植物化学

METHODS The antioxidant of 75% ethanolic extract and organic solvent extracts, water extracts and polysaccharids from Acanthus ilicifolins L.

方法采用流动注射化学发光法，研究该植物75%乙醇提取物及其有机溶剂萃取分离部分、水提取物及多糖对过氧化氢(H2O2)的清除作用。

The resistance to fungicide of phytopathogenic fungi, especially resistance to in-suck fungicide is a very serious problem, and it brings great difficulty in preventing and controlling of diseases on many agricultural and economic crops, and can lead to huge losses to the countries and the farmers.

植物病原真菌的抗药性特别是对内吸性杀菌剂的抗药性是植物病害化学防治中的一个非常严重的问题，它给多种农作物和经济作物的病害防治带来了严重困难，给国家和农民造成了大量经济损失。

This paper consists of three parts.The first and second part deal with studieson the application and chemical constituents of Sapindus mukurossi Gaertn;Thethird part studies on the application of Hibiscus syriacus.

本论文由三部分组成：第一部分为天然表面活性植物无患子的应用研究；第二部分为无患子的化学成分研究；第三部分为天然表面活性植物木槿叶的应用研究。1。

MethodsThe chemical constituents from zygophyllum fabag were isolated using silical gel and Sephedax LH-20 colomn chromatography and structurally identified by means of various modern spectroscopic technologies based upon their physical properties.

方法利用反复硅胶柱层析、Sephadex LH-20 和制备HPLC等手段进行分离，经光谱分析和理化常数进行鉴定。结果从该植物中分离鉴定了7种化学成分，其中6种首次从该植物分离得到。

Over the past half-century, people have found by comparing that plant dyestuffs are good to people's health and superior to chemical dyestuffs.

半个多世纪以来，人们通过比较，认为植物染料对人体有益无害，这是化学染料无法相比的。特别是发达国家更重视植物染料。

"This structure plays an important role in theories of chemical structure and colour, since quinones occur as pigment s in bacteria, fungi, and certain higher plants; animals containing quinones obtain them from plants they eat."

结构对化学结构和颜色关系的理论起着重要作用。类化合物存在于细菌、某些真菌以及各种高等植物组织中。少数动物中，则是从它们所食的植物摄取的。

"This structure plays an important role in theories of chemical structure and colour, since quinones occur as pigments in bacteria, fungi, and certain higher plants; animals containing quinones obtain them from plants they eat."

结构对化学结构和颜色关系的理论起着重要作用。类化合物存在于细菌、某些真菌以及各种高等植物组织中。少数动物中，则是从它们所食的植物摄取的。

Until now, all taxol used in cancer chemotherapy and scientific research is isolated from yew tree or semi-synthesized from its precursors such as baccatin III, 10-deacetylbaccatin III and so on which all are isolated from this natural plant.

至今为止，所有用于临床治疗和科学研究的紫杉醇都是从红豆杉植物中直接分离或由巴卡丁III， 10-脱酰基巴卡丁III等化学半合成前体合成而得，而这些前体也是由植物中分离得到的。

The " alarm signal" is a chemical message transmitted between individual plants: this too can be measured by the new equipment .

这种&警报信号&是植物与植物之间传递的一种化学信号，这也能通过新的装置探测出来。

Studies on capacity of asexual reproduction of invasive species under disturbed conditions can help us to understand their establishment potential.

研究入侵植物对入侵生境中本地植物物种的化感作用，则有助于了解其成功入侵的化学生态学机理。

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。