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Showing 1 to 20 of 1436 for “"CR"”.
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Decomposition of Cr(OH)₃ to form active Cr₂C₃
… study was concerned with the sinterability of Cr₂C₃ powders produced by the calcination of a Cr(OH)₃ gel. The decomposition of the gel was investigated by thermogravimetric analysis, X-ray analysis and microscopic examination. Comparison was made between the size of crystallites as determined …
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Extractant Impregnated Membranes for Cr(III) and Cr(VI)
… removal and enrichment of the anionic forms of Cr(VI) and cationic forms of Cr(III), respectively. Results show Aliquat-336 and DEHPA effectively remove Cr(VI) and Cr(III) from aqueous solutions. Extraction efficiency is independent of source concentration from 1-50 ppm but is dependent upon …
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Group-invariant CR mappings
We consider group-invariant CR mappings from spheres to hyperquadrics. Given a finite subgroup $\Gamma \subset U(n)$, a construction of D'Angelo and Lichtblau yields a target hyperquadric $Q(\Gamma)$ and a canonical non-constant CR map $h_{\Gamma} : S^{2n-1}/\Gamma \to Q(\Gamma)$. For every $\Gamma …
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Compact Homogeneous Leviflat CR-Manifolds
We consider compact Leviflat homogeneous CR-manifolds. In this setting the Levi-foliation exists and we show that all its leaves are homogeneous and biholomorphic. We analyze separately the structure of orbits in complex projective spaces and parallelizable homogeneous CR-manifolds in our context. …
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Extremal Discs and CR Geometry
… of the set of extremal discs attached to a CR strictly pseudoconvex manifold of codimension two in C 4: we prove that, for such a manifold, extremal discs depend on 15 parameters, one more than the parameters needed to describe extremal discs attached to a quadric. We point out some …
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Sequestration of rabbit platelets labelled with Cr⁵¹
Thesis: B.S., Massachusetts Institute of Technology, Department of Chemistry, 1960
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Simultaneous oxidation/sulfidation of Cr-Nb alloys
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, 1994.
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Cr(VI) Generation and Stability in Drinking Water
… under revision to consider a specific level for Cr(VI), which has a proposed MCL of 10 ppb in California. Cr(VI) is a suspected carcinogen, and interconverts with the other most commonly found chromium species, Cr(III). To regulate and further understand the behavior of Cr(VI) in water systems, …
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Pseudoconformal Curvature and the Embeddability of a CR Hypersurface
… and curvature, the image of a Cauchy-Riemann, or CR, hypersurface of revolution under a CR embedding is proved to be totally geodesic. We also prove a similar statement for the image of a Kahler manifold under a holomorphic conformal embedding.
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Irradiation damage in neutron-irradiated Fe-Cr model alloys
… swelling, helium embrittlement and irradiation creep at elevated temperature (T/Tm > 0.4). However, F-M steels exhibit low-temperature irradiation-induced embrittlement that leads to a substantial decrease in toughness at lower irradiation temperature (T < 500°C) even at very low doses. The …
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Ultrashort pulse generation with solid state Cr⁴⁺:YAG laser
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, February 2003.
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Heat treatment of Co-Cr-Mo-C surgical implants.
Massachusetts Institute of Technology. Dept. of Metallurgy and Materials Science. Thesis. 1974. M.S.
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Haloethane Reactions over the Chromia Cr₂O₃ (1012) Surface
… produce ethyl fragments on the stoichiometric α-Cr₂O₃ (1012) surface by means of thermal dissociation. Ethyl iodide is dissociated giving iodine adatoms and ethyl fragments bound to surface Cr cation sites, while ethyl chloride is dissociated giving chlorine adatoms and ethyl fragments. No …
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Comparison of the Reactivity of Various Mn-Oxides With CrIIIaq: Microscopic and Spectroscopic Observations of Dissolution, Cr-sorption and Cr and Mn Redox Interactions
Chapter 1 Dynamic Processes Occurring at the Cr<sup>III</sup><sub>aq</sub> – Manganite (γ-MnOOH) Interface: Simultaneous Adsorption, Microprecipitation, Oxidation/Reduction and Dissolution The complex interaction between Cr<sup>III</sup><sub>aq</sub> and manganite (γ-MnOOH) was systematically …
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Investigation of Weldability in High-Cr Ni-base Filler Metals
High-Cr Ni-base alloys have been used in the nuclear industry for weld overlay repair of dissimilar metal welds which have been affected by primary water stress corrosion cracking. During welding, defects may result from super-solidus and sub-solidus cracking phenomena. The ability to evaluate and …
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Elevated Temperature Fatigue Behavior of 2.25 Cr-1 Mo Steel
Made available in DSpace on 2017-07-06T18:55:57Z (GMT). No. of bitstreams: 3 Raghuraman_S_MS.pdf: 60123616 bytes, checksum: f3e470db0d8155da904f0e846f2f975e (MD5) Raghuraman_S_MS_ABS.pdf: 963456 bytes, checksum: 2641591282a1687b0042df3c2a0fd1ba (MD5) license.txt: 4813 bytes, checksum: …
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A Computerized Image Analysis System for the SSNTD CR-39
Made available in DSpace on 2017-07-06T18:42:31Z (GMT). No. of bitstreams: 3 Briggs_Stephen_J_MS.pdf: 33415726 bytes, checksum: de5e59dbbe863b620fe21c74e9fd9fb8 (MD5) Briggs_Stephen_J_MS_ABS.pdf: 957747 bytes, checksum: 4750bd0e85e1075f626da29472a3bef7 (MD5) license.txt: 4813 bytes, checksum: …
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