Este artigo apresenta a trajetoria historica do ensino tecnico agricola no Estado de Sao Paulo, de 1882 a 2001, com destaque para os aspectos normativos e politicos de transicao de orgaos gestores e ruptura na construcao e consolidacao de um projeto pedagogico-curricular desta area do ensino tecnico e de politicas institucionais dessas escolas tecnicas. Focaliza, assim, as importantes mudancas de carater politico-normativas e pedagogico-organizacionais que delinearam a construcao da sua especificidade.Isto porque e necessario conhecer a historia do ensino tecnico ‘agricola’ (area agropecuaria) a fim de subsidiar a analise de sua configuracao atual e divisar novas perspectivas para sua gestao.O ensino agricola paulista foi alvo de constantes indefinicoes politicas quanto aos seus principios e fins.As varias transferencias e realocacoes a que foi submetido passando por diferentes Secretarias Estaduais, revelam os entraves politicos quanto a sua gestao e a dificuldade de situa-lo em um locus apropriado e condizente aos seus fins.

This paper is part of ongoing research on genres as (inter)cultural mediators in the teaching of Spanish as a foreign language. It aims at analyzing a textbook which was evaluated by a national program in Brazil. Results show that genres are not always appropriately used in terms of an intercultural approach.

New polynitro compounds containing a carbonyl biscarbamate moiety derived from the precursor carbonyldiisocyanate were synthesized. In addition, 2, 2-dinitropropane-1, 3-diyl bis(2, 2,2-trinitroethylcarbamate) and 2, 2-dinitropropane-1, 3-diyl bis(2, 2,2-trinitroethyl) dicarbonate, were synthesized using 2, 2-dinitropropane-1, 3-diol as starting material. The compounds were characterized by using the analytical methods, single-crystal X-ray diffraction, vibrational spectroscopy (IR and Raman), multinuclear NMR spectroscopy, elemental analysis, and mass spectrometry. The thermal behavior was investigated with DSC measurements. The suitability of the compounds as potential oxidizers in energetic formulations was determined. The heats of formation of the compounds were calculated with GAUSSIAN 09. The detonation parameters such as the detonation pressure, velocity, energy, and temperature were computed using the EXPLO5 code. For a secure handling of the materials, the sensitivity towards impact, friction, and electrical discharge was tested using the BAM drop hammer, BAM friction tester as well as a small-scale electrical discharge device, respectively.