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Sample records for rhodium 89

  1. EVIDENCE FOR CO DISSOCIATION ON RHODIUM SURFACES

    SciTech Connect

    Castner, D.G.; Dubois, L.H.; Sexton, B.A.; Somorjai, G.A.

    1980-06-01

    Carbon monoxide adsorbs molecularly on rhodium surfaces at 300K, but if the rhodium samples are heated in the presence of carbon monoxide, there is evidence for carbon-oxygen bond breaking at step and/or defect sites. The effects of step and defect site density, subsurface oxygen concentration, and oxygen dissolution into the rhodium lattice on CO dissociation are discussed.

  2. Rhodium Nanoparticles for Ultraviolet Plasmonics

    NASA Astrophysics Data System (ADS)

    Watson, Anne; Zhang, Xiao; Alcaraz de La Osa, Rodrigo; Sanz, Juan; Fernandez, Francisco; Moreno, Fernando; Finkelstein, Gleb; Liu, Jie; Everitt, Henry

    We introduce the non-oxidizing catalytic noble metal rhodium for ultraviolet (UV) plasmonics. 8 nm tripod-shaped planar Rh nanoparticles (NPs) were synthesized by a modified polyol reduction chemistry. They have a calculated local surface plasmon resonance (LSPR) near 330 nm. To illustrate the UV plasmonic performance of Rh, p-aminothiophenol (PATP) was attached to the Rh NPs and enhanced Raman and fluorescence were observed upon UV illumination. The PATP Raman spectra produced by UV and visible excitation were respectively in and out of resonance with the Rh NP LSPR. This clearly revealed resonant spectral enhancement in the UV and accelerated photo-damage produced by intense local fields concentrated near the plasmonic Rh NPs. Simultaneously, surface enhanced fluorescence increased during 13 minutes of resonant UV illumination, providing direct evidence of charge transfer from the Rh NPs. The combined local field enhancement and charge transfer demonstrate essential steps toward plasmonically-enhanced ultraviolet photocatalysis. Due to its high chemical stability and strong plasmonic effect, Rh nanoparticles could find wide applications in UV plasmonics.

  3. Rhodium(i), rhodium(iii) and iridium(iii) carbaporphyrins.

    PubMed

    Adiraju, Venkata A K; Ferrence, Gregory M; Lash, Timothy D

    2016-09-21

    Treatment of a benzocarbaporphyrin with [Rh(CO)2Cl]2 in refluxing dichloromethane gave a rhodium(i) dicarbonyl complex, and further reaction in refluxing pyridine afforded an organometallic rhodium(iii) derivative. The carbaporphyrin also reacted with [Ir(COD)Cl]2 and pyridine in refluxing p-xylene to generate a related iridium(iii) compound. These novel metalated porphyrinoids retained strongly diatropic characteristics and were fully characterized by XRD. PMID:27529466

  4. Superconductivity in zirconium-rhodium alloys

    NASA Technical Reports Server (NTRS)

    Zegler, S. T.

    1969-01-01

    Metallographic studies and transition temperature measurements were made with isothermally annealed and water-quenched zirconium-rhodium alloys. The results clarify both the solid-state phase relations at the Zr-rich end of the Zr-Rh alloy system and the influence upon the superconducting transition temperature of structure and composition.

  5. 103Rh NMR spectroscopy and its application to rhodium chemistry.

    PubMed

    Ernsting, Jan Meine; Gaemers, Sander; Elsevier, Cornelis J

    2004-09-01

    Rhodium is used for a number of large processes that rely on homogeneous rhodium-catalyzed reactions, for instance rhodium-catalyzed hydroformylation of alkenes, carbonylation of methanol to acetic acid and hydrodesulfurization of thiophene derivatives (in crude oil). Many laboratory applications in organometallic chemistry and catalysis involve organorhodium chemistry and a wealth of rhodium coordination compounds is known. For these and other areas, 103Rh NMR spectroscopy appears to be a very useful analytical tool. In this review, most of the literature concerning 103Rh NMR spectroscopy published from 1989 up to and including 2003 has been covered. After an introduction to several experimental methods for the detection of the insensitive 103Rh nucleus, a discussion of factors affecting the transition metal chemical shift is given. Computational aspects and calculations of chemical shifts are also briefly addressed. Next, the application of 103Rh NMR in coordination and organometallic chemistry is elaborated in more detail by highlighting recent developments in measurement and interpretation of 103Rh NMR data, in relation to rhodium-assisted reactions and homogeneous catalysis. The dependence of the 103Rh chemical shift on the ligands at rhodium in the first coordination sphere, on the complex geometry, oxidation state, temperature, solvent and concentration is treated. Several classes of compounds and special cases such as chiral rhodium compounds are reviewed. Finally, a section on scalar coupling to rhodium is provided. PMID:15307053

  6. Cyclopentadiene-mediated hydride transfer from rhodium complexes.

    PubMed

    Pitman, C L; Finster, O N L; Miller, A J M

    2016-07-12

    Attempts to generate a proposed rhodium hydride catalytic intermediate instead resulted in isolation of (Cp*H)Rh(bpy)Cl (1), a pentamethylcyclopentadiene complex, formed by C-H bond-forming reductive elimination from the fleeting rhodium hydride. The hydride transfer ability of diene 1 was explored through thermochemistry and hydride transfer reactions, including the reduction of NAD(+). PMID:26949917

  7. Contrast and dose with molybdenum, molybdenum-rhodium, and rhodium-rhodium target-filter combinations in mammography

    SciTech Connect

    Gingold, E.L.; Wu, Xizeng; Barnes, G.T.

    1997-03-01

    Molybdenum target-molybdenum filter (Mo-Mo) source assemblies are commonly used for screen-film mammography and produce spectra rich in bremsstrahlung between 15 and 20 keV, and molybdenum characteristic x-rays (K{sub {alpha}} = 17.5 keV and K{sub {beta}} = 19.6 keV) that are, optimal for imaging a large segment of patients. With the normal variability of breast size and tissue composition that occurs in the population, Mo-Mo spectra are not always optimal, however. Particularly for thick, fibroglandular breast tissue, higher energy spectra are required, and are achieved to a limited degree by operating Mo-Mo tubes at higher tube potentials. At these higher tube potentials (28-31 kVp), the spectrum exiting the breast has a large contribution from bremsstrahlung of more than 23 keV. Most of the lower energy photons, including the molybdenum characteristic x-rays, are absorbed and result in a higher average tissue dose than is necessary. Incident spectra with x-ray energies in the 20-23 keV range are preferable. Such spectra have been realized with higher atomic number materials, such as rhodium (Rh), used for the anode or k-edge filter. The higher K-absorption edge of rhodium allows transmission of bremsstrahlung in the 20-23.2 keV range, and at a given kilovoltage the Rh-Rh combination results in a more penetrating beam than either Mo-Mo or Mo-Rh (molybdenum x-ray tube anode with rhodium K-edge filter) because of the difference in energy between the rhodium and molybdenum characteristic x-rays. The greater penetrating power of these spectra results in decreased entrance skin exposure and average glandular dose to the breast than with the conventional Mo-Mo spectra. However, associated with this can be a reduction in subject contrast in the mammogram. The objective of this study was to compare the contrast and dose produced with the three source assemblies as a function of x-ray tube potential, breast thickness, and breast parenchymal composition.

  8. Rhodium oxides in unusual oxidation states

    NASA Astrophysics Data System (ADS)

    Reisner, Barbara Alice

    Mixed valence RhIII/RhIV oxides have been proposed as a promising class of candidate compounds for superconductivity. Unfortunately, it is difficult to stabilize rhodates with a formal oxidation state approaching RhIV, as other techniques used for the synthesis of rhodium. oxides favor the most commonly observed formal oxidation state, RhIII. One technique which has been used to stabilize metal oxides in high formal oxidation states is crystallization from molten hydroxides. This thesis explores the use of molten hydroxides to enhance the reactivity of rhodium oxides in order to synthesize rhodates with high formal oxidation states. K0.5RhO2, Rb0.2RhO2, and CsxRhO2 were synthesized from pure alkali metal hydroxides. All crystallized with a previously unobserved polytype in the alkali metal rhodate system. Due to the low activity of dissolved oxygen species in LiOH and NaOH, LiRhO2 and NaRhO2 cannot be crystallized. The formal oxidation state of rhodium in AxRhO2 (A = K, Rb, Cs) is a function of the alkali metal hydroxide used to synthesize these oxides. These materials exhibit remarkable stability for layered metal oxides containing the heavier alkali metals, but all phases are susceptible to intercalation by water. The synthesis, structural characterization, magnetic susceptibility, and reactivity of these oxides are reported. Sr2RhO4 and a new rhodate were crystallized from a KOH-Sr(OH)2 flux. The synthesis and characterization of these materials is reported. Efforts to substitute platinum for rhodium in Sr 2RhO4 are also discussed. Mixed alkali metal-alkaline earth metal hydroxide fluxes were used to crystallize LiSr3RhO6, and NaSr3RhO 6. The synthesis of LiSr3RhO6 and NaSr3RhO 6 represents the first example of the stabilization of a rhodium oxide with a formal oxidation state approaching RhV. X-ray diffraction, electron beam microprobe analysis, thermogravimetric analysis, potentiometric titrations, X-ray photoelectron spectroscopy, and magnetic susceptibility

  9. Strontium-89 Chloride

    MedlinePlus

    ... ask your doctor or pharmacist for more information.Strontium-89 chloride is in a class of drugs known as radioisotopes. It delivers radiation to cancer sites and ultimately decreases bone pain. The length of treatment depends on the ...

  10. Chemical Posttranslational Modification with Designed Rhodium(II) Catalysts.

    PubMed

    Martin, S C; Minus, M B; Ball, Z T

    2016-01-01

    Natural enzymes use molecular recognition to perform exquisitely selective transformations on nucleic acids, proteins, and natural products. Rhodium(II) catalysts mimic this selectivity, using molecular recognition to allow selective modification of proteins with a variety of functionalized diazo reagents. The rhodium catalysts and the diazo reactivity have been successfully applied to a variety of protein folds, the chemistry succeeds in complex environments such as cell lysate, and a simple protein blot method accurately assesses modification efficiency. The studies with rhodium catalysts provide a new tool to study and probe protein-binding events, as well as a new synthetic approach to protein conjugates for medical, biochemical, or materials applications. PMID:27586326

  11. Structural properties of small rhodium clusters

    SciTech Connect

    Soon, Yee Yeen; Yoon, Tiem Leong; Lim, Thong Leng

    2015-04-24

    We report a systematic study of the structural properties of rhodium clusters at the atomistic level. A novel global-minimum search algorithm, known as parallel tempering multicanonical basin hopping plus genetic algorithm (PTMBHGA), is used to obtain the geometrical structures with lowest minima at the semi-empirical level where Gupta potential is used to describe the atomic interaction among the rhodium atoms. These structures are then re-optimized at the density functional theory (DFT) level with exchange-correlation energy approximated by Perdew-Burke-Ernzerhof (PBE) generalized gradient approximation (GGA). The structures are optimized for different spin multiplicities. The ones with lowest energies will be taken as ground-state structures. In most cases, we observe only minor changes in the geometry and bond length of the clusters as a result of DFT-level re-optimization. Only in some limited cases, the initial geometries obtained from the PTMBHGA are modified by the re-optimization. The variation of structural properties, such as ground-state geometry, symmetry and binding energy, with respect to the cluster size is studied and agreed well with other results available in the literature.

  12. Low gravity containerless processing of immiscible gold rhodium alloys

    NASA Technical Reports Server (NTRS)

    Andrews, J. Barry

    1986-01-01

    Under normal one-g conditions immiscible alloys segregate extensively during solidification due to sedementation of the more dense of the immiscible liquid phases. However, under low-g conditions it should be possible to form a dispersion of the two immiscible liquids and maintain this dispersed structure during solidification. Immiscible (hypermonotectic) gold-rhodium alloys were processed in the Marshall Space Flight Center 105 meter drop tube in order to investigate the influence of low gravity, containerless solidification on their microstructure. Hypermonotectic alloys composed of 65 atomic % rhodium exhibited a tendency for the gold rich liquid to wet the outer surface of the containerless processed samples. This tendency led to extensive segregation in several cases. However, well dispersed microstructures consisting of 2 to 3 micron diameter rhodium-rich spheres in a gold-rich matrix were produced in 23.4 atomic % rhodium alloys. This is one of the best dispersions obtained in research on immiscible alloy-systems to data.

  13. Rhodium-Catalyzed Enantioselective Arylation of Aliphatic Imines.

    PubMed

    Kato, Naoya; Shirai, Tomohiko; Yamamoto, Yasunori

    2016-06-01

    Chiral rhodium(I)-catalyzed highly enantioselective arylation of aliphatic N-sulfonyl aldimines with arylboronic acids has been developed. This transformation is achieved by the use of a rhodium/bis(phosphoramidite) catalyst to give enantiomerically enriched α-branched amines (up to 99 % ee). In addition, this system enables efficient synthesis of (+)-NPS R-568 and Cinacalcet which are calcimimetic agents. PMID:27119262

  14. Strontium-89 Chloride

    MedlinePlus

    ... doctor if you have or have ever had bone marrow disease, blood disorders, or kidney disease.you should know that strontium-89 chloride may interfere with the normal menstrual cycle (period) in women and may stop sperm production in men. However, ...

  15. General Route to Cyclobutadiene Rhodium Complexes.

    PubMed

    Perekalin, Dmitry S; Shvydkiy, Nikita V; Nelyubina, Yulia V; Kudinov, Alexander R

    2015-11-01

    Cyclobutadiene rhodium complexes bear high potential for applications in organometallic synthesis and catalysis. We have found that the cyclobutadiene complexes with substitutionally labile p-xylene ligands [(C4 R4 )Rh(p-xylene)](+) can be synthesized in one step from the commercially available bis(ethylene) complex [{(C2 H4 )2 RhCl}2 ], p-xylene, and internal alkynes. The replacement of p-xylene by various ligands provides a general access to other [(C4 R4 )Rh] compounds, such as [(C4 R4 )RhCl]x , [(C4 R4 )RhL3 ](+) , [(C4 R4 )Rh(C5 H5 )], and [(C4 R4 )Rh(arene)](+) . Complex [(C4 Et4 )Rh(p-xylene)](+) also catalyzes an unusual cycloisomerization of a 1,11-dien-6-yne into a bicyclic diene. PMID:26387565

  16. Aberration corrected STEM of iron rhodium nanoislands

    NASA Astrophysics Data System (ADS)

    McLaren, M. J.; Hage, F. S.; Loving, M.; Ramasse, Q. M.; Lewis, L. H.; Marrows, C. H.; Brydson, R. M. D.

    2014-06-01

    Iron-rhodium (FeRh) nanoislands of equiatomic composition have been analysed using scanning transmission electron microscopy (STEM) electron energy loss spec-troscopy(EELS) and high angle annular dark field (HAADF) techniques. Previous magne-tometry results have lead to a hypothesis that at room temperature the core of the islands are antiferromagnetic while the shell has a small ferromagnetic signal. The causes of this effect are most likely to be a difference in composition at the edges or a strain on the island that stretches the lattice and forces the ferromagnetic transition. The results find, at the film-substrate interface, an iron-rich layer ~ 5 Å thick that could play a key role in affecting the magnetostructural transition around the interfacial region and account for the room temperature ferromagnetism.

  17. Light induced catalytic intramolecular hydrofunctionalization of allylphenols mediated by porphyrin rhodium(iii) complexes.

    PubMed

    Liu, Xu; Wang, Zikuan; Fu, Xuefeng

    2016-09-14

    Catalytic intramolecular hydrofunctionalization of allylphenols to heterocyclic compounds mediated by rhodium(iii) porphyrin complexes was described. The Wacker-type intermediate β-heterocyclic alkyl rhodium complex was independently synthesized and crystallized. PMID:27482840

  18. STS-89 Mission Insignia

    NASA Technical Reports Server (NTRS)

    1998-01-01

    In the STS-89 crew insignia, the link between the United States and Russia is symbolically represented by the Space Shuttle Endeavour and Russia's Mir Space Station orbiting above the Bering Strait between Siberia and Alaska. The success of the joint United States-Russian missions is depicted by the Space Shuttle and Mir colored by the rising sun in the background. A shadowed representation of the International Space Station (ISS) rising with the sun represents the future program for which the Shuttle-Mir missions are prototypes. The inside rim of the insignia describes the outline of the number eight representing STS-89 as the eighth Shuttle/Mir docking mission. The nine stars represent the nine joint missions to be flown of the program and when combined with the number eight in the rim, reflect the mission number. The nine stars also symbolize the children of the crew members who will be the future beneficiaries of the joint development work of the space programs of the two countries. Along the rim are the crew members' names with David A. Wolf's name on the left and Andrew S. W. Thomas' name on the right, the returning and upgoing cosmonaut guest researcher crew members. In between and at the bottom is the name of Salizan S. Sharipov, payload specialist representing Russian Space Agency (RSA), in Cyrillic alphabet. The other crew members are Terrence W. Wilcutt, commander; Joe F. Edwards, Jr., pilot; and mission specialists Michael P. Anderson, Bonnie J. Dunbar, and James F. Reilly. The red, white and blue of the rim reflect the colors of the American and Russian flags which are also represented in the rim on either side of the joined spacecraft.

  19. Size control of rhodium particles of silica-supported catalysts using water-in-oil microemulsion

    NASA Astrophysics Data System (ADS)

    Kishida, Masahiro; Hanaoka, Toshiaki; Kim, Won Young; Nagata, Hideo; Wakabayashi, Katsuhiko

    1997-11-01

    Effects of components of water-in-oil microemulsions on rhodium particle sizes of silica-supported rhodium catalysts were investigated in the catalyst preparation method using microemulsion. In the case of the microemulsion of polyoxyethylene(23)dodecyl ether/ n-alcohols/RhCl 3 aq., the rhodium particle size increased from 3.4 to 5.0 nm as the specific permittivity of the organic solvent increased. The chain length of hydrophilic group of polyoxyethylene- p-nonylphenyl ether ( n = 5 to 15) employed as surfactants had an effect on the rhodium particle size where the rhodium size ranged between 2.0 and 3.6 nm. The rhodium particle size was 1.5 nm in the case of sodium bis(2-ethylhexyl) sulfocuccinate and this value was found to be the smallest. These results could be interpreted in terms of the adsorption of the surfactant on rhodium-hydrazine particle surface.

  20. Superconductivity and magnetism of complex rhodium borides

    NASA Astrophysics Data System (ADS)

    Burkhanov, G. S.; Lachenkov, S. A.; Khlybov, E. P.; Dankin, D. G.; Kulikova, L. F.

    2013-05-01

    A number of complex rhodium borides with an LuRu4B4-type structure is synthesized; these are DyRh4B4 (samples HP) with T c ≈ 4.5 K, DyRh3.8Ru0.2B4 (samples AM) with T c ≈ 4.5 K, Dy0.8Er0.2Rh3.8Ru0.2B4 (samples AM) with T c ≈ 6.3 K, and HoRh3.8Ru0.2B4 (samples AM) with T c ≈ 6.0 K. The temperature dependence of upper critical field B c2( T) for all the samples under study exhibits an anomalous behavior. In all cases, the curve B c2( T) demonstrates a point of inflection, after which the curve deviates from the classical parabolic law abruptly upward for DyRh4B4 and DyRh3.8Ru0.2B4 (the 1st group of compounds) and downward for the Dy0.8Er0.2Rh3.8Ru0.2B4 and HoRh3.8Ru0.2B4 compounds (the 2nd group). These compounds are found to be characterized by of the following phase transitions: paramagnet → ferrimagnet → superconductor (retained ferrimagnetism) → antiferromagnet (retained superconductivity). The latter transition to the antiferromagnetic state occurs only in the compounds of the 1st group. It is found that, for the DyRh3.8Ru0.2B4 compound, no traditional Meissner effect is observed but the so-called Volleben effect (paramagnetic Meissner effect) takes place.

  1. Discovery of rubidium, strontium, molybdenum, and rhodium isotopes

    SciTech Connect

    Parker, A.M.; Thoennessen, M.

    2012-07-15

    Currently, 31 rubidium, 35 strontium, 35 molybdenum, and 38 rhodium isotopes have been observed and the discovery of these isotopes is described here. For each isotope a brief synopsis of the first refereed publication, including the production and identification method, is presented.

  2. Electronic and magnetic properties of small rhodium clusters

    SciTech Connect

    Soon, Yee Yeen; Yoon, Tiem Leong; Lim, Thong Leng

    2015-04-24

    We report a theoretical study of the electronic and magnetic properties of rhodium-atomic clusters. The lowest energy structures at the semi-empirical level of rhodium clusters are first obtained from a novel global-minimum search algorithm, known as PTMBHGA, where Gupta potential is used to describe the atomic interaction among the rhodium atoms. The structures are then re-optimized at the density functional theory (DFT) level with exchange-correlation energy approximated by Perdew-Burke-Ernzerhof generalized gradient approximation. For the purpose of calculating the magnetic moment of a given cluster, we calculate the optimized structure as a function of the spin multiplicity within the DFT framework. The resultant magnetic moments with the lowest energies so obtained allow us to work out the magnetic moment as a function of cluster size. Rhodium atomic clusters are found to display a unique variation in the magnetic moment as the cluster size varies. However, Rh{sub 4} and Rh{sub 6} are found to be nonmagnetic. Electronic structures of the magnetic ground-state structures are also investigated within the DFT framework. The results are compared against those based on different theoretical approaches available in the literature.

  3. In vitro permeation of platinum and rhodium through Caucasian skin.

    PubMed

    Franken, A; Eloff, F C; Du Plessis, J; Badenhorst, C J; Jordaan, A; Du Plessis, J L

    2014-12-01

    During platinum group metals (PGMs) refining the possibility exists for dermal exposure to PGM salts. The dermal route has been questioned as an alternative route of exposure that could contribute to employee sensitisation, even though literature has been focused on respiratory exposure. This study aimed to investigate the in vitro permeation of platinum and rhodium through intact Caucasian skin. A donor solution of 0.3mg/ml of metal, K2PtCl4 and RhCl3 respectively, was applied to the vertical Franz diffusion cells with full thickness abdominal skin. The receptor solution was removed at various intervals during the 24h experiment, and analysed with high resolution ICP-MS. Skin was digested and analysed by ICP-OES. Results indicated cumulative permeation with prolonged exposure, with a significantly higher mass of platinum permeating after 24h when compared to rhodium. The mass of platinum retained inside the skin and the flux of platinum across the skin was significantly higher than that of rhodium. Permeated and skin retained platinum and rhodium may therefore contribute to sensitisation and indicates a health risk associated with dermal exposure in the workplace. PMID:25084315

  4. Ring Expansion and Rearrangements of Rhodium(II) Azavinyl Carbenes

    PubMed Central

    Selander, Nicklas; Worrell, Brady T.

    2013-01-01

    An efficient, regioselective and convergent method for the ring expansion and rearrangement of 1-sulfonyl-1,2,3-triazoles under rhodium(II)-catalyzed conditions is described. These denitrogenative reactions form substituted enaminone and olefin-based products, which in the former case can be further functionalized to unique products rendering the sulfonyl triazole traceless. PMID:23161725

  5. Internal stresses and structure of electrolytic films of ruthenium, rhodium, and palladium

    SciTech Connect

    Medyanik, V.N.

    1986-01-01

    Films of ruthenium, rhodium, and palladium are used as targets in nuclear physics experiments in the form of metal foils. The authors investigate how the current density and the concentration of metal in the electrolyte influence the internal stresses, the grain size, and the texture of electrolytic films of ruthenium, rhodium, and palladium. The grain size of rhodium and palladium films increases with the current density, but for ruthenium there is no exact relationship. The increase in grain size in films of rhodium and palladium leads to a reduction in the internal stresses.

  6. Rhodium catalysed hydroformylation of alkenes using highly fluorophilic phosphines.

    PubMed

    Adams, Dave J; Bennett, James A; Cole-Hamilton, David J; Hope, Eric G; Hopewell, Jonathan; Kight, Jo; Pogorzelec, Peter; Stuart, Alison M

    2005-12-21

    Highly fluorophilic phosphines incorporating at least one aromatic ring containing two directly attached perfluoroalkyl groups have been synthesised, their partition coefficients (organic phase : fluorous phase) measured and their electronic properties probed using (1)J(PtP) data for their trans-[PtCl(2)L(2)] complexes. These phosphines have been used as modifying ligands for the rhodium catalysed hydroformylation of 1-octene in perfluorocarbon solvents. Catalyst activity, regioselectivity and the levels of rhodium leaching to the product phase vary with the substitution patterns of the modifying ligands that do not correlate with the electronic properties or partition coefficients of these ligands, but can be interpreted in terms of differences in the resting states of the catalysts. PMID:16311639

  7. Preparation and reactivity of macrocyclic rhodium(III) alkyl complexes

    SciTech Connect

    Carraher, Jack M.; Ellern, Arkady; Bakac, Andreja

    2013-09-21

    Macrocyclic rhodium(II) complexes LRh(H2O)(2+) (L = L-1 = cyclam and L-2 = meso-Me-6-cyclam) react with alkyl hydroperoxides RC(CH3)(2)OOH to generate the corresponding rhodium(III) alkyls L(H2O)RhR2+ (R = CH3, C2H5, PhCH2). Methyl and benzyl complexes can also be prepared by bimolecular group transfer from alkyl cobaloximes (dmgH)(2)(H2O) CoR and (dmgBF(2))(2)(H2O) CoR (R = CH3, PhCH2) to LRh(H2O)(2+). The new complexes were characterized by solution NMR and by crystal structure analysis. They exhibit great stability in aqueous solution at room temperature, but undergo efficient Rh-C bond cleavage upon photolysis. (C) 2013 Elsevier B.V. All rights reserved.

  8. Plasmonics in the UV range with Rhodium nanocubes

    NASA Astrophysics Data System (ADS)

    Zhang, X.; Gutiérrez, Y.; Li, P.; Barreda, Á. I.; Watson, A. M.; Alcaraz de la Osa, R.; Finkelstein, G.; González, F.; Ortiz, D.; Saiz, J. M.; Sanz, J. M.; Everitt, H. O.; Liu, J.; Moreno, F.

    2016-04-01

    Plasmonics in the UV-range constitutes a new challenge due to the increasing demand to detect, identify and destroy biological toxins, enhance biological imaging, and characterize semiconductor devices at the nanometer scale. Silver and aluminum have an efficient plasmonic performance in the near UV region, but oxidation reduces its performance in this range. Recent studies point out rhodium as one of the most promising metals for this purpose: it has a good plasmonic response in the UV and, as gold in the visible, it presents a low tendency to oxidation. Moreover, its easy fabrication through chemical means and its potential for photocatalytic applications, makes this material very attractive for building plasmonic tools in the UV. In this work, we will show an overview of our recent collaborative research with rhodium nanocubes (NC) for Plasmonics in the UV.

  9. Hydrodesulfurization Properties of Rhodium Phosphide: Comparison with Rhodium Metal and Sulfide Catalysts

    SciTech Connect

    Hayes, John R.; Bowker, Richard H.; Gaudette, Amy F.; Smith, Mica C.; Moak, Cameron E.; Nam, Charles Y.; Pratum, Thomas K.; Bussell, Mark E.

    2010-12-15

    Silica-supported rhodium phosphide (Rh2P/SiO2) catalysts were prepared and characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), 31P solid-state NMR spectroscopy, X-ray photoelectron spectroscopy (XPS), and chemisorption measurements. XRD and TEM analysis of a 5 wt.% Rh2P/SiO2 catalyst confirmed the presence of well-dispersed Rh2P crystallites on the silica support having an average crystallite size of 10 nm. NMR spectroscopy showed unsupported and silica-supported Rh2P to be metallic and XPS spectroscopy yielded a surface composition of Rh1.94P1.00 that is similar to that expected from the bulk stoichiometry. The 5 wt.% Rh2P/SiO2 catalyst exhibited a higher dibenzothiophene (DBT) hydrodesulfurization (HDS) activity than did Rh/SiO2 and sulfided Rh/SiO2 catalysts having a similar Rh loading and was also more active than a commercial NiAMo/Al2O3 catalyst. The Rh2P/SiO2 catalyst showed excellent stability over a 100 h DBT HDS activity measurement and was more S tolerant than the Rh/SiO2 catalyst. The Rh2P/SiO2 catalyst strongly favored the hydrogenation pathway for DBT HDS, while the Rh/SiO2 and sulfided Rh/SiO2 catalysts favored the direct desulfurization pathway.

  10. Rhodium(II)-catalyzed enantioselective synthesis of troponoids.

    PubMed

    Murarka, Sandip; Jia, Zhi-Jun; Merten, Christian; Daniliuc, Constantin-G; Antonchick, Andrey P; Waldmann, Herbert

    2015-06-22

    We report a rhodium(II)-catalyzed highly enantioselective 1,3-dipolar cycloaddition reaction between the carbonyl moiety of tropone and carbonyl ylides to afford troponoids in good to high yields with excellent enantioselectivity. We demonstrate that α-diazoketone-derived carbonyl ylides, in contrast to carbonyl ylides derived from diazodiketoesters, undergo [6+3] cycloaddition reactions with tropone to yield the corresponding bridged heterocycles with excellent stereoselectivity. PMID:25959033

  11. Arylation of rhodium(II) azavinyl carbenes with boronic acids.

    PubMed

    Selander, Nicklas; Worrell, Brady T; Chuprakov, Stepan; Velaparthi, Subash; Fokin, Valery V

    2012-09-12

    A highly efficient and stereoselective arylation of in situ-generated azavinyl carbenes affording 2,2-diaryl enamines at ambient temperatures has been developed. These transition-metal carbenes are directly produced from readily available and stable 1-sulfonyl-1,2,3-triazoles in the presence of a rhodium carboxylate catalyst. In several cases, the enamines generated in this reaction can be cyclized into substituted indoles employing copper catalysis. PMID:22913576

  12. Rhodium-Catalyzed Enantioselective Hydroamination of Alkynes with Indolines

    PubMed Central

    Chen, Qing-An; Chen, Zhiwei; Dong, Vy M.

    2016-01-01

    The hydroamination of internal alkynes via tandem rhodium-catalysis gives branched N-allylic indolines with high regio- and enantioselectivity. An acid-switch provides access to the linear isomer in preference to the branched isomer by an isomerization mechanism. Mechanistic studies suggest formation of an allene intermediate, which undergoes hydroamination to generate allylic amines instead of the enamine or imine products typically observed in alkyne hydroaminations. PMID:26107923

  13. Antitumor effect and toxicity of free rhodium (II) citrate and rhodium (II) citrate-loaded maghemite nanoparticles in mice bearing breast cancer

    PubMed Central

    2013-01-01

    Background Magnetic fluids containing superparamagnetic iron oxide nanoparticles represent an attractive platform as nanocarriers in chemotherapy. Recently, we developed a formulation of maghemite nanoparticles coated with rhodium (II) citrate, which resulted in in vitro cytotoxicity enhanced up to 4.6 times when compared to free rhodium (II) citrate formulation on breast carcinoma cells. In this work, we evaluate the antitumor activity and toxicity induced by these formulations in Balb/c mice bearing orthotopic 4T1 breast carcinoma. Methods Mice were evaluated with regard to the treatments’ toxicity through analyses of hemogram, serum levels of alanine aminotransferase, iron, and creatinine; DNA fragmentation and cell cycle of bone marrow cells; and liver, kidney and lung histology. In addition, the antitumor activity of rhodium (II) citrate and maghemite nanoparticles coated with rhodium (II) citrate was verified by tumor volume reduction, histology and immunohistochemistry. Results Regarding the treatments’ toxicity, no experimental groups had alterations in levels of serum ALT or creatinine, and this suggestion was corroborated by the histopathologic examination of liver and kidney of mice. Moreover, DNA fragmentation frequency of bone marrow cells was lower than 15% in all experimental groups. On the other hand, the complexes rhodium (II) citrate-functionalized maghemite and free rhodium (II) citrate led to a marked growth inhibition of tumor and decrease in CD31 and Ki-67 staining. Conclusions In summary, we demonstrated that both rhodium (II) citrate and maghemite nanoparticles coated with rhodium (II) citrate formulations exhibited antitumor effects against 4T1 metastatic breast cancer cell line following intratumoral administration. This antitumor effect was followed by inhibition of both cell proliferation and microvascularization and by tumor tissue injury characterized as necrosis and fibrosis. Remarkably, this is the first published report

  14. Methanol as a reaction medium and reagent in substrate reactions of rhodium porphyrins.

    PubMed

    Li, Shan; Sarkar, Sounak; Wayland, Bradford B

    2009-09-01

    Methanol solutions of rhodium(III) tetra(p-sulfonatophenyl) porphyrin [(TSPP)Rh(III)] have a hydrogen ion dependent equilibrium between bis-methanol, monomethoxy monomethanol, and bis-methoxy complexes. Reactions of dihydrogen (D(2)) with solutions of [(TSPP)Rh(III)] complexes in methanol produce equilibrium distributions of a rhodium hydride [(TSPP)Rh(III)-D(CD(3)OD)](-4) and rhodium(I) complex [(TSPP)Rh(I)(CD(3)OD)](-5). The rhodium hydride complex in methanol functions as a weak acid with an acid dissociation constant of 1.1(0.1) x 10(-9) at 298 K. Patterns of rhodium hydride substrate reactions in methanol are illustrated by addition with ethene, acetaldehyde, and carbon monoxide to form rhodium alkyl, alpha-hydroxyethyl, and formyl complexes, respectively. The free energy change for the addition reaction of [(TSPP)Rh(III)-D(CD(3)OD)](-4) with CO in methanol to produce a formyl complex (DeltaG(o)(298K) = -4.7(0.1) kcal mol(-1)) is remarkably close to DeltaG(o)(298K) values for analogous reactions in water and benzene. Addition reactions of the rhodium hydride ([(TSPP)Rh(III)-D(CD(3)OD)](-4)) with vinyl olefins invariably yield the anti-Markovnikov product which places the rhodium porphyrin on the less hindered terminal primary carbon center. Addition of the rhodium-methoxide unit in [(TSPP)Rh(III)-OCD(3)(CD(3)OD)](-4) with olefins to form beta-methoxyalkyl complexes places rhodium on the terminal carbon for alkene hydrocarbons and vinyl acetate, but vinyl olefins that have pi-electron withdrawing substituents have a thermodynamic preference for placing rhodium on the interior carbon where negative charge is better accommodated. Equilibrium thermodynamic values for addition of the Rh-OCD(3) unit to olefins in methanol are evaluated and compared with values for Rh-OH addition to olefins in water. PMID:19642648

  15. Rhodium coated mirrors deposited by magnetron sputtering for fusion applications.

    PubMed

    Marot, L; De Temmerman, G; Oelhafen, P; Covarel, G; Litnovsky, A

    2007-10-01

    Metallic mirrors will be essential components of all optical spectroscopy and imaging systems for ITER plasma diagnostics. Any change in the mirror performance, in particular, its reflectivity, due to erosion of the surface by charge exchange neutrals or deposition of impurities will influence the quality and reliability of the detected signals. Due to its high reflectivity in the visible wavelength range and its low sputtering yield, rhodium appears as an attractive material for first mirrors in ITER. However, the very high price of the raw material calls for using it in the form of a film deposited onto metallic substrates. The development of a reliable technique for the preparation of high reflectivity rhodium films is therefore of the highest importance. Rhodium layers with thicknesses of up to 2 microm were produced on different substrates of interest (Mo, stainless steel, Cu) by magnetron sputtering. Produced films exhibit a low roughness and crystallite size of about 10 nm with a dense columnar structure. No impurities were detected on the surface after deposition. Scratch tests demonstrate that adhesion properties increase with substrate hardness. Detailed optical characterizations of Rh-coated mirrors as well as results of erosion tests performed both under laboratory conditions and in the TEXTOR tokamak are presented in this paper. PMID:17979419

  16. Rhodium coated mirrors deposited by magnetron sputtering for fusion applications

    SciTech Connect

    Marot, L.; De Temmerman, G.; Oelhafen, P.; Covarel, G.; Litnovsky, A.

    2007-10-15

    Metallic mirrors will be essential components of all optical spectroscopy and imaging systems for ITER plasma diagnostics. Any change in the mirror performance, in particular, its reflectivity, due to erosion of the surface by charge exchange neutrals or deposition of impurities will influence the quality and reliability of the detected signals. Due to its high reflectivity in the visible wavelength range and its low sputtering yield, rhodium appears as an attractive material for first mirrors in ITER. However, the very high price of the raw material calls for using it in the form of a film deposited onto metallic substrates. The development of a reliable technique for the preparation of high reflectivity rhodium films is therefore of the highest importance. Rhodium layers with thicknesses of up to 2 {mu}m were produced on different substrates of interest (Mo, stainless steel, Cu) by magnetron sputtering. Produced films exhibit a low roughness and crystallite size of about 10 nm with a dense columnar structure. No impurities were detected on the surface after deposition. Scratch tests demonstrate that adhesion properties increase with substrate hardness. Detailed optical characterizations of Rh-coated mirrors as well as results of erosion tests performed both under laboratory conditions and in the TEXTOR tokamak are presented in this paper.

  17. Nuclear Data Sheets for A = 89

    SciTech Connect

    Singh, Balraj

    2013-01-15

    The evaluated experimental data are presented for 14 known nuclides of mass 89 (Ge, As, Se, Br, Kr, Rb, Sr, Y, Zr, Nb, Mo, Tc, Ru, Rh). New data on high–spin excitations are available for {sup 89}Kr, {sup 89}Rb, {sup 89}Sr, {sup 89}Tc and {sup 89}Ru, including a superdeformed structure in {sup 89}Tc. Fluorescence studies in {sup 89}Y have revealed a large number of new levels in 7–11 MeV range. New two–neutron transfer data are available for {sup 89}Zr. New direct and precise measurement of atomic masses of {sup 89}Se, {sup 89}Br, 89{sup K}r, {sup 89}Rb, {sup 89}Mo and {sup 89}Tc have greatly improved the Q value landscape in this mass region. This work supersedes previous A=89 evaluation published in 1998Si31, and also the older ones 1989Si20, 1975Ko21, and M.W. Johns et al., Nuclear Data Tables A 8, 373 (1970). In spite of extensive experimental work on the isobaric nuclei of this mass chain several deficiencies remain. The identification of {sup 89}Rh isotope remains unconfirmed. The half–lives of ground states of {sup 89}Ge, {sup 89}As and {sup 89}Rh have not been measured, only the lower limits are estimated from time–of–flight in a reaction and experimental arrangement, where produced and identified. The decay schemes of {sup 89}Ge, {sup 89}As, {sup 89}Se, {sup 89}Ru and {sup 89}Rh are not known, and those for {sup 89}Tc and {sup 89}Mo are incomplete. High–lying (neutron unbound) levels in {sup 89}Kr, expected to be populated in the decay of {sup 89}Br, have not been investigated. The spins and parities for levels in {sup 89}Kr are largely unassigned, while for {sup 89}Tc and {sup 89}Ru, only few low–spin excitations are established. For {sup 89}Rb, little information is available for high–spin structures. Detailed gamma–ray data are available for {sup 88}Sr(n,γ){sup 89}Sr reaction, but most of these γ rays remain unassigned in a level scheme. Excited state data are nonexistent for {sup 89}Ge, {sup 89}As, {sup 89}Se, {sup 89}Br and {sup

  18. Asymmetric ligand-exchange reaction of biphenol derivatives and chiral bis(oxazolinyl)phenyl-rhodium complex.

    PubMed

    Inoue, Hiroko; Ito, Jun-ichi; Kikuchi, Makoto; Nishiyama, Hisao

    2008-09-01

    Chiral bis(oxazolinyl)phenyl-rhodium acetate complex can enantioselectively capture 1,1'-binaphthol derivatives by ligand-exchange reaction. The structure of the bis(oxazolinyl)phenyl-rhodium biphenol and binaphthol complexes were confirmed by X-ray analysis. PMID:18496824

  19. A nine-atom rhodium-aluminum oxide cluster oxidizes five carbon monoxide molecules.

    PubMed

    Li, Xiao-Na; Zhang, Hua-Min; Yuan, Zhen; He, Sheng-Gui

    2016-01-01

    Noble metals can promote the direct participation of lattice oxygen of very stable oxide materials such as aluminum oxide, to oxidize reactant molecules, while the fundamental mechanism of noble metal catalysis is elusive. Here we report that a single atom of rhodium, a powerful noble metal catalyst, can promote the transfer of five oxygen atoms to oxidize carbon monoxide from a nine-atom rhodium-aluminum oxide cluster. This is a sharp improvement in the field of cluster science where the transfer of at most two oxygen atoms from a doped cluster is more commonly observed. Rhodium functions not only as the preferred trapping site to anchor and oxidize carbon monoxide by the oxygen atoms in direct connection with rhodium but also the primarily oxidative centre to accumulate the large amounts of electrons and the polarity of rhodium is ultimately transformed from positive to negative. PMID:27094921

  20. Annual Report, 1988-89.

    ERIC Educational Resources Information Center

    South Carolina State Dept. of Education, Columbia. Office of Instructional Technology.

    This report summarizes the activities of the South Carolina Office of Instructional Technology during the 1988-89 school year. Objectives relating to planning, fiscal management, administration, computers, evaluation, dissemination, and reporting for the office's Annual Management Plan are outlined. An advisory system designed to facilitate…

  1. 10 CFR 52.89 - [Reserved

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 10 Energy 2 2010-01-01 2010-01-01 false 52.89 Section 52.89 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Combined Licenses § 52.89...

  2. 10 CFR 52.89 - [Reserved

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 10 Energy 2 2012-01-01 2012-01-01 false 52.89 Section 52.89 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Combined Licenses § 52.89...

  3. 10 CFR 52.89 - [Reserved

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 10 Energy 2 2013-01-01 2013-01-01 false 52.89 Section 52.89 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Combined Licenses § 52.89...

  4. 10 CFR 52.89 - [Reserved

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 10 Energy 2 2014-01-01 2014-01-01 false 52.89 Section 52.89 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Combined Licenses § 52.89...

  5. 10 CFR 52.89 - [Reserved

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 10 Energy 2 2011-01-01 2011-01-01 false 52.89 Section 52.89 Energy NUCLEAR REGULATORY COMMISSION (CONTINUED) LICENSES, CERTIFICATIONS, AND APPROVALS FOR NUCLEAR POWER PLANTS Combined Licenses § 52.89...

  6. Molecular recognition in protein modification with rhodium metallopeptides

    PubMed Central

    Ball, Zachary T.

    2015-01-01

    Chemical manipulation of natural, unengineered proteins is a daunting challenge which tests the limits of reaction design. By combining transition-metal or other catalysts with molecular recognition ideas, it is possible to achieve site-selective protein reactivity without the need for engineered recognition sequences or reactive sites. Some recent examples in this area have used ruthenium photocatalysis, pyridine organocatalysis, and rhodium(II) metallocarbene catalysis, indicating that the fundamental ideas provide opportunities for using diverse reactivity on complex protein substrates and in complex cell-like environments. PMID:25588960

  7. Oxygen Reduction Mechanism of Monometallic Rhodium Hydride Complexes.

    PubMed

    Halbach, Robert L; Teets, Thomas S; Nocera, Daniel G

    2015-08-01

    The reduction of O2 to H2O mediated by a series of electronically varied rhodium hydride complexes of the form cis,trans-Rh(III)Cl2H(CNAd)(P(4-X-C6H4)3)2 (2) (CNAd = 1-adamantylisocyanide; X = F (2a), Cl (2b), Me (2c), OMe (2d)) was examined through synthetic and kinetic studies. Rhodium(III) hydride 2 reacts with O2 to afford H2O with concomitant generation of trans-Rh(III)Cl3(CNAd)(P(4-X-C6H4)3)2 (3). Kinetic studies of the reaction of the hydride complex 2 with O2 in the presence of HCl revealed a two-term rate law consistent with an HX reductive elimination (HXRE) mechanism, where O2 binds to a rhodium(I) metal center and generates an η(2)-peroxo complex intermediate, trans-Rh(III)Cl(CNAd)(η(2)-O2)(P(4-X-C6H4)3)2 (4), and a hydrogen-atom abstraction (HAA) mechanism, which entails the direct reaction of O2 with the hydride. Experimental data reveal that the rate of reduction of O2 to H2O is enhanced by electron-withdrawing phosphine ligands. Complex 4 was independently prepared by the addition of O2 to trans-Rh(I)Cl(CNAd)(P(4-X-C6H4)3)2 (1). The reactivity of 4 toward HCl reveals that such peroxo complexes are plausible intermediates in the reduction of O2 to H2O. These results show that the given series of electronically varied rhodium(III) hydride complexes facilitate the reduction of O2 to H2O according to a two-term rate law comprising HXRE and HAA pathways and that the relative rates of these two pathways, which can occur simultaneously and competitively, can be systematically modulated by variation of the electronic properties of the ancillary ligand set. PMID:26168057

  8. The solubility of hydrogen in rhodium, ruthenium, iridium and nickel.

    NASA Technical Reports Server (NTRS)

    Mclellan, R. B.; Oates, W. A.

    1973-01-01

    The temperature variation of the solubility of hydrogen in rhodium, ruthenium, iridium, and nickel in equilibrium with H2 gas at 1 atm pressure has been measured by a technique involving saturating the solvent metal with hydrogen, quenching, and analyzing in resultant solid solutions. The solubilities determined are small (atom fraction of H is in the range from 0.0005 to 0.00001, and the results are consistent with the simple quasi-regular model for dilute interstitial solid solutions. The relative partial enthalpy and excess entropy of the dissolved hydrogen atoms have been calculated from the solubility data and compared with well-known correlations between these quantities.

  9. Atomic-absorption determination of rhodium in chromite concentrates

    USGS Publications Warehouse

    Schnepfe, M.M.; Grimaldi, F.S.

    1969-01-01

    Rhodium is determined in chromite concentrates by atomic absorption after concentration either by co-precipitation with tellurium formed by the reduction of tellurite with tin(II) chloride or by fire assay into a gold bead. Interelement interferences in the atomic-absorption determination are removed by buffering the solutions with lanthanum sulphate (lanthanum concentration 1%). Substantial amounts of Ag, Al, Au, Bi, Ca, Cd, Co, Cr, Cu, Fe, Ho, Hg, K, La, Mg, Mn, Mo, Na, Ni, Pb, Te, Ti, V, Y, Zn and platinum metals can be tolerated. A lower limit of approximately 0.07 ppm Rh can be determined in a 3-g sample. ?? 1969.

  10. Rhodium Complex with Ethylene Ligands Supported on Highly Dehydroxylated MgO: Synthesis, Characterization, and Reactivity

    SciTech Connect

    Bhirud,V.; Ehresmann, J.; Kletnieks, P.; Haw, J.; Gates, B.

    2006-01-01

    Mononuclear rhodium complexes with reactive olefin ligands, supported on MgO powder, were synthesized by chemisorption of Rh(C2H4)2(C5H7O2) and characterized by infrared (IR), {sup 13}C MAS NMR, and extended X-ray absorption fine structure (EXAFS) spectroscopies. IR spectra show that the precursor adsorbed on MgO with dissociation of acetylacetonate ligand from rhodium, with the ethylene ligands remaining bound to the rhodium, as confirmed by the NMR spectra. EXAFS spectra give no evidence of Rh-Rh contributions, indicating that site-isolated mononuclear rhodium species formed on the support. The EXAFS data also show that the mononuclear complex was bonded to the support by two Rh-O bonds, at a distance of 2.18 Angstroms, which is typical of group 8 metals bonded to oxide supports. This is the first simple and nearly uniform supported mononuclear rhodium-olefin complex, and it appears to be a close analogue of molecular catalysts for olefin hydrogenation in solution. Correspondingly, the ethylene ligands bonded to rhodium in the supported complex were observed to react with H{sub 2} to form ethane, and the supported complex was catalytically active for the ethylene hydrogenation at 298 K. The ethylene ligands also underwent facile exchange with C{sub 2}D{sub 4}, and exposure of the sample to carbon monoxide led to the formation of rhodium gem dicarbonyls.

  11. Determination of rhodium: Since the origins until today Atomic absorption spectrometry.

    PubMed

    Bosch Ojeda, C; Sánchez Rojas, F

    2006-02-28

    Rhodium is present at about 0.001ppm in the earths crust. Rhodium metal is known for its stability in corrosive environments, physical beauty and unique physical and chemical properties. Recent interest in the medical and industrial significance of platinum and to a lesser extent palladium and rhodium has been accompanied by an increasing interest in their determination at low levels. Platinum group elements (PGEs: Pt, Pd, Rh, Ru, Ir and Os) play a decisive role in the performance of catalytic converters, world-wide applied in vehicles and in some household utensils, to reduce the emission of gaseous pollutants, such as carbon monoxide, nitrogen oxides and hydrocarbons. Since then, approximately 73% of the world production of rhodium is consumed in the production of autocatalyst. However, the hot exhaust gases flowing through the converter cause abrasion of these units, leading to the emission of these elements to the environment. The concentration level of rhodium (also platinum and palladium) is still very low in the nature; accordingly, their determination in environmental samples specially appears to be a challenging task for analytical chemists. In recent years, the development of analytical methods for the determination of rhodium has increased. The aim of the present review is to evaluate the utility of atomic absorption spectrometry, applied for the quantification of rhodium in different materials, such as environmental, biological, metallurgical and geological samples. PMID:18970480

  12. Degradation of nonmodified and rhodium modified aluminide coating deposited on CMSX 4 superalloy.

    PubMed

    Zagula-Yavorska, Maryana; Wierzbińska, Małgorzata; Gancarczyk, Kamil; Sieniawski, Jan

    2016-07-01

    The Ni-base superalloy CMSX 4 used in the turbine blades of aircraft engines was coated with rhodium layer (0.5-μm thick). Next coated CMSX 4 superalloy was aluminized by the CVD method. The rhodium modified aluminide coating and nonmodified aluminide coating were oxidized at 1100°C at the air atmosphere. The rhodium modified aluminide coating showed about twice better oxidation resistance than the nonmodified one. The spallation equal 62% of the total area was observed on the surface of the nonmodified coating whereas only 36% spallation area was observed on the surface of the rhodium modified aluminide coating after the oxidation test. The oxide layer formed on the surface of the nonmodified coating was composed of nonprotective (Ni,Cr)Al2 O4 and (Ni,Cr)O phases. Aluminium in the coating reacts with oxygen, forming a protective α-Al2 O3 oxide on the surface of the rhodium modified aluminide coating. When the oxide cracks and spalls due to oxidation, additional aluminium from the coating diffuses to the surface to form the oxide. The presence of protective Al2 O3 oxide on the surface of the rhodium modified aluminide coating slows coating degradation. Therefore, rhodium modified aluminide coating has better oxidation resistance than the nonmodified one. PMID:27018853

  13. Asymmetric dual catalysis via fragmentation of a single rhodium precursor complex.

    PubMed

    Song, Liangliang; Gong, Lei; Meggers, Eric

    2016-06-01

    A strategy for dual transition metal catalysis and organocatalysis is reported via the in situ disintegration of a single rhodium complex. The hereby generated chiral Lewis acid and l-β-phenylalanine synergistically catalyze the Michael addition of α,α-disubstituted aldehydes to α,β-unsaturated 2-acyl imidazoles under the formation of vicinal quaternary/tertiary stereocenters. Conveniently, the chiral-at-metal rhodium catalyst can be synthesized in just two steps starting from rhodium trichloride without the need for any chromatography. PMID:27231188

  14. Diverting Hydrogenations with Wilkinson's Catalyst towards Highly Reactive Rhodium(I) Species.

    PubMed

    Perea-Buceta, Jesus E; Fernández, Israel; Heikkinen, Sami; Axenov, Kirill; King, Alistair W T; Niemi, Teemu; Nieger, Martin; Leskelä, Markku; Repo, Timo

    2015-11-23

    The addition of Barton's base has a dramatic effect on the classic rhodium(III)-mediated hydrogenations promoted by Wilkinson's catalyst. Following the initial oxidative addition, a barrierless reductive elimination of HCl from the traditional rhodium(III) intermediates instantly produces a rhodium(I) monohydride species, which is remarkably reactive in the hydrogenation of several internal alkynes and functionalized trisubstituted alkenes. The direct formation of this species is unprecedented upon addition of molecular hydrogen and its catalytic potential has been hitherto barely explored. PMID:26437764

  15. Preparation and reactivity of macrocyclic rhodium(III) alkyl complexes

    SciTech Connect

    Carraher, Jack M.; Ellern, Arkady; Bakac, Andreja

    2013-09-21

    We found that the macrocyclic rhodium(II) complexes LRh(H2O)2+ (L = L1 = cyclam and L2 = meso-Me-6-cyclam) react with alkyl hydroperoxides RC(CH3)2OOH to generate the corresponding rhodium(III) alkyls L(H2O)RhR2+ (R = CH3, C2H5, PhCH2). Methyl and benzyl complexes can also be prepared by bimolecular group transfer from alkyl cobaloximes (dmgH)2(H2O) CoR and (dmgBF2)2(H2O) CoR (R = CH3, PhCH2) to LRh(H2O)2+. Moreover, the new complexes were characterized by solution NMR and by crystal structure analysis. They exhibit great stability in aqueous solution at room temperature, but undergo efficient Rh-C bond cleavage upon photolysis.

  16. Production of 89Sr in solution reactor.

    PubMed

    Chuvilin, D Yu; Khvostionov, V E; Markovskij, D V; Pavshook, V A; Ponomarev-Stepnoy, N N; Udovenko, A N; Shatrov, A V; Vereschagin, Yu I; Rice, J; Tome, L A

    2007-10-01

    The new method for medical (89)Sr production in a reactor with solution fuel is proposed which is characterized by simplicity, high production efficiency and low buildup of radioactive waste. The main advantages of the new technology were validated by numerous experiments. The proposed new technology selectively extracts (89)Sr from a fuel of solution reactor and precludes penetration of (90)Sr into the final product. This method is based on the presence of gaseous radionuclide (89)Kr (T(1/2)=190.7s) in the decay chain (89)Se-->(89)Br-->(89)Kr-->(89)Rb-->(89)Sr. The performed experiments on taking the gas probes from internal volume of the solution 20 kW mini-reactor "Argus" have confirmed that the mechanism for (89)Sr delivery to the sorption volume of the reactor experimental loop is based on transport of gaseous (89)Sr predecessor-radionuclide (89)Kr. According to the measurements of radioactive impurities in a final (89)SrCl(2) solution, the filtration of the gas flow with cermet filters followed by cleaning of (89)Sr chloride solution in chromatographic columns with DOWEX-50 x 8 or Sr-Resin ensures reception of (89)Sr fully meeting the requirements for medical application. The experimental estimations have shown that the proposed new technology is multiply more productive than the traditional industrial methods of (89)Sr reception. PMID:17611114

  17. A Rhodium Catalyst Superior to Iridium Congeners for Enantioselective Radical Amination Activated by Visible Light.

    PubMed

    Shen, Xiaodong; Harms, Klaus; Marsch, Michael; Meggers, Eric

    2016-06-27

    A bis-cyclometalated rhodium(III) complex catalyzes a visible-light-activated enantioselective α-amination of 2-acyl imidazoles with up to 99 % yield and 98 % ee. The rhodium catalyst is ascribed a dual function as a chiral Lewis acid and, simultaneously, as a light-activated smart initiator of a radical-chain process through intermediate aminyl radicals. Notably, related iridium-based photoredox catalysts reported before were unsuccessful in this enantioselective radical C-N bond formation. The surprising preference for rhodium over iridium is attributed to much faster ligand-exchange kinetics of the rhodium complexes involved in the catalytic cycle, which is crucial to keep pace with the highly reactive and thus short-lived nitrogen-centered radical intermediate. PMID:27145893

  18. Rhodium-Catalyzed Asymmetric [2 + 2 + 2] Cycloaddition of 1,6-Enynes with Cyclopropylideneacetamides.

    PubMed

    Yoshizaki, Soichi; Nakamura, Yu; Masutomi, Koji; Yoshida, Tomoka; Noguchi, Keiichi; Shibata, Yu; Tanaka, Ken

    2016-02-01

    It has been established that a cationic rhodium(I)/H8-BINAP complex catalyzes the asymmetric [2 + 2 + 2] cycloaddition of 1,6-enynes with cyclopropylideneacetamides to produce spirocyclohexenes in excellent enantioselectivity with retaining cyclopropane rings. PMID:26756430

  19. Rhodium complex immobilized on graphene oxide as an efficient and recyclable catalyst for hydrogenation of cyclohexene.

    PubMed

    Zhao, Qingshan; Chen, Dafa; Li, Yang; Zhang, Guoliang; Zhang, Fengbao; Fan, Xiaobin

    2013-02-01

    Rhodium complexes can be homogeneously immobilized on functionalized graphene oxide through coordination interaction. The obtained catalyst can be readily recycled and shows enhanced activity in the catalytic hydrogenation of cyclohexene. PMID:23238302

  20. Chloride-Bridged Dinuclear Rhodium(III) Complexes Bearing Chiral Diphosphine Ligands: Catalyst Precursors for Asymmetric Hydrogenation of Simple Olefins.

    PubMed

    Kita, Yusuke; Hida, Shoji; Higashihara, Kenya; Jena, Himanshu Sekhar; Higashida, Kosuke; Mashima, Kazushi

    2016-07-11

    Efficient rhodium(III) catalysts were developed for asymmetric hydrogenation of simple olefins. A new series of chloride-bridged dinuclear rhodium(III) complexes 1 were synthesized from the rhodium(I) precursor [RhCl(cod)]2 , chiral diphosphine ligands, and hydrochloric acid. Complexes from the series acted as efficient catalysts for asymmetric hydrogenation of (E)-prop-1-ene-1,2-diyldibenzene and its derivatives without any directing groups, in sharp contrast to widely used rhodium(I) catalytic systems that require a directing group for high enantioselectivity. The catalytic system was applied to asymmetric hydrogenation of allylic alcohols, alkenylboranes, and unsaturated cyclic sulfones. Control experiments support the superiority of dinuclear rhodium(III) complexes 1 over typical rhodium(I) catalytic systems. PMID:27088539

  1. Diversity synthesis using the complimentary reactivity of rhodium(II)- and palladium(II)-catalyzed reactions.

    PubMed

    Ni, Aiwu; France, Jessica E; Davies, Huw M L

    2006-07-21

    Rhodium(II)-catalyzed reactions of aryldiazoacetates can be conducted in the presence of iodide, triflate, organoboron, and organostannane functionality, resulting in the formation of a variety of cyclopropanes or C-H insertion products with high stereoselectivity. The combination of the rhodium(II)-catalyzed reaction with a subsequent palladium(II)-catalyzed Suzuki coupling offers a novel strategy for diversity synthesis. PMID:16839138

  2. Rhodium-Catalyzed Regioselective C7-Functionalization of N-Pivaloylindoles.

    PubMed

    Xu, Lanting; Zhang, Chao; He, Yupeng; Tan, Lushi; Ma, Dawei

    2016-01-01

    An efficient rhodium-catalyzed method for direct C-H functionalization at the C7 position of a wide range of indoles has been developed. Good to excellent yields of alkenylation products were observed with acrylates, styrenes, and vinyl phenyl sulfones, whereas the saturated alkylation products were obtained in good yield with α,β-unsaturated ketones. Both the N-pivaloyl directing group and the rhodium catalyst proved to be crucial for high regioselectivity and conversion. PMID:26510833

  3. Rhodium-Catalyzed Ketone Methylation Using Methanol Under Mild Conditions: Formation of α-Branched Products**

    PubMed Central

    Chan, Louis K M; Poole, Darren L; Shen, Di; Healy, Mark P; Donohoe, Timothy J

    2014-01-01

    The rhodium-catalyzed methylation of ketones has been accomplished using methanol as the methylating agent and the hydrogen-borrowing method. The sequence is notable for the relatively low temperatures that are required and for the ability of the reaction system to form α-branched products with ease. Doubly alkylated ketones can be prepared from methyl ketones and two different alcohols by using a sequential one-pot iridium- and rhodium-catalyzed process. PMID:24288297

  4. Rhodium(II)-Catalyzed Isomerization of Cyclopropenylmethyl Esters into (Acyloxymethylene)cyclopropanes.

    PubMed

    Archambeau, Alexis; Nguyen, Dinh-Vu; Meyer, Christophe; Cossy, Janine

    2016-04-18

    In the presence of a rhodium(II) catalyst, 3,3-disubstituted cyclopropenylmethyl esters that possess an electron-rich or neutral aromatic group undergo isomerization into (acyloxymethylene)cyclopropanes. This transformation, which proceeds with inversion of configuration at the stereogenic center, complements the previously disclosed rearrangement reactions of cyclopropenylmethyl esters. The products arising from this new rhodium-catalyzed rearrangement contain an enol ester group that can be subsequently functionalized to access stereodefined arylcyclopropanes. PMID:26990014

  5. Calculated mammographic spectra confirmed with attenuation curves for molybdenum, rhodium, and tungsten targets.

    PubMed

    Blough, M M; Waggener, R G; Payne, W H; Terry, J A

    1998-09-01

    A model for calculating mammographic spectra independent of measured data and fitting parameters is presented. This model is based on first principles. Spectra were calculated using various target and filter combinations such as molybdenum/molybdenum, molybdenum/rhodium, rhodium/rhodium, and tungsten/aluminum. Once the spectra were calculated, attenuation curves were calculated and compared to measured attenuation curves. The attenuation curves were calculated and measured using aluminum alloy 1100 or high purity aluminum filtration. Percent differences were computed between the measured and calculated attenuation curves resulting in an average of 5.21% difference for tungsten/aluminum, 2.26% for molybdenum/molybdenum, 3.35% for rhodium/rhodium, and 3.18% for molybdenum/rhodium. Calculated spectra were also compared to measured spectra from the Food and Drug Administration [Fewell and Shuping, Handbook of Mammographic X-ray Spectra (U.S. Government Printing Office, Washington, D.C., 1979)] and a comparison will also be presented. PMID:9775364

  6. Catalytic Degradation of Sulfur Hexafluoride by Rhodium Complexes.

    PubMed

    Zámostná, Lada; Braun, Thomas

    2015-09-01

    The development of a safe and efficient method for the degradation of SF6 is of current environmental interest, because SF6 is one of the most potent greenhouse gases. SF6 is thermally and chemically extremely inert, and therefore, it has been used in various industrial applications. However, this inertness results in a major challenge for its depletion. We report on a process for a catalytic degradation of SF6 in the homogeneous phase by using rhodium complexes as precatalysts. The SF6 activation reactions feature mild reaction conditions, low catalyst loadings, and a high selectivity. The employment of phosphines and hydrosilanes for scavenging the sulfur and fluorine atoms of the SF6 molecule allows the selective transformation of SF6 into nongaseous and nontoxic compounds. PMID:26190201

  7. Rhodium Oxide Cluster Ions Studied by Thermal Desorption Spectrometry.

    PubMed

    Mafuné, Fumitaka; Takenouchi, Masato; Miyajima, Ken; Kudoh, Satoshi

    2016-01-28

    Gas-phase rhodium oxide clusters, RhnOm(+), were investigated by measuring the rate constants of oxidation and thermal desorption spectrometry. RhnOm(+) was suggested to be categorized into different states as m/n ≤ 1, 1 < m/n ≤ 1.5, and 1.5 < m/n in terms of energy and kinetics. For m/n ≤ 1, the O atoms readily adsorbed on the cluster with a large binding energy until RhO was formed. Under the O2-rich environment, oxidation proceeded until Rh2O3 was formed with a moderate binding energy. In addition, O2 molecules attached weakly to the cluster, and Rh2O3 formed RhnOm(+) (1.5 < m/n). The energetics and geometries of Rh6Om(+) (m = 6-12) were obtained using density functional theory calculations and were found to be consistent with the experimental results. PMID:26730616

  8. Capsule-controlled selectivity of a rhodium hydroformylation catalyst

    NASA Astrophysics Data System (ADS)

    Bocokić, Vladica; Kalkan, Ayfer; Lutz, Martin; Spek, Anthony L.; Gryko, Daniel T.; Reek, Joost N. H.

    2013-10-01

    Chemical processes proceed much faster and more selectively in the presence of appropriate catalysts, and as such the field of catalysis is of key importance for the chemical industry, especially in light of sustainable chemistry. Enzymes, the natural catalysts, are generally orders of magnitude more selective than synthetic catalysts and a major difference is that they take advantage of well-defined cavities around the active site to steer the selectivity of a reaction via the second coordination sphere. Here we demonstrate that such a strategy also applies for a rhodium catalyst; when used in the hydroformylation of internal alkenes, the selectivity of the product formed is steered solely by changing the cavity surrounding the metal complex. Detailed studies reveal that the origin of the capsule-controlled selectivity is the capsule reorganization energy, that is, the high energy required to accommodate the hydride migration transition state, which leads to the minor product.

  9. Search for multiple chiral doublets in rhodium isotopes

    SciTech Connect

    Peng, J.; Sagawa, H.; Zhang, S. Q.; Yao, J. M.; Zhang, Y.; Meng, J.

    2008-02-15

    The deformation in rhodium isotopes is investigated using adiabatic and configuration-fixed constrained triaxial relativistic mean field (RMF) approaches. The triaxial deformations are found in the ground states of {sup 102,104,106,108,110}Rh, which is consistent with triaxial Skyrme Hartree-Fock calculations. Several minima with triaxial deformation in {sup 104,106,108,110}Rh are obtained by the configuration-fixed constrained calculations. The corresponding configurations are characterized by the quantum numbers |nljm> obtained by transforming wave functions from a Cartesian basis to a spherical basis. The possible existence of multiple chiral doublets (M{chi}D) is demonstrated in {sup 104,106,108,110}Rh isotopes, based on different particle-hole configurations and triaxial deformations.

  10. Enantioselective Rhodium-Catalyzed Atom-Economical Macrolactonization.

    PubMed

    Ganss, Stephanie; Breit, Bernhard

    2016-08-01

    A highly attractive route toward macrolactones, which form the cyclic scaffold of a multitude of diverse natural compounds, is described. Although many chemical approaches to this structural motif have been explored, an asymmetric variant of the cyclization is unprecedented. Herein we present an enantioselective macrolactonization through an intramolecular atom-economical rhodium-catalyzed coupling of ω-allenyl-substituted carboxylic acids. The use of a modified diop ligand, chiral DTBM-diop, led to high enantioselectivity (up to 93 % ee). The reaction tolerated a large variety of functionalities, including α,β-unsaturated carboxylic acids and depsipeptides, and provided the desired macrocycles with very high enantio- and diastereoselectivity. PMID:27383766

  11. The regioselective hydroformylation of vinylsilanes. A remarkable difference in the selectivity and reactivity of cobalt, rhodium, and iridium catalysts

    SciTech Connect

    Crudden, C.M.; Alper, H.

    1994-06-03

    Rhodium, iridium, and cobalt complexes were evaluated as catalysts for hydroformylation of vinylsilanes. Regioselectivities, product structures, and reaction yields were widely variable for these catalysts.

  12. 40 CFR 89.1003 - Prohibited acts.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 21 2012-07-01 2012-07-01 false Prohibited acts. 89.1003 Section 89.1003 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES General Enforcement Provisions and Prohibited Acts § 89.1003...

  13. 40 CFR 89.1003 - Prohibited acts.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 20 2014-07-01 2013-07-01 true Prohibited acts. 89.1003 Section 89.1003 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES General Enforcement Provisions and Prohibited Acts § 89.1003...

  14. 40 CFR 89.1003 - Prohibited acts.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 21 2013-07-01 2013-07-01 false Prohibited acts. 89.1003 Section 89.1003 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES General Enforcement Provisions and Prohibited Acts § 89.1003...

  15. 47 CFR 101.89 - Negotiations.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Negotiations. 101.89 Section 101.89 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Applications and Licenses Policies Governing Fixed Service Relocation from the 18.58-19.30 Ghz Band § 101.89 Negotiations. (a)...

  16. 40 CFR 89.106 - Prohibited controls.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 21 2013-07-01 2013-07-01 false Prohibited controls. 89.106 Section 89...) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Emission Standards and Certification Provisions § 89.106 Prohibited controls. (a) An engine may not be equipped with an...

  17. 40 CFR 89.106 - Prohibited controls.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 20 2014-07-01 2013-07-01 true Prohibited controls. 89.106 Section 89...) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Emission Standards and Certification Provisions § 89.106 Prohibited controls. (a) An engine may not be equipped with an...

  18. 40 CFR 89.106 - Prohibited controls.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 21 2012-07-01 2012-07-01 false Prohibited controls. 89.106 Section 89...) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Emission Standards and Certification Provisions § 89.106 Prohibited controls. (a) An engine may not be equipped with an...

  19. 14 CFR 151.89 - Roads.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 3 2011-01-01 2011-01-01 false Roads. 151.89 Section 151.89 Aeronautics... AID TO AIRPORTS Project Programming Standards § 151.89 Roads. (a) Federal-aid Airport Program funds may not be used to resolve highway problems. Only those airport entrance roads that are...

  20. 14 CFR 151.89 - Roads.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 14 Aeronautics and Space 3 2012-01-01 2012-01-01 false Roads. 151.89 Section 151.89 Aeronautics... AID TO AIRPORTS Project Programming Standards § 151.89 Roads. (a) Federal-aid Airport Program funds may not be used to resolve highway problems. Only those airport entrance roads that are...

  1. 14 CFR 151.89 - Roads.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 3 2014-01-01 2014-01-01 false Roads. 151.89 Section 151.89 Aeronautics... AID TO AIRPORTS Project Programming Standards § 151.89 Roads. (a) Federal-aid Airport Program funds may not be used to resolve highway problems. Only those airport entrance roads that are...

  2. 14 CFR 151.89 - Roads.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 3 2013-01-01 2013-01-01 false Roads. 151.89 Section 151.89 Aeronautics... AID TO AIRPORTS Project Programming Standards § 151.89 Roads. (a) Federal-aid Airport Program funds may not be used to resolve highway problems. Only those airport entrance roads that are...

  3. 40 CFR 89.601 - Applicability.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 21 2012-07-01 2012-07-01 false Applicability. 89.601 Section 89.601 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Importation of Nonconforming Nonroad Engines § 89.601 Applicability....

  4. 14 CFR 33.89 - Operation test.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 1 2010-01-01 2010-01-01 false Operation test. 33.89 Section 33.89... STANDARDS: AIRCRAFT ENGINES Block Tests; Turbine Aircraft Engines § 33.89 Operation test. (a) The operation test must include testing found necessary by the Administrator to demonstrate— (1) Starting,...

  5. 40 CFR 89.206 - Trading.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Trading. 89.206 Section 89.206... EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Averaging, Banking, and Trading Provisions § 89.206 Trading. (a) Requirements for Tier 1 engines rated at or above 37 kW. (1) A...

  6. 7 CFR 993.89 - Effective time.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 8 2012-01-01 2012-01-01 false Effective time. 993.89 Section 993.89 Agriculture... Order Regulating Handling Miscellaneous Provisions § 993.89 Effective time. The provisions of this subpart, as well as any amendments to this subpart, shall become effective at such time as the...

  7. STS-89 Endeavour in Vehicle Assembly Building

    NASA Technical Reports Server (NTRS)

    1997-01-01

    The orbiter Endeavour awaits further processing in the transfer aisle of the Vehicle Assembly Building (VAB). It had been undergoing preparations for the STS-89 mission in Orbiter Processing Facility Bay rocket booster stack slated for use on the STS-89 mission. The STS-89 launch is targeted for Jan. 20, 1998.

  8. 25 CFR 700.89 - Relocation contract.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 25 Indians 2 2012-04-01 2012-04-01 false Relocation contract. 700.89 Section 700.89 Indians THE... Policies and Instructions Definitions § 700.89 Relocation contract. The Relocation Contract is that contract signed by the head of household in which he/she agrees to purchase an existing house or...

  9. 25 CFR 700.89 - Relocation contract.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 25 Indians 2 2014-04-01 2014-04-01 false Relocation contract. 700.89 Section 700.89 Indians THE... Policies and Instructions Definitions § 700.89 Relocation contract. The Relocation Contract is that contract signed by the head of household in which he/she agrees to purchase an existing house or...

  10. 7 CFR 1779.89 - Mergers.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 12 2014-01-01 2013-01-01 true Mergers. 1779.89 Section 1779.89 Agriculture... (CONTINUED) WATER AND WASTE DISPOSAL PROGRAMS GUARANTEED LOANS § 1779.89 Mergers. (a) General. The Agency may... in specific loan note agreements; and (3) All property can be legally transferred to the...

  11. 40 CFR 89.405 - Recorded information.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Recorded information. 89.405 Section 89.405 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Exhaust Emission Test Procedures § 89.405 Recorded information. (a)...

  12. 29 CFR 1960.89 - Organization.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 29 Labor 9 2011-07-01 2011-07-01 false Organization. 1960.89 Section 1960.89 Labor Regulations Relating to Labor (Continued) OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR (CONTINUED... Field Federal Safety and Health Councils § 1960.89 Organization. (a) Field council officers...

  13. 21 CFR 808.89 - Rhode Island.

    Code of Federal Regulations, 2013 CFR

    2013-04-01

    ... 21 Food and Drugs 8 2013-04-01 2013-04-01 false Rhode Island. 808.89 Section 808.89 Food and Drugs... and Local Exemptions § 808.89 Rhode Island. The following Rhode Island medical device requirements are... from preemption under section 521(b) of the act: Rhode Island General Laws, Section 5-49-2.1,...

  14. 21 CFR 808.89 - Rhode Island.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 21 Food and Drugs 8 2011-04-01 2011-04-01 false Rhode Island. 808.89 Section 808.89 Food and Drugs... and Local Exemptions § 808.89 Rhode Island. The following Rhode Island medical device requirements are... from preemption under section 521(b) of the act: Rhode Island General Laws, Section 5-49-2.1,...

  15. 21 CFR 808.89 - Rhode Island.

    Code of Federal Regulations, 2014 CFR

    2014-04-01

    ... 21 Food and Drugs 8 2014-04-01 2014-04-01 false Rhode Island. 808.89 Section 808.89 Food and Drugs... and Local Exemptions § 808.89 Rhode Island. The following Rhode Island medical device requirements are... from preemption under section 521(b) of the act: Rhode Island General Laws, Section 5-49-2.1,...

  16. 21 CFR 808.89 - Rhode Island.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Rhode Island. 808.89 Section 808.89 Food and Drugs... and Local Exemptions § 808.89 Rhode Island. The following Rhode Island medical device requirements are... from preemption under section 521(b) of the act: Rhode Island General Laws, Section 5-49-2.1,...

  17. 21 CFR 808.89 - Rhode Island.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 21 Food and Drugs 8 2012-04-01 2012-04-01 false Rhode Island. 808.89 Section 808.89 Food and Drugs... and Local Exemptions § 808.89 Rhode Island. The following Rhode Island medical device requirements are... from preemption under section 521(b) of the act: Rhode Island General Laws, Section 5-49-2.1,...

  18. 7 CFR 956.89 - Compliance.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 8 2010-01-01 2010-01-01 false Compliance. 956.89 Section 956.89 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements... VALLEY OF SOUTHEAST WASHINGTON AND NORTHEAST OREGON Miscellaneous Provisions § 956.89 Compliance....

  19. 40 CFR 89.116 - Engine families.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 21 2012-07-01 2012-07-01 false Engine families. 89.116 Section 89.116... Provisions § 89.116 Engine families. (a) A manufacturer's product line is divided into engine families that... life periods. (b) The following characteristics distinguish engine families: (1) Fuel; (2)...

  20. 40 CFR 89.116 - Engine families.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 21 2013-07-01 2013-07-01 false Engine families. 89.116 Section 89.116... Provisions § 89.116 Engine families. (a) A manufacturer's product line is divided into engine families that... life periods. (b) The following characteristics distinguish engine families: (1) Fuel; (2)...

  1. 40 CFR 89.116 - Engine families.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 20 2014-07-01 2013-07-01 true Engine families. 89.116 Section 89.116... Provisions § 89.116 Engine families. (a) A manufacturer's product line is divided into engine families that... life periods. (b) The following characteristics distinguish engine families: (1) Fuel; (2)...

  2. 40 CFR 89.116 - Engine families.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 20 2011-07-01 2011-07-01 false Engine families. 89.116 Section 89.116... Provisions § 89.116 Engine families. (a) A manufacturer's product line is divided into engine families that... life periods. (b) The following characteristics distinguish engine families: (1) Fuel; (2)...

  3. 40 CFR 89.116 - Engine families.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Engine families. 89.116 Section 89.116... Provisions § 89.116 Engine families. (a) A manufacturer's product line is divided into engine families that... life periods. (b) The following characteristics distinguish engine families: (1) Fuel; (2)...

  4. 20 CFR 632.89 - Performance standards.

    Code of Federal Regulations, 2012 CFR

    2012-04-01

    ... 20 Employees' Benefits 3 2012-04-01 2012-04-01 false Performance standards. 632.89 Section 632.89... EMPLOYMENT AND TRAINING PROGRAMS Program Design and Management § 632.89 Performance standards. The Department of Labor shall establish performance standards for all Native American grantees (section...

  5. 32 CFR 552.89 - Activities.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 32 National Defense 3 2010-07-01 2010-07-01 true Activities. 552.89 Section 552.89 National Defense Department of Defense (Continued) DEPARTMENT OF THE ARMY MILITARY RESERVATIONS AND NATIONAL CEMETERIES REGULATIONS AFFECTING MILITARY RESERVATIONS Fort Lewis Land Use Policy § 552.89 Activities....

  6. 32 CFR 552.89 - Activities.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 32 National Defense 3 2014-07-01 2014-07-01 false Activities. 552.89 Section 552.89 National Defense Department of Defense (Continued) DEPARTMENT OF THE ARMY MILITARY RESERVATIONS AND NATIONAL CEMETERIES REGULATIONS AFFECTING MILITARY RESERVATIONS Fort Lewis Land Use Policy § 552.89 Activities....

  7. 32 CFR 552.89 - Activities.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 32 National Defense 3 2012-07-01 2009-07-01 true Activities. 552.89 Section 552.89 National Defense Department of Defense (Continued) DEPARTMENT OF THE ARMY MILITARY RESERVATIONS AND NATIONAL CEMETERIES REGULATIONS AFFECTING MILITARY RESERVATIONS Fort Lewis Land Use Policy § 552.89 Activities....

  8. 32 CFR 552.89 - Activities.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 32 National Defense 3 2013-07-01 2013-07-01 false Activities. 552.89 Section 552.89 National Defense Department of Defense (Continued) DEPARTMENT OF THE ARMY MILITARY RESERVATIONS AND NATIONAL CEMETERIES REGULATIONS AFFECTING MILITARY RESERVATIONS Fort Lewis Land Use Policy § 552.89 Activities....

  9. 32 CFR 552.89 - Activities.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 32 National Defense 3 2011-07-01 2009-07-01 true Activities. 552.89 Section 552.89 National Defense Department of Defense (Continued) DEPARTMENT OF THE ARMY MILITARY RESERVATIONS AND NATIONAL CEMETERIES REGULATIONS AFFECTING MILITARY RESERVATIONS Fort Lewis Land Use Policy § 552.89 Activities....

  10. 7 CFR 993.89 - Effective time.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 8 2010-01-01 2010-01-01 false Effective time. 993.89 Section 993.89 Agriculture... Order Regulating Handling Miscellaneous Provisions § 993.89 Effective time. The provisions of this subpart, as well as any amendments to this subpart, shall become effective at such time as the...

  11. 7 CFR 993.89 - Effective time.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 8 2011-01-01 2011-01-01 false Effective time. 993.89 Section 993.89 Agriculture... Order Regulating Handling Miscellaneous Provisions § 993.89 Effective time. The provisions of this subpart, as well as any amendments to this subpart, shall become effective at such time as the...

  12. 40 CFR 89.507 - Sample selection.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 20 2011-07-01 2011-07-01 false Sample selection. 89.507 Section 89.507 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Selective Enforcement Auditing § 89.507 Sample selection. (a)...

  13. 7 CFR 160.89 - Medicinal preparations.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 3 2011-01-01 2011-01-01 false Medicinal preparations. 160.89 Section 160.89... STANDARDS FOR NAVAL STORES Sales and Shipments § 160.89 Medicinal preparations. A compound or mixture containing spirits of turpentine or rosin, or both, with other drugs, when sold for medicinal purposes,...

  14. 7 CFR 160.89 - Medicinal preparations.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 3 2010-01-01 2010-01-01 false Medicinal preparations. 160.89 Section 160.89... STANDARDS FOR NAVAL STORES Sales and Shipments § 160.89 Medicinal preparations. A compound or mixture containing spirits of turpentine or rosin, or both, with other drugs, when sold for medicinal purposes,...

  15. 45 CFR 89.2 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 45 Public Welfare 1 2011-10-01 2011-10-01 false Definitions. 89.2 Section 89.2 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION ORGANIZATIONAL INTEGRITY OF ENTITIES IMPLEMENTING PROGRAMS AND ACTIVITIES UNDER THE LEADERSHIP ACT § 89.2 Definitions. For the purposes of this...

  16. 45 CFR 89.2 - Definitions.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 45 Public Welfare 1 2013-10-01 2013-10-01 false Definitions. 89.2 Section 89.2 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION ORGANIZATIONAL INTEGRITY OF ENTITIES IMPLEMENTING PROGRAMS AND ACTIVITIES UNDER THE LEADERSHIP ACT § 89.2 Definitions. For the purposes of this...

  17. 45 CFR 89.2 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 45 Public Welfare 1 2010-10-01 2010-10-01 false Definitions. 89.2 Section 89.2 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION ORGANIZATIONAL INTEGRITY OF ENTITIES IMPLEMENTING PROGRAMS AND ACTIVITIES UNDER THE LEADERSHIP ACT § 89.2 Definitions. For the purposes of this...

  18. 45 CFR 89.2 - Definitions.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 45 Public Welfare 1 2012-10-01 2012-10-01 false Definitions. 89.2 Section 89.2 Public Welfare DEPARTMENT OF HEALTH AND HUMAN SERVICES GENERAL ADMINISTRATION ORGANIZATIONAL INTEGRITY OF ENTITIES IMPLEMENTING PROGRAMS AND ACTIVITIES UNDER THE LEADERSHIP ACT § 89.2 Definitions. For the purposes of this...

  19. 45 CFR 89.2 - Definitions.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 45 Public Welfare 1 2014-10-01 2014-10-01 false Definitions. 89.2 Section 89.2 Public Welfare Department of Health and Human Services GENERAL ADMINISTRATION ORGANIZATIONAL INTEGRITY OF ENTITIES IMPLEMENTING PROGRAMS AND ACTIVITIES UNDER THE LEADERSHIP ACT § 89.2 Definitions. For the purposes of this...

  20. 40 CFR 745.89 - Firm certification.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 32 2012-07-01 2012-07-01 false Firm certification. 745.89 Section 745.89 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) TOXIC SUBSTANCES CONTROL ACT LEAD-BASED PAINT POISONING PREVENTION IN CERTAIN RESIDENTIAL STRUCTURES Residential Property Renovation § 745.89 Firm certification. (a)...

  1. 9 CFR 89.5 - Feeding pens.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 9 Animals and Animal Products 1 2010-01-01 2010-01-01 false Feeding pens. 89.5 Section 89.5... TWENTY-EIGHT HOUR LAW § 89.5 Feeding pens. (a) Stock pens and other enclosures for feeding, watering, and... pens are located. (b) Care should be taken to protect livestock unloaded en route at a point...

  2. 47 CFR 101.89 - Negotiations.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Negotiations. 101.89 Section 101.89 Telecommunication FEDERAL COMMUNICATIONS COMMISSION (CONTINUED) SAFETY AND SPECIAL RADIO SERVICES FIXED MICROWAVE SERVICES Applications and Licenses Policies Governing Fixed Service Relocation from the 18.58-19.30 Ghz Band § 101.89 Negotiations. (a)...

  3. 40 CFR 89.507 - Sample selection.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Sample selection. 89.507 Section 89... Auditing § 89.507 Sample selection. (a) Engines comprising a test sample will be selected at the location... cannot be selected in the manner specified in the test order, an alternative selection procedure may...

  4. 40 CFR 89.106 - Prohibited controls.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Prohibited controls. 89.106 Section 89...) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Emission Standards and Certification Provisions § 89.106 Prohibited controls. (a) An engine may not be equipped with an...

  5. 40 CFR 89.106 - Prohibited controls.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 20 2011-07-01 2011-07-01 false Prohibited controls. 89.106 Section 89...) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Emission Standards and Certification Provisions § 89.106 Prohibited controls. (a) An engine may not be equipped with an...

  6. 42 CFR 84.89 - Weight requirement.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 42 Public Health 1 2010-10-01 2010-10-01 false Weight requirement. 84.89 Section 84.89 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES OCCUPATIONAL SAFETY AND HEALTH RESEARCH AND RELATED ACTIVITIES APPROVAL OF RESPIRATORY PROTECTIVE DEVICES Self-Contained Breathing Apparatus § 84.89 Weight requirement. (a)...

  7. 40 CFR 146.89 - Mechanical integrity.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 23 2014-07-01 2014-07-01 false Mechanical integrity. 146.89 Section 146.89 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) WATER PROGRAMS (CONTINUED) UNDERGROUND INJECTION CONTROL PROGRAM: CRITERIA AND STANDARDS Criteria and Standards Applicable to Class VI Wells § 146.89 Mechanical integrity....

  8. 14 CFR 33.89 - Operation test.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 14 Aeronautics and Space 1 2013-01-01 2013-01-01 false Operation test. 33.89 Section 33.89... STANDARDS: AIRCRAFT ENGINES Block Tests; Turbine Aircraft Engines § 33.89 Operation test. (a) The operation test must include testing found necessary by the Administrator to demonstrate— (1) Starting,...

  9. 14 CFR 33.89 - Operation test.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 14 Aeronautics and Space 1 2014-01-01 2014-01-01 false Operation test. 33.89 Section 33.89... STANDARDS: AIRCRAFT ENGINES Block Tests; Turbine Aircraft Engines § 33.89 Operation test. (a) The operation test must include testing found necessary by the Administrator to demonstrate— (1) Starting,...

  10. 40 CFR 89.119 - Emission tests.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 21 2013-07-01 2013-07-01 false Emission tests. 89.119 Section 89.119... Provisions § 89.119 Emission tests. (a) Manufacturer testing. (1) Upon completion of service accumulation, the manufacturer must test each test engine using the specified test procedures, except as provided...

  11. 40 CFR 179.89 - Motions.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 24 2011-07-01 2011-07-01 false Motions. 179.89 Section 179.89... PUBLIC HEARING Hearing Procedures § 179.89 Motions. A motion, unless made in the course of a preliminary... by § 179.80 and include a draft order. A response may be filed within 10 days of service of a...

  12. 40 CFR 179.89 - Motions.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 25 2012-07-01 2012-07-01 false Motions. 179.89 Section 179.89... PUBLIC HEARING Hearing Procedures § 179.89 Motions. A motion, unless made in the course of a preliminary... by § 179.80 and include a draft order. A response may be filed within 10 days of service of a...

  13. 40 CFR 179.89 - Motions.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 24 2014-07-01 2014-07-01 false Motions. 179.89 Section 179.89... PUBLIC HEARING Hearing Procedures § 179.89 Motions. A motion, unless made in the course of a preliminary... by § 179.80 and include a draft order. A response may be filed within 10 days of service of a...

  14. 40 CFR 179.89 - Motions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 23 2010-07-01 2010-07-01 false Motions. 179.89 Section 179.89... PUBLIC HEARING Hearing Procedures § 179.89 Motions. A motion, unless made in the course of a preliminary... by § 179.80 and include a draft order. A response may be filed within 10 days of service of a...

  15. 40 CFR 179.89 - Motions.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 25 2013-07-01 2013-07-01 false Motions. 179.89 Section 179.89... PUBLIC HEARING Hearing Procedures § 179.89 Motions. A motion, unless made in the course of a preliminary... by § 179.80 and include a draft order. A response may be filed within 10 days of service of a...

  16. 14 CFR 151.89 - Roads.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 14 Aeronautics and Space 3 2010-01-01 2010-01-01 false Roads. 151.89 Section 151.89 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION (CONTINUED) AIRPORTS FEDERAL AID TO AIRPORTS Project Programming Standards § 151.89 Roads. (a) Federal-aid Airport Program...

  17. 7 CFR 993.89 - Effective time.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 8 2014-01-01 2014-01-01 false Effective time. 993.89 Section 993.89 Agriculture... Order Regulating Handling Miscellaneous Provisions § 993.89 Effective time. The provisions of this subpart, as well as any amendments to this subpart, shall become effective at such time as the...

  18. 7 CFR 993.89 - Effective time.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 8 2013-01-01 2013-01-01 false Effective time. 993.89 Section 993.89 Agriculture... Order Regulating Handling Miscellaneous Provisions § 993.89 Effective time. The provisions of this subpart, as well as any amendments to this subpart, shall become effective at such time as the...

  19. 40 CFR 89.207 - Credit calculation.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Credit calculation. 89.207 Section 89... Trading Provisions § 89.207 Credit calculation. (a) Requirements for calculating NO X credits from Tier 1... be used in the credit generation calculation described in paragraph (a)(1)(i) of this section. If...

  20. 31 CFR 306.89 - Public officers.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 31 Money and Finance:Treasury 2 2013-07-01 2013-07-01 false Public officers. 306.89 Section 306.89..., DEPARTMENT OF THE TREASURY BUREAU OF THE PUBLIC DEBT GENERAL REGULATIONS GOVERNING U.S. SECURITIES Assignments in Behalf of Private or Public Organizations § 306.89 Public officers. Securities registered...

  1. 40 CFR 89.107 - Defeat devices.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 20 2011-07-01 2011-07-01 false Defeat devices. 89.107 Section 89.107... Provisions § 89.107 Defeat devices. (a) An engine may not be equipped with a defeat device. (b) For purposes of this section, “defeat device” means any device, system, or element of design which...

  2. 40 CFR 89.1 - Applicability.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 21 2012-07-01 2012-07-01 false Applicability. 89.1 Section 89.1 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES General § 89.1 Applicability. (a) This part applies for all...

  3. 40 CFR 89.902 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 20 2011-07-01 2011-07-01 false Definitions. 89.902 Section 89.902 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Exemption Provisions § 89.902...

  4. 40 CFR 89.4 - [Reserved

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false 89.4 Section 89.4 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES General § 89.4...

  5. 40 CFR 89.4 - [Reserved

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 20 2011-07-01 2011-07-01 false 89.4 Section 89.4 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES General § 89.4...

  6. 40 CFR 89.701 - Applicability.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Applicability. 89.701 Section 89.701 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Recall Regulations § 89.701...

  7. 40 CFR 89.702 - Definitions.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 20 2014-07-01 2013-07-01 true Definitions. 89.702 Section 89.702 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Recall Regulations § 89.702...

  8. 40 CFR 89.701 - Applicability.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 20 2011-07-01 2011-07-01 false Applicability. 89.701 Section 89.701 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Recall Regulations § 89.701...

  9. 40 CFR 89.702 - Definitions.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 21 2013-07-01 2013-07-01 false Definitions. 89.702 Section 89.702 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Recall Regulations § 89.702...

  10. 40 CFR 89.701 - Applicability.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 21 2013-07-01 2013-07-01 false Applicability. 89.701 Section 89.701 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Recall Regulations § 89.701...

  11. 40 CFR 89.702 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Definitions. 89.702 Section 89.702 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Recall Regulations § 89.702...

  12. 40 CFR 89.701 - Applicability.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 21 2012-07-01 2012-07-01 false Applicability. 89.701 Section 89.701 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Recall Regulations § 89.701...

  13. 40 CFR 89.702 - Definitions.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 21 2012-07-01 2012-07-01 false Definitions. 89.702 Section 89.702 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Recall Regulations § 89.702...

  14. 40 CFR 89.702 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 20 2011-07-01 2011-07-01 false Definitions. 89.702 Section 89.702 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Recall Regulations § 89.702...

  15. 40 CFR 89.701 - Applicability.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 20 2014-07-01 2013-07-01 true Applicability. 89.701 Section 89.701 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Recall Regulations § 89.701...

  16. 14 CFR 33.89 - Operation test.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 14 Aeronautics and Space 1 2011-01-01 2011-01-01 false Operation test. 33.89 Section 33.89 Aeronautics and Space FEDERAL AVIATION ADMINISTRATION, DEPARTMENT OF TRANSPORTATION AIRCRAFT AIRWORTHINESS STANDARDS: AIRCRAFT ENGINES Block Tests; Turbine Aircraft Engines § 33.89 Operation test. (a) The...

  17. 7 CFR 956.89 - Compliance.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 8 2011-01-01 2011-01-01 false Compliance. 956.89 Section 956.89 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements... VALLEY OF SOUTHEAST WASHINGTON AND NORTHEAST OREGON Miscellaneous Provisions § 956.89 Compliance....

  18. 7 CFR 956.89 - Compliance.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 8 2013-01-01 2013-01-01 false Compliance. 956.89 Section 956.89 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (MARKETING AGREEMENTS... VALLEY OF SOUTHEAST WASHINGTON AND NORTHEAST OREGON Miscellaneous Provisions § 956.89 Compliance....

  19. 7 CFR 956.89 - Compliance.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 8 2014-01-01 2014-01-01 false Compliance. 956.89 Section 956.89 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (MARKETING AGREEMENTS... VALLEY OF SOUTHEAST WASHINGTON AND NORTHEAST OREGON Miscellaneous Provisions § 956.89 Compliance....

  20. 7 CFR 956.89 - Compliance.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 8 2012-01-01 2012-01-01 false Compliance. 956.89 Section 956.89 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements... VALLEY OF SOUTHEAST WASHINGTON AND NORTHEAST OREGON Miscellaneous Provisions § 956.89 Compliance....

  1. 36 CFR 9.89 - Appeals.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 36 Parks, Forests, and Public Property 1 2011-07-01 2011-07-01 false Appeals. 9.89 Section 9.89 Parks, Forests, and Public Property NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT Alaska Mineral Resource Assessment Program § 9.89 Appeals. Written appeals made within 30 days...

  2. 36 CFR 9.89 - Appeals.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 36 Parks, Forests, and Public Property 1 2010-07-01 2010-07-01 false Appeals. 9.89 Section 9.89 Parks, Forests, and Public Property NATIONAL PARK SERVICE, DEPARTMENT OF THE INTERIOR MINERALS MANAGEMENT Alaska Mineral Resource Assessment Program § 9.89 Appeals. Written appeals made within 30 days...

  3. 21 CFR 1250.89 - Swimming pools.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... 21 Food and Drugs 8 2010-04-01 2010-04-01 false Swimming pools. 1250.89 Section 1250.89 Food and... SANITATION Sanitation Facilities and Conditions on Vessels § 1250.89 Swimming pools. (a) Fill and draw swimming pools shall not be installed or used. (b) Swimming pools of the recirculation type shall...

  4. 29 CFR 1960.89 - Organization.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 29 Labor 9 2010-07-01 2010-07-01 false Organization. 1960.89 Section 1960.89 Labor Regulations Relating to Labor (Continued) OCCUPATIONAL SAFETY AND HEALTH ADMINISTRATION, DEPARTMENT OF LABOR (CONTINUED... Field Federal Safety and Health Councils § 1960.89 Organization. (a) Field council officers...

  5. Structure and transport behavior of In-filled cobalt rhodium antimonide skutterudites

    SciTech Connect

    Eilertsen, James; Berthelot, Romain; Sleight, Arthur W.; Subramanian, M.A.

    2012-06-15

    The effect of indium icosahedral void-site filling on the transport properties of cobalt and rhodium antimonide solid solutions is investigated. Co{sub 4-x}Rh{sub x}Sb{sub 12} and indium-filled In{sub 0.1}Co{sub 4-x}Rh{sub x}Sb{sub 12} solid solutions were synthesized. Partial rhodium substitution produces a distinct clustering-induced lattice strain that is partly relieved upon indium substitution into the skutterudite icosahedral void-sites. Indium lowers the thermal conductivity of all samples near room temperature. A distinct increase in thermal conductivity is observed in all indium-filled rhodium substituted samples at elevated temperatures and is attributed to bipolar thermal conductivity. In addition, the indium-filled samples were subjected to a 6-day heat treatment at 673 K. Void-site filled indium was found to be metastable at this temperature, and was found to partially precipitate during the 6-day heat treatment; thereby presenting concerns over the long-term stability of thermoelectric devices based on indium-filled skutterudites. - Graphical Abstract: Strain in the cobalt rhodium skutterudite solid solutions decreases upon indium filling. Highlights: Black-Right-Pointing-Pointer Unfilled and indium-filled cobalt and rhodium skutterudite solid solutions were synthesized. Black-Right-Pointing-Pointer Indium filling stabilizes the cobalt and rhodium skutterudite solid solutions. Black-Right-Pointing-Pointer The thermoelectric properties of all compositions are reported. Black-Right-Pointing-Pointer The thermal conductivity of rhodium-rich compositions is strongly affected by indium filling. Black-Right-Pointing-Pointer Void-site filled indium was found to be metastable.

  6. Rhodium mediated bond activation: from synthesis to catalysis

    SciTech Connect

    Ho, Hung-An

    2012-01-01

    Recently, our lab has developed monoanionic tridentate ligand, ToR, showing the corresponding coordination chemistry and catalyst reactivity of magnesium, zirconium, zinc and iridium complexes. This thesis details synthetic chemistry, structural study and catalytic reactivity of the ToR-supported rhodium compounds. Tl[ToR] has been proved to be a superior ligand transfer agent for synthesizing rhodium complexes. The salt metathesis route of Tl[ToM] with [Rh(μ-Cl)(CO)]2 and [Rh(μ- Cl)(COE)]2 gives ToMRh(CO)2 (2.2) and ToMRhH(β3-C8H13) (3.1) respectively while Tl[ToM] with [Rh(μ-Cl)(CO)]2 affords ToPRh(CO)2 (2.3). 2.2 reacts with both strong and weak electrophiles, resulting in the oxazoline N-attacked and the metal center-attacked compounds correspondingly. Using one of the metal center-attacked electrophiles, 2.3 was demonstrated to give high diastereoselectivity. Parallel to COE allylic C-H activation complex 3.1, the propene and allylbenzene allylic C-H activation products have also been synthesized. The subsequent functionalization attempts have been examined by treating with Brønsted acids, Lewis acids, electrophiles, nucleophiles, 1,3-dipolar reagents and reagents containing multiple bonds able to be inserted. Various related complexes have been obtained under these conditions, in which one of the azide insertion compounds reductively eliminates to give an allylic functionalization product stoichiometrically. 3.1 reacts with various primary alcohols to give the decarbonylation dihydride complex ToMRh(H)2CO (4.1). 4.1 shows catalytic reactivity for primary alcohol decarbonylation under a photolytic condition. Meanwhile, 2.2 has been found to be more reactive than 4.1 for catalytic alcohol decarbonylation under the same condition. Various complexes and primary

  7. X-ray photoelectron spectroscopy as a probe of rhodium-ligand interaction in ionic liquids

    NASA Astrophysics Data System (ADS)

    Men, Shuang; Lovelock, Kevin R. J.; Licence, Peter

    2016-02-01

    We use X-ray photoelectron spectroscopy (XPS) to identify the interaction between the rhodium atom and phosphine ligands in six 1-octyl-3-methylimidazolium-based ionic liquids ([C8C1Im][X]). The formation of a mono-phosphine rhodium complex based upon addition of triphenylphosphine (PPh3) is confirmed by XPS in all ionic liquids studied herein. Due to the electron donation effect of the ligand, the rhodium atom becomes more negatively charged and thus exhibits a lower measured binding energy. The influence of the anion basicity on the formation of different types of rhodium complexes is also investigated. By introducing a biphosphine ligand, a chelated diphosphine rhodium complex is formed in ionic liquids with more basic anions and verified by both XPS and Infrared Spectroscopy (IR). The measured Rh 3d binding energies are correlated to the reaction selectivity of a hydroformylation reaction which inspires a method to design a metal catalyst to control the chemical reaction towards desired products in the future.

  8. Branching Out: Rhodium-Catalyzed Allylation with Alkynes and Allenes.

    PubMed

    Koschker, Philipp; Breit, Bernhard

    2016-08-16

    We present a new and efficient strategy for the atom-economic transformation of both alkynes and allenes to allylic functionalized structures via a Rh-catalyzed isomerization/addition reaction which has been developed in our working group. Our methodology thus grants access to an important structural class valued in modern organic chemistry for both its versatility for further functionalization and the potential for asymmetric synthesis with the construction of a new stereogenic center. This new methodology, inspired by mechanistic investigations by Werner in the late 1980s and based on preliminary work by Yamamoto and Trost, offers an attractive alternative to other established methods for allylic functionalization such as allylic substitution or allylic oxidation. The main advantage of our methodology consists of the inherent atom economy in comparison to allylic oxidation or substitution, which both produce stoichiometric amounts of waste and, in case of the substitution reaction, require prefunctionalization of the starting material. Starting out with the discovery of a highly branched-selective coupling reaction of carboxylic acids with terminal alkynes using a Rh(I)/DPEphos complex as the catalyst system, over the past 5 years we were able to continuously expand upon this chemistry, introducing various (pro)nucleophiles for the selective C-O, C-S, C-N, and C-C functionalization of both alkynes and the double-bond isomeric allenes by choosing the appropriate rhodium/bidentate phosphine catalyst. Thus, valuable compounds such as branched allylic ethers, sulfones, amines, or γ,δ-unsaturated ketones were successfully synthesized in high yields and with a broad substrate scope. Beyond the branched selectivity inherent to rhodium, many of the presented methodologies display additional degrees of selectivity in regard to regio-, diastereo-, and enantioselective transformations, with one example even proceeding via a dynamic kinetic resolution. Many advances

  9. In situ dynamic study of hydrogen oxidation on rhodium.

    PubMed

    Visart de Bacarmé, T; Bär, T; Kruse, N

    2001-10-01

    The reaction of hydrogen/oxygen gas mixtures with rhodium single crystals was studied using video-FIM (Field Ion Microscopy) at temperatures between 350 and 550 K and up to 2 x 10(-2) Pa total pressure. Imaging at 500 K in a hydrogen rich gas mixture (H2:O2 = 9) revealed considerable morphological changes of the (0 0 1)-oriented field emitter tip, i.e. the growth of low-index at the expense of high-index planes and strong crystal coarsening. Decreasing the hydrogen partial pressure led to chemical and structural changes of the Rh sample. Starting on the [1 1 0] planes a surface oxide formed, which spread anisotropically across the surface until it finally covered the whole visible surface area. The transformation was reversible upon increasing the hydrogen pressure back to its initial value. However, a hysteresis behavior was observed, i.e. a larger hydrogen partial pressure was found to be necessary to re-establish the initial patterns of a reactive Oad/Had layer. By varying the temperature from 400 to 500 K a phase diagram was established for the Oad/Had system. Increasing the electric field proved to shift the phase diagram towards higher H2 pressures. At 550K self-sustained kinetic oscillations with a cycle time of approximately 40s could be observed. PMID:11770755

  10. Monodisperse Platinum and Rhodium Nanoparticles as Model Heterogeneous Catalysts

    SciTech Connect

    Grass, Michael Edward

    2008-09-01

    Model heterogeneous catalysts have been synthesized and studied to better understand how the surface structure of noble metal nanoparticles affects catalytic performance. In this project, monodisperse rhodium and platinum nanoparticles of controlled size and shape have been synthesized by solution phase polyol reduction, stabilized by polyvinylpyrrolidone (PVP). Model catalysts have been developed using these nanoparticles by two methods: synthesis of mesoporous silica (SBA-15) in the presence of nanoparticles (nanoparticle encapsulation, NE) to form a composite of metal nanoparticles supported on SBA-15 and by deposition of the particles onto a silicon wafer using Langmuir-Blodgett (LB) monolayer deposition. The particle shapes were analyzed by transmission electron microscopy (TEM) and high resolution TEM (HRTEM) and the sizes were determined by TEM, X-ray diffraction (XRD), and in the case of NE samples, room temperature H2 and CO adsorption isotherms. Catalytic studies were carried out in homebuilt gas-phase reactors. For the nanoparticles supported on SBA-15, the catalysts are in powder form and were studied using the homebuilt systems as plug-flow reactors. In the case of nanoparticles deposited on silicon wafers, the same systems were operated as batch reactors. This dissertation has focused on the synthesis, characterization, and reaction studies of model noble metal heterogeneous catalysts. Careful control of particle size and shape has been accomplished though solution phase synthesis of Pt and Rh nanoparticles in order to elucidate further structure-reactivity relationships in noble metal catalysis.

  11. Binuclear Rhodium(II) Complexes With Selective Antibacterial Activity.

    PubMed

    Bień, M; Lachowicz, T M; Rybka, A; Pruchnik, F P; Trynda, L

    1997-01-01

    Binuclear rhodium(II) complexes [Rh(2)Cl(2)(mu-OOCR)(2)(N-N)(2)] {R = H, Me; N-N = 2,2'-bipyridine (bpy), 1,10-phenanthroline (phen)} and [Rh(2)(mu-OOCR)(2)(N-N)(2)(H(2)O)(2)](RCOO)(2) (R = Me, Et;) have been synthesized and their structure and properties have been studied by electronic, IR and (1)H NMR spectroscopy. Antibacterial activity of these complexes against Escherichia coli and Staphylococcus aureus has been investigated. The most active antibacterial agents against E. coli were [Rh(2)Cl(2)(mu-OOCR)(2)(N-N)(2)] and [Rh(2)(mu-OOCR)(2)(N-N)(2)(H(2)O)(2)](RCOO)(2) {R = H and Me} which were considerably more active than the appropriate nitrogen ligands. The complexes show low activity against S. aureus. The activity of the complexes [Rh(2)(OOCR)(2)(N-N)(2)(H(2)O)(2)](OOCR)(2) against E. coli decreases in the series: R=H congruent withCH(3)>C(2)H(5)>C(3)H(7) congruent withC(4)H(9). The reverse order was found in the case of S. aureus. PMID:18475773

  12. Rh2(CF3CONH)4: The First Biological Assays of a Rhodium (II) Amidate

    PubMed Central

    Zyngier, Szulim Ber; de Souza, Aparecido Ribeiro; Najjar, Renato

    1997-01-01

    The rhodium (II) complexes Rh2(tfa)4.2(tfac) and Rh2(tfacam)4 (tfacam = CF3CONH-,tfa = CF3COO-,tfac = CF3CONH2) were synthesized and characterized by microanalysis and electronic and vibrational spectroscopies. Rh2(tfacam)4 was tested both in vitro (U937 and K562 human leukemia cells and Ehrlich ascitic tumor cells) and in vivo for cytostatic activity and lethal dose determination, respectively. This is the first rhodium tetra-amidate to have its biological activity evaluated. The LD50 value for Rh2(tfacam)4 is of the same order as that of cisplatin, and it was verified that the rhodium complex usually needs lower doses than cisplatin to promote the same inhibitory effects. PMID:18475814

  13. Microstructure and oxidation behaviour investigation of rhodium modified aluminide coating deposited on CMSX 4 superalloy.

    PubMed

    Zagula-Yavorska, Maryana; Morgiel, Jerzy; Romanowska, Jolanta; Sieniawski, Jan

    2016-03-01

    The CMSX 4 superalloy was coated with rhodium 0.5-μm thick layer and next aluminized by the CVD method. The coating consisted of two layers: the additive and the interdiffusion one. The outward diffusion of nickel from the substrate turned out to be a coating growth dominating factor. The additive layer consists of the β-NiAl phase, whereas the interdiffusion layer consists of the β-NiAl phase with precipitates of σ and μ phases. Rhodium has dissolved in the coating up to the same level in the matrix and in the precipitates. The oxidation test proved that the rhodium modified aluminide coating showed about twice better oxidation resistance than the nonmodified one. PMID:26892917

  14. Complexes of ruthenium and rhodium with aliphatic amines in the catalysis of hydrogenation of unsaturated hydrocarbons

    SciTech Connect

    Turisbekova, K.K.; Shuikina, L.P.; Parenago, O.P.; Frolov, V.F.

    1989-02-01

    The authors synthesized new catalysts highly active in the hydrogenations of unsaturated hydrocarbons, based on complexes of ruthenium and rhodium with higher aliphatic amines, which are soluble in aromatic solvents. The complexes acquired catalytic activity in hydrogenation as a result of their treatment with diisobutyl aluminum hydride. Olefins (1-hexene, cyclopentene, cyclohexene) or dienes (isoprene) were used as the unsaturated compounds. For the ruthenium based catalysts, the highest activity was observed during the hydrogenation of 1-hexene. For the rhodium-based catalysts, the activity in the hydrogenation of olefins and dienes was approximately the same. In the case of the rhodium complex catalysts, the hydrogenation of 1-hexene was accompanied by a side-reaction consisting in isomerization into olefins with inner double bonds.

  15. A solid-state NMR investigation of the structure of mesoporous silica nanoparticle supported rhodium catalysts

    SciTech Connect

    Rapp, Jennifer; Huang, Yulin; Natella, Michael; Cai, Yang; Lin, Victor S.-Y.; Pruski, Marek

    2009-01-04

    A detailed study of the chemical structure of mesoporous silica catalysts containing rhodium ligands and nanoparticles (RhP-MSN) was carried out by multi-dimensional solid-state NMR techniques. The degree of functionalization of the rhodium-phosphinosilyl complex to the surface of the RhP-MSN channels was determined by {sup 29}Si NMR experiments. The structural assignments of the rhodium-phosphinosilyl complex were unambiguously determined by employing the novel, indirectly detected heteronuclear correlation ({sup 13}C-{sup 1}H and {sup 31}P-{sup 1}H idHETCOR) techniques, which indicated that oxidation of the attached phosphinosilyl groups and detachment of Rh was enhanced upon syngas conversion.

  16. Asymmetric Synthesis of Hydrocarbazoles Catalyzed by an Octahedral Chiral-at-Rhodium Lewis Acid.

    PubMed

    Huang, Yong; Song, Liangliang; Gong, Lei; Meggers, Eric

    2015-12-01

    A bis-cyclometalated chiral-at-metal rhodium complex catalyzes the Diels-Alder reaction between N-Boc-protected 3-vinylindoles (Boc = tert-butyloxycarbonyl) and β-carboxylic ester-substituted α,β-unsaturated 2-acyl imidazoles with good-to-excellent regioselectivity (up to 99:1) and excellent diastereoselectivity (>50:1 d.r.) as well as enantioselectivity (92-99% ee) under optimized conditions. The rhodium catalyst serves as a chiral Lewis acid to activate the 2-acyl imidazole dienophile by two-point binding and overrules the preferred regioselectivity of the uncatalyzed reaction. PMID:26344422

  17. Geometric effects on the mechanical strengths of strong nanocrystalline rhodium sub-micron structures

    NASA Astrophysics Data System (ADS)

    Tsui, Ting Y.; Jahed, Zeinab; Evans, R. D.; Burek, Michael J.

    2015-06-01

    Sub-micron scale nanocrystalline rhodium pillars were fabricated by electron beam lithography and electroplating techniques. The fabricated specimens included solid core pillars and columnar structure with more complex cross-sectional geometries, including x-shaped and annulus shaped. Among these specimens, two groups of sub-micron scale annulus structures with sidewall thicknesses of 250 and 205 nm were fabricated. All of the structures have outer diameters of ~1 μm and consist of average grain size smaller than 22 nm. Uniaxial compression results reveal these rhodium pillars are very strong with true flow stresses exceeding 5 GPa and are not sensitive to the sample cross-sectional geometries.

  18. Probing the structures of gas-phase rhodium cluster cations by far-infrared spectroscopy

    SciTech Connect

    Harding, D. J.; Gruene, P.; Haertelt, M.; Meijer, G.; Fielicke, A.; Hamilton, S. M.; Hopkins, W. S.; Mackenzie, S. R.; Neville, S. P.; Walsh, T. R.

    2010-12-07

    The geometric structures of small cationic rhodium clusters Rh{sub n}{sup +} (n = 6-12) are investigated by comparison of experimental far-infrared multiple photon dissociation spectra with spectra calculated using density functional theory. The clusters are found to favor structures based on octahedral and tetrahedral motifs for most of the sizes considered, in contrast to previous theoretical predictions that rhodium clusters should favor cubic motifs. Our findings highlight the need for further development of theoretical and computational methods to treat these high-spin transition metal clusters.

  19. Rhodium-catalyzed C-C coupling reactions via double C-H activation.

    PubMed

    Li, Shuai-Shuai; Qin, Liu; Dong, Lin

    2016-05-18

    Various rhodium-catalyzed double C-H activations are reviewed. These powerful strategies have been developed to construct C-C bonds, which might be widely embedded in complex aza-fused heterocycles, polycyclic skeletons and heterocyclic scaffolds. In particular, rhodium(iii) catalysis shows good selectivity and reactivity to functionalize the C-H bond, generating reactive organometallic intermediates in most of the coupling reactions. Generally, intermolecular, intramolecular and multi-component coupling reactions via double C-H activations with or without heteroatom-assisted chelation are discussed in this review. PMID:27099126

  20. Chiral Phosphate in Rhodium-Catalyzed Asymmetric [2+2+2] Cycloaddition: Ligand, Counterion, or Both?

    PubMed

    Barbazanges, Marion; Caytan, Elsa; Lesage, Denis; Aubert, Corinne; Fensterbank, Louis; Gandon, Vincent; Ollivier, Cyril

    2016-06-13

    Investigations based on NMR spectroscopy, mass spectrometry, and DFT calculations shed light on the metallic species generated in the rhodium-catalyzed asymmetric [2+2+2] cycloaddition reaction between diynes and isocyanates with the chiral phosphate TRIP. The catalytic mixture comprising [{Rh(cod)Cl}2 ], 1,4-diphenylphosphinobutane (dppb), and Ag(S)-TRIP actually gives rise to two species, both having an effect on the stereoselectivity. One is a rhodium(I) complex in which TRIP is a weakly coordinating counterion, whereas the other is a bimetallic Rh/Ag complex in which TRIP is a strongly coordinating X-type ligand. PMID:27167983

  1. Rhodium-Catalyzed Geminal Oxyfluorination and Oxytrifluoro-Methylation of Diazocarbonyl Compounds.

    PubMed

    Yuan, Weiming; Eriksson, Lars; Szabó, Kálmán J

    2016-07-11

    A new reaction for the rhodium-catalyzed geminal-difunctionalization-based fluorination is presented. The substrates are aromatic and aliphatic diazocarbonyl compounds. As the fluorine source a stable and easily accessible benziodoxole reagent was used. A variety of alcohol, phenol, and carboxylic acid reagents were employed to introduce the second functionality. The reaction was extended to trifluoromethylation using a benziodoxolon reagent. The fluorination and trifluoromethylation reactions probably proceed by a rhodium-containing onium ylide type intermediate, which is trapped by either the F or CF3 electrophiles. PMID:27219856

  2. Tandem rhodium catalysis:Exploiting sulfoxides for asymmetric transition-metal catalysis

    PubMed Central

    Kou, K. G. M.

    2015-01-01

    Sulfoxides are uncommon substrates for transition-metal catalysis due to their propensity to inhibit catalyst turnover. In a collaborative effort with Ken Houk, we developed the first dynamic kinetic resolution (DKR) of allylic sulfoxides using asymmetric rhodium-catalyzed hydrogenation. Detailed mechanistic analysis of this transformation using both experimental and theoretical methods revealed rhodium to be a tandem catalyst that promoted both hydrogenation of the alkene and racemization of the allylic sulfoxide. Using a combination of deuterium labelling and DFT studies, a novel mode of allylic sulfoxide racemization via a Rh(III)-π-allyl intermediate was identified. PMID:25940066

  3. Reductive Coupling of Diynes at Rhodium Gives Fluorescent Rhodacyclopentadienes or Phosphorescent Rhodium 2,2'-Biphenyl Complexes.

    PubMed

    Sieck, Carolin; Tay, Meng Guan; Thibault, Marie-Hélène; Edkins, Robert M; Costuas, Karine; Halet, Jean-François; Batsanov, Andrei S; Haehnel, Martin; Edkins, Katharina; Lorbach, Andreas; Steffen, Andreas; Marder, Todd B

    2016-07-18

    Reactions of [Rh(κ(2) -O,O-acac)(PMe3 )2 ] (acac=acetylacetonato) and α,ω-bis(arylbutadiynyl)alkanes afford two isomeric types of MC4 metallacycles with very different photophysical properties. As a result of a [2+2] reductive coupling at Rh, 2,5-bis(arylethynyl)rhodacyclopentadienes (A) are formed, which display intense fluorescence (Φ=0.07-0.54, τ=0.2-2.5 ns) despite the presence of the heavy metal atom. Rhodium biphenyl complexes (B), which show exceptionally long-lived (hundreds of μs) phosphorescence (Φ=0.01-0.33) at room temperature in solution, have been isolated as a second isomer originating from an unusual [4+2] cycloaddition reaction and a subsequent β-H-shift. We attribute the different photophysical properties of isomers A and B to a higher excited state density and a less stabilized T1 state in the biphenyl complexes B, allowing for more efficient intersystem crossing S1 →Tn and T1 →S0 . Control of the isomer distribution is achieved by modification of the bis- (diyne) linker length, providing a fundamentally new route to access photoactive metal biphenyl compounds. PMID:27355689

  4. 40 CFR 89.501 - Applicability.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Applicability. 89.501 Section 89.501 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Selective Enforcement Auditing §...

  5. 40 CFR 89.502 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Definitions. 89.502 Section 89.502 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Selective Enforcement Auditing §...

  6. 12 CFR 238.89 - Board action.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 12 Banks and Banking 4 2013-01-01 2013-01-01 false Board action. 238.89 Section 238.89 Banks and Banking FEDERAL RESERVE SYSTEM (CONTINUED) BOARD OF GOVERNORS OF THE FEDERAL RESERVE SYSTEM (CONTINUED) SAVINGS AND LOAN HOLDING COMPANIES (REGULATION LL) Prohibited Service at Savings and Loan...

  7. 12 CFR 238.89 - Board action.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 12 Banks and Banking 4 2014-01-01 2014-01-01 false Board action. 238.89 Section 238.89 Banks and Banking FEDERAL RESERVE SYSTEM (CONTINUED) BOARD OF GOVERNORS OF THE FEDERAL RESERVE SYSTEM (CONTINUED) SAVINGS AND LOAN HOLDING COMPANIES (REGULATION LL) Prohibited Service at Savings and Loan...

  8. 12 CFR 238.89 - Board action.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 12 Banks and Banking 4 2012-01-01 2012-01-01 false Board action. 238.89 Section 238.89 Banks and Banking FEDERAL RESERVE SYSTEM (CONTINUED) BOARD OF GOVERNORS OF THE FEDERAL RESERVE SYSTEM (CONTINUED) SAVINGS AND LOAN HOLDING COMPANIES (REGULATION LL) Prohibited Service at Savings and Loan...

  9. 40 CFR 89.202 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Definitions. 89.202 Section 89.202 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Averaging, Banking, and...

  10. 40 CFR 89.402 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... part, the definitions in 40 CFR part 86, subparts A, D, I, and N, apply to this subpart. ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Definitions. 89.402 Section 89.402 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL...

  11. 40 CFR 89.1002 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Definitions. 89.1002 Section 89.1002 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES General Enforcement Provisions...

  12. 40 CFR 89.802 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Definitions. 89.802 Section 89.802 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Emission Defect Reporting...

  13. 40 CFR 89.103 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Definitions. 89.103 Section 89.103 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Emission Standards and...

  14. 40 CFR 89.302 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... defined in this part, the definitions in 40 CFR part 86, subparts A, D, I, and N, apply to this subpart. ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Definitions. 89.302 Section 89.302 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL...

  15. 20 CFR 632.89 - Performance standards.

    Code of Federal Regulations, 2011 CFR

    2011-04-01

    ... 20 Employees' Benefits 3 2011-04-01 2011-04-01 false Performance standards. 632.89 Section 632.89 Employees' Benefits EMPLOYMENT AND TRAINING ADMINISTRATION, DEPARTMENT OF LABOR INDIAN AND NATIVE AMERICAN... of Labor shall establish performance standards for all Native American grantees (section...

  16. 36 CFR 251.89 - Time extensions.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 36 Parks, Forests, and Public Property 2 2011-07-01 2011-07-01 false Time extensions. 251.89... Appeal of Decisions Relating to Occupancy and Use of National Forest System Lands § 251.89 Time extensions. (a) Filing of notice of appeal. Time for filing a notice of appeal is not extendable. (b)...

  17. 40 CFR 89.503 - Test orders.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 20 2011-07-01 2011-07-01 false Test orders. 89.503 Section 89.503... Test orders. (a) A test order addressed to the manufacturer is required for any testing under this subpart. (b) The test order is signed by the Assistant Administrator for Air and Radiation or his or...

  18. 42 CFR 32.89 - Discharge.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 42 Public Health 1 2014-10-01 2014-10-01 false Discharge. 32.89 Section 32.89 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES MEDICAL CARE AND EXAMINATIONS MEDICAL CARE FOR... Discharge. Patients with Hansen's disease will be discharged when, in the opinion of the medical staff...

  19. 42 CFR 32.89 - Discharge.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 42 Public Health 1 2012-10-01 2012-10-01 false Discharge. 32.89 Section 32.89 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES MEDICAL CARE AND EXAMINATIONS MEDICAL CARE FOR... Discharge. Patients with Hansen's disease will be discharged when, in the opinion of the medical staff...

  20. 42 CFR 32.89 - Discharge.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 42 Public Health 1 2013-10-01 2013-10-01 false Discharge. 32.89 Section 32.89 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES MEDICAL CARE AND EXAMINATIONS MEDICAL CARE FOR... Discharge. Patients with Hansen's disease will be discharged when, in the opinion of the medical staff...

  1. 42 CFR 32.89 - Discharge.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 42 Public Health 1 2011-10-01 2011-10-01 false Discharge. 32.89 Section 32.89 Public Health PUBLIC HEALTH SERVICE, DEPARTMENT OF HEALTH AND HUMAN SERVICES MEDICAL CARE AND EXAMINATIONS MEDICAL CARE FOR... Discharge. Patients with Hansen's disease will be discharged when, in the opinion of the medical staff...

  2. 9 CFR 89.5 - Feeding pens.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 9 Animals and Animal Products 1 2011-01-01 2011-01-01 false Feeding pens. 89.5 Section 89.5 Animals and Animal Products ANIMAL AND PLANT HEALTH INSPECTION SERVICE, DEPARTMENT OF AGRICULTURE INTERSTATE TRANSPORTATION OF ANIMALS (INCLUDING POULTRY) AND ANIMAL PRODUCTS STATEMENT OF POLICY UNDER...

  3. 40 CFR 89.909 - Export exemptions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Export exemptions. 89.909 Section 89....909 Export exemptions. (a) A new nonroad engine intended solely for export, and so labeled or tagged..., 1200 Pennsylvania Ave., NW., Washington, DC 20460. New nonroad engines exported to such countries...

  4. 7 CFR 981.89 - Agents.

    Code of Federal Regulations, 2013 CFR

    2013-01-01

    ... 7 Agriculture 8 2013-01-01 2013-01-01 false Agents. 981.89 Section 981.89 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (MARKETING AGREEMENTS AND ORDERS; FRUITS, VEGETABLES, NUTS), DEPARTMENT OF AGRICULTURE ALMONDS GROWN IN CALIFORNIA Order...

  5. 7 CFR 981.89 - Agents.

    Code of Federal Regulations, 2011 CFR

    2011-01-01

    ... 7 Agriculture 8 2011-01-01 2011-01-01 false Agents. 981.89 Section 981.89 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements and Orders; Fruits, Vegetables, Nuts), DEPARTMENT OF AGRICULTURE ALMONDS GROWN IN CALIFORNIA Order...

  6. 7 CFR 981.89 - Agents.

    Code of Federal Regulations, 2014 CFR

    2014-01-01

    ... 7 Agriculture 8 2014-01-01 2014-01-01 false Agents. 981.89 Section 981.89 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (MARKETING AGREEMENTS AND ORDERS; FRUITS, VEGETABLES, NUTS), DEPARTMENT OF AGRICULTURE ALMONDS GROWN IN CALIFORNIA Order...

  7. 7 CFR 981.89 - Agents.

    Code of Federal Regulations, 2012 CFR

    2012-01-01

    ... 7 Agriculture 8 2012-01-01 2012-01-01 false Agents. 981.89 Section 981.89 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements and Orders; Fruits, Vegetables, Nuts), DEPARTMENT OF AGRICULTURE ALMONDS GROWN IN CALIFORNIA Order...

  8. 7 CFR 981.89 - Agents.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 8 2010-01-01 2010-01-01 false Agents. 981.89 Section 981.89 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements and Orders; Fruits, Vegetables, Nuts), DEPARTMENT OF AGRICULTURE ALMONDS GROWN IN CALIFORNIA Order...

  9. 7 CFR 966.89 - Derogation.

    Code of Federal Regulations, 2010 CFR

    2010-01-01

    ... 7 Agriculture 8 2010-01-01 2010-01-01 false Derogation. 966.89 Section 966.89 Agriculture Regulations of the Department of Agriculture (Continued) AGRICULTURAL MARKETING SERVICE (Marketing Agreements and Orders; Fruits, Vegetables, Nuts), DEPARTMENT OF AGRICULTURE TOMATOES GROWN IN FLORIDA...

  10. 36 CFR 251.89 - Time extensions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 36 Parks, Forests, and Public Property 2 2010-07-01 2010-07-01 false Time extensions. 251.89... Appeal of Decisions Relating to Occupancy and Use of National Forest System Lands § 251.89 Time extensions. (a) Filing of notice of appeal. Time for filing a notice of appeal is not extendable. (b)...

  11. 40 CFR 89.501 - Applicability.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 20 2014-07-01 2013-07-01 true Applicability. 89.501 Section 89.501 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Selective Enforcement Auditing §...

  12. 40 CFR 89.507 - Sample selection.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 20 2014-07-01 2013-07-01 true Sample selection. 89.507 Section 89.507 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Selective Enforcement Auditing §...

  13. 40 CFR 89.501 - Applicability.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 20 2011-07-01 2011-07-01 false Applicability. 89.501 Section 89.501 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Selective Enforcement Auditing §...

  14. 40 CFR 89.502 - Definitions.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 21 2013-07-01 2013-07-01 false Definitions. 89.502 Section 89.502 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Selective Enforcement Auditing §...

  15. 40 CFR 89.502 - Definitions.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 20 2011-07-01 2011-07-01 false Definitions. 89.502 Section 89.502 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Selective Enforcement Auditing §...

  16. 40 CFR 89.502 - Definitions.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 21 2012-07-01 2012-07-01 false Definitions. 89.502 Section 89.502 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Selective Enforcement Auditing §...

  17. 40 CFR 89.502 - Definitions.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 20 2014-07-01 2013-07-01 true Definitions. 89.502 Section 89.502 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Selective Enforcement Auditing §...

  18. 40 CFR 89.501 - Applicability.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 21 2013-07-01 2013-07-01 false Applicability. 89.501 Section 89.501 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Selective Enforcement Auditing §...

  19. 40 CFR 89.501 - Applicability.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 21 2012-07-01 2012-07-01 false Applicability. 89.501 Section 89.501 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) AIR PROGRAMS (CONTINUED) CONTROL OF EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Selective Enforcement Auditing §...

  20. 40 CFR 141.89 - Analytical methods.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ....89 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) WATER PROGRAMS (CONTINUED) NATIONAL PRIMARY DRINKING WATER REGULATIONS Control of Lead and Copper § 141.89 Analytical methods. (a... 136 of this title. This need only be accomplished if the laboratory will be processing source...

  1. 40 CFR 745.89 - Firm certification.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 30 2010-07-01 2010-07-01 false Firm certification. 745.89 Section 745.89 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) TOXIC SUBSTANCES CONTROL ACT LEAD-BASED PAINT POISONING PREVENTION IN CERTAIN RESIDENTIAL STRUCTURES Residential Property...

  2. 40 CFR 745.89 - Firm certification.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 31 2011-07-01 2011-07-01 false Firm certification. 745.89 Section 745.89 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) TOXIC SUBSTANCES CONTROL ACT LEAD-BASED PAINT POISONING PREVENTION IN CERTAIN RESIDENTIAL STRUCTURES Residential Property...

  3. 40 CFR 745.89 - Firm certification.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 31 2014-07-01 2014-07-01 false Firm certification. 745.89 Section 745.89 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) TOXIC SUBSTANCES CONTROL ACT LEAD-BASED PAINT POISONING PREVENTION IN CERTAIN RESIDENTIAL STRUCTURES Residential Property...

  4. 40 CFR 745.89 - Firm certification.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 32 2013-07-01 2013-07-01 false Firm certification. 745.89 Section 745.89 Protection of Environment ENVIRONMENTAL PROTECTION AGENCY (CONTINUED) TOXIC SUBSTANCES CONTROL ACT LEAD-BASED PAINT POISONING PREVENTION IN CERTAIN RESIDENTIAL STRUCTURES Residential Property...

  5. 40 CFR 89.409 - Data logging.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 40 Protection of Environment 21 2012-07-01 2012-07-01 false Data logging. 89.409 Section 89.409... Data logging. (a) A computer or any other automatic data processing device(s) may be used as long as the system meets the requirements of this subpart. (b) Determine from the data collection records...

  6. 40 CFR 89.409 - Data logging.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 20 2011-07-01 2011-07-01 false Data logging. 89.409 Section 89.409... Data logging. (a) A computer or any other automatic data processing device(s) may be used as long as the system meets the requirements of this subpart. (b) Determine from the data collection records...

  7. 40 CFR 89.409 - Data logging.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Data logging. 89.409 Section 89.409... Data logging. (a) A computer or any other automatic data processing device(s) may be used as long as the system meets the requirements of this subpart. (b) Determine from the data collection records...

  8. 40 CFR 89.409 - Data logging.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 21 2013-07-01 2013-07-01 false Data logging. 89.409 Section 89.409... Data logging. (a) A computer or any other automatic data processing device(s) may be used as long as the system meets the requirements of this subpart. (b) Determine from the data collection records...

  9. 40 CFR 89.409 - Data logging.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 20 2014-07-01 2013-07-01 true Data logging. 89.409 Section 89.409... Data logging. (a) A computer or any other automatic data processing device(s) may be used as long as the system meets the requirements of this subpart. (b) Determine from the data collection records...

  10. 33 CFR 401.89 - Transit refused.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 33 Navigation and Navigable Waters 3 2012-07-01 2012-07-01 false Transit refused. 401.89 Section... TRANSPORTATION SEAWAY REGULATIONS AND RULES Regulations General § 401.89 Transit refused. (a) An officer may refuse to allow a vessel to transit when, (1) The vessel is not equipped in accordance with §§ 401.5...

  11. 33 CFR 401.89 - Transit refused.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 33 Navigation and Navigable Waters 3 2010-07-01 2010-07-01 false Transit refused. 401.89 Section... TRANSPORTATION SEAWAY REGULATIONS AND RULES Regulations General § 401.89 Transit refused. (a) An officer may refuse to allow a vessel to transit when, (1) The vessel is not equipped in accordance with §§ 401.5...

  12. 33 CFR 401.89 - Transit refused.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 33 Navigation and Navigable Waters 3 2013-07-01 2013-07-01 false Transit refused. 401.89 Section... TRANSPORTATION SEAWAY REGULATIONS AND RULES Regulations General § 401.89 Transit refused. (a) An officer may refuse to allow a vessel to transit when, (1) The vessel is not equipped in accordance with §§ 401.5...

  13. 20 CFR 632.89 - Performance standards.

    Code of Federal Regulations, 2010 CFR

    2010-04-01

    ... EMPLOYMENT AND TRAINING PROGRAMS Program Design and Management § 632.89 Performance standards. The Department of Labor shall establish performance standards for all Native American grantees (section 401(h)(1... 20 Employees' Benefits 3 2010-04-01 2010-04-01 false Performance standards. 632.89 Section...

  14. 44 CFR 5.89 - Waiver.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 44 Emergency Management and Assistance 1 2010-10-01 2010-10-01 false Waiver. 5.89 Section 5.89 Emergency Management and Assistance FEDERAL EMERGENCY MANAGEMENT AGENCY, DEPARTMENT OF HOMELAND SECURITY GENERAL PRODUCTION OR DISCLOSURE OF INFORMATION Subpoenas or Other Legal Demands for Testimony or...

  15. 40 CFR 89.503 - Test orders.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 21 2013-07-01 2013-07-01 false Test orders. 89.503 Section 89.503... Test orders. (a) A test order addressed to the manufacturer is required for any testing under this subpart. (b) The test order is signed by the Assistant Administrator for Air and Radiation or his or...

  16. 40 CFR 89.508 - Test procedures.

    Code of Federal Regulations, 2013 CFR

    2013-07-01

    ... 40 Protection of Environment 21 2013-07-01 2013-07-01 false Test procedures. 89.508 Section 89.508... Test procedures. (a)(1) For nonroad engines subject to the provisions of this subpart, the prescribed test procedures are the nonroad engine 8-mode test procedure as described in subpart E of this...

  17. 40 CFR 141.89 - Analytical methods.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 22 2010-07-01 2010-07-01 false Analytical methods. 141.89 Section 141...) NATIONAL PRIMARY DRINKING WATER REGULATIONS Control of Lead and Copper § 141.89 Analytical methods. (a... shall be conducted with the methods in § 141.23(k)(1). (1) Analyses for alkalinity,...

  18. 47 CFR 80.89 - Unauthorized transmissions.

    Code of Federal Regulations, 2014 CFR

    2014-10-01

    ... 47 Telecommunication 5 2014-10-01 2014-10-01 false Unauthorized transmissions. 80.89 Section 80.89... transmissions. Stations must not: (a) Engage in superfluous radio-communication. (b) Use telephony on 243 MHz... transmission of distress, alarm, urgency, or safety signals or messages, or to test transmissions. (e)...

  19. 47 CFR 80.89 - Unauthorized transmissions.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... 47 Telecommunication 5 2010-10-01 2010-10-01 false Unauthorized transmissions. 80.89 Section 80.89... transmissions. Stations must not: (a) Engage in superfluous radio-communication. (b) Use telephony on 243 MHz... transmission of distress, alarm, urgency, or safety signals or messages, or to test transmissions. (e)...

  20. 47 CFR 80.89 - Unauthorized transmissions.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... 47 Telecommunication 5 2011-10-01 2011-10-01 false Unauthorized transmissions. 80.89 Section 80.89... transmissions. Stations must not: (a) Engage in superfluous radio-communication. (b) Use telephony on 243 MHz... transmission of distress, alarm, urgency, or safety signals or messages, or to test transmissions. (e)...

  1. 47 CFR 80.89 - Unauthorized transmissions.

    Code of Federal Regulations, 2012 CFR

    2012-10-01

    ... 47 Telecommunication 5 2012-10-01 2012-10-01 false Unauthorized transmissions. 80.89 Section 80.89... transmissions. Stations must not: (a) Engage in superfluous radio-communication. (b) Use telephony on 243 MHz... transmission of distress, alarm, urgency, or safety signals or messages, or to test transmissions. (e)...

  2. 47 CFR 80.89 - Unauthorized transmissions.

    Code of Federal Regulations, 2013 CFR

    2013-10-01

    ... 47 Telecommunication 5 2013-10-01 2013-10-01 false Unauthorized transmissions. 80.89 Section 80.89... transmissions. Stations must not: (a) Engage in superfluous radio-communication. (b) Use telephony on 243 MHz... transmission of distress, alarm, urgency, or safety signals or messages, or to test transmissions. (e)...

  3. 36 CFR 251.89 - Time extensions.

    Code of Federal Regulations, 2012 CFR

    2012-07-01

    ... 36 Parks, Forests, and Public Property 2 2012-07-01 2012-07-01 false Time extensions. 251.89... Appeal of Decisions Relating to Occupancy and Use of National Forest System Lands § 251.89 Time extensions. (a) Filing of notice of appeal. Time for filing a notice of appeal is not extendable. (b)...

  4. 40 CFR 89.902 - Definitions.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... piece of equipment employed from year to year in the ordinary course of business for product development... EMISSIONS FROM NEW AND IN-USE NONROAD COMPRESSION-IGNITION ENGINES Exemption Provisions § 89.902 Definitions... an exemption granted under § 89.1004(b) for the purpose of exporting new nonroad engines....

  5. 31 CFR 306.89 - Public officers.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 31 Money and Finance: Treasury 2 2010-07-01 2010-07-01 false Public officers. 306.89 Section 306..., DEPARTMENT OF THE TREASURY BUREAU OF THE PUBLIC DEBT GENERAL REGULATIONS GOVERNING U.S. SECURITIES Assignments in Behalf of Private or Public Organizations § 306.89 Public officers. Securities registered...

  6. 40 CFR 89.503 - Test orders.

    Code of Federal Regulations, 2014 CFR

    2014-07-01

    ... 40 Protection of Environment 20 2014-07-01 2013-07-01 true Test orders. 89.503 Section 89.503... Test orders. (a) A test order addressed to the manufacturer is required for any testing under this subpart. (b) The test order is signed by the Assistant Administrator for Air and Radiation or his or...

  7. 40 CFR 89.327 - Charge cooling.

    Code of Federal Regulations, 2010 CFR

    2010-07-01

    ... 40 Protection of Environment 20 2010-07-01 2010-07-01 false Charge cooling. 89.327 Section 89.327....327 Charge cooling. For engines with an air-to-air intercooler (or any other low temperature charge... and the temperature of the charge air shall be monitored and recorded....

  8. 40 CFR 89.327 - Charge cooling.

    Code of Federal Regulations, 2011 CFR

    2011-07-01

    ... 40 Protection of Environment 20 2011-07-01 2011-07-01 false Charge cooling. 89.327 Section 89.327....327 Charge cooling. For engines with an air-to-air intercooler (or any other low temperature charge... and the temperature of the charge air shall be monitored and recorded....

  9. 49 CFR 89.39 - Administrative charges.

    Code of Federal Regulations, 2011 CFR

    2011-10-01

    ... Referral of Debts to IRS for Tax Refund Offset § 89.39 Administrative charges. In accordance with 4 CFR 102.13, all administrative charges incurred in connection with the referral of the debt to the IRS shall... 49 Transportation 1 2011-10-01 2011-10-01 false Administrative charges. 89.39 Section...

  10. 49 CFR 89.39 - Administrative charges.

    Code of Federal Regulations, 2010 CFR

    2010-10-01

    ... Referral of Debts to IRS for Tax Refund Offset § 89.39 Administrative charges. In accordance with 4 CFR 102.13, all administrative charges incurred in connection with the referral of the debt to the IRS shall... 49 Transportation 1 2010-10-01 2010-10-01 false Administrative charges. 89.39 Section...