Le transit digestif chez le lapin : IV.-Essais de modelisation des transferts d'un marqueur radioactif entre les differents compartiments digestifs

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Le transit digestif chez le lapin. Essais de modelisation des transferts d'un marqueur radioactif entre les differents compartiments digestifs (IV)

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Modifications dans les premières étapes de l'assimilation photosynthétique du carbone chez le maïs sous l'effet du génotype

L’étude des réactions de carboxylations photosynthétiques chez les maïs « WH x WJ » et « INRA 508 » montre qu’une baisse de l’activité photosynthétique chez le maïs « WH x WJ », par rapport au maïs « INRA 508 », s’accompagne de déviations métaboliques au sein des premières réactions qui assurent le transfert du carbone du CO2 atmosphérique vers les composés du cycle de CALVIN-BENSON, via les acides malique et aspartique. Le même comportement métabolique en relation avec la photosynthèse avait déjà été observé antérieurement chez le maïs « W64A » mutant opaque-2 comparé au maïs « W64A » normal, plus productif.A compared study of the C4 photosynthetic pathway carried out on different maize genotypes (« WH x WJ » and « INRA 508 »), showed that in « WH x WJ» maize an important decrease of the photosynthetic rate was associated with marked metabolic deviations. From short pulse and chase experiments with 14CO2 under steady-state photosynthesis it was evidenced that the transfer of carbon from the dicarboxylic acids to CALVIN-BENSON cycle components was decelerated in maize « WH x WJ » as compared with « INRA 508 ». Aspartate was more heavily labeled in « WH x WJ » than in the « INRA 508 » leaves. Conversely the incorporations of 14C into malate and 3-phosphoglycerate were always higher in the « INRA 508 » than in the « WH x WJ » leaves. Previously the same pattern of the 14C distribution was observed in maize mutant « W64A » opaque-2 known to differ from maize « W64A » normal in CO2 uptake rate and dry matter production

Wet Chemistry of Spinel Iron oxide Particles

Various properties of spinel iron oxide nanograins are reviewed, illustrating the broad possibilities of wet chemistry for tailoring materials for a wide range of utilizations, from catalysis and sensors to cast magnetic materials

Infrared spectra of cerium and thorium pentacarbonate complexes

Infrared spectra of Na6[M(CO3)5].12 H2O and (CN3H6)[M(CO3)5]\ub74 H2O complexes (M = Ce,Th) are presented. The spectra are discussed on the basis of the bicoordination of the CO32- groups. The determining effect of the polarizing power of the central ion on the splitting of the V3, (E) vibration of the free carbonate group is evidenced, as well as the role of hydrogen bondings and external cations. \ua9 1982

Infrared determination of the coordination state of CO2-3 ions in cerium and thorium tetracarbonato complexes

Infrared spectra and thermal decomposition curves of Na4(M(CO3)4] \ub7 7H2O and Gm4[M(CO3)4] \ub7 6H2O (Gm = guanidinium cation; M = Ce, Th) are reported. The coordination state of carbonate groups in the complex ions is described on the basis of criteria discussed in the introductory part as derived by theoretical and experimental results. \ua9 1983

Sequence of the rabbit delta s1- casein cDNA

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(Co,Fe)Pt nanoparticles by aqueous route; self-assembling, thermal and magnetic properties

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Manuel Consistent System CS

*INRA, Biometrie, Mission Informatique, Centre de Jouy en Josas Diffusion du document : INRA, Biometrie, Mission Informatique, Centre de Jouy en JosasNational audienc