Fate of nickel ion in (II-III) hydroxysulphate green rust synthesized by precipitation and coprecipitation

In order to investigate the efficiency of sulfate green rust (GR2) to remove Ni from solution, GR2 samples were synthesized under controlled laboratory conditions. Some GR2 samples were synthesized from Fe(II) and Fe(III) sulfate salts by precipitation. Other samples were prepared by coprecipitation, of Ni(II), Fe(II) and Fe(III) sulfate salts, i.e., in the presence of Ni. In another sample, Ni(II) sulfate salt was added to pre-formed GR2. After an initial X-ray diffraction (XRD) characterization all samples were exposed to ambient air in order to understand the role of Ni in the transformation of the GR2 samples. XRD was repeated after 45 days. The results showed that Nious GR2 prepared by coprecipitation is isomorphous to Ni-free GR2, i.e. Ni is incorporated into the crystalline structure. Fe(II) was not replaced by Ni(II) in the crystalline structure of GR2 formed prior to exposure to solution-phase Ni. This suggests Ni was adsorbed to the GR2 surface. Sulfate green rust is more efficient in removing Ni from the environment by coprecipitation.

Reliure de : Georgii Agricolae de Mensuris et ponderibus Romanorum atque Graecorum lib. V. De externis mensuris et ponderibus lib. II... De restituendis ponderibus atque mensuris lib. I. De precio metallorum et monetis lib. III

Numérisation partielle de reliure

Ex XIIII. T. Livii Decadibus. Prima, tertia, quarta, in qua praeter fragmenta III, & X libri, quae in Germania nuper reperta, hic etiam continentur, multa adulterina expunximus, multa vera recepimus, quae in aliis non habentur. Epitome singulorum librorum XIIII Decadum. Historia omnium XIIII Decadum in compendium redacta ab L. Floro. Polybii lib. V de rebus Romanis latinitate donati à Nicolao Perotto. Index copiosissimus rerum omnium memorabilium...

[Histoire romaine (latin). 1518-1533]

Ex XIIII. T. Livii Decadibus. Prima, tertia, quarta, in qua praeter fragmenta III, & X libri, quae in Germania nuper reperta, hic etiam continentur, multa adulterina expunximus, multa vera recepimus, quae in aliis non habentur. Epitome singulorum librorum XIIII Decadum. Historia omnium XIIII Decadum in compendium redacta ab L. Floro. Polybii lib. V de rebus Romanis latinitate donati à Nicolao Perotto. Index copiosissimus rerum omnium memorabilium...

[Histoire romaine (latin). 1518-1533]

Maturation of the lymphoid system. III. Induction of selective unresponsiveness by injection of a haptenated carbohydrate into neonatal mice.

Neonatal treatment of A/J mice with DNP-Ficoll reduced or eliminated indirect anti-DNP PFC normally produced in response to adult challenge with DNP-keyhole limpet hemocyanin. The remaining direct anti-DNP PFC response was of low avidity. Spleen cells from neonatal A/J mice inhibited the in vitro but not the in vivo response of adult spleen cells to DNP-Ficoll.

Reliure de : Bap. Platinae,... de Vitis ac gestis summorum pontificum ad sua usque tempora liber unus [cum authoris vita ex libro J. Trittemii "de Scriptoribus ecclesiasticis"]. Huic additae sunt vitae ac res gestae eorum qui interim fuere pontificum, a Paulo videlicet II, ad Julium hujus nominis III. Ejusdem item Platinae, de Falso et vero bono dialogi tres ; Contra amores I ; de Vera nobilitate I ; de Optimo cive II ; Panegyricus in Bessarionem,... Oratio ad Paulum II,... de bello Turcis inferendo. [-Panegyrici in Bap. Platinae parentalia.]

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Recursos governatius. Doctrina de la Direcció General de Dret i Entitats Jurídiques III

Comentaris a les Resolucions de la Direcció General de Dret i Entitats Jurídiques de 31 de juliol 2006, de 7 de setembre 2006, de 18 de setembre 2006, de 9 d'octubre 2006, de 30 d¿octubre 2006, de 31 d'octubre 2006 i de 24 de novembre 2006.

Efficient photodynamic therapy of cancer using chemotherapeutic porphyrin-ruthenium metalla-cubes.

Two cationic octanuclear metalla-cubes [Ru(8)(η(6)-C(6)H(5)Me)(8)(tpp-H2)(2)(dhbq)(4)](8+) and [Ru(8)(η(6)-p-iPrC(6)H(4)Me)(8)(tpp-H2)(2)(dhbq)(4)](8+) were prepared and evaluated as dual photosensitizers and chemotherapeutics in cancer cells. In the dark, the complexes presented high cytotoxicity towards only melanoma and ovarian cancer cells. However, the complexes exhibited good phototoxicities toward all cancer cells (1μM concentration, LD(50)=2-7J/cm(2)), thus suggesting a dual synergistic effect with good properties of both the arene ruthenium chemotherapeutics and the porphyrin photosensitizers.

Reliure de : Le Livre des statuts et ordonnances de l'ordre du benoist sainct Esprit estably par le très chrestien roy de France et de Pologne Henry III...

[Acte royal. 1578-12-00. Paris]

Nickel incorporation in Fe(II, III) hydroxysulfate Green Rust: effect on crystal lattice spacing and oxidation products

Ni(II)-Fe(II)-Fe(III) layered double hydroxides (LDH) or Ni-containing sulfate green rust (GR2) samples were prepared from Ni(II), Fe(II) and Fe(III) sulfate salts and analyzed with X ray diffraction. Nickel is readily incorporated in the GR2 structure and forms a solid solution between GR2 and a Ni(II)-Fe(III) LDH. There is a correlation between the unit cell a-value and the fraction of Ni(II) incorporated into the Ni(II)-GR2 structure. Since there is strong evidence that the divalent/trivalent cation ratio in GR2 is fixed at 2, it is possible in principle to determine the extent of divalent cation substitution for Fe(II) in GR2 from the unit cell a-value. Oxidation forms a mixture of minerals but the LDH structure is retained if at least 20 % of the divalent cations in the initial solution are Ni(II). It appears that Ni(II) is incorporated in a stable LDH structure. This may be important for two reasons, first for understanding the formation of LDHs, which are anion exchangers, in the natural environment. Secondly, this is important for understanding the fate of transition metals in the environment, particularly in the presence of reduced Fe compounds.

Oeuvres complètes de Alfred de Vigny. [III]

Collection : Petite bibliothèque littéraire