182.
Two Dibenzylbutyrolactol Derivatives and Other Chemical Constituents from Aristolochia peltato-deltoidea - Silva,Ana Paula Freitas da; Palmeira Júnior,Sebastião Ferreira; Conserva,Lucia Maria; Guilhon,Giselle Maria S. Pinheiro
The hexane extract from the aerial parts of Aristolochia peltato-deltoidea Hoehne (Aristolochiaceae) afforded two new epimeric lignans of the type dibenzylbutyrolactol, rel-(8R, 8?S, 9S)-3,4-dimethoxy-3?,4?-methylenedioxy-9beta-ethoxy- and rel-(8R, 8?S, 9R)-3,4-dimethoxy-3?,4?-methylenedioxy-9alpha-ethoxy-lignans-8.8?,9.O.9?, besides a benzofuran neolignan, known as eupomatenoid-7, alpha-tocopherylquinone, beta-sitosterol and stigmasterol. From the chloroform extract were isolated two diastereomeric dibenzylbutyrolactone lignans: rel-(8R, 8?R)- and rel-(8R, 8?S)-3,4-dimethoxy-3?,4?-methylenedioxy-9-oxo-lignans-8.8?,9.O.9?. Chemical composition analysis by GC/MS of the non polar fractions from the hexane extract was also carried out and ten components were identified. The structures of the isolated compounds were elucidated utilizing spectrometric methods.
184.
Resonances for a Contact Wave in Systems of Conservation Laws - Aparecido J. de Souza; Dan Marchesin; Campina Gr; Resumo Ondas; De Contato; Ressonantes Em; Sistemas De; Leis De; Conserva C
. Systems of three or more conservation laws in which a conserved quantity is passively transported have a contact field; sometimes, the contact speed and the speed of one of the nonlinear waves coincide on a surface in state space. We prove that this resonance surface contains the equilibrium points of the contact field. We construct locally the Riemann solution for an example of such a system of three equations, which arises in flow in petroleum reservoirs. Solutions resulting from the resonating waves give rise to new objects, which we call wave surfaces. The complete Riemann solution is obtained by...
187.
The LINE-1 DNA sequences in four mammalian orders predict proteins that conserve homologies to retrovirus proteins. - Fanning, T; Singer, M
Recent work suggests that one or more members of the highly repeated LINE-1 (L1) DNA family found in all mammals may encode one or more proteins. Here we report the sequence of a portion of an L1 cloned from the domestic cat (Felis catus). These data permit comparison of the L1 sequences in four mammalian orders (Carnivore, Lagomorph, Rodent and Primate) and the comparison supports the suggested coding potential. In two separate, noncontiguous regions in the carboxy terminal half of the proteins predicted from the DNA sequences, there are several strongly conserved segments. In one region, these share homology with...
192.
The LINE-1 DNA sequences in four mammalian orders predict proteins that conserve homologies to retrovirus proteins. - Fanning, T; Singer, M
Recent work suggests that one or more members of the highly repeated LINE-1 (L1) DNA family found in all mammals may encode one or more proteins. Here we report the sequence of a portion of an L1 cloned from the domestic cat (Felis catus). These data permit comparison of the L1 sequences in four mammalian orders (Carnivore, Lagomorph, Rodent and Primate) and the comparison supports the suggested coding potential. In two separate, noncontiguous regions in the carboxy terminal half of the proteins predicted from the DNA sequences, there are several strongly conserved segments. In one region, these share homology with...
194.
Recuperación del material científico del antiguo gabinate de física y química que se conserva en el IES Ibáñez Martín de Lorca : aplicaciones en la práctica docente - Delgado Martínez, María de los ángeles; López Martínez, José Damián; Martínez Marín, Vicente; Muñoz Palancas, José Adolfo; Romera Vivancos, María Isabel; IES Ibáñez Martín
Durante el curso 2003-2004 se iniciaron una serie de actividades dirigidas a la catalogación de los instrumentos científicos del gabinete de Física y Química y Agricultura del IES Ibáñez Martín de Lorca (Murcia) implicando en ellas a los alumnos con el objetivo de que aprendieran a valorar el patrimonio del centro, tomando conciencia del proceso histórico que ha implicado a la ciencia, la tecnología y la sociedad. Los alumnos buscaron información en internet y en diferentes archivos (Lorca, Alcalá de Henares, Ciencias Naturales de Madrid, Jardín Botánico de Madrid, Museo Nacional de Ciencia y Tecnología de Madrid, etc) para poder...
195.
Recuperación del material científico del antiguo gabinate de física y química que se conserva en el IES Ibáñez Martín de Lorca : aplicaciones en la práctica docente - Delgado Martínez, María de los ángeles; López Martínez, José Damián; Martínez Marín, Vicente; Muñoz Palancas, José Adolfo; Romera Vivancos, María Isabel; IES Ibáñez Martín
Durante el curso 2003-2004 se iniciaron una serie de actividades dirigidas a la catalogación de los instrumentos científicos del gabinete de Física y Química y Agricultura del IES Ibáñez Martín de Lorca (Murcia) implicando en ellas a los alumnos con el objetivo de que aprendieran a valorar el patrimonio del centro, tomando conciencia del proceso histórico que ha implicado a la ciencia, la tecnología y la sociedad. Los alumnos buscaron información en internet y en diferentes archivos (Lorca, Alcalá de Henares, Ciencias Naturales de Madrid, Jardín Botánico de Madrid, Museo Nacional de Ciencia y Tecnología de Madrid, etc) para poder...
198.
Secagem de tomate (Lycopersicon esculentum Mill) para conserva : estudo de parametros com base na qualidade final - Gisele Anne Camargo
o tomate seco tem apresentado crescente aplicação na culinária brasileira, principalmente, como ingrediente de massas, pizzas e também no consumo imediato. Com a finalidade de estudar a influência de parâmetros de secagem sobre a eficiência do processo e sobre a qualidade do produto final, foi desenvolvida uma pesquisa utilizando tomates de duas variedades: uma variedade industrial (Rio Grande) e outra de tomate de mesa (Debora Plus). Cada uma das variedades foi analisada quanto ao conteúdo de sólidos totais, sólidos solúveis (OBrix)e acidez total.Testes de secagem foram conduzidos à temperatura de 60°C, variando-se os parâmetros: variedade; geometria de corte do fruto...
181.
