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Involvement of calcium and calmodulin in Toxoplasma gondii tachyzoite invasion.
The tachyzoite of Toxoplasma gondii must successfully invade a host cell before it can replicate. Depletion of the Ca2+ in the external medium (EGTA) reduced tachyzoite invasion, suggesting that theExpand
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Evaluation of the Ca/P concentration ratio in hydroxyapatite by STEM-EDXS: influence of the electron irradiation dose and temperature processing
Biomaterials used in dental and orthopaedic surgery to fill bony loss and to coat prostheses are either of natural or synthetic origin. Amongst these biomaterials, hydroxyapatites (HA) offer goodExpand
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Subcellular calcium localization in Toxoplasma gondii by electron microscopy and by X‐ray and electron energy loss spectroscopies
The localization of calcium in Toxoplasma gondii tachyzoites was studied at the ultrastructural level, with a cytochemical pyroantimonate precipitation method (PA) and controlled by EGTA chelatingExpand
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Tachyzoite calcium changes during cell invasion by Toxoplasma gondii
Abstract The invasion of host cells by the obligate intracellular protozoan parasite Toxoplasma gondii is calcium dependent. We have identified two calcium storage areas in tachyzoites, theExpand
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TEM study of electrodeposited Ni/Cu multilayers in the form of nanowires
Abstract Ni/Cu multilayers were electrodeposited within nanopores of polycarbonate membranes. Morphology of the obtained nanowires, which are 60 ∼ 80 nm in diameter and ∼5 μm in length, has beenExpand
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Reverse Engineering of Integrated Circuits using Cross-Sectional Transmission Electron Microscopy—A Morphological and Structural Study
Results are presented on reverse engineering of the integrated circuits (N-MOS device) using transmission electron microscopy (TEM). A modified technique has been described for preparation ofExpand
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Integration of dense HA rods into cortical bone.
HA ceramics are daily used in human surgery for bone healing partly due to their ability to integrate into bone. They are generally used under a macroporous form. The behaviour of dense HA afterExpand
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[Femoropatellar osteoarthritis treated by prosthesis. Retrospective study of 50 implants].
MATERIAL AND METHODS 51 prosthesis were performed in 47 patients and were studied in order to assess long term results. One patient was lost for follow up. The diagnosis was: primitive arthritis inExpand
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[Treatment of Crohn's disease with azathioprine or 6-mercaptopurine. Retrospective study of 126 cases].
Over the past 15 years (1974-1989), 126 patients with Crohn's disease received azathioprine (n = 123) or 6-mercaptopurine (n = 3). Seven patients were lost of follow-up during the first month andExpand
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X‐ray microanalysis of organic thin sections in TEM using an UTW Si(Li) detector: Comparison of quantification methods
We compared Hall's peak to continuum ratio method with a peak ratio method in order to quantify light elements (C, N, and O) in organic specimens as a model for biological thin sections. X‐rayExpand
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