【摘 要】
：
Calcium ions play an important role in the oxygen_evolving process of photosystem Ⅱ as demonstrated in many experiments. The changes of the secondary structures of PS Ⅱ induced by the depletion of Ca
【出 处】
：
Chinese Science Bulletin
论文部分内容阅读
Calcium ions play an important role in the oxygen_evolving process of photosystem Ⅱ as demonstrated in many experiments. The changes of the secondary structures of PS Ⅱ induced by the depletion of Ca 2+ were reported. The results indicated that th
其他文献
The most important goal of virtual reality is to create a virtual world by computers where users are allowed to view the environment and control the virtual objects interactively. naditionally virtual
Introduce heuristically the newly definitioll (W. Thomas) for graph automata - using"tiles" to simulste the extension (over dags) of the classical notions of transition moves; proposea sufficient cond
分析了头发的基本特性，据此提出了一套建立单根头发模型的方法，并根据头发生长的区域特性给出头发簇模型的建立方法，进而用头发簇组成完整的头发模型．还提出了利用线模型仿真体模型生成头发真实感图象的计算方法．
沿海垦区主要农作物耐盐性试验研究初报夏杰邹杰国潘昌保殷汝成（江苏省沿海水利科学研究所，东台２２４２００）海涂土壤为盐渍土，在海涂开发利用综合治理盐渍土的同时，研究沿海垦区主要农作物的耐盐性，将为新垦区合理规划种植布局、因地制宜种植作物品种、提高垦区粮...
在UNIX环境下实现Ada的图形用户界面一直是一个比较困难的问题。X/Motif Ada Bindings是一个Ada与Motif工具箱的低级接口工具集,它可用于实现Ada的图形用户界面,本文从它的解决方案、体系结构及接口机制等几个方面对此软件包的实现进行了比较深入的研究分析,并基于此软件包和现有操作平台提供了一种高效的Ada GUI实现策略。
将１４Ｃ－糖和３Ｈ－水分别引入到棉茎韧皮部和木质部，结果表明，同化物在韧皮部中运输时，必须有木质部水分的参与，和木质部分离的韧皮部不能单独履行运输同化物的功能；同化物在韧皮部中以液流形式运输，液流中的水主要来自木质部。同化物向韧皮部的装载，是不伴随水的主动装载过程。韧皮部同化物运输和木质部水分密切相关。
In the last decade and a half, a number of earthquakes of magnitude 4-5 have occurred in the Beijing_Tianjin_Tangshan_Zhangjiakou (BTTZ) region. On the basis of the analysis of the temporally continu
In phloem transport, whether protoplasmic activity participates in assisting sap flow in sieve element_companion cell complex has long been in debate. The present investigation assumed microfilament (
The relationship between the stomatal density of five woody plants endemic to China, i.e. Eucommia ulmoides, Quercus liaotungensis, Q. glandulifera var. brevipetiolata, Cyclocarya paliurus and Ficus h
Fractal geometry was applied and box dimension was used as an indicator to analyze the effects of doubled CO\-2 concentration on the root growth of plant seedlings. Results showed that doubled CO\-2 c