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National Repository of Grey Literature 2 records found  Search took 0.01 seconds. 
Hafnium Chloride, an Alternative Staining Reagent for Biological Electron Microscopy
 BARANYI, Magdalena Victoria
This study focuses on the staining pattern of the non-radioactive heavy metal EM stain HfCl4, used during freeze substitution specimen preparation. HfCl4 was investigated as an alternative for the prominent uranyl acetate, since uranium based materials have been placed under heavy restrictions and bans worldwide. We have found a strong HfCl4 staining pattern of microtubules in myoepithelial cells of Ixodes ricinus salivary glands. Additionally, in several samples, HfCl4 was found to completely fill the cytoplasm of the myoepithelial cells. Nonetheless, artefact formation around granulated cells was also experienced.
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Evaluation of negative stains for single particle analysis in electron microscopy
 ĎURINOVÁ, Eva
Four negative stains, hafnium chloride and europium, samarium and gadolinium nitrates, were tested in single particle electron microscopy as potential alternatives to uranyl acetate, which is recently being widely restricted for its toxicity. The new stains were applied to a structurally well-described plant photosystem I, visualized by a transmission electron microscope and classified in a single particle analysis. The quality of the stains was evaluated by the obtained resolution and ability to provide reliable structural information.
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