Electron paramagnetic resonance study of the migratory ant Pachycondyla marginata abdomens.
Electron paramagnetic resonance study of the migratory ant Pachycondyla marginata abdomens.
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迁徙蚂蚁 Pachycondyla marginata 腹部的电子顺磁共振研究。
DOI：
10.1016/s0006-3495(00)76660-4
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发表时间：
2000
影响因子：
3.4
通讯作者：
D. Esquivel
中科院分区：
文献类型：
--
作者：
E. Wajnberg;D. Acosta;L. El;L. Abraçado;J. Coelho;A. Bakuzis;P. C. Morais;D. Esquivel
用电子顺磁共振研究了边缘肥大患者腹部存在的磁性物质。观察到了高自旋铁离子的Ag-≅-4.3共振和一条很窄的≅-2谱线。两条主共振宽线，一条位于G>；4.5(LF)，另一条位于G≅2(HF)区域，与生物矿化过程有关。与磁性纳米颗粒相关的这两条线HF和LF之间的共振场位移表明，存在平均包含三个单一磁铁矿基纳米颗粒的团簇结构。高频共振线宽随温度变化的分析支持∼直径为13 nm、磁能为544K的孤立磁铁矿纳米结构的模型图。这些粒子在室温下表现出超顺磁性行为。建议将这些超顺磁性粒子的性质用于蚂蚁的磁接收过程。
Electron paramagnetic resonance was used to investigate the magnetic material present in abdomens ofPachycondyla marginataants. Ag≅ 4.3 resonance of high-spin ferric ions and a very narrowg≅ 2 line are observed. Two principal resonance broad lines, one withg>4.5 (LF) and the other in the region ofg≅ 2 (HF), were associated with the biomineralization process. The resonance field shift between these two lines, HF and LF, associated with magnetic nanoparticles indicates the presence of cluster structures containing on average three single units of magnetite-based nanoparticles. Analysis of the temperature dependence of the HF resonance linewidths supports the model picture of isolated magnetite nanostructures of ∼13nm in diameter with a magnetic energy of 544K. These particles are shown to present a superparamagnetic behavior at room temperature. The use of these superparamagnetic particle properties for the magnetoreception process of the ants is suggested.
影响因子：
--
作者：
Perez, SM;Taylor, OR;Jander, R
通讯作者：
Jander, R