Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 41 for “"Electron microscopes"”.
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Innovation in electron microscopes and accessories
Thesis. 1975. M.S.--Massachusetts Institute of Technology. Alfred P. Sloan School of Management.
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Design of multi-channel spectrometers for scanning ion/electron microscopes
… known and are active areas of research both for electron energy spectroscopy and ion mass spectroscopy. Their inherent advantage of capturing the entire spectrum in parallel, promises at least an order of magnitude speed up in data acquisition times for analytical techniques such as Auger …
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Computer-aided-design of saturated magnetic lenses for electron microscopes
… magnetic objective lenses in high resolution electron microscopes. Such lenses, in present commercial electron microscopes, are energized either by conventional or superconducting coils. Very little work, however, has been reported on the use of conventional coils in saturated magnetic …
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Mathematical Challenges in Electron Microscopy
Development of electron microscopes first started nearly 100 years ago and they are now a mature imaging modality with many applications and vast potential for the future. The principal feature of electron microscopes is their resolution; they can be up to 1000 times more powerful than a visible …
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Cell death and Pro-inflammatory Cytokine Release of Rat Microglial Cells by Naegleria fowleri
… observed by a light, scanning and transmission electron microscopes. And then, the cytotoxicity of N. fowleri lysate against rat microglial cells was also observed by (51)^Cr release assay. In addition, the pro-inflammatory cytokine release from microglial cells in co-culture system was …
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Design and characterization of diamond-like carbon coated kinematic contacts for improved coupling precision and wear resistance
… in tools and instrumentation such as scanning electron microscopes (SEMs) where lubricants cannot be used. The experimental results from this experimental setup concluded that kinematic couplings coated with DLC contacts have a repeatability on the order of microns compared to steel contact …
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Interfacing Nanomaterials With Fluids and Living Biological Systems
… methods rooted in solid-state physics, such as electron microscopes, scanning probe microscopes, and microfabricated testing devices; thus, the tools and methods were difficult to incorporate "soft" materials, rooted in chemistry and biology, into the studies. Despite enormous potential of …
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Efeito de múltiplos ciclos de solubilização sub-solvus delta e envelhecimento na microestrutura e propriedades mecânicas da superliga 718
… microstructures observed by optical and scanning electron microscopes with the identification of precipitates made by the morphologies. Grain size measurements, hardness measurements and tensile tests were performed. It was observed that δ precipitation at grain boundaries occurred, keeping a …
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A system for scalable 3D visualization and editing of connectomic data
… vast amounts of imagery generated by light and electron microscopes, connectomic analysis segments the image data to define 3D regions, forming neural-networks called connectomes. Yet as the dimensions of these volumes grow from hundreds to thousands of pixels or more, connectomics is pushing …
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Dynamic environmental transmission electron microscopy
… of a dynamic environmental transmission electron microscope (DETEM) at the University of Illinois Urbana Champaign is documented in this thesis. The proposed apparatus is the first of its kind, combining the power of high-resolution electron imaging and diffraction of TEM, the time …
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Bacterial and chemical depression of pyrite in froth flotation of coal
… by binocular, reflected light, and scanning electron microscopes. The degree of dissemination of pyrite in the coal matrix was observed. Washability studies of Illinois No. 6, Pittsburgh, and Middle Kittanning coal seam samples were performed. The washability curves of these coals are …
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Phase separation spinning of porous polypropylene hollow fibers
… From observations made by optical and scanning electron microscopes, and mercury intrusion pore size distribution measurements, it was concluded that the structure of the fibers consisted of fine networks of interconnecting voids or pores. The significant majority of these pores had diameters of …
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Application of intense pulsed light for surface sterilization and food quality improvement
… study with the scanning and transmission electron microscopes indicated that Flashblast™ treated gram-negative E. coli population is more susceptible to membrane damage when compared to other microorganisms. This suggests that photoinactivation involves effects on sensitive sites (genetic …
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U-Net Network Enhancements to Facilitate Rapid Electron Microscopy Imaging for Connectomics
… techniques require an image scanned with an electron microscope at either a slow dwell time or with small pixel sizes. However, a scalable and more rapid implementation of connectome construction has not yet been realized because of the significant cost of multi-beam electron microscopes and …
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DESIGN AND SYNTHESIS OF STAINLESS-STEEL NANOPARTICLES: OXIDATION BEHAVIOR AND MORPHOLOGICAL EVOLUTION
… analysis of these NPs via transmission electron microscopes (TEM/HRTEM), structural characterization via X-ray diffraction (XRD), surface analysis via X-ray photoelectron spectroscopy (XPS), thermal property analysis via thermogravimetric analysis (TGA), organic ligand characterization …
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The taxonomy and functional anatomy of Southern African Echiurans
… the coelom have been measured with the use of electronic recording techniques and the results interpreted in relation to direct visual observation. The anatomy of the reproductive system and the process of gametogenesis in O. caudex have been investigated with light and electron microscopes. …
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Low-Energy Electron-Photon Interactions in a Scanning Electron Microscope
The interaction of free-electrons with matter and light is among the most fundamental of processes in nature. From the use of free-electrons for atomic imaging, to their use in the generation of high-intensity, tunable light in synchrotrons, the physics of unconfined electrons has wide application. …
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Synthesis and Multi-Scale Characterization of Calcium Silicate Hydrate at Multiple CaO/SiO2 Mixture Ratios
… magnetic resonance (NMR) and Transmission Electron Microscopes (TEM) were performed on C-S-H specimens. This work shed light on the significance of silicate polymerization in C-S-H on elastic and creep behavior of cement and concrete. This work might lead to developing alternative cements …
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A STUDY OF THE GROSS, MICROSCOPIC, ULTRASTRUCTURAL, AND COMPARATIVE ANATOMY AND DEVELOPMENT OF THE ARTICULAR SURFACES OF THE HUMAN SACROILIAC JOINT
… examined under the transmission and scanning electron microscopes. The sacroiliac joint angle and the relative lengths of the caudal and cephalad limbs of the joint were compared between species. On gross inspection, the sacral surface has the smooth, shiny, creamy-white appearance of normal …
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