在单位各项事业管理中财务管理的作用

<正>在企业管理中,是以财务管理为中心,同样科研事业单位管理中,财务管理也是单位各项事业管理的中心,这已成为我们大家的共识。财务管理贯穿于单位各个环节,包括科研、生产经营管理的全过程,财务工作中的预算管理、成本费用管理、资金管理水平的高低直接影响

中国产丝齿菌属的研究小记(英文)

对中国产丝齿菌属Hyphodontia的种类进行了研究,并记录了30个种。其中弯孢产丝齿菌Hyphodontia curvispora是中国的新记录种,热带产丝齿菌Hyphodontia tropica是首次在中国大陆的报道。根据作者的采集标本对这两个种进行了详细的描述和显微结构绘图,同时还给出了中国产丝齿菌属30个种的检索表。

中国芮氏孔菌属一新记录种

介绍了芮氏孔菌属的特征,其中日本芮氏孔菌是中国木腐菌新记录种,该种采集于广西壮族自治区。根据中国的材料对该种进行了详细的描述和显微结构绘图。

温度对Ti_(45)Zr_(35)Ni_(20)合金电化学贮氢性能的影响

采用真空熔炼法制备了Ti45Zr35Ni20合金,研究了合金在不同温度下的电化学贮氢性能。结果表明,Ti45Zr35-Ni20电极的电化学性能随着温度而变化,温度从323 K升高到343 K时,电极的活化次数从22次减少到8次,放电容量从86.1 mAh/g增到135.0 mAh/g,快速放电能力也有所提高,然而,高温使电极的循环稳定性显著下降,自放电率增大。

Infrared spectroscopic study on thermal behavior of Langmuir-Blodgett films of octadecyl ammonium octadecanoate and octadecylammonium octadecanoate-d(35)

Langmuir-Blodgett (LB) films of octadecylammonium octadecanoate (C(18)H(37)j7NH(3)(+)C(17)H(35)COO(-),ODASA) and octadecylammonium octadecanoate-d(35) (C18H37+NH3+C17D35COO-, ODASA-d(53)) were prepared and their thermal behaviors were investigated by variable-temperature Fourier transform infrared transmission spectroscopy. It was found that the two hydrocarbon chains of ODASA molecule in LB films are highly ordered while that protonated (H) chain in ODASA-d(35) is partially disordered with some gauche conformers introduced at room temperature.

硬脂酸聚氧乙烯酯与聚乙烯接枝共聚物的制备与表征

以聚氧乙烯为起始原料,合成了一系列硬脂酸聚氧乙烯酯及其丙烯酸酯,用FTIR和1H NMR测试技术对其结构进行了表征,用最大气泡法测定了其表面张力.以其作为接枝单体,利用反应挤出接枝方法制备了系列功能化聚乙烯,用FTIR确定了接枝共聚物的结构和接枝率;用DSC、接触角测量仪对接枝共聚物的热性能、结晶行为和表面性质进行了测试分析。结果表明,含有不同分子量(200、600、1 000、2 000和6 000)聚氧乙烯的硬脂酸聚氧乙烯酯的表面张力分别为30.19、32.22、35.30、38.39和43.37 mN/m;相应的聚乙烯接枝共聚物的结晶温度分别为109.30、109.08、110.18、109.74和109.74℃,水接触角分别为81.06°、70.10°、72.25°、76.40°和95.55°。随着聚氧乙烯分子量的增加,表面活性剂的表面活性降...

Processible nanomaterials with high conductivity and magnetizability. Preparation and properties of maghemite/polyaniline nanocomposite films

A versatile process employing anionic surfactants has been developed for the preparation of processible nanocomposite films with electrical conductivity and magnetic susceptibility. Maghemite (g-Fe2O3) nanoclusters (similar to 10 nm in size) are coated with 4-dodecyl- benzenesulfonic acid, and polyaniline (PAn) chains are doped with 10-camphorsulfonic acid. The coated nanoclusters and doped polymers are soluble in common solvents, and casting the solutions readily gives free-standing nanocomposite films with nanocluster contents as high as similar to 50 wt %. The g-Fe2O3/PAn nanocomposites show high conductivity (82-337 S cm(-1)) and magnetizability (up to similar to 35 emu/g g-Fe2O3).

[Ni(OXPN) Ni(phen)_2 ](Cl O_4)_2 · 2H_2O的合成和性质

合成了新的双核配合物 [Ni(OXPN) Ni(phen) 2 ](Cl O4) 2 · 2 H2 O[OXPN=N,N′-双 - (3-氨丙基 )草酰胺 ],并进行了表征 .测定了对应单晶 [Ni(OXPN) Ni(phen) 2 ](Cl O4) 2 · 2 H2 O· CH3OH的结构及变温磁化率 (4～ 30 0 K) ,表明该配合物属 P1 空间群 ,a=0 .96 6 5 (4) nm,b=1.32 71(7) nm,c=1.716 3(5 ) nm,α=90 .42 (3)°,β=94.12 (3)°,γ=110 .6 4(4)°,V=2 .0 5 35 5 nm3.两个镍原子配位环境分别为平面四边形和畸变八面体构型 .以草酰二胺桥联的 Ni- Ni核间相距 0 .5 2 6 2 nm.磁化率测定表明两个镍原子间没有磁交换作用 ,说明一个镍原子处于平面四边形配位环境

Effects of La3+ and Gd3+ on Ca2+ influx in rat hepatoma H-35 cells

Effects of La3+ and Gd3+ on Ca2+ influx were investigated in rat hepatoma H-35 cells by measuring the initial rate of Ca-45(2+) uptake. It was found that the maximum initial rate of Ca2+ uptake was increased six- to ten-fold at low concentrations of La3+ and Gd3+. Kinetic analyses by measuring the initial rate of Ca2+ influx at different external Ca2+ concentrations indicated the existence of two intracellular exchangeable components in the basal Ca2+ system, with low and high affinities for Ca2+, and only one class of Ca2+ binding sites was observed in the La3+- or Gd3+-treated cells. For high affinity, La3+ and Gc(3+) increased both kinetic parameters K-m and V-max of basal Ca2+ influx. La3+ and Gd3+ compete directly with Ca2+ for Ca2+ binding site for low affinity. The kinetics is competitive.

La~(3+)和Gd~(3+)对鼠肝癌H-35细胞Ca~(2+)内流的影响

通过测定 4 5Ca2 +摄取初速度的变化研究了La3+和Gd3+对鼠肝癌H 3 5细胞Ca2 +内流的影响 .发现低浓度La3+和Gd3+能增加肝癌H 3 5细胞Ca2 +内流初速度达 6～ 10倍 .Ca2 +内流的初速度随Ca2 +浓度变化的动力学研究表明 ,肝癌H 3 5细胞中存在 2类Ca2 +亲和部位的通道 ,即高亲和位和低亲和位Ca2 +内流通道 ,而La3+和Gd3+刺激的肝癌H 3 5细胞则只有 1类Ca2 +亲和位通道 ,La3+和Gd3+增加高亲和位Ca2 +结合通道的Km和Vmax,而对于低亲和位的Ca2 +结合通道Ca2 +内流的作用是竞争性的.

SYNTHESIS AND CHARACTERIZATION OF POLYACRYLATES CONTAINING CHARGE-TRANSFER GROUPS

Polyacrylates containing para-nitro azobenzene have been synthesized by free radical polymerization. The influence of the length of the spacer of the homopolyacrylates (HPn, n=3,4,6), content of methyl acrylate in the copolyacrylates (CP6) with para-nitro azobenzene groups on the thermal properties, such as liquid crystallinity, Tg and Tm, was studied by DSC, WAXD and polarized optical microscopy. Among the polymers studied, only the homopolyacrylate (HP6)with six carbon atoms in the spacer exhibited a nematic phase. The second-harmonic generation (SHG) signal of the poled HP6 film was detected qualitatively by Maker-fringer method.