分类学

Chemotaxonomic studies in Ferula of China on the basis of flavonoids.

中国阿魏属的黄酮体成分及其分类学意义。

In addition, the edges, veins, skeleton and fissility of plant leaf are also primary features for plant morphology. So we also studied the method of the automatic extraction of these structural features from leaf images, which is a necessary step to design an automatic plant species system.

另外，叶片的叶缘、叶脉、骨架、裂深等叶片结构特征是植物数值分类学的主要分类性状，也是植物形态学分类的依据，通过数字图像处理技术实现这些性状的自动提取，是计算机辅助植物物种识别的重要内容和必然环节，所以对这些叶片结构特征的自动提取方法也进行了研究。

Furthermore,because the interior and exterior characters of fora-miniferal apertures are becoming more and more important in the classification of foraminifera,we should pay more attention to the free specimen s from Paleozoic foraminiferal stu.

另外由于口孔的内部和外部特征在分类学中的地位越来越重要，所以通过实体化石来研究古生代有孔虫理应受到更多的重视。

The different fishes which are employed in the present studies are wild-type salmon, cultured salmon of freshwater and seawater, sea perch and fat greenling. The complete CT gene sequences of salmons are obtained by PCR amplification. The partial CT sequences of sea perch and fat greenling are obtained by in vitro cloning PCR method. Alignment of obtained CT sequences with other fish CT shows that CT appears to be well conserved among the same family. And the relative in taxonomy is far away, the similarity of different fish CTs is low. On the contrary, the closer the relative in taxonomy is, the higher the similarity of different fish CTs is. The sCT is expressed in pGEX-4T-X by recombinant form . We also succeed in the research of sCT expression alone by expression PCR. In addition, sCT antiserum is obtained using GST-sCT as antigen, and the high titer is tested by double immunodiffusion. In the rat bioassay, administration of 50 μg recombinant protein evoked significant hypocalcemia at 1 h after the data are analyzed by t-test.

本文用PCR方法克隆了野生鲑鱼、养殖鲑鱼的降钙素基因，并应用体外克隆PCR的方法首次克隆出鲈鱼、六线鱼降钙素的部分基因序列，通过对克隆的降钙素序列的比较研究，结果显示同一科的鱼降钙素序列保守性较高，同时，根据降钙素的部分氨基酸序列进行了降钙素相似性的比较研究，结果显示在分类学上，分类地位较远的鱼，其降钙素相似性较低，分类地位越接近的鱼，其降钙素相似性越高；我们利用谷胱甘肽S-转移酶(Glutathions S-transferase，GST)融合表达载体pGEX-4T-X对克隆的鲑鱼降钙素基因进行了融合表达研究，应用表达PCR的方法对降钙素基因的独立表达进行了初步的研究探索，并将纯化的融合蛋白作为抗原，获得了高效价的兔抗鲑鱼降钙素免疫血清；生物活性研究表明，大肠杆菌表达的融合蛋白具有显著的降血钙作用。

The results made it possible that in the traditional taxonomy alpaca was breeding camel after domestic guanaco and provided molecular basis for the traditional taxonomy .

结果表明，羊驼与骆马和美洲驼存在的遗传差异相对比羊驼与原驼大，为传统分类学中的羊驼是原驼驯化以后的一种家养驼的提法提供了分子学依据。

With the ability to identify the vascular plants by the herbarium of PPI and in the fields.

植物分类学实习乃为使学生在 PPI 标本馆与野外具有鉴定维管束植物的能力。

Recent graduate students have won prizes for best papers at national meetings in fields such as botany, ecology, entomology, evolution, herpetology, ichthyology, marine biology, parasitology and plant systematics.

近年来该系学生的论文多次在全国性专业会议上获奖，研究领域涉及植物学、生态学、昆虫学、进化、爬虫学、鱼类学、海洋生物学、寄生虫学和系统分类学。

Before further considering the taxonomic arrangement presented by Yesou (2002) it is necessary to describe in some detail the typical appearance and distribution of the main forms of the Herring Gull Assemblage found in South Korea, namely those which are generally being called Vega, Taimyr and Mongolian Gull(from hereon termed the Assemblage).

在进一步讨论yesou在分类学上的重排之前，非常有必要表述下银鸥复合体这些主要类型的典型特征和分布。我们还是称之为织女，灰林，和蒙古银鸥。

They were identified based on morphological observation, physiological and biochemical characteristics, and on analysis of their 16S rDNA gene sequence homology.

根据表型观察、生理生化特性和16S rDNA的序列同源性分析，对菌株进行分类学鉴定。

Then Kuhn fall back on linguistic analysis and advise a taxonomic interpretation of his controversial notion of incommensurability. That is called Kuhn"s "Linguistic Turn.

为此，库恩希望借助语言分析，对不可通约性提出新的分类学解释，这就是人们通常所理解的"语言转向"。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。