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关于植物光合作用的量子分析 被引量:3
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作者 苗洪利 郑荣儿 +3 位作者 彭凯平 王晶 赵建纲 林敬文 《激光生物学报》 CAS CSCD 2004年第6期411-413,共3页
以无限深势阱为模型,应用量子力学微扰理论计算了叶绿素中电子跃迁几率,并且求得电子对阱壁产生的压力以及所做的构像功。研究结果表明:只有外场频率与叶绿素的固有频率相等时电子才发生跃迁,从而导致叶绿素吸收中心波长432nm的蓝光和66... 以无限深势阱为模型,应用量子力学微扰理论计算了叶绿素中电子跃迁几率,并且求得电子对阱壁产生的压力以及所做的构像功。研究结果表明:只有外场频率与叶绿素的固有频率相等时电子才发生跃迁,从而导致叶绿素吸收中心波长432nm的蓝光和662nm红光。当电子跃迁到高能级,对阱壁的压力增大,阱壁被拓宽,激发电子做了构像功,激发了酶的活性,促使植物光合作用。 展开更多
关键词 叶绿素 吸收谱 势阱 构像功 光合作用
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The Makings of an Icon: Analysis of Photograph of Israeli Soldiers
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作者 Edna Barromi Perlman 《Journalism and Mass Communication》 2015年第6期298-308,共11页
This study analyses an iconic photograph of Israeli paratroopers, photographed in Jerusalem in 1967. It explores how visual and formal structural components in the image function in this photograph and how they contri... This study analyses an iconic photograph of Israeli paratroopers, photographed in Jerusalem in 1967. It explores how visual and formal structural components in the image function in this photograph and how they contribute to the process of creating an icon. It explores the mechanisms that exist in visual icons and addresses the question of why some press photographs turn into iconic images while other do not, and if there is a connection between the visual structural elements in the images and the way they are perceived by the public. The study discusses how this visual logic correlates with other elements such as public opinion and myths. 展开更多
关键词 Photographs icons SYMBOLS Israel SOLDIERS MYTHS ZIONISM
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Roles of the hippocampal formation in pain information processing 被引量:6
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作者 刘明刚 陈军 《Neuroscience Bulletin》 SCIE CAS CSCD 2009年第5期237-266,共30页
Pain is a complex experience consisting of sensory-discriminative, affective-motivational, and cognitive-evaluative dimensions. Now it has been gradually known that noxious information is processed by a widely-distrib... Pain is a complex experience consisting of sensory-discriminative, affective-motivational, and cognitive-evaluative dimensions. Now it has been gradually known that noxious information is processed by a widely-distributed, hierarchically- interconnected neural network, referred to as neuromatrix, in the brain. Thus, identifying the multiple neural networks subserving these functional aspects and harnessing this knowledge to manipulate the pain response in new and beneficial ways are challenging tasks. Albeit with elaborate research efforts on the cortical responses to painful stimuli or clinical pain, involvement of the hippocampal formation (HF) in pain is still a matter of controversy. Here, we integrate previous animal and human studies from the viewpoint of HF and pain, sequentially representing anatomical, behavioral, electrophysiological, molecular/ biochemical and functional imaging evidence supporting the role of HF in pain processing. At last, we further expound on the relationship between pain and memory and present some unresolved issues. 展开更多
关键词 PAIN hippocampal formation ANATOMY BEHAVIOR ELECTROPHYSIOLOGY functional imaging
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