Does Biodiesel from Jatropha CurcasRepresent a Sustainable Alternative Energy Source?
Isidro Ovando-Medina, Francisco Espinosa-García, Juan
Núñez-Farfán and Miguel Salvador-Figueroa.
Abstract
Various government agencies around the world have proposed vegetable oils and their conversion to biodiesel as a renewable alternative to fossil fuels. Due to its adaptability to marginal soils and environments, the cultivation ofJatropha curcas is frequently mentioned as the best option for producing biodiesel. In the present work the current situation of proven and potential reserves of fossil fuel, and the production and consumption model for the same are analyzed, in order to later review the sustainability of the production process which begins with the cultivation of J. curcas, and culminates with the consumption of biodiesel. A review of the following topics is proposed in order to improve the sustainability of the process: areas destined for cultivation, use of external (chemical) inputs in cultivation, processes for converting the vegetable oil to biodiesel, and, above all, the location for ultimate consumption of the biofuel.
Download in PDF from: http://www.mdpi.com/2071-1050/1/4/1035/pdf
Influencia de la inoculación de diazótrofos y del tipo de suelo en la germinación y crecimiento inicial de Jatropha curcas L.
Does Biodiesel from Jatropha CurcasRepresent a Sustainable Alternative Energy Source?
Isidro Ovando-Medina, Francisco Espinosa-García, Juan
Núñez-Farfán and Miguel Salvador-Figueroa.
Abstract
Various government agencies around the world have proposed vegetable oils and their conversion to biodiesel as a renewable alternative to fossil fuels. Due to its adaptability to marginal soils and environments, the cultivation ofJatropha curcas is frequently mentioned as the best option for producing biodiesel. In the present work the current situation of proven and potential reserves of fossil fuel, and the production and consumption model for the same are analyzed, in order to later review the sustainability of the production process which begins with the cultivation of J. curcas, and culminates with the consumption of biodiesel. A review of the following topics is proposed in order to improve the sustainability of the process: areas destined for cultivation, use of external (chemical) inputs in cultivation, processes for converting the vegetable oil to biodiesel, and, above all, the location for ultimate consumption of the biofuel.
Download in PDF from: http://www.mdpi.com/2071-1050/1/4/1035/pdf
Ingrid Donají, Lourdes Adriano, Isidro Ovando y Miguel Salvador.
Download in PDF from:http://sistemas.fciencias.unam.mx/~germoplasma/files/s8sc/Donaji%20et%20al.pdf
Ex vitro survival and early growth of Alpinia purpurata plantlets inoculated with Azotobacter and Azospirillum.
Abstract
The survival rate, shoot and root dry mass, shout number, plant growth, stem height and diameter, number of leaves and root length were measured in micropropagated plantlets of Alpinia purpurata (Red ginger) inoculated with Azospirillum sp. 11B and Azotobacter sp. Pachaz 008 at 10(7), 10(8) and 10(9) cells cm(-3) using a complete randomized experimental design. Inoculation ofA. purpurata plantlets with the Azospirillum sp. 11B or Azotobacter sp. PACHAZ 008 strains induced larger stem diameter, root dry mass, number of shoots and increased their survival rate from 77 to 100% compared to plantlets without inoculation, while other plant characteristics were not affected.
Download in PDF from: http://docsdrive.com/pdfs/ansinet/pjbs/2007/3454-3457.pdf
Micropropagación de plantas ornamentales tropicales en medios de cultivo basados en "humus líquido" de vermicomposta.
Gemelli López Martínez, Isidro Ovando Medina, Lourdes Adriano A., Raúl Cuevas González y Miguel Salvador F.
Download in PDF from:
http://www.smbb.com.mx/congresos%20smbb/puertovallarta03/TRABAJOS/AREA_XI/CARTEL/CXI-17.pdf
Current List of the Native Bromeliads of Soconusco, Chiapas, Southeast Mexico.
Dayam Santiago , Sonia Ruiz , Lourdes Adriano , Miguel Salvador and Isidro Ovando-Medina.
Abstract
In Central America, native bromeliads are an alternative for productive diversification in coffee plantations; however, first, a census in each area should be carried out and inventories must be up-dated. During 2004 and 2005, field explorations were carried out in the Soconusco region, on the Mexico/Guatemala border, in order to collect live specimens and to create a reference collection of plants in the University (UNACH, Universidad Autónoma de Chiapas, Tapachula). To verify if the collected species were native or not, an ethnobotanical study was carried out, with semi-structured interviews applied to people from the visited communities; the information was then compared with the literature. The study revealed few uses of native bromeliads. To date, we have 186 accessions which had been characterized and classified in 6 genera and 29 species. This number of species comprises only 22.8% of the bromeliads of Chiapas, but represents a high density of species (3.113 species/1000 km2). Most of the accessions are from middle altitudes (500-1500 m.a.s.L.). We present the first inventory of the flora Bromeliaceae for the region of Soconusco.
Download in PDF from: http://198.170.104.138/ijb/2006/64-68.pdf
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