Filters
Results 1 - 10 of 4105
Results 1 - 10 of 4105.
Search took: 0.025 seconds
Sort by: date | relevance |
AbstractAbstract
No abstract available
Original Title
Vliyanie khlornoj kisloty na teploemkost' vodnykh rastvorov perkhloratov metallov vtoroj gruppy periodicheskoj sistemy
Primary Subject
Source
Published in summary form only; for English translation see the journal J. Appl. Chem. USSR.
Record Type
Journal Article
Journal
Zhurnal Prikladnoj Khimii; v. 50(2); p. 466-467
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
Hakin, Andrew W.; Lukacs, Michael J.; Liu, Jin Lian; Erickson, Kristy; Madhavji, Asha, E-mail: hakin@uleth.ca2003
AbstractAbstract
[en] Relative densities and relative massic heat capacities have been measured for aqueous solutions of Y(ClO4)3, Yb(ClO4)3, Dy(ClO4)3, and Sm(ClO4)3 at T=(288.15,298.15,313.15, and 328.15) K and p=0.1 MPa. These measurements were made in the concentration range 0.01624≤m/(mol·kg-1)≤0.41822 using a Sodev 02D Vibrating Tube Densimeter and a Picker Microflow Calorimeter, respectively. To counter the potential effects of hydrolysis, aqueous solutions of the investigated salts were acidified with perchloric acid. After correcting for the presence of the acid, the measured properties were used to calculate apparent molar volumes and apparent molar heat capacities for solutions of the perchlorate salts in water. The calculated apparent molar properties were modeled at each investigated temperature using Pitzer ion interaction equations to produce estimates of apparent molar volumes and heat capacities at infinite dilution. In addition, the temperature dependences of the apparent molar properties of each salt were found to be well modeled by temperature dependent Pitzer ion interaction equations. The Helgeson, Kirham, and Flowers equations of state were incorporated into the Pitzer ion interaction equations in order to model the infinite dilution properties of the salts. Single ion volumes and heat capacities of the investigated trivalent metal cations have been calculated and compared to previously reported values
Primary Subject
Source
S0021961403000132; Copyright (c) 2003 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
Cardoso, M.C.C.; Carvalho, C.C.; Zukerman-Schpector, J.
Proceedings of the 42. Brazilian congress on chemistry. Chemistry, energy and development. Book of abstracts2002
Proceedings of the 42. Brazilian congress on chemistry. Chemistry, energy and development. Book of abstracts2002
AbstractAbstract
No abstract available
Original Title
Compostos de coordenacao entre percloratos de lantanideos (III) e a 2-pirrolidinona
Primary Subject
Source
Associacao Brasileira de Quimica, Rio de Janeiro, RJ (Brazil); 677 p; 2002; p. 371; 42. Brazilian congress on chemistry; 42. Congresso brasileiro de quimica; Rio de Janeiro, RJ (Brazil); 9-13 Sep 2002; Available from the Library of the Brazilian Nuclear Energy Commission, Rio de Janeiro
Record Type
Miscellaneous
Literature Type
Conference
Country of publication
AMIDES, AZOLES, CHLORINE COMPOUNDS, COHERENT SCATTERING, DIFFRACTION, ELEMENTS, EMISSION SPECTROSCOPY, EUROPIUM COMPOUNDS, GADOLINIUM COMPOUNDS, HALOGEN COMPOUNDS, HETEROCYCLIC COMPOUNDS, LACTAMS, LANTHANUM COMPOUNDS, METALS, NEODYMIUM COMPOUNDS, ORGANIC COMPOUNDS, ORGANIC NITROGEN COMPOUNDS, OXYGEN COMPOUNDS, PERCHLORATES, PRASEODYMIUM COMPOUNDS, PYRROLES, RARE EARTH COMPOUNDS, RARE EARTHS, SCATTERING, SPECTRA, SPECTROSCOPY
LanguageLanguage
Reference NumberReference Number
Related RecordRelated Record
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The changes of activity coefficients of cadmium ions in perchlorate solutions of lithium, sodium, magnesium, calcium, barium and cadmium and silver ions inperchlorate solutions of lithium and calcium are studied at 25 deg C using potentiometric method. It is established that in the given solutions the changes of activity coefficients of cadmium and silver ions are connected only with their hydration. The numbers of hydration for the ions are calculated
Original Title
Vliyanie perkhloratnykh rastvorov na koehffitsienty aktivnosti ionov kadmiya i serebra
Primary Subject
Source
For English translation see the journal Russian Journal of Physical Chemistry (UK).
Record Type
Journal Article
Journal
Zhurnal Fizicheskoj Khimii; ISSN 0044-4537;
; v. 54(6); p. 1396-1399

Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Influence of solvent (methanol, acetonitrile, dioxane, DMFA) on complex formation of Np(5) with U(6), Th(4) and Fe(3) is studied. It is established that stability of Np(5) complexes with U(6) and Th(4) increases with donor number decrease. The highest stability is observed in complexes with Fe(3) which has low donor and acceptor numbers. It is noted that solvent molecules located in the NpO2 equatorial plane influence to some extent electron plane shift from neptunium to oxygen atoms, i.e. anion charge
Original Title
Vliyanie rastvoritelya na obrazovanie kompleksov neptuniya (5) s uranom (6), toriem (4), zhelezom (3)
Record Type
Journal Article
Journal
Country of publication
ACTINIDE COMPOUNDS, CHLORINE COMPOUNDS, DIELECTRIC PROPERTIES, DISPERSIONS, ELECTRICAL PROPERTIES, HALOGEN COMPOUNDS, HOMOGENEOUS MIXTURES, IRON COMPOUNDS, MIXTURES, NEPTUNIUM COMPOUNDS, NONAQUEOUS SOLVENTS, OXYGEN COMPOUNDS, PERCHLORATES, PHYSICAL PROPERTIES, SOLUTIONS, SOLVENTS, SPECTRA, THORIUM COMPOUNDS, TRANSITION ELEMENT COMPOUNDS, TRANSURANIUM COMPOUNDS, URANIUM COMPOUNDS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The polarographic behaviour of tetravalent uranium, neptunium and plutonium solvates (U(ClO4)4x9DMSO, Np(ClO4)4x8DMSO and Pu(ClO4)4x8DMSO) in dimethylsulfoxide on mercury drop electrode (m.d.e.) and rotating platinum electrode (r.p.e.) has been studied. All the three compounds undergo two-stage reduction, first to the three-valent state and then to an amalgam (on m.d.e.). On the r.p.e. there is one wave corresponding to the process An4+ + e → An3+. All the uranium reduction waves are irreversible. On the m.d.e. neptunium shows a reversible wave of reduction of Np4+ to Np3+. On the r.p.e. the waves of Np4+ and Pu4+ are almost reversible. Chloride-ions did not affect the reduction tetravalent U, Np and Pu. The potential shift of ion pairs U4+/U3+, Np4+/Np3+ and Pu4+/Pu3+ in DMSO as against water is explained in terms of pronounced solvation of tertravalent actinoid ions
Original Title
Issledovanie polyarograficheskogo povedeniya chetyrekhvalentnogo urana, neptuniya i plutoniya v dimetilsul'fokside
Source
For English translation see the journal Soviet Radiochemistry (USA).
Record Type
Journal Article
Journal
Radiokhimiya; ISSN 0033-8311;
; v. 47(5); p. 650-654

Country of publication
ACTINIDE COMPOUNDS, CHEMICAL REACTIONS, CHLORINE COMPOUNDS, DISPERSIONS, HALOGEN COMPOUNDS, HOMOGENEOUS MIXTURES, KINETICS, MIXTURES, NEPTUNIUM COMPOUNDS, ORGANIC COMPOUNDS, ORGANIC SULFUR COMPOUNDS, OXYGEN COMPOUNDS, PERCHLORATES, PLUTONIUM COMPOUNDS, REACTION KINETICS, SULFOXIDES, TRANSURANIUM COMPOUNDS, URANIUM COMPOUNDS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] Kinetics of Np(5) oxidation with pentavalent vanadium in the HClO4-NaClO4 solution at the ion force μ=2-4 is studied. The reaction rate is expressed with the equation -d[Np(5)]dt=k1[Np(5)][V(5)][H+], where k1=118+-10M-2xmin-1 at μ=4 and 25.5 deg C. The energy and entropy of activation are 13.5 kcal/mol and - 14 entr. units respectively. The reaction mechanism includes a slow stage of electron transfer between NpO2+ and VO3+ ions
[ru]
Original Title
Vzaimodejstvie aktinoidov s ionami vanadiya
Source
For English translation see the journal Soviet Radiochemistry (USA).
Record Type
Journal Article
Journal
Radiokhimiya; ISSN 0033-8311;
; v. 23(1); p. 88-94

Country of publication
ACTINIDE COMPOUNDS, ALKALI METAL COMPOUNDS, CHEMICAL REACTIONS, CHLORINE COMPOUNDS, ENERGY, HALOGEN COMPOUNDS, HYDROGEN COMPOUNDS, INORGANIC ACIDS, KINETICS, NEPTUNIUM COMPOUNDS, OXYGEN COMPOUNDS, PERCHLORATES, PHYSICAL PROPERTIES, REACTION KINETICS, SODIUM COMPOUNDS, THERMODYNAMIC PROPERTIES, TRANSITION ELEMENT COMPOUNDS, TRANSURANIUM COMPOUNDS, VANADIUM COMPOUNDS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] In the present study, field amplified sample stacking (FASS) techniques in the nonaqueous capillary electrophoresis method (NACE) were introduced for the on-line concentration of the acrylamide to improve acrylamide detection at 210 nm by diode-array detection. Acetonitrile (ACN) as a nonaqueous solvent permits acrylamide to be protonated through the change of its acid-base chemistry, allowing capillary electrophoretic separation of this compound. Choosing 30 mmol L-1 HClO4, 20 mmol L-1 NaClO4, 218 mmol L-1 CH3COOH in ACN as the separation electrolyte and employing sample stacking methods, the LOD value of acrylamide was decreased to 2.6 ng mL-1 with electrokinetic injection and 4.4 ng mL-1 with hydrodynamic injection. Optimized stacking conditions were applied to the determination of acrylamide in several foodstuffs. The method is simple, rapid, inexpensive, and widely applicable for the determination of acrylamide in food samples
Primary Subject
Source
3. international symposium on recent advances in food analysis; Prague (Czech Republic); 7-9 Nov 2007; S0003-2670(08)00076-7; Available from http://dx.doi.org/10.1016/j.aca.2008.01.008; Copyright (c) 2008 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA)
Record Type
Journal Article
Literature Type
Conference
Journal
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
[en] The stability constants (K1) of the complex compounds of rare-earth perchlorates with benzimidazole have been determined by pH-metric titrations. Nonmonotonic variation of log K1 as the atomic number of the rare-earth element is increased has been discovered. 9 refs., 1 fig., 1 tab
Primary Subject
Secondary Subject
Source
Translated from Koordinatsionnaya Khimiya: 18; No. 8, 768-769(Aug 1992). Cover-to-cover-translation of Koordinatsionnaya Khimiya (USSR). Cover-to-cover-translation of Koordinatsionnaya Khimiya (USSR). Cover-to-cover-translation of Koordinatsionnaya Khimiya (USSR).
Record Type
Journal Article
Literature Type
Translation
Journal
Country of publication
AZOLES, CHLORINE COMPOUNDS, COMPLEXES, EUROPIUM COMPOUNDS, HALOGEN COMPOUNDS, HETEROCYCLIC COMPOUNDS, HYDROGEN COMPOUNDS, IMIDAZOLES, LANTHANUM COMPOUNDS, NEODYMIUM COMPOUNDS, ORGANIC COMPOUNDS, ORGANIC NITROGEN COMPOUNDS, ORGANIC OXYGEN COMPOUNDS, OXYGEN COMPOUNDS, PERCHLORATES, PRASEODYMIUM COMPOUNDS, RARE EARTH COMPLEXES, RARE EARTH COMPOUNDS, SAMARIUM COMPOUNDS
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
AbstractAbstract
No abstract available
Original Title
Skorost' zvuka i szhimaemost' vodnykh rastvorov perkhloratov nekotoryk' metallov vtoroj i tret'ej grupp periodicheskoj sistemy D.I. Mendeleeva
Primary Subject
Source
Published in summary form only; for English translation see the journal J. Appl. Chem. USSR.
Record Type
Journal Article
Journal
Zhurnal Prikladnoj Khimii; v. 50(2); p. 467
Country of publication
Reference NumberReference Number
INIS VolumeINIS Volume
INIS IssueINIS Issue
1 | 2 | 3 | Next |