This paper reported the extraction and the preliminary determination of flavonoids in sweet potato leaves and stems by UV-spectrophotometry using rutin as comparison sample.
通过对甘薯叶、茎中的总黄酮含量进行了提取，以芦丁为对照品，用紫外分光光度计对其含量进行了初步测定。
The advantage of this method is that preliminary determination of the position of the major polarization axis is not needed and calculations of beat lengths become very simple.
本方法的优点是不须预先确定光纤的偏振主轴的位置而且拍长度的计算也很容易。
The amount of the provisional anti-dumping duty, cash deposit, bond or other forms of security provided shall not exceed the margin of dumping established in the preliminary determination.
临时反倾销税税额或者提供的保证金、保函或者其他形式担保的金额，应当不超过初裁决定确定的倾销幅度。
Price undertakings shall not be sought or accepted unless MOFCOM have made a preliminary affirmative determination of dumping and injury caused by such dumping.
商务部对倾销以及由倾销造成的损害作出肯定的初裁决定前，不得寻求或者接受价格承诺。
The result shows that using velocity measuring data after error correction in preliminary orbiting computation can effectively improve the orbit determination precision.
计算结果表明，使用经各种误差修正后的测速数据参与初轨计算能有效提高定轨精度。
After the preliminary affirmative countervailing duty determination, USA continually launched several CVD and AD investigations to several other China products.
在对“铜版纸案”做出肯定性初裁后，美国相继又对我国其他出口产品发起了多起“双反”调查。
After the preliminary affirmative countervailing duty determination, USA continually launched several CVD and AD investigations to several other China products.
在对“铜版纸案”做出肯定性初裁后，美国相继又对我国其他出口产品发起了多起“双反”调查。
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