|
|
|
|
|
| Madrigal-Arias,Jorge Enrique; Argumedo-Delira,Rosalba; Alarcón,Alejandro; Mendoza-López,Ma. Remedios; García-Barradas,Oscar; Cruz-Sánchez,Jesús Samuel; Ferrera-Cerrato,Ronald; Jiménez-Fernández,Maribel. |
| In an effort to develop alternate techniques to recover metals from waste electrical and electronic equipment (WEEE), this research evaluated the bioleaching efficiency of gold (Au), copper (Cu) and nickel (Ni) by two strains of Aspergillus niger in the presence of gold-plated finger integrated circuits found in computer motherboards (GFICMs) and cellular phone printed circuit boards (PCBs). These three metals were analyzed for their commercial value and their diverse applications in the industry. Au-bioleaching ranged from 42 to 1% for Aspergillus niger strain MXPE6; with the combination of Aspergillus niger MXPE6 + Aspergillus niger MX7, the Au-bioleaching was 87 and 28% for PCBs and GFICMs, respectively. In contrast, the bioleaching of Cu by Aspergillus... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioleaching; PCBs; Aspergillus; Gold; WEEE. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822015000300707 |
| |
|
| |
|
|
| García-Cruz,Aleida; Flores-Román,David; García-Calderón,Norma E.; Ferrera-Cerrato,Ronald; Velázquez-Rodríguez,Alma S.. |
| Resumen: En México uno de los principales problemas es la degradación del suelo debido al cambio de su uso como tierras de cultivo; este cambio ocasiona un deterioro que puede llegar a la pérdida total y el afloramiento del tepetate. Los tepetates son capas endurecidas de origen volcánico en zonas del Eje Neovolcánico Transmexicano, presentan bajos porcentajes de materia orgánica y nutrimentos, y una estructura masiva, lo que los hace impermeables y limita el crecimiento de las plantas. El objetivo de este estudio fue evaluar el efecto de tres enmiendas orgánicas, una especie vegetal (Ficus carica L.), micorriza (Glomus spp) y tiempo, en las características físicas y químicas de un tepetate fragmentado. El diseño experimental fue completamente al azar con... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Ficus carica L.; Agregación; Composta; Estabilidad; Estiércol; Vermicomposta. |
| Ano: 2007 |
URL: http://www.scielo.org.mx/scielo.php?script=sci_arttext&pid=S1405-31952007000700723 |
| |
|
|
| Rodríguez-Elizalde,María de los Ángeles; Ferrera-Cerrato,Ronald; Hernández,Mateo Vargas; León,María Teresa Beryl Colinas y; González,Alejandro Manzo; Alarcón,Alejandro. |
| ABSTRACT: Euphorbia cyathophora Murray is a plant species with medicinal and ornamental potential but whose in vitro propagation is unknown. Two experiments were performed to know 1) the effect of light (WL) at 25±2 °C and 20 μmol m-2 s-1 luminous intensity, or darkness at 20±2 °C, for the first 20 days and subsequent placement in light (DKL) as previously described, and 2) the best combination of plant growth regulators: benzyl amino purine (BAP), kynetin (KIN), 2-isopentenyl adenine (2iP) and thidiazuron (TDZ) in combination with naphthaleneacetic acid (NAA) and the effect of both light conditions. The DKL treatment did not promote the growth of leaves, cotyledons, or plantlet height; in contrast, WL produced a more developed root system with early... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Euphorbiaceae; In vitro culture; Phytohormones; Light conditions. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0103-84782019000900402 |
| |
|
|
|
