植物化学的

The journal well informs the research advances in the fields of experimental biology and ecology of insects and other terrestrial arthropods, with both pure and applied scopes, mainly including chemical and sensory ecology, infochemicals, behavioural ecology, biosystematics, evolution, nutrition and natural and transgenic plant resistance etc.

该杂志全面提供了昆虫与其他陆地节肢动物实验生物学与生态学的研究进展，包括理论与应用范围，内容主要涉及化学与感官生态学、信息化学、行为生态学、生物系统学、进化、营养以及自然与转基因植物抗性等等。

The chemical mechanism for the expression of flower color is the ratio of different type of pigments in petals; the anatomic and optical mechanism for the expression of flower color are the dimensional distribution of the pigments in petals and their effects on light; and the physiological mechanism are the pH of cell sap of petal, the developmental stage and the endogenous hormones of flower.

花色素的存在及其变化是植物花色表现的化学机制，色素在花瓣中的空间分布及其对光的作用是花色表现的解剖学和光学机制，细胞液pH值、花发育阶段和植物激素是花色表现的植物生理学机制。

The thickening of the collenchyma and the sclemchyma in different degree and different ingredient are the adaptability of mechanical tissue in plant to the functions in different growth stages.

鲜明的特征。3 植物组织细胞壁结构、成分的特化与功能的适应二植物细胞细胞壁的层次及化学成分高等植物组织一般按功能主要分为保护组织。

The chemical constituents of Huperzia serrata Trev. are mainly flavonoids, triterpenoids and alkaloids. In order to get further comprehension of lycopodium alkaloids, we studied the low-polar section of the alkaloids extraction of Huperzia serrata and 19 alkaloids were isolated by ways of silica gel, RP-18 and Sephadex LH-20 etc. All of their structures, including five new compounds and two known ones that were firstly found from this genus, were elucidated with the help of Mass, IR, NMR spectra and so on. The five new alkaloids (HS-07, HS-08, HS-09, HS-10 and HS-11) are belonged to lycopodine class. The other two ones that were new to this genus (HS-18 and HS-19) are belonged to miscellaneous group.

蛇足石杉的主要化学成分为黄酮，三萜和生物碱，为进一步了解该植物的生物碱成分，我们研究了蛇足石杉氯仿总碱低极性部位的生物碱成分，运用正相硅胶、反相RP-18、凝胶LH-20等方法分得了19个生物碱，并通过质谱、红外、核磁共振等波谱鉴定了它们的结构，其中5个为新化合物，2个为首次从该属植物中分离得到的化合物，所分得的新化合物：HS-07、HS-08、HS-09、HS-10和HS-11均为lycopodine类石松生物碱，首次从该属植物中分得的化合物为miscellaneous类：HS-18和HS-19。

In order to find out the active components, the analysis on chemical composition of the leaf from Broussonetia papyrifera uangyechu through the technology of test tube and paper chromatography were accomplished. The results showed that the leaf contains phenols, amino acids, proteins, polypeptides, saponins, flavonoids and its saponins, sterols, and triterpenes.

为研究光叶楮叶中的化学成分，采用试管法和圆形滤纸层析法对其进行测定，结果表明：光叶楮叶片含有酚性成分、氨基酸、蛋白质、多肽、皂苷、黄酮及其苷类、植物甾醇、三萜等多种化学成分。

PH, dissolved oxygen and chemical indexes for instance total nitrogens, total phosphorus, chemistry oxygen depletion; appraised phytoplankton species complexity; numerated phytoplankton cell density; analyzed various kinds of biological diversities.

主要测定了水温、透明度、pH、溶解氧等物理指标；总氮、总磷、化学耗氧量等化学指标；同时对浮游植物的种类组成、细胞密度和生物多样性指标进行了鉴定、记数和分析。

This year, his group showed that EDR1's role is to weaken a plant alarm signal called salicylic acid, a close chemical relative of aspirin that is produced by cells in diseased parts of the plant and orchestrates the plant's defences against the infection.

今年，他的小组显示，edr1的作用在于削弱一种称为水杨酸的植物预警信号，水杨酸是阿斯匹林的化学近亲，由植物罹病部位的细胞分泌，负责组织植物抵抗感染。

At last, the combination of chlorophyll meter and the remote sensing, the use of chlorophyll fluorescence technique in the nutrition diagnosis of plant nitrogen, and the assessment of the forest ecosystem health and the evaluation of ecosystem services by the nutrition diagnosis of plant nitrogen, were discussed.

根据植物氮素营养诊断的发展脉络，总结了化学诊断和无损测试技术的主要内容，重点阐述了植株硝酸盐快速诊断、叶绿素仪和遥感技术在作物氮素营养诊断及氮肥推荐中的应用原理、优缺点以及发展现状，提出可将叶绿素仪和遥感技术结合使用、利用叶绿素荧光技术诊断植物氮素营养以及将植物氮素营养诊断技术应用于森林生态系统健康和生态系统服务功能的评估。

Plant secondary metabolites are the products of interaction of plant and environment, which including primary compounds of terpenes, alkaloids, flavones, steroids, phenols, etc.

植物的次生代谢物质是植物与环境相互作用的产物，是植物建立起来的用以抵抗植食者及病原菌侵害的化学防御机制。

Chemical speciation of heavy metal is hot topic in soil science, plant nutrition, and environmental science.

重金属化学形态是近年来土壤化学、植物营养和环境科学研究领域的一个热点和难点，利用重金属的化学形态分布和含量变化来评价重金属的生物可利用性，有利于全面研究重金属的危害性和治理重金属污染土壤。

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。