Interciencia articles from February 2007

Interciencia archives from February 2007

How not to be in the mainstream and be recognized/Como no estar en la corriente principal y ser reconocido/Como nao estar na corrente principal e ser reconhecido.(Editorial)(Editorial)
February 1, 2007... Scientific research has, at least, three main purposes: 1) to increase man's knowledge about the universe and about himself, 2) to provide benefits to society through its contribution to the improvement of the quality of life and the...

The observational data collection system. Information technology for Venezuelan astronomy/El sistema de coleccion de datos observacionales. Informatizacion para la astronomia venezolana/O sistema de colecao de dados observacionais. Informatizacao para a astronomia Venezuelana.
February 1, 2007... SUMMARY The Observational Data Collection System for the J. Stock Telescope at the Venezuelan National Astronomical Observatory is presented. The system was implemented to provide support for projects headed by astronomers from various...

Characterization of dairy farms for the implantation of a system of denominations of origin. The case of Turrialba cheese in Costa Rica/Caracterizacion de explotaciones de vacuno lechero para la implantacion de un sistema de denominaciones de origen. El caso del queso Turrialba en Costa Rica/Caracterizacao de exploracoes de leite bovino para a implantacao de um sistema de denominacoes de origem. O caso do queijo Turrialba na Costa Rica.
February 1, 2007... SUMMARY Costa Rica lacks a management structure for Protected Geographical Indications (PGI). Costa Rican legislation first introduced regulations on designations of origin (DO) in the Law of Marks and other distinguishing signs in...

Ovarian follicular growth in domestic animals: a review/Crecimiento folicular ovarico en animales domesticos: una revision/Crescimento folicular ovariano em animais domesticos: uma revisao.
February 1, 2007... SUMMARY Follicular development during a reproductive cycle in the ovaries of most domestic animals follows a pattern of two or three waves or groups. During that process, three different physiological events have been identified:...

Alterations of the hydrologic regime and their effects in the phosphorus and phosphates in Lake Chapala, Mexico/Modificaciones en el regimen hidrologico y sus efectos en la acumulacion de fosforo y fosfatos en el Lago de Chapala, Mexico/Modificacoes no regimen hidrologico e seus efeitos na acumulacao de fosforo e fosfatos no Lago de Chapala, Mexico.
February 1, 2007... SUMMARY As a result of water inflow reduction and contamination, as well as water volume loss due to water extraction, since several years ago Lake Chapala undergoes a process of cultural eutrophication due to excess of nutrients, placed...

Diversity of arbuscular mycorrhizal fungi (AMF) and mycorrhizal potential of the soil from a natural and a disturbed Savannah from La Gran Sabana, Venezuela.
February 1, 2007... SUMMARY The benefits provided by arbuscular mycorrhizas (AM) to plants are well known, especially those related to the improvement of mineral nutrition and protection against root pathogens, among others. Although 80% of vascular plants...

Evaluacion de lodos residuales como abono organico en suelos volcanicos de uso agricola y forestal en Jalisco, Mexico.(REPORTS/COMUNICACIONES/COMUNICACOES)
February 1, 2007... SUMMARY Sewage sludge applications to agricultural and forest soils represent an important alternative for reuse of materials with a high nutrient content. The effects of different application rates of sewage sludge as organic fertilizer...

Toxicity of Petiveria alliacea L. on Greenhouse Whitefly (Trialeurodes vaporariorum West.).(REPORTS/COMUNICACIONES/COMUNICACOES)
February 1, 2007... SUMMARY Several natural products present in plant extracts have been evaluated for their effectiveness as insecticides. Petiveria alliacea (Phytolaccaceae) is a perennial herb whose distribution includes tropical areas of Mexico and...

Respuestas de la tuna [Opuntia ficus-indica (L.) Mill.] Al NaCl.(REPORTS/COMUNICACIONES/COMUNICACOES)
February 1, 2007... SUMMARY In order to study the effect of NaCl on the physiology of Opuntia ficus-indica, the plant was cultured hydroponically at concentrations of NaCl of 0, 50, 100 and 150mol x [m.sup.-3]. Growth (volume and relative growth rate),...

Gasificacion de residuos de invernadero para la obtencion de energia electrica en el sur de España: ubicacion mediante SIG.(REPORTS/COMUNICACIONES/COMUNICACOES)
February 1, 2007... SUMMARY The technical viability of a gasification plant in the coast of Granada, south of Spain using vegetable biomass from greenhouse residues to produce electrical energy was evaluated. The first step was to establish a model to...