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When the excitation intensity exceeded a threshold,very sharp peaks emerged in the emission spectra from 650～750 nm.

当激励强度超过阈值时，在650～750 nm区域有很强的受激发光峰。这些受激发光峰的半高宽小于0.5 nm。

Methods After extracting the samples, the reaction between thymol and nitrate produced nitrothymol in the presence of sulphuric acid; then nitrothymol was made to react with sodium hydroxide; determination was made on the concentration of nitrate by spectrophotometry at 412 nm.

样品经提取，其中的硝酸盐在硫酸酸性条件下，与麝香草酚生成硝基化合物，再与氢氧化钠作用，生成黄色化合物，在波长412nm处用分光光度法测定食品中硝酸盐含量。

The detection wavelength was set at 274 nm.Result The linear range of thymol was 0.04～1.23 mg (r=0.9999),and the average recovery was 99.02%(RSD 1.03%).

结果 百里香酚在0.04～1.23 mg (r=0.9999)有良好的线性关系；平均回收率百里香酚99.02%(RSD 1.03%)，重复性百里香酚RSD 0.88%。

We could calculate the size of TiO〓 particle from 45-69 nm.

通过计算得出纳米颗粒的平均粒径在45—69nm之间。

The virus titer was determined by measuring the absorbance at 260 nm.

通过测定260 nm的紫外光吸收值估计病毒高度。

The topography measurement is in a range of 20 μm with a resolution of 0.1 nm.

表面轮廓的范围为 2 0 μm并具有 0 。1nm的分辨力。

The refractive indices of some fresh animal tissues in vitro were studied at wavelength of 650 nm by total internal reflection.

利用全反射原理测量了新鲜离体动物组织在650 nm处的折射率。

A novel fiber Bragg grating with two transmission dips in 1310- and 1550-nm regions is proposed and inscribed by an infrared femtosecond laser.

利用红外飞秒激光制作了在1310纳米和1550纳米波段有两个峰值的新型光纤布拉格光栅。

Study on transmission spectrum of ZnO films;2. Study of Measuring Grating Parameters with Transmission Spectrum and Design of Perfect Anti-reflection Coating;3. Kinetics of the oxidation process of the copper films in the thickness range of 16～22 nm at 140 ℃ was studied by using transmission spectrum and sheet resistance methods.

采用方块电阻和透射光谱两种方法为表征手段，测量16～22nm范围内不同厚度Cu薄膜在140℃下完全氧化所需要的时间，得到了Cu薄膜氧化反应的动力学曲线，并利用X射线衍射分析了氧化产物的晶相结构和成分。

The fabrication of transmission gratings with the grating constant of 2.5μm and 5μm is studied in ZK6 and LaF2 glasses at the machining speed of 400μm/s by using femtoscond laser with the peak intensity of 2.7×10~(13)W/cm~2, and the diffraction patterns of the grating are presented with a semiconductors laser at 650 nm.

在加工速度为400μm/s、激光的峰值功率密度为2.7×10~(13)W/cm~2时，在ZK6玻璃和LaF2玻璃内制备出光栅常数为2.5μm和5μm的透射式衍射光栅，并在650nm的半导体激光照射下获得了光栅的衍射图样。

Nowadays, most of research are to build a transmutative Petri Nets through adding controlling place sets, controlling arc sets and controlling policy to the basic Petri Nets, while the Controlled Petri Nets could be used to argue many controlling theory problems conveniently and to induce many logically and physically supervisory and solve the Event Feedback Controlling Problems and State Feedback Controlling Problem in DEDS supervisory theory.

目前大多数的研究表现为在变形后的受控Petri网基础上，利用各种方法求得各种逻辑型、结构型控制器，解决DEDS监控理论中的事件反馈控制问题与状态反馈控制问题。

On one hand, there are discussions with the works council and union about extension of short time working up to the end of September.

一方面，有讨论，工程理事会和联盟关于延长工作时间短至9月底。