Book Reviews by adrian Gutierrez
The project overall objective is the study and thermodynamic analysis about Rankine cycle and its... more The project overall objective is the study and thermodynamic analysis about Rankine cycle and its Modifications. This project aims to discuss the various parameters which affecting the performance gain of this cycle. The project also examines variations Rankine cycle for great powers, such as the Rankine cycle with reheat and regenerative Rankine cycle. The purpose of this project has two clear objectives: the first is to determine which parameters affect the cycle performance increase. And secondly, to study how this performance increase affect in fuel savings and CO2 emissions. To prepare the work and the calculation of the various represented cycles has been required "Cyclepad". A computer simulation of thermodynamic cycles, which has streamlined the process of calculating the various cycles studied in this project.
En este trabajo se reporta la preparación por el método sol-gel de catalizadores de TiO2 modifica... more En este trabajo se reporta la preparación por el método sol-gel de catalizadores de TiO2 modificado con diferentes cantidades de Sn (TiO2-Sn(x)), con relaciones molares x = 0.0, 0.1, 0.2, 0.3, 0.4, y 0.5. Los resultados muestran que el método de síntesis favorece la formación de la fase anatasa del TiO2 y que la incorporación de estaño en relaciones molares mayores a 0.3 promueve la formación de la fase rutilo. La proporción de fases cristalinas en cada formulación cambia en función del contenido de estaño incorporado. El desempeño fotocatalítico de los catalizadores se evaluó en la reacción de degradación de algunos Anti-Inflamatorios No Esteroideos (AINES) presentes en aguas residuales provenientes de la industria farmacéutica. De los resultados se observa que los fotocatalizadores que contienen estaño, al ser irradiados con luz solar, muestran un incremento en su actividad fotocatalítica con respecto al TiO2 usado como referencia. En el caso de irradiación con luz ultravioleta, para la degradación de los fármacos naproxeno e ibuprofeno, se observó un comportamiento selectivo en función del contenido de estaño
Papers by adrian Gutierrez
Revista Galega de Economía, Jul 19, 2015
Resumo Neste artigo preséntanse varias ideas orixinais que poden cambiar o punto de vista tradici... more Resumo Neste artigo preséntanse varias ideas orixinais que poden cambiar o punto de vista tradicional nas operacións financeiras; tamén se propón o seu uso en situacións que non son as estándares. A metodoloxía considerada baséase en que a taxa de interese nunca debe ser a única variable a ter en conta á hora de analizar as operacións financeiras. Ata podería sosterse que algunhas crises económicas breves pódense esquivar mediante o emprego dun sistema contable o suficientemente flexible. Ademais, se se incorporan nas fórmulas de capitalización outros factores que reflexan a situación económica, as leis correspondentes varían substancialmente.
Copeia, 2013
Dewlap coloration of anoles is diverse and both carotenoid and pterin pigments play a role in gen... more Dewlap coloration of anoles is diverse and both carotenoid and pterin pigments play a role in generating this color variation. In the present study, we examined the carotenoid and pterin concentrations responsible for generating color variability in the proximal, central, and marginal dewlap sections in three subspecies of Anolis jubar of the Cuban southern coast (A. j. oriens, A. j. maisiensis, and A. j. albertschwartzi). With the exception of pterins-likely drosopterins-(entirely absent in A. j. albertschwartzi and in the scales proximal to the dewlap base in the three subspecies), the dewlap colors were produced by the combination of the two pigment classes. Carotenoid levels differed by section in A. j. oriens and A. j. maisiensis, being highest in the central section of dewlap. Anolis j. oriens had higher pterin concentration than A. j. maisiensis in both central and marginal sections. Carotenoid concentrations were significantly higher than pterin concentrations, excepting the central section of A. j. oriens, in which no significant differences were found between pigments. Our findings demonstrate subspecies-level variation in dewlap pigmentation in Cuban A. jubar and have implications for cellular mechanisms responsible for phenotypic variation.
Uploads
Book Reviews by adrian Gutierrez
Papers by adrian Gutierrez