量子化学

This sequence can effectively remove the effect of magnetic field inhomogeneity and suppress the solvent signal. It can recover the spectral information such as chemical shifts, coupling constants, multiplet patterns, and relative peak areas in inhomogeneous fields.

本文提出了一种基于分子间多量子相干的有效消除磁场不均匀性和抑制溶剂峰的脉冲序列，利用该序列可在不均匀场下恢复化学位移、J偶合裂分和相对峰面积等谱学信息。

Nanomaterials have many new characterizes which different from the normal materials for their small size, big surface area ratio and quanta dimension domino effect, for examples, the metal with good conductor will be turned into nonmetal when the size is reduced tonanometer levels; the resistance of originally nonconductor will be descended greatly when its size is reduced several nanometers or so, and loss the nonconductor property; the general solid is steady under certain conditions, while under nanometer conditions, the capabilities will be effected greatly by the granule sizes, the newness characteristics made nanomaterials have great appliance foreground on catalyze, optics, and industry produce and so on, therefore the nanomaterials have been the hotspot for materials science, chemistry science and so on.

纳米材料由于尺寸小、比表面积大和量子尺寸效应使它具有不同于常规固体材料的新的特征，如原来是良导体的金属，当尺寸减小到纳米量级时就变成非金属型；原来是绝缘体的物质，当尺寸减小到几纳米或几十纳米时电阻大大下降，失去了绝缘体特性；常规固体在一定条件下物理性能是稳定的，在纳米状态下，颗粒尺寸对性能产生强烈的影响等等，这些新奇的特点使得纳米材料在催化、光学、工业生产等各个方面都有着广阔的应用前景，因此，纳米材料目前已经成为材料科学、物理学及化学等学科的前沿热点。1990年7月在美国巴尔基摩召开了国际第一届纳米科学技术会议，正式把纳米材料科学作为材料科学的一个新的分支公布于世。

In the twentieth century, we saw the great success of application of quantum mechanics to chemistry.

20世纪，量子动力学在化学上的取得了成功的应用。

These free radicals come from the metaboly of food and breath.

人体的每个细胞每天受到约10000次的自由基攻击，这些自由基来源于食物和呼吸的代谢，自由基的攻击方式严格遵循量子与正态分布原理，攻击的损伤程度取决于细胞营养状况、人体酸碱度等物理、化学状况。

Organic fluorescent compound;(benzothiazol-2-yl)naphtho[1; 2-d]oxzole derivatives; UV spectroscopy; Fluorescent spectroscopy; Quantum yield

工程科技I，化学，有机化学有机荧光化合物；苯并噻唑基-萘并噁唑衍生物；紫外光谱；荧光光谱；量子产率

And rhodamine and BODIPY dyes attract more and more attention because of their good photostability, high fluorescence quantum yields and insensitivity to pH.

而罗丹明类荧光染料和BODIPY类荧光染料由于良好的光稳定性和化学稳定性，高荧光量子产率及对pH值不敏感等优点也越来越受到人们的重视。

It is an effective way to use the appropriate narrow bandgap nanosize semiconductors that is stable in chemical and biochemical conditions and not pollute the surroundings in reaction, which sensitizes nanocrysalline titanium dioxide carriers synchronously to prompt the utilization of the solar spectra and the efficiency of photocatalysis.

利用染料分子作表面敏化半导体材料和利用杂质掺杂来实现宽禁带半导体吸收光谱的扩展有一定的局限性，采用化学和生物惰性且对环境不产生二次污染的窄禁带半导体敏化同时考虑团簇颗粒粒径对载体性能的影响，是提高纳米二氧化钛光催化剂对阳光的吸收利用率和量子效率的有效方法。

We have reported results of the spatially indirect photoluminescence spectra measurements performed on undoped ZnSe/BeTe type-ΙΙ quantum wells with special interface structures at low temperature (5—10 K).

报道了具有特殊界面结构（界面包含三个Zn—Te化学键）的非掺杂ZnSe/BeTe II 型量子阱在低温（5—10 K）条件下的空间间接光致发光光谱的实验结果。

We have reported results of the spatially indirect photoluminescence spectra measurements performed on undoped ZnSe/BeTe type-ΙΙ quantum wells with special interface structures at low temperature (5—10 K).

报道了具有特殊界面结构(界面包含三个Zn—Te或Te—Zn化学键)的非掺杂ZnSe/BeTe II 型量子阱在低温(5—10 K)条件下的空间间接光致发光光谱的实验结果。

Buried GaAs/Al〓Ga〓 As quantum wire arrays grown by metal-organic chemical vapor deposition on V-grooved GaAs substrates.

二、用金属有机物化学气相淀积在GaAs V字形沟底制备的掩埋GaAs/Al〓Ga〓As量子线列阵。

Breath, muscle contraction of the buttocks; arch body, as far as possible to hold his head, right leg straight towards the ceiling (peg-leg knee in order to avoid muscle tension).

呼气，收缩臀部肌肉；拱起身体，尽量抬起头来，右腿伸直朝向天花板（膝微屈，以避免肌肉紧张）。

The cost of moving grain food products was unchanged from May, but year over year are up 8%.

粮食产品的运输费用与5月份相比没有变化，但却比去年同期高8％。