Template-free, surfactantless route to fabricate In(OH)(3) monocrystalline nanoarchitectures and their conversion to In2O3

In this work, a one-dimensional microrod-based three-dimensional flowerlike indium hydroxide (In(OH)(3)) structure was fabricated, without any templates or surfactants, using a well-known hydrothermal approach at a non-high temperature. In2O3 with similar morphology was formed by annealing In(OH)3 precursors and was characterized by Raman spectrum and photoluminescence (PL) spectrum in detail.

Extraction and recovery of cerium(IV) along with fluorine(I) from bastnasite leaching liquor by DEHEHP in [C(8)mim]PF6

BACKGROUND: Ionic liquids (ILs) as environmentally benign solvents have been widely studied in the application of solvent extraction. However, few applications have been successfully industrialized because of the difficult stripping of metal ions or the loss of components of the ILs. More work needs to be done to investigate the extraction behaviour of IL-based extraction systems. In this work, the extraction behaviour of Ce(IV), Th(IV) and some trivalent rare earth (RE) nitrates by di(2-ethylhexyl) 2-ethylhexylphosphonate (DEHEHP) in the IL, 1-methyl-3-octylimidazolium hexafluorophosphate ([C(8)mim]PF6), was investigated and compared with that in the n-heptane system. In particular, the effect of F(I) on the extraction mechanism for Ce(IV) and its separation from Th(IV) was investigated. Otherwise, the recovery efficiency of Ce(IV) and F(I) from a practical bastnasite leach liquor was examined using IL based extraction.

A temperature-dependent interaction of neutral red with calf thymus DNA

Neutral red (NR) is used as a probe to study the temperature and concentration dependent interaction of a cationic dye with nucleic acid. A temperature-dependent interaction of NR with calf thymus DNA (CT DNA) has been studied by differential pulse voltammetry (DPV), UV-Visible absorption, circular dichroism (CD) and fluorescence spectroscopy. The experimental results of increasing peak current, changes in the UV-Visible absorption and fluorescence spectra of NR and decreasing the induced circular dichroism (ICD) intensity show that (i) the binding mode of NR molecules is changed from intercalating into DNA base pairs to aggregating along the DNA double helix and (ii) the orientation of NR chromophore in DNA double helix is also changed with the temperature.

Analysis of monodispersed polyaniline oligomers by matrix-assisted laser desorption ionization mass spectrometry

Monodispersed polyaniline oligomers was studied by matrix-assisted laser desorption ionization-time of flight mass spectrometry (MALDI-TOF-MS), It is found that MALDI-TOF-MS is not only a direct, accurate and rapid tool for the analysis of monodispersed polyaniline oligomers, but also a useful technique for the design of synthetic route.

单分散聚苯胺齐聚物的激光解吸电离质谱

采用基质辅助激光解吸电离飞行时间质谱（ＮＡＬＤＩ－ＴＯＦ－ＭＳ）技术分别对８个单分散 的聚苯胺齐聚物进行了分析研究。实验结果表明，ＭＡＬＤＩ－ＴＯＦ－ＭＳ不但可以作为分析单分散 聚苯胺齐聚物的直观、准确、快速的分析工具，而且可以为合成路线的确定提供有利的证据。

Determination of some basic constants of sec-octylphenoxy acetic acid

In this work some basic constants of extractant Sec-Octylphenoxy acetic acid (CA-12) such as solubility (S) in water, dissociation constant (K-a) in aqueous solution, dimerization constant( K-2) and distribution constant (K-d) between water and haptane have been determined by two phase titration method. The results are as follows: S = 1.40 x 10(-4) mol/L, K-a = 3.02 x 10(-4), K-2 = 3.56 x 10(2), K-d = 4.06 x 10(2) (25 +/-0.5 degreesC).

仲辛基苯氧基乙酸基本常数的测定

在 2 5℃ ,利用两相滴定法测定了仲辛基苯氧基乙酸 (CA 1 2 )在水中的溶解度S ,离解常数Ka,庚烷中的二聚常数K2 和水 庚烷两相间的分配常数Kd 。实验测得S =1 .40× 1 0 - 4mol L ,Ka=3 .0 2×1 0 - 4,K2 =3 .5 6× 1 0 2 ,Kd=4.0 6× 1 0 2 。

Preparation and characterization of a new blend of poly(2-hydroxyethyl methacrylate) and poly(ethylene glycol)

A new blend of poly(2-hydroxyethyl methacrylate) (PHEMA) with poly (ethylene glycol) (PEG) was prepared. The results from solid-state NMR indicate that the PHEMA/PEG(88:12, w/w) blend is miscible on a molecular level.

Separation and determination of organogermanium compounds by ion chromatography

For nearly three decades, organogermanium compounds have become increasingly of interest owing to their extensive physiological and pharmaceutical activity. In this paper, two new high performance ion chromatographic methods for separation and determination of three kinds of organogermanium compounds beta-carboxyethylgermanium sesquioxide (I), beta-(alpha-methyl)-carboxyethylgermanium sesquioxide (II) and d-(beta-carboxyethyl)germanium hydroxide (III) were proposed. A Dionex DX-300 ion chromatograph equipped with a Dionex FED-II pulsed electrochemical detector (conductivity mode), and a Dionex AI-450 chromatography workstation was employed. The separation was achieved by using ion-exchange or ion-exclusion mechanism. The detection limits(S/N=3, expressed as germanium) for the three compounds were all below sub- mu g/mL level. The methods have been applied to the analysis of tonic oral drinks, and the average recoveries for the three compounds range from 95 - 108%. The results obtained were in agreement with those of hydride generation atomic fluorescence spectrometry (HG-AFS).

微胶囊固定化过氧化氢酶

以乙基纤维素为膜材，用液中干燥法将过氧化氢酶微胶囊化。研究了温度和ｐＨ值对酶活性的影响及过氧化氢和尿素对固定化酶的抑制作用。由于乙基纤维素膜的保护，明胶对ｐＨ值的缓冲作用及明胶与尿素的反应，明显地扩大了酶对温度和ｐＨ值的适应性，降低了酶活性抑制剂的影响。

Identification and assessing the cultivars of Laminaria Lamx. (phaeophyceae) with molecular markers

Molecular markers were used to identify and assess cultivars of Laminaria Lamx. and to delineate their phylogenetic relationships. Random amplified polymorphic DNA (RAPD) analysis was used for detection. After screening, 11 primers were selected and they yielded 133 bands in all, of which approximately 99.2% were polymorphic. The genetic distances between gametophytes ranged from 0.412 to 0.956. Two clusters were formed with the unweighted pair group method with arithmetic mean (UPGMA) dendrogram based on the simple matching coefficient. All cultivars of Laminaria japonica Aresch. used for breeding in China fell into one cluster. L. japonica from Japan, L. saccharina (L.) Lam., and L. angustata Kjellm. formed the other cluster and showed higher genetic variation than L. japonica from China. Nuclear ribosomal DNA (rDNA) sequences, including internal transcribed spacers (ITS1 and ITS2) were studied and aligned. The nucleotides of the sequences ranged from 634 to 668, with a total of 692 positions including TTS1, ITS2, and the 5.8S coding region. The phylogenetic tree obtained by the neighbor-joining method favored, to some extent, the results revealed by RAPD analysis. The present study indicates that RAPD and ITS analyses could be used to identify and assess Laminaria germplasm and to distinguish some species and, even intraspecies, in Laminaria.

胜利滩浅海地区高精度地震资料处理方法研究

滩浅海地震勘探主要包括滩涂、两栖地带、浅海三部分，在野外采集中，因激发震源、检波器和表层岩性不同，使得滩涂、两栖带和浅海各段地震记录的子波不同，资料品质差异大、相位不一致，在滩海接合部剖面同相轴连续性差、信噪比低、构造形态改变，无法将反射波场的动力学特征直接用于储层反演和油气预测。 文中根据滩浅海地震勘探的特点，系统地开展了资料处理技术研究。针对滩浅海地区地震资料子波差异问题，研究了振幅处理技术和子波处理技术，在振幅处理方面，利用地表一致性振幅校正和剩余振幅校正，较好地解决了资料的振幅差异问题；在子波处理方面，提出在多约束条件下利用地表一致性反褶积、两步统计子波反褶积、匹配滤波等子波处理技术结合的方法进行子波压缩和一致性校正。针对表层变化大的特点，研究提出基于层析反演近地表模型的波动方程基准面静校正技术，通过层析反演的方法，建立较准确的近地表速度模型，较好地解决了滩浅海资料的静校正问题。在检波器二次定位方面，开发应用圆-圆定位方法和检波器空间差异校正技术，较好地解决了检波器受风浪、潮汐、海流影响发生的漂移问题。针对滩浅海资料噪音的特点，文中还研究了高保真噪音衰减技术，采用预测反褶积、相关滤波、拉冬变换、波动方程和优化组合多重压制方法压制不同类型的多次波；对于各种各样的噪音，研究了噪音产生机制及地震数据在不同数学域、不同地球物理域及其不同多维构成下的特点，提出了基于地震数据重构的多次波衰减技术。在成像技术方面，研究了主能量优化叠加技术、时差校正垂直叠加技术、共反射面元叠加技术、全方程优化系数有限差分偏移技术和叠前时间偏移技术，基本解决了滩海资料的叠加成像和偏移成像问题。 根据以上研究成果，对胜利油田郭局子地区、桩西地区等滩浅海地震资料进行处理，提高了滩浅海资料的成像精度，取得了良好的应用效果。

放牧率对高寒混播草地主要植物种群生态位的影响

对垂穗披碱草／星星草混播草地不同放牧率下22种植物种群优势度和生态位分化规律的研究结果表明：不同放牧率下混播草地的建群种相同，而次优势种和伴生种发生了明显变化；不同放牧率下混播草地的建群种垂穗披碱草因其高度和发达的根系成为竞争的优胜者，抑制了星星草的生长，因而其生态位宽度最大，为0．956，星星草次之，为0．821；不同放牧率下混播草地的建群种垂穗披碱草、星星草和侵入种早熟禾与其他植物种之间（除了落草、紫羊茅和乳白香青）及彼此之间的生态位重叠均较大，而同属的鹅绒萎陵菜、多裂萎陵菜和雪白萎陵菜之间以及生活型相近的小嵩草、矮嵩草和青海苔草之间的生态位重叠也较大。这说明具有相同形态特征或生活型的物种之间生态位重叠较大，且生态位宽度较大的物种与其他种群间也有较大的生态位重叠，但分布于放牧演替系列两个极端的种群间生态位重叠较小。

富维人参果饮料中微量元素营养特征分析

通过富维人参果饮料中微量元素的分析测试, 说明其中含有丰富的铁、适宜的锌、硒和铜、锰等微量元素, 讨论了在营养强化以及补血、提高机体免疫力等方面的营养保健功能及其微量元素营养的功效学意义。