Interciencia articles from October 2006

Interciencia archives from October 2006

Mission and law/Mision y ley/Missao e lei.(EDITORIAL)(Editorial)
October 1, 2006... In the world of enterprises the mission defines the orientation and basic goal that constitutes the ultimate object of the operation. In the religious world, the initiatives undertaken in order to propagate the faith have been termed missions,...

Petroleum versus alternative energy sources, a future dilemma/Petroleo versus energias alternas dilema futuro/Petroleo versus energias alternativas, dilema futuro.
October 1, 2006... SUMMARY There are evidences that point out towards a permanent oil crisis. In accordance with this premise, the following issues are analyzed: 1) The origin of the higher energy demand; the consumption per region and per habitant, as well...

Identifying priority areas for conservation in Mexican tropical deciduous forest based on tree species/Identificacion de areas prioritarias para la conservacion del bosque tropical caducifolio en Mexico basada en especies arboreas/Identificacao das areas prioritarias para a conservacao do bosque tropical caducifolio no Mexico baseada em especies arboreas.
October 1, 2006... SUMMARY The main objective was to identify and rank areas for the conservation of exclusive, or nearly exclusive, tree species of the tropical deciduous forest in Mexico, a land cover type greatly endangered worldwide. A list of 425...

Multifactorial and participative methodology for the evaluation of agroecological and environmental deterioration of two river basins in Trujillo state, Venezuela/Metodologia multifactorial y participativa para evaluar el deterioro agroecologico y ambiental de dos subcuencas en el estado Trujillo, Venezuela/Metodologia multifactorial e ...
October 1, 2006... SUMMARY A participative and multifactorial methodology was applied to evaluate the agroecological and environmental deterioration of the microbasins Rio Blanco and El Socorro, located in the subbasins of the Escuque and La Palma rivers,...

Cambios en la actividad de [alpha]-amilasa, pectinmetilesterasa y poligalacturonasa durante la maduracion del maracuya amarillo (passiflora edulis var. flavicarpa degener).(REPORTS/COMUNICACIONES/COMUNICACOES)
October 1, 2006... SUMMARY Passion fruit (Passiflora edulis var. Flavicarpa Degener) is a tropical fruit well known for its distinctive flavor. The responsible components for this flavor are developed during ripening as a result of the increase in metabolic...

Inducción de callo embriogenico en eucalyptus globulus labill.
October 1, 2006... SUMMARY Embryogenic callus induction starting from three explants coming from mature seeds (mature zygotic embryos, hypocotils and cotyledons) was studied. The results indicated that the medium 13 (B5 + ANA 0.5mg x [l.sup.-1] + BAP 1.0mg x...

Regimen optimo para plantaciones de eucaliptos en Brasil: un analisis no determinista.
October 1, 2006... SUMMARY Distinct from other plantations, Eucalyptus plantation managers have to decide whether all trees will be replaced by new seedlings after a harvest or simply allowed to regenerate from the sprouting stumps. Defining the length and...

Composicion quimica y actividad toxica del aceite esencial de Simsia pubescens Triana.
October 1, 2006... SUMMARY From the leaves of Simsia pubescens Triana (Asteraceae) an essential oil was obtained by steam distillation. It is a yellow oil with an agreeable odor, and its toxic activity was determined by the brine shrimp Artemia salina Linn....

Efecto del amamantamiento retrasado en la actividad posparto de las vacas y en los becerros de doble proposito.
October 1, 2006... SUMMARY The pourpose of this study was to estimate the effects of delayed suckling on daily weight gain (GDP) and milk intake (CL) of calves before weaning, as well as time from parturition to the next ovulation (IPPO), total follicle...

Tasa de filtracion e ingestion de simocephalus vetulus (Muller, 1776) (crustacea: cladocera) alimentado con selenastrum capricornutum printz, 1914 y Chlorella vulgaris Beijerinck, 1890.
October 1, 2006... SUMMARY Cladocera are microfiltering organisms, with a high potential to be used as alive food by diverse fish species, both in ornamental fish and intensive aquaculture. Therefore it is important the study of filtration and ingestion...

Evaluacion quimico-nutricional de Lupinus exaltatus Zucc, del Nevado de Colima, Mexico, como fuente potencial de forraje.
October 1, 2006... SUMMARY With the purpose of studying the forage potential of Lupinus exaltatus, neutral detergent fiber (NDF), acid detergent fiber (ADF), non-protein nitrogen (NPN), alkaloids and in situ digestibility of seed, foliage, mature pod and...

Dinamica y manejo de poblaciones: modelos unidimensionales.(Reseña de libro)
October 1, 2006... Dinamica y manejo de poblaciones: modelos unidimensionales (2003) Miguel F. Acevedo y Josep Raventos. Publicaciones de la Universidad de Alicante. Alicante, Espana. 282 pp. En 1662, John Graunt recopilo informacion demografica de la ciudad...

Sobre Diversidad Biologica: el Significado de las Diversidades Alfa, Beta y Gamma.(Reseña de libro)
October 1, 2006... Sobre Diversidad Biologica: el Significado de las Diversidades Alfa, Beta y Gamma (2005) Halffter G, Soberon J, Koleff R Melic A (Eds.) Monografias 3ercer Milenio. SEA / CONABIO / DIVERSITAS / CONACYT. Zaragoza, Espana. 242 pp. Seria facil...