光度

An effective method for determination of asphaltene content in oils is reported.

介绍了一种用分光光度法测定油品中的沥青质含量的方法。

With the development of science and technology, sensitive, rapid, reproducible, simple and accurate analytical methods are required for the determination of trace elements in geological, biological and environmental samples. The direct determination of extremely low concentration of trace element with modern atomic spectroscopic method, such as atomic absorption spectrometry is so difficult. On one hand, the limitations are associated not only with the insufficient sensitivity of these techniques but also with matrix interference.

随着科学技术技术的发展，在进行地质、环境、生物等样品中痕量金属元素的测定时，常常要求达到ppb级的水平，虽然火焰原子吸收分光光度法具有很高的灵敏度，但是要直接测定这些样品中的痕量组分却很难，这是因为，一方面，样品本身的物理化学状态有的不适合直接测定，或组分的含量低于分析方法的灵敏度；另一方面是存在基体干扰。

The determination of trace cadmium in the sample of environment by flame atomic absorption spectrometry after separation and preconcentration by Cd-ion imprinted polymers has been developed.

研究了在Cd 离子印迹聚合物分离富集后，用火焰原子吸收分光光度法测定水中痕量镉的方法。

Thiourea and its derivate have an important performance in the analyses of precious metals.Their application to photometric analysis,electrochemical methods,atomic absorption spectroscopy,separation and enrichment of precious metals have been concerned.The related research and development since 1980 have been reviewed.

马媛硫脲及其衍生物(R-NH-CS-NH-R′)以其独特的分子结构在贵金属分析中一直占有重要位置，它们在贵金属的光度分析、电化学分析、原子吸收光谱分析和分离富集等领域中的应用一直为人们所关注，本文重点评述1980年以来相关的研究与发展。

(1) to deliver the Levonorgestrel (0.ml/kg,5mg/m) and Mifepristone gelatum (0.1ml/kg,5mg/ml) per cutem to the rat respectively and measure the serum concentration of levonorgestrel、mifepristone、estradiol and progesterone at different time by the means of HPLC, radioimmunoassay,chemical separation and atomic absorption spectrophotome.

大鼠皮肤涂抹米非司酮凝胶(0.1ml/kg，5mg/ml)和左炔诺孕酮凝胶(0.1ml/kg，1mg/ml)后的不同时间，利用高效液相色谱法、放射免疫分析法、化学分离与原子吸收分光光度法，测量血清中米非司酮浓度、左炔诺孕酮凝胶以及血清雌二醇、孕酮浓度。

Methods The zinc concentration in red blood cell and plasma of 248 full-term infants and the mothers were determined by atonic absorption spectrometry,the infant's bilirubin levels were also measured.

方法利用原子吸收分光光度法测量248例足月新生儿及其母亲红细胞锌与血浆锌，并测定248例新生儿血胆红素值。

So in the case of the Lightspeed Attenuator, we change the volume by changing the intensity of the LED.

因此对于光速衰减器来说，我们通过改变LED的光度来改变阻值。

Selenium content in Se_enriched yeast's autolysate was determinated by adopting spectrofluorimetry.

采用荧光分光光度法测定了富硒酵母自溶物中硒的含量。

But in stationary phase and decline phase, the latter method ould reflect the growth situation of Azotobacter NT06 authentically.

通过分光光度法和活菌计数法分别对固氮菌NT06的生长曲线进行测定，结果表明对数期以前两种方法所测结果基本一致，而在稳定期和衰亡期，活菌计数法能更真实地反映细菌的生长情况。

In this experiment, the content of total flavones in soybean, black bean and soybean sprout were measured using the spectrophotometric method, and distilled water, 70% methanol, 70% ethanol and 70% acetone were chosed as the extraction solvents.

以蒸馏水、70%甲醇、70%乙醇、70%丙酮作为提取剂，用分光光度法测定黄豆、黑豆、黄豆芽中总黄酮的含量。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。