Interciencia articles from April 2006

Interciencia archives from April 2006

The governance of the risks of science and technology/La gobernabilidad de los riesgos de la ciencia y tecnologia/A governabilidade dos riscos da ciencia e tecnologia.(EDITORIAL)
April 1, 2006... Today we live in a world where more and more risks and dangers are perceived. For the first time in modern history, knowledge, which has been almost universally considered as a public good that should be supported, generates risks and dangers...

Formulation of nutrient solutions for plant nutrition studies. A proposal/Proposta para a formulacao de solucoes nutritivas em estudos de nutricao vegetal/Propuesta para la formulacion de soluciones nutritivas en estudios de nutricion vegetal.
April 1, 2006... SUMMARY Several studies in plant nutrition have been done in the past using nutrient formulations. In order to evaluate the effect of one or more nutrients on crop growth, development, yield, quality product as well as nutrient uptake,...

Historic development of winter-wheat yields in five irrigation districts in the Sonora desert, Mexico/Historia del desarrollo del cultivo invernal de trigo en cinco distritos de riego en el desierto Sonora, Mexico/Historia do desenvolvimento do cultivo de inverno do trigo em cinco distritos de irrigacao no deserto de Sonora, Mexico.
April 1, 2006... SUMMARY The history of development of winter wheat cultivation in five irrigation districts in northwestern Mexico is analyzed. The accelerated growth of winter wheat yields in northwestern Mexico can be described by adjustment of the...

Effect of phytase supplementation to diets for weanling pigs on the utilization of phosphorus and calcium/Efecto de la suplementacion de fitasa en dietas para cerdos recien destetados sobre la utilizacion de fosforo y calcio/Efeito da fitase suplementar em dietas para suinos desmamados com a utilizacao de fosforo e calcio.(REPORTS/COMUNICACIONES/COMUNICACOES)
April 1, 2006... SUMMARY Four experiments were conducted with weanling pigs to determine the effect of phytase supplementation to four diet types on the apparent total tract digestibility and retention of P and Ca. Phytase was supplemented at rates of O,...

Stabilized sludges and bacterial strains for bioremediation of oil contaminated soils/Lodos estabilizados y cepas bacterianas en la biorremediacion de suelos contaminados con hidrocarburos/Lodos estabilizados e cepas bacterianas na biorremediacao de solos contaminados com hidrocarbonetos.(REPORTS/COMUNICACIONES/COMUNICACOES)
April 1, 2006... SUMMARY The utilization of native bacterial strains and application of stabilized sludges during bioremediation of a soil were studied using contaminated soil from field "Moga", Zulia state, Venezuela. Bacterial strains were isolated and...

Damages caused by wild vertebrate species in corn crops at the Lacandon Forest, Chiapas, Mexico/Danos ocasionados por vertebrados silvestres al cultivo de maiz en la Selva Lacandona, Chiapas, Mexico/Danos ocasionados por vertebrados silvestres ao cultivo de milho na Selva Lacandona, Chiapas, Mexico.(REPORTS/COMUNICACIONES/COMUNICACOES)
April 1, 2006... SUMMARY The purpose of this study was to identify wild vertebrate species causing damage in com crops at the Lacandon Forest of Chiapas, Mexico, and to estimate and compare losses in com plots with different traits, such as water...

Indicators of inter-center scientific co-operation in Latin American countries/Indicadores de colaboracion cientifica inter-centros en los paises de America Latina/Indicadores de colaboracao cientifica inter-centros nos paises de America Latina.(REPORTS/COMUNICACIONES/COMUNICACOES)
April 1, 2006... SUMMARY Indicators of scientific cooperation from 24 Latin American and Caribbean countries were obtained through the study of their mainstream publications signed by scientists from two or more institutions from Latin American countries,...

Phosphorus dynamics and exchangeable aluminum reduction in a haplustults on the conservationist handling/Dinamica del fosforo y reduccion del aluminio intercambiable en un ultisol sometido a manejo conservacionista/Dinamica do fosforo e reducao do aluminio intercambia vel em um ultisol submetido a manejo conservacionista.(REPORTS/COMUNICACIONES/COMUNICACOES)
April 1, 2006... SUMMARY The effects of conservationist procedures such as minimal tillage, acid resistant cultivars, rotation of cultures and combinations of organic and inorganic fertilizers upon the dynamics of P availability and the sustainability of a...

Cell phone location using neural networks/Localizacion de moviles en telefonia celular usando redes neuronales/Localizacao de dispositivos moveis na telefonia celular usando redes neuronais.(REPORTS/COMUNICACIONES/COMUNICACOES)
April 1, 2006... SUMMARY A method based in neural networks is proposed to estimate the location of mobile phones in emergency situations. The approach to the problem is probed under different communication channels such as multiple paths and lost paths, as...

Comportamiento adsortivo-desortivo del Lindano en un suelo agricola/Adsorptive-desorptive behaviour of Lindane in an agricultural soil/Comportamento adsortivo-dessortivo do Lindanao em um solo agricola.(REPORTS/COMUNICACIONES/COMUNICACOES)
April 1, 2006... SUMMARY The purpose of this work was to evaluate the adsorptive-desorptive behavior of the pesticide lindane on an agricultural soil rich in organic matter, using the differential coefficient of hysteresis concept (C[H.sub.Poggi]). Lindane...

Risk factors associated to Type 2 Diabetes Mellitus in Warao Indians/Factores de riesgo asociados a Diabetes Mellitus Tipo 2 en indios Waraos del Delta Amacuro, Venezuela/Fatores de risco associados a Diabetes Mellitus Tipo 2 en indios Waraos do Delta Amacuro, Venezuela.(REPORTS/COMUNICACIONES/COMUNICACOES)
April 1, 2006... SUMMARY The occurrence of Diabetes Mellitus Type 2 and other metabolic alterations associated to feeding habits and physical daily activity was determined in an indigenous isolated population. Warao natives (21-50 years old, 31 male and 13...

Forthcoming events/Reuniones venideras/Proximas reunioes.(Calendario)
April 1, 2006... REUNIONES VENIDERAS / FORTHCOMING EVENTS / PROXIMAS REUNIOES REUNION / EVENT LUGAR / LOCATION FECHA / DATE XLI CONGRESO NACIONAL DE Manzanillo, Mexico 28 a1 31 mayo ENTOMOLOGIA ...