters with crystallinity and heating stability decreasing with the content in CT units. © 2009 Wiley Periodicals, Inc. J Polym Sci Part A: Polym Chem 47: 5954–5966, 2009     

IT学科中项目综合实训环节的设计

分析了当前本科毕业生的质量及就业现状,提出了项目综合实训环节以改善就业形势。随后介绍了项目综合实训的目的、实施时间,并详细介绍了项目综合实训实施方式中的6个步骤。最后的结语中给出了实现项目综合实训环节难点的解决办法。     

Effect of annealing temperature on microstructure of chemically deposited calcium modified lead titanate thin films

Thin ferroelectric films of calcium modified lead titanate Pb_1−xCa_xTiO₃(PCT) have been prepared by chemical deposition process. The as deposited amorphous films were thermally treated for crystallization and formation of perovskite structure. Characterization of these films by X-ray diffraction (XRD) have been carried out for various amounts of calcium (Ca)-doping (0.20, 0.24, and 0.28) on indium tin oxide (ITO) coated corning glass substrates. For a better understanding of the crystallization mechanism, the investigations were carried out at various annealing temperatures (450, 550, and 650 °C). Characterization of these films by XRD shows that the films exhibit tetragonal phase with perovskite structure. Atomic force microscope images (AFM) are characterized by slight surface roughness with a uniform crack-free, densely-packed structure. Also, Fourier transform infrared spectra (FT-IR) of the as deposited film and annealed thin films (x=0.24) at 650 °C on silicon (Si) substrates were taken to get more information about the film formation. Dielectric studies of the films were carried out and reported.