成分

The paper studied insecticidal constituent in root of perploca sepium Bunge by photochemistry and pesticide aspect, The main results are as follows.

本论文从植物化学和农药学的角度研究了杠柳地下部分所含的活性成分，并对活性成分作进一步分离。

Except the nutrition elements of Smilacina atropurpurea in Table 1 determined by the authors, the others come from references 〔2〕.

表中营养成分除竹叶菜为本文测定外，其余蔬菜的营养成分来源于文献〔2〕。

The essential oil was extracted by the water streem distillation . And the components of the essential oil from Sonchus brachyotus were identified by GC-MS. Result: 36 components were identified and represented 89.49% of the peak of the essential oil.

采用水蒸气蒸馏法提取长裂苦苣菜挥发油，然后采用气相色谱-质谱联用仪分析和保留指数分析相结合的方法鉴定其挥发油的化学成分，结果：共鉴定出36种成分，所鉴定的组分占挥发油总离子流色谱峰面积的89.49%。

The reflux method was better than microwave-assisted extraction, compared with Soxhlet extraction method and ultrasound wave method.

结论不同提取方法影响虎杖蒽醌类成分和抗氧化活性，蒽醌类成分和抗氧化活性之间具有负相关的关系。

Materials. For example , the specifical chemical ingredient in air or liquid are detected by this kind of sensors ,and are converted into detected current or voltage signal.

化学传感器是一类专门用于检测、感知化学物质的特殊传感器，通常用于检测气体或液体中的特定化学成分，并将该化学成分的浓度信号转换为可检知的电流或电压信号。

Different chemicals have different spectrographic signatures, but those of water and hydroxyl are very similar. Therefore, the scientists can't exactly distinguish whether it is a hydroxyl or water at this point. Nevertheless, the findings overturn long-held beliefs that the surface of the moon was dry and further pave the way for scientists to one day set up a permanent research base on the moon.

不同化学成分会有不同的光谱特徵，但是水和氢氧根的光谱特徵却十分相似，因此科学家目前还无法确实判断月球上的成分到底为氢氧根还是水，尽管如此，这项发现颠覆了长期以来月球表面无水的认知，且更进一步地为科学家将来有一天能於月球上设置长驻研究基地铺路。

The yield, chemical components and relative contents of essential oil extracted from Eupatorium adenophorum Spreng by Soxhlet extraction and steam distillation were compared. The volatile chemical constituents of essential soil extracted were analyzed by Gas Chromatography-Mass Spetrometry. The results showed that the constituents of the volatile from the same plant and the relative contents were significantly different due to different extraction methods.

采用索氏提取器及水蒸气蒸馏两种方法对采于不同时间、不同产地的紫茎泽兰Eupatorium adenophorum Spreng挥发性成分进行了提取，比较了两种方法的得油率、化学组成及其相对含量；采用GC-MS联用技术对其中的挥发性成分进行了分析。

Except for the good spumescence and decontamination, it possesses the bioactivity of antigen and antitch. First of all, the high resolution mass information was obtained by ESI-QTOF. Hence the possible molecular formulars were acquired too. Then we conducted the further detection of the structures of its saponins by using ESI-IT technology.

中的皂苷成分，由ESI-QTOF得到各个皂苷成份的高分辨质量数据进而得到其分子式，然后利用ESI-IT电喷雾串联质谱对无患子总皂苷中各皂苷成分的结构进行进一步的鉴定。

When it comes to the predicates of the semantic stratum, the author , according to the different conflation of five semantic components STATIVE, CHANGE, CAUSE, CONTACT and MOTION , divide verbs into eight types: stative, motion, change, cause, break, cut (CONTACT, MOTION, CAUSE and CHANGE), touch and hit.

在这一层中，作者引用了Levin 基于语义成分的对四个动词hit， touch， cut，和break的分类并把它延伸到英语性状小句中的动词分类，在此基础上，增加了四类动词：空间结构的静态动词，空间结构中的不延及他物的变化动词和不产生显著结果的动作动词及致使结构中不可省略性状成分的纯致使动词。

Now,the method of dynamics is used in normal applications by measuring the sulphation degree of the solid calcium oxide to infer the reaction activity of limestone;but it is not enough on condition of many types of impurity the limestone composition,which has considerable influence on the desulphurization reaction activity of limestone.

目前，国内外主要采用动力学方法，通过测定固态CaO的硫酸盐化程度来推断石灰石的反应活性。但是这在石灰石中含有许多其它杂质成分时是不够全面的，因为这些杂质成分对石灰石的脱硫反应活性影响很大，不能忽视。

The split between the two groups can hardly be papered over.

这两个团体间的分歧难以掩饰。

This approach not only encourages a greater number of responses, but minimizes the likelihood of stale groupthink.

这种做法不仅鼓励了更多的反应，而且减少跟风的可能性。