前驱

Quinolinic acid is an endogenous neurotoxin, that activates the N-methyl-D-aspartate receptor and the biosynthesis of NAD+ precursor.

Quinolinic acid是一种内生性的神经毒素，活化N-methyl-D-aspartate接受器以及在生物合成NAD+的前驱物。

Lead author Indrani Sarkar of the Max Planck Institute for Molecular Cell Biology and Genetics in Dresden, who co-partnered the breakthrough, said, The most important, and likely most difficult, among these is that the enzyme would need efficient and safe means of deliery and would hae to be able to function without aderse side effects on humans.

德累斯顿分子细胞生物学和遗传学Max Planck研究所的前驱者，也是这个突破的合伙人 Indrani Sarkar 说，这其中最重要的，可能也是最困难的是，这个酶去除的方式要是有效的和安全的，并且在作用时对人体没有不良副作用。

TiO2 film was deposited on the stainless seel substrate by using Sol- Gel mehod with Ti(OB4) as a precursor.

采用钛酸正丁酯作为前驱体，通过溶胶-凝胶法在不锈钢基片上制备了TiO2纳米薄膜。

PMW-PT, PNW-PT and PMW-PNN-PT ceramics with pure perovskite structure were prepared by the Semichemical Method or the Hydrothemal-Derived Precursor Method.

采用半化学法或水热前驱体法制备了纯钙钛矿结构的PMW-PT、PNW-PT和PMW-PNN-PT基弛豫铁电陶瓷粉体，探讨了钙钛矿相陶瓷粉体的形成机理，系统研究了各种影响因素对粉体或陶瓷的相组成、显微结构和介电性能的影响。

Yellow serofluid, brown yellow in color and colloid turbid state in appearance, contained sugars, ethanol, solids, and especially rich alcohol, aldehyde, acids, esters and beneficial microbes. It could be used as precursory substance for the improvement of liquor quality and liquor taste and the synthesis of flavoring substances.

黄浆水为棕黄色、胶体混浊态，含有糖分、酒精、固形物，特别是含有大量的醇、醛、酸、酯及有益微生物菌体，是可用来提高曲酒质量、改善风味、合成香味物质的前驱物质。

T. LOUIS, Mo., Sep 4,2008---SAFC Hitech focus area within SAFC a member of the Sigma-Aldrich Group (NASDAQ: SIAL), today announced that it has made significant progress in developing Germanium Antimony Telluride precursors for use in high volume manufacturing phase change memory applications.

AFC Hitech宣布锗-锑-碲材料(GexSbyTez或GST)的开发取得重大进展，GST前驱体用于批量生产相变存储器。

Due to the key challenge for complicated techniques and preparation, there were few reports about ternary systems. A series of polyimide/SiO_2-TiO_2 hybrid films with different contents of inorganic particle were fabricated using tetraethoxyl silicane and tetrabutyl titanate as precursor in situ with sol-gel method and both phases in situ. Chemical structure and micro-morphology of hybrid films were studied by means of IR, SEM and XRD.

本文以正硅酸乙酯和钛酸四丁酯为前驱体，采用原位溶胶-凝胶法和两相原位同步法制备了一系列不同含量的聚酰亚胺/SiO_2-TiO_2杂化薄膜，利用红外光谱、扫描电镜和XRD观察了薄膜的化学结构和微观结构，并测试了薄膜的热稳定性、电击穿场强和耐电晕性。

A series of polyimide/SiO2-TiO2 hybrid films with different contents and weight ratio of inorganic particle were fabricated using tetraethoxyl silicane and tetrabutyl titanate as precursor by situ method. Chemical structure, micro-morphology and thermal stability of hybrid films was studied by means of SEM, IR and XRD, TGA was also tested.

以正硅酸乙酯和钛酸四丁酯为前驱体，采用两相原位同步法制备一系列不同含量及重量比的聚酰亚胺／SiO2-TiO2杂化薄膜，利用红外光谱、扫描电镜和XRD观察了薄膜的化学结构和微观结构，并测试了薄膜的热稳定性。

A series of polyimide/SiO2-TiO2 hybrid films with different contents and weight ratio of inorganic particle were fabricated using tetraethoxyl silicane and tetrabutyl titanate as precursor by situ method .

以正硅酸乙酯和钛酸四丁酯为前驱体，采用两相原位同步法制备一系列不同含量及重量比的聚酰亚胺/SiO2-TiO2杂化薄膜，利用红外光谱、扫描电镜和XRD观察了薄膜的化学结构和微观结构，并测试了薄膜的热稳定性。

In order to enhance the miscibility between the inorganic and the organic phases,the silanol coupling agent is made from the slane VTMS and the colloid silica. Then the silanol coupling agent and nano-particles of ZnSb2O6 as the conductive filler are successfully bonded and the nano-particles of ZnSb2O6 will become more organic-like. The colloid silane-SiO2-ZnSb2O6 precursor solution is subsequently mixed with a homogeneous lsopropylalcohol solution of SR-399 acrylic monomers (Dipentaerythritol pentaacrylate) and the active free radical agent709. Under nitrogen purging, this reaction solution prepolymerize at 60℃. Then, the solution is spin-coated with the spin coator at room temperature. At last, the coated thin film is cured and crosslinked by the UV curing reactor to form the highly transparent thin film with good optoelectronic properties from hybrid organic-inorganic nano-composite.

首先以矽氧烷VTMS和colloid silica制备矽氧偶合剂，再以此偶合剂对分散於异丙醇溶液之奈米级的colloid ZnSb2O6做有机化改质，以增进其与有机高分子基材的键结相容性，我们将此colloid silane-SiO2 - ZnSb2O6前驱物与SR-399有机基材单体(Dipentaerythritol pentaacrylate)的异丙醇溶液与活性自由基光起始剂709均匀掺混后，在充满氮气反应系统下，加热至60℃进行预聚合反应，接著在室温下以旋转涂布机旋转涂布成厚度均匀薄膜，最后将此薄膜直接高温硬化或以UV硬化机网状键结硬化成透明与具部份导电性等光电特性之无机/有机奈米混成薄膜。

And discuss some key point of integrated management system design, include hazard identification and risk assessment and risk control in the occupational health and safety management, the measure of satisfaction target of customer, the flawlessness of law system, the integration of the integrated management system and enterprise standardization system, unify lead institution and work orgnization, integreted internal audit and integrated management review.

同时，论述了一体化管理体系构建中的几个主要问题，包括职业健康安全管理中的危险源辨识、风险评价和风险控制、顾客满意度的科学监测、法律、法规体系的完善、一体化管理体系与企业标准化体系的有机结合、统一的领导机构和工作机构、一体化的内部审核和管理评审。

Deepwater Taranaki is investigated for its petroleum potential, using all available seismic data tied to shallow-water wells.

运用与浅水井相关的现有全部震波探测数据考察了深海区塔拉纳基盆地的油藏前景。