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Showing 1 to 20 of 34 for “"Chromium (III)"”.

  1. Optical reflectance spectra of chromium (III) in MgO-ss

    Montgomery, Thomas SpencerUniversity of Missouri at Rolla2016

    … coordination site of the transition-metal ion, chromium, was investigated in a MgO host lattice. The chromium ion incorporated into poly-crystalline MgO by quenching from elevated temperatures allowed investigation of a single crystalline phase, MgO-solid solution (ss). The chromium ion was …

    must-thes Repository record

  2. Halocarbon Reactions on the Chromium (III) Oxide (101̲2) Surface

    York, Steven C.Virginia Tech1999

    A nearly stoichiometric, (1×1) Cr₂O₃ (101̲2) surface was prepared from a single crystal of α-Cr₂O₃. The five-coordinate cations exposed at the stoichiometric surface dissociatively adsorb molecular oxygen to form a (1×1), terminating chromyl (Cr=O) layer that is stable to >1100 K. TDS and AES were …

    vt Repository record

  3. Environmental fate and effects of chromium(III) and (IV) investigated using electroanalytical chemistry.

    Comber, Michael Henry Irvin1993

    … , during the electrochemical determination of chromium(III) or (VI) was developed. This media exchange system was used to investigate the effect of pH on the complexation and pre-concentration of chromium separately from the production of the electrochemical signal. While the complexation and …

    plymouth Repository record

  4. A Comparison of Gas Chromatographic Properties of Chromium (Iii) and Iron (Iii) Tris (Ethylenediamine) Exchanged Montmorillonites

    Beck, Harold D.

    … of tris(ethylenediamine) complexes of chromium (III) and iron (III) were studied and compared. Retention mechanisms of microsieving and surface adsorption are compared and discussed. The effects of percentage of substitution and heating on d₀₀₁-spacing and surface area are compared. The …

    mo-state Repository record

  5. The Magneto Circular Dichroism of Octahedral Chromium(iii) in Ruby and of Tetrahedral Cobalt(ii) Halides

    Spencer, John ArthurUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-09T17:36:26Z (GMT). No. of bitstreams: 1 7000989.pdf: 4318738 bytes, checksum: 9f9280fcca1ac59b6558f256076f598f (MD5) Previous issue date: 1969

    uiuc Repository record

  6. Chromium (III), Titanium (III), and Vanadium (IV) sensitization of rare earth complexes for luminescent solar concentrator applications

    Thompson, Nicholas JohnMassachusetts Institute of Technology2011

    … the visible spectrum. Transition metals such as chromium (Cr), titanium (Ti), and vanadium (V) have broadband absorption covering the visible and near-infrared and can efficiently sensitize neodymium and ytterbium through a non-radiative energy transfer process. Chromium, titanium, and vanadium …

    mit Repository record

  7. The Solid Phase Isomerization of Trans-Dichlorotetramine Cobalt(iii) Iudate Dihydrate and Racemization of 1-Cis-Dichloro Bis(ethylenediamine) Chromium(iii) chloride.hydrate

    Lemay, Harold Eugene, Jr.University of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-09T17:35:40Z (GMT). No. of bitstreams: 1 6706657.pdf: 6790185 bytes, checksum: 21b80dd0374691859f76d9293ef66373 (MD5) Previous issue date: 1966

    uiuc Repository record

  8. I. Thermodynamic Data for Adducts of Phenol With Lewis Bases. Ii. Coordination Compounds of Nickel(ii) and Chromium(iii) With Lewis Bases

    Joesten, Melvin DuaneUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-05T19:38:08Z (GMT). No. of bitstreams: 1 6303273.pdf: 4365894 bytes, checksum: 0ad93364ffdf82b9937d21859cf08df6 (MD5) Previous issue date: 1962

    uiuc Repository record

  9. Chromium (III) complexes and their relationship to the glucose tolerance factor : a thesis presented in partial fulfillment of the requirements for the degree of Master of Science in Chemistry at Massey University

    Cooper, Juan Anton1982

    massey

  10. Mineral tanning mechanisms: a fundamental study

    Lampard, Graham SUniversity of Northampton2000

    … cost are applied, the useflul options reduce to chromium ([III) the benchmark orto titanium (IV) zucomum ([V) iron (II/III) and aluminium ([II) For mainly environmental reasons, alternative tanning agents to chromium are needed, However. none so far investigated match the all round properties …

    northampton Repository record

  11. Physical Chemical Studies of Some Complex Inorganic Compounds: I. The Kinetics of Aquation of Cis-Dichloro-Bis-(ethylenediamine)-Chromium(iii) Ion. Ii. The Stereochemistry of Some Triethylenetetramine Complexes. iii.the Reduction of a Nitro Group Coordinated to Platinum

    Selbin, JoelUniversity of Illinois at Urbana-Champaign2014

    Made available in DSpace on 2014-12-05T19:36:48Z (GMT). No. of bitstreams: 1 0025279.pdf: 6920085 bytes, checksum: 6859dbd75e46fa6b0d83bc8cd807eede (MD5) Previous issue date: 1957

    uiuc Repository record

  12. Investigations in the chemistry of transition metal complexes containing the tripodal amine β,β′,β″-triaminotriethylamine

    Zipp, Sybil Goodkin

    … processing of rubber.</p> <p>Complexes of cobalt(III) with triaminotriethylamine and triethylenetetramine have been shown to be effective in promoting the cleavage of N-terminal amino acid residues from peptides. Chromium(III) complexes of amines and polyamines, both monomers and dimers, are …

    binghamton Repository record

  13. Differences of DNA-Transcription Factor Interactions Following Chromium Exposure

    Mintz, Kathryn Louise

    … active proteins. It is known that reduction of chromium(VI) to chromium(III) creates species such as chromium(V) and chromium(IV) which interact with and damage DNA. An oxidative event, such a chromium(VI) reduction to chromium(III) could allow a crosslinking of protein-bound DNA. Redox values …

    montana-tech Repository record

  14. Differences of DNA-Transcription Factor Interactions Following Chromium Exposure

    Mintz, Kathryn Louise

    … active proteins. It is known that reduction of chromium(VI) to chromium(III) creates species such as chromium(V) and chromium(IV) which interact with and damage DNA. An oxidative event, such a chromium(VI) reduction to chromium(III) could allow a crosslinking of protein-bound DNA. Redox values …

    montana Repository record

  15. ΣΥΝΘΕΣΗ ΚΑΙ ΜΕΛΕΤΗ ΤΗΣ ΔΟΜΗΣ ΕΝΩΣΕΩΝ ΣΥΝΑΡΜΟΓΗΣ 3-ΑΡΟΥΛΟΔΙΘΕΙΟ- ΚΑΡΒΑΖΙΔΙΚΩΝ LIGANDS ΜΕ ΤΑ ΙΟΝΤΑ ΝΙ(ΙΙ), CO(II), ZN(II) ΚΑΙ CR(II)

    Τζαβέλλας, ΛέανδροςΑριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης (ΑΠΘ)1991

    … OF NICKEL (II), COBALT (II), ZINC (II) AND CHROMIUM (III), HAVE BEEN PREPAREDAND CHARACTERIZED BY ELEMENTAL ANALYSES, MOLECULAR WEIGHT DETERMINATION, MAGNETIC AND SPECTROSCOPIC TECHNIQUES. THE SIX COORDINATED POLYMERIC COMPLEXES (NIL2)N ARE OCTAHEDRAL AND CONSIDERED TO INVOLVE BRIDGING …

    greece Repository record

  16. Studies on the biotransformation of chromium (VI) by methane oxidising bacteria.

    Hamad, Bubaker M D.Sheffield Hallam University (United Kingdom).2009

    … Cr(VI), the highest oxidation state of the metal chromium, is widely used in various industries, and is extremely toxic to animals and humans. Utilisation of chromium (Cr) reducing microbes and their products can enhance the efficiency of the process of detoxification of Cr(VI) to Cr(III).This …

    sheffield-hallam Repository record

  17. NMR Linebroadening and Contact Shift Studies of Transition Metal Complexes in Nonaqueous Solvents.

    Harris, Marvin Eugene, Jr

    … (DMSO) +3 in tris (ethylenediamine) chromium(III) (Cr(en)3 +3)-DMSO solutions were conducted between 20° and 90°C. The resulting data were interpreted using the Swift-Connick relationships. The dominant contribution to linebroadening in the temperature range of 20° - 50°C was a …

    uab Repository record

  18. Preliminary Experiments on Photo-Electro Catalytic Oxidation of Recalcitrant Organic Compounds Dissolved in Water

    Elsegeiny, Mohammed A

    … degradation's were accomplished using doped chromium titanium dioxide photocatalyst, which degraded significantly larger amounts of organics compared with pure titanium dioxide. Techniques used to accomplish the increased photo-reactivity were doping chromium (III) ion into titanium dioxide …

    uno Repository record

  19. An investigation into the active sites in co-reactants for carbonless copying paper

    Daley, Robert AnthonyUniversity of Central Lancashire1999

    … in the ligand substitution reactions of Chromium (III) chloride.

    cent-lancashire Repository record

  20. Determination of chromium in natural waters by flow injection inductively coupled plasma emission spectrometry.

    Cox, Alan G.Sheffield Hallam University (United Kingdom).1992

    … approach for the accurate determination of chromium species in river waters is developed in this thesis. This is based on the use of alumina micro columns for in situ sampling and storage, followed by a simple introduction of the in situ samples to an inductively coupled plasma emission …

    sheffield-hallam Repository record

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