化学合成

Mesoporous zincum sulfide is synthesized by gentle wet chemosynthesis method, with DDA as templates and Zinc acetate and TAA as precursors. The effect to the synthesis of the ratio of reactive components, the volume of pH, reactive time and reactive temperature has been dicussed systematically, and structures of the as-synthesized samples have been characterized by X-ray diffraction, N2 adsorption-desorption, scanning electron microscopy, Fourier transform-infrared spectra, UV-vis diffuse reflectance spectroscopy, transmission electron microscopy.

以十二胺为模板，醋酸锌及硫代乙酰胺为前驱体，温和湿化学法合成了硫化锌无序介孔结构，系统研究了反应物配比、pH值、反应温度、反应时间对材料合成的影响，运用X射线衍射、N2吸附-脱附、扫描电镜、红外光谱、紫外-可见吸收光谱、透射电镜等分析手段对介孔材料的结构进行了详细的表征。

Meanwhile, the equilibrated conversion of CO and the selectivity of DME would be hemmed in the chemical equilibrium even if in agreeable reaction condition

同时，对合成气直接制二甲醚与甲醇的反应，即使是理想的反应条件，CO的平衡转化率与二甲醚的平衡选择性也要受到化学平衡的限制，不可能超越化学平衡。

The system of nano-structured assembly and molecular assembly is a new field, which is originated from intercrossing and derivatives of physics, chemistry, biology and material science in nanometer scale. It has not only brought the new opportunity to synthesis of new materials, but also opened the new dimension for physical and chemical investigation. The most importance is that it will be the basis of nano-structured device in the future.

纳米结构的组装和分子组装体系是物理、化学、生物学、材料科学在纳米尺度交叉而衍生出来的新的学科领域，它为新材料的合成带来新的机遇，也为物理和化学的研究提供了新的方向，更为重要的是它将成为下一代纳米结构器件的基础。

A tetrahydrofuran derivative as perfume used in tobacco products or daily-use essence is synthesized through such steps as dissolving alpha-pinene as raw material in organic solvent, ozonizing, stirring at -15-15 deg.

本发明是一种新的四氢呋喃衍生物，它的合成方法及将该衍生物用作为香料，属化学香料合成领域。

Key players at the base of the marine food web are diatoms (unicellulor algae with silicified cell walls) and their main predators, the herbiorous copepods.

本文对硅藻产生的防御性物质oxylipins的化学生态学及其在极低浓度下如何其作用进行了综述，同时对其生物合成、测试和化学防御对浮游生物群落结构的影响等进行了讨论。

The results show that nano-crystalline NiAl intermetallic compound can be synthesized by MA taking elemental powders of NixAl100-x(x＝25,30,40,50) as green reactants. Supersaturating solid solution NiAl intermetallic compound can be synthesized by MA using nonstoichiometric Ni-Al powders, and the synthesis mechanism is combustion reaction which includes forced solid solution based on atomic diffusion.

研究表明：NixAl100-x四种成分的元素粉末通过机械合金化方法均制备出纳米晶NiAl金属间化合物粉末；非化学计量配比成分的Ni-Al粉末通过机械合金化合成NiAl过饱和固溶合金，其机械合金化合成机理为含有以原子扩散为基础的强制固溶的燃烧合成反应。

The composition of obtained PMN-PT have been analyzed by means of macro-quantity chemical analysis. The analyzed results of the Pb2+ concentration indicated that PbO in the PMN-PT seldom volatilized at 850℃. The PbO volatility loss could be up to 3.9% when sintered at 1200℃.

采用定量化学分析法对PMN-PT中的阳离子进行滴定分析。pb~(2+)的化学分析结果表明：在850℃下合成PMN-PT钙钛矿相时，氧化铅的挥发量极少。

By analyzing the mineral composition and chemical composition of coal fly ash as well as synthetical mechanism of the 4A molecular sieve ,the technological flowsheet for preparing 4A molecular sieve from coal fly ash with hydrothermal method has been designed.

通过分析粉煤灰的矿物组成、化学成分和4A分子筛合成机理，设计了粉煤灰水热法制备4A分子筛的工艺流程，并重点介绍了粉煤灰的n(S iO2)/n(A l2O3)、n(Na2O)/n(S iO2)、n(H2O)/n(Na2O)、凝胶形成温度和时间、晶化温度和时间以及晶种添加等方面的原理及工艺参数选择情况，可为粉煤灰合成高品质的A型沸石提供借鉴。

Through chemical mimicry that has evolved through specific focus on one host, the cuckoo wasp has synthesised a chemical cloak that conceals all signs of her presence on the beewolf's turf.

通过化学模仿已通过具体的重点发展在一台主机，杜鹃蜂合成的化学物质外衣，但所有迹象掩盖她对beewolf的草皮存在。

Chemical components and phase composition were determined by chemical and XRD analysis.Field-emission scanning electron microscope was employed to characterize the micro-morphologies and particle sizes of the six kinds of calcium borates.

根据化学分析和XRD分析数据确定了各种合成产物的化学组成、物相名称，用场发射扫描电镜对六种硼酸钙的显微形貌、颗粒大小进行了表征，发现它们的显微形貌、颗粒大小有很大的不同。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失