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 7 of 7 for “"solid nitrogen"”.
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A persistent-mode MgB₂ 0.5-T/240-mm solid-nitrogen-cooled magnet for MRI
… magnet was immersed in a volume of solid nitrogen that provided a needed thermal mass to the magnet. Temporal and spatial field homogeneity are critical parameters of MRI magnets. Thus actual fields were measured and compared with the designed values to demonstrate its acceptability …
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A "permanent" high-temperature superconducting magnet operated in thermal communication with a mass of solid nitrogen
… superconducting (HTS) magnet that is cooled by a solid heat capacitor. An apparatus was constructed to demonstrate stable operation of a permanent magnet wound with Bi2223/Ag conductor while in thermal communication with a mass of solid nitrogen. The system includes a room-temperature bore and can …
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Uji kemampuan chlorella sp. sebagai bioremidiator limbah cair tahu
… (Chamical Oxygen Demand), TSS (Total Suspended Solid), nitrogen, dan fosfor yang tinggi, yang apabila dibuang ke perairan tanpa pengolahan terlebih dahulu dapat menyebabkan pencemaran. Pengolahan limbah cair tahu dapat menggunakan mikroalga Chlorella sp. Penelitian ini bertujuan mengetahui …
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Diversity of Free-living Nitrogen Fixing Bacteria in the Badlands of South Dakota
<p>Biological Nitrogen Fixation is carried out by a highly diverse group of members of the domains Bacteria and Archaea which express a nitrogenase enzyme complex and are termed diazotrophs. The best known diazotrophs form symbiotic associations with plants, but free-living nitrogen fixing bacteria …
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A Magneto-Gravitational Neutron Trap for the Measurement of the Neutron Lifetime
… and numerical techniques. We also investigate solid nitrogen-15 as a source of UCN using neutron time-of-flight spectroscopy. We conclude with a discussion of forthcoming research and development for UCN detection and UCN sources.
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Optimization of conditions for vitrification of aqueous solutions of relevance to cryobiology
… cool a sample from ambient temperature to liquid nitrogen temperature at a fast rate. If cooling is sufficiently fast, ice-formation is inhibited. This creates a glass-like vitrified state. To optimize the probability of vitrification, current approaches were modified. Different cooling methods …
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Photoionization and excitation of free variable size van der Waals clusters in the inner shell regime
… cross sections of argon clusters and the solid. The dispersed fluorescence shows a broad molecular band centered near 280 nm. The present results are consistent with the formation of singly charged, excited moieties within the clusters, which are assigned as sources of the radiative …