Une campagne en Kabylie : récit d'un chasseur d'Afrique ; Les années de collège de Maître Nablot ; Une veillée au village ; Le pâté de lapin / par Erckmann-Chatrian ; illustrés de 22 dessins par Théophiles Schuler ; gravures par Pannemaker

Collection : Contes et romans alsaciens

Diplóides (AA) de bananeira submetidos ao estresse salino

No Nordeste do Brasil a salinização dos solos é um dos fatores limitantes na produção de bananeira. Estudos quanto à tolerância à salinidade em diplóides de bananeira são importantes para programas de melhoramento genético. Esse trabalho objetivou avaliar os efeitos da salinidade utilizando variáveis químicas e de crescimento, e quantificar, mediante padrões isoenzimáticos, a diversidade genética entre seis genótipos diplóides (AA), associando-os à tolerância à salinidade. As plantas foram tratadas durante 21 dias com 0, 50 e 100 mM de NaCl, num delineamento experimental inteiramente casualizado. Os diplóides Lidi e Calcuttá apresentaram maiores reduções na área foliar e fortes sintomas de toxidez associados aos maiores acúmulos de Na+ e Cl- no limbo. Os genótipos Borneo e SNº/2 apresentaram discretos sintomas de toxidez e, como o genótipo M-53, demonstraram habilidade de evitar a translocação excessiva de Na+ e Cl- para as folhas preservando o aparelho fotossintético. Nos diplóides SNº/2 e M-53 foi detectada uma banda específica (Po-6) do sistema peroxidase, sob condições de estresse salino. Associando as características isoenzimáticas com as de crescimento, sintomatologia, análise mineral e grau de similaridade genética entre os genótipos, os dendrogramas construídos separam os genótipos mais tolerantes (SNº/2 e M-53) dos mais sensíveis (Lidi e Calcuttá).

Quines són les necessitats espirituals en els adolescents afectats de càncer en situació de malaltia avançada-terminal, en una unitat de cures pal·liatives?

En les cures pal·liatives pediàtriques es contemplen les dimensions essencials de la persona: la física, la psicològica, la social i l’espiritual. Tot i que s’han fet estudis sobre la dimensió espiritual, en la revisió bibliogràfica es mostra que és un àmbit poc desenvolupat. És important conèixer l’aspecte de creences i valors per tal que la infermera oncològica, juntament amb altres professionals, puguin proporcionar una atenció holística. L’objectiu d’aquest estudi és identificar les necessitats espirituals en adolescents (13 a 18 anys) malalts de càncer en situació avançada-terminal. S’utilitza la metodologia qualitativa. La mostra és de vuit adolescents, que són seleccionats d’acord amb els criteris d’inclusió. Aquests seran entrevistats per la infermera, la investigadora, la qual realitzarà entrevistes semiestructurades i un fotomuntatge depenent de la predisposició de l’adolescent. L’àmbit de realització d’aquest estudi és en un hospital de tercer nivell on es proporcioni atenció especialitzada amb pediatria oncològica i, concretament, en una unitat de cures pal·liatives pediàtriques. Per finalitzar, és important tenir en compte que les entrevistes i el fotomuntatge poden tenir les seves limitacions i que no sempre s’obtingui el resultat esperat.

Quins són els factors que incrementen la motivació dels alumnes a les classes d'educació física?

L‟objectiu de l‟estudi és observar els diferents factors que fan incrementar la motivació dels alumnes a les classes d‟Educació Física. Aquesta recerca té com a finalitat descriure i interpretar el clima motivacional que envolta les sessions d‟Educació Física mitjançant l‟estudi de dos mestres de l‟especialitat. L‟estudi es centra en l‟observació de les diferents estratègies que utilitzen els docents per afavorir el clima motivacional a les sessions d‟Educació Física en els cursos de segon i tercer d‟Educació Primària. Aquesta recerca té com a base teòrica l‟estudi realitzat prèviament per diferents autors, com per exemple, Cecchini (2002), Cervelló (2005) i Pascual (2011). Paraules clau: Motivació, Educació Física, clima motivacional, entusiasme del docent, tasca, l‟autoritat del docent, el reconeixement del docent, grups de treball, l‟avaluació i el temps de treball.

Totes les vacances són diferents. És més beneficiós fer el descans anual sempre a la mateixa època i recordar-lo

Les vacances, el descans mensual, ens influeixen des del punt de vista psicològic i fisiològic, en vista de dos treballs científics recents que analitzen minuciosament els seus efectes.

Isothermal sections of the Ru-Si-Ge, Ru-Ge-Sn and Ru-Si-Sn systems at 900°C

The ternary systems Ruthenium-Silicon-Germanium, Ruthenium-Germanium-Tin and Ruthenium-Silicon-Tin were investigated by powder X-ray diffraction and electron microprobe analysis. Relations at 900 degrees C between solid phases are given and no ternary compound was found. Solubilities and evolution of lattice parameters have been correlated. Maximum mutual solubilities in the Si-Sn and Ge-Sn systems are given. (C) 1998 Elsevier Science S.A.

Galvanomagnetic effects in strongly doped p-Bi2Te3:Sn crystals

Magnetic field dependencies of Hall coefficient and magnetoresistivity are investigated in classical and quantizing magnetic fields in p-Bi2Te3 crystals heavily doped with Sn grown by Czochralsky method. Magnetic field was parallel to the trigonal axis C3. Shubnikov-de Haas effect and quantum oscillations of the Hall coefficient were measured at temperatures 4.2 K and 11 K. On the basis of the magnetic field dependence of the Hall coefficient a method of estimation of the Hall factor and Hall mobility using the Drabble- Wolf six ellipsoid model is proposed. Shubnikov-de Haas effect and quantum oscillations of the Hall coefficient were observed at 4.2 K and 11 K. New evidence for the existence of the narrow band of Sn impurity states was shown. This band is partly filled by electrons and it is overlapping with the valence states of the light holes. Parameters of the impurity states, their energy ESn - 15 meV, band broadening ¿<< k0T and localization radius of the impuritystate R - 30 Å were obtained.

Complexes of Pd(II) and Pt(II) with 9-aminoacridine: reactions with DNA and study of their antiproliferative activity

Four new metal complexes {M = Pd(II) or Pt(II)} containing the ligand 9-aminoacridine (9AA) were prepared. The compounds were characterized by FT-IR and 1H, 13C, and 195Pt NMR spectroscopies. Crystal structure of the palladium complex of formulae [Pd(9AA)(μ-Cl)]2 · 2DMF was determined by X-ray diffraction. Two 9-acridine molecules in the imine form bind symmetrically to the metal ions in a bidentate fashion through the imine nitrogen atom and the C(1) atom of the aminoacridine closing a new five-membered ring. By reaction with phosphine or pyridine, the Cl bridges broke and compounds with general formulae [Pd(9AA)Cl(L)] (where L = PPh3 or py) were formed. A mononuclear complex of platinum of formulae [Pt(9AA)Cl(DMSO)] was also obtained by direct reaction of 9-aminoacridine and the complex [PtCl2(DMSO)2]. The capacity of the compounds to modify the secondary and tertiary structures of DNA was evaluated by means of circular dichroism and electrophoretic mobility. Both palladium and platinum compounds proved active in the modification of both the secondary and tertiary DNA structures. AFM images showed noticeable modifications of the morphology of the plasmid pBR322 DNA by the compounds probably due to the intercalation of the complexes between base pairs of the DNA molecule. Finally, the palladium complex was tested for antiproliferative activity against three different human tumor cell lines. The results suggest that the palladium complex of formula [Pd(9AA)(μ-Cl)]2 has significant antiproliferative activity, although it is less active than cisplatin.

Complexes of Pd(II) and Pt(II) with 9-aminoacridine: reactions with DNA and study of their antiproliferative activity

Four new metal complexes {M = Pd(II) or Pt(II)} containing the ligand 9-aminoacridine (9AA) were prepared. The compounds were characterized by FT-IR and 1H, 13C, and 195Pt NMR spectroscopies. Crystal structure of the palladium complex of formulae [Pd(9AA)(μ-Cl)]2 · 2DMF was determined by X-ray diffraction. Two 9-acridine molecules in the imine form bind symmetrically to the metal ions in a bidentate fashion through the imine nitrogen atom and the C(1) atom of the aminoacridine closing a new five-membered ring. By reaction with phosphine or pyridine, the Cl bridges broke and compounds with general formulae [Pd(9AA)Cl(L)] (where L = PPh3 or py) were formed. A mononuclear complex of platinum of formulae [Pt(9AA)Cl(DMSO)] was also obtained by direct reaction of 9-aminoacridine and the complex [PtCl2(DMSO)2]. The capacity of the compounds to modify the secondary and tertiary structures of DNA was evaluated by means of circular dichroism and electrophoretic mobility. Both palladium and platinum compounds proved active in the modification of both the secondary and tertiary DNA structures. AFM images showed noticeable modifications of the morphology of the plasmid pBR322 DNA by the compounds probably due to the intercalation of the complexes between base pairs of the DNA molecule. Finally, the palladium complex was tested for antiproliferative activity against three different human tumor cell lines. The results suggest that the palladium complex of formula [Pd(9AA)(μ-Cl)]2 has significant antiproliferative activity, although it is less active than cisplatin.

Complexes of Pd(II) and Pt(II) with 9-aminoacridine: reactions with DNA and study of their antiproliferative activity

Four new metal complexes {M = Pd(II) or Pt(II)} containing the ligand 9-aminoacridine (9AA) were prepared. The compounds were characterized by FT-IR and 1H, 13C, and 195Pt NMR spectroscopies. Crystal structure of the palladium complex of formulae [Pd(9AA)(μ-Cl)]2 · 2DMF was determined by X-ray diffraction. Two 9-acridine molecules in the imine form bind symmetrically to the metal ions in a bidentate fashion through the imine nitrogen atom and the C(1) atom of the aminoacridine closing a new five-membered ring. By reaction with phosphine or pyridine, the Cl bridges broke and compounds with general formulae [Pd(9AA)Cl(L)] (where L = PPh3 or py) were formed. A mononuclear complex of platinum of formulae [Pt(9AA)Cl(DMSO)] was also obtained by direct reaction of 9-aminoacridine and the complex [PtCl2(DMSO)2]. The capacity of the compounds to modify the secondary and tertiary structures of DNA was evaluated by means of circular dichroism and electrophoretic mobility. Both palladium and platinum compounds proved active in the modification of both the secondary and tertiary DNA structures. AFM images showed noticeable modifications of the morphology of the plasmid pBR322 DNA by the compounds probably due to the intercalation of the complexes between base pairs of the DNA molecule. Finally, the palladium complex was tested for antiproliferative activity against three different human tumor cell lines. The results suggest that the palladium complex of formula [Pd(9AA)(μ-Cl)]2 has significant antiproliferative activity, although it is less active than cisplatin.

Unbreakable PT symmetry of solitons supported by inhomogeneous defocusing nonlinearity

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