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Sample records for licl-kcl ehlektrokhimicheskoe issledovanie

  1. On the formation of U Al alloys in the molten LiCl KCl eutectic

    Science.gov (United States)

    Cassayre, L.; Caravaca, C.; Jardin, R.; Malmbeck, R.; Masset, P.; Mendes, E.; Serp, J.; Soucek, P.; Glatz, J.-P.

    2008-08-01

    U-Al alloy formation has been studied in the temperature range of 400-550 °C by electrochemical techniques in the molten LiCl-KCl eutectic. Cyclic voltammetry showed that underpotential reduction of U(III) onto solid Al occurs at a potential about 0.35 V more anodic than pure U deposition. Open circuit potential measurements, recorded after small depositions of U metal onto the Al electrode, did not allow the distinction between potentials associated with UAl x alloys and the Al rest potential, as they were found to be practically identical. As a consequence, a spontaneous chemical reaction between dissolved UCl 3 and Al is thermodynamically possible and was experimentally observed. Galvanostatic electrolyses were carried out both on Al rods and Al plates. Stable and dense U-Al deposits were obtained with high faradic yields, and the possibility to load the whole bulk of a thin Al plate was demonstrated. The analyses (by SEM-EDX and XRD) of the deposits indicated the formation of different intermetallic phases (UAl 2, UAl 3 and UAl 4) depending on the experimental conditions.

  2. Issledovanie temperaturnoi i chastotnoi zavisimostei elektrofizicheskikh svoistv dioksida tseriya [Investigation of the temperature and frequency dependences of the electrical properties of cerium dioxide

    Directory of Open Access Journals (Sweden)

    V. A. Ogorodnik

    1993-05-01

    Full Text Available An experimental study of the electrical properties of CeO2 - temperature and frequency dependences of the conductivity, permittivity and dielectric loss tangent, as well as an interpretation of the results obtained

  3. Electrochemical Deposition of Uranium Metal in Molten Salt

    Institute of Scientific and Technical Information of China (English)

    2008-01-01

    <正>Based on the studies in the electrode process of uranium ions in the molten LiCl-KCl, we carried out the electrochemical deposition of uranium in two kinds of melts, LiCl-KCl-UCl3 and LiCl- KCl-UCl3-

  4. The applicability of activities in kinetic expressions: A more fundamental approach to represent the kinetics of the system CO2–OH-salt in terms of activities

    NARCIS (Netherlands)

    Haubrock, J.; Hogendoorn, J.A.; Versteeg, G.F.

    2007-01-01

    The applicability of utilizing activities instead of concentrations in kinetic expressions has been investigated using the reaction of CO2 in sodium hydroxide solutions also containing different neutral salts (LiCl, KCl and NaCl) as model system. For hydroxide systems it is known that when the react

  5. The applicability of activities in kinetic expressions : A more fundamental approach to represent the kinetics of the systemCO2–OH−–salt in terms of activities

    NARCIS (Netherlands)

    Haubrock, J.; Hogendoorn, J.A.; Versteeg, G.F.

    2007-01-01

    The applicability of utilizing activities instead of concentrations in kinetic expressions has been investigated using the reaction of CO2 in sodium hydroxide solutions also containing different neutral salts (LiCl, KCl and NaCl) as model system. For hydroxide systems it is known that when the react

  6. Cyclic Voltammetric Experiment - Simulation. Comparisons of the Complex Mechanism Associated with Electrochemical Reduction of Zr4+ in LiCl-KCl Eutectic Molten Salt

    OpenAIRE

    Fabian, Cesimiro P.; Luca, Vittorio; Le, Than H.; Bond, Alan M.; Chamelot, Pierre; Massot, Laurent; Caravaca, Concepción; Hanley, Tracey L.; Lumpkin, Gregory R.

    2012-01-01

    International audience; Nuclear energy increasingly represents an important option for generating largely clean CO2-free electricity and zirconium is a fission product that is expected to be present in irradiated fuels. The present investigation addresses the electrochemical reduction of Zr4+ to Zro in LiCl - KCl eutectic molten salt in the temperature range 425-550◦C using cyclic voltammetry (CV), square-wave voltammetry (SWV) and bulk electrolysis. Simulations of the CV data indicate that t...

  7. Modeling of aqueous electrolyte solutions with perturbed-chain statistical associated fluid theory

    DEFF Research Database (Denmark)

    Cameretti, Luca F.; Sadowski, Gabriele; Mollerup, Jørgen

    2005-01-01

    The vapor pressures and liquid densities of single-salt electrolyte solutions containing NaCl, LiCl, KCl, NaBr, LiBr, KBr, NaI, LiI, KI, Li2SO4, Na2SO4, and K2SO4 were modeled with an equation of state based on perturbed-chain statistical associated fluid theory (PC-SAFT). The PC-SAFT model...

  8. Vyryvajas' iz objatij politiki. Issledovanie kul'tur vospominanija kak sposob pooshhrenija istoricheskogo dialoga v litovsko-rossijskih otnoshenijah [An escape from the embrace of politics. A study into the cultures of remembrance as a means to encourage a historical dialogue in Lithuanian-Russian relations

    Directory of Open Access Journals (Sweden)

    Safronovas Vasilijus

    2012-01-01

    Full Text Available This article focuses on the factors inhibiting a productive rethinking of the past in contemporary Lithuanian-Russian relations. The rethinking of the past is understood as a process facilitating the reconsideration of historical meanings through adjusting them to the expectations and values of the contemporary society. The author argues that in this process historical research — as an important tool for encouraging the co-existence of communities —should fulfil certain social functions. Having chosen the Lithuanian-Russian communication space as a case, the author emphasizes the need to develop an interest in mutual knowledge of cultures of remembrance in this space. Outlining the strategies specific to the prevailing cultures of remembrance in contemporary Russia and Lithuania, the author addresses the issue of their proper relationship, as well as that of the appropriateness of historical policy. The criminalisation of certain evaluations of the past and the academic dialogue between historians are regarded as two opposite extremes of historical policy actually existing in the Lithuanian-Russian communication space. The author stresses that research into the values and interpretations of the past peculiar to certain social groups in both Lithuania and Russia may be considered as a basis for further development of the historical dialogue. It is assumed that such research may contribute to the improvement in the field of politics of history.

  9. Alcohol and the clinical picture of gout

    OpenAIRE

    M S Eliseev; Nasonov, E L; V G Barskova; M S Yeliseyev; V A Nasonova; Ye L Nasonov

    2007-01-01

    Tsel' issledovaniya. Izuchenie vliyaniya alkogolya na klinicheskie proyavleniya u bol'nykh podagricheskim artritom. Material i metody. V issledovanie vklyucheny 280 muzhchin, bol'nykh podagroy (kriterii S.L. Wallace). Dlya vyyavleniya skrytoy tyagi k alkogolyu ispol'zovalsya voprosnik CAGE, putem oprosa vyyavlyalos' kolichestvo prinimaemogo alkogolya v nedelyu. U vsekh bol'nykh otsenivali antropometricheskie pokazateli, syvorotochnye urovni pechenochnykh fermentov, bilirubina, kreatinina, moc...

  10. In-situ characterization of electrochromism based on ITO/PEDOT:PSS towards preparation of high performance device

    Science.gov (United States)

    Xue-Jin, Wang; Zheng-Fei, Guo; Jing-Yu, Qu; Kun, Pan; Zheng, Qi; Li, Hong

    2016-02-01

    Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) is usually sandwiched between indium tin oxide (ITO) and a functional polymer in order to improve the performance of the device. However, because of the strong acidic nature of PEDOT:PSS, the instability of ITO/PEDOT:PSS interface is also observed. The mechanism of degradation of the device remains is unclear and needs to be further studied. In this article, we investigate the in-situ electrochromism of PEDOT:PSS to disclose the cause of the degradation. X-ray photoelectron spectroscopy (XPS) was used to characterize the PEDOT:PSS films, as well as the PEDOT:PSS plus polyethylene glycol (PEG) films with and without indium ions. The electrochromic devices (ECD) based on PEDOT:PSS and PEG with and without indium ions are carried out by in-situ micro-Raman and laser reflective measurement (LRM). For comparison, ECD based on PEDOT:PSS and PEG films with LiCl, KCl, NaCl or InCl3 are also investigated by LRM. The results show that PEDOT:PSS is further reduced when negatively biased, and oxidized when positively biased. This could identify that PEDOT:PSS with indium ions from PEDOT:PSS etching ITO will lose dopants when negatively biased. The LRM shows that the device with indium ions has a stronger effect on the reduction property of PEDOT:PSS-PEG film than the device without indium ions. The contrast of the former device is 44%, that of the latter device is about 3%. The LRM also shows that the contrasts of the device based on PEDOT:PSS+PEG with LiCl, KCl, NaCl, InCl3 are 30%, 27%, 15%, and 18%, respectively. Project supported by the National High Technology Research and Development Program of China (Grant No. 2015AA034201) and the Chinese Universities Scientific Fund (Grant No. 2015LX002).

  11. A Rich Morphological Diversity of Biosaline Drying Patterns Is Generated by Different Bacterial Species, Different Salts and Concentrations: Astrobiological Implications

    Science.gov (United States)

    Gómez Gómez, José María; Medina, Jesús; Rull, Fernando

    2016-07-01

    Biosaline formations (BSFs) are complex self-organized biomineral patterns formed by "hibernating" bacteria as the biofilm that contains them dries out. They were initially described in drying biofilms of Escherichia coli cells + NaCl. Due to their intricate 3-D morphology and anhydrobiosis, these biomineralogical structures are of great interest in astrobiology. Here we report experimental data obtained with various alkali halide salts (NaF, NaCl, NaBr, LiCl, KCl, CsCl) on BSF formation with E. coli and Bacillus subtilis bacteria at two saline concentrations: 9 and 18 mg/mL. Our results indicate that, except for LiCl, which is inactive, all the salts assayed are active during BSF formation and capable of promoting the generation of distinctive drying patterns at each salt concentration. Remarkably, the BSFs produced by these two bacterial species produce characteristic architectural hallmarks as the BSF dries. The potential biogenicity of these biosaline drying patterns is studied, and the astrobiological implications of these findings are discussed.

  12. Pyrometallurgical separation processes of radionuclides contained in the irradiated nuclear fuel

    Energy Technology Data Exchange (ETDEWEB)

    De Cordoba, Guadalupe; Caravaca, Concha; Quinones, Javier; Gonzalez de la Huebra, Angel

    2005-01-01

    Faced with the new options for the high level waste management, the ''Partitioning and Transmutation (P and T)'' of the radio nuclides contained in the irradiated nuclear fuel appear as a promising option from different points of view, such as environmental risk, radiotoxic inventory reduction, economic, etc.. The present work is part of a research project called ''PYROREP'' of the 5th FWP of the EU that studied the feasibility of the actinide separation from the rest of fission products contained in the irradiated nuclear fuel by pyrometallurgical processes with the aim of their transmutation. In order to design these processes it is necessary to determine basic thermodynamic and kinetic data of the radionuclides contained in the nuclear fuel in molten salt media. The electrochemical study of uranium, samarium and molybdenum in the eutectic melt LiCl - KCl has been performed at a tungsten electrode in the temperature range of 450 - 600 deg C in order to obtain these basic properties. (Author)

  13. Effect of inorganic salts on crystallization of poly(ethylene glycol) in frozen solutions.

    Science.gov (United States)

    Izutsu, Ken-ichi; Aoyagi, Nobuo

    2005-01-06

    The effect of inorganic salts on eutectic crystallization of poly(ethylene glycol) (PEG) 1500-20,000 in frozen solution was studied to model the polymer and inorganic salt interaction in freeze-dried formulations. Thermal analysis of an aqueous PEG 3000 solution showed a eutectic PEG crystallization exotherm at approximately -47 degrees C and a subsequent PEG crystal melting endotherm at -14.9 degrees C. Addition of sodium chloride prevented the PEG crystallization in the freeze-concentrated solution surrounding ice crystals. Higher concentration NaCl was required to retain higher molecular weight PEG in the amorphous state. Various inorganic salts prevented the PEG crystallization to varying degrees depending mainly on the position of the anion in the Hofmeister's lyotropic series. Some salting-in and 'intermediate' salts (NaSCN, NaI, NaBr, NaCl, LiCl, KCl, and RbCl) inhibited the crystallization of PEG 7500 in frozen solutions. On the other hand, salting-out salts (NaH2PO4, Na2HPO4, Na2SO4, and NaF) did not show an apparent effect on the PEG crystallization. Some salting-out salts induced PEG crystallization in PEG and sucrose combination frozen solutions. The varying abilities of salts to prevent the PEG crystallization in frozen solutions strongly suggested that the solutes had different degrees of miscibility in the freeze-concentrates.

  14. Stepen ispitanosti šumadijsko-vojvođanskog dijalekta

    Directory of Open Access Journals (Sweden)

    Bošnjaković Žarko

    2009-01-01

    Full Text Available Avtory v nastojaščej rabote ukazyvajut na nedostatočnuju issledovannost' narodnyh govorov šumadijsko-voevodinskogo dialekta metodami tradicionnoj i urbanistskoj dialektologii. V rabote kartografičeski predstavleny oblasti, v kotoryh issledovanija zakončeny (oni prednaznačeny dlja nužd monografičeskih opisanij, Serbskogo dialektologičeskogo atlasa i Obščeslavjanskogo lingvističeskogo atlasa. Odnovremenno vydvinuty geografičeskie i administrativnye punkty s inventarem dereven', kotorye dolžny byt' podvergnuty issledovaniju. Karty pokazali, čto voevodinskoj poddialekt issledovan polnost'ju, pri naličii gustoj seti punktov. Ishodja iz togo, čto govory Bački i Srema issledovalis' let pjat'desjat tomu nazad, a material banatskih govorov zaregistrirovan primerno v to že samoe vremja, a opublikovan tol'ko v poslednie gody HH veka, sledovalo by ustanovit' napravlenija v razvitii dannyh govorov, a takže nastupivšie izmenenija. Odnako, ëtnografičeskie i jazykovye punkty na territorii šumadijsko-voevodinskogo dialekta ne issledovany v podhodjaščej stepeni. Do sih por issledovany govory časti Mačvy, Šumadijskoj Kolubary, Kraguevackoj Lepenicy i Gruži. Sporadičeskaja issledovannost' nalico v Kačere, Valevskoj Kolubare, Pocerine i v okrestnostjah Belgrada. Neissledovannymi ostalis' govory Jadara, Radževiny, Valevskoj Podgoriny, Posavotamnavy, Tamnavy Takovo, a takže čast' govorov meždu Dragačevom i Gružej.

  15. Salt anions promote the conversion of HypF-N into amyloid-like oligomers and modulate the structure of the oligomers and the monomeric precursor state.

    Science.gov (United States)

    Campioni, Silvia; Mannini, Benedetta; López-Alonso, Jorge P; Shalova, Irina N; Penco, Amanda; Mulvihill, Estefania; Laurents, Douglas V; Relini, Annalisa; Chiti, Fabrizio

    2012-12-07

    An understanding of the solution factors contributing to the rate of aggregation of a protein into amyloid oligomers, to the modulation of the conformational state populated prior to aggregation and to the structure/morphology of the resulting oligomers is one of the goals of present research in this field. We have studied the influence of six different salts on the conversion of the N-terminal domain of Escherichiacoli HypF (HypF-N) into amyloid-like oligomers under conditions of acidic pH. Our results show that salts having different anions (NaCl, NaClO(4), NaI, Na(2)SO(4)) accelerate oligomerization with an efficacy that follows the electroselectivity series of the anions (SO(4)(2-)≥ ClO(4)(-)>I(-)>Cl(-)). By contrast, salts with different cations (NaCl, LiCl, KCl) have similar effects. We also investigated the effect of salts on the structure of the final and initial states of HypF-N aggregation. The electroselectivity series does not apply to the effect of anions on the structure of the oligomers. By contrast, it applies to their effect on the content of secondary structure and on the exposure of hydrophobic clusters of the monomeric precursor state. The results therefore indicate that the binding of anions to the positively charged residues of HypF-N at low pH is the mechanism by which salts modulate the rate of oligomerization and the structure of the monomeric precursor state but not the structure of the resulting oligomers. Overall, the data contribute to rationalize the effect of salts on amyloid-like oligomer formation and to explain the role of charged biological macromolecules in protein aggregation processes.