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New Microscopy Study Findings Have Been Reported by R. Hoffmann and Co-Researchers (TEM preparation methods and influence of radiation damage on the...

July 4, 2014



New Microscopy Study Findings Have Been Reported by R. Hoffmann and Co-Researchers (TEM preparation methods and influence of radiation damage on the beam sensitive CaCO3 shell of Emiliania huxleyi)

By a News Reporter-Staff News Editor at Science Letter -- Current study results on Microscopy have been published. According to news reporting from Garching, Germany, by NewsRx journalists, research stated, "The ultrastructure of biologically formed calcium carbonate crystals like the shell of Emiliania huxleyi depends on the environmental conditions such as pH value, temperature and salinity. Therefore, they can be used as indicator for climate changes."

The news correspondents obtained a quote from the research, "However, for this a detailed understanding of their crystal structure and chemical composition is required. High resolution methods like transmission electron microscopy can provide those information on the nanoscale, given that sufficiently thin samples can be prepared. In our study, we developed sample preparation techniques for cross-section and plan-view investigations and studied the sample stability under electron bombardment. In addition to the biological material (Emiliania huxleyi) we also prepared mineralogical samples (Iceland spar) for comparison. High resolution transmission electron microscopy imaging, electron diffraction and electron energy-loss spectroscopy studies revealed that all prepared samples are relatively stable under electron bombardment at an acceleration voltage of 300 kV when using a parallel illumination."

According to the news reporters, the research concluded: "Above an accumulated dose of similar to 10(5) e/nm(2) the material - independent whether its origin is biological or geological - transformed to poly-crystalline calcium oxide."

For more information on this research see: TEM preparation methods and influence of radiation damage on the beam sensitive CaCO3 shell of Emiliania huxleyi. Micron, 2014;62():28-36. Micron can be contacted at: Pergamon-Elsevier Science Ltd, The Boulevard, Langford Lane, Kidlington, Oxford OX5 1GB, England. (Elsevier - www.elsevier.com; Micron - www.elsevier.com/wps/product/cws_home/475)

Our news journalists report that additional information may be obtained by contacting R. Hoffmann, TUM, Walter Schottky Inst, D-85748 Garching, Germany. Additional authors for this research include A.S. Wochnik, S.B. Betzler, S. Matich, E. Griesshaber, W.W. Schmahl and C. Scheu (see also Microscopy).

Keywords for this news article include: Europe, Germany, Garching, Microscopy

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Science Letter


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