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S I Zhadko T V Polulyakh YuAVorobyeva V A Baraboy 《Advances in Space Research (includes Cospar's Information Bulletin, Space Research Today)》1994,14(8):103-106
In series of space experiments aboard the biosatellites "Cosmos 1887", "Bion 9", the orbital stations "Salut", "Mir" and under clinostating, changes of lipid peroxidation (LPO) and antioxidation activity (AOA) of Chlorella, Haplopappus tissue culture, wheat and pea roots were determined. The changes had a complex fluctuation character; three steps of response were established: LPO decreasing accompanied by AOA increase; stabilization LPO <==> AOA balance; secondary LPO activation. Most early and highly amplitude decreasing of LPO were fixed in mitochondria. The rate of response have been increased on multicellular level of plants organization. 相似文献
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面向产品全生命周期的特征建模是现代产品建模技术的关键之一,在几何特征建模型技术中广泛采用的CSG树在描述多个领域的特征关系时存在不足之处,图状结构可以描述比树状结构更加复杂的关系。本文采用图状结构-特征图来描述特征间的关系。讨论了存储特征图的具体数据结构和定义在其上的一些基本运算。本文中所讨论的技术已被应用于轴的集成数据模型中的特征关系描述,并取得了良好的应用效果。 相似文献
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