polycyclic system 中文意思是什麼
polycyclic system
解釋
多環體系- polycyclic : adj. 1. 【生物學】多輪的。2. 【化學】多環的。
- system : n 1 體系，系統；分類法；組織；設備，裝置。2 方式；方法；作業方法。3 制度；主義。4 次序，規律。5 ...
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In this paper, kandelia candel ( l. ) druce hypocotyls were cultivated in sand and treated with 15 % seawater for 60 days under laboratory conditions. the influence of increasing concentrations of napthalene and pyrene ( 0, 0. 1, 1 and 10mg / l ) on hypocotyl germination and growth, photosynthesis metabolism, water metabolism and membrane protection system were observed to inquire into the ecophysiological responses of mangrove k. candel to pahs phytotoxicity. moreover, the concentration and distribution of parent polycyclic aromatic hydrocarbons ( pah ' s ) in surface sediment, underground root and leaf residue of mangroves in jiulong river estuary ( fugong, north and south shores of haimen island, baijiao ), neighbouring xiamen western harbour ( dong islet ) and dongzui harbour ( fenglin ) were examined
在實驗室條件下，分別以0 . 1 、 1和10mg l的萘（ nap ）和芘（ pyr ） 3個梯度濃度組級砂基培養秋茄（ kandeliacandel （ l . ） druce ）幼苗，培養基鹽度15 ，培養期60d ，以不加pahs為對照，分析了nap和pyr對紅樹植物秋茄幼苗的生長、光合代謝、水分代謝以及膜保護系統的影響，探討pahs對紅樹植物秋茄的的生理生態效應及植物性毒害（ phytotoxicity ）的機理。 -
Carbon nanotubes and polycyclic aromatic hydrocarbons ( pahs ) are important research objects of structural chemistry. hexagonal system, which is used to represent mathematicaliy pahs in organic chemistry, is developed perfectly in this century. while the theories concerning different topological invariants and parameters on hexagonal systems tend gradual1y to achieve great successes, the performance of the calcu1ations by pen and paper is still rather tedious, or even impossibie, when the size of molecules increases
碳納米管和多環芳烴（ pah ）是結構化學的重要研究對象，從圖論角度描述有機化學中多環芳烴的六角系統在近代得到了很大的發展，對六角系統的各種拓撲不變量和一些參數的計算已趨完善或正在逐步完善。
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