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Cet article répond à la question << Et si? >> soulevée par une détenue et portant sur l'éducation. Émergeant d'un projet de recherche avec des femmes incarcérées, cette question inattendue hante les deux auteurs, tous deux chercheurs en sciences de l'éducation qui, à leur tour, réévaluent le rôle de l'éducation dans des circonstances difficiles. Les auteurs guident leurs recherches en examinant la notion de la natalité de Hannah Arendt comme étant la capacité à se renouveler et en étudiant la revendication de Natasha Livinson selon laquelle la préservation de cette notion de natalité est essentielle à l'éducation. Les auteurs examinent l'écart entre le passé et l'avenir comme un espace potentiel pour imaginer l'éducation autrement, tant à l'intérieur du projet que dans une perspective plus large de l'éducation. This article responds to a 'what-if' question regarding education, raised by a woman inmate. Emerging in the midst of a research project with women in prison, the unexpected question haunts the two authors, both educational researchers, who in turn reconsider education's role in difficult circumstances. For guidance, the authors turn to Hannah Arendt's concept of natality as the capacity to renew, and Natasha Levinson's claim that the preservation of natality is critical to education. The authors examine the gap between past and future as a potential space to imagine education otherwise, within both the project and the larger perspective of education. Keywords: Hannah Arendt, natality, participatory action research, adult education, women and education in prison, This article is our response, though not in the moment, to a thoughtful question offered by a participant during a participatory action research (PAR) project on women's health in prison. [...]

The findings of a study testing the effectiveness of using group inquiry and discourse as a teaching approach in teaching science concepts indicated that it is useful in connecting students' thinking and experience with science concepts. It also produced a learning environment which encouraged collaborative inquiry. The students were able to progress beyond situation- specific explanations into broader and deeper understanding of science concepts.

Kinetic study of the cycloaddition-cycloreversion reactions of the zirconium-imido complex with organic amines and azides reveals that the first step involves reversible (2 + 2) retrocycloaddition, which produces a transient intermediate CP2ZrN double bond Ph. Trapping experiments indicate the involvement of retro (3 + 2) cycloaddition in the azide metathesis. Formation of diazazirconacyclobutane and tetraazazirconacyclopentene complexes involves the addition of Zr double bond NR unit to organic imines and azides, respectively.

The complexes Re2HeL2(mu-dmpm)3 PF6 and ReHL4(mu-dmpm)3 PF6 were formed from the reaction of the dirhenium polyhydride complex, Re2(mu-H)H4(mu-dmpm)3 PF6, with tert-butyl isocyanid, xylyl isocyanide and carbon monoxide. In this reaction, the electronic unsaturation of the polyhydride complex was relieved in a step-wise formation of a new series of lower-valent dirhenium complex. The x-ray structures of the resulting crystals were determined and discussed.

The reactivity of Re2H8(dppe)2 toward dppe and other phosphines and the routes to dirhenium polyhydride complexes that contain the Me2PCH2PMe2 (dmpm) ligand were investigated. Re2H8(dppe)2 reacts with dppe to yield the complex Re2H4(dppe)3. Similar procedures also yielded the mixed-phosphine complexes Re2H4(dppe)2(dppm) and (Re2H5 dppe2 dppm)BF4. The reaction of Re2H8(PMe3)4 with dppe proved to be a better alternative in the production of the mixed dppe-PMe3 complex Re2H4(PMe3)4(dppe). Re2H8(dmpm)2 was synthesized from the Re2(mu-O2CCH3)Cl4(mu-dmpm)2.

Calcified sclerites are common in many invertebrate species and are frequently used as taxonomic indicators; however, little is known about the function of sclerites. To determine whether sclerites could function as antipredator defenses, we conducted field assays in which sclerites from the Indo-Pacific soft corals Sinularia maxima, S. poludactyla, and S. sp. were incorporated into an artificial diet and offered to a natural assemblage of fishes in the field. Sclerites from both the tips and bases of all three species of Sinularia reduced feeding by a natural assemblage of generalist carnivorous fishes off Guam by 27-44%; however, sclerites from the bases of the colonies were 18-51% more deterrent than tip sclerites. The greater effectiveness of sclerites from the bases of the colonies was largely attributable to their high concentrations. Sclerites in the tips of the colonies occurred in mean concentrations from 24 to 58% by dry weight and were generally less than 0.5 mm in length. Sclerites in the bases of the colonies were larger and occurred in average concentrations of 82-88%. Sinularia sclerites were increasingly effective as feeding deterrents with increasing concentration at concentrations less than 30-50% by dry weight. The effectiveness of sclerites as deterrents leveled off at higher concentrations. Sclerite morphology was also important in determining antipredator activity. Although sclerites can play a role in predator deterrence, they can also function in the structural support of colonies. Thus, the sizes, shapes, and abundances of sclerites at different locations within colonies will be determined by their functions at particular locations as well as constraints upon their use or production.

The 2,4-diazametallacyclobutane results from a formal (2+2) cycloaddition reaction with benzaldehyde N-phenylimine applied to Cp2Zr(double bond N-t-Bu)-(THF). The associated hetero-metallacycle, with release of benzaldehyde N-tert-butylimine, results from the reaction of the reaction product with a second molecule of N-phenylimine.