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Institution

Simón Bolívar University

EducationCaracas, Venezuela
About: Simón Bolívar University is a education organization based out in Caracas, Venezuela. It is known for research contribution in the topics: Population & Crystallization. The organization has 5912 authors who have published 8294 publications receiving 126152 citations.


Papers
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Journal Article
TL;DR: In this paper, factores of fertilidad with respecto to a criterios de saneamiento of suelo contaminado with hidrocarburos in an ambiente tropical rural were evaluated.
Abstract: En este trabajo se evaluan factores de fertilidad con respecto a los criterios de saneamiento de suelo contaminado con hidrocarburos en un ambiente tropical rural. Aunque la toxicidad puede afectar la fertilidad en derrames recientes, en general este tipo de impacto es minimo para derrames antiguos y en suelos que han sido remediados y que tienen concentraciones <25000mg TPH/kg de suelo (base seca). Sin embargo, en concentraciones aun muy bajas (~2500mg TPH/kg) se observan afectaciones en el crecimiento de la vegetacion e impactos en varios parametros fisico-quimicos de fertilidad, particularmente sobre la capacidad de campo, temperatura, capacidad de intercambio cationico, repelencia al agua, y porosidad. Estos impactos de toxicidad, asi como los cambios en parametros fisico-quimicos, pueden ser mitigados con el empleo de abonos organicos en concentraciones de 1-4%, resultando en un crecimiento vigoroso de la vegetacion en un ambiente tropical humedo impactado. Se presentan lineamientos de parametros edaficos como criterios de saneamiento para suelos tipicos del tropico.

34 citations

Journal ArticleDOI
15 Sep 2011-Talanta
TL;DR: The results indicate that this carbon paste electrode modified with kaolinite is sensitive and effective for the determination of Pb(2+) in domestic water by differential pulse voltammetry.

34 citations

Journal ArticleDOI
01 Jun 2019
TL;DR: In this paper, the authors analyze how pedagogical strategies in higher education have been transformed by the inclusion of Information and Communication Technologies (ICTs) in recent years, by means of a qualitative approach and an exhaustive documentary review.
Abstract: espanolEl objetivo del presente articulo es analizar como se han transformado las estrategias pedagogicas en la educacion superior con la insercion de las Tecnologias de la Informacion y las Comunicaciones (TICs) en los ultimos anos. Mediante un enfoque cualitativo y una revision documental exhaustiva se realizo un detallado analisis de publicaciones desde el ano 2000 en adelante. Los hallazgos sugieren que en los ultimos anos se ha visto un importante avance de la tecnologia en todos los aspectos cotidianos. Adicionalmente, se evidenciaron aportes significativos que muestran como en Colombia y otros paises, los escenarios educativos han cambiado sustancialmente gracias a las tecnologias que hoy dia se aplican para apoyar el proceso de ensenanza y aprendizaje. Las conclusiones se orientan a que la difusion de estrategias pedagogicas en procesos de ensenanza-aprendizaje mediados por las TIC, fortalece significativamente la labor docente. EnglishThe objective of this article is to analyze how pedagogical strategies in higher education have been transformed by the inclusion of Information and Communication Technologies (ICTs) in recent years. By means of a qualitative approach and an exhaustive documentary review, a detailed analysis of publications since the year 2000 was carried out. The findings and analyses suggest that in recent years there has been an important advance of technology in all aspects of daily life. Additionally, significant contributions were found that show how in Colombia and other countries, the educational scenarios have changed substantially thanks to the technologies that are nowadays applied to support teaching and learning processes. The main conclusion is that the dissemination of pedagogical strategies in teaching-learning processes using ICTs significantly strengthens the teaching work.

34 citations

Journal ArticleDOI
TL;DR: In this paper, a study was carried out in pioneer and successional forest tree species in a lower montane tropical forest with seasonal rains, where the authors tested whether pioneer species feature high hydraulic conductance allowing them to use water profusely at leaf level.
Abstract: This study was carried out in pioneer and successional forest tree species in a lower montane tropical forest with seasonal rains We tested whether pioneer species feature high hydraulic conductance allowing them to use water profusely at leaf level Conversely, forest species may have relatively low hydraulic conductance accompanied with better control over water use This may lead in turn to pioneer species being at a relatively higher risk of shoot water potential falling below the threshold value at which cavitations occur compared to forest Specific hydraulic conductance (K s) measured during the wet season was comparable between pioneers and forest species During drought, K s was significantly reduced, and species of both plant groups responded to this by modifying the relationship between conducting area and leaf area (Huver value), such that leaf specific conductivity (K l) was unaffected Thus, leaf area seemed to be adjusted to maintain constant hydraulic sufficiency during drought Pioneer species were more efficient in conducting water to their leaves but had low control over water use compared to forest species A trade-off between water transport and leaf water use efficiency was suggested These ecophysiological differences may have an impact on the performance of the species occupying contrasting habitats Nonetheless, drought-induced embolisms occurred in trees growing in both open and forest habitats Overall, during drought, adjustment of leaf area occurred in order to maintain a homeostasis of some physiological traits (leaf-specific conductivity and carbon assimilation)

34 citations


Authors

Showing all 5925 results

NameH-indexPapersCitations
Franco Nori114111763808
Ignacio Rodriguez-Iturbe9633432283
Ian W. Hamley7846925800
Francisco Zaera7343219907
Thomas G. Habetler7339520725
Douglas L. Jones7051221596
I. Taboada6634613528
Enrique Herrero6424211653
Rudi Studer6026819876
Alejandro J. Müller5842012410
David Padua5824311155
Rudolf Jaffé5818210268
Luis Balicas5732814114
Volker Abetz5538611583
Ananias A. Escalante511608866
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Performance
Metrics
No. of papers from the Institution in previous years
YearPapers
20232
202220
2021286
2020384
2019340
2018312