吉林省油页岩特征及开发利用前景

简要介绍了吉林省油页岩的开发历史、现状、技术和方法,以及壳牌石油公司的ICP（地下转换工艺）先进技术,对吉林省建设“生态省”和可持续发展的重要意义。     

Kinetic Migration of Chemical Elements from Ceramic Packaging into Simulated Foods and Mature Vinegar

This study developed a method for simultaneous determination of 19 chemical elements (Al, V, Cr, Mn, Co, Cu, Ga, As, Rb, Y, Zr, Cd, Te, Ce, Pr, Nd, Sm, Er and Pb) in simulated foods [4%, 6% and 8% (w/v) aqueous acetic acid] by microwave‐assisted digestion and inductively coupled plasma mass spectrometry. We examined the migration of these chemical elements from ceramic packaging into the simulated foods and into two types of mature vinegar. The simulated foods showed matrix effects, compared with stock solution solvents (5% ultra‐pure nitric acid). The migration of chemical elements from ceramic packaging into simulated foods was affected by migration time, temperature and acidity of the simulated food. The chemical elements showed different migration behaviours in black and white mature vinegar, and the amount of migration also varied depending on the inner surface of the ceramic packaging. Copyright © 2012 John Wiley & Sons, Ltd.     

Determination of corrosion rate of orthodontic wires based on nickel‐titanium alloy in artificial saliva

The goal of this study was to determine corrosion behavior of three orthodontic wires based on nickel‐titanium alloy (NiTi) in artificial saliva at temperature of 37 °C as function of immersion time. Following orthodontic wires were used: uncoated (NiTi), rhodium coated (Rh NiTi) and nitrified (N NiTi) orthodontic wires. Corrosion of investigated orthodontic wires were monitored by measuring of Ni²⁺ and Ti⁴⁺ ions released in artificial saliva by inductively coupled plasma‐optical emission spectroscopy (ICP‐OES) after 3, 7, 14, 21 and 28 days of immersion. Obtained results indicate that corrosion reaction of the NiTi wires in artificial saliva follows the parabolic rate law. According to the obtained values of parabolic corrosion rate constants, corrosion susceptibility of orthodontic wires decreases in the following order: Rh NiTi wire (K_p = 2.48 μg²/cm⁴ h) > NiTi wire (K_p = 1.6 × 10^–3 μg²/cm⁴ h) > N NiTi wire (K_p = 6.0 × 10^–4 μg²/cm⁴ h). These results indicate that in comparison with uncoated NiTi wire, rhodium coating significantly increases corrosion susceptibility, while nitrification effectively suppresses the release of Ni²⁺ and Ti⁴⁺ ions.     

Dry etching characteristics of HfAlO3 thin films in BCl3/Ar plasma using inductively coupled plasma system

In this study, we monitored the HfAlO₃ etch rate and selectivity to SiO₂ as a function of the etch parameters (gas mixing ratio, RF power, DC-bias voltage, and process pressure). A maximum etch rate of 52.6 nm/min was achieved in the 30% BCl₃/(BCl₃ + Ar) plasma. The etch selectivity of HfAlO₃ to SiO₂ reached 1.4. As the RF power and the DC-bias voltage increased, the etch rate of the HfAlO₃ thin film increased. As the process pressure decreased, the etch rate of the HfAlO₃ thin films increased. The chemical state of the etched surfaces was investigated by X-ray Photoelectron Spectroscopy (XPS). According to the results, the etching of HfAlO₃ thin films follows the ion-assisted chemical etching mechanism.     

In situ Characterization of SiO2 Nanoparticle Biointeractions Using BrightSilica

By adding a gold core to silica nanoparticles (BrightSilica), silica‐like nanoparticles are generated that, unlike unmodified silica nanoparticles, provide three types of complementary information to investigate the silica nano‐biointeraction inside eukaryotic cells in situ. Firstly, organic molecules in proximity of and penetrating into the silica shell in live cells are monitored by surface‐enhanced Raman scattering (SERS). The SERS data show interaction of the hybrid silica particles with tyrosine, cysteine and phenylalanine side chains of adsorbed proteins. Composition of the biomolecular corona of BrightSilica nanoparticles differs in fibroblast and macrophage cells. Secondly, quantification of the BrightSilica nanoparticles using laser ablation inductively coupled plasma mass spectrometry (LA‐ICP‐MS) micromapping indicates a different interaction of silica nanoparticles compared to gold nanoparticles under the same experimental conditions. Thirdly, the metal cores allow the investigation of particle distribution and interaction in the cellular ultrastructure by cryo nanoscale X‐ray tomography (cryo‐XT). In 3D reconstructions the assumption is confirmed that BrightSilica nanoparticles enter cells by an endocytotic mechanism. The high SERS intensities are explained by the beneficial plasmonic properties due to agglomeration of BrightSilica. The results have implications for the development of multi‐modal qualitative and quantitative characterization in comparative nanotoxicology and bionanotechnology.     

微波消解—电感耦合等离子体质谱法测定膨化食品中铝

建立了微波消解—电感耦合等离子体质谱法测定膨化食品中铝的方法。采用微波消解法处理膨化食品,利用内标元素补偿基体效应,结合动态反应池技术消除质谱干扰,进行电感耦合等离子体质谱分析。在优化的实验条件下,铝元素在0.1~1.0 mg/L的浓度范围内呈良好线性关系,相关系数r=0.999 7,检出限为0.023 mg/L(n=11),加标回收率为90.8%~103.0%,相对标准偏差为0.4%~3.2%。本方法具有快速、简单、准确、灵敏度高等特点,适合膨化食品中铝的测定。     

Plasma chemistries for dry etching of NiFe and NiFeCo

Plasma chemistries based on chlorine, bromine, or iodine have been investigated for inductively coupled plasma etching of NiFe and NiFeCo. There is clear evidence of a chemically enhanced etch mechanism with both Cl₂- and I₂- based mixtures, with no enhancement present for Br₂ chemistries. Etch yields are typically low (≤0.25), emphasizing the need for high ion fluxes in order to achieve practical material removal rates.     

Carbon hard masks for etching sub-90 nm structures

Carbon hard mask structures have been used to etch a variety of materials typically used in sub 90 nm DRAM manufacture. The results indicate that carbon hard masks can be used very effectively to structure oxide, nitride and metal films giving the CD performance required for the technologies being investigated.     

萃取色层分离-水平式ICP/AES法测定U_3O_8中25种杂质元素

文章叙述了用TBP萃取色层法分离,水平式ICP/AES法测定U_3O_8中25种杂质元素的分析方法。样品转化为硝酸铀酰后,采用以CL-TBP萃淋树脂为固定相,5mol/l HNO_3为流动相的萃取色层法使杂质元素与铀基体分离,杂质流出液以水平式ICP为激发光源的发射光谱分析法直接测定,取样0.3g,所有元素的测定下限在0.01×10~(-6)～5×10~(-6)之间,方法的重加回收率在82%～121%之间,相对标准偏差在13%以内。     

基于JTAG技术的Flash加载

主要介绍了目前世界上主要流行的一种Flash加载技术——利用JTAG技术加载Flash。文章分为3个部分。首先描述了JTAG加载Flash的原理。然后对JTAG加载Flash的优点做了说明。最后对实验性能做了详细分析。