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Joseyphus, R.J.; Matsumoto, T.; Takahashi, H.; Kodama, D.; Tohji, K.; Jeyadevan, B., E-mail: jeya@mail.kankyo.tohoku.ac.jp2007
AbstractAbstract
[en] The role of polyol, precursor and reaction promoting agents in the synthesis of metal and alloy nanoparticles using polyol process has been investigated by analyzing the reaction steps involved in the synthesis of cobalt in Co ion-polyol-[OH-] ion system in detail. The reducing potential of polyols and the easiness with which any metal salt can react to form reducible complexes has been evaluated using the orbital molecular theory and the results were experimentally verified. The reduction limit of polyol and their extension using reaction promoting agents such as [OH-] ions is also explained. The reduction of cobalt is preceded by various reaction stages of complex/compound formation, which has been fully identified. Furthermore, the reducing form of cobalt has been identified as either cobalt alkoxide or cobalt hydroxide. The results confirmed that the complex forming reactions that take place prior to the formation of the precursor, which finally get reduced to metal, play a decisive role in determining the physical properties of the nanoparticles. The approach can be extended to reduce any metals or alloys using polyol process. - Graphical abstract: The role of polyol, precursor and reaction promoting agents in the synthesis of metal and alloy nanoparticles using polyol process has been investigated by analyzing the reaction steps involved in the synthesis of cobalt in Co ion-polyol-[OH-] system. Figure explains the entire reaction scheme in the formation of Co metal in ethylene glycol
Primary Subject
Source
S0022-4596(07)00299-X; Available from http://dx.doi.org/10.1016/j.jssc.2007.07.024; Copyright (c) 2007 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Makaryunas, K.V.; Makaryunene, Eh.K.; Dragunas, A.K.
Summaries of reports of 23. Conference on nuclear spectroscopy and nuclear structure1983
Summaries of reports of 23. Conference on nuclear spectroscopy and nuclear structure1983
AbstractAbstract
No abstract available
Original Title
Izmeneniya veroyatnosti ehlektronnogo zakhvata yadrami 57Co v khimicheskikh soedineniyakh
Primary Subject
Source
Gosudarstvennyj Komitet po Ispol'zovaniyu Atomnoj Ehnergii SSSR, Moscow; Ministerstvo Vysshego i Srednego Spetsial'nogo Obrazovaniya SSSR, Moscow; Moskovskij Gosudarstvennyj Univ. (USSR); p. 261; 1983; p. 261; 23. Conference on nuclear spectroscopy and nuclear structure; Moscow (USSR); 19-21 Apr 1983; Short note.
Record Type
Miscellaneous
Literature Type
Conference
Report Number
Country of publication
BETA DECAY, BETA DECAY RADIOISOTOPES, CHALCOGENIDES, CHLORIDES, CHLORINE COMPOUNDS, COBALT COMPOUNDS, COBALT ISOTOPES, DAYS LIVING RADIOISOTOPES, DECAY, ELECTRON CAPTURE RADIOISOTOPES, ELEMENTS, HALIDES, HALOGEN COMPOUNDS, INTERMEDIATE MASS NUCLEI, ISOTOPES, NUCLEAR DECAY, NUCLEI, ODD-EVEN NUCLEI, OXYGEN COMPOUNDS, RADIOISOTOPES, SULFATES, SULFIDES, SULFUR COMPOUNDS, TRANSITION ELEMENT COMPOUNDS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The angular distributions of cross sections and analyzing powers have been measured for the 58Fe(p, γ0)59Co reactions throughout the giant dipole resonance regions of 55,57,59Co. In addition, the 90degree yield curve has been measured for the 58Fe(p, γ0)59Co reaction for E/subp/ from 5.0 to 16.0 MeV in 100 keV steps. The data are analyzed to deduce the amplitudes and phases of the T matrix elements involved. The preferred solution indicates that the major change occurring in crossing the giant dipole resonance occurs in the relative phase between the d5/2 and g9/2 amplitudes. The implications of these results are discussed vis a vis the isospin splitting of the giant dipole resonance
Original Title
Angular distributions, analyzing powers
Primary Subject
Record Type
Journal Article
Journal
Phys. Rev., C; v. 14(2); p. 553-562
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Chemical shift, differences of full width at half maximum (ΔFWHM) and full width at half maximum (FWHM) of Kα and Kβ1,3 x-ray emission lines were measured for the following Co compounds: Co, CoO, Co2O3, CoSO4.7H2O, Co(NO3)2.6H2O, CoCr2O4, Co(ClO4)2.6H2O, Co(C2H3O2), CoCl2.6H2O, CoCl2, CoF2, CoF2.4H2O and CoF3. The measurements were performed with wavelength-dispersive x-ray fluorescence spectrometry (WDXRF). It was found that the calculated results for Co compounds are strongly correlated with the oxidation state. At the same time, chemical shift for F compounds is generally more than that for Cl compounds. Larger chemical shifts and FWHM were also found for Kβ1,3 lines than Kα ones. It should be noted that the magnitude of chemical shifts increases with the increasing number of ligand atoms.
Primary Subject
Source
Available from http://dx.doi.org/10.1088/0031-8949/81/01/015302; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Physica Scripta (Online); ISSN 1402-4896;
; v. 81(1); [6 p.]

Country of publication
CHALCOGENIDES, CHLORIDES, CHLORINE COMPOUNDS, CHROMIUM COMPOUNDS, COBALT COMPOUNDS, EMISSION SPECTROSCOPY, FLUORIDES, FLUORINE COMPOUNDS, HALIDES, HALOGEN COMPOUNDS, NITRATES, NITROGEN COMPOUNDS, OXIDES, OXYGEN COMPOUNDS, SPECTRA, SPECTROSCOPY, SULFATES, SULFUR COMPOUNDS, TRANSITION ELEMENT COMPOUNDS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Coordinations of poly(vinylene-arsine)s (1) towards transition metal ions were carried out to estimate the coordination ability of phenyl-substituted poly(vinylene-arsine) (1a) and methyl-substituted poly(vinylene-arsine) (1b). No 1a-Co complex was obtained upon addition of an acetone solution of 1a to an acetone solution of cobalt (II) chloride hexahydrate. On the other hand, 1b-Co complexes were obtained in the reactions at different cobalt salt-1b feed ratios. As in the usual case, the bivalent complexes of the reaction run corresponding to the feed ratio of 1:1 [CoCl2]/[repeating unit of 1b] oxidized readily in air to give very stable complexes of trivalent cobalt. On the other hand, the bivalent complexes of the reaction runs corresponding to the feed ratios of 1:4 and 1:10 both exhibited unusual stability against air oxidation owing to the higher concentration of 1b in the reaction mixture. Reactions of 1 and bis(2,2'-bipyridyl)ruthenium(II) dichloride also provided polymer complexes. In all the cases, 1b had higher coordination property than 1a due to its lower steric hindrance.
Primary Subject
Source
IUMRS-ICA 2008 symposium, sessions X and Y; Nagoya (Japan); 9-13 Dec 2008; Available from http://dx.doi.org/10.1088/1742-6596/184/1/012021; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Literature Type
Conference
Journal
Journal of Physics. Conference Series (Online); ISSN 1742-6596;
; v. 184(1); [6 p.]

Country of publication
CHARGED PARTICLES, CHEMICAL REACTIONS, CHLORIDES, CHLORINE COMPOUNDS, COBALT COMPOUNDS, COMPLEXES, ELEMENTS, HALIDES, HALOGEN COMPOUNDS, IONS, KETONES, METALS, ORGANIC COMPOUNDS, PLATINUM METALS, POLYMERS, REFRACTORY METALS, TRANSITION ELEMENT COMPLEXES, TRANSITION ELEMENT COMPOUNDS, TRANSITION ELEMENTS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Mukhopadhyay, Krishnendu; Mandal, Anjana; Mukhopadhyay, Banani; Nayak, Dalia; Lahiri, Susanta
Proceedings of nuclear and radiochemistry symposium1997
Proceedings of nuclear and radiochemistry symposium1997
AbstractAbstract
[en] Effect of the presence of n-octanol in the extraction of traces of cobalt in HCl-TOA system was studied. In the extraction, both synergistic and antagonistic effects, depending on the volume of alcohol present, were observed. Extraction behaviour of the element was studied radiometrically using 57,58Co, produced by α- particle bombardment of cobalt, as radiotracer for the element. (author). 1 fig
Source
Ramakumar, K.L. (ed.) (Bhabha Atomic Research Centre, Mumbai (India). Fuel Chemistry Div.); Pujari, P.K.; Swarup, R.; Sood, D.D. (Bhabha Atomic Research Centre, Bombay (India). Radiochemistry Div.) (eds.); Department of Atomic Energy, Bombay (India). Board of Research in Nuclear Sciences; 442 p; 1997; p. 327-328; Bhabha Atomic Research Centre; Mumbai (India); NUCAR 97: nuclear and radiochemistry symposium; Calcutta (India); 21-24 Jan 1997
Record Type
Book
Literature Type
Conference
Country of publication
ALCOHOLS, AMINES, BETA DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, CHELATING AGENTS, CHLORINE COMPOUNDS, COBALT ISOTOPES, COMPLEXES, DAYS LIVING RADIOISOTOPES, ELECTRON CAPTURE RADIOISOTOPES, ELEMENTS, EXTRACTION, HALOGEN COMPOUNDS, HOURS LIVING RADIOISOTOPES, HYDROGEN COMPOUNDS, HYDROXY COMPOUNDS, INORGANIC ACIDS, INORGANIC COMPOUNDS, INTERMEDIATE MASS NUCLEI, INTERNAL CONVERSION RADIOISOTOPES, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, METALS, NUCLEI, ODD-EVEN NUCLEI, ODD-ODD NUCLEI, ORGANIC COMPOUNDS, RADIOISOTOPES, SEPARATION PROCESSES, TRANSITION ELEMENT COMPLEXES, TRANSITION ELEMENTS
Reference NumberReference Number
Related RecordRelated Record
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AbstractAbstract
No abstract available
Primary Subject
Secondary Subject
Source
International Atomic Energy Agency, Vienna (Austria); Proceedings series; p. 369-383; 1973; IAEA; Vienna; Symposium on the interaction of radioactive contaminants with the constituents of the marine environment; Seattle, Wash., U.S.A; 10 Jul 1972; IAEA-SM--158/23
Record Type
Book
Literature Type
Conference
Country of publication
ANIMALS, ARTHROPODS, BETA DECAY RADIOISOTOPES, BETA-MINUS DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, CHARGED PARTICLES, COBALT ISOTOPES, COMPLEXES, DAYS LIVING RADIOISOTOPES, ECOSYSTEMS, ELECTRON CAPTURE RADIOISOTOPES, ELEMENTS, HOURS LIVING RADIOISOTOPES, INTERMEDIATE MASS NUCLEI, INVERTEBRATES, IONS, ISOMERIC TRANSITION ISOTOPES, ISOTOPES, METALS, MINUTES LIVING RADIOISOTOPES, NUCLEI, ODD-EVEN NUCLEI, ODD-ODD NUCLEI, RADIOISOTOPES, TRANSITION ELEMENT COMPLEXES, TRANSITION ELEMENTS, WATER, YEARS LIVING RADIOISOTOPES
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The obstruction effect in the electrolyte diffusion of cobalt halides and in tracer diffusion of Co2+ ions in the presence of different supporting electrolytes at various concentrations was studied at 25 deg C using the zone diffusion technique. It was observed that obstruction effect expressed in terms of α increased with concentration and was higher for electrolyte diffusion than in tracer diffusion, however, for a given concentration it was found to descrease with increasing charge density of an anion. These observations are explained on the basis of competitive hydration between ions and agar molecules. (author) 8 refs.; 3 figs
Primary Subject
Record Type
Journal Article
Journal
Journal of Radioanalytical and Nuclear Chemistry; ISSN 0236-5731;
; CODEN JRNCD; v. 127(6); p. 401-408

Country of publication
ATOMIC IONS, BETA DECAY RADIOISOTOPES, BETA-PLUS DECAY RADIOISOTOPES, BROMIDES, BROMINE COMPOUNDS, CARBOHYDRATES, CHARGED PARTICLES, CHLORIDES, CHLORINE COMPOUNDS, COBALT COMPOUNDS, COBALT ISOTOPES, COLLOIDS, DAYS LIVING RADIOISOTOPES, DISPERSIONS, ELECTRON CAPTURE RADIOISOTOPES, HALIDES, HALOGEN COMPOUNDS, HOURS LIVING RADIOISOTOPES, INTERMEDIATE MASS NUCLEI, IODIDES, IODINE COMPOUNDS, IONS, ISOMERIC TRANSITION ISOTOPES, ISOTOPE APPLICATIONS, ISOTOPES, NUCLEI, ODD-ODD NUCLEI, ORGANIC COMPOUNDS, POLYSACCHARIDES, RADIOISOTOPES, SACCHARIDES, SOLVATION, TRANSITION ELEMENT COMPOUNDS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Xu, Kebin; Kitazumi, Yuki; Kano, Kenji; Shirai, Osamu, E-mail: shiraio@kais.kyoto-u.ac.jp2018
AbstractAbstract
[en] Phosphorous is one of three major nutritional elements for plants and usually exists as phosphate ions in nature. For hydroponic culturing and wastewater treatment, the development of a high-performance phosphate sensor would be very helpful. A novel phosphate ion-selective electrode was constructed using a cobalt phosphate surface coated cobalt electrode. The potential response seems to be caused by the formation of Co(H2PO4)2 in the coexistence of CoO and Co(OH)2. The sensor exhibited a linear response to H2PO4− in the concentration range from 1.0 × 10−5 to 1.0 × 10−1 mol L−1 at a pH range from 4.0 to 6.5 with a slope of −39 mV dec−1. The sensor was unaffected by common anions, such as chloride, carbonate, and sulfate. The electrode maintained stability for at least 4 weeks in a live hydroponics system when sufficient Co3(PO4)2·8H2O was deposited on the Co electrode.
Primary Subject
Source
S0013468618313082; Available from http://dx.doi.org/10.1016/j.electacta.2018.06.021; Copyright (c) 2018 Elsevier Ltd. All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Journal
Country of publication
CHALCOGENIDES, CHEMISTRY, CHLORINE COMPOUNDS, COBALT COMPOUNDS, DEPOSITION, ELECTRODES, ELECTROLYSIS, ELEMENTS, HALIDES, HALOGEN COMPOUNDS, HYDROGEN COMPOUNDS, HYDROXIDES, LYSIS, METALS, OXIDES, OXYGEN COMPOUNDS, PHOSPHATES, PHOSPHORUS COMPOUNDS, SURFACE COATING, TRANSITION ELEMENT COMPOUNDS, TRANSITION ELEMENTS
Reference NumberReference Number
INIS VolumeINIS Volume
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Witiak, D.
Ames Lab., Iowa (USA)1972
Ames Lab., Iowa (USA)1972
AbstractAbstract
No abstract available
Source
Dec 1972; 93 p; Thesis.
Record Type
Report
Report Number
Country of publication
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