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Francisco I. Madero, Mexico

Vazquez-Luna D.,Golfo University
Ecological Indicators | Year: 2015

This study evaluated the toxic effects of total petroleum hydrocarbons (TPH) on growth of the legumes Crotalaria incana L. and Leucaena leucocephala Lam., and on the development of nitrogen-fixing soil microorganisms, using biological toxicity indices and the toxicity potential index (TPIc), which enable comparison of effects of exposure time and concentration. Growth and biomass accumulation in both plant species decreased with high pollutant concentrations. The EC50 and the NOEC were not identified for either species. The Phytotoxicity Relative Index showed that root length was most strongly affected by the oil, and the Impact Index on Nitrogen Fixer Microorganisms indicated that, despite damage to the root system, L. leucocephala rhizosphere bacteria doubled at 10,000 mg kg-1 TPH after of 240 days of exposure. Finally, the TPIc revealed that C. incana was more sensitive than L. leucocephala to chronic TPH toxicity and might strongly depend on beneficial soil bacteria. © 2015 Published by Elsevier Ltd.

Perez-Hernandez G.,CINVESTAV | Perez-Hernandez G.,Golfo University | Vega-Poot A.,CINVESTAV | Perez-Juarez I.,CINVESTAV | And 5 more authors.
Solar Energy Materials and Solar Cells | Year: 2012

ZnO is a promising material for application in dye-sensitized solar cells, related to its attractive electrical properties and the facile preparation of nanomaterials, with excellent control over the structure and morphology. In this work ZnO-based dye-sensitized solar cells were prepared, and the effect of the presence of a compact ZnO interlayer between the transparent conducting oxide (TCO) electrode and the nanostructured, mesoporous ZnO film on the performance of the solar cell is reported. The compact interlayer was deposited using planar rf magnetron sputtering, and the ZnO nanomaterial was prepared by forced hydrolysis from zinc acetate in ethanol solution. The presence of the compact interlayer has a positive effect on the overall characteristics of the solar cell and decreases the recombination rate from the TCO substrate, resulting in a higher open circuit voltage under low light conditions. The best efficiency of non-optimized solar cells at 1 sun was 4.0%. © 2012 Elsevier B.V. All rights reserved.

Golfo University | Entity website

EVENTOS ACADEMICOS Durante el proceso de educacin de nuestros alumnos de Preparatoria y Universidad, realizamos diferentes eventos acadmicos, deportivos y culturales que coadyuvan a complementar su desarrollo humano y profesional, exaltando siempre los valores universales en los que debe sustentarse toda sociedad civilizada, buscando siempre brindar una nueva gama de conocimientos y actividades multidisciplinarias que fortalezcan integralmente su formacin

Golfo University | Entity website

Reconocimiento Oficial de Validez de Estudios otorgados por el Gobierno del Estado de Tamaulipas segn Decreto No. 290 del 22 de Abril de 1977 publicado en el Perodico Oficial Tomo CII Num ...

Golfo University | Entity website

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