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Sample records for caribe pinus caribaea

  1. Mejoramiento genético de Pinus caribaea

    OpenAIRE

    Barrett, Wilfredo H.

    1987-01-01

    El pino del Caribe (Pinus caribaea) fue elegido para esta propuesta de mejoramiento por ser una especie tro pical de crecim iento rápido que produce una madera apta para aserrado y debobinado como también utilizable para la industria celulósica papelera. En regiones tropicales del mundo y también en el país, ha obtenido un crecimiento que puede duplicar el de otras especies de pinos explotadas comercialmente. En sitios cálidos puece reemplazar con ventaja a Pinus e llio ttii y P. ta...

  2. Growth and provenance variation of Pinus caribaea var ...

    African Journals Online (AJOL)

    CAMCORE has visited 33 populations of Pinus caribaea var. hondurensis in Belize, Guatemala, Honduras, El Salvador, Nicaragua, and Quintana Roo, Mexico. Seed collections have been made in 29 provenances from 1, 325 mother trees. A total of 21 provenances and sources of Pinus caribaea var. hondurensis were ...

  3. Survival prognosis in plantations of Pinus caribaea Morelet var. caribaea Barrett & Golfari

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    Ouorou Ganni Mariel Guera

    2018-01-01

    Full Text Available The present study was carried out with the objective of obtaining regression equations and Artificial Neural Networks (ANNs for the prognosis of Pinus caribaea var. caribaea survival in Macurije Forest Company, province of Pinar del Río - Cuba. The data used in the modeling comes from the measurement of the variables age (years and survival (density in circular permanent plots of 500 m² established in P. caribaea var. caribaea plantations. The study was divided into three stages: i Adjustment of survival traditional regression models; ii Training of ANNs for survival prognosis, including categorical variables «site» and «Basic Units of Forest Production»; iii Comparison of regression equations performance with those of ANNs in survival prognosis. The best models and ANNs were selected based on: adjusted determination coefficient - R2aj (%, square root of the mean square error - RMSE (% and residue distribution analysis. The evaluation of the models goodness of fit also included the verification of the assumptions of normality, homocedasticity and absence of serial autocorrelation in the residues by Kolmogorov-Smirnov, White and Durbin-Watson tests, respectively. The model of Pienaar and Shiver (1981 turned out to be the best fit in survival prognosis. The ANN MLP 13-10-1 was the one with the best generalization capacity and presented a performance similar to that of Pienaar and Shiver equation.

  4. The flexural properties of young Pinus elliottii × Pinus caribaea var ...

    African Journals Online (AJOL)

    The objectives of this study were to determine the bending strength and stiffness properties of young Pinus elliottii × P. caribaea var. hondurensis timber from the Southern Cape, South Africa, and to evaluate the predictability of these properties from acoustic measurements on standing trees, logs and their sawn boards.

  5. Growth and Site Relationships of Pinus caribaea Across the Caribbean Basin

    Science.gov (United States)

    Leon H. Liegel; [Compiler

    1991-01-01

    Summarizes results of growth, volume, basal area, and stand conditions for Pinus caribaea var. hondurensis in five countries. Past pine management practices are reviewed for all countries. Implications of new forestry and soils research are discussed in terms of their impact on future local reforestation and afforestation...

  6. Aqueous extract of Pinus caribaea inhibits the damage induced by ultraviolet radiations, in plasmid DNA

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    Marioly Vernhes Tamayo

    2017-08-01

    Full Text Available Context: The incidence of solar ultraviolet radiation (UV on Earth has increased due to diminish of the ozone layer. This enviromental agent is highly genotoxic causing numerous damage in DNA molecule. Nowadays there is a growing interest in the search of compounds capable to minimize these effects. In particular, phytocompounds have been tested as excelent candidates for their antigenotoxic properties. Aims: To evaluate the protective effect of the aqueous extract of Pinus caribaea (EPC against the damage induced by the UVB and UVC radiation. Methods: The cell-free plasmid DNA assay was employed. The forms of plasmid were separated electrophoretically in agarose gel. For genotoxic and photoprotective evaluation of P. caribaea, different concentrations of the extract (0.1 – 2.0 mg/mL and exposure times were evaluated. The CPD lesions were detected enzymatically. Additionally, the transmittance of the aqueous extract against 254 nm and 312 nm was measured. Results: None of the concentrations were genotoxic in 30 min of treatment, for superior times a clastogenic effect was observed. The EPC despite inhibiting the activity of the enzyme T4 endo V, impedes photolesions formation in DNA at concentrations ≥ 0.1 mg/mL. Conclusions: The EPC has photoprotective properties, this effect could be related with its antioxidants and absorptives capacities.

  7. Wood properties of Eucalyptus grandis and Pinus caribaea estimated by colorimetry

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    Patrícia Gomes Ribeiro Amorim

    2013-09-01

    Full Text Available The use of non-destructive technologies has been very effective in characterization and evaluation of wood quality. This study aimed to characterize the technologically wood of Pinus caribaea and Eucalyptus grandis by Colorimetry. The study was conducted at the University of Brasilia (UNB in Physics and Engineering Laboratory the Laboratory of Forest Products/LPF - Brazilian Forest Service (SFB. Species were subjected to standard tests of basic density, shrinkage and bending. For the colorimetric determination of the parameters it was used a spectrophotometer according to the methodology adopted by Camargos (1999. The radial surface of the wood is most suitable for the collecting of the colorimetric parameters and prediction of properties. Property best estimated by this technique was the density, followed by modulus of elasticity (MOE and modulus of rupture (MOR.

  8. Determinación de vitamina (a -Tocoferol en Pinus Caribaea Morelet y Eucalyptus SP.

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    Clara Bécquer Romagosa

    1996-08-01

    Full Text Available Se presenta un método rápido de cromatografía de capa delgada para la determinación cualitativa y cuantitativa de vitamina E (a -tocoferol en muestras de Pinus caribaea Morelet y Eucaliptus sp. Los extractos etereos se cromatografiaron en placas preelaboradas con silicagel, para lo cual se empleó cloroformo como fase móvil. La cuantificación se realizó por detección densitométrica de las manchas del compuesto mediante un sistema controlado por computadora en los modos de reflexión/absorbancia a una longitud de onda de 280 nm. Este trabajo constituye el primer reporte de la presencia de esta sustancia en Cuba, encontrándose la vitamina E en concentraciones de 177 y 2 400 mg/kg de droga seca en pino y eucalipto respectivamente.A fast methods of thin layer chromatography for the qualitative and quantitative determination of vitamine E (a -tocopherol in samples of Pinus caribaea Morelet and Eucalyptus sp. is presented. The ethereal extracts were chromatographied in plates preelaborated with silica gel, for which chloroform was used as a mobile phase. Quantification was carried out by densitometric detection of the compound stains, using a computer controlled system in the modes of reflexion absorbability at a wave longitude of 280 nm. This paper is the first report about the presence of this substance in Cuba. Vitamin E has been found in concentrations of 177 and 2 400 mg/kg of dry drug in pine and eucalyptus respectively.

  9. DINÂMICA DA REGENERAÇÃO NATURAL NO SUB-BOSQUE DE Pinus caribaea Morelet. var. caribaea NA RESERVA BIOLÓGICA DE SALTINHO, TAMANDARÉ - PE

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    Izabela Souza Lopes

    2016-01-01

    Full Text Available The study of the structure and dynamics of natural regeneration in the understory of plantations with exotic species, such as those of the genus Pinus , makes it possible to provide information to management, conservation and re-establishment of native species in a plant community. The aim of this study was to identify and quantify the dynamics of natural regeneration of woody tree species occurring in the understory of Pinus caribaea in Rebio of Saltinho, Pernambuco state, Brazil. Regenerating species were measured for 10 permanent plots, 1 x 50 m, and included individuals with circumference at the base to 30 cm from the ground (CAB 0, 30 m ≤ 15 cm and height of more than one meter. The height was classified in: Class 1, shrubby tree, individuals with height 1 ≤ H ≤ 2; Class 2 with 2 height 3 m and ≤ 15 cm CAP. Phytosociological parameters were calculated, the dynamics of the regeneration and the Shannon index (H ‘ and evenness (J ‘ by Pielou. Protium heptaphyllum had as many individuals and value of importance (VI and Miconia prasina the best frequency in the two surveys. How to index H ‘ of 3,32 nats. ind -1 (2007 went to 3,07 nats. ind -1 (2012, and the evenness of J ‘ of 0,85 to 0,62, and decrease for both the diversity and the distribution. The 2012 survey recorded 12,5% increase in the number of individuals, and the regenerating of 2007 had 48,31% mortality. With respect to the number of individuals and basal area, the percentage gains were greater than the losses. It is concluded that the ecological succession of understorey regeneration of the population studied, lies in positive modification, and the settlement of Pinus caribaea, is preventing the emergence of new individuals and species.

  10. A Floricaula/Leafy gene homolog is preferentially expressed in developing female cones of the tropical pine Pinus caribaea var. caribaea

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    Marcelo Carnier Dornelas

    2005-01-01

    Full Text Available In angiosperms, flower formation is controlled by meristem identity genes, one of which, FLORICAULA (FLO/LEAFY (LFY, plays a central role. It is not known if the formation of reproductive organs of pre-angiosperm species is similarly regulated. Here, we report the cloning of a conifer (Pinus caribaea var. caribaea FLO/LFY homolog, named PcLFY. This gene has a large C-terminal region of high similarity to angiosperm FLO/LFY orthologs and shorter regions of local similarity. In contrast to angiosperms, conifers have two divergent genes resembling LFY. Gymnosperm FLO/LFY proteins constitute a separate clade, that can be divided into two divergent groups. Phylogenetic analysis of deduced protein sequences has shown that PcLFY belongs to the LFY-like clade. Northern hybridization analysis has revealed that PcLFY is preferentially expressed in developing female cones but not in developing male cones. This expression pattern was confirmed by in situ hybridization and is consistent with the hypothesis of PcLFY being involved in the determination of the female cone identity. Additionally, mutant complementation experiments have shown that the expression of the PcLFY coding region, driven by the Arabidopsis LFY promoter, can confer the wild-type phenotype to lfy-26 transgenic mutants, suggesting that both gymnosperm and angiosperm LFY homologs share the same biological role.

  11. Cost optimization of the system of use of wood in natural forests de Pinus caribaea

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    Fidel Cándano Acosta

    2012-03-01

    Full Text Available The work was carried out in natural forests of Pinus caribaea in areas of the forest company “La Palma” in the province of Pinar del Río in Cuba. The objective of the investigation was to minimize the cost of harvesting by combining the costs of haulage and road and load patio densities. In addition, the study also takes into consideration the interaction of costs of transportation and the thickness and quality of the layer of gravel on the road. The results of the investigation have shown a significant increase in the spacing between roads and load patios with the decrease of US$0.45/m³. It was possible to improve the quality of the layer of gravel on the road without changing the construction costs significantly, which led to a cost reduction of US$1.01/m³. The overall cost considering the new system decreases in US$1.46/m³. Another significant contribution is made by decreasing the impact to the ecosystem once the reduction on road density may reach around 44% in comparison to the current density.

  12. Biodistribución y farmacocinética de Taninos de Pinus caribaea Morelet y Casuarina equisetifolia en ratones

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    Jorge Luis Santana Romero

    2002-08-01

    Full Text Available Se estudió la biodistribución y la farmacocinética de taninos condensados purificados y marcados radioisotópicamente, extraídos a partir de la corteza de las especies forestales Pinus caribaea Morelet var caribaea y Casuarina equisetifolia previa administración por vía oral y endovenosa, con el empleo de ratones como biomodelo. Los taninos estudiados, con una alta capacidad antioxidante y diferenciados por la propiedad de formar complejos con proteínas, presentaron una rápida biodistribución hacia los diferentes órganos y tejidos, con manifestaciones de un importante acúmulo en el estómago e intestinos. Los taninos de ambas especies describen una biodistribución que se ajusta a un modelo bicompartimental de distribución. Se reportan los parámetros farmacocinéticos como tiempo de residencia medio, aclaramiento total, área bajo la curva, biodisponibilidad e instante de tiempo en que ocurre la máxima incorporación a partir de las curvas del aclaramiento sanguíneo.Biodistribution and pharmacokinetics of radioisotope-labeled and purified condensed tannins from Pinus caribaea Morelet var caribaea and Casuarina equisetifolia barks were studied after they were orally and intravenously administered to mice which served as biomodels. The studied tannins, known as strong antioxidants and protein complex ligands, showed a rapid biodistribution into several organs and tissues. Accumulation of these substances in the stomach and intestines was significant. Tannins from both species described a biodistribution that adapted to a biocompartimental model of distribution. Pharmacokinetic parameters such as mean residence time, total clearance, area under the curve, bioavailability and the moment when the maximum incorporation occurs were estimated from the blood clearance curves.

  13. Gasificación con CO2 de carbonizados de aserrín de Pinus caribaea Morelet var. cariba

    OpenAIRE

    F. Márquez-Montesino; T. Cordero-Alcántara; J. Rodríguez-Mirasol; J. J. Rodríguez-Jiménez

    2004-01-01

    Dada la importancia del estudio de la reactividad de los carbones con el fin de estudiar su activación, se desarrolló la gasificación con CO2 de un carbón obtenido de aserrín de Pinus caribaea. Los ensayos termogravimétricos se realizaron en un sistema modular de CI Electronics, las temperaturas de gasificación escogidas fueron 750, 775, 800 y 825 °C. Para calcular los valores de reactividad normalizada, se determinó el área de superficie por adsorción de CO2 a 273 K, en un equipo Au...

  14. Regeneración natural de pino macho (Pinus caribaea Morelet var. caribaea Barret y Golfari para el incremento del índice de boscosidad en el macizo San Felipe-Los Joberos.

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    Pablo Antonio Cabrera Rodríguez

    2015-09-01

    Full Text Available Natural regeneration of pino macho (Pinus caribaea Morelet var. caribaea Barret and Golfari for increasing forest rate in the massive San Felipe-Los Joberos. In this paper the behavior of natural regeneration (RN of the male pine (Pinus caribaea Morelet var. caribaea Barret and Golfari is evaluated as an alternative reforestation of logged areas or affected by forest fires in the San Felipe-LosJoberos hills . For this, a study was conducted for four years (January 2009 to May 2013, in which the deposition of litter, number of seeds in the soil, number of trees / ha; height and mean diameter in the RN was determined, loading seed into the soil, and such as nearby trees isolated adult or adult plantations. Finally the costs incurred by way of planting and analyzed alternative management were evaluated. The results, therefore the number of plants as for its size, which makes it roughly equivalent to adjacent stands from plantations, indicate the effectiveness of this type of reforestation in the area. The economic advantages of natural regeneration on the plantation are shown, making it possible to develop strategies for management of the species in these conditions. Training decision-makers on environmental education is projected to mitigate the effect on forest cover or other environmental impacts while raising the culture for payment of services generated by forest vegetation.

  15. Tannins from barks of Pinus caribaea protect Escherichia coli cells against DNA damage induced by gamma-rays.

    Science.gov (United States)

    Fuentes, J L; Vernhe, M; Cuetara, E B; Sánchez-Lamar, A; Santana, J L; Llagostera, M

    2006-02-01

    This work was aimed to evaluate genotoxicity and antigenotoxicity activity against gamma-rays of a tannin fraction obtained from barks of Pinus caribaea, as well as to elucidate the antigenotoxic mechanisms involved in radioprotection by using different approaches as pre-, co- and post-irradiation cell treatments with plant extract. The tannin fraction was not genotoxic to Escherichia coli cells in experiments using different exposure times. This extract was antigenotoxic against gamma-rays when the cells were pre- or co-treated with this extracts, but not during post-irradiation treatments, suggesting a possibly antigenotoxic action through free radical scavenging mechanisms. The results are discussed in relation to the chemopreventive and therapeutic potential of the studied plant species.

  16. BIODIVERSIDAD VEGETAL ASOCIADA A PLANTACIONES FORESTALES DE Pinus caribaea MORELET Y Eucalyptus pellita F. MUELL ESTABLECIDAS EN VILLANUEVA, CASANARE, COLOMBIA PLANT BIODIVERSITY ASSOCIATED TO FOREST PLANTATIONS WITH Pinus caribaea MORELET AND Eucalyptus pellita F. MUELL. ESTABLISHED IN VILLANUEVA, CASANARE, COLOMBIA

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    Fernando Fernández Méndez

    2012-06-01

    Full Text Available Resumen. Se analizó en una plantación ubicada en el bosque húmedo tropical la posibilidad que tienen las especies nativas de formar un sotobosque bajo plantaciones de Pinus caribaea y Eucalyptus pellita. Se establecieron parcelas permanentes en las plantaciones por especie, edad y tratamiento silvicultural; parcelas similares se instauraron en bosque natural y sabana. Se registraron individuos clasificados por tamaño y hábito. Se determinaron 49 familias botánicas y 102 especies. La mayor y menor diversidad se presentó en el bosque natural y en la sabana con 53 y 18 especies, respectivamente. Entre plantaciones, se encontró mayor diversidad en P. caribaea, con 46 especies, que en E. pellita con 38 especies. El cociente de mezcla indicó una vegetación heterogénea en todos los usos. Los índices Margalef y Menhinick mostraron que el bosque es más diverso, seguido de las plantaciones de mayor edad y por último la sabana. Los índices de Shannon y Simpson califican todos los sitios con vegetación heterogénea. Los tratamientos tuvieron diferencias estadísticas significativas en número de individuos, especies y categorías de tamaño, a excepción de las herbáceas. En cuanto a composición y abundancias se destacan tres grandes grupos: bosque con plantaciones maduras, plantaciones de edades intermedias y plantaciones jóvenes con sabana. Se observó una alta betadiversidad entre los tratamientos, que compartían menos del 50% de las especies y abundancias, según los índices Jaccard y Sorensen. Entre plantaciones se presentó el mayor número de especies compartidas. Se concluye que las plantaciones albergan buena cantidad de biodiversidad vegetal de sotoboque y no impiden el establecimiento de especies nativas.Abstract. It was analized in a plantation located in the tropical rainforest, the possibility that native species forming an understory in Pinus caribaea and Eucalyptus pellita plantations. Were established permanent plots

  17. Sustitución de la sabana nativa con plantaciones de Pinus caribaea (Pinaceae en Venezuela: efecto sobre parámetros indicadores de cambios en el carbono del suelo

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    Yrma Gómez

    2008-12-01

    Full Text Available Una gran extensión (615000 has de las sabanas nativas de los Llanos Orientales de Venezuela está siendo reemplazada por plantaciones de Pinus caribaea var. hondurensis; sin embargo, hasta ahora existe escasa información sobre el impacto de este manejo del suelo sobre los parámetros indicadores de la dinámica del carbono en el suelo. El objetivo de esta investigación fue determinar el efecto de la variabilidad temporal y la sustitución sobre el contenido de carbono orgánico total (COT, carbono hidrosoluble (CHS, carbono microbiano (Cmic, respiración basal (RB, cociente metabólico microbiano (qCO2 y la relación Cmic/Corg. Las propiedades químicas y parámetros biológicos seleccionados fueron determinados en plantaciones de P. caribaea de 3 y 29 años de edad y en una sabana nativa adyacente a estas plantaciones, la cual fue considerada como control. En cada sitio de muestreo recolectamos nueve muestras compuestas (0-10 cm de profundidad. Los parámetros estudiados no mostraron un patrón definido in relación a la variabilidad temporal. Hay mayor preservación del carbono dentro de la biomasa microbiana presente en suelos de Uverito en plantaciones de pinos. La tasa de respiración basal y el cociente metabólico indican que en estos suelos existe una comunidad microbiana poco activa, la cual es más eficiente en la utilización del carbono en las plantaciones de pino. La relación Cmic/Corg indica que en las plantaciones la biomasa microbiana constituye una importante reserva del carbono en el suelo. La sabana nativa a plantaciones de pino caribeño en estos suelos puede ser considerada un manejo efectivo para incrementar la calidad del suelo en los llanos orientales de Venezuela, siempre y cuando se tome en cuenta la importancia ecológica de las sabanas.Substitution of native savanna by Pinus caribaea (Pinaceae plantations in Venezuela: effect on parameters that indicated changes in soil carbon content. A great extension (615 000

  18. Carbon stored in forest plantations of Pinus caribaea, Cupressus lusitanica and Eucalyptus deglupta in Cachí Hydroelectric Project

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    Marylin Rojas

    2014-06-01

    Full Text Available Forest plantations are considered the main carbon sinks thought to reduce the impact of climate change. Regarding many species, however, there is a lack of information in order to establish metrics on accumulation of biomass and carbon, principally due to the level of difficulty and the cost of quantification through direct measurement and destructive sampling. In this research, it was evaluated carbon stocks of forest plantations near the dam of hydroelectric project Cachí, which belongs to Instituto Costarricense de Electricidad. 25 unit samples were evaluated along some plantations that contain three different species. 30 Pinus caribacea trees, 14 Cupressus lusitanica and 15 Eucalyptus deglupta were extracted. The biomass was quantified by means of the destructive method. First of all, every component of the tree was weighed separately; then, sampling was obtained in order to determine the dry matter and the carbon fraction. 110 biomass samples from the three species were analyzed in laboratory, including all the components (leaves, branches, shaft, and root. The carbon fraction varied between 47,5 and 48,0 for Pinus caribacea; between 32,6 and 52,7 for Cupressus lusitanica, and beween 36,4 and 50,3% for Eucalyptus deglupta. The stored carbon was 230, 123, and 69 Mg ha-1 in plantations of P. caribaea, C. lusitanica and E. deglupta, respectively. Approximately, 75% of the stored carbon was detected in the shaft.

  19. Classification of Pinus patula, P. tecunumanii, P. oocarpa, P. caribaea var. hondurensis, and Related Taxonomic Entities

    Science.gov (United States)

    A.E. Squillace; Jesse P. Perry

    1992-01-01

    Stem xylem terpenes of 75 pine populations were studied to determine relationships among taxonomic entities. Typical Pinus patula populations occurring in areas north and west of Oaxaca, Mexico, had very high proportions of 3-phellandrene and low proportions of other constituents. Terpene compositions of populations of variety longipeduncalatain...

  20. Gasificación con CO2 de carbonizados de aserrín de Pinus caribaea Morelet var. cariba

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    F. Márquez-Montesino

    2004-01-01

    Full Text Available Dada la importancia del estudio de la reactividad de los carbones con el fin de estudiar su activación, se desarrolló la gasificación con CO2 de un carbón obtenido de aserrín de Pinus caribaea. Los ensayos termogravimétricos se realizaron en un sistema modular de CI Electronics, las temperaturas de gasificación escogidas fueron 750, 775, 800 y 825 °C. Para calcular los valores de reactividad normalizada, se determinó el área de superficie por adsorción de CO2 a 273 K, en un equipo Autosorb-1 de Quantachrome Corporation sobre muestras desgasificadas a 180 °C y un vacío igual o mayor de 50 mtorr durante 8 h. De la gasificación con CO2 se representó gráficamente la reactividad frente a valores de conversión del carbonizado, indicando un aumento de la reactividad con el aumento de la temperatura de gasificación, lo que se explica por el desarrollo del área de superficie con el avance de la reacción y el efecto catalítico del mineral al aumentar su concentración en el sustrato. La representación gráfica de la ecuación de Arrhenius para la reactividad, indica que en las condiciones estudiadas en termobalanza, el proceso de gasificación ocurre bajo control de la etapa química, donde el valor de la energía de activación aparente es de ± 234 kJ/mol.

  1. Alternatives for composting Caribbean Pine sawdust (Pinus caribaea in the wood industry Refocosta S. A., in the municipality of Villanueva, Casanare, Colombia

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    Mónica Bibiana Sarmiento Oviedo

    2011-10-01

    Full Text Available Given the day-to-day accumulation of sawdust, a byproduct of the milling process of the Pinus caribaea species in the Wood industry of Refocosta, a composting process was tested in three treatments with different nitrogen sources (urea, industrial palm oil sludge, cattle dung and it was compared with composted pine bark and sawdust exposed to the weather. To assess possible inhibition of the substrates, the fresh biomass and germination of Zea maize and Acacia mangium was measured. Seedlings of Pinus caribaea, eucalyptus Pellita and Acacia Mangium were transplanted, and two months later the stem length, strength and survival were assessed. There were differences between maize and Acacia mangium and a lower germination and biomass in the substrates, sawdust and bark exposed to the weather and without composting were observed. The vigor and stem length were significantly better in composted bark, substrate which is currently used in the vivarium of Refocosta to produce seedlings; the sawdust-based substrates showed marked deficits (red colors, necrosis and stunting.

  2. Tannins extracted starting from residual bark of pinus caribaea morelet like protective of the adn before the damage induced by gamma rays a cellular cultivation of escherichia coli

    International Nuclear Information System (INIS)

    Vernhe, M.; Fuentes, J.L.; Prieto, E.F.; Cuetara, E.B.; Sanchez Lamar, A.; Santana, J.L.

    2005-01-01

    This work was aimed to evaluate genotoxicity and anti genotoxicity activity against rays of the a tannins fraction obtained from barks of Pinus caribaea Morelet, as well as to elucidate the anti genotoxic mechanisms implicated in radioprotection using deferent's approaches as pre- co- and post-irradiation cell treatments with plant extract. The tannins fraction was not genotoxic to E. coli cells in experiments using different exposure times. This extract was anti genotoxic against rays when the cells were pre- or co-treated with this extracts, but not during post-irradiation treatments, suggesting a possibly anti genotoxic action through free radicals scavenging mechanisms. The results are discussed in relation to the chemo preventive and therapeutic potential of the studied plant species

  3. Contenido del aceite esencial en el follaje de Pinus Caribaea morelet en función de la edad del árbol. II

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    Rolando Quert Álvarez

    2000-08-01

    Full Text Available Se presentan los resultados obtenidos en la cuantificación del contenido de aceite esencial de la especie Pinus caribaea Morelet endémica de Cuba, en función de la edad del árbol. El estudio se realizó con árboles existentes en áreas de la Estación Experimental Forestal de Viñales, provincia de Pinar del Río, con edades de entre 8-30 a. El tamaño de muestra fue de 3 árboles y el tiempo de destilación para la extracción del aceite esencial de 3 h. Los resultados obtenidos demostraron que el contenido de aceite esencial varía significativamente con la edad del árbol en forma ascendente, con el valor más bajo (0,12 % en peso a los 8 a y el más alto (0,27 % en peso a los 30 a.The results obtained in the quantitation of the content of essential oil of the Pinus caribaea Morelet, an endemic species from Cuba, according to the age of the tree, are presented. The study was conducted with trees existing in the areas of the Experimental Forestal Station in Viñales, province of Pinar del Río, at ages 8-30. The size of the sample was of 3 trees and the distillation time for the extraction of essential oil was of 3 hours. The results obtained showed that the content of esential oil increases significantly with age. The lowest value (0.12% in weight was registered at 8 and the highest (0,27% in weight at 30.

  4. Inhibición de la replicación del virus de inmunodeficiencia humana por extractos de taninos de Pinus caribaea Morelet

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    Ignacio Juan Ruibal Brunet

    2003-08-01

    Full Text Available Diferentes concentraciones de 6 extractos de corteza de Pinus caribaea Morelet var. caribaea se enfrentaron a 2 dosis de virus en un ensayo in vitro, sobre células MT4; la actividad antiviral se midió por ensayo inmunoenzimático de captura de proteína 24 del virus. Todas las fracciones mostraron actividad citotóxica moderada y solo una fue altamente tóxica. La fracción 02 mostró un alto porcentaje de inhibición de la replicación viral, en relación con la dosis viral y la concentración del producto, con un índice de selectividad de 100, pero son necesarios estudios adicionales sobre la identificación de la estructura química para definir el mecanismo de acción del producto.Six different fractions from the bark of Pinus caribae Moralet var. caribae were faced in five different concentrations against two viral doses (MOI 0,1 y 0,01 in a vitro assay on MT4 cell lines; the antiviral activity was measured by p24 Ag capture ELISA assay (DAVIH Agp24. All the fractions showed a mild cytotoxicity activity and only one fraction showed the highest cytotoxicity activity. The fraction 02 had the highest percentage of viral replication inhibition, correlated with the viral dose and the product concentration, having a selectivity rate of 100; however, more research about the chemical structure of active compounds, and possible mechanisms of action are needed.

  5. Provenance and family variation of Pinus caribaea var. hondurensis from Guatemala and Honduras, grown in Brazil, Colombia and Venezuela Variação em procedências e famílias de Pinus caribaea var. hondurensis da Guatemala e Honduras, testadas no Brasil, Colômbia e Venezuela

    Directory of Open Access Journals (Sweden)

    Vicente Pongitory Gifoni Moura

    2001-02-01

    Full Text Available Pinus caribaea var. hondurensis (Sénécl Barr. & Golf. is a tropical pine that naturally occurs in lowland areas of Belize, El Salvador, Guatemala, Honduras, Nicaragua, and eastern Mexico. It has been one of the most studied tropical pines and the one with the most commercial importance in Brazil. The objective of this work was to select the best provenances for plantations and best trees in families for the establishment of seed orchards. For that a trial with five provenances and 47 open-pollinated families was planted near Planaltina, Federal District, in the Cerrado Region of Brazil. The provenances tested were Poptun (Guatemala, Gualjoco, Los Limones, El Porvenir and Santa Cruz de Yojoa (Honduras and assessed at 12 years of age. Poptun and Gualjoco had larger volume, and Los Limones and El Porvenir the lowest incidence of forks and foxtails. Individual tree heritabilities for volume, stem form and branch diameter were 0.34, 0.06, and 0.26 respectively. More than 90% of the trees had defects, common in unimproved P. caribaea. Selection criteria for quality traits need to be relaxed in the first generation of breeding to allow for larger genetic gains in productivity. Results from this test compared with P. caribaea var. hondurensis trials in other Brazilian, Colombian and Venezuelan sites suggest that provenance x site and family x site interactions are not as strong as in other pine species.Pinus caribaea var. hondurensis (Sénécl Barr. & Golf. é uma espécie tropical que ocorre naturalmente nas terras baixas de Belize, El Salvador, Guatemala, Honduras, Nicarágua e no leste do México. Esta espécie tem sido uma das mais estudadas entre os pinos tropicais e uma das mais importantes comercialmente no centro e norte do Brasil. O objetivo deste trabalho foi selecionar as melhores procedências para plantios e também as melhores árvores dentro de famílias para o estabelecimento de pomares de semente. Para isso, um experimento com cinco

  6. AVALIAÇÃO DE ADESIVOS À BASE DE TANINOS DE Pinus caribaea var. bahamensis E DE Acacia mearnsii NA FABRICAÇÃO DE PAINÉIS AGLOMERADOS

    Directory of Open Access Journals (Sweden)

    Amélia Guimarães Carvalho

    2014-01-01

    Full Text Available This work aimed to evaluate the methods for extraction of tannin from the bark of Pinus caribaea var. bahamensis , as well as to evaluate the technical feasibility of using tannins from the barks of Pinus caribaea var. bahamensis , of Acacia mearnsii, the mixtures of black wattle and pine tannins and the mixture of adhesive urea formaldehyde (UF with black wattle and pine tannins in the production of adhesives for particleboard. The barks of Pinus caribaea var. bahamensis were fragmented in hammer mill, sieved and extracted under reflux for 2 hours, using a bark: liquor relation of 1:15, in nine treatments. The best extraction was used to obtain large quantities of extracts, which were used in the manufacture of adhesives and mixtures with UF adhesive and tannins of black wattle and the manufacture of particleboard. The addition of sodium sulfite gave higher extraction of tannin, which was extracted with the addition of 5% sodium sulfite. The results showed that both the black wattle tannin, as the bark of Pinus caribaea var. bahamensis have good bonding properties. It is possible to add pine tannin solution to the solution of black wattle and to replace part of the UF adhesive for the wattle tannins up to 25%, without compromising the glue quality. Replacing 10% of UF for tannic extract, both pine and black wattle, did not alter the values of thickness swelling (TS of the panels. It is possible to obtain good mechanical properties with UF adhesives modified with tannic extracts at a ratio of 10%. The high values found for the internal bond (IB panels containing tannin extracts showed the potential of these tannic extracts for bonding wood materials.

  7. Rendimiento de aceite esencial en Pinus caribaea MorElet según el secado al sol y a la sombra. III

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    Rolando Quert Álvarez

    2001-04-01

    Full Text Available Se presentan los resultados obtenidos en la determinación del rendimiento de aceite esencial Pinus caribaea Moralet (pino macho, en función de las condiciones y tiempo de exposición al sol y a la sombra del follaje de dicha especie endémica de Cuba. El estudio se realizó con árboles existentes en áreas de la Estación Experimental Forestal de Viñales, provincia de Pinar del Río con edad de 30 a. El tamaño de muestra fue de 3 árboles y el tiempo de destilación para la extracción del aceite esencial de 3 h. Se tomaron muestra del follaje entre 1 y 20 d expuesto a las condiciones de secado, en intervalos de 1, 3, 6, 10 y 20 d. Los resultados obtenidos demostraron que el follaje expuesto a la sombra contiene un mayor porcentaje de aceite esencial que el follaje expuesto al sol, y que el tiempo de exposición al sol, influye significativamente sobre el rendimiento a partir del tercer día, mientras que en el follaje expuesto a la sombra, las diferencias se hacen significativas a partir de los 6 d.The results obtained in the determination of the yield of the essential oil from Pinus caribaea Moralet (male pine according to the conditions and time of exposure to the sun and to the shade of the foliage of this Cuban endemic species are presented. Trees of 30 years old located in the areas of the Experimental Forestal Station of Viñales, Pinar del Río province, were used in the study. The size of the sample was of 3 trees and the time of distillation for the extraction of the essential oil was of 3 hours. Specimens of the foliage were taken at intervals of 1, 3, 6, 10 and 20 days. The results obtained showed that the foliage exposed to the shade has a higher percentage of essential oil that the foliage exposed to the sun, and that the time of exposure to the sun influences significantly on the yield starting from the third day on, whereas in the foliage exposed to the shade the differences are remarkable from the sixth day on.

  8. Produção de painéis compensados estruturais com diferentes composições de lâminas de Eucalyptus saligna e Pinus caribaea

    OpenAIRE

    Iwakiri,Setsuo; Matos,Jorge Luis Monteiro de; Ferreira,Erika da Silva; Prata,José Guilherme; Trianoski,Rosilani

    2012-01-01

    Este trabalho teve como objetivo avaliar a qualidade de painéis compensados estruturais produzidos com lâminas de Eucalyptus saligna e Pinus caribaea var. caribaea, var. hondurensis e var. bahamensis com diferentes composições de lâminas. Foram produzidos painéis experimentais com dimensões de 50 x 50 cm, utilizando-se cinco lâminas de 2,2 mm, com as seguintes composições: (1) painéis com todas as lâminas de mesma espécie/variedades (T1, T2, T3 e T4); e (2) painéis com lâminas de Eucalyptus s...

  9. Contenido del aceite esencial en el follaje de Pinus caribaea Morelet según la época del Año. I

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    Rolando Quert Álvarez

    1998-04-01

    Full Text Available Se realizó un estudio con el objetivo de determinar el contenido de aceite esencial en el follaje verde de la especie Pinus caribaea Morelet y cómo varía éste según los diferentes meses del año. Se determinaron el tiempo de destilación del aceite esencial a escala de laboratorio, el tamaño de muestra en nuestras condiciones de trabajo y el contenido de aceite esencial durante 2 años, mediante el análisis del contenido de aceite esencial de enero a diciembre. El tiempo de destilación obtenido fue de 3 h y el tamaño de muestra de 3 árboles. Los más altos rendimientos de aceite esencial se obtuvieron en los meses de marzo y abril y los más bajos entre noviembre y diciembre.A study was conducted aimed at determining the content of essential oil in the green foliage of the Pinus caribea Morelet species and at knowing how it varies according to the month of the year. The time of distillation of the essential oil at laboratory scale, the size of the sample under our working conditions, and the content of essential oil during two years were determined by analyzing the content of essential oil from January to December. The distillation time obtained was of 3 hours and the size of the sample was of 3 trees. The highest yields of essential oil were obtained in March and April, where as the lowest ones were attained between November and December.

  10. Soil properties and variability of tracheid dimensions and wood density in Pinus caribaea var. hondurensis Solo, dimensão dos traqueídeos e densidade da madeira em Pinus caribaea var. hondurensis

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    Robson Schaff Corrêa

    2011-06-01

    Full Text Available

    The understanding of wood quality in relation to different forest sites is of fundamental relevance in current timber market. There are only few studies available concerning soil and wood quality of tropical pinots. So, the goal of this work was to characterize tracheid dimensions and wood density of Pinus caribaea var. hondurensis, correlating these variables with soil properties at different sites. Discs were taken at 1.3 m height and comprised two radial samples in each of the four dominant trees removed at four different sites. Measurements for wood density were made from the third to the eleventh year old rings, and the measurement of tracheid dimensions were made in the fourth, eighth and eleventh year sold rings. The soil, collected in the canopy projection area of each tree was analyzed chemically and physically in different layers. The tracheid dimensions and wood density showed stabilization between the eighth and the eleventh years old rings. Moreover, the tracheid dimensions varied between sites and did not present a pattern of variation in relation to soil properties at the different sites.

    doi: 10.4336/2011.pfb.31.66.93

  1. Productivity and adaptation of Pinus in the north litoral of Bahia

    International Nuclear Information System (INIS)

    Barros Ferraz, E.S. de; Rezende, M.A.

    1986-01-01

    The productivity and climatic adaptation of two species of Pinus in the north litoral of Bahia State has been studied through the variability of wood density in a comercial plantation. The gamma-ray attenuation method of the 100 mCi 241-Am source, 59,6 KeV, was used for density variability analysis. The results show that Pinus caribaea hondurensis is better adapted to the region than Pinus caribaea caribaea, with a superior mean productivity of 26% at 8 years. (Author) [pt

  2. Variación de las Características Anatómicas y de la Densidad Básica de la Madera en Árboles de Pinus Caribaea Morelet Varo Hondurensis Barret y Golfari en Función del Espaciamiento de Plantación

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    Vásquez Correal Angela María

    1998-06-01

    Full Text Available Los objetivos del presente trabajo fueron analizar las variaciones de la estructura anatómica, de los anillos de crecimiento y de la densidad básica de la madera de árboles de Pinus caribaea var, hondurensis, en un experimento de espaciamientos con 17 años de edad, instalado en la Estación Experimental de Recursos Naturales Renovables de Anhembi-SP, ESALQ-USP, Sao Paulo-Brasil. En este experimento fueron muestreados un total de 35 árboles, comprendidos en 3 clases de diámetro (dominantes, intermedios y dominados y en 3 diferentes tratamientos de espaciamiento 3, 01,5; 3, 02,5 Y 3, 03,5m. En cada uno de estos árboles se determino el diámetro a la altura del pecho (DAP y la altura. Después del apeo de los individuos se colectaron discos de madera en los árboles de la clase de diámetro caracterizada como intermedia, en los 3 espaciamientos (12 árboles en total y a la altura del DAP. De estas muestras se obtuvo el material necesario para la evaluación de las dimensiones de las traqueídas en los leños inicial y tardío, en el sentido médula-corteza. También se analizó en las muestras de madera de todos los árboles, en los tres espaciamientos, el espesor de los anillos de crecimiento y de los leños inicial y tardío y la densidad básica de la madera en 5 submuestras obtenidas en el sentido médula-corteza. Se establecieron, a partir de estas evaluaciones, las relaciones entre las características de la madera de Pinus caribaea var. hondurensis y sus modelos de variación, en función de las diferentes clases de diámetro de los árboles, en los diferentes espaciamientos. De acuerdo con los resultados la variación de las dimensiones de las traqueídas en el sentido médula-corteza en la madera de Pinus caribaea var. hondurensis presentó, con relación a su largo, en lodos los tratamientos de espaciamiento y para los dos tipos de leño, un aumento de casi el doble del 3 ° hasta el 7° anillo de crecimiento, con un

  3. Biodegrading effects of some rot fungi on Pinus caribaea wood

    African Journals Online (AJOL)

    STORAGESEVER

    2008-05-16

    May 16, 2008 ... degradation was peculiar with each fungus. Wood decay varied along the tree bole but was not related to height above the ground. The results indicated that biodegradation by rot fungi differs in intensity according to the fungus species and this suggested that preservative impregnation and retention may.

  4. Growth performance of 5-year old Pinus caribaea var. hondurensis ...

    African Journals Online (AJOL)

    ACSS

    and climate data were not utilised in this study. MAI is an integrated index based on the sum result of site-specific ... programme (R Core Team, 2014). We used districts as fixed factors and plots as a random variable. .... inventory of permanent plots. MAB. Digest 11. UNESCO, Paris, France. Dupuy, B. and Mille, G. 1993.

  5. Tissue culture in Pinus caribaea Mor. var. Hondurensis barr. and ...

    African Journals Online (AJOL)

    SERVER

    2008-03-18

    Mar 18, 2008 ... and Harada (1979), L-glutamine is very important for somatic embryogenesis. They reached this conclusion after comparing the performance of individual amino acids in carrot cultures and they discovered that carrot somatic embryos were best promoted by L-glutamine. Secondly, the concentrations of the ...

  6. Variabilidad temporal de la abundancia de Coralliophila abbreviata y Coralliophila caribaea (Mollusca, Coralliophilidae en un arrecife coralino del Parque Nacional Morrocoy, Venezuela

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    Carlos del Mónaco

    2008-06-01

    Full Text Available C. abbreviata y C. caribaea son moluscos coralívoros del Mar Caribe. Evaluamos la variabilidad temporal de la abundancia y los cambios en la estructura de talla de C. abbreviata y C. caribaea en Cayo Sombrero, Venezuela (septiembre 2004-agosto 2005. Se colocaron transectas fijas de 50 metros de longitud a profundidades de tres y seis metros cada una, paralelas a la costa. Se evaluó mensualmente durante un año la densidad de ambos depredadores y se seleccionaron 30 individuos de C. abbreviata para medirlos cada mes. Las densidades de C. abbreviata en la transecta somera fluctuaron entre 1.78 ind/m² en septiembre y 6.26 ind/m² en mayo; las densidades de C. abbreviata en la transecta profunda estuvieron comprendidas entre 4.23 ind/m² en enero y 7.66 ind/m² en mayo. Las densidades de C. caribaea fluctuaron en la transecta somera entre 0 ind/m² (todos los meses menos septiembre y 0.03 ind/m² (septiembre mientras que la transecta profunda fluctuó entre 0 ind/m² (octubre a marzo y julio y 0.1 ind/m² (abril. La mayoría de los individuos de C. abbreviata midieron entre 12 y 16 mm de longitud. El largo de la mayoría de los individuos de C. caribaea estuvo comprendido entre 10 y 15 mm.Temporary abundance variation of Coralliophila abbreviata and Coralliophila caribaea (Mollusca, Coralliophilidae in a coral reef at Morrocoy National Park. The mollusks Coralliophila abbreviata and C. caribaea are coral predators in the Caribbean Sea . We evaluated the temporal variability of abundance and size structure of C. abbreviata and C. caribaea in Cayo Sombrero, Morrocoy National Park, Venezuelar (September 2004 - August 2005. The density of C. abbreviata and C. caribaea was evaluated monthly by means of two 50- meter long transects paralell to the coast line, at 3 m and 6 m deep; aditionally, 30 individuals of C. abbreviata were collected to measure size. The densities of C. abbreviata at the shallow transect fluctuated between 1.78 ind/m² in

  7. PRODUÇÃO DE CHAPAS DE MADEIRA COMPENSADA DE CINCO ESPÉCIES DE PINUS TROPICAIS

    Directory of Open Access Journals (Sweden)

    Setsuo Iwakiri

    2001-03-01

    Full Text Available Este trabalho teve como objetivo avaliar o potencial de utilização de 5 espécies de pinus tropicais para produção de painéis compensados. As espécies estudadas foram: Pinus caribaea, Pinus chiapensis, Pinus maximinoi, Pinus oocarpa, Pinus tecunumannii e Pinus taeda, sendo esta última espécie como testemunha. Foram produzidos compensados de 5 lâminas com resinas uréia-formaldeído e fenol-formaldeído. Os resultados de inchamento e recuperação em espessura foram estatisticamente iguais entre as espécies estudadas, com exceção para inchamento em espessura das chapas coladas com resina fenol-formaldeído. As chapas de Pinus maximinoi e Pinus oocarpa, apresentaram melhores resultados de módulos de elasticidade. Para o módulo de ruptura, as chapas de Pinus maxininoi, Pinus oocarpa e Pinus taeda, coladas com resina fenol-formaldeído, apresentaram valores estatisticamente superiores em relação às demais espécies. Quanto a resistência da linha de cola, as chapas de Pinus maximinoi, Pinus taeda e Pinus chiapensis, foram as que apresentaram melhor desempenho. Com base nos resultados gerais da pesquisa, pode-se destacar a potencialidade da madeira de Pinus maximinoi e Pinus oocarpa para produção de chapas de madeira compensada.

  8. Produção de chapas de madeira compensada de cinco espécies de pinus tropicais

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    Setsuo Iwakiri

    2001-01-01

    Full Text Available This research was developed aiming at evaluating the feasibility of the use of 5 species of tropical pine to plywood manufacture. The following species were studied: Pinus caribaea, Pinus chiapensis, Pinus maximinoi, Pinus oocarpa, Pinus tecunumannii and Pinus taeda, being the last used as the referential species. Plywood were manufactured with 5 plies, bonded with ureaformaldheyde and fenol-formaldheyde resin. The results of thickness sweeling and recovering were the same for all species studied, with exception to thickness sweeling for the boards glued with fenolformaldheyde resin. The boards made from Pinus maximinoi and Pinus oocarpa, showed the higher values in modulus of elasticity. The boards of Pinus maximinoi, Pinus oocarpa and Pinus taeda, glued with fenol-formaldheyde resin, resulted in higher values of the modulus of rupture, in comparison to other species. For the glue line strength, the boards of Pinus maximinoi, Pinus taeda and Pinus chiapensis, showed the better results. Based on the general results of this research it, could be said that the Pinus maximinoi and Pinus oocarpa present the high potentiality to plywood manufacture.

  9. Venezuela y el Caribe

    Directory of Open Access Journals (Sweden)

    Elsa Cardozo de da Silva

    1999-12-01

    Full Text Available Venezuela es uno de los principales actores económicos de América Latina, de allí la importancia de conocer las características de su política exterior. Los desarreglos de la política exterior hacia el caribe pueden ser resueltos si se les comprende en su dimensión local y global. En este sentido es necesario avanzar del espacio "inter-societal" de la preocupación estrictamente comercial a los espacios culturales y de cooperación técnica.

  10. Arcos con madera laminada del Pino Caribe Venezolano. Una propuesta para procesos de arquitectura ecosustentable - Arches with Venezuelan Caribbean Pine´S laminated wood. A proposal for eco-sustainable architecture processes

    Directory of Open Access Journals (Sweden)

    Rafael Gerardo Páez

    2017-07-01

    Full Text Available El principio generador de la madera laminada establece que piezas aserradas, débiles y pequeñas, al unirse con adhesivos artificiales, conforman elementos más grandes, con propiedades físico-mecánicas superiores a las de la misma especie maderable. En esta investigación se analiza la aplicación de la madera laminada del Pinus caribaea Morelet, var. hondurensis; cultivado en la Orinoquia venezolana, para fabricar sistemas estáticos curvos, dentro de procedimientos edificatorios en construcciones ecológicas y sustentables. El objetivo general propone definir un modelo estructural de arcos que simplifique las labores de producción, transporte, pre-ensamblado, montaje, aprovechamiento, transformabilidad, deconstrucción y reciclaje; que justifique los principios de desarrollo tecnológico ecosustentable basados en las innovaciones tecnológicas de la madera laminada de pino Caribe. La metodología empleada permitió analizar comparativamente y describir los predimensionamientos del peralte de distintos componentes estructurales portantes, que responden eficientemente a esfuerzos de flexo-compresión, configurados a partir de los diagramas de momentos flexionantes de vigas rectas simplemente apoyadas y empotradas y son geométricamente análogos a sistemas de arcos bi o triarticulados. Entre las conclusiones se determina que la arquitectura ecosustentable queda definida como el conjunto de medidas que aportan soluciones constructivas que no dañan el medio ambiente; que emplea, además, materiales naturales renovables, respeta los ecosistemas, construye sin desperdicios; que deconstruye y recicla, sin demoler ni generar escombros. Este artículo queda incluido en la línea de Investigación: Innovación Tecnológica como Proceso; sub-línea: Asimilación y Dominio Tecnológico; Postgrado de Gestión de Investigación y Desarrollo - Facultad de Ciencias Económicas y Sociales de la Universidad Central de Venezuela. Abstract The main

  11. Effect of plant growth regulators in the rooting of Pinus cuttings

    Directory of Open Access Journals (Sweden)

    Andréia Henrique

    2006-03-01

    Full Text Available This work evaluated the rooting of Pinus caribaea var. hondurensis Morelet cuttings under the action of different levels of plant growth regulators. The cuttings consisted of 4-6 cm long shoots of P. caribaea var. hondurensis Morelet with their basal needles removed. The basal part of the cuttings were treated for 2 seconds with the following treatments: 1- NAA 2000mg L-1; 2- NAA 4000mg L-1; 3- NAA 6000mg L-1; 4- NAA 2000mg L-1 + PBZ 100mg L-1; 5- NAA 4000mg L-1 + PBZ; 6- NAA 6000mg L-1 + PBZ; 7- IBA 2000mg L-1; 8- IBA 4000mg L-1; 9- IBA 6000mg L-1; 10-IBA 2000mg L-1 + PBZ; 11- IBA 4000mg L-1 + PBZ; 12- IBA 6000mg L-1 + PBZ; and a control. After receiving the treatment, the cuttings were planted in tubes containing 50% carbonized rice hulls and 50% vermiculite. The evaluations, performed 60 days after planting, showed that P. caribaea var. hondurensis cuttings treated with IBA produced a higher percentage of rooted cuttings than those treated with NAA; the most effective treatment was IBA 4000mg L-1 plus 100mg L-1 paclobutrazol.O trabalho avaliou o enraizamento de estacas de Pinus caribaea var. hondurensis Morelet sob a ação de diferentes níveis de reguladores vegetais. As estacas foram feitas de brotações de 4 a 6cm de comprimento de mudas de P. caribaea var. hondurensis Morelet com corte bisel na base sendo as acículas basais eliminadas. A base das estacas foram submetidas aos tratamentos por 2 segundos com os seguintes tratamentos: 1- NAA 2000mg L-1; 2- NAA 4000mg L-1; 3- NAA 6000mg L-1; 4- NAA 2000mg L-1 + PBZ 100mg L-1; 5- NAA 4000mg L-1 + PBZ; 6- NAA 6000mg L-1 + PBZ; 7- IBA 2000mg L-1; 8- IBA 4000mg L-1; 9- IBA 6000mg L-1; 10-IBA 2000mg L-1 + PBZ; 11- IBA 4000mg L-1 + PBZ; 12- IBA 6000mg L-1 + PBZ e testemunha. Após os tratamentos as estacas foram plantadas em tubetes contendo 50% de palha de arroz carbonizada e 50% de vermiculita. As avaliações realizadas aos 60 dias após o plantio mostraram que estacas de P. caribaea tratadas

  12. Repensando el Caribe: valoraciones sobre el gran Caribe hispano

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    Joaquín Santana Castillo

    2014-01-01

    Full Text Available Todo intento de estudiar las ideas y su evolución histórica en lo que hoy en día se denomina Caribe, exige siempre un esfuerzo adicional para el estudioso: el pensar y repensar el Caribe, debido a la diversidad de criterios y puntos de vista que existen sobre la región y los países que la integran. El problema no se hace menor cuando se reduce el referente al contexto del Caribe hispano, pues, en este caso, existe igualmente disparidad de opiniones. El presente estudio se propone explorar las diferentes interpretaciones existentes en la historiografía del concepto Caribe y determinar cuales son los elementos y factores comunes en la misma. Foco de atención principal es el Gran Caribe Hispano. Por tanto, lo que se tratará es en pensar y redefinir el Caribe.Palabras Clave: Caribe; Hispanoamérica; Historiografía; Pensamiento; Identidad y Cultura. Rethink the Caribbean: valuations on the great Hispanic CaribbeanAbstractAll attempt to study the ideas and their historical evolution in which nowadays we denominated the Caribbean, always demands an additional effort for the student: thinking and rethink the Caribbean, due to the diversity of criteria and country and points of view that exist on the region that integrate it. The problem is not made minor when the referring one to the context of the Hispanic Caribbean is reduced, then, in this case, also exists disparity of opinions. The present study sets out to explore the different existing interpretations in the historiography from the Caribbean concept and to determine as they are the elements and factors common in the same one. Main center of attention is the Great Hispanic Caribbean. Therefore, which will treat is in thinking and redefining the Caribbean.Keywords: The Caribbean; Hispano-America; Historiography; Thought; Identity and Culture. 

  13. Study of reproductive barriers in the production of P. elliottii x P. caribaea hybrid seed

    CSIR Research Space (South Africa)

    Sivlal, A

    2010-09-01

    Full Text Available Since its introduction, the P. elliottii (Pe) x P. caribaea var. hondurensis (Pch) hybrid has played a very important role in the plantation forestry industry due to its displayed improved growth, desirable wood properties (Du Plooy, 1984; Malan...

  14. La 'invención del caribe a partir de 1898 (las definiciones del caribe, revisitadas

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    Antonio Gaztambide

    2014-02-01

    Full Text Available En este trabajo se muestra que los conceptos de la historia están cargados de historicidad, cambios y transformaciones tal como lo demuestra el nombre Caribe. También se muestra quena existe una definición pura y exacta del, por esto el autor propone cuatro tendencias con las¡ que pudiera definirse este espacio insular. Estas tendencias son las siguientes: Caribe Insular o etno-, Caribe geopolítico, Gran Caribe o Cuenca del Caribe y Caribe cultural o Afro- América Central.

  15. Arcos con madera laminada del Pino Caribe Venezolano. Una propuesta para procesos de arquitectura ecosustentable - Arches with Venezuelan Caribbean Pine´S laminated wood. A proposal for eco-sustainable architecture processes

    OpenAIRE

    Rafael Gerardo Páez

    2017-01-01

    El principio generador de la madera laminada establece que piezas aserradas, débiles y pequeñas, al unirse con adhesivos artificiales, conforman elementos más grandes, con propiedades físico-mecánicas superiores a las de la misma especie maderable. En esta investigación se analiza la aplicación de la madera laminada del Pinus caribaea Morelet, var. hondurensis; cultivado en la Orinoquia venezolana, para fabricar sistemas estáticos curvos, dentro de procedimientos edificatorios en construccion...

  16. La vida en el pensamiento caribe

    Directory of Open Access Journals (Sweden)

    Francisco Avella

    2014-02-01

    Full Text Available Para llegar a una interpretación del pensamiento caribe se puede pensar en un breve recorrido histórico que resulta insuficiente a la hora de brindar a la polifonía del caribe contemporáneo. Se hace necesario, desde este escrito, aludir a la vida cotidiana del caribe que se ofrece como una amalgama de voces que se liberan más allá de los simples estamentos políticos que toma como referente la esclavitud.

  17. Literatura y antropologia: arawak y caribes

    Directory of Open Access Journals (Sweden)

    Patrick Bouletreau

    2014-02-01

    Full Text Available Los mitos caribes están estrechamente ligados al mar.  originario de las mesetas amazónicas del alto Brasil, ese pueblo emigro durante generaciones descendiendo en un primer momento a la amazonia para esparcirse sobre las costas de Guyana y de Venezuela.

  18. Eficiência dos herbicidas oxadiazil, oxadiazon, oxyfluorfen e Imazapyr sobre a cultura de pinus Efficiency of the oxadiazil, oxadiazon, oxyfluorfen and imazapyr herbicides on Pinus cropping

    Directory of Open Access Journals (Sweden)

    Wilson da Silva

    1999-08-01

    Full Text Available Avaliou-se a seletividade de alguns herbicidas para mudas de Pinus caribaea var. Hondurensis e suas eficiências no controle de plantas daninhas. As mudas com 20 cm de altura, produzidas em tubetes, foram transplantadas num espaçamento de 2,0 m x 2,0 m, em parcelas de quatro fileiras com 10,0 m de comprimento. Os tratamentos utilizados foram oxadiazil (600; 800 e 1000 g ha-1, oxadiazon (1140; 1520 e 1900 g ha-1, oxyfluorfen (720 g ha-1, imazapyr (250 g ha-1 e testemunhas (capinada e sem capina, dispostos em blocos ao acaso, com quatro repetições. Os herbicidas foram aplicados sete dias após o transplante, usando-se pulverizador costal, pressurizado com CO2, calibrado para 200 L ha- 1 de calda. As principais plantas daninhas com maior infestação foram: Brachiaria plantaginea e Ipomoea grandifolia e com menor infestação: Galinsoga parviflora e Bidens pilosa. O oxadiazil apresentou excelente controle de B. plantaginea, I. grandifolia e G. parviflora, não sendo eficiente para controle de B. pilosa, embora proporcionasse controle superior ao observado pelo oxadiazon. O oxadiazon foi eficiente até 45 dias após o tratamento para B. plantaginea, G. parviflora e até 90 dias para I. grandifolia. Tanto o oxyfluorfen quanto o imazapyr apresentaram excelente controle das plantas daninhas. De todos os herbicidas avaliados, apenas o imazapyr não deve ser recomendado para aplicação sobre o dossel de Pinus caribaea var. Hondurensis, em face da toxicidade provocada.The selectivity of some herbicides were evaluated on Pinus caribaea var. Hondurensis seedlings as well as these herbicide efficiencies in the weed control. When the tubule-produced seedlings were 20 cm height they were transplanted at 2,0 m x 2,0 m spacings in fourrows plots with 10,0 m length. The treatments with oxadiazil (600; 800 and 1000 g ha-1, oxadiazon (1140; 1520 and 1900 g ha-1, oxyfluorfen (720 g ha-1, imazpyr (250 g ha-1 and controls (weeded and without weeding were disposed

  19. Pinus sylvestris L.

    African Journals Online (AJOL)

    STORAGESEVER

    2009-09-01

    . Growth characters and number of strobili in clonal seed orchards of Pinus sylvestris. Euphytica, 152: 293-301. Bhumibhamon S (1978). Studies on Scots pine seed orchards in. Finland with special emphasis on the genetic ...

  20. Volumetric models for tropical pine in pure stand in Rondônia State, Brazil Modelos volumétricos para Pinus tropicais, em povoamento homogêneo, no Estado de Rondônia

    Directory of Open Access Journals (Sweden)

    Allan Libanio Pelissari

    2011-09-01

    Full Text Available

    This study aimed to adjust volumetric models to tropical pines, in pure stand, in the municipality of Vilhena, Rondonia State.  The data came from 20 felled trees of Pinus caribaea var.  hondurensis and 10 Pinus tecunumanii trees with discs collected at fixed positions of 0.20 m, 0.70 m, 1.30 m and in distances of one meter along the stem, for later counting and measurement of the growth rings at ages from 4 to 12 years. Eight volumetric models were adjusted. The selection criteria used were: standard error of estimate, adjusted coefficient of  determination, F test, significance of regression coefficients,  mean deviation, standard deviation of the differences, sum of square of the relative residual, percentage of the residuals and graphic analysis of residuals. The models from Näslund  modified and from Spurr presented, respectively, best fit to estimate the volume for Pinus caribaea var. hondurensis submitted to the first thinning and for Pinus tecunumanii, with  ages between 4 and 12 years, in Vilhena, Rondonia State, Brazil.

    doi: 10.4336/2011.pfb.31.67.173

    Este trabalho teve como objetivo ajustar modelos volumétricos para Pinus tropicais, em povoamento homogêneo, no Município  de Vilhena, RO. Para a coleta de dados, foram derrubadas 20  árvores de Pinus caribaea var. hondurensis e 10 de Pinus  tecunumanii, sendo coletados discos em posições fixas de 0,20  m; 0,70 m; 1,30 m e em distâncias de um metro ao longo do  fuste, para a posterior contagem e mensuração dos anéis de crescimento nas idades de 4 a 12 anos. Foram ajustados oito modelos volumétricos e o critério de seleção considerou os  resultados do erro padrão da estimativa, coeficiente de determinação ajustado, teste F, significância dos coeficientes de regressão, desvio médio, desvio-padrão das diferenças, soma de quadrados do resíduo relativo, resíduo percentual

  1. Biomass Burning observed during IAGOS - CARIBIC

    Science.gov (United States)

    Neumaier, Marco; Förster, Eric; Bönisch, Harald; Fischbeck, Garlich; Safadi, Layal; Hermann, Markus; Assmann, Denise; Zahn, Andreas

    2017-04-01

    Since May 2005 the CARIBIC passenger aircraft (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container - Lufthansa, Airbus 340-600) measures ˜100 trace gases and aerosol components in the UTLS (9-12 km altitude) on 4-6 consecutive long-distance flights per month. Volatile Organic Compounds (VOCs) are measured with a Proton-Transfer-Reaction Mass Spectrometer (PTR-MS). In 2017 the current instrument will be replaced by an improved version, similar to the one operated by our group onboard the HALO research aircraft. Worldwide ˜1.3 Tg/y of acetonitrile (CH3CN) is emitted into the atmosphere almost exclusively from biomass burning (BB) together with other VOCs (e.g. ketones, aldehydes, aromatics), CO, CO2, NOx and aerosol particles. Therefore, and due to its rather long tropospheric lifetime of ˜6 months, acetonitrile constitutes a reliable BB tracer. Based on the signal of acetonitrile and CO, we analyzed the IAGOS-CARIBIC data set with respect to signatures of BB. The most intense but relatively rare BB signals (up to ˜1200 pptV acetonitrile, i.e. ˜8 times the tropospheric background) were sampled ˜3 km above the thermal tropopause over North America and Greenland in boreal summer. However, the largest contribution of BB signatures (˜40%) was observed over the tropics in autumn and winter. In the tropics ECMWF back trajectory calculations show that the upward transport is driven by convection and we found hints for secondary O3 production in BB affected air masses leading to an enhancement of ˜25 ppb O3 relative to the tropospheric background. Based on our applied detection algorithm, ˜8% of the IAGOS-CARIBIC data were identified to be affected by BB.

  2. Pinus tropical com potencial para uso em plantios comerciais no Brasil. Tropical pine for commercial planting in Brazil.

    Directory of Open Access Journals (Sweden)

    Marcos Silveira WREGE

    2014-06-01

    Full Text Available Entre os pinus tropicais, Pinus caribaea var. hondurensis é uma variedade natural, oriunda de região com clima tropical na América Central. A espécie se aclimatou bem em várias partes do mundo, em regiões com alta pluviosidade e temperaturas elevadas. Embora não tolere geadas severas, pode ser plantada em partes da região Sul do Brasil onde o clima é mais quente e a frequência de geadas é menor e é indicado para plantio em boa parte do Brasil, em mais de 3,5 milhões de km2 . Essa é uma variedade que apresenta alto rendimento em madeira de boa qualidade, além de possibilitar a exploração da resina. Neste trabalho, são apresentadas as regiões no Brasil que apresentam potencial para cultivo dessa variedade em regime de silvicultura intensiva, tomando como base sua região de origem no mundo. São indicadas para plantio comercial as zonas com os menores riscos de geada nos estados da região Sul, no Estado de São Paulo e nas demais regiões que oferecem condições climáticas favoráveis, principalmente de disponibilidade hídrica para o desenvolvimento dessa variedade de pinus. – Among tropical pines, Pinus caribaea var. hondurensis is a natural variation from the tropical regions of Central America. The species has adapted well in various parts of the world, in regions with high rainfall and high temperatures. Although intolerance to severe frosts, it can be grown in parts of southern Brazil, where the climate is hot, with infrequent frosts and even can be used for commercial planting in over 3.5 million square kilometers.This variety presents high yield in quality wood as well as resin. This work shows regions in Brazil where environmental conditions are favorable for commercial plantations with this variety, by making comparisons with the conditions in its origin. Climatic zones within the Southern Region, as well as in the state of São Paulo and elsewhere with the lowest risks of frost and plenty of water for the

  3. Pinus sylvestris L.

    African Journals Online (AJOL)

    STORAGESEVER

    2009-01-19

    Jan 19, 2009 ... 1548-1552. Bergmann F (1978). The allelic distribution at an acid phosphatase locus in Norway spruce (Picea abies) along climatic gradients. Theor. Appl. Gen. 52: 57-64. Bilgen BB, Kaya N (2007). Allozyme variations in six natural popula- tions of scots pine (Pinus sylvestris L.) in Turkey. Biologia, Volume ...

  4. Selectividad de presas de Coralliophila abbreviata y C. caribaea en arrecifes coralinos del Parque Nacional Morrocoy, Venezuela: una aproximación experimental Selectivity of preys of Coralliophila abbreviata and C. caribaea in coral reefs of the National Park Morrocoy, Venezuela: an experimental approximation

    Directory of Open Access Journals (Sweden)

    Carlos del Mónaco

    2010-01-01

    Full Text Available Se evaluó la selectividad de presas de Coralliophila abbreviata y C. caribaea en seis arrecifes coralinos del Parque Nacional Morrocoy (PNM, Venezuela, mediante métodos descriptivos y experimentales. Se estimó la abundancia y riqueza coralina, el número de Coralliophila spp. y su presa coralina mediante cuadratas aleatorias de 1 m² en tres sitios por cada arrecife . Se utilizaron ocho jaulas de exclusión de 1 m³ en cuyo interior se colocaron cinco colonias coralinas de diferentes especies, equidistantes a 10 individuos de C. abbreviata. Se observó una estrecha relación depredador-presa entre C. abbreviata y la hexacoralina Montastraea annularis, representando el 56,8% de todas las interacciones en todas las localidades, seguida por Diploria strigosa (19,3%, Agaricia agaricites (12,2%, Colpophyllia natans (4,6% y A. tenuifolia (3,1%. C. caribaea exhibió una mayor afinidad con el octocoral Erythropodium caribaeorum (42,6% y las hexacoralinas C. natans (24,1%, Montastraea faveolata (11,1%, Porites porites (7,4% y D. strigosa (11,1%. De igual forma, el experimento mostró mayor asociación de C. abbreviata con M. annularis 53,3%, seguida por C. natans (17,8%, A. tenuifolia y D. strigosa (11,1% cada una y A. agaricites (6,7%. Según estos resultados, C. abbreviata debería generar un mayor impacto que C. caribaea sobre el PNM debido a que sus presas más frecuentes están entre las principales formadoras de arrecife mientras que C. caribaea depredó mayormente a E. caribaeorum, la cual es competidora de hexacorales.Coralliophila abbreviata and C. caribaea are tropical gastropods of the Caribbean Sea. These gastropods have shown to be important corallivores. The objective of this work was to evaluate in situ the prey selectivity of C. abbreviata and C. caribaea in some coral reefs of Morrocoy National Park by means of experimental and descriptive methods. We used quadrats of 1 m² to estimate coral abundance and richness, number of

  5. Energy rating and productive of wood from reforestation of Eucalyptus and Pinus genetically improved in the state of Sao Paulo

    Energy Technology Data Exchange (ETDEWEB)

    Jammal Filho, Fawaz Ali; Bruder, Edson Marcelo; Rezende, Marcos Antonio de [UNESP, Botucatu, SP (Brazil)

    2010-07-01

    Full text: In recent years, wood consumption is increasing, and the need to increase the availability of commercial wood reforestation becomes essentially important. In the state of Sao Paulo a few species of Eucalyptus and Pinus have stood out for having high productivity and with updated technical genetic improvements to productivity can be increased to 60 %. The work has to evaluate the productivity and quality of wood provided with commercial reforestation species of Eucalyptus and Pinus genetically improved in the midwestern region of Sao Paulo. In this study we used six treatments: a seminal Eucalyptus grandis; two clones of Eucalyptus grandis, three hybrid clones of Eucalyptus urophylla x Eucalyptus grandis. Pinus were analyzed for five hybrid progenies of Pinus caribaea var. hondurensis and Pinus tecunumanii. We evaluated the productivity rates of each treatment and the quality of wood produced, by studying their average density and specific variations possible by the methods: TARG (Technique attenuation of gamma radiation from {sup 241}Am) and immersion. Productivity mass IMAM treatments for Eucalyptus S1, C1, C2, H1, H2 and H3 were 18.7, 17.0, 21.2, 28.1, 30.1 and 27.2 ton/ha.years respectively, and the density point to 12 % treatments S1, C1, C2, H1, H2 and H3 were 451.3, 439.0, 411.9, 518.8, 526.4 and 526.3 kg/m{sup 3}. Productivity for Pinus mass IMAM treatments H1, H2, H3, H4, H5 and S1 were 14.7, 13.5, 13.7, 14.8, 12.4 and 13.0 ton/ha.years respectively, and the density point to 12 % treatments H1, H2, H3, H4, H5 and S1 were 475, 522, 459, 478, 430 and 514 kg/m{sup 3}. These results are extremely important and come to contradict some literature results that correlate productivity gains with losses in density. It was concluded that the values of density and productivity of each treatment and sperm Pinus hybrids there was significant improvement in the indices assessed. While in the Eucalyptus the results were remarkable, reflecting the improvement in

  6. Seguridad democrática y desarrollo en el Caribe

    OpenAIRE

    Rubén Sánchez David

    2003-01-01

    Este artículo explora la relación entre desarrollo y seguridad en el área del Caribe. La tesis está sustentada en la idea que la situación de cada sociedad y los retos que debe enfrentar llenan a los conceptos de contenido diferente. A partir de este planteamiento, el autor identifica las definiciones que rigen las políticas de seguridad democrática en el Caribe y en Colombia, así como sus intentos de aplicación en el área.

  7. Seguridad democrática y desarrollo en el Caribe

    Directory of Open Access Journals (Sweden)

    Rubén Sánchez David

    2004-01-01

    Full Text Available Este artículo explora la relación entre desarrollo y seguridad en el área del Caribe. La tesis está sustentada en la idea que la situación de cada sociedad y los retos que debe enfrentar llenan a los conceptos de contenido diferente. A partir de este planteamiento, el autor identifica las definiciones que rigen las políticas de seguridad democrática en el Caribe y en Colombia, así como sus intentos de aplicación en el área.

  8. Seguridad democrática y desarrollo en el Caribe

    Directory of Open Access Journals (Sweden)

    Rubén Sánchez David

    2003-01-01

    Full Text Available Este artículo explora la relación entre desarrollo y seguridad en el área del Caribe. La tesis está sustentada en la idea que la situación de cada sociedad y los retos que debe enfrentar llenan los conceptos de contenido diferente. A partir de este planteamiento, el autor identifica las definiciones que rigen las políticas de seguridad democrática en el Caribe y en Colombia, así como sus intentos de aplicación en el área.

  9. Seasonal monoterpene and sesquiterpene emissions from Pinus taeda and Pinus virginiana

    Science.gov (United States)

    Seasonal volatile organic compound emission data from loblolly pine (Pinus taeda) and Virginia pine (Pinus virginiana) were collected using branch enclosure techniques in Central North Carolina, USA. Pinus taeda monoterpene emission rates were at least ten times higher than oxyge...

  10. Caribe Brasil: una relación en debate

    Directory of Open Access Journals (Sweden)

    Olga Cabrera

    2008-01-01

    Full Text Available La falta de vínculos entre los estudios de Brasil y el Caribe está enmarcada en la permanencia de los paradigmas nacionales y las relaciones entre los estados. Algunos conceptos comprensivos han sido utilizados para relacionar estos complejos espacios empíricos. Algunos enfatizan los procesos culturales, middle pasaje o cross cultural y la poética de la relación; otros proyectan relacionar el espacio, superando la visión geopolítica reducida al Mar Caribe, colocando el énfasis en el protagonismo de los afro-descendientes. En esa dirección podemos localizar las propuestas de Atlántico Negro y Conexiones AfroAtlánticas las cuales consideran la inclusión del Brasil.

  11. La esclavitud liberal. Liberalismo y abolicionismo en el Caribe hispano

    Directory of Open Access Journals (Sweden)

    Rafael Rojas

    2013-05-01

    Full Text Available Este ensayo prpone una reconstrucción de algunos debates fundamentales sobre la abolición de la esclavitud en el Caribe hispano, durante la primera mitad del siglo XIX. El punto de partida es la revolución haitiana y la polémica sobre la esclavitud durante las Cortes de Cádiz; el de llagada es la campaña abolicionista de los autonomistas y republicanos de Puerto Rico y Cuba en la década de 1860. El ensayo sostiene que así como en el mundo continental hispanoamericano la disputa por los derechos naturales del hombre, a mediados del siglo XIX, se traducía en términos del conflicto Estado-Iglesia en el Caribe colonial, en cambio, esa misma disputa pasaba por el problema de la trata y esclavitud.

  12. Capacidad antimitotica de extractos de esponjas marinas del Caribe colombiano

    OpenAIRE

    Mora-Christancho, J.; Zea, S.; Santos-Acevedo, M.; Newmark-Umbreit, F.

    2007-01-01

    La determinación de actividad antimitótica de extractos de organismos marinos genera expectativas para la obtención de sustancias con potencial anticancerígeno a partir de fuentes alternativas. Se evaluó la actividad antimitótica in vitro de extractos orgánicos crudos de 15 esponjas de la costa Caribe colombiana, en embriones del erizo de mar Lytechinus variegatus. El 80% de las especies (Spirastrella coccinea, Myrmekioderma rea, Iotrochota imminuta, Halichondria sp., Petromica ciocalyptoides...

  13. EL CARIBE MEXICANO: LA CONSTRUCCIÓN DE UNA FRONTERA

    Directory of Open Access Journals (Sweden)

    Alfredo C. Dachary

    2005-12-01

    Full Text Available En la actualidad, la palabra Caribe se asocia al ocio, al mágico mundo de las islas tropicales y con ello al placer; en síntesis, es un concepto geográfico que ha sido apropiado y transformado por una actividad moderna y de gran expansión: el turismo, haciendo de él lo que hoy se conoce como un icono. Pero esto no es un caso aislado de transformación de un concepto geográfico en un imaginario social, ya que la otra gran concentración de islas tropicales en el mundo y más específicamente en el Océano Pacífico, que casualmente es hoy el otro gran centro turístico mundial, Oceanía, también su nombre lleva a conceptos similares a los del Caribe. ¿Qué ocurrió con estos lugares? ¿Fueron siempre solamente espacios turísticos, o se construyeron en un tiempo relativamente largo como para borrar la otra visión que tenían los antiguos pobladores de los mismos?

  14. CARIBE WAVE/LANTEX Caribbean and Western Atlantic Tsunami Exercises

    Science.gov (United States)

    von Hillebrandt-Andrade, C.; Whitmore, P.; Aliaga, B.; Huerfano Moreno, V.

    2013-12-01

    Over 75 tsunamis have been documented in the Caribbean and Adjacent Regions over the past 500 years. While most have been generated by local earthquakes, distant generated tsunamis can also affect the region. For example, waves from the 1755 Lisbon earthquake and tsunami were observed in Cuba, Dominican Republic, British Virgin Islands, as well as Antigua, Martinique, Guadalupe and Barbados in the Lesser Antilles. Since 1500, at least 4484 people are reported to have perished in these killer waves. Although the tsunami generated by the 2010 Haiti earthquake claimed only a few lives, in the 1530 El Pilar, Venezuela; 1602 Port Royale, Jamaica; 1918 Puerto Rico; and 1946 Samaná, Dominican Republic tsunamis the death tolls ranged to over a thousand. Since then, there has been an explosive increase in residents, visitors, infrastructure, and economic activity along the coastlines, increasing the potential for human and economic loss. It has been estimated that on any day, upwards of more than 500,000 people could be in harm's way just along the beaches, with hundreds of thousands more working and living in the tsunamis hazard zones. Given the relative infrequency of tsunamis, exercises are a valuable tool to test communications, evaluate preparedness and raise awareness. Exercises in the Caribbean are conducted under the framework of the UNESCO IOC Intergovernmental Coordination Group for the Tsunami and other Coastal Hazards Warning System for the Caribbean and Adjacent Regions (CARIBE EWS) and the US National Tsunami Hazard Mitigation Program. On March 23, 2011, 34 countries and territories participated in the first CARIBE WAVE/LANTEX regional tsunami exercise, while in the second exercise on March 20, 2013 a total of 45 countries and territories participated. 481 organizations (almost 200 more than in 2011) also registered to receive the bulletins issued by the Pacific Tsunami Warning Center (PTWC), West Coast and Alaska Tsunami Warning Center and/or the Puerto Rico

  15. Protección social en salud en América latina y el Caribe ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    13 déc. 2010 ... Protección social en salud en América latina y el Caribe : Investigación y políticas. Couverture du livre Protección social en salud en América latina y el Caribe : Investigación y. Directeur(s) : Amparo Hernández Bello et Carmen Rico de Sotelo. Maison(s) d'édition : Editorial Pontificia Universidad Javeriana, ...

  16. Avaliação técnica e econômica do corte mecanizado de Pinus sp. com Harvester Technical and economical evaluation of automated cutting of Pinus sp. in with Harvester

    Directory of Open Access Journals (Sweden)

    Elizabeth Neire da Silva

    2010-08-01

    Full Text Available Neste trabalho foi avaliada a operação de corte mecanizado de Pinus caribaea hondurensis em sistema de toras curtas, utilizando-se o Harvester, no Município de Nova Ponte, MG, com base na produtividade e nos custos da atividade durante o estágio inicial de sua implantação (5 meses e considerando-se o uso múltiplo da madeira. Na avaliação técnica foram calculados: rendimento operacional, produtividade, disponibilidade mecânica e eficiência operacional, enquanto na avaliação econômica foram calculados os custos operacionais e os custos de produção. A maior produtividade média foi encontrada no mês 5, com 22,71 m³.he-1, mês que apresentou a segunda maior disponibilidade mecânica (95,59%. A maior eficiência operacional foi encontrada no mês 3, com 83,09%. O custo operacional total do período amostrado foi de R$115,03 por hora efetiva de trabalho. Os custos fixos corresponderam a 28,59% e os variáveis, a 62,31% dos custos totais. O custo de produção foi de R$5,99.m3-1 produzido. Concluiu-se que a produtividade aumentou quando o volume médio por árvore também aumentou, que a máquina possuía potencial de melhoria no seu funcionamento e que seu custo de produção estava dentro dos padrões esperados para este trabalho.The present study evaluated the operation of the automated cutting of Pinus caribaea hondurensis, in system cut-to-length used Harvester, in the municipal district of Nova Ponte, MG, with base in the productivity and costs of the activity during the initial apprenticeship of it's implantation (5 months, considering the multiple use of the wood. In the technical evaluation calculations were made: Operational income, productivity, mechanical readiness and operational efficiency, while in the economical evaluation it the operational cost and the production costs were calculated. The largest medium productivity was found for month 5 with 22.71m³.he-1, the month that presented the second largest mechanical

  17. Inter-relação da produtividade de madeira do pinus com atributos físico-químicos de um latossolo do cerrado brasileiro

    Directory of Open Access Journals (Sweden)

    Carlos Eduardo Madureira Barbosa

    2012-02-01

    Full Text Available Com relação aos atributos do solo, a produtividade de madeira do pinus varia substancialmente em função do pH, do teor de matéria orgânica e da resistência à penetração. No ano de 2007, no Município de Selvíria (MS foi analisada a produtividade de madeira do Pinus caribaea var. hondurensis, em função de alguns atributos físico-químicos de um Latossolo Vermelho Distrófico estabelecido num maciço florestal com 21 anos de idade. O objetivo foi selecionar, entre os atributos pesquisados do solo, aquele que melhor se apresentasse para explicar a variabilidade da produtividade de madeira. Para tanto, foi instalado um grid geoestatístico, para a coleta dos dados do solo e da planta, contendo 121 pontos amostrais, numa área de 3 ha do referido maciço. A produtividade de madeira variou diretamente com o pH do solo, tanto linear quanto espacialmente, com valores de 27,0-32,6 m³ ha-1 ano-1 e 3,9-4,4, respectivamente. Nos maiores, 32,6-36,9 m³ ha-1 ano-1 e 4,4-4,9. Dessa forma, o pH revelou ser um apreciável indicador da qualidade química do solo quando o objetivo foi estimar, linear e espacialmente, a produtividade de madeira da essência florestal pesquisada nas condições do Cerrado brasileiro do Sudeste do Estado do Mato Grosso do Sul.

  18. CARIBIC observations of short-lived halocarbons and carbonyl sulphide over Asia

    Science.gov (United States)

    Leedham, E.; Wisher, A.; Oram, D.; Baker, A. K.; Brenninkmeijer, C. A.

    2013-12-01

    The CARIBIC project (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container, www.caribic-atmospheric.com) aims to investigate the spatial and temporal distribution of a wide-range of compounds, including those of marine origin/influence, via ~monthly flights to collect in situ data and whole air samples aboard a commercial Lufthansa aircraft. CARIBIC measures up to an altitude of 12 km, allowing the influence of marine compounds on the upper troposphere/lower stratosphere (UTLS) to be explored. In particular, CARIBIC is a useful tool for exploring the impact of very short lived halocarbons (e.g. CH2Br2, CHBr3), whose impact on stratospheric ozone is dependent on convective uplift to the UTLS, a process which is not yet fully quantified. As part of the suite of CARIBIC measurements, whole air samples are analysed at the University of East Anglia (UEA) via gas chromatography mass spectrometry for carbonyl sulphide (OCS) and up to 40 halocarbons (accounting for virtually 100% of organic chlorine, bromine and iodine in the UTLS). Here we present an overview of short-lived halocarbons and OCS measured by CARIBIC. We focus on two regions of particular interest. (1) measurements made in 2012 over the tropical west Pacific to link with UEA measurements made during the SHIVA campaign. (2) measurements made during a collection of flights over India in 2008. Flights over India investigated the impact of monsoon circulation on the distribution of these compounds; for example, elevated concentrations of OCS were seen in CARIBIC samples taken over India during the summer monsoon (July - September). These flights, along with a wider range of flights over Asia (from Frankfurt to Guangzhou, Manila, Bangkok and Kuala Lumpur) can provide unique information on the influence of tropical convection and monsoon circulation on halocarbon and OCS transport within this region.

  19. Nota sobre la densidad y tasa de depredación de Coralliophila abbreviata y Coralliophila caribaea sobre colonias jóvenes de Acropora palmata en un arrecife deteriorado de Cayo Sombrero, Parque Nacional Morrocoy, Venezuela Note on density and predation rate of Coralliophila abbreviata and Coralliophila caribaea on juvenile colonies of Acropora palmata in a deteriorated coral reef of Cayo Sombrero, Morrocoy National Park, Venezuela

    Directory of Open Access Journals (Sweden)

    Carlos del Mónaco

    2011-01-01

    Full Text Available Los arrecifes del Parque Nacional Morrocoy (PNM se encuentran actualmente impactados. Posterior a la mortandad masiva ocurrida en 1996, ha habido indicios de recuperación de Acropora palmata. Este proceso podría ser retrasado por Coralliophila. Se observaron solamente tres colonias de A. palmata en todo un arrecife de Cayo Sombrero. En julio 2005 estas presentaron densidades de Coralliophila abbreviata de 4, 0 y 2 ind/col y de Coralliophila caribaea de 22, 14 y 0 ind/col y, en enero 2006 las densidades fueron: 8, 0 y 4 ind/col de C abbreviata y 22, 14 y 0 ind/col de C caribaea. En las tres colonias se observaron cuatro lesiones (dos de cada depredador. Hubo pérdida de tejido de 66,14 cm a 162,85 cm en las lesiones ocasionadas por C abbreviata, con tasa de depredación de 0,52 cm día-1 en una de ellas, mientras que en otra fue de 37,41 a 72,50 cm con tasa de depredación de 0,19 cm día-1 . Las lesiones generadas por C caribaea no cambiaron. Es probable que el efecto de Coralliophila afecte la recuperación de A. palmata en el PNM, considerando la alta densidad de depredadores y la escasa abundancia de este coral en este parque.The coral reefs of Morrocoy National Park are currently deteriorated. After the massive mortality of 1996, Acropora palmata has shown some signs of recovery, a process that could be hampered by Coralliophila. We observed only three colonies of A. palmata in an entire reef in Cayo Sombrero. In July 2005, these colonies registered Coralliophila abbreviata densities of 4, 0, and 2 ind/col and Coralliophila caribaea densities of 22, 14, and 0 ind/col; in January 2006, said densities were 8, 0, and 4 ind/col (C. abbreviaté and 22, 14, and 0 ind/col (C. caribaea. Four sites of damage (two per predator were observed in the three colonies. In one colony, C abbreviata caused a loss of tissue of 66.14 to 162.85 cm , indicating a predation rate of 0.52 cm² day-1. In the other colony, the damage ranged from 37.41 to 72.50 cm2

  20. Jangwa Pana, el Caribe y “Publish or Perish”

    Directory of Open Access Journals (Sweden)

    William Andrés Martínez-Dueñas

    2017-03-01

    Full Text Available La reconfiguración de la revista Jangwa Pana ha permitido que su propósito original aún se mantenga: ofrecer un espacio para crear aquello que muchos llaman caribe y que los que tengan algo que decir, lo puedan decir, siempre y cuando se sometan al proceso editorial. Desde la lógica del “publish or perish”, la revista posee una dinámica de citación que hace que mantengamos el compromiso de seguirla editando, tratando de hacernos un espacio en la lógica de las políticas transnacionales de la publicación científica que hemos asumido sin cuestionamiento alguno. Finalmente, y quizá lo más importante, es que podemos decir que Jangwa Pana es una revista que se consolida como una publicación centrada en temas inter y transdisciplinarios con enfoque crítico desde las diferentes disciplinas de las Ciencias Sociales y las Humanidades.

  1. HERPETOFAUNA DE NEGUANJE, PARQUE NACIONAL NATURAL TAYRONA, CARIBE COLOMBIANO

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    jeiner jesus castellanos

    2010-01-01

    Full Text Available La herpetofauna del Parque Nacional Tayrona (Sector Neguanje fue estudiada durante 30 días entre los meses de septiembre y octubre del 2004 por medio del método de registros de encuentros visuales, la búsqueda activa y la disposición de barreras de intercepción con trampas de caída. Se registraron 44 especies, 11 de Anfibios y 33 de Reptiles, distribuidos en 18 familias y 37 géneros. Las curvas de acumulación de especie mostraron que aproximadamente 20 días son suficientes para registrar todas las especies de lagartos, situación inversa fue observada para las especies de ranas y serpientes. El lagarto Lepidoblepharis sanctaemartae fue la especie con mayor abundancia relativa registrada en el sector, lo que implica un buen criterio potencial para su protección. Se amplia la distribución local de la especie Colosthetus ruthveni, la cual era reportada solo para la Sierra Nevada de Santa Marta desde su descripción en 1997. Finalmente, este estudio revela que el sector Neguanje presentó el 33 % de la riqueza de especies registrada para la Sierra Nevada de Santa Marta, lo que posiciona ha esta zona como una de las más representativas en cuanto a biodiversidad en el Caribe Colombiano.

  2. La región Caribe y la hipótesis del retraso cultural

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    José Juan Amar Amar

    2003-01-01

    Full Text Available Este artículo es parte de un estudio que analiza la región Caribe a partir de la hipótesis de William Ogburn sobre el «retraso cultural». En él se describen las nuevas realidades y conceptos de región, el papel de la virtualidad en el desarrollo regional y el rol que juega el conocimiento en el futuro de la región Caribe. Posteriormente, basado en una taxonomía sociológica, el autor sustenta el conflicto de la sociedad del Caribe, generado por los procesos de modernización y la persistencia en el mantenimiento de formas y esquemas mentales propios de la sociedad tradicional, y se destaca el déficit significativo en la inversión en desarrollo humano.

  3. La culture musicale caribéenne de New York - 14

    OpenAIRE

    Audebert , Cédric

    2012-01-01

    Le bassin caribéen est un espace de production musicale foisonnante (reggae, salsa, konpa, meringue, zouk, calypso, etc.) au rayonnement international. Les musiques puisent leur énergie principalement dans l'héritage de la plantation et des quartiers populaires urbains des îles d'origine, mais aussi dans le cosmopolitisme des métropoles d'immigration. La mondialisation des musiques caribéennes s'appuie sur les puissants réseaux nord-américains de production et de diffusion, dont les communaut...

  4. Regeneration of Pinus cubensis Griseb. plants

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    Raima Cantillo Ardebol

    2011-01-01

    Full Text Available Micropropagation of plants from the genus Pinus has been done in several species. However, micropropagation of Pinus cubensis Griseb has not been reported. This species has a great economical importance. Then, the aim of the current research was to achieve in vitro propagation of Pinus cubensis Griseb. to increase the number of individuals in their natural habitat. The concentration of sodium hypochlorite and immersion time were determined for seeds disinfection and embryos establishment. The effect of the presence or absence of the seed coat was also studied. Two growth regulators and three concentrations of each one were tested to achieve the emission of axillary buds in the multiplication phase. Five subcultures every 21 days were done. Rooting and acclimatization were carried out simultaneously. Shoots were individualized and immersed in a rooting solution. Zygotic embryos of P. cubensis wer e dev el o ped in vitro. The highest percentages of disinfection and germination were obtained by introducing the seeds in a solution of sodium hypochlorite at 20% for 15 minutes, planting them after that without the seed coat. The number and length of axillary buds increased by using 22.5 µM of 6-benzylaminopurine and 5.4 µM naphthaleneacetic acid in the multiplication phase. The in vitro propagation of Pinus cubensis Griseb. from zygotic embryos was achieved for the first time. A protocol was also established, reaching 50% of survival in the acclimatization phase. Key words: acclimatization, axillary buds, forestry, multiplication, pinus

  5. Pinus taeda AND Pinus oocarpa PLYWOOD MANUFACTURING WITH FENOL-FORMALDHEYDE RESIN

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    Setsuo Iwakiri

    2002-01-01

    Full Text Available The objective of this study was to evaluate the quality of the plywood, manufactured from Pinus taeda and Pinus oocarpa, with 20 and 24 years old respectively, using three differentformulations of the fenol-formaldheyde resin. The results of the glue line shearing tests not showed statistical differences between the species and three resin formulations. In the hot water test, all of the boards were classified as “BR” and, the boards of the Pinus oocarpa produced with formulations (1and (3, were classified as “WBP”. The different resin formulations not influenced on the modulus ofelasticity (MOE and modulus of rupture (MOR The boards of Pinus taeda with formulations (1 and(2 showed higher values of MOE in comparison of the Pinus oocarpa. The MOR of the Pinus oocarpa withformulation (2 was higher than Pinus taeda. The mechanical properties of the plywood wereprobably influenced by wood variability related to sapwood and hartwood, thickness of growth ringsand, springwood and summerwood.

  6. Nación, Región y Fragmentación en el Caribe Contemporáneo

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    Emilio Pantojas García

    2011-01-01

    Full Text Available Históricamente lo nacional se ha privilegiado sobre lo regional en el Caribe y América Latina. Los proyectos de integración del Caribe y América Latina se han fundamentado en visiones regionalistas, tecnocráticas e ideológicas que asumen identidades, congruencias y afinidades que no concuerdan con la realidad de la visión nacionalista de las élites dominantes del continente latinoamericano y el archipiélago caribeño. El Caribe se constituyó como parte integral del primer gran proyecto occidental de globalización y fue el fulcro del surgimiento de los imperios europeos. El Caribe no fue un simple eslabón en las cadenas y circuitos globales de producción, intercambio y valor sino que ha sido parte constitutiva de éstas desde sus inicios. Las élites Caribeñas ven su dominio como parte de esta vinculación al mercado mundial. El proyecto neoliberal de globalización plantea un gran reto para el desarrollo de una identidad caribeña que desemboque en un proyecto político de integración regional.

  7. Músicas, cuerpos e identidades hibridas en el caribe: ¿cuál música, cuál cuerpo, cuál identidad, cuál caribe?

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    Lorena Aja

    2014-02-01

    Full Text Available En este artículo se presenta un panorama del Caribe en su identidad a partir de los artefactos culturales que engendran particularidades en su significación: la música y la danza. El cuerpo se retoma corno una amalgama de significados, de expresiones identitarias que devienen en la polifonía del ser caribe. En artículo se toma una postura conceptual sobre la identidad, la cultura y el caribe a partir de la experiencia personal del autor.

  8. Evaluation of the present genetic conservation efforts in Pinus sylvestris, Picea abies, Quercus spp., Fagus sylvatica, and Pinus pinaster

    NARCIS (Netherlands)

    Kramer, K.

    2015-01-01

    Information on genetic diversity and gene conservation activities were combined with climatic data to evaluate the present genetic conservation efforts in Pinus sylvestris, Picea abies, Quercus spp., Fagus sylvatica, and Pinus pinaster. Combinations of climatic variables explained much of the

  9. Results from six Pinus taeda nursery trials with the herbicide ...

    African Journals Online (AJOL)

    Pendimethalin is used by some nursery managers to control weeds in Eucalyptus and Pinus seedbeds and cutting beds of Pinus. Six trials were implemented in open-rooted seedbeds to test the response of Pinus taeda to postemergence (to the crop) applications of 2.2 kg ha–1 active ingredient of pendimethalin (the ...

  10. Hazardous Waste Cleanup: Caribe General Electric Product in Rio Piedras, Puerto Rico

    Science.gov (United States)

    The Caribe General Electric Product facility (GE Río Piedras) covers approximately 4 acres and is situated on the northern coastal plain in a relatively flat industrial/urban area of Río Piedras with an elevation between 20 and 40 feet above mean sea leve

  11. Hazardous Waste Cleanup: Puma Energy Caribe, LLC in Bayamon, Puerto Rico

    Science.gov (United States)

    Puma Energy Caribe LLC (Puma) is located in the Luchetti Industrial Park in Bayamón, Puerto Rico. The site is bounded to the west and southwest by industrial and commercial facilities, and to the south and east by Fort Buchanan, a U.S. military reservation

  12. Protección social en salud en América latina y el Caribe ...

    International Development Research Centre (IDRC) Digital Library (Canada)

    . Book cover Protección social en salud en América latina y el Caribe: Investigación y políticas. Directeur(s) : Amparo Hernández Bello and Carmen Rico de Sotelo. Maison(s) d'édition : Editorial Pontificia Universidad ...

  13. Demographic change and marriage choices in one Carib family.

    Science.gov (United States)

    Adams, K

    1994-03-01

    The demographic adaptation of a family of Topside Caribs along the Barama River in Guyana was studied. The family history included two grandfather and granddaughter marriages. Jack Raymond's father, who was born in 1870, left Bottomside after the death of his wife in the 1920s and settled above the falls of the Barama River (Topside in Sawari) with the hope of subsistence living off the rain forest. Information on the grandfather generation was made difficult by name changes, general references to all men in the second generation as grandfathers, and the focus on father's and mother's generation. The typical pattern was for brothers to live close by, and intermarry with a family of sisters. Female children married mother's brothers' sons or father's sisters sons. Their children formed their own cluster settlements. The early history indicated economic hardship, loss of wives, and difficulties in remarrying. The Baird chronicles of the reintroduction of gold mining and the ethnography of Gillin indicated that malaria and round worm were diseases affecting the indigenous population during the 1920s and 1930s. The Topside population was supported by the local gold-mining economy, while the Bottomside population suffered economic hardship and high infant mortality. In the Jack Raymond family, remarriage resulted in children marrying cross cousins. The younger daughter married in the 1940s, when subsistence production of cassava and hunting and gold-mining income provided the family's livelihood. The daughter had 10 surviving children, compared to her adoptive mother's two. For the daughter's generation, the first pregnancy occurred between the ages of 18 and 22 years, and birth spacing was 20-30 months for 25 years. Neither polygyny nor monogamy affected the potential for 12 children. In this Baramita Air Strip population in 1971, there were 62 mothers; reproductive histories were available for 59. The changes in reproductive patterns after 1940 were apparent: for

  14. Genetic transformation of Pinus palustris (longleaf pine)

    Science.gov (United States)

    Alex M. Diner

    1999-01-01

    Longleaf pine (Pinus palustris Mill.) is an important softwood species in the Southeast United States. In presettlement times, this species occupied extensive, pure stands throughout the Atlantic and Gulf Coastal Plains from southeastern Virginia to eastern Texas, as well as south...

  15. Ecosystem carbon stocks in Pinus palustris forests

    Science.gov (United States)

    Lisa Samuelson; Tom Stokes; John R. Butnor; Kurt H. Johnsen; Carlos A. Gonzalez-Benecke; Pete Anderson; Jason Jackson; Lorenzo Ferrari; Tim A. Martin; Wendell P. Cropper

    2014-01-01

    Longleaf pine (Pinus palustris Mill.) restoration in the southeastern United States offers opportunities for carbon (C) sequestration. Ecosystem C stocks are not well understood in longleaf pine forests, which are typically of low density and maintained by prescribed fire. The objectives of this research were to develop allometric equations for...

  16. Estudio sobre la influencia del contenido de humedad de la madera en ensayos no destructivos para Pinus nigra Arn, Pinus radiata D. Don y Pinus sylvestris L.

    OpenAIRE

    Calderón Arias, Luis

    2012-01-01

    El presente proyecto se centra en el estudio de la influencia que ejerce el contenido de humedad en la madera sobre mediciones realizadas mediante diversos ensayos no destructivos (NDT – Non Destructive Tests-). El objetivo es encontrar la relación entre el contenido de humedad de la madera de varias especies del género Pinus (Pinus nigra Arn, Pinus radiata D.Don. y Pinus sylvestris Ait.) y los resultados de diferentes NDT (penetrómetro, resistencia al arranque de tornillos y velocidad de pr...

  17. Los empresarios venezolanos y colombianos frente a la integración regional en la cuenca del Caribe

    OpenAIRE

    Giacalone Sangeti, Rita Ana

    1996-01-01

    La Cuenca del Caribe ocupa un lugar especial dentro de la agenda de la política exterior de Venezuela y Colombia. Para los gobiernos de ambas naciones existen razones geográficas, quizás económicas, pero fundamentalmente de orden político y de seguridad para interesarse en lo que sucede dentro de la Cuenca del Caribe. Instituto de Integración Latinoamericana

  18. Primer registro de Uraspis Secunda (Poey, 1860 (Pisces: Carangidae del Caribe colombiano Primer registro de Uraspis Secunda (Poey, 1860 (Pisces: Carangidae del Caribe colombiano

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    Acero P. Arturo

    1989-09-01

    Full Text Available Se registra la presencia del pez carángido Uraspis secunda en el Caribe colombiano a partir de ocho especímenes capturados en faenas de pesca de camarón al sur de Cartagena y otro proveniente del material de un pescador artesanal cerca de Santa Marta. Uraspis secunda is reported by the first time from the Colombian Caribbean, based on eight specimens fished by shrimp trawlers south of Cartagena, and another one captured by an artisanal fisherman near Santa Marta.

  19. Modeling natural regeneration biomass of Pinus stand

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    Rafael Cubas

    2016-09-01

    Full Text Available Reliable biomass data are very important in the evaluation of ecosystems, and help in understanding the contribution of forests in climate change. Variables that describe the size of the tree, like diameter and height are directly associated with biomass, which allows the use of regression models to estimate this element. Therefore, this study aimed to estimate by regression models, the biomass of different compartments of natural regeneration of trees of a Pinus taeda L. stand. The data were obtained through direct destructive method, using 100 randomly selected trees in the understory of a stand of Pinus taeda. We analyzed three arithmetical models, three logarithmic and two models developed by Stepwise process. Logarithmic equations developed by Stepwise procedure showed the best estimates of total and stems biomass. However, for needles and twigs compartments the best adjust was observed with Husch model and for root biomass Berkhout model proved to be the most suitable.

  20. Comparative mapping in Pinus: sugar pine (Pinus lambertiana Dougl.) and loblolly pine (Pinus taeda L.).Tree Genet Genomes 7:457-468

    Science.gov (United States)

    Kathleen D. Jermstad; Andrew J. Eckert; Jill L. Wegrzyn; Annette Delfino-Mix; Dean A Davis; Deems C. Burton; David B. Neale

    2011-01-01

    The majority of genomic research in conifers has been conducted in the Pinus subgenus Pinus mostly due to the high economic importance of the species within this taxon. Genetic maps have been constructed for several of these pines and comparative mapping analyses have consistently revealed notable synteny. In contrast,...

  1. Diversidad y microestructura de quitones (Mollusca: Polyplacophora del Caribe de Costa Rica

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    Cedar I García-Ríos

    2011-03-01

    Full Text Available Los poliplacóforos asociados a los arrecifes de coral en la costa caribeña de Costa Rica han sido poco estudiados. El examen del cascajo de coral acumulado en el sublitoral somero, en cuatro estaciones de colección, localizadas en la Provincia de Limón reveló una diversidad de quitones mayor a la documentada. Anteriormente se habían registrado ocho especies para el Caribe costaricense: Ischnochiton erythronotus (C.B. Adams, 1845; Ischnoplax pectinata (Sowerby 1840; Stenoplax boogii (Haddon, 1886; S. purpurascens (C.B. Adams, 1845; Acanthopleura granulata (Gmelin, 1791; Chiton marmoratus Gmelin, 1791; C. tuberculatus Linnaeus, 1758; Acanthochitona rhodea (Pilsbry, 1893. Otras cinco se registran aquí por primera vez: Callistochiton portobelensis Ferreira 1976; Ischnochiton kaasi Ferreira 1987; I. pseudovirgatus Kaas 1972; Acanthochitona balesae Abbott 1954; Cryptoconchus floridanus (Dall 1889.

  2. Mujer y medio ambiente en América Latina y el Caribe

    OpenAIRE

    Silva Ch., Paola; Alvarez, Susana; Cambría, Celeste; Sala, Mariella; de Ochoa, Regina; Corral, Thais; Olivera, Maria del Carmen; González, Nhelsyr; Solís, Vivienne; Rossato, Verónica; Pérez, Magdalena

    1991-01-01

    1. Mujer y medio ambiente en América Latina y el Caribe: los desafíos hacia el año 2.000. 2. Políticas de población vigentes en los países de América Latina y el Caribe. La mujer como protagonista del desarrollo sustentable. Política de población en Perú: la relación mujer y medio ambiente. Población, mujer y medio ambiente en Honduras. Medio ambiente y población: una visión crítica. 3. La mujer en el manejo de los recursos naturales y tecnologías apropiadas. Participación de la mujer campe...

  3. Sismicidad histórica e instrumental del Caribe de Costa Rica

    OpenAIRE

    Boschini, Ileana M.; Montero, Walter

    2011-01-01

    La Región Caribe de Costa Rica, usualmente, fue considerada por geólogos y sismólogos y en el Código Sísmico de Costa Rica como una zona de bajo potencial sísmico, especialmente para eventos con magnitudes mayores que 7,0. El terremoto del 22 de abril de 1991 ha demostrado lo contrario. Una revisión de la sismicidad histórica e instrumental de la región Caribe de Costa Rica y Panamá, muestra que esta región fue el marco de importantes eventos sísmicos durante los siglos XIX y XX. En particula...

  4. Foliar fungi of Scots pine (Pinus sylvestris)

    OpenAIRE

    Millberg, Hanna

    2015-01-01

    Scots pine (Pinus sylvestris) is an ecologically and economically important tree species in Fennoscandia. Scots pine needles host a variety of fungi, some with the potential to profoundly influence their host. These fungi can have beneficial or detrimental effects with important implications for both forest health and primary production. In this thesis, the foliar fungi of Scots pine needles were investigated with the aim of exploring spatial and temporal patterns, and development with needle...

  5. Reseña. Proyecto Caribe de comunicación, comercio y cultura.

    OpenAIRE

    Proyecto Caribe, Organización

    2017-01-01

    El proyecto Caribe es ina organización para el desarrollo que se dedica a la promoción de la producción material e inte¿lectual del sector afrocostarricense.Su trabajo consiste en promover intercambios culturales y comerciales, ubicar, sistematizar y centralizar mercancías e información del sector para beneficio de productores y consumidores.

  6. Intrusiones de polvo africano en la región Caribe de Colombia

    Directory of Open Access Journals (Sweden)

    Omar Javier Ramírez Hernández

    2015-02-01

    Full Text Available El transporte intercontinental de material mineral desde África hacia el Caribe, Norteamérica y Suramérica es un fenómeno de interés investigativo internacional. Varios estudios han llamado la atención sobre los efectos meteorológicos y las implicaciones climáticas derivadas de la presencia de este aerosol en la atmósfera, como también de los potenciales efectos sobre la salud humana. La región Caribe colombiana no es ajena a esta problemática, pero son escasos los estudios realizados. Por lo anterior, el objetivo de este artículo es identificar eventos de intrusión de polvo de origen africano en la región Caribe de Colombia. Metodológicamente se analizaron mapas de concentración de polvo generados por los modelos GEOS-5, SKIRON, NAAPS y CALIPSO, entre el 01 de enero y el 31 de diciembre de 2012. También se utilizaron imágenes generadas por el sensor satelital MODIS e información de redes de calidad del aire de la región. Según los resultados obtenidos, existen evidencias para afirmar que al norte de Colombia, en la región Caribe, se detectan eventos de intrusión de polvo de origen africano. El periodo del año en que se presentan mayores niveles de concentración es entre marzo y septiembre, sobresaliendo los meses de marzo, junio, julio y agosto.

  7. Species diversity and plastid dna haplotype distributions ofPinus Subsection Australes (pinaceae in Guerrero and Oaxaca

    Directory of Open Access Journals (Sweden)

    Alfredo Ortiz-Martínez

    2016-01-01

    Full Text Available Pinus subsección Australes es un grupo de pinos duros de América del Norte que comprende aproximadamente 29 especies de árboles importantes económicamente y ecológicamente distribuidos a lo largo de toda América del Norte y Central y las Islas Caribeñas. Estudios previos han mostrado que las especies de esta subsección a menudo comparten haplotipos de ADN de plastidio, un patrón que es atribuido a la hibridación introgresiva y la retención de polimorfismos ancestrales. Aquí describimos la diversidad de haplotipos de plastidio y la morfología para este grupo de especies en los estados de Guerrero y Oaxaca, México. Siete especies de Pinus subsección Australes son reconocidas en el área de estudio, una de las cuales, P. patulaincluye dos variedades. Siete sitios variables y nueve haplotipos fueron encontrados amplificando un fragmento de 840 p. b. de ADN de la región codificante ycf1. Se encontraron haplotipos compartidos para P. patulavar. patula, P. patula var. longipedunculata, P.herrerae y P. tecunumanii. Cuatro de los nueve haplotipos encontrados están restringidos a Oaxaca. Aunque las genealogías de genes son valiosas para estudiar la evolución de este grupo, se requieren mayor muestreo de individuos y más sitios variables para la inferencia de relaciones entre las especies.

  8. CARIBIC observations of gaseous mercury in the upper troposphere and lower stratosphere

    Directory of Open Access Journals (Sweden)

    Slemr F.

    2013-04-01

    Full Text Available A unique set of gaseous mercury measurements in the upper troposphere and lower stratosphere (UT/LS has been obtained during the monthly CARIBIC (www.caribic-atmospheric.com flights since May 2005. The passenger Airbus 340-600 of Lufthansa covered routes to the Far East, North America, India, and the southern hemisphere. The accompanying measurements of CO, O3, NOy, H2O, aerosols, halocarbons, hydrocarbons, greenhouse gases, and several other parameters as well as backward trajectories enable a detailed analysis of these measurements. Speciation tests have shown that the CARIBIC measurements represent a good approximation of total gaseous mercury (TGM concentrations. Above the tropopause TGM always decrease with increasing potential vorticity (PV and O3 which implies its conversion to particle bound mercury. The observation of the lowest TGM concentrations at the highest particle concentrations in the stratosphere provides further evidence for such conversion. We will show how a seasonally dependent conversion rate could be derived using concomitantly measured SF6 mixing ratios as a timer. Tropospheric mercury data suggest the existence of a decreasing trend in the northern hemisphere whose size is comparable with the trend derived from long-term measurements by ship cruises, at Cape Point (South Africa and Mace Head (Ireland.

  9. Structural features of the spermatozoon of a passeridan bird, the Carib grackle, Quiscalus lugubris.

    Science.gov (United States)

    Aire, Tom A; du Plessis, Lizette; Deokar, Mahesh S; Rennie, Eugene; Gupta, Sunil K

    2017-04-01

    The spermatozoon of the Carib grackle, Quiscalus lugubris, a member of the family Icteridae, is generally similar in organization to the passerine-type of spermatozoon, in being highly elongated and displaying a helical structure of the acrosome, nucleus and principal piece of the tail. There are subtle variations in acrosomal structural features between this organelle in the grackle and that in some of the very few passerine species of birds in which the spermatozoon has been studied. The proximal centriole is present, and, thus, the Carib grackle is the third passeridan bird in which this organelle, hitherto regarded as absent in passerine birds, has been described in the spermatozoon. The spermatozoon of this bird also possesses a granular helix, which feature has been found variably even in the scanty available reports on passerine spermatozoa. It is advocated that the spermatozoon be studied in many more species of this large clade of birds. This report provides a basis for the study of spermiogenesis in the Carib grackle, with the aim of exposing, inter alia, a number of developmental features and processes of certain organelles that have received attention, recently, in the spermatozoa of passerine birds. Copyright © 2017 Elsevier Ltd. All rights reserved.

  10. Estructura y distribución de los condrictios de aguas profundas en el Caribe colombiano

    Directory of Open Access Journals (Sweden)

    Jorge Paramo

    2015-09-01

    Full Text Available Si bien, aunque actualmente no existe una pesquería de aguas profundas en el Caribe colombiano, es importante conocer la biología y ecología de la ictiofauna de aguas profundas para identificar el impacto de la pesca sobre estas comunidades. Con fines de aportar conocimiento que sirva como línea base para su conservación, el objetivo del presente estudio fue determinar la composición específica, y aspectos de su estructura poblacional y ecológica tales como abundancia y distribución (espacial y batimétrica de los condrictios de aguas profundas en el mar Caribe colombiano. Se realizaron cuatro muestreos a bordo de un barco de arrastre camaronero entre 200 y 550 m de profundidad, durante agosto y diciembre de 2009 y, marzo y mayo de 2010. Se encontró un total de 331 especímenes de 13 especies correspondientes a nueve familias. Las especies que se capturaron con más de 15% de frecuencia de ocurrencia fueron Etmopterus perryi, Galeus cadenati, Anacanthobatis americanus y Gurgesiella atlantica. La zona donde se encontró la mayor abundancia relativa de especies e individuos fue el norte del Caribe colombiano, denominada Ecoregión La Guajira.

  11. Sociabilidades modernas: sociedades fraternales secretas en el Caribe costarricense a finales del siglo XIX

    Directory of Open Access Journals (Sweden)

    Ricardo Martínez Esquivel

    2009-01-01

    Full Text Available Puerto Limón en el caribe costarricense fue transformado en un espacio multicultural y de interacción étnica a finales del siglo XIX debido a su vinculación con el mercado internacional, la construcción del ferrocarril y al desarrollo de la industria bananera. A este puerto llegaron europeos de las más diversas procedencias, estadounidenses, latinoamericanos y afrodescendientes criollos del Caribe, quienes con sus distintos acervos culturales definieron costumbres, hábitos de consumo y formas de sociabilidad. La sociedad limonense para estos años adquirió una dinámica más liberal, progresista, modernista y cosmopolita, que muchas otras partes de Costa Rica. La situación anterior facilitó el establecimiento de sociedades fraternales secretas como la masonería y los Knights of Pythias, microespacios de sociabilidad donde cohesionaron personas de distintas culturas y procedencias. El estudio de este tipo de agrupaciones es una tarea todavía pendiente en el Caribe, por lo que esta investigación es un aporte.

  12. Growth and dynamic modulus of elasticity of Pinus patula × Pinus ...

    African Journals Online (AJOL)

    Field establishment of South Africa's most important commercial pine species, Pinus patula, is severely hampered by the pitch canker fungus, Fusarium circinatum. Importantly, hybrids between P. patula and other pine species tolerant to the pitch canker fungus, such as P. tecunumanii and P. oocarpa, have been identified ...

  13. Rust resistance in seedling families of Pinus albicaulis and Pinus strobiformis and implications for restoration

    Science.gov (United States)

    R. A. Sniezko; A. Kegley; R. Danchok; J. Hamlin; J. Hill; D. Conklin

    2011-01-01

    Infection and mortality levels from Cronartium ribicola, the fungus causing white pine blister rust, are very high in parts of the geographic range of Pinus albicaulis (whitebark pine) and P. strobiformis (Southwestern white pine). Genetic resistance to this non-native fungus will be one of the key factors in maintaining or restoring populations of these species in...

  14. Critical water stress levels in Pinus patula seedlings and their ...

    African Journals Online (AJOL)

    Critical water stress levels in Pinus patula seedlings and their relation to measures of seedling morphology. ... Southern Forests: a Journal of Forest Science ... A pot trial was implemented to determine the effect of soil water stress following transplanting on shoot water potential and stomatal conductance of Pinus patula ...

  15. Effect on nursery and field performance of Pinus patula seedlings ...

    African Journals Online (AJOL)

    Fusarium circinatum is an important fungal pathogen of Pinus species. In South Africa, it is the most significant pathogen of Pinus patula seedlings in forestry nurseries where it presents a substantial constraint to productivity and can continue to cause mortality in-field for up to two years after establishment. This study ...

  16. Determination of processed soybean meal degradability by Pinus ...

    African Journals Online (AJOL)

    Determination of processed soybean meal degradability by Pinus eldarica methanol extract. ... Protected soybean meal is an important part of high producing dairy cow diet and many methods are used for its safe and economic processing. Pinus eldarica contains xylose and resins and results show that these components ...

  17. An evaluation of wood properties of Pinus caribeae (Morelet) in ...

    African Journals Online (AJOL)

    This paper examines the effects of within tree variation on wood density, ring width and anisotropic shrinkage of Pinus caribeae (Morelet) among tree partitions in Oluwa pine plantation. Five 15-year old Pinus caribeae (Morelet) in three partitions were randomly selected from the plantation and felled for the study. Wood ...

  18. MORPHOMETRIC ANALYSIS ON CHROMOSOMES OF TROPICAL Pinus SPECIES

    Directory of Open Access Journals (Sweden)

    Lília Rosário Ribeiro

    2009-01-01

    Full Text Available Karyotypic analysis of Pinus oocarpa Schiede ex Schltdl., Pinus patula Schltdl. & Cham. and of provenances Jócon Yoro, Las Camelias and San Rafael del Norte of Pinus tecunumanii Eguiluz & J. P. Perry were accomplished to provide information for definition of Pinus tecunumanii taxonomic status. Characterization of mitotic chromosomes stained with Giemsa and with 4', 6-diamidino-2- phenylindoldihydrochlorid (DAPI fluorochrome confirmed the karyotypic pattern reported for most of the Pinus species, which present eleven pairs of metacentric chromosomes, very similar in regard to length and morphology, and a submetacentric pair for all the taxa studied. Sharp definition of secondary constrictionsrevealed by DAPI staining allowed distinction of species and provenances by the number and position of this cytological marker. Pinus tecunumanii was also different from the other two species in regard to total length of haploid set. The results support the species status for Pinus tecunumanii as well as present evidence that in addition to point mutations, structural alterations contributed toward intra and interspecies differentiation into the genus Pinus.

  19. Development and validation of stem volume models for Pinus kesiya ...

    African Journals Online (AJOL)

    Stem volume equations (overbark) were developed, using established volume equation forms, and validated using a subset of the data collected for Pinus kesiya in Benguet province, Philippines. A total of 481 trees from Pinus kesiya stands in Benguet were measured through non-destructive sampling. The data set was ...

  20. Morphological evaluation of the Pinus kesiya complex (Pinaceae)

    Czech Academy of Sciences Publication Activity Database

    Businský, R.; Frantík, Tomáš; Vít, Petr

    2014-01-01

    Roč. 300, č. 2 (2014), s. 273-285 ISSN 0378-2697 Institutional support: RVO:67985939 Keywords : morphological var iation * Pinus densata ssp. tibetica * Pinus kesiya complex Subject RIV: EF - Botanics Impact factor: 1.422, year: 2014

  1. Germination and early seedling growth of Pinus densata Mast. provenances

    Science.gov (United States)

    Yulan Xu; Nianhui Cai; Bin He; Ruili Zhang; Wei Zhao; Jianfeng Mao; Anan Duan; Yue Li; Keith Woeste

    2016-01-01

    We studied seed germination and early seedling growth of Pinus densata to explore the range of variability within the species and to inform afforestation practices. Phenotypes were evaluated at a forest tree nursery under conditions that support Pinus yunnanensis, one of the presumed parental species of P. densata...

  2. Etnoeducación Indígena Intercultural en el Caribe Colombiano

    Directory of Open Access Journals (Sweden)

    Clemente Mendoza Castro

    2015-10-01

    Full Text Available El ensayo resume un avance del proyecto “Estudios etnoeducativos y curriculares en el Caribe colombiano”, tiene el propósito de reflexionar sobre la etnoeducación en Colombia como aporte a la educación desde las prácticas pedagógicas de los etnoeducadores indígenas. Se analiza la historia de la etnoeducación indígena en Colombia y a manera de ejemplo sintetiza las experiencias etnoinvestigativas que se desarrollan en las escuelas indígenas de la Sierra Nevada de Santa Marta, La Guajira y el Atlántico, visibilizando la visión que tienen los maestros indígenas de etnoeducación y currículo, prácticas pedagógicas, etnoinvestigación, formando la aproximación de un programa etnoeducativo curricular pensado desde la realidad social e intercultural en el Caribe colombiano. Se propone con argumentación la aproximación a un modelo curricular integrado desde la etnoeducación indígena intercultural para el Caribe colombiano.AbstractThis essay summarizes an advance of the project Ethnoeducational and curricular studies in the Colombian Caribbean, and its purpose is to reflect on the ethnoeducation in Colombia as a contribution to the education from pedagogical practices of native ethnoeducators. The history of the native ethnoeducation in Colombia is analyzed and ethnoresearch experiences carried out in the native schools at Sierra Nevada de Santa Marta, Guajira and Atlántico are synthesized making evident teachers’ view on ethnoeducation and curriculum, pedagogical practices, ethnoresearch, and training. This is an approximation to an ethnoeducational and curricular program thought from the social and intercultural reality in the Colombian Caribbean. The approximation to a curricular integrated model from the intercultural native ethnoeducation for the Colombian Caribbean it is proposed with arguments.

  3. A Collaborative Effort Between Caribbean States for Tsunami Numerical Modeling: Case Study CaribeWave15

    Science.gov (United States)

    Chacón-Barrantes, Silvia; López-Venegas, Alberto; Sánchez-Escobar, Rónald; Luque-Vergara, Néstor

    2017-10-01

    Historical records have shown that tsunami have affected the Caribbean region in the past. However infrequent, recent studies have demonstrated that they pose a latent hazard for countries within this basin. The Hazard Assessment Working Group of the ICG/CARIBE-EWS (Intergovernmental Coordination Group of the Early Warning System for Tsunamis and Other Coastal Threats for the Caribbean Sea and Adjacent Regions) of IOC/UNESCO has a modeling subgroup, which seeks to develop a modeling platform to assess the effects of possible tsunami sources within the basin. The CaribeWave tsunami exercise is carried out annually in the Caribbean region to increase awareness and test tsunami preparedness of countries within the basin. In this study we present results of tsunami inundation using the CaribeWave15 exercise scenario for four selected locations within the Caribbean basin (Colombia, Costa Rica, Panamá and Puerto Rico), performed by tsunami modeling researchers from those selected countries. The purpose of this study was to provide the states with additional results for the exercise. The results obtained here were compared to co-seismic deformation and tsunami heights within the basin (energy plots) provided for the exercise to assess the performance of the decision support tools distributed by PTWC (Pacific Tsunami Warning Center), the tsunami service provider for the Caribbean basin. However, comparison of coastal tsunami heights was not possible, due to inconsistencies between the provided fault parameters and the modeling results within the provided exercise products. Still, the modeling performed here allowed to analyze tsunami characteristics at the mentioned states from sources within the North Panamá Deformed Belt. The occurrence of a tsunami in the Caribbean may affect several countries because a great variety of them share coastal zones in this basin. Therefore, collaborative efforts similar to the one presented in this study, particularly between neighboring

  4. La importancia de la tecnología en el desarrollo de América Latina y el Caribe

    OpenAIRE

    Vera-Vassallo, Alejandro

    2014-01-01

    El documento gira en torno a tres ejes de la reflexión sobre el tema de la importancia de la tecnología para el desarrollo productivo y empresarial de América Latina y el Caribe. En la primera parte, el autor intenta bosquejar la posición relativa de América Latina y el Caribe, en materia de desarrollo tecnológico y competitividad internacional, con respecto a otras regiones del mundo tanto desarrolladas como en vías de desarrollo. En la segunda parte, se destaca brevemente las característica...

  5. Evolución geológica del margen Norte de la Placa del Caribe, República Dominicana

    OpenAIRE

    Pérez-Estaun, Andrés; Tavares, I.; García-Cortés, Ángel; Hernaiz Huerta, P. P.

    2002-01-01

    La Isla La Española se encuentra situada en la actualidad en la parte septentrional de la Placa del Caribe. Conjuntamente con Puerto Rico, constituye una unidad que puede interpretarse como una microplaca, limitada al Norte por una zona de subducción oblicua, con una fuerte componente de salto en dirección, y al Sur por otra zona de subducción incipiente a la que se asocia la Fosa de los Muertos. El margen Norte de la Placa del Caribe ha evolucionado desde constituir un límite contro...

  6. ADOPCIÓN Y USO DE MEDIOS SOCIALES POR JÓVENES DE LA COSTA CARIBE DE COLOMBIA

    OpenAIRE

    Marcela López Ponce; Carlos Arcila Calderón

    2016-01-01

    El estudio identifica el grado de adopción de los medios sociales por parte de los jóvenes de la Costa Caribe de Colombia, los medios a los que acceden con mayor frecuencia, así como los usos principales que hacen de ellos. Mediante un análisis cuantitativo de tipo correlacional, se analizaron las respuestas de 502 jóvenes entre los 16 a 28 años pertenecientes al Servicio Nacional de Aprendizaje en la Costa Caribe. Los resultados mostraron que el grado de adopción de los principales medios...

  7. Construcción y deconstrucción territorial del Caribe Colombiano durante el siglo XIX

    OpenAIRE

    Domínguez, Camilo; Chaparro Mendivelso, Jeffer; Gómez, Carla

    2007-01-01

    El proceso de estructuración territorial del Caribe Granadino durante el siglo XIX, específicamente de 1810 a 1886, se aborda desde una perspectiva geohistórica y geopolítica. Se parte de la base ambiental de la región, para luego abordar la evolución de los límites administrativos mediante reconstrucciones cartográficas basadas en mapas históricos. El proceso de cambio abarcó los antiguos estados de Magdalena y Bolívar (incluyendo las islas de San Andrés y Providencia), la costa caribe de Pa...

  8. Plagas, enfermedades y saberes agrícolas en el Caribe, un estudio de caso

    Directory of Open Access Journals (Sweden)

    Fernández Prieto, Leida

    2011-08-01

    Full Text Available From the new approaches in social studies of science and technology concerned with the analysis of sites where science is developed and how it circulates, I am interested to observe the Caribbean as an island-center in the tropical agronomic knowledge development. For this, I study how the scientific steps were formulated to eradicate the plagues that currently affect more intensely coconut plantations in the Caribbean and Latin America, called Lethal Yellowing Disease of Coconut, which has destroyed the industry crops in many areas. The epidemic first appeared in the nineteenth century in the Caribbean Antilles, which forced local scientists to develop a database of global knowledge. In particular, I observe the process in Cuba from scientific discussions generated at the Royal Academy of Medical Sciences, Physical and Natural Sciences of Havana, as well as the entry of U.S. scientists in the new imperial context of early twentieth century, who expanded their field of study throughout the English and Spanish Caribbean through the exchange of ideas and experiences.

    A partir de los nuevos enfoques en los estudios sociales de la ciencia y la tecnología interesados en el análisis de los sitios donde se produce la ciencia y cómo circula, me interesa observar el Caribe como isla-centro en la construcción del saber agronómico tropical. Para ello estudio cómo se fueron formulando científicamente los pasos a seguir para erradicar una de las plagas que actualmente afectan con más intensidad las plantaciones de cocos del Caribe y América Latina, llamada Amarillamiento Letal del Cocotero (ALC, la cual ha destruido la industria de la copra en muchas zonas productoras. La epidemia apareció por vez primera en el siglo XIX en el Caribe antillano, donde obligó a los científicos locales a elaborar un sistema de conocimiento global. En particular, observo ese proceso en Cuba a partir de los debates científicos generados en la Real

  9. Buena Vecindad y Populismo: El Caribe en las Relaciones Interamericanas de 1933 a 1946

    Directory of Open Access Journals (Sweden)

    Antonio Gaztambide-Géigel

    2016-11-01

    Full Text Available Resumen La historiografía sobre la Política del Buen Vecino nos ha permitido distinguir dos períodos en las relaciones estadounidenses con América Latina entre 1933 y 1945. Se ha discutido poco, sin embargo, acerca del efecto de ese cambio sobre las políticas y en las relaciones. Tampoco se ha dicho mucho sobre las diferencias entre el contenido e impacto del Buen Vecino en el Caribe y en el resto del hemisferio. Aquí se abordan ambas dimensiones de las relaciones entre Estados Unidos y el Caribe vinculándolas a los desarrollos políticos internos en diversas sociedades de la región. Entre otras cosas, se manifiesta una tendencia a interpretar los cambios en el Caribe utilizando conceptos y teorías de los países centrales (como fascismo, comunismo, etcétera y del contexto latinoamericano (como nacionalismo, populismo, Buen Vecino, antimperialismo, etcétera. Este trabajo intenta revisar la aplicación de las teorías y conceptos, adoptar una perspectiva más comparativa y abordar cada experiencia en sus propios términos. Palabras chaves: Caribe, EUA, Relaciones Interamericanas, populismo, Política de buena vencidad. Boa Vizinhança e Populismo: o Caribe nas relações interamericanas de 1933 a 1946. Resumo A historiografia da Política de Boa Vizinhança permitiu-nos distinguir dois períodos nas relações dos EUA com a América Latina entre 1933 e 1945. Tem sido discutido pouco, no entanto, o efeito dessa mudança sobre a política e as relações. Também não disse muito sobre as diferenças entre o conteúdo e o impacto da Boa Vizinhança no Caribe e em outras partes do hemisfério. Aqui ambas as dimensões das relações entre os EUA e o Caribe serão abordadas, relacionando-as aos desenvolvimentos políticos internos em várias sociedades da região. Entre outras coisas, há uma tendência para interpretar mudanças no Caribe, utilizando conceitos e teorias dos países centrais (como o fascismo, comunismo, etc. e o contexto

  10. Criptofauna en rocas de Punta Nizuc, Caribe mexicano y su utilidad como biomonitor potencial

    OpenAIRE

    Campos-Vázquez, Concepción; Carrera-Parra, Luis F.; González, Norma Emilia; Salazar-Vallejo, Sergio I

    2015-01-01

    Para completar el diágnóstico de la calidad ambiental en el Parque Marino Nacional Isla Mujeres-Cancún-Nizuc Caribe mexicano, se estudió la posible utilidad de la criptofauna: de rocas como monitora de impacto. Se trazó un transecto a lo largo de un gradiente de intensidad de visitantes a Punta Nizuc. Se visitaron tres lugares (1.5-4 m proO, a 50, 250 Y 500 m de distancia de la plataforma turistica, y en cada uno de ellos se recogieron tres rocas. Los 1368 organismos encontrados fueron identi...

  11. Criptofauna en rocas de Punta Nizuc, Caribe mexicano y su utilidad como biomonitor potencial

    OpenAIRE

    Concepción Campos-Vázquez; Luis F Carrera-Parra; Norma Emilia González; Sergio I Salazar-Vallejo

    1999-01-01

    Para completar el diagnóstico de la calidad ambiental en el Parque Marino Nacional Isla Mujeres-Cancún-Nizuc Caribe mexicano, se estudió la posible utilidad de la criptofauna de rocas como monitora de impacto. Se trazó un transecto a lo largo de un gradiente de intensidad de visitantes a Punta Nizuc. Se visitaron tres lugares (1.5-4 m prof.), a 50, 250 y 500 m de distancia de la plataforma turistica, y en cada uno de ellos se recogieron tres rocas. Los 1368 organismos encontrados fueron ident...

  12. Los significados de la tortuga verde (chelonia mydas) en El Caribe costarricense

    OpenAIRE

    Vargas Mena, Emilio

    2012-01-01

    Introducción Este trabajo se enfoca en la identificación cualitativa de los significados culturales atribuidos a la tortuga verde (Chelonia mydas) en la historia del Caribe costarricense. Se distinguen, de maneras hipotéticas, tres etapas en la evolución cultural de esos significados: las tradiciones africanas ancestrales, la tradición jamaiquina y el sincretismo cultural de hoy. Se discute el alcance, el traslape y la oposición conflictiva entre los significados tradicionales y los modernos,...

  13. Effect of planting depth on growth of open-rooted Pinus elliottii and ...

    African Journals Online (AJOL)

    Effect of planting depth on growth of open-rooted Pinus elliottii and Pinus taeda seedlings in the United States: review paper. ... P. taeda showed no adverse effects on growth when planting seedlings up to 15 cm deep. ... Key words: Pinus elliottii, Pinus taeda, Survival, Seedling quality, Planting quality, Reforestation ...

  14. POTENSI ALELOPAT DAUN PINUS (Pinus spp. SEBAGAI BIOHERBISIDA PRA TUMBUH PADA GULMA KROKOT (Portulaca oleracea

    Directory of Open Access Journals (Sweden)

    Lutfy Ditya Cahyanti

    2015-06-01

    Full Text Available The aim of this experiment was to study the effectof pine leaf as allelophaty on purslane germination. Theexperiment were conducted at screen house Departmentof Biology, Faculty of Mathematics and Science, BrawijayaUniversity. The research is experimental design by nonfactorial Completely Randomized Blok Design, with threereplications, consisted of eleven levels. Purslane seeds sprout with control treatment, signifi cantly different from seedssprout ability in treatment solution leaves Pinus merkusii 2000ppm, and solution leaves of P. longaeva 2000 ppm. The resultshowed that 2000 ppm of P. merkusii extraction signifi cantlysuppressed 46% of purslane germination whereas 2000 ppmPinus longeava extraction signifi cantly suppressed of 41%campared to without any treatments (control.

  15. Genetic Analysis of Pinus sylvestris L. and Pinus sylvestris forma turfosa L. Using RAPD Markers

    Directory of Open Access Journals (Sweden)

    Beáta ÁBRAHÁM

    2010-03-01

    Full Text Available The purpose of the present study was to determine the level of genetic diversity within and among Ciuc basin, Romania (populations from Mohos and Luci raised bogs in Harghita Mountain and Sumuleu in Ciuc Mountain Pinus sylvestris populations using molecular markers. Two of populations (Mohos and Luci seems to be the descendants that survived the continental glaciation. Genetic diversity was analyzed by RAPD (Random Amplified Polymorphic DNA. Nine primers were selected for analysis, which generated reproducible bands. On base of presence or absence of homologues bands Nei’s gene diversity, the percentage of polymorphic loci and Nei’s unbiased genetic distance were calculated. The level of genetic variation among populations was found to be low. For both populations the variation values among populations were higher than within populations. The fossil records and geological historical data explain the extremely low genetic diversity of this species. Pinus sylvestris experienced strong bottlenecks during its evolutionary history, which caused the loss of genetic variation. Genetic drift and breeding in post-bottlenecked small populations may be the major forces that contribute to low genetic diversity and genetic differentiation of populations. Human activities may have accelerated the loss of genetic diversity in Pinus sylvestris.

  16. Responses to recent climate warming of Pinus sylvestris and Pinus cembra within their montane transition zone in the Swiss Alps

    Energy Technology Data Exchange (ETDEWEB)

    Haettenschwiler, S.; Koerner, C. [Basel Univ. (Switzerland). Botanisches Inst.

    1995-06-01

    Altitudinal and latitudinal distribution limits of trees are mainly controlled by temperature. Therefore climate warming is expected to induce upslope or poleward migrations. In the Swiss Central Alps, summers in the period 1982-1991 were on average 0.8 deg C warmer than those of the period 30 yr before. We investigated whether populations of conifers at the montane Pinus sylvestris-Pinus cembra ecocline exhibit demographic trends in response to that warming. We found no evidence for this. Young seedlings of Pinus sylvestris, the species which is expected to expand its range upward in a warmer climate, were virtually absent from all sites, whereas large fractions of Pinus cembra populations were observed in the seedlings and juvenile categories even below the present lower distribution limit of adult trees. This suggests that there are no major altitudinal shifts in response to the recent sequence of warmer summers. Germination and seedling survival trials with Pinus sylvestris suggest that temperature per se would not exclude this species even from establishing at the current treeline in the Swiss Central Alps. Similar results were found at the polar treeline. Phytotron tests of seedling survival showed much less drought resistance in Pinus sylvestris than in Pinus cembra which is in contrast to their phytogeographic distributions. Thus, the montane pine ecocline in the Swiss Central Alps seems to be stabilized by species interactions and may not be directly responsive to moderate climatic change, which needs to be taken into account in predictive attempts. 56 refs, 5 figs, 8 tabs

  17. Ethnobotanical survey of the medicinal flora used by the Caribs of Guatemala.

    Science.gov (United States)

    Girón, L M; Freire, V; Alonzo, A; Cáceres, A

    1991-09-01

    An ethnobotanical survey was conducted among the Carib population of Guatemala in 1988-1989. In general terms, the sample surveyed possessed a relatively good standard of living. Results indicated that health services were utilized by the population, and that domestic medicine, mainly plants (96.9%) was used by 15% of the population. One hundred and nineteen plants used for medicinal purposes were collected, of which 102 (85.7%) could be identified; a list of these together with the information provided for each plant is presented. The most frequently reported plants used as medicine are: Acalypha arvensis, Cassia alata, Cymbopogon citratus, Melampodium divaricatum. Momordica charantia, Neurolaena lobata, Ocimum basilicum, Petiveria alliacea and Solanum nigrescens. Most of these plants are found in the region, but some are brought from the Highlands or outside of the country, such as Malva parviflora, Matricaria chamomilla, Peumus boldus, Pimpinella anisum, Rosmarinus officinalis and Tagetes lucida. This survey demonstrated that the Carib population of Guatemala has survived in a transcultural environment of African and native Amerindian beliefs.

  18. Movilidades y resistencias de los caribes negros. Pasado y presente de los garífuna

    Directory of Open Access Journals (Sweden)

    Carlos Agudelo

    2013-12-01

    Full Text Available Los Caribes negros o Garífunas pueblan desde finales del siglo XVIII las costas caribes de 4países de América central (Belice, Guatemala, Honduras y Nicaragua. Actualmente, a travésde un proceso migratorio constante iniciado a mediados del siglo XX, buena parte de supoblación habita los Estados Unidos. La transnacionalidad originaria de su territorializaciónen Centroamérica y su presencia más reciente en Estados Unidos ha estado acompañadasiempre de una rica circulación de símbolos identitarios. Estos símbolos articulan diversasrepresentaciones etno-raciales que se transforman bajo la incidencia de procesos políticos ysociales de orden nacional, regional y global, hasta llegar a una identificación genérica comopueblo afrodescendiente. El propósito de este artículo es el de presentar, partiendo de unaperspectiva histórica, la dinámica de construcción de las identidades garífunas, los actoresque intervienen en dichos procesos y su dinámica política.

  19. Fire effects in Pinus uncinata Ram plantations

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    Adrián Cardil Forradellas

    2016-04-01

    Full Text Available Aim of study: Understanding fire ecology of main forest species is essential for a sound, scientifically based on managing of wildlands and also to assess likely implications due to changes in fire regime under a global change scenario. Few references can be found about fire ecology of Pinus uncinata Ram. (PU. PU species grows in the Central Pyrenees where large, severe wildland fires did not occur frequently in the past. However, several fires with extreme fire behavior have affected PU stands in last years and they might disturb other PU forest in the future.Area of study: Cabdella fire (February 2012, in Lleida province, is one of the several wildland fires occurred in 2012 (winter season in the Central Pyrenees. Fire affected a large PU plantation (102 ha located at 1.800-2,100 meters above the sea.Material and methods: We have analyzed first order fire effects in three fireline intensity thresholds along three years in terms of mortality ratio, scorched height, percentage of scorched crown volume and bark char height.Main results: PU seems to be a very tolerant species to low and medium fire line intensity but fire effects were very significant when fire line intensity was high. In medium fireline intensity sites, probability of mortality ranged from 15 to 30% and the dead trees had the highest values on scorched height and percentage of scorched crown volume.Research highlights: Results from this work supports that prescribed burning might be used to efficiently decrease fuel load and fuel vertical continuity while avoiding considerable PU mortality. It also displayed that when fuel management has been implemented, PU mortality might be limited even under extreme fire behavior.Abbreviations used: PU: Pinus uncinata Ram.

  20. 76 FR 80913 - Carib Energy (USA) LLC; Application for Long-Term Authorization To Export Domestically Produced...

    Science.gov (United States)

    2011-12-27

    ... Natural Gas for a 25-Year Period AGENCY: Office of Fossil Energy, DOE. ACTION: Notice of application... Application was filed under section 3 of the Natural Gas Act (NGA), as amended by section 201 of the Energy... is not prohibited by United States law or policy. Carib states that the source of natural gas supply...

  1. CO2 isotope analyses using large air samples collected on intercontinental flights by the CARIBIC Boeing 767

    NARCIS (Netherlands)

    Assonov, S.S.; Brenninkmeijer, C.A.M.; Koeppel, C.; Röckmann, T.

    2009-01-01

    Analytical details for 13C and 18O isotope analyses of atmospheric CO2 in large air samples are given. The large air samples of nominally 300 L were collected during the passenger aircraft-based atmospheric chemistry research project CARIBIC and analyzed for a large number of trace gases and

  2. CArdiac resynchronization in combination with beta blocker treatment in advanced chronic heart failure (CARIBE-HF): the results of the CARIBE-HF study.

    Science.gov (United States)

    Grosu, Aurelia; Senni, Michele; Iacovoni, Attilio; Gori, Mauro; Cantù, Francesco; Bisetti, Silvia; De Santo, Tiziana; De Luca, Alessandro; Gavazzi, Antonello

    2011-10-01

    Cardiac resynchronization therapy (CRT), combined with optimal medical therapy (OMT), is an established treatment for patients with advanced chronic heart failure (ACHF). In ACHF, carvedilol at the dose used in clinical trials, reduces morbidity and mortality. However, patients often do not tolerate the drug at the targeted dosage. The aim of the CARIBE-HF prospective observational study was to investigate the role of CRT in the implementation of carvedilol therapy in patients with ACHF. One hundred and six patients (aged 65 12 [mean +/- SD] years) with ACHF were enrolled and treated with OMT, in which carvedilol was titrated up to the maximal dose (phase 1). Subsequently, patients with left ventricular (LV) ejection fraction or =120 msec were assigned to CRT. Both CRT and NO-CRT patients underwent a long-term follow-up of 7 years (1193.98 +/- 924 days), while efforts to up titrate the carvedilol dose were continued during the second phase (471 + 310 days). Phase 1 was completed by 84 patients (79%), and 15 (18%) underwent CRT. The mean carvedilol dose in the CRT group was 19.0 +/- 17.8 mg, against 32.7 +/- 19.1 mg in the remaining 69 patients (P = 0.018). At the end of phase 2, CRT patients presented a significantly greater variation of increasing in the carvedilol dose than NO-CRT patients (+20.0 +/- 19.8 mg vs. -0.3 +/- 20.5 mg; P = 0.015), a greater NYHA class reduction (-0.8 +/- 0.6 vs. -0.2 +/- 0.7; P = 0.011), and a greater increase in LV ejection fraction (10.8 +/- 9 vs. 3.1 +/- 6.1; P = 0.018). The data from the CARIBE study suggest that, in ACHF, CRT may be effective in enabling the target dose of carvedilol to be reached. The significant improvement seen in LV function was probably due to a synergistic effect of CRT and carvedilol. During the extended follow-up (mean 1193.98 +/- 924 days) the mean dosage of carvedilol in the CRT group was significantly higher (P < 0.02).

  3. Serpúlidos (Polychaeta: Serpulidae del Caribe noroccidental con claves para la región del Gran Caribe: Salmacina, Ficopomatus, Pomatoceros, Pomatostegus, Protula, Pseudovermilia, Spirobranchus y Vermiliopsis

    Directory of Open Access Journals (Sweden)

    José Rolando Bastida-Zavala

    2000-12-01

    Full Text Available A partir de la revisión de más de 1 250 ejemplares de serpúlidos, 15 especies de la región del Gran Caribe fueron identificadas y caracterizadas. Trece especies fueron recolectadas en las costas de la Península de Yucatán y ocho fueron encontradas en otras localidades en el Golfo de México, otras siete son de Cuba y se incluyeron comentarios sobre el material tipo de dos especies más. Se realizaron tres análisis morfométricos para evaluar algunos caracteres. El primero sobre Pomatostegus stellatus (Abildgaard y especies y subespecies relacionadas: P. brachysoma Schmarda, P. macrosoma Schmarda, P. s. fruticosa Mörch, P. s. pentapoma Mörch y P. s. tetrapoma Mörch, indicando que estas son con-específicas. Otro fue sobre las especies de Spirobranchus de Blainville: S. dendropoma Mörch, S. giganteus (Pallas, S. polycerus (Schmarda y S. polycerus augeneri ten Hove; se demostró que S. giganteus es diferente de los otros tres táxones. El tercer análisis fue realizado sobre Vermiliopsis annulata (Schmarda s.l., y permitió reconocer tres formas diferentes. Asimismo, varios ejemplares incompletos probablemente pertenecen a un género indescrito. Se incluye una clave de identificación para todas las especies registradas en la región del Gran Caribe.From the revision of more than 1 250 serpulids, 15 species from the Grand Caribbean Region were identified and characterized. Thirteen species were collected along the shores of the Yucatan Peninsula and eight were found in other localities in the Gulf of Mexico, seven others are from Cuba and comments on type specimens of two species are also included. Three morphometric analyses were made to evaluate some characters. The first on Pomatostegus stellatus (Abildgaard, and related species and subspecies: P. brachysoma Schmarda, P. macrosoma Schmarda, P. s. fruticosa Mörch, P. s. pentapoma Mörch and P. s. tetrapoma Mörch, indicated that they are conspecific. Another one on Spirobranchus de

  4. Lepidochitona bullocki, una nueva especie de quitón (Polyplacophora: Ischnochitonidae del Caribe colombiano

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    Cedar I. García-Ríos

    2011-09-01

    Full Text Available El género Lepidochitona (Gray 1821 se encuentra representado en el Caribe por tres especies: L. liozonis (Dall & Simpson 1901, L. rosea (Kaas 1972 y L. rufoi. Veinte ejemplares de L. bullocki sp. nov. Fueron recolectados en un recorrido a lo largo del litoral rocoso, entre el norte de la playa del Rodadero y Puerto Luz, en Santa Marta, Colombia. Los ejemplares son pequeños, hasta 7.3mm, fueron recolectados a mano, entre 0.25 y 1.5m de profundidad, a distancias entre 1 y 5m de la orilla. Esta es la cuarta especie del género que se describe para el Caribe. Las tres especies previamente descritas son L. liozonis (Dall & Simpson, 1901, L. rosea Kaas, 1972 y L. rufoi García-Ríos, 2010. L. bullocki se diferencia de L. liozonis y L. rosea por tener la superficie del tegumento irregular y de otros colores. La misma se distingue de L. rufoi por tener muchas espículas hialinas largas, mayor tamaño, dientes centrales de la rádula anchos. Es la única especie del género en el Caribe que se localiza con mayor frecuencia en la superficie iluminada de las rocas, en el sublitoral somero.Lepidochitona bullocki, a new species of chiton (Polyplacophora: Ischnochitonidae from the Colombian Caribbean. The genus Lepidochitona is one of the most diverse in the Southern Caribbean. In order to describe this new species, twenty specimens of L. bullocki sp. nov. were collected by hand on the rocky coast, from 0.25 to 1.5m depth, and a shore distance of 1 to 5m, between the Northern section of Rodadero beach and Puerto Luz, in Santa Marta, Colombia. The specimens were small, with maximum observed size of 7.3mm. This is the fourth species of the genus Lepidochitona described for the Caribbean. The previously known species were L. liozonis (Dall & Simpson 1901, L. rosea (Kaas 1972 and L. rufoi (García-Ríos 2010. L. bullocki differs from L. liozonis and L. rosea in having a rough tegmentum and color. It differs from L. rufoi in having longer and numerous hyaline

  5. Tendencias e Instrumentos de Integración Regional en Latinoamericana y el Caribe

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    Maria Carolina Moreno

    2017-02-01

    Full Text Available El presente artí­culo es una revisión del tema de integración Latinoamericana y el Caribe desde una perspectiva inter y multidisciplinar que comprenden los procesos históricos de los paí­ses miembros, los análisis de la CEPAL tales como la teorí­a de la dependencia, el Sistema de Sustitución de Importaciones ISI, la heterogeneidad estructural de la región, el regionalismo abierto como resultado de las reformas económicas estructurales de finales de los años 80 y principios de los 90, y las nuevas tendencias o transformaciones de la integración en el marco de las teorí­as de las relaciones internacionales RI

  6. Moderno de otro modo. Lecciones caribeñas desde el lugar del salvaje

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    Michel-Rolph Trouillot

    2011-01-01

    Full Text Available «Modernidad» es un término turbio perteneciente a la familia de palabras que podemos etiquetar como «universales noratlánticos». Los universales noratlánticos son particulares que han adquirido un grado de universalidad, son pedazos de la historia de la humanidad convertidos en estándares históricos. En este artículo argumenta que en su más común despliegue como un universal noratlántico, la modernidad disfraza y desconoce a los muchos Otros que crea. Se examina entonces cómo desde el Caribe la modernidad nunca fue, y nunca podría ser, lo que dice ser.

  7. Literatura del caribe. De Martinica a Colombia cruce de caminos en el mar

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    Patrick Bouletreau

    2014-03-01

    Full Text Available En el ambiente de internacionalización quo se vive hoy en día, las letras no pueden quedarse atrás. La Literatura Comparada llega a punto para participar de este movimiento y, tratándose de literatura del Caribe, el material es amplio: diversos mundos se abren ante nuestros ojos, cada uno con sus características: Inglaterra, Holanda, Francia y España dejaron sus huellas, África trajo su parte de magia, los rasgos autóctonos perduran. En esta Óptica, al poner de evidencia similitudes de idiosincrasia, contribuimos a reforzar unas relaciones interculturales: en este caso, nuestra región colombiana con una isla antillana francófona.

  8. O Brasil e o Grão Caribe: fundamentos para uma nova agenda de trabalho

    OpenAIRE

    Avila,Carlos Federico Domínguez

    2008-01-01

    O artigo aborda as relações econômicas, políticas e de segurança internacional vigentes entre o Brasil e os 25 países da bacia do Caribe - México, América Central, Antilhas, Colômbia, Venezuela, Guiana e Suriname, além de uma dezena de territórios coloniais administrados por potências extra-regionais. Constata-se que as relações econômicas são muito intensas, especialmente em termos comerciais e de investimentos produtivos. O diálogo político entre as partes é construtivo, relevante e cada ve...

  9. Crustáceos asociados a macroalgas en Bajo Pepito, Isla Mujeres, Caribe mexicano

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    Concepción Campos Vázquez

    2000-06-01

    Full Text Available Como resultado de muestreos mensuales durante un año en Bajo Pepito, Isla Mujeres, Caribe mexicano, se presentan los crustáceos asociados a macroalgas recolectadas por buceo autónomo. Se hallaron un total de 148 organismos: tres ordenes, 11 familias, 18 géneros y 19 especies en nueve tipos de asociaciones. El orden con mayor abundacia fue Isopoda (112 seguido de Amphipoda (20 y Decapoda (16.Crustaceans associated with macroalgae were collected for one year by scuba diving in Bajo Pepito, Isla Mujeres, mexican Caribbean. A total of 148 organisms were found: three orders, 11 families, 18 genera and 19 species in nine types of associations. The order with highest abundance was Isopoda (112, followed by Amphipoda (20 and Decapoda (16.

  10. Maltrato entre iguales en adolescentes de zonas urbanas y rurales en el Caribe colombiano

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    Juan Carlos Quiroz Imbrecht

    2013-06-01

    Full Text Available El objetivo de esta investigación fue identificar la relación entre las conductas de acoso entre iguales en estudiantes de una zona urbana y una zona rural así como la relación de dichas conductas con el género. Se estudió una muestra de 200 estudiantes ubicados en el Caribe colombiano mediante un estudio correlacional en el cual se aplicó el Autotest de Cisneros y se analizaron los datos mediante estadísticos descriptivos y el cálculo del Chi cuadrado de Pearson. La prevalencia del maltrato fue del 75.6%, predominando las formas de violencia verbal y la exclusión social. Todas las formas de acoso se asociaron con el género y sólo los robos mostraron relación significativa con la zona geográfica.

  11. by Pinus virginiana in Mine Restoration

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    Jenise M. Bauman

    2012-01-01

    Full Text Available This study evaluated the influence of planting sites on the establishment and ectomycorrhizal (ECM colonization of American chestnut (Castanea denetata (Marsh. Borkh. on an abandoned coal mine in an Appalachian region of the United States. Root morphotyping and sequencing of the fungal internal transcribed spacer (ITS region were used to identify the ECM species associated with the chestnut seedlings. Germination, survival, ECM root colonization, and growth were assessed in three habitats: forest edge, center (plots without vegetation, and pine plots (a 10-year-old planting of Pinus virginiana. Seedlings in pine plots had higher survival (38% than the other plot types (center 9% and forest edge 5%; P=0.007. Chestnuts found colonized by ECM within the pine plots were larger (P=0.02, contributed by a larger root system (P=0.03. Forest edge and pine plots had more ECM roots than seedlings in center plots (P=0.04. ITS fungal sequences and morphotypes found among chestnut and pine matched Scleroderma, Thelephora, and Pisolithus suggesting these two plant species shared ECM symbionts. Results indicated that the presence of P. virginiana had a greater facilitative effect on growth and survival of chestnut seedlings.

  12. Gravitational stress on germinating Pinus pinea seeds.

    Science.gov (United States)

    Ranaldi, Francesco; Giachetti, Eugenio; Guerin, Elizabeth; Bacci, Stefano; Paoletti, Elena; Boddi, Vieri; Vanni, Paolo

    2003-06-01

    In the germination of lipid-rich seeds, the glyoxylate cycle plays a control role in that, bypassing the two decarboxylative steps of the Krebs cycle; it allows the net synthesis of carbohydrates from lipids. The activity of isocitrate lyase, the key enzyme of the glyoxylate cycle, is an indicator of the state of seed germination: stage of germination, growth of embryo, activation and progress of protein synthesis, depletion of lipidic supplies. In order to investigate the effects of gravity on seed germination, we carried out a study on the time pattern of germination of Pinus pinea seeds that were subjected to a hypergravitational stress (1000 g for 64 h at 4 degrees C), either in a dry or in a wet environment, before to be placed in germination plates. During the whole time of germination, we monitored the state of embryo growth and the most representative enzymes of the main metabolic pathways. In treated wet seeds, we observed an average germination of only 20% with a slowdown of the enzyme activities assayed and a noticeable degradation of lipidic reserves with respect to the controls. These differences in germination are not found for dry seeds.

  13. Dendrochronology of bristlecone pine, Pinus longaeva

    Energy Technology Data Exchange (ETDEWEB)

    Ferguson, C.W.

    1979-01-01

    Since 1953 the Laboratory of Tree-Ring Research has conducted dendrochronological studies of bristlecone pine (Pinus longaeva) in the White Mountains of California. This research resulted in the establishment of a continuous tree-ring sequence of 8253 yr. The millennia-old pines have emerged as a unique source of chronological data and the precisely dated wood is essential to certain paleoenvironmental and geophysical investigations. Over 1000 dendrochronologically dated decade samples of bristlecone pine supplied to three C-14 laboratories have been used to calibrate the radiocarbon time scale for the past seven millennia, a development of far reaching consequences in the fields of archaeology and geology. In addition, recent advances in other methods of analyzing past climatic variability - techniques involving stable isotope ratios, amino acid racemization, remanent magnetism, and trace element abundances - have greatly increased the demand for the wood of known age and, hence, for chronology development. Spanning the past 7500 yr, 1138 prepared decade samples, with a total weight of nearly 16 kg are available for study.

  14. Pinus cembra distribution in the Romanian Carpathians

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    Ioan Blada

    2008-09-01

    Full Text Available A map with the distribution of the Swiss stone pine (Pinus cembra L. in Romania was never made. However, long time ago, some poor or confused data collected from the Romanian Carpathians were inserted in a compiled at European level map; but this map do not reflects the species real geographic distribution in the Romanian Carpathians. Consequently, a initiative to build up a not to far from realitymap was made. A comprehensive literature and field survey concerning Swiss stone pine natural distribution in Romania was made. Two other sources of information were used, such as: the senior author's direct field survey to localize the species populations and information obtained from people involved in this issue. Based on the acquired data, the species digital distribution map of the Romanian Carpathians, was in premiere made. Because the distribution boundary of the species encompasses a large area, it does not mean that all hachured mountains and valley on the map are fully occupied by species.

  15. Pinus cembra distribution in the Romanian Carpathians

    Directory of Open Access Journals (Sweden)

    I. Blada

    2013-12-01

    Full Text Available A map with the distribution of the Swiss stone pine (Pinus cembra L. in Romania was never made. However, long time ago, some poor or confused data collected from the Romanian Carpathians were inserted in a compiled at European level map; but this map do not reflects the species real geographic distribution in the Romanian Carpathians. Consequently, a initiative to build up a not to far from reality map was made. A comprehensive literature and field survey concerning Swiss stone pine natural distribution in Romania was made. Two other sources of information were used, such as: the senior author's direct field survey to localize the species populations and information obtained from people involved in this issue. Based on the acquired data, the species digital distribution map of the Romanian Carpathians, was in premiere made. Because the distribution boundary of the species encompasses a large area, it does not mean that all hachured mountains and valley on the map are fully occupied by species.

  16. Diversidad y microestructura de quitones (Mollusca: Polyplacophora del Caribe de Costa Rica

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    Cedar I García-Ríos

    2011-03-01

    Full Text Available Los poliplacóforos asociados a los arrecifes de coral en la costa caribeña de Costa Rica han sido poco estudiados. El examen del cascajo de coral acumulado en el sublitoral somero, en cuatro estaciones de colección, localizadas en la Provincia de Limón reveló una diversidad de quitones mayor a la documentada. Anteriormente se habían registrado ocho especies para el Caribe costaricense: Ischnochiton erythronotus (C.B. Adams, 1845; Ischnoplax pectinata (Sowerby 1840; Stenoplax boogii (Haddon, 1886; S. purpurascens (C.B. Adams, 1845; Acanthopleura granulata (Gmelin, 1791; Chiton marmoratus Gmelin, 1791; C. tuberculatus Linnaeus, 1758; Acanthochitona rhodea (Pilsbry, 1893. Otras cinco se registran aquí por primera vez: Callistochiton portobelensis Ferreira 1976; Ischnochiton kaasi Ferreira 1987; I. pseudovirgatus Kaas 1972; Acanthochitona balesae Abbott 1954; Cryptoconchus floridanus (Dall 1889.Diversity and microstructure of quitons (Mollusca: Polyplacophora from the Caribbean of Costa Rica. The polyplacophorans of the coral reef on the Caribbean coast of Costa Rica have been insufficiently studied. The examination of coral rubble accumulated in the shallow sublitoral waters on four collection stations in Provincia Limón revealed a higher diversity of chitons than was documented. From the country eight species were previously known: Ischnochiton erythronotus (C.B. Adams 1845; Ischnoplax pectinata (Sowerby 1840; Stenoplax boogii (Haddon 1886; S. purpurascens (C.B. Adams 1845; Acanthopleura granulate (Gmelin 1791; Chiton marmoratus Gmelin 1791; C. tuberculatus Linnaeus 1758 and Acanthochitona rhodea (Pilsbry 1893. This study added five more species that are reported here for the first time: Callistochiton portobelensis Ferreira 1976; Ischnochiton kaasi Ferreira 1987; I. pseudovirgatus Kaas 1972; Acanthochitona balesae Abbott 1954 and Cryptoconchus floridanus (Dall 1889. Rev. Biol. Trop. 59 (1: 129-136. Epub 2011 March 01.

  17. Characterization of non-methane hydrocarbons in Asian summer monsoon outflow observed by the CARIBIC aircraft

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    A. K. Baker

    2011-01-01

    Full Text Available Between April and December 2008 the CARIBIC commercial aircraft conducted monthly measurement flights between Frankfurt, Germany and Chennai, India. These flights covered the period of the Asian summer monsoon (June–September, during which enhancements in a number of atmospheric species were observed in the upper troposphere over southwestern Asia. In addition to in situ measurements of trace gases and aerosols, whole air samples were collected during the flights, and these were subsequently analyzed for a suite of trace gases that included a number of C2–C8 non-methane hydrocarbons. Non-methane hydrocarbons are relatively short-lived compounds and the large enhancements in their mixing ratios in the upper troposphere over southwestern Asia during the monsoon, sometimes more than double their spring and fall means, provides qualitative evidence for the influence of convectively uplifted boundary layer air. The particularly large enhancements of the combustion tracers benzene and ethyne, along with the similarity of their ratios with carbon monoxide and emission ratios from the burning of household biofuels, indicate a strong influence of biofuel burning to NMHC emissions in this region. Conversely, the ratios of ethane and propane to carbon monoxide, along with the ratio between i-butane and n-butane, indicate a significant source of these compounds from the use of fossil fuels, and comparison to previous campaigns suggests that this source could be increasing. Photochemical aging patterns of NMHCs showed that the CARIBIC samples were collected in two distinctly different regions of the monsoon circulation: a southern region where air masses had been recently influenced by low level contact and a northern region, where air parcels had spent substantial time in transit in the upper troposphere before being probed. Estimates of age using ratios of individual NMHCs have ranges of 3–6 days in the south and 9–12 days in

  18. Airborne multi-axis DOAS measurements of atmospheric trace gases on CARIBIC long-distance flights

    Directory of Open Access Journals (Sweden)

    B. Dix

    2009-11-01

    Full Text Available A DOAS (Differential Optical Absorption Spectroscopy instrument was implemented and operated onboard a long-distance passenger aircraft within the framework of the CARIBIC project (Civil Aircraft for the Regular Investigation of the atmosphere Based on an Instrument Container. The instrument was designed to keep weight, size and power consumption low and to comply with civil aviation regulations. It records spectra of scattered light from three viewing directions (nadir, 10° above and below horizon using a miniaturized telescope system. The telescopes are integrated in the main pylon of the inlet system which is mounted at the belly of the aircraft. Fibre bundles transmit light from the telescopes to spectrograph-detector units inside the DOAS container instrument. The latter is part of the removable CARIBIC instrument container, which is installed monthly on the aircraft for a series of measurement flights.

    During 30 flight operations within three years, measurements of HCHO, HONO, NO2, BrO, O3 and the oxygen dimer O4 were conducted. All of these trace gases except BrO could be analysed with a 30 s time resolution. HONO was detected for the first time in a deep convective cloud over central Asia, while BrO, NO2 and O3 could be observed in tropopause fold regions. Biomass burning signatures over South America could be seen and measurements during ascent and descent provided information on boundary layer trace gas profiles (e.g. NO2 or HCHO.

  19. Estructura espacial de Eucinostomus argenteus (Pisces: Gerreidae en la zona norte del Caribe colombiano

    Directory of Open Access Journals (Sweden)

    Jorge Paramo

    2010-01-01

    Full Text Available Esta investigación se llevó a cabo para determinar la distribución espacial de la densidad (captura por unidad de área – CPUA y de la estructura de tallas de Eucinostomus argenteus y su relación con las variables ambientales en la zona norte del Caribe colombiano. Los datos fueron se tomaron durante un crucero de investigación realizado en  la época seca (febrero de 2006 entre  Puerto Estrella (La Guajira y Santa Marta (Magdalena. Las muestras biológicas se colectaron con una red de arrastre (en estratos de profundidad < 50 m y 50-100 m siguiendo un diseño de muestreo sistemático. Los individuos maduros y de tallas mayores se encontraron distribuidos principalmente entre Manaure y Punta Gallinas, donde la plataforma continental es muy ancha y la oceanografía local esta modulada por la surgencia estacional. Los peces juveniles, se distribuyeron al sur del área de estudio, entre Boca Camarones y el Río Buritaca, cerca de la costa. En este sector la plataforma es muy estrecha y con alta productividad biológica por la presencia de ríos, manglares y pastos marinos, sirviendo como zona de alimentación y refugio para E. argenteus. En general los resultados sugieren que las variables ambientales son importantes para la distribución espacial de la abundancia y las tallas de  E. argenteus en la zona norte del Caribe colombiano, siendo la temperatura y la profundidad las variables que predijeron mejor la distribución espacial de la especie.

  20. PENYAKIT HAWAR DAUN PINUS MERKUSII DI BERBAGAI PERSEMAIAN KAWASAN UTAMA HUTAN PINUS JAWA TIMUR

    Directory of Open Access Journals (Sweden)

    Sutarman .

    2015-03-01

    Full Text Available Leaf blight disease of Pinus merkusii in various nurseries of pine forest in major area of East Java. This study aims to: (i obtain isolates of pathogens, (ii determine disease on seedling growth during the critical period and the young plants, (iii determine the effect of pathogenic isolates on disease severity, and (iv determine the effect of altitude on severity of seedling’s leaf blight disease of Pinus merkusii from various nursery locations in East Java. The experiment was conducted in February-August 2014 at nine locations in the nursery and one young pine plantation site. Disease index data were analyzed using Microsoft Office Excel 2007 software to determine the regression model of the relationship between the index of disease with the independent variables and with Anova followed by Duncan test to find out the effect of altitude difference to the index of disease. Pathogen that causes late blight is Pestalotia theae Sawada. In the critical period, seedling disease index increased from 7.38 to an average of 26.96 in the nursery RPH Celaket; while on the young plants in the field in RPH Kemiri disease index ranged 28-31. Differences in altitude did not affect disease index difference. Based on disease index, three isolates of pathogens that require serious attention are Wagir isolates (985 m asl., the most virulent, Ngantang (500 m asl., and South Pujon (1200 m asl..

  1. Differential impacts of the southern pine beetle, Dendroctonus frontalis, on Pinus palustris and Pinus taeda

    Science.gov (United States)

    Friedenberg, N.A.; Whited, B.M.; Slone, D.H.; Martinson, S.J.; Ayres, M.P.

    2007-01-01

    Patterns of host use by herbivore pests can have serious consequences for natural and managed ecosystems but are often poorly understood. Here, we provide the first quantification of large differential impacts of the southern pine beetle, Dendroctonus frontalis Zimmermann, on loblolly pine, Pinus taeda L., and longleaf pine, Pinus palustris P. Mill., and evaluate putative mechanisms for the disparity. Spatially extensive survey data from recent epidemics indicate that, per square kilometre, stands of loblolly versus longleaf pine in four forests (380-1273 km2) sustained 3-18 times more local infestations and 3-116 times more tree mortality. Differences were not attributable to size or age structure of pine stands. Using pheromone-baited traps, we found no differences in the abundance of dispersing D. frontalis or its predator Thanasimus dubius Fabricius between loblolly and longleaf stands. Trapping triggered numerous attacks on trees, but the pine species did not differ in the probability of attack initiation or in the surface area of bark attacked by growing aggregations. We found no evidence for postaggregation mechanisms of discrimination or differential success on the two hosts, suggesting that early colonizers discriminate between host species before a pheromone plume is present. ?? 2007 NRC.

  2. Fusariose em Mudas de Pinus taeda Fusarium disease on Pinus taeda seedlings

    Directory of Open Access Journals (Sweden)

    Albino Grigoletti Júnior

    2011-03-01

    Full Text Available

    Viveiros comerciais têm apresentado mudas de Pinus taeda com sintomas de murcha e seca de ponteiros e morte, na Região Sul do Brasil. Isolamento em meio BDA e câmara úmida, teste de patogenicidade e microcultivo foram feitos para identificar o patógeno. Uma espécie de Fusarium foi isolada, cuja identificação encontra-se em andamento. Verificou-sepelos postulados de Koch que Fusarium sp. foi o agente causal dessa doença.
    Nurseries has presented Pinus taeda seedling with symptoms of wilt, tip blight and death, in Southern Region of Brazil. Isolation on PDA medium, moist chamber, pathogenicity test and microculture were made to identify the pathogen. A species of Fusarium was isolated, which is under identification. It was verified by Koch postulates that Fusarium sp. was the causal agent of this disease.

  3. Identificación de malezas trepadoras del banano (musa sp. en la zona caribe de costa rica

    Directory of Open Access Journals (Sweden)

    Ana Mar\\u00EDa Rodr\\u00EDguez

    2000-01-01

    Full Text Available Identificación de malezas trepadoras del banano (Musa sp. en la zona caribe de Costa Rica. Las poblaciones de las malezas conocidas como trepadoras, han ido en aumento en las plantaciones de banano en Costa Rica. La identificación es una base necesaria para otros estudios. El presente trabajo es de carácter exploratorio y deberá continuarse, ya que muchas de las especies objeto de este estudio son difíciles de identificar. Se procedió a visitar fincas bananeras ubicadas en diferentes regiones de la zona Caribe de Costa Rica y recolectar las principales malezas trepadoras del cultivo. Cucurbitaceae, Araceae y Fabaceae destacaron como las familias con el mayor número de especies

  4. Inequidades en salud entre países de Latinoamérica y el Caribe (2005-2010)

    OpenAIRE

    Cardona, Doris; Acosta, Laura Débora; Bertone, Carola Leticia

    2015-01-01

    Objetivo: Este trabajo pretende identificar la desigualdad en salud existente entre los países de América Latina y el Caribe, en los últimos a?nos (2005-2010), considerando que la medición de desigualdades es el primer paso hacia la identificación de inequidades en salud. Método: Se dise?nó un estudio ecológico, cuya unidad de análisis son 20 países latinoamericanos y del Caribe, en el cual se construyó el Índice de Inequidades en Salud (INIQUIS). Éste sintetiza, en un valor que varía entre 0...

  5. ¿En busca de una Pax Americana? La Cuenca del Caribe como el Mare Nostrum estadounidense.

    Directory of Open Access Journals (Sweden)

    Coronado Holman

    2012-01-01

    Full Text Available La periodización de la política exterior norteamericana frente a los Estados que componen la Cuenca del Caribe, permite formar una imagen de las conductas e identidades que se han tenido y aún se tienen con respecto a la inserción, participación e inclusión de Estados Unidos en el policy-making interno de la Cuenca del Caribe. Esta forma de hacer política de Estados Unidos ha sido cambiante y altamente influenciada por la idea de la estabilidad y control hemisférico que siempre ha pretendido, la cual puede llegar a ser comparada con el período de expansión del Imperio romano, cuyo punto de partida para el devenir de un gran Imperio fue el mar.

  6. Fire effects in Pinus uncinata Ram plantations

    Energy Technology Data Exchange (ETDEWEB)

    Cardil Forradellas, A.; Molina Terrén, D.M.; Oliveres, J.; Castellnou, M.

    2016-07-01

    Aim of study: Understanding fire ecology of main forest species is essential for a sound, scientifically based on managing of wildlands and also to assess likely implications due to changes in fire regime under a global change scenario. Few references can be found about fire ecology of Pinus uncinata Ram. (PU). PU species grows in the Central Pyrenees where large, severe wildland fires did not occur frequently in the past. However, several fires with extreme fire behavior have affected PU stands in last years and they might disturb other PU forest in the future. Area of study: Cabdella fire (February 2012), in Lleida province, is one of the several wildland fires occurred in 2012 (winter season) in the Central Pyrenees. Fire affected a large PU plantation (102 ha) located at 1.800-2,100 meters above the sea. Material and methods: We have analyzed first order fire effects in three fireline intensity thresholds along three years in terms of mortality ratio, scorched height, percentage of scorched crown volume and bark char height. Main results: PU seems to be a very tolerant species to low and medium fire line intensity but fire effects were very significant when fire line intensity was high. In medium fireline intensity sites, probability of mortality ranged from 15 to 30% and the dead trees had the highest values on scorched height and percentage of scorched crown volume. Research highlights: Results from this work supports that prescribed burning might be used to efficiently decrease fuel load and fuel vertical continuity while avoiding considerable PU mortality. It also displayed that when fuel management has been implemented, PU mortality might be limited even under extreme fire behavior. (Author)

  7. Variación del estado del mar al paso de las ondas tropicales por el mar Caribe.

    Directory of Open Access Journals (Sweden)

    Acacia del Sol Hernández

    2002-02-01

    Full Text Available El mar Caribe está frecuentemente afectado por ondas tropicales desde mayo hasta noviembre. Estos sistemas siempre incrementan el viento y el oleaje. En el presente trabajo fueron estudiadas cinco temporadas (1985-89 de ondas en esa zona geográfica. Se observó que estos sistemas incrementan a su paso el oleaje en 1,5 m. Cuando el patrón nuboso estaba mejor organizado este incremento fue superior.

  8. Civil Aircraft for the regular investigation of the atmosphere based on an instrumented container: The new CARIBIC system

    Directory of Open Access Journals (Sweden)

    C. A. M. Brenninkmeijer

    2007-09-01

    Full Text Available An airfreight container with automated instruments for measurement of atmospheric gases and trace compounds was operated on a monthly basis onboard a Boeing 767-300 ER of LTU International Airways during long-distance flights from 1997 to 2002 (CARIBIC, Civil Aircraft for Regular Investigation of the Atmosphere Based on an Instrument Container, caribic-atmospheric.com">http://www.caribic-atmospheric.com. Subsequently a more advanced system has been developed, using a larger capacity container with additional equipment and an improved inlet system. CARIBIC phase #2 was implemented on a new long-range aircraft type Airbus A340-600 of the Lufthansa German Airlines (Star Alliance in December 2004, creating a powerful flying observatory. The instrument package comprises detectors for the measurement of O3, total and gaseous H2O, NO and NOy, CO, CO2, O2, Hg, and number concentrations of sub-micrometer particles (>4 nm, >12 nm, and >18 nm diameter. Furthermore, an optical particle counter (OPC and a proton transfer mass spectrometer (PTR-MS are incorporated. Aerosol samples are collected for analysis of elemental composition and particle morphology after flight. Air samples are taken in glass containers for laboratory analyses of hydrocarbons, halocarbons and greenhouse gases (including isotopic composition of CO2 in several laboratories. Absorption tubes collect oxygenated volatile organic compounds. Three differential optical absorption spectrometers (DOAS with their telescopes mounted in the inlet system measure atmospheric trace gases such as BrO, HONO, and NO2. A video camera mounted in the inlet provides information about clouds along the flight track. The flying observatory, its equipment and examples of measurement results are reported.

  9. Searching the Literatura Latino Americana e do Caribe em Ciencias da Saude (LILACS) database improves systematic reviews

    OpenAIRE

    Clark, Otávio Augusto Câmara [UNIFESP; Castro, Aldemar Araujo [UNIFESP

    2002-01-01

    Background An unbiased systematic review (SR) should analyse as many articles as possible in order to provide the best evidence available. However, many SR use only databases with high English-language content as sources for articles. Literatura Latino Americana e do Caribe em Ciencias da Saude (LILACS) indexes 670 journals from the Latin American and Caribbean health literature but is seldom used in these SR. Our objective is to evaluate if LILACS should be used as a routine source of articl...

  10. Reference karyotype and cytomolecular map for loblolly pine (Pinus taeda L.)

    Science.gov (United States)

    M. Nurul Islam-faridi; C. Dana Nelson; Thomas L. Kubisiak

    2007-01-01

    A reference karyotype is presented for loblolly pine (Pinus taeda L., subgenus Pinus , section Pinus, subsection Australes), based on fluorescent in situ hybridization (FISH), using 18s-28s rDNA, 5s rDNA, and Arabidopsis-type telomere repeat sequence (A-type TRS). Well...

  11. Amenazas naturales asociadas al ascenso del nivel del mar en Caribe Colombiano

    Directory of Open Access Journals (Sweden)

    Robertson Kim Gregory

    2003-01-01

    Full Text Available Se presentan los resultados de recientes investigaciones sobre el impacto del ascenso del nivel del mar en la Costa Caribe colombiana, bases para el primer informe de Colombia a la Convención Internacional de Cambio Climático, adelantado en convenio con elIDE..-.1f. Con base en el estudio de las geoformas litorales, los procesos dinámicos asociadosy su evolución reciente, se evaluó la amenaza por inundación y erosión asociada al actual ascenso del nivel del mar, proyectado por IP(C (panel Intergubemamcntal de Expertos de Cambio Climático en un metro pata el año 2100. A partir de la interpretación de imágenes de satélite y fotografias aéreas, apoyada en información secundaria y verificación de campo, se identificaron 15 unidades geomorfológicas básicas de origen estructural, fluvial y marino. Con base las características geomorfológicas y criterios de resiliencia frente a la acción del oleaje y la inundación litoral, se generó un modelo morfodinámico que pronostica el impacto del ascenso del nivel marino para el litoral Caribe colombiano. De acuerdo con este análisis, se estima que las unidades geomorfológicas recientes desarrolladas durante los últimos 2.500 años podrían ser reactivadas por el actual ascenso del nivel del mar, afectando numerosos centros urbanos tales como Cartagena, Santa Marta, Puerto Colombia y Turbo y actividades económicas de-importancia como el comercio portuario y el turismo. Para los 1.819 Km. de línea de costa del Caribe Colombiano, se estima que el 33.7% presenta alta susceptibilidad a la erosión marina, representado por geoformas que presentan grari fragilidad ante los procesos erosivos. En la linea de costa restante, 31,2% presenta susceptibilidad mec!ia y 35.1% susceptibilidad baja y muy baja, en una linea de costa caracterizada por geoformas con fragilidad y mecanismos de resiliencia variables. Por inundación, se pronostica que 1192 Km2 de costa baja serán anegados, 2331 Km2 sufrir

  12. Nutrient use and uptake in Pinus taeda.

    Science.gov (United States)

    Albaugh, Timothy J; Allen, H Lee; Fox, Thomas R

    2008-07-01

    We quantified nitrogen (N), phosphorus (P), potassium (K), calcium (Ca) and magnesium (Mg) content, use (nutrient amount for one growth year), retranslocation (nutrients recycled before foliage senescence), uptake (use minus retranslocation), volume production per unit of uptake and fertilizer-uptake efficiency (percent applied taken up) in a 2 x 2 (nutrient and water) factorial experiment replicated four times in an 8-year-old loblolly pine (Pinus taeda L.) stand growing on a nutrient-poor sandy soil in Scotland County, North Carolina, USA. Over 14 years, we applied 1140, 168, 393, 168 and 146 kg ha(-1) of elemental N, P, K, Ca and Mg fertilizer, respectively, and an average of 710 mm year(-1) of irrigation. All plots received complete vegetation control. Fertilization about doubled tissue N, P, K and Mg contents at age 21, whereas irrigation resulted in smaller increases in nutrient contents. Maximum annual uptake was 101, 9.3, 44, 37 and 13 kg ha(-1) year(-1) and volume production per unit of nutrient uptake was 0.35, 3.5, 0.66, 1.1 and 3.1 m(3) kg(-1), for N, P, K, Ca and Mg, respectively. Irrigated plots had greater volume production per unit of N, P, K and Mg uptake than control plots, likely because irrigation allowed photosynthesis to continue during dry periods. Fertilized plus irrigated plots had less volume production per unit of these elements than the fertilized plots either because nutrient uptake exceeded the requirement for optimum growth or because available water (rainfall plus irrigation) was insufficient for the leaf area achieved with fertilization. At age 19, fertilizer-uptake efficiencies for N, P, K, Ca and Mg were 53, 24, 62, 57 and 39%, respectively, and increased with irrigation to 68, 36, 78, 116 and 55%, respectively. The scale of fertilizer uptake was likely a result of low native site nutrient availability, study longevity, measurement of all tissue components on site, a comprehensive assessment of coarse roots, and the 3-m rooting

  13. Estudio de potenciales alelopáticos originados por Eucalyptus globulus Labill., Pinus pinaster Ait. y Pinus radiata D.

    OpenAIRE

    Ballester, A.; Arias, A. M.; Cobián, B.; López Calvo, E.; Vieitez, E.

    2011-01-01

    Se ha estudiado el potencial alelopático de Eucalyptus globulus Labill., Pinus pinaster Ait. y Pinus radiata D. sobre el crecimiento y la germinación de diferentes especies herbáceas. Extractos acuosos de hojas y acículas recogidas en los meses de enero y abril inhiben fundamentalmente la germinación de las semillas de festuca, siendo la acción más importante en el mes de abril que en el de enero. El contacto directo entre hojas y acículas y las semillas a ensayar produce una inhibición muy f...

  14. In vitro regeneration of Pinus brutia Ten. var. eldarica (Medw ...

    African Journals Online (AJOL)

    This paper describes two in vitro regeneration systems through direct and indirect organogenesis in Pinus brutia using fascicles aseptic cultures as explants. Mechanical scarification and gibberellic acid (GA3) were evaluated on in vitro seed germination. Scarification was the treatment that allowed for in vitro seed ...

  15. Evolution of genome size and complexity in Pinus.

    Directory of Open Access Journals (Sweden)

    Alison M Morse

    Full Text Available BACKGROUND: Genome evolution in the gymnosperm lineage of seed plants has given rise to many of the most complex and largest plant genomes, however the elements involved are poorly understood. METHODOLOGY/PRINCIPAL FINDINGS: Gymny is a previously undescribed retrotransposon family in Pinus that is related to Athila elements in Arabidopsis. Gymny elements are dispersed throughout the modern Pinus genome and occupy a physical space at least the size of the Arabidopsis thaliana genome. In contrast to previously described retroelements in Pinus, the Gymny family was amplified or introduced after the divergence of pine and spruce (Picea. If retrotransposon expansions are responsible for genome size differences within the Pinaceae, as they are in angiosperms, then they have yet to be identified. In contrast, molecular divergence of Gymny retrotransposons together with other families of retrotransposons can account for the large genome complexity of pines along with protein-coding genic DNA, as revealed by massively parallel DNA sequence analysis of Cot fractionated genomic DNA. CONCLUSIONS/SIGNIFICANCE: Most of the enormous genome complexity of pines can be explained by divergence of retrotransposons, however the elements responsible for genome size variation are yet to be identified. Genomic resources for Pinus including those reported here should assist in further defining whether and how the roles of retrotransposons differ in the evolution of angiosperm and gymnosperm genomes.

  16. Growth process and diameter structure of Pinus tabulaeformis forest ...

    African Journals Online (AJOL)

    STORAGESEVER

    2009-10-19

    Oct 19, 2009 ... Using stem analysis method, the biomass, growing process and diameter structure of 21-year shady and sunny slope Pinus tabulaeformis forest were investigated in hilly loess-gully region. Results showed that there were distinct difference in the indexes, tree height, diameter at breast height (DBH).

  17. Bishop pine (Pinus muricata) of inland Marin County, CA

    Science.gov (United States)

    Constance I. Millar

    1986-01-01

    The locations and characteristics of five, small, previously undescribed stands of bishop pine (Pinus muricata) in central Marin Co., California, are reported. Three stands lie on dry sites in the Kent Lake Drainage north of Mt. Tamalpais: San Geronimo Ridge, a spur ridge above Little Carson Cr., and Oat Hill. These stands are anomalous in occurring...

  18. Relative size and stand age determine Pinus banksiana mortality

    Science.gov (United States)

    Han Y. H. Chen; Songling Fu; Robert A. Monserud; Ian C. Gillies

    2008-01-01

    Tree mortality is a poorly understood process in the boreal forest. Whereas large disturbances reset succession by killing all or most trees, background tree mortality was hypothesized to be affected by competition, ageing, and stand composition. We tested these hypotheses on jack pine (Pinus banksiana Lamb.) mortality using data from long-term...

  19. Growth process and diameter structure of Pinus tabulaeformis forest ...

    African Journals Online (AJOL)

    Using stem analysis method, the biomass, growing process and diameter structure of 21-year shady and sunny slope Pinus tabulaeformis forest were investigated in hilly loess-gully region. Results showed that there were distinct difference in the indexes, tree height, diameter at breast height (DBH) and timber volume ...

  20. Genomic DNA extraction from sapwood of Pinus roxburghii for ...

    African Journals Online (AJOL)

    A method for extraction of genomic DNA from sapwood tissues of mature tall trees of Pinus roxburghii, where collection of needle tissues is extremely difficult has been standardized. The extracted DNA was comparable to that obtained from the needle tissue in terms of yield and purity. The yield of extracted DNA ranged ...

  1. Antifungal metabolites from fungal endophytes of Pinus strobus

    DEFF Research Database (Denmark)

    Sumarah, Mark W; Kesting, Julie R; Sørensen, Dan

    2011-01-01

    The extracts of five foliar fungal endophytes isolated from Pinus strobus (eastern white pine) that showed antifungal activity in disc diffusion assays were selected for further study. From these strains, the aliphatic polyketide compound 1 and three related sesquiterpenes 2-4 were isolated and c...

  2. Evaluation of genetic diversity of Portuguese Pinus sylvestris L ...

    Indian Academy of Sciences (India)

    Home; Journals; Journal of Genetics; Volume 92; Online resources. Evaluation of genetic diversity of Portuguese Pinus sylvestris L. populations based on molecular data and inferences about the future use of this germplasm. J. Cipriano A. Carvalho C. Fernandes M. J. Gaspar J. Pires J. Bento L. Roxo J. Louzada J. Lima- ...

  3. Diversity and identification of fungi associated with needles of Pinus ...

    African Journals Online (AJOL)

    Diversity and identification of fungi associated with needles of Pinus radiata in Tasmania. ... Previous studies of P. radiata have been based on fungal isolation and not direct PCR detection from needles. This research was a component ... Keywords: endophyte, environmental PCR, fungal isolation, MOTU, needle fungi, OTU ...

  4. Missing and dark rings associated with drought in Pinus halepensis

    Science.gov (United States)

    Klemen Novak; Martin De Luis; Jozica Gricar; Peter Prislan; Maks Merela; Kevin T. Smith; Katarina. Cufar

    2016-01-01

    The responses of the vascular cambium and tracheid differentiation to extreme drought in Aleppo pine (Pinus halepensis Mill.) were investigated. The research focused on the drought year of 2005, in the primary study area at Maigmo (MAI) in southeastern Spain, with comparisons in Jarafuel (JAL) and Guardamar (GUA). The climate in this region is...

  5. Aboveground tree biomass for Pinus ponderosa in northeastern California

    Science.gov (United States)

    Martin W. Ritchie; Jianwei Zhang; Todd A. Hamilton

    2013-01-01

    Forest managers need accurate biomass equations to plan thinning for fuel reduction or energy production. Estimates of carbon sequestration also rely upon such equations. The current allometric equations for ponderosa pine (Pinus ponderosa) commonly employed for California forests were developed elsewhere, and are often applied without consideration potential for...

  6. Analgesic and Anti-Inflammatory Activity of Pinus roxburghii Sarg.

    Directory of Open Access Journals (Sweden)

    Dhirender Kaushik

    2012-01-01

    Full Text Available The Chir Pine, Pinus roxburghii, named after William Roxburgh, is a pine native to the Himalaya. Pinus roxburghii Sarg. (Pinaceae is traditionally used for several medicinal purposes in India. As the oil of the plant is extensively used in number of herbal preparation for curing inflammatory disorders, the present study was undertaken to assess analgesic and anti-inflammatory activities of its bark extract. Dried and crushed leaves of Pinus roxburghii Sarg. were defatted with petroleum ether and then extracted with alcohol. The alcoholic extract at the doses of 100 mg/kg, 300 mg/kg, and 500 mg/kg body weight was subjected to evaluation of analgesic and anti-inflammatory activities in experimental animal models. Analgesic activity was evaluated by acetic acid-induced writhing and tail immersion tests in Swiss albino mice; acute and chronic anti-inflammatory activity was evaluated by carrageenan-induced paw oedema and cotton pellet granuloma in Wistar albino rats. Diclofenac sodium and indomethacin were employed as reference drugs for analgesic and anti-inflammatory studies, respectively. In the present study, the alcoholic bark extract of Pinus roxburghii Sarg. demonstrated significant analgesic and anti-inflammatory activities in the tested models.

  7. Evaluation of seed production of scots pine ( Pinus sylvestris L ...

    African Journals Online (AJOL)

    This research was carried out to investigate seed production in a 13 years-old scots pine (Pinus sylvestris L.) clonal seed orchard, including 30 clones. Eight of cone and seed traits as number of fertile and infertile scales, cone volume, cone number, filled and empty seed number, seed efficiency and 1000 seed weight were ...

  8. Nomenclatural Notes on the Pinus mugo Complex in Central Europe

    Czech Academy of Sciences Publication Activity Database

    Businský, R.; Kirschner, Jan

    2006-01-01

    Roč. 46, č. 1 (2006), s. 129-139 ISSN 0079-2047 R&D Projects: GA ČR(CZ) GA521/05/2448 Institutional research plan: CEZ:AV0Z60050516 Keywords : Pinus mungo group * taxonomy * nomenclatura Subject RIV: EF - Botanics Impact factor: 0.076, year: 2006

  9. Evolutionary relationships of Slash Pine ( Pinus elliottii ) with its ...

    African Journals Online (AJOL)

    llozymes in bud tissue and monoterpene contents in xylem oleoresin of slash pine (Pinus elliottii) were analyzed from populations across the natural distribution, as well as those from other species in the AUSTRALES pines. Allozyme diversity measures of slash pine were similar to those found in other southern pines.

  10. Establishment of embryogenic suspension cultures of Pinus radiata ...

    African Journals Online (AJOL)

    The development of embryonal suspensor mass (ESM) from immature embryos of Pinus radiata on a solidified growth medium containing 0, 5 mgl -1 benzyladenine, 3, 0 mgl -1 2, 4-dichlorophenoxyacetic acid, 500 mgl -1 casein hydrolysate and 250 mgl -1 L-glutamine was used as inoculum to establish cell suspension ...

  11. Growth models for Pinus patula in Angola | Delgado-Matas ...

    African Journals Online (AJOL)

    This study developed growth models for Pinus patula Schiede ex Schltdl. et Cham. for the Central Highlands of Angola for simulating the development of stand characteristics. The model set included dominant height, individual-tree diameter increment, individual-tree height and self-thinning models. The study was based ...

  12. An interesting chemical polymorphism in Pinus sylvestris L.

    Directory of Open Access Journals (Sweden)

    Jerzy Szweykowski

    2014-01-01

    Full Text Available Intra- and interpopulational polymorphism in the production of phenolic compounds is described in Polish populations of Pinus sylvestris L. Two mutually exclusive forms of pine trees are present in changing proportions in all populations studied. This allows three groups of populations to be distinguished. The character of this differentiation is discussed.

  13. Some physical and strength properties of immature Pinus patula ...

    African Journals Online (AJOL)

    A study was conducted to determine physical and strength properties of immature Pinus patula grown in Iringa and Njombe regions of Tanzania. Sample trees aged 5 to 15 years were collected from farmers' woodlots. The trees were categorized into 5 age classes: 5 - 7, 8 - 10, 11 - 12, 13 - 14 and 15 years. Four trees from ...

  14. Experiments in rooting bishop pine (Pinus muricata D. Don) cuttings

    Science.gov (United States)

    Constance I. Millar

    1987-01-01

    Presented here are results of rooting studies using hedges established from juvenile seedlings of "blue" and "green" foliaged bishop pine (Pinus muricata D. Don) from Mendocino and Sonoma Counties, California. Rootability, averaged over all clones and all setting dates, was 88%. The average time for 50% of the...

  15. Calonectria (Cylindrocladium) species associated with dying Pinus cuttings

    NARCIS (Netherlands)

    Lombard, L.; Rodas, C.A.; Crous, P.W.; Wingfield, B.D.; Wingfield, M.J.

    2009-01-01

    Calonectria (Ca.) species and their Cylindrocladium (Cy.) anamorphs are well-known pathogens of forest nursery plants in subtropical and tropical areas of the world. An investigation of the mortality of rooted Pinus cuttings in a commercial forest nursery in Colombia led to the isolation of two

  16. The effects of fepeated prescribed burning on Pinus ponderosa growth

    Science.gov (United States)

    David L. Peterson; Stephen S. Sackett; Lindsay J. Robinson; Sally M. Haase

    1994-01-01

    The effect of repeated prescribed burning on long term growth of Pinus ponderosa in northern Arizona was examined. Fire treatments for hazard reduction were initiated in 1976,and growthwas evaluated in 1988 for fire rotations of 1, 2, 4, 6, 8, and 10 years. Dendroecological analysis shows that there were only small changes in treegrowth (compared tocontrols) in the...

  17. Percentile-based Weibull diameter distribution model for Pinus ...

    African Journals Online (AJOL)

    Using a site index equation and stem volume model developed for Pinus kesiya in the Philippines, a yield prediction system was created to predict the volume per ha (VPH) for each diameter class and, subsequently, the total volume of a stand. To evaluate the yield prediction system, the predicted mean VPH for each ...

  18. Intereses y rivalidades regionales en la Venezuela Caribeña

    Directory of Open Access Journals (Sweden)

    Arlene Urdaneta Quintero

    2006-01-01

    Full Text Available Durante su primer gobierno (1870-1877, el Presidente Antonio Guzmán Blanco desarrolló un programa que aspiraba a centralizar política y económicamente a Venezuela. Una de las disposiciones aprobadas fue el cierre de los puertos de Maracaibo y La Vela, para las operaciones de importación y exportación realizadas desde los Andes venezolanos y colombianos, a través del Caribe. Estas funciones fueron transferidas al distante Puerto Cabello. Gran parte del occidente del país fue afectado por esta medida que no consideraba la larga tradición histórica de centros económicos que por centurias habían liderado las actividades agroexportadoras de sus respectivosámbitos comerciales. La medida no sólo perjudicó los intereses de la región histórica del Lago y de Coro, favoreció a grupos económicos rivales establecidos en la región norcentral, asociados con el presidente de la república. En el caso particular del Zulia, el cierre del puerto de Maracaibo afectó a financistas, pequeños y grandes comerciantes, transportistas, navegantes, marineros, productores y diferentes colectivos del estado; otros sectores perjudicados fueron los comerciantes vinculados con esta actividad en Colombia y Curazao.

  19. Ornitofauna en cuatro ecosistemas naturales del laboratorio natural Snaki-URACCAN, Costa Caribe Norte de Nicaragua

    Directory of Open Access Journals (Sweden)

    Rudy A Salas Tathum

    2018-02-01

    Full Text Available El estudio se realizó en el laboratorio natural Snaki ubicado en el la comunidad de Moss, municipio de Waspam, Región Autónoma de la Costa Caribe Norte. Se ha diagnosticado la ornitofauna en los ecosistemas bosque ripario, bosque latifoliado, área agrícola y área pecuaria del laboratorio natural Snaki-URACCAN. Se realizaron transectos lineales y entrevistas informales a cazadores de la zona que permitió crear un listado de aves y su estado de conservación. Los resultados de los diferentes ecosistemas re ejaron la existencia de 49 diferentes especies de aves, pertenecientes a 23 familias y 12 órde- nes. Las especies representativas son: Aratinga nana, Cyanocorax Morio, Ramphocelus Passerinii, Quiscalus nicaraguensis, Procnias tricarunculata, Tachyponus rufus. Al com- parar los índices de diversidad, Shannon y Simpson encontraron similitudes en sus resultados, existiendo una diversidad considerable en el bosque, principalmente en el de galería.

  20. EVALUACIÓN CITÓTOXICA DE FRACCIONES DE ESPONJAS MARINAS DEL CARIBE COLOMBIANO

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    NATALIA ESTRADA-ORTIZ

    2013-01-01

    Full Text Available En la búsqueda de actividad antitumoral en el desarrollo de fármacos, se requiere evaluar la actividad citotóxica de manera preliminar, con el fin de realizar otras potenciales actividades como antitproliferación y efecto genotóxico. En la evaluación de diferentes fracciones obtenidas de esponjas marinas del Caribe Colombiano se ha encontrado actividad antiproliferativa en algunas de ellas. Por lo anterior, en este trabajo se evaluó la actividad citotóxica de trece fracciones obtenidas de las esponjas marinas Amphimedon compressa, Cinachyrella kuekenthali, Svenzea zeai e Ircinia campana para determinar su potencial citotóxico, en las líneas celulares Jurkat clon E6-1 y CHO-K1. Se emplearon las técnicas de MTT y coloración vital de Azul de Tripano para evaluar su citotoxicidad y viabilidad para determinar su concentración inhibitoria media. En conclusión, los resultados muestran que ninguna fracción, presenta actividad citotóxica significativa.

  1. Palisada perforata (Rhodomelaceae, Ceramiales en el Caribe mexicano Palisada perforata (Rhodomelaceae, Ceramiales from the Mexican Caribbean

    Directory of Open Access Journals (Sweden)

    Abel Sentíes

    2009-04-01

    Full Text Available Palisada perforata fue originalmente descrita para el litoral de Tenerife (islas Canarias, España, está ampliamente distribuida en el océano Atlántico oriental en la zona tropical y subtropical, mientras que en el lado occidental sólo está registrada como dudosa en Venezuela y Brasil. Además de las características típicas del género, esta especie presenta un crecimiento cespitoso con ejes decumbentes y arqueados y ramificación unilateral. En el presente trabajo los autores aportan por primera vez una descripción concisa de las estructuras vegetativas y tetraspóricas y se amplía la distribución geográfica de P. perforata con un nuevo registro en el Caribe mexicano.Palisada perforata was originally described from Tenerife (Canary Islands, Spain. This species has a wide distribution in tropical and subtropical zones of the Eastern Atlantic Ocean, but in the Western Atlantic there is only a doubtful record for Venezuela and Brazil. This species presents all typical features of the genus Palisada, being characterized by turf-like growth, the presence of arcuate and decumbent branches with erect branches disposed unilaterally. In the present paper we provide a detailed description of the vegetative and tetrasporangial structures. The geographical distribution of P. perforata in the Western Atlantic ocean was amplified with a new record in the Mexican Caribbean.

  2. Serpúlidos (Polychaeta: Serpulidae del Caribe noroccidental: Hydroides y Serpula

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    José Rolando Bastida-Zavala

    2000-12-01

    Full Text Available A partir de la revisión de más de 450 ejemplares de Hydroides y Serpula, 12 especies de la región del Gran Caribe fueron identificadas y caracterizadas. Ocho especies fueron recolectadas en las costas de la Península de Yucatán y cinco fueron encontradas en otras localidades en el Golfo de México, otras siete son de Cuba y se incluyeron comentarios sobre el material tipo de cinco especies más. Se realizó un análisis morfométrico sobre Hydroides mucronatus Rioja e Hydroides cf. mucronatus indicando varias diferencias entre ellas. Se incluyen comentarios a todas las especies.From the study of more than 450 specimens of Hydroides and Serpula, 12 species from the Grand Caribbean Region were identified and characterized. Eight species were collected along the shores of the Yucatan Peninsula and five were found in other localities in the Gulf of Mexico, seven others are from Cuba and comments on type specimens of five species are also included. One morphometric analysis made on Hydroides mucronatus Rioja and Hydroides cf. mucronatus, indicated several differences among them. Comments on all species are also included.

  3. MAESTROS Y ESCUELAS NORMALES EN EL CARIBE COLOMBIANO DURANTE EL RÉGIMEN FEDERAL

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    Luis Alarcón Meneses

    2012-01-01

    Full Text Available Este trabajo da cuenta de uno de los principales actores del escenario escolar en Caribe colombiano: el maestro, quien ocupo un lugar central en el proyecto educativo propuesto por los liberales radicales durante el régimen federal. En efecto, para los liberales radicales la mejor forma de avanzar en la consolidación del régimen republicano pasaba necesariamente por el fortalecimiento de la instrucción pública, para lo cual era indispensable formar maestros en escuelas especializadas como las normales, las cuales también fueron establecidas en Cartagena, Santa Marta y Barranquilla durante la segunda mitad del siglo XIX. En efecto, las escuelas normales se constituyeron en el principal escenario educativo para la profesionalización del maestro, por lo cual historiarlas resulta clave para conocer las dinámicas de cómo se dio en la región el proceso educativo impulsado por los radicales, al mismo tiempo que ello nos transporta al interior del espacio escolar; es decir, más allá del discurso pedagógico y de la retórica de administradores y supervisores que muchas veces observaban las instituciones escolares desde afuera sin entrar en detalles sobre las prácticas educativas que allí tenían lugar.

  4. Islas de ida y vuelta. Canarias y El Caribe en contexto colonial

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    Ortiz García, Carmen

    2004-12-01

    Full Text Available On the presupposition that the conquest of the Canary Islands set the colonial stage for the later Spanish enterprises in the Americas, the author discusses a number of elements of identity shared by the islands of both the eastern Atlantic and the Caribbean. Sugar, the slave trade and the raising of bananas, cochineal and tobacco are the instances chosen for this comparative analysis. In addition, the author makes a reference to the legends of the apparition of the Virgin of Charity at El Cobre, in Cuba, and of Candlemas in Tenerife.

    Partiendo de la idea de que la conquista de las Islas Canarias fue el primer ensayo colonial de lo que luego desarrollarían los españoles en América, se examinan algunos elementos de identidad entre el mundo isleño atlántico y caribeño, producidos precisamente por esa situación inicial de dominio colonial. El azúcar, la trata de esclavos, los cultivos de plátano, grana y tabaco son los ejemplos escogidos para este análisis comparado. Finalmente se hace una referencia comparativa de las leyendas de la aparición de la Virgen de la Caridad del Cobre en Cuba y de la Virgen de Candelaria en Tenerife

  5. Acumulación tóxica y despojo agroalimentario en La Mojana, Caribe colombiano

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    Juana Camacho S.

    2017-01-01

    Full Text Available Este artículo aborda el vínculo entre con - taminación y despojo en relación con el cultivo de arroz comercial en La Mojana, en el Caribe colombiano. Por su riqueza am - biental y productividad agrícola, esta región se ha proyectado como una despensa ali - mentaria. El arroz es el eje del sistema pro - ductivo, alimentario e identitario regional. A partir de un estudio etnográfico se exa - minan los efectos despojadores del uso de agroquímicos tóxicos en los medios de vida, la alimentación y la salud. Un argumento central es que, en su operación silenciosa y cotidiana, la contaminación vulnera bie - nes comunes y sistemas agroalimentarios locales, a la vez que refuerza otras formas históricas de despojo e inequidad social. Sin embargo, en pequeña escala, también exis - ten otros modelos y prácticas locales que expresan alternativas en los tres escenarios propuestos: producción, dieta e identidad.

  6. Cosecha y manejo de Copernicia tectorum (Kunth Mart. Para uso artesanal en el caribe colombiano

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    Maria Claudia Torres Romero

    2016-01-01

    Full Text Available En este estudio se caracterizaron los sistemas de manejo de Copernicia tectorum en dos localidades de la Región Caribe de Colombia: Plato (Magdalena, y Magangué (Bolívar. También se analizó el impacto de la cosecha de cogollos en la estructura de la población, el número de hojas y la longitud de los cogollos. En Plato sólo se cosechan cogollos de palmas subadultas y adultas, lo que parece no afectar las palmas a nivel individual, ni poblacional. En Magangué se cosechan palmas de las clases juveniles, lo que limita su crecimiento; esto da como resultado palmares con muy pocos adultos, comprometiendo su sostenibilidad, incluso en el corto plazo. El modelo de uso comunitario y de libre acceso a los palmares ha permitido su conservación en Plato; en Magangué, por el contrario, se hizo apropiación individual de la tierra, tanto legal como ilegal, lo que trajo fraccionamiento de la población, tala y restricción de acceso para la cosecha. En Plato el manejo debe enfocarse en detener la tala y la afectación a los complejos cenagosos donde crece la palma. En Magangué se debe controlar la sobreexplotación y favorecer el reclutamiento de las clases juveniles.

  7. LIBERALIZACIÓN, REFORMAS Y EMPLEO EN LA INDUSTRIA MANUFACTURERA DEL CARIBE COLOMBIANO, 1974-2004

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    Dewin Pérez Fuentes

    2010-01-01

    Full Text Available Este artículo tiene como objetivo analizar los principales efectos (sobre el empleo, la productividad y los costos laborales de la industria manufacturera de la región Caribe de las reformas económicas que se dieron en los años noventa en el marco del proceso de apertura e internacionalización de la economía colombiana. El patrón de industrialización y las características del cambio técnico intensivo en capital y ahorrador de mano de obra están relacionados con los malos resultados en términos de empleo en la industria regional después de las reformas. Por otro lado, la evolución de la productividad laboral y de las remuneraciones refleja una tendencia decreciente en el costo laboral unitario, por tanto, la explicación a la caída del empleo debe ser distinta a las presiones salariales sobre las utilidades empresariales.

  8. Comportamiento del mercado turístico extranjero en el Caribe Mexicano

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    Dr. Francisco J. Güemes-Ricalde

    2009-11-01

    Full Text Available El Caribe mexicano atrae visitantes de regiones distintas en diferentes épocas del año. A los prestadores de servicios turísticos les resulta difícil conocer y separar las preferencias de actividades que realizan los visitantes de cada país. Arriban visitantes mexicanos y extranjeros, las preferencias de estos últimos en relación a la demanda de servicios son diferentes. Contrario a lo que se conocía, el estudio de mercado determinó que la demanda mexicana representa un mercado importante en marcadas épocas del año. Se calcula que cada año alrededor de dos millones de turistas nacionales arriban a la Riviera y Costa Maya en la región norte de Quintana Roo. Conocer las preferencias de consumo de los diferentes segmentos de turistas y la forma en que evalúan la posibilidad de demandar los servicios turísticos da la pauta para ofrecérselos en forma diferenciada y adecuada a cada segmento y en relación a cada una de las diversas actividades turísticas que realizan, entre ellas el ecoturismo de la cual poco se conoce en esta región del país.

  9. Comparing EST-based genetic maps between Pinus sylvestris and Pinus taeda.

    Science.gov (United States)

    Komulainen, P; Brown, G R; Mikkonen, M; Karhu, A; García-Gil, M R; O'Malley, D; Lee, B; Neale, D B; Savolainen, O

    2003-08-01

    A genetic map of Pinus sylvestris was constructed using ESTP (expressed sequence tag polymorphism) markers and other gene-based markers, AFLP markers and microsatellites. Part of the ESTP markers (40) were developed and mapped earlier in Pinus taeda, and additional markers were generated based on P. sylvestris sequences or sequences from other pine species. The mapping in P. sylvestris was based on 94 F(1) progeny from a cross between plus-tree parents E635C and E1101. AFLP framework maps for the parent trees were first constructed. The ESTP and other gene sequence-based markers were added to the framework maps, as well as five published microsatellite loci. The separate maps were then integrated with the aid of AFLPs segregating in both trees (dominant segregation ratios 3:1) as well as gene markers and microsatellites segregating in both parent trees (segregation ratios 1:1:1:1 or 1:2:1). The integrated map consisted of 12 groups corresponding to the P. taeda linkage groups, and additionally three and six smaller groups for E1101 and E635C, respectively. The number of framework AFLP markers in the integrated map is altogether 194 and the number of gene markers 61. The total length of the integrated map was 1,314 cM. The set of markers developed for P. sylvestris was also added to existing maps of two P. taeda pedigrees. Starting with a mapped marker from one pedigree in the source species resulted in a mapped marker in a pedigree of the other species in more than 40% of the cases, with about equal success in both directions. The maps of the two species are largely colinear, even if the species have diverged more than 70 MYA. Most cases of different locations were probably due to problems in identifying the orthologous members of gene families. These data provide a first ESTP-containing map of P. sylvestris, which can also be used for comparing this species to additional species mapped with the same markers.

  10. Narcotráfico, violencia y crisis social en el Caribe insular colombiano: El caso de la isla de San Andrés en el contexto del Gran Caribe

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    Silvia Mantilla

    2011-01-01

    Full Text Available El presente artículo tiene por objetivo presentar un diagnóstico preliminar de la magnitud del tráfico de drogas, sus dinámicas, modalidades, y las condiciones sociales y económicas que favorecen el desarrollo de este negocio ilegal en la isla de San Andrés (Colombia. El análisis se desarrolla, no obstante, en el marco de la condición histórica y natural de “zona de tránsito” de drogas, armas y otros recursos ilegales, que se le atribuye a la región del Gran Caribe, entendida como un continuo geográfico, histórico y cultural en el que se observan patrones comunes en materia de amenazas a la seguridad, la geopolítica de las relaciones con Estados Unidos y los efectos sociales y económicos derivados del flagelo del narcotráfico. En este sentido, el caso de la isla de San Andrés (Colombia se examina más como parte de la dinámica insular gran caribeña que como parte de las tendencias propias del negocio en la Colombia continental, lo que permite, sin embargo, establecer las conexiones entre ambos espacios regionales - el insular y el continental - y, a la vez, evaluar el impacto regional del fenómeno a partir de las conexiones ilegales que desde el archipiélago se establecen con algunos países vecinos del Gran Caribe. Finalmente, se sostiene la hipótesis de que el fenómeno del narcotráfico se instala en la isla como resultado de factores geohistóricos, culturales y socioeconómicos que en conjunto han determinado la participación activa de distintos sectores de la sociedad en este negocio ilegal.

  11. Peces colectados en el río Acandí (Chocó suroeste del Caribe colombiano Peces colectados en el río Acandí (Chocó suroeste del Caribe colombiano

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    Alvarez León Ricardo

    1991-12-01

    Full Text Available Se registra por primera vez la presencia de seis especies de peces colectados en el río Acandí durante la expedición URABA II, en febrero de 1985, tres de los cuales (Citharichtys spilopterus, Achirus lineatus y Sphoeroides testudineus, son nuevos registros para los ríos del Caribe colombiano. Six species of fishes, collected in the river Acandí during expedition URABA II, in February of 1985, are reported for first time, of the wish three (Citharichtys spilopterus, Achirus lineatus y Sphoeroides testudineus, is new report for the rivers of the Colombian Caribbean.

  12. Terpene chemodiversity of relict conifers Picea omorika, Pinus heldreichii, and Pinus peuce, endemic to Balkan.

    Science.gov (United States)

    Nikolić, Biljana; Ristić, Mihailo; Tešević, Vele; Marin, Petar D; Bojović, Srdjan

    2011-12-01

    Terpenes are often used as ecological and chemotaxonomic markers of plant species, as well as for estimation of geographic variability. Essential oils of relic and Balkan endemic/subendemic conifers, Picea omorika, Pinus heldreichii, and P. peuce, in central part of Balkan Peninsula (Serbia and Montenegro), on the level of terpene classes and common terpene compounds were investigated. In finding terpene combinations, which could show the best diversity between species and their natural populations, several statistical methods were applied. Apart from the content of different terpene classes (P. omorika has the most abundant O-containing monoterpenes and sesquiterpenes; P. heldreichii and P. peuce have the largest abundance of sesquiterpene and monoterpene hydrocarbons, resp.), the species are clearly separated according to terpene profile with 22 common compounds. But, divergences in their populations were established only in combination of several compounds (specific for each species), and they were found to be the results of geomorphologic, climatic, and genetic factors. We found similarities between investigated species and some taxa from literature with respect to terpene composition, possibly due to hybridization and phylogenetic relations. Obtained results are also important regarding to chemotaxonomy, biogeography, phylogeny, and evolution of these taxa. Copyright © 2011 Verlag Helvetica Chimica Acta AG, Zürich.

  13. Seasonal variations in red pine (Pinus resinosa) and jack pine (Pinus banksiana) foliar physio-chemistry and their potential influence on stand-scale wildland fire behavior

    Science.gov (United States)

    Matt Jolly; John Hintz; Rodman L. Linn; Rachael C. Kropp; Elliot T. Conrad; Russell A. Parsons; Judith Winterkamp

    2016-01-01

    The 'Spring Dip' in conifer live foliar moisture content (LFMC) has been well documented but the actual drivers of these variations have not been fully investigated. Here we span this knowledge gap by measuring LFMC, foliar chemistry, foliar density and foliar flammability on new and old foliage for an entire year from both Pinus resinosa (red pine) and Pinus...

  14. A consensus genetic map for Pinus taeda and Pinus elliottii and extent of linkage disequilibrium in two genotype-phenotype discovery populations of Pinua taeda

    Science.gov (United States)

    Jared W. Westbrook; Vikram E. Chhatre; Le-Shin Wu; Srikar Chamala; Leandro Gomide Neves; Patricio Munoz; Pedro J. Martinez-Garcia; David B. Neale; Matias Kirst; Keithanne Mockaitis; C. Dana Nelson; Gary F. Peter; John M. Davis; Craig S. Echt

    2015-01-01

    A consensus genetic map for Pinus taeda (loblolly pine) and Pinus elliottii (slash pine) was constructed by merging three previously published P. taeda maps with a map from a pseudo-backcross between P. elliottii and P. taeda. The consensus map positioned 3856 markers via...

  15. Redes de distribución de caribú en Sheshatshiu, Labrador: una estrategia de modelización

    Directory of Open Access Journals (Sweden)

    Damian Castro

    2009-07-01

    Full Text Available La localidad de Sheshatshiu, en la península de Québec/Labrador, es uno de los asentamientos del pueblo Innu impulsados por el gobierno canadiense en los 1950s y 1960s. A pesar de la crisis alimentaria que la sedentarización forzada produjo, el caribú sigue constituyendo una parte importante de la dieta y la cultura Innu. El objetivo de este trabajo es mostrar una estrategia de modelización de la distribución de caribú en Sheshatshiu. La metodología seleccionada incluye tres pasos. El primer paso de modelización es el diseño de una base de datos con la información de distribución obtenida a partir de una encuesta en la que se relevaron 30 casas aleatoriamente y un subsiguiente muestreo "bola de nieve". Luego, se usa el programa UCINET para determinar clusterización, conectividad y centralidad. El tercer y último paso es determinar el alcance la distribución de caribú a partir del análisis de los procedimientos previos.The town of Sheshatshiu, located in the Quebec-Labrador peninsula, is one of the settlements created by the Canadian government in the 1950s and 1960s. In spite of the nutritional crisis that the forced sedentarization produced, caribou is still an important part of the Innu diet and culture. The goal of this paper is to show a modeling strategy of the caribou distribution in Sheshatshiu. The selected methodology includes three steps. The first modeling step is the design of a database to store the distribution information obtained from a random survey of 30 households and a subsequent snowball survey. The second step is to determine the clusterization, connectivity and centrality measures, using UCINET software. The third and last step is establishing the scope of caribou distribution using the previous procedures.

  16. EL PELÍCANO BLANCO AMERICANO (PELECANUS ERYTHRORHYNCHUS EN COLOMBIA, CON COMENTARIOS SOBRE LOS EFECTOS DE LOS HURACANES EN EL CARIBE

    Directory of Open Access Journals (Sweden)

    ESTELA FELIPE A.

    2005-12-01

    Full Text Available Presentamos un registro fotográfico del Pelicano Blanco Americano (Pelecanus erythrorhynchus en un manglar de la isla de San Andrés, en el Caribe colombiano, con lo cual se confirma la presencia de esta especie en Colombia. Adicionalmente discutimos el posible efecto de los huracanes del Caribe en la dispersión de esta especie y los efectos que estas catástrofes naturales pueden tener en la conservación de la avifauna del Archipiélago de San Andrés y Providencia.

  17. EL PELÍCANO BLANCO AMERICANO (PELECANUS ERYTHRORHYNCHUS) EN COLOMBIA, CON COMENTARIOS SOBRE LOS EFECTOS DE LOS HURACANES EN EL CARIBE

    OpenAIRE

    ESTELA FELIPE A.; SILVA JOHN DOUGLAS; CASTILLO LUIS FERNANDO

    2005-01-01

    Presentamos un registro fotográfico del Pelicano Blanco Americano (Pelecanus erythrorhynchus) en un manglar de la isla de San Andrés, en el Caribe colombiano, con lo cual se confirma la presencia de esta especie en Colombia. Adicionalmente discutimos el posible efecto de los huracanes del Caribe en la dispersión de esta especie y los efectos que estas catástrofes naturales pueden tener en la conservación de la avifauna del Archipiélago de San Andrés y Providencia.

  18. Dos propuestas de clasificación climática para la vertiente Caribe costarricense según el sistema de Thornthwaite

    OpenAIRE

    Paula M. Pérez-Briceño; Eric J. Alfaro; Eric J. Alfaro

    2017-01-01

    Una alta variabilidad espacio-temporal en la temperatura y la precipitación son características del territorio costarricense, con una diferencia climática fuerte entre las dos vertientes, la Pacífica y el Caribe. La primera por estar a sotavento de la cadena central de montañas posee un régimen de menor humedad atmosférica mientras que la ladera a barlovento, recibe los vientos alisios cargados de humedad que determinan el clima de la vertiente Caribe, donde llueve prácticamente todo el año. ...

  19. Southern Forests: a Journal of Forest Science - Vol 190 (2001)

    African Journals Online (AJOL)

    Growth and provenance variation of Pinus caribaea var. hondurensis as an exotic species · EMAIL FULL TEXT EMAIL FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. GR Hodge, WS Dvorak, JL Romero, 43-52 ...

  20. Medios de recuperación utilizados por entrenadores en los IV Juegos Intercolegiados Centroamericanos y del Caribe

    OpenAIRE

    Moreno Bolívar, Hilario; Ayala Zuluaga, Carlos Federico; Melo Betancourth, Luis Gerardo

    2016-01-01

    El presente estudio tuvo como objetivos identificar los medios de recuperación y ayudas ergonutricionales empleados por parte de los entrenadores participes en los IV Juegos Intercolegiados Centroamericanos y del Caribe, así como la causa o razón por la que son utilizados. Métodos. A través de una encuesta validada, se desarrolló un estudio descriptivo y corte transversal donde fueron encuestados 41 entrenadores (36 de sexo masculino y 6 de femenino) de 13 modalidades deportivas y de 8 países...

  1. Legislación y Control de Riesgos de Salud en América Latina y el Caribe

    OpenAIRE

    Mónica Bolis

    2002-01-01

    Este estudio analiza la legislación en Latín América y el Caribe con el propósito de determinar en qué medida contribuyen, o no, a la eliminación de riesgos para la salud. Los países incluidos son: Argentina, Bahamas, Barbados, Belice, Bolivia, Brasil, Chile, Colombia, Costa Rica, Ecuador, El Salvador, Guatemala, Guyana, Honduras, Jamaica, México, Nicaragua, Panamá, Paraguay, Perú, República Dominicana, Trinidad y Tobago, Uruguay y Venezuela. La investigación se centró en las áreas de medicam...

  2. Afinidades biogeográficas de los galateoideos (Decapoda: Anomura del Caribe y Pacífico colombiano

    Directory of Open Access Journals (Sweden)

    Gabriel R. Navas S.

    2013-08-01

    Full Text Available Objetivo. Determinar la distribución y afinidades biogeográficas de los galateoideos de aguas colombianas con base en la literatura y muestras recolectadas durante expediciones realizadas entre 1999 y 2002. Materiales y métodos. Se recolectaron ejemplares en 100 estaciones entre 20 y 550 m de profundidad en el Caribe y Pacífico colombiano. El material recolectado, junto con la información geográfica existente en literatura para las especies conocidas para Colombia se emplearon para realizar mapas de distribución, los cuales se compararon con el “Mapa de ecorregiones marinas del mundo”. Resultados. Se obtuvo la información geográfica para 3247 ejemplares recolectados de 18 especies de los géneros Agononida, Anomoeomunida, Munida, Munidoposis y Pleuroncodes, y se complementó con la obtenida a partir de la literatura para las 40 especies de la superfamilia con presencia conocida en aguas colombianas. Se generaron cinco grupos principales de distribución: especies restringidas al Caribe, al Caribe y Atlántico occidental, Anfiatlánticas, restringidas al Pacífico oriental y Anfiamericanas. Se encontró que el 53 % de las especies recolectadas en el Caribe se presentan también en la provincia Atlántico Norte Cálido-Templado, y para el Océano Pacífico la mayor afinidad se da con la provincia Pacífico Oriental Tropical. Conclusiones. Los galateoideos en aguas colombianas presentan ámbitos geográficos y batimétricos amplios, presentándose simpatría entre algunas especies. Las de aguas someras presentan mayores restricciones que aquellas de distribución en aguas profundas. Los mecanismos de distribución de las especies corresponden con el ciclo de vida de cada una y las corrientes predominantes en las provincias.

  3. Identificación de malezas trepadoras del banano (musa sp.) en la zona caribe de costa rica

    OpenAIRE

    Ana Mar\\u00EDa Rodr\\u00EDguez; Ren\\u00E1n Ag\\u00FCero

    2000-01-01

    Identificación de malezas trepadoras del banano (Musa sp.) en la zona caribe de Costa Rica. Las poblaciones de las malezas conocidas como trepadoras, han ido en aumento en las plantaciones de banano en Costa Rica. La identificación es una base necesaria para otros estudios. El presente trabajo es de carácter exploratorio y deberá continuarse, ya que muchas de las especies objeto de este estudio son difíciles de identificar. Se procedió a visitar fincas bananeras ubicadas ...

  4. Iniciativa Regional de Reforma del Sector de la Salud en América Latina y el Caribe

    OpenAIRE

    Pedro Crocco; Patricia Schroeder; María Teresa Villen; Edwina Yen

    2000-01-01

    Muchos países de América Latina y el Caribe están introduciendo reformas que pueden influir profundamente en la forma como se prestan los servicios de salud y en quienes los reciben. Tanto en la Cumbre de las Américas de 1994 como en la "Reunión Especial sobre Reforma del Sector de la Salud" de 1995, organizada por la Organización Panamericana de la Salud/Organización Mundial de la Salud (OPS/OMS), el Banco Interamericano de Desarrollo, el Banco Mundial y otros organismos multilaterales y bil...

  5. Cuantificación del potencial energético undimotriz en las costas del Caribe colombiano

    OpenAIRE

    Jaime P; Wilson Becerra Colpas

    2017-01-01

    En este documento se describen los avances en la cuantificación de la energía de las olas de la costa caribeña colombiana. La metodología utilizada servirá como punto de partida para establecer el potencial energético en Colombia para este tipo de suministro energético. En la actualidad, el potencial energético teórico estimado en las ondas de la costa cercana en la costa atlántica es de aproximadamente 1107 MW y esto fue posible con datos que se han recogido y procesado desde enero de 2014. ...

  6. Trapping, chemistry, and export of trace gases in the South Asian summer monsoon observed during CARIBIC flights in 2008

    Directory of Open Access Journals (Sweden)

    A. Rauthe-Schöch

    2016-03-01

    Full Text Available The CARIBIC (Civil Aircraft for the Regular Investigation of the Atmosphere Based on an Instrument Container passenger aircraft observatory performed in situ measurements at 10–12 km altitude in the South Asian summer monsoon anticyclone between June and September 2008. These measurements enable us to investigate this atmospheric region (which so far has mostly been observed from satellites using the broad suite of trace gases and aerosol particles measured by CARIBIC. Elevated levels of a variety of atmospheric pollutants (e.g. carbon monoxide, total reactive nitrogen oxides, aerosol particles, and several volatile organic compounds were recorded. The measurements provide detailed information about the chemical composition of air in different parts of the monsoon anticyclone, particularly of ozone precursors. While covering a range of 3500 km inside the monsoon anticyclone, CARIBIC observations show remarkable consistency, i.e. with distinct latitudinal patterns of trace gases during the entire monsoon period. Using the CARIBIC trace gas and aerosol particle measurements in combination with the Lagrangian particle dispersion model FLEXPART, we investigated the characteristics of monsoon outflow and the chemical evolution of air masses during transport. The trajectory calculations indicate that these air masses originated mainly from South Asia and mainland Southeast Asia. Estimated photochemical ages of the air were found to agree well with transport times from a source region east of 90–95° E. The photochemical ages of the air in the southern part of the monsoon anticyclone were systematically younger (less than 7 days and the air masses were mostly in an ozone-forming chemical mode. In its northern part the air masses were older (up to 13 days and had unclear ozone formation or destruction potential. Based on analysis of forward trajectories, several receptor regions were identified. In addition to predominantly westward

  7. LOS SERVICIOS DE CUIDADO INFANTIL EN AMÉRICA LATINA Y EL CARIBE

    Directory of Open Access Journals (Sweden)

    María Caridad Araujo

    2015-01-01

    Full Text Available Los servicios de cuidado infantil para niños menores de cuatro años de edad han expandido su cobertura de forma importante en América Latina y el Caribe. Esta expansión ha buscado primordialmente facilitar el acceso de las mujeres al mercado laboral. El énfasis en la calidad de los servicios de cuidado durante los primeros años de la vida es fundamental. Este artículo sistematiza información sobre el diseño, la gestión, el financiamiento y la calidad de los servicios de cuidado infantil en la región. Entre sus principales hallazgos se encuentran los siguientes: i existe evidencia de una inconsistencia entre el objetivo que mayoritariamente declaran perseguir estos programas —el desarrollo infantil integral— y el diseño de los servicios que brindan; ii los programas que dependen de los municipios se destacan por tener mejores variables estructurales (asociadas, en general, con una mejor calidad del servicio, en comparación con aquellos de escala nacional, así como por un mayor nivel de inversión por niño atendido; y iii existe variabilidad en el costo unitario de atención, lo cual es consistente no sólo con una considerable heterogeneidad en el servicio sino también con diferencias en el costo-efectividad de distintos modelos de provisión y de gestión. Asegurar servicios de cuidado de calidad para todos los niños que acuden a ellos y garantizar que la oferta pública de estos servicios alcance a los niños de las familias más pobres son dos prioridades importantes y todavía pendientes en la agenda de la política social regional.

  8. Los escenarios sociales en América Latina y el Caribe

    Directory of Open Access Journals (Sweden)

    Kliksberg Bernardo

    2000-01-01

    Full Text Available Las más variadas fuentes han destacado la magnitud y profundidad de los problemas que sacuden a América Latina y el Caribe en el campo social y los riesgos que suponen para la democracia. Aunque hay otros que también merecerían ser considerados, en este artículo se reseñan sumariamente nueve problemas sociales clave de gran impacto en la Región: 1 el aumento de la pobreza, 2 su impacto, 3 el desempleo y la informalidad del empleo, 4 las carencias en materia de salud pública, 5 los problemas de la educación, 6 los nuevos pobres, 7 la erosión de la familia, 8 el aumento de la criminalidad y 9 el círculo perverso de la exclusión. La solución de estos problemas no admite demoras. Urge dar el salto a una visión integrada del desarrollo que logre un tipo de equilibrio diferente entre las políticas económicas y sociales, y que reconozca el papel imprescindible de estas últimas en la obtención de un desarrollo que tenga bases realmente sostenibles. Están en juego problemas no solo de recursos, sino también de prioridades, de grados de equidad y de organización social. El enfrentamiento de la pobreza y la inequidad en la Región requiere una revisión profunda de las consecuencias sociales de las políticas económicas, del crucial tema de la inequidad latinoamericana, la mayor del mundo, y del papel de las políticas sociales. Se necesita también una revalorización del papel de las políticas públicas.

  9. Dinámicas del poblamiento en el Caribe continental colombiano (1938-2005

    Directory of Open Access Journals (Sweden)

    Francisco Avella

    2011-01-01

    Full Text Available El espacio regional del Caribe continental colombiano está organizado de acuerdo al difícil poblamiento de lo que desde la colonia tradicionalmente se han llamado zonas no aptas para el poblamiento.3 Estas zonas están caracterizadas por ser demasiado bajas, inundables, calurosas, de prolongadas sequías, y con períodos de intensas lluvias que no permiten una humedad relativa del suelo aceptable a lo largo de todo el año, por lo que no son aptas para laagricultura, según diversos analistas. Este espacio ha sido ocupado por una población que se ha movido entre la esperanza de tener tierras y la frustración de perderlas. Lo que ha producido una dinámica poblacional, que el estudio capta a partir de los saldos de efecto migratorio (SEM e ISEM en municipios agrupados en comarcas, como los estudiaron Guhl y Fornaguera, en cada uno de los Censos entre 1938 y 1964. El objeto de este análisis es el de buscar relaciones entre los procesos migratorios de resto (área rural y "cabecera" (área urbana, comparando los períodos intercensales, para formular posibles explicaciones sobre la asociación que los episodios violentos tienen con estos procesos migratorios y como se reflejan en la organización espacial del dichos territorios. Los resultados muestran patrones cíclicos en el área rural inversamente complementarios a los procesos violentos, que en unos períodos intercensales expulsan y en los más recientes atraen población. Lo que solo se puede entender a partir del contexto particular del conflicto en cada una de las comarcas, pues la suma de lo que sucede en las comarcas, no es igual al resultado de toda la región. Por el contrario su comportamiento es diferente.

  10. Modeling the Crust and Upper Mantle in Northern Beata Ridge (CARIBE NORTE Project)

    Science.gov (United States)

    Núñez, Diana; Córdoba, Diego; Cotilla, Mario Octavio; Pazos, Antonio

    2016-05-01

    The complex tectonic region of NE Caribbean, where Hispaniola and Puerto Rico are located, is bordered by subduction zone with oblique convergence in the north and by incipient subduction zone associated to Muertos Trough in the south. Central Caribbean basin is characterized by the presence of a prominent topographic structure known as Beata Ridge, whose oceanic crustal thickness is unusual. The northern part of Beata Ridge is colliding with the central part of Hispaniola along a transverse NE alignment, which constitutes a morphostructural limit, thus producing the interruption of the Cibao Valley and the divergence of the rivers and basins in opposite directions. The direction of this alignment coincides with the discontinuity that could explain the extreme difference between west and east seismicity of the island. Different studies have provided information about Beata Ridge, mainly about the shallow structure from MCS data. In this work, CARIBE NORTE (2009) wide-angle seismic data are analyzed along a WNW-ESE trending line in the northern flank of Beata Ridge, providing a complete tectonic view about shallow, middle and deep structures. The results show clear tectonic differences between west and east separated by Beata Island. In the Haiti Basin area, sedimentary cover is strongly influenced by the bathymetry and its thickness decreases toward to the island. In this area, the Upper Mantle reaches 20 km deep increasing up to 24 km below the island where the sedimentary cover disappears. To the east, the three seamounts of Beata Ridge provoke the appearance of a structure completely different where sedimentary cover reaches thicknesses of 4 km between seamounts and Moho rises up to 13 km deep. This study has allowed to determine the Moho topography and to characterize seismically the first upper mantle layers along the northern Beata Ridge, which had not been possible with previous MCS data.

  11. Especies de dinoflagelados del género Gambierdiscus (Dinophyceae del Mar Caribe mexicano

    Directory of Open Access Journals (Sweden)

    D.U Hernández-Becerril

    2004-09-01

    Full Text Available Algunos dinoflagelados de hábitos bénticos están relacionados con la ciguatera, por consumo de pescado, en áreas tropicales. En el Caribe mexicano la ciguatera es un padecimiento relativamente común, sin embargo solo existe un trabajo sobre este tema y muy pocos antecedentes publicados sobre fitoplancton y microalgas bénticas. En este estudio se analizó material recolectado en varios puntos a lo largo de las costas del Estado de Quintana Roo, tanto con red de fitoplancton (54 mm, como de sedimento y epífitas de plantas macroscópicas, para estudiar los dinoflagelados tóxicos y asociados. Se registra la presencia de tres especies del género Gambierdiscus, asociadas con la producción de toxinas causantes de la ciguatera: G. belizeanus, G. toxicus y G. yasumotoi, todas distribuídas en áreas costeras poco profundas, incluyendo lagunas costeras. Las especies han sido estudiadas con microscopía de luz y electrónica de barrido. Para el reconocimiento de las especies se emplearon los caracteres morfológicos usuales, pero eventualmente se pueden usar caracteres fisiológicos, ecológicos y moleculares. La llamada "comunidad ciguatoxigénica" también está formada por especies de los géneros Prorocentrum, Ostreopsis y Coolia, cuyo estudio florístico y taxonómico se recomienda ampliamente, así como investigaciones complementarias de aspectos biológicos, ecológicos, fisiológicos y epidemiológicos de esta comunidad

  12. Calonectria (Cylindrocladium) species associated with dying Pinus cuttings.

    Science.gov (United States)

    Lombard, L; Rodas, C A; Crous, P W; Wingfield, B D; Wingfield, M J

    2009-12-01

    Calonectria (Ca.) species and their Cylindrocladium (Cy.) anamorphs are well-known pathogens of forest nursery plants in subtropical and tropical areas of the world. An investigation of the mortality of rooted Pinus cuttings in a commercial forest nursery in Colombia led to the isolation of two Cylindrocladium anamorphs of Calonectria species. The aim of this study was to identify these species using DNA sequence data and morphological comparisons. Two species were identified, namely one undescribed species, and Cy. gracile, which is allocated to Calonectria as Ca. brassicae. The new species, Ca. brachiatica, resides in the Ca. brassicae species complex. Pathogenicity tests with Ca. brachiatica and Ca. brassicae showed that both are able to cause disease on Pinus maximinoi and P. tecunumanii. An emended key is provided to distinguish between Calonectria species with clavate vesicles and 1-septate macroconidia.

  13. Diabetes in the English-speaking Caribbean La diabetes en el Caribe de habla inglesa

    Directory of Open Access Journals (Sweden)

    Anselm Hennis

    2004-02-01

    Full Text Available Rates of diabetes mellitus in the English-speaking Caribbean have been rising in recent years, and they are projected to continue climbing in the new millennium. Prevalence rates across countries of the African diaspora mirror levels of Western acculturation, and available data emphasize the importance of obesity as a modifiable risk factor. The population-based Barbados Eye Studies have provided new information about the burden of ocular complications of diabetes such as retinopathy and lens opacities. Diabetes was shown to increase the risk of lens opacities, and 14% of prevalent cataract was attributed to diabetes. Persons with type 1 diabetes were particularly at increased risk of retinopathy, as a result of longer durations of illness and poor glycemic control. Other Caribbean studies have suggested that glycemic control in patients evaluated in various clinical settings is suboptimal, which raises important concerns about quality of care. Diabetics are at increased risk of mortality compared with nondiabetics, and that mortality risk increases with higher baseline levels of glycosylated hemoglobin, even among nondiabetics. These data highlight the need for urgent attention to public health and clinical strategies to prevent diabetes in unaffected persons as well as to prevent or reduce the burden of complications among those who are affected. Among the measures that should be adopted to stem the flood of diabetes in the Caribbean region are lifestyle interventions to promote better nutrition and to increase exercise; patient education, particularly about the central role of diabetes self-management; and the multidisciplinary team approach in the provision of care.Las tasas de diabetes mellitus en los países del Caribe de habla inglesa se han venido incrementando en los últimos años y se espera que continúen aumentando en el nuevo milenio. Las tasas de prevalencia en los países receptores de la diáspora africana reflejan los niveles

  14. Photosynthesis and respiration in the needles of Pinus sibirica and Pinus pumila and their putative hybrids

    Directory of Open Access Journals (Sweden)

    A.P. Zotikova

    2013-12-01

    Full Text Available A putative interspecific hybridization in Pinaceae family was investigated. Very rarely the physiological methods were involved in hybridization processes that occurs in the hybrid zones. It is well known that in most gymnosperms, the plastid genome is inherited from the paternal component while the mitochondrion is inherited from the maternal one. Therefore functioning pattern of organelles in the hybrid plant can suggest parent, from which they were inherited. The aim of this study was to indirectly establish the inheritance energy-transducing organelles (mitochondria, chloroplast according to their functioning. Current year needles from Siberian Stone Pine (Pinus sibirica Du Tour and Japanese Stone Pine (Pinus pumila (Pall. Regel as parent species and their putative hybrids were collected from Baikal Region. The photosynthesis rate was determined by using the spectrophotometer. The study of emission CO2 under dark respiration of needle was conducted with laser optical-acoustic gasanalyzer. The quantity was measured at 1, 2 and 3 hour after experiment start. The rate of the photoreduction ferricyanide potassium was characterized by the primary photochemical processes activity at the level of photosystem II. Comparison of pure species was shown that Japanese Stone Pine had higher functional activity of chloroplast as compared with SiberianStone Pine in spite of the fact that they are growing in similar environment conditions. Two of three analyzed hybrids had decreasedactivity of their chloroplasts. Unfortunately, in this case we can't conclude if the chloroplasts were inherited from Siberian Stone Pine orfrom Japanese Stone Pine. Chloroplast activity of the third hybrid was approximately similar to that of Japanese Stone Pine suggesting thatits chloroplasts were inherited from this parent. Consequently, the Siberian Stone Pine and the Japanese Stone Pine were maternal and paternal, respectively parents of

  15. Genomic DNA extraction from sapwood of Pinus roxburghii for ...

    African Journals Online (AJOL)

    Ashish

    2013-02-22

    Feb 22, 2013 ... A method for extraction of genomic DNA from sapwood tissues of mature tall trees of Pinus roxburghii, .... DNA as a template. PCR was performed on a thermal cycler. (Biorad, Mycycler) incorporating 10 ng genomic DNA to a 25 µl reaction mix containing 1X Taq buffer, 3 mM MgCl2, 0.2 mM each of dNTPs ...

  16. evaluation of the leave and bud decoctions pinus halepensis mill ...

    African Journals Online (AJOL)

    31 déc. 2014 ... La détermination de la composition chimique des huiles essentielles de Pinus halepensis M. a fait l'objet de ... végétale présente des activités antibactérienne, chimique et biologique [7,9]. L'objectif de ... Divers protocoles d'études étaient constatés dans des publications internationales en ce qui concerne ...

  17. Calonectria (Cylindrocladium) species associated with dying Pinus cuttings

    OpenAIRE

    Lombard, L.; Rodas, C.A.; Crous, P.W.; Wingfield, B.D.; Wingfield, M.J.

    2009-01-01

    Calonectria (Ca.) species and their Cylindrocladium (Cy.) anamorphs are well-known pathogens of forest nursery plants in subtropical and tropical areas of the world. An investigation of the mortality of rooted Pinus cuttings in a commercial forest nursery in Colombia led to the isolation of two Cylindrocladium anamorphs of Calonectria species. The aim of this study was to identify these species using DNA sequence data and morphological comparisons. Two species were identified, namely one unde...

  18. Biological invasion of Pinus ponderosa and Pinus contorta: case study of a forest plantation in Northwestern Patagonia; Invasion biologica de Pinus ponderosa y Pinus contorta: estudio de caso de una plantacion en la Patagonia noroccidental

    Energy Technology Data Exchange (ETDEWEB)

    Dezzotti, A.; Sbrancia, R.; Mortoro, A.; Monte, C.

    2009-07-01

    In the Southern Hemisphere, Pinus species from plantations can bring about processes of biological invasion that cause significant and permanent changes on the structure and functioning of surrounding natural ecosystems. The invasive character of Pinus ponderosa (P) and Pinus contorta (C) was examined for a 20-year old plantation located in the Alicura Forest Station (40 degree centigrade 40' S and 71 degree centigrade 00' W), through the analysis of abundance, age and spatial structures, and dispersal of natural regeneration. Seedlings and saplings were located largely within the plantation boundaries, and exhibited a density of 6.9 ind / ha (41 % for P and 59 % for C), a clustered spatial pattern with clumps dispersed not randomly, and a mean dispersal rate of 9.5 m / yr for P. ponderosa and 5.4 m / yr for P. contorta. Both species were invading the adjacent area, according to technical criteria based on ecological responses. However, regeneration niche is strongly hindering tree establishment and dispersal, probably due to high plant cover, presence of vertic soils, and absence of ectomycorrhizal fungi. These results can contribute to predict the capability of P. contorta and P. ponderosa to become invasive, in order to maximize the positive balance of forestry based on these species in northwestern Patagonia. (Author) 50 refs.

  19. ADOPCIÓN Y USO DE MEDIOS SOCIALES POR JÓVENES DE LA COSTA CARIBE DE COLOMBIA

    Directory of Open Access Journals (Sweden)

    Marcela López Ponce

    2016-11-01

    Full Text Available El estudio identifica el grado de adopción de los medios sociales por parte de los jóvenes de la Costa Caribe de Colombia, los medios a los que acceden con mayor frecuencia, así como los usos principales que hacen de ellos. Mediante un análisis cuantitativo de tipo correlacional, se analizaron las respuestas de 502 jóvenes entre los 16 a 28 años pertenecientes al Servicio Nacional de Aprendizaje en la Costa Caribe. Los resultados mostraron que el grado de adopción de los principales medios sociales es de 68 %, donde los usados con mayor frecuencia son Facebook (69.4 %, Google+ (57.6 %, Instagram (45.6 % y Twitter (42.6 %. Los datos también revelan que el uso principal que los usuarios hacen de los medios sociales es obtener información de noticias, seguido de conectarse con amigos, conectarse con familiares y encontrar música y videos. De acuerdo con la revisión de literatura, el estudio es el primero realizado en Colombia con una data obtenida de jóvenes de estratos 1 y 2 que tienen acceso frecuente a internet, lo cual contribuye a conocer la importancia que tienen los medios sociales para este grupo y a identificar las utilidades comunicacionales e informativas que brinda cada medio. Asimismo, se discuten las implicaciones prácticas del estudio.

  20. Capitales Nacionales y Caribeños en el Zulia: establecimiento de la primera Industria Azucarera Venezolana (1900-1920

    Directory of Open Access Journals (Sweden)

    Marisol Rodríguez Arrieta

    2006-01-01

    Full Text Available La asociación de hombres y mujeres zulianos, de diferentes clases y procedencia social, integrados en una red vinculada con capitales caribeños (puertorriqueños y cubanos transformaron, en las dos primeras décadas del siglo XX, la producción y el comercio de los derivados de la caña, creando una plataforma económica y social que facilitó el proceso de industrialización del azúcar por primera vez en Venezuela e incorporó el producto en el mercado nacional e internacional. La alianza criolla y caribeña se produjo cuando los actores sociales decidieron organizarse y fundar las compañías anónimas Unión Agrícola (1909 y Central Azucarero del Zulia (1912, localizadas en Bobures y Gibraltar del distrito Sucre, al sur del Lago de Maracaibo, las cuales mejoraron las prácticas tradicionales de explotación de la tierra y transformaron el estatus del agricultor y del comerciante en productores de materia prima y accionistas de las corporaciones azucareras. Las corporaciones azucareras operaron con tecnología proveniente de Cuba, Europa y Estados Unidos

  1. EL CAMINO DE LA PRIMERA VIRUELA EN EL NUEVO MUNDO, DEL CARIBE A TENOCHTITLÁN, 1493-1521

    Directory of Open Access Journals (Sweden)

    Elsa Malvido

    2008-12-01

    Full Text Available El tema que nos ocupa en ésta trabajo es el inicio de la nueva patología en el centro de convergencia de la historia americana de esos tiempos, el Caribe y desde ahí, su expansión atierra firme, o sea, que pretendemos perseguir el camino de la primer pandemia de viruela, para saber quiénes y cuándo la importaron, así como cuánto tiempo se tomó para continuar el contagio y los estragos que causó entre los habitantes nativos, es decir, jugar con la historia para hacer la geografía epidemiológica de la ruta de la viruela, utilizando los avances científicos de nuestros tiempos, así como incluir nuevos documentos y estudios del tema, para lo cual debemos hacer el viaje desde Cádiz a los mares caribeños recorriendo a las poblaciones de las islas y continuar elviaje por las rutas del padecimiento, desde la costa de la Vera Cruz hasta llegar al corazón de las culturas mesoamericanas, la gran Tenochtitlán.

  2. Interaction between research and diagnosis and surveillance of avian influenza within the Caribbean animal health network (CaribVET).

    Science.gov (United States)

    Lefrançois, T; Hendrikx, P; Vachiéry, N; Ehrhardt, N; Millien, M; Gomez, L; Gouyet, L; Gerbier, G; Gongora, V; Shaw, J; Trotman, M

    2010-04-01

    The Caribbean region is considered to be at risk for avian influenza (AI) because of predominance of the backyard poultry system, important commercial poultry production, migratory birds and disparities in the surveillance systems. The Caribbean animal health network (CaribVET) has developed tools to implement AI surveillance in the region: (i) a regionally harmonized surveillance protocol, (ii) specific web pages for AI surveillance on http://www.caribvet.net, and (iii) a diagnostic network for the Caribbean including AI virus molecular diagnostic capability in Guadeloupe and technology transfer. Altogether 303 samples from four Caribbean countries were tested between June 2006 and March 2009 by real time PCR either for importation purposes or following clinical suspicion. Following AI H5N2 outbreaks in the Dominican Republic in 2007, a questionnaire was developed to collect data for risk analysis of AI spread in the region through fighting cocks. The infection pathway of Martinique commercial poultry sector by AI through introduction of infected cocks was designed and recommendations were provided to the Caribbean veterinary services to improve fighting cock movement controls and biosecurity measures. Altogether, these CaribVET activities contribute to strengthen surveillance of AI in the Caribbean region and may allow the development of research studies on AI risk analysis.

  3. Mineral Analysis of Pine Nuts (Pinus spp. Grown in New Zealand

    Directory of Open Access Journals (Sweden)

    Leo P. Vanhanen

    2013-04-01

    Full Text Available Mineral analysis of seven Pinus species grown in different regions of New Zealand; Armand pine (Pinus armandii Franch, Swiss stone pine (Pinus cembra L., Mexican pinyon (Pinus cembroides Zucc. var. bicolor Little, Coulter pine (Pinus coulteri D. Don, Johann’s pine (Pinus johannis M.F. Robert, Italian stone pine (Pinus pinea L. and Torrey pine (Pinus torreyana Parry ex Carrière, was carried out using an inductively coupled plasma optical emission spectrophotometer (ICP-OES analysis. Fourteen different minerals (Al, B, Ca, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, P, S and Zn were identified in all seven varieties, except that no Al or Na was found in Pinus coulteri D. Don. New Zealand grown pine nuts are a good source of Cu, Mg, Mn, P and Zn, meeting or exceeding the recommended RDI for these minerals (based on an intake of 50 g nuts/day while they supplied between 39%–89% of the New Zealand RDI for Fe. Compared to other commonly eaten tree-nuts New Zealand grown pine nuts are an excellent source of essential minerals.

  4. Mineral Analysis of Pine Nuts (Pinus spp.) Grown in New Zealand

    Science.gov (United States)

    Vanhanen, Leo P.; Savage, Geoffrey P.

    2013-01-01

    Mineral analysis of seven Pinus species grown in different regions of New Zealand; Armand pine (Pinus armandii Franch), Swiss stone pine (Pinus cembra L.), Mexican pinyon (Pinus cembroides Zucc. var. bicolor Little), Coulter pine (Pinus coulteri D. Don), Johann’s pine (Pinus johannis M.F. Robert), Italian stone pine (Pinus pinea L.) and Torrey pine (Pinus torreyana Parry ex Carrière), was carried out using an inductively coupled plasma optical emission spectrophotometer (ICP-OES) analysis. Fourteen different minerals (Al, B, Ca, Cr, Cu, Fe, K, Mg, Mn, Na, Ni, P, S and Zn) were identified in all seven varieties, except that no Al or Na was found in Pinus coulteri D. Don. New Zealand grown pine nuts are a good source of Cu, Mg, Mn, P and Zn, meeting or exceeding the recommended RDI for these minerals (based on an intake of 50 g nuts/day) while they supplied between 39%–89% of the New Zealand RDI for Fe. Compared to other commonly eaten tree-nuts New Zealand grown pine nuts are an excellent source of essential minerals. PMID:28239104

  5. Ectomycorrhizal diversity associated with Cedrus deodara and Pinus wallichiana in the Kashmir Himalaya, India.

    Science.gov (United States)

    Itoo, Zahoor Ahmad; Reshi, Zafar A

    2014-01-01

    The present study was undertaken to document the ectomycorrhizal diversity associated with the Cedrus deodara and Pinus wallichiana in the Kashmir Himalaya, India. The extensive field surveys carried out in the Kashmir Himalaya at five study sites resulted in the collection and identification of 76 potential ectomycorrhizal fungal species associated with the Cedrus deodara and Pinus wallichiana. Maximum 32 number of species were found associated with Pinus wallichiana, 19 with Cedrus deodara and 25 species were found growing in association with both the conifers. The present study reveals that Cedrus deodara and Pinus wallichiana in the Kashmir Himalaya, India harbour diverse ectomycorrhizal fungal species.

  6. A Consensus Genetic Map for Pinus taeda and Pinus elliottii and Extent of Linkage Disequilibrium in Two Genotype-Phenotype Discovery Populations of Pinus taeda.

    Science.gov (United States)

    Westbrook, Jared W; Chhatre, Vikram E; Wu, Le-Shin; Chamala, Srikar; Neves, Leandro Gomide; Muñoz, Patricio; Martínez-García, Pedro J; Neale, David B; Kirst, Matias; Mockaitis, Keithanne; Nelson, C Dana; Peter, Gary F; Davis, John M; Echt, Craig S

    2015-06-11

    A consensus genetic map for Pinus taeda (loblolly pine) and Pinus elliottii (slash pine) was constructed by merging three previously published P. taeda maps with a map from a pseudo-backcross between P. elliottii and P. taeda. The consensus map positioned 3856 markers via genotyping of 1251 individuals from four pedigrees. It is the densest linkage map for a conifer to date. Average marker spacing was 0.6 cM and total map length was 2305 cM. Functional predictions of mapped genes were improved by aligning expressed sequence tags used for marker discovery to full-length P. taeda transcripts. Alignments to the P. taeda genome mapped 3305 scaffold sequences onto 12 linkage groups. The consensus genetic map was used to compare the genome-wide linkage disequilibrium in a population of distantly related P. taeda individuals (ADEPT2) used for association genetic studies and a multiple-family pedigree used for genomic selection (CCLONES). The prevalence and extent of LD was greater in CCLONES as compared to ADEPT2; however, extended LD with LGs or between LGs was rare in both populations. The average squared correlations, r(2), between SNP alleles less than 1 cM apart were less than 0.05 in both populations and r(2) did not decay substantially with genetic distance. The consensus map and analysis of linkage disequilibrium establish a foundation for comparative association mapping and genomic selection in P. taeda and P. elliottii. Copyright © 2015 Westbrook et al.

  7. Turismo y Metabolismo Social: Efectos ambientales de la actividad turística en la región Atlántico/Caribe. 1970-2011

    Directory of Open Access Journals (Sweden)

    Edgar Eduardo Blanco Obando

    2015-11-01

    Full Text Available Durante el período de estudio se evidencia que la actividad turística en la región Atlántico/Caribe mantuvo un metabolismo sustentable, debido a condiciones específicas que presentó la expansión del turismo en dicha región.

  8. Vulnerabilidad, pobreza y desastres 'socioculturales' en Centroamérica y El Caribe

    Directory of Open Access Journals (Sweden)

    Salas Serrano, Julián

    2007-12-01

    Full Text Available This paper analyses and quantifies the relative level of risk in a geographical area that is vulnerable to natural phenomena and with a high proportion of its population in a situation of residential poverty. We deduce that the hazard in the area, composed of nine Central American and Caribbean countries, is significantly higher than the world average. The first aspect is covered in the sections Population at risk and Natural phenomena, which analyse the "study area". The second aspect is covered by Poverty in the "study area", various analyses of the physical situation in the target area, inhabited by almost 160 million people. Contrasted information is used as a basis for the concepts underpinning the extraordinary presence and seriousness of the socio-natural phenomena in this area. The interrelationship between th degree of vulnerability and poverty leads to the conclusion that these are the primary causes of disaster-related destruction, which in a 33 year period (1972 to 2005 has left an annual average of 20,000 human lives lost, 250,000 directly affected and approximately ten billion dollars in material damage.El trabajo pretende el estudio y cuantificación del riesgo relativo en una geografía física propensa a los fenómenos naturales y con una alta proporción de población en situación de pobreza habitacional, del que se deduce que el riesgo en la zona conformada por nueve países –de Centroamérica y el Caribe- es extraordinariamente superior a la media mundial. Del primer aspecto se ocupan los apartados relativos a delimitar el 'Área de Estudio': fenómenos naturales y población bajo riesgo. El segundo aspecto se aborda estudiando la situación material objetiva en la que se alojan y viven casi 160 millones de habitantes: Pobreza en el 'Área de Estudio'. En base a información contrastada se articulan los fundamentos en los que se sustenta la extraordinaria presencia y gravedad de los fenómenos 'socionaturales' en la

  9. Identification of pine hybrids using SSR loci.: scientific paper | Doyle ...

    African Journals Online (AJOL)

    We have screened 11 microsatellite markers developed in other Pinus species for their ability to produce fingerprints in the Pinus elliottii x Pinus caribaea hybrid as well as their ability to determine gene flow and parental contribution in this hybrid. We found that cross-species amplification was possible with two thirds of the ...

  10. Southern Forests: a Journal of Forest Science - Vol 196 (2002)

    African Journals Online (AJOL)

    The effect of bottom heat on rooting Pinus patula and Pinus elliotti x Pinus caribaea stem cuttings in South Africa: scientific paper · EMAIL FULL TEXT EMAIL FULL TEXT · DOWNLOAD FULL TEXT DOWNLOAD FULL TEXT. PG Mitchell, 21-26 ...

  11. The spectrum of accidental childhood poisoning in the Caribbean Intoxicaciones infantiles accidentales en el Caribe

    Directory of Open Access Journals (Sweden)

    Thomas C. Martin

    2002-11-01

    incidencia, tipos de sustancias implicadas, edad de los niños y desenlaces clínicos. Los resultados obtenidos en este país se compararon con los de otros estudios realizados en diferentes países caribeños de habla inglesa y en los Estados Unidos de América (EE. UU.. Métodos. Se realizó una revisión retrospectiva de las historias clínicas de todos los pacientes de menos de 13 años de edad ingresados entre marzo de 1989 y marzo de 1999 en la planta de pediatría del Hospital Holberton de Antigua por intoxicación accidental. Los datos obtenidos se compararon con los comunicados en estudios anteriores realizados en Barbados, Guyana, Jamaica y EE. UU. Resultados. Durante este período de 10 años, hubo en Antigua y Barbuda 255 ingresos de niños de menos de 13 años por intoxicación accidental (media de 26 ingresos por año. En una población de aproximadamente 20 000 niños menores de 13 años, esto representa una proporción de 1,3 por 1 000. De estos 255 casos, 115 (45% ocurrieron en niños de 1 año, 69 (27% en niños de 2 años y 26 (10% en niños de 3 años. Esta distribución por edades fue similar a la observada en los demás países. Al comparar los tipos de intoxicación en todos los países estudiados, se verificó que las sustancias implicadas cambiaban a medida que aumentaba el nivel económico: disminuían los hidrocarburos y las plantas y aumentaban los medicamentos y los productos químicos. Conclusiones. A medida que aumenta el nivel económico, también lo hace la complejidad de las sustancias implicadas. Esta tendencia debería llevar al establecimiento de un centro de control de intoxicaciones en los países caribeños de habla inglesa.

  12. First discovery of fossil winged seeds of Pinus L. (family Pinaceae ...

    Indian Academy of Sciences (India)

    Mahasin Ali Khan

    2017-07-04

    Jul 4, 2017 ... In this study,. Pinus arunachalensis sp. nov. is described on the basis of two well preserved winged seeds. The occurrence of winged seeds provides unequivocal evidence that Pinus trees were part of Arunachal. Pradesh flora during the middle to late Miocene. (Dafla Formation). This taxon does not occur.

  13. Influence of gap-scale disturbance on developmental and successional pathways in Quercus-Pinus stands

    Science.gov (United States)

    T.A. Weber; J.L. Hart; C. Schweitzer; D.C. Dey

    2014-01-01

    Quercus-Pinus forests of the eastern USA cover millions of hectares and span a variety of ecoregions. Understanding the influence of natural disturbance on developmental and successional pathways is important for managers that wish to sustain Pinus spp. in these mixtures. Quantifying developmental and successional patterns in this...

  14. Development of site index curves for Pinus kesiya in the Philippines ...

    African Journals Online (AJOL)

    Development of site index curves for Pinus kesiya in the Philippines. RIC Lumbres, YJ Lee, YO Seo, FG Calora JR. Abstract. This study was conducted to develop a height–age growth model and site index curves for site quality evaluation of old secondary-growth stands of Pinus kesiya in the northern Philippines.

  15. Resistance to white pine blister rust in Pinus flexilis and P

    Science.gov (United States)

    Anna W. Schoettle; Richard A. Sniezko; Angelia Kegley; Jerry Hill; Kelly S. Burns

    2010-01-01

    The non-native fungus Cronartium ribicola, that causes white pine blister rust (WPBR), is impacting or threatening limber pine, Pinus flexilis, and Rocky Mountain bristlecone pine, Pinus aristata. In the Southern Rockies, where the rust invasion is still expanding, we have the opportunity to be proactive and prepare the landscape for invasion. Genetic...

  16. Studies on ovulate strobili and seed production of Pinus patula in ...

    African Journals Online (AJOL)

    Studies on ovulate strobili and seed production of Pinus patula in KwaZulu-Natal: scientific paper. ... Southern Forests: a Journal of Forest Science ... Cone and seed production studies in Pinus patula were conducted by the Institute for Commercial Forestry Research (ICFR) in KwaZulu-Natal as part of the improvement ...

  17. Germinación in vitro de Pinus cubensis Griseb

    OpenAIRE

    Raima Cantillo Ardebol; Luis Rodríguez de Francisco; Yamila Rosales; Omar Guadalupe Alvarado

    2006-01-01

    Se hace alusión a la micropropagación de Pinus cubensis, Griseb, como aspecto que satisface la demanda de semillas para la reforestación en áreas de Pinares de Mayarí, hábitat de esta endémica región, amenazada por minería y explotación maderera. Se utilizaron semillas, determinando el mejor método de desinfección, evaluando su germinación en medio con diferentes composiciones de reguladores del crecimiento, y la influencia de la presencia o ausencia de la cubierta seminal. El mejor resultado...

  18. Synthetic seed production from somatic embryos of Pinus radiata.

    Science.gov (United States)

    Aquea, Felipe; Poupin, María Josefina; Matus, José Tomás; Gebauer, Marlene; Medina, Consuelo; Arce-Johnson, Patricio

    2008-10-01

    Pinus radiata is one of the most important forestry species in the southern hemisphere. This work describes the regeneration of this plant via somatic embryogenesis from immature zygotic embryos. To improve this process, somatic embryogenic cell suspensions were established in liquid media for the generation of material for embryo maturation. Each developmental stage of these suspensions was characterized by microscopy and their growth phases quantified. An alginate-containing medium was used as an encapsulation method for the somatic embryos that were then germinated as artificial seeds in vitro. The protocols described in this work are both useful and reliable for industrial purposes.

  19. Pine weevil (Hylobius abietis) antifeedants from lodgepole pine (Pinus contorta).

    Science.gov (United States)

    Bratt, K; Sunnerheim, K; Nordenhem, H; Nordlander, G; Langström, B

    2001-11-01

    Pine weevils (Hylobius abietis) fed less on bark of lodgepole pine (Pinus contorta) than on bark of Scots pine (P. sylvestris). Two pine weevil antifeedants, ethyl trans-cinnamate and ethyl 2,3-dibromo-3-phenyl-propanoate, were isolated from bark of lodgepole pine. These two compounds significantly reduced pine weevil feeding in a laboratory bioassay. In field assays, the second compound significantly decreased pine weevil damage on planted seedlings. Ethyl 2,3-dibromo-3-phenylpropanoate has not previously been reported as a natural product.

  20. Modeling productivity and transpiration of Pinus radiata: climatic effects

    Energy Technology Data Exchange (ETDEWEB)

    Sheriff, D. W.; Mattay, J. P. [Commonwealth Scientific and Industrial Research Organization (CSIRO), Canberra, ACT (Australia). Div. of Forestry and Forest Products; McMurtrie, R. E. [New South Wales Univ., Sydney, NSW (Australia)

    1996-01-01

    Using a process-based forest growth model, BIOMASS, the climatic effect on annual net carbon gain, stem biomass and annual transpiration were simulated for Pinus radiata. Regional variation in climate between Canberra and Mt. Gambier resulted in a 20 per cent difference in simulated annual transpiration rate, but only a relatively small difference in simulated productivity. Simulated carbon gain values averaged about 1.4 per cent; this result was not consistent with the predicted 8 per cent annual carbon assimilation difference between the two sites, based on differences in climate. These results suggest that climatic differences do not account for differences in productivity. 12 refs., 3 tabs., 2 figs.

  1. Genetic diversity and gene exchange in Pinus oocarpa, a Mesoamerican pine with resistance to the pitch canker fungus (Fusarium circinatum)

    Science.gov (United States)

    W.S. Dvorak; K.M. Potter

    2009-01-01

    Eleven highly polymorphic microsatellite markers were used to determine the genetic structure and levels of diversity in 51 natural populations of Pinus oocarpa across its geographic range of 3000 km in Mesoamerica. The study also included 17 populations of Pinus patula and Pinus tecunumanii chosen for their resistance or susceptibility to the pitch canker fungus based...

  2. Reproductive Success and Inbreeding Differ in Fragmented Populations of Pinus rzedowskii and Pinus ayacahuite var. veitchii, Two Endemic Mexican Pines under Threat

    OpenAIRE

    Paty Castilleja Sánchez; Patricia Delgado Valerio; Cuauhtémoc Sáenz-Romero; Yvonne Herrerías Diego

    2016-01-01

    Seed production, quality, germination and seedling establishment are indicators of reproductive success in conifers. Monitoring of these parameters is essential to determine the viability of populations for the purposes of conservation. We analyze cone and seed traits as indicators of reproductive success in the endangered Rzedowski´s pine (Pinus rzedowskii (Madrigal et Caballero) and near-threatened veitchii pine (Pinus ayacahuite var. veitchii (Shaw)) in west-central Michoacán, Mexico. Thes...

  3. Composition and structure of Pinus koraiensis mixed forest respond to spatial climatic changes.

    Directory of Open Access Journals (Sweden)

    Jingli Zhang

    Full Text Available BACKGROUND: Although some studies have indicated that climate changes can affect Pinus koraiensis mixed forest, the responses of composition and structure of Pinus koraiensis mixed forests to climatic changes are unknown and the key climatic factors controlling the composition and structure of Pinus koraiensis mixed forest are uncertain. METHODOLOGY/PRINCIPAL FINDINGS: Field survey was conducted in the natural Pinus koraiensis mixed forests along a latitudinal gradient and an elevational gradient in Northeast China. In order to build the mathematical models for simulating the relationships of compositional and structural attributes of the Pinus koraiensis mixed forest with climatic and non-climatic factors, stepwise linear regression analyses were performed, incorporating 14 dependent variables and the linear and quadratic components of 9 factors. All the selected new models were computed under the +2°C and +10% precipitation and +4°C and +10% precipitation scenarios. The Max Temperature of Warmest Month, Mean Temperature of Warmest Quarter and Precipitation of Wettest Month were observed to be key climatic factors controlling the stand densities and total basal areas of Pinus koraiensis mixed forest. Increased summer temperatures and precipitations strongly enhanced the stand densities and total basal areas of broadleaf trees but had little effect on Pinus koraiensis under the +2°C and +10% precipitation scenario and +4°C and +10% precipitation scenario. CONCLUSIONS/SIGNIFICANCE: These results show that the Max Temperature of Warmest Month, Mean Temperature of Warmest Quarter and Precipitation of Wettest Month are key climatic factors which shape the composition and structure of Pinus koraiensis mixed forest. Although the Pinus koraiensis would persist, the current forests dominated by Pinus koraiensis in the region would all shift and become broadleaf-dominated forests due to the dramatic increase of broadleaf trees under the future global

  4. Composition and structure of Pinus koraiensis mixed forest respond to spatial climatic changes.

    Science.gov (United States)

    Zhang, Jingli; Zhou, Yong; Zhou, Guangsheng; Xiao, Chunwang

    2014-01-01

    Although some studies have indicated that climate changes can affect Pinus koraiensis mixed forest, the responses of composition and structure of Pinus koraiensis mixed forests to climatic changes are unknown and the key climatic factors controlling the composition and structure of Pinus koraiensis mixed forest are uncertain. Field survey was conducted in the natural Pinus koraiensis mixed forests along a latitudinal gradient and an elevational gradient in Northeast China. In order to build the mathematical models for simulating the relationships of compositional and structural attributes of the Pinus koraiensis mixed forest with climatic and non-climatic factors, stepwise linear regression analyses were performed, incorporating 14 dependent variables and the linear and quadratic components of 9 factors. All the selected new models were computed under the +2°C and +10% precipitation and +4°C and +10% precipitation scenarios. The Max Temperature of Warmest Month, Mean Temperature of Warmest Quarter and Precipitation of Wettest Month were observed to be key climatic factors controlling the stand densities and total basal areas of Pinus koraiensis mixed forest. Increased summer temperatures and precipitations strongly enhanced the stand densities and total basal areas of broadleaf trees but had little effect on Pinus koraiensis under the +2°C and +10% precipitation scenario and +4°C and +10% precipitation scenario. These results show that the Max Temperature of Warmest Month, Mean Temperature of Warmest Quarter and Precipitation of Wettest Month are key climatic factors which shape the composition and structure of Pinus koraiensis mixed forest. Although the Pinus koraiensis would persist, the current forests dominated by Pinus koraiensis in the region would all shift and become broadleaf-dominated forests due to the dramatic increase of broadleaf trees under the future global warming and increased precipitation.

  5. EVALUACIÓN CITOTÓXICA DE FRACCIONES OBTENIDAS DE LA ESPONJA MARINA DEL CARIBE COLOMBIANO Topsentia ophiraphidites

    Directory of Open Access Journals (Sweden)

    LINA BLANDÓN

    2013-01-01

    Full Text Available A partir de las esponjas marinas se han obtenido gran cantidad de sustancias con potencial antitumoral. En este estudio se realizó la evaluación de la actividad citotóxica, de cinco  fracciones de la esponja marina del Caribe colombiano Topsentia ophiraphidites en las líneas celulares Jurkat y CHO, mediante las pruebas de MTT y azul de tripano. Sólo la fracción número 4 (T4 presentó actividad citotóxica significativa, obteniendo una concentración inhibitoria media (IC50 de 33 µg/mL para las células Jurkat y 58 µg/mL para las células CHO, sugiriendo la necesidad de realizar posteriores ensayos de genotoxicidad y efectos sobre el ciclo celular.

  6. Huellas de las religiones tradicionales del África subsahariana en América Latina y el Caribe

    Directory of Open Access Journals (Sweden)

    Lazaro Cabrera Thompson

    2008-01-01

    Full Text Available El artículo explora las religiones tradicionales practicadas por los pueblos ewe-mina, ewe-fon, bantú y yoruba del África subsahariana, antes de abordar las formas como estas prácticas religiosas persisten en el “Nuevo Mundo” tras la llegada forzosa de aquellos esclavizados africanos. Con base en la presencia de estas religiones tradicionales africanas en distintos países latinoamericanos y caribeño, se evidencia un conjunto religioso fusionado por historias, mitos, leyendas, danza, música, etc. de ascendencia africana y se hace un llamado a los/ as investigadores/as, que desde América Latina y el Caribe, indagan sobre las religiones tradicionales yoruba, para que franqueen los límites de Nigeria con el fin de abarcar a toda la diáspora yoruba.

  7. Distribución de cangrejos ermitaños (Anomura: Paguroidea en el mar Caribe colombiano

    Directory of Open Access Journals (Sweden)

    Bibian Martínez Campos

    2012-03-01

    Full Text Available Los cangrejos ermitaños son un grupo representativo de la fauna marina del Caribe colombiano, además, son importantes en el mantenimiento del equilibrio dinámico, en los ecosistemas por sus interacciones ecológicas y también por el impacto en la estabilidad de las redes tróficas. Sus patrones de distribución se identificaron mediante análisis multivariados de clasificación y ordenación espacial, se usaron registros históricos desde 1916 hasta el 2006. Los resultados indican diferencias por profundidad entre la fauna costera y la del talud continental y diferencias en la distribución latitudinal, en donde se encontraron tres grupos: Noreste, Centro y Suroeste, sustentados por diferencias en la composición faunística. Con base en los mapas de ecosistemas marinos de Colombia, se determinó que los principales factores que afectan su distribución son la influencia del talud Caribaná (profundidad, la temperatura de las masas de agua, las praderas de pastos marinos de la Guajira y las condiciones particulares de las ecorregiones Archipiélagos coralinos y Darién. Se identificó la distribución mundial de las especies colombianas y su afinidad geográfica, y se encontró mayor afinidad con el Atlántico norte y las Antillas que con el Atlántico sur y el Golfo de México, asimismo, las subprovincias geográficas que incluyen a Colombia son zonas de transición dentro de la subprovincias septentrionales y australes del Gran Caribe

  8. Criptofauna en rocas de Punta Nizuc, Caribe mexicano y su utilidad como biomonitor potencial

    Directory of Open Access Journals (Sweden)

    Concepción Campos-Vázquez

    1999-12-01

    Full Text Available Para completar el diagnóstico de la calidad ambiental en el Parque Marino Nacional Isla Mujeres-Cancún-Nizuc Caribe mexicano, se estudió la posible utilidad de la criptofauna de rocas como monitora de impacto. Se trazó un transecto a lo largo de un gradiente de intensidad de visitantes a Punta Nizuc. Se visitaron tres lugares (1.5-4 m prof., a 50, 250 y 500 m de distancia de la plataforma turistica, y en cada uno de ellos se recogieron tres rocas. Los 1368 organismos encontrados fueron identificados y se distribuyen en 218 especies; los grupos de mayor riqueza específica fueron los poliquetos (64 spp, los moluscos (46 spp y los crustáceos (36 spp. Se estudió la variación en número y en biomasa a lo largo del supuesto gradiente ambiental, y también la relación de algunos descriptores de la comunidad (diversidad, dominancia con la distancia a la plataforma, con la densidad de la roca y con la profundidad. Se analizaron algunos índices que utilizan log10(biomasa + 1 y las curvas de abundancia-biomasa para determinar la calidad del ambiente. Se realizaron análisis de agrupamiento (Bray-Curtis y Jaccard para determinar la afinidad entre estaciones. Para evaluar la funcionalidad de la suficiencia taxonómica en fondos coralinos, se compararon los resultados de dominancia de Berger-Parker para las especies y familias. Las agrupaciones entre las rocas ilustran dos grupos principales, uno formado por las rocas recolectadas cerca de la plataforma (zona perturbada y la otra formada por el resto de las rocas en las áreas con mediano y nulo impacto.To complete the environmental quality assesment of Isla Mujeres-Cancún-Nizuc National Marine Park, the potential of rock cryptofauna as impact monitor was considered. A transect was defined along a visitor intensity gradient and three places (1.5-4 m deep, and 50, 250 and 500 m from the tourist platform; in each. Inte three rocks were collected. The variations in abundance and biomass along an

  9. Flujos de biomasa y estructura de un ecosistema de surgencia tropical en La Guajira, Caribe colombiano

    Directory of Open Access Journals (Sweden)

    Maria Isabel Criales-Hernández

    2006-12-01

    Full Text Available La Guajira es un ecosistema de surgencia explotado en la costa del Caribe colombiano. Con el propósito de integrar la información disponible sobre el sistema se construyó un modelo trófico de 27 grupos funcionales usando el programa Ecopath 5.0 Beta. Se obtuvo una base cuantitativa para compararlo con otros sistemas de surgencia. La Guajira presenta una biomasa total de 68 t/km²/año, la producción primaria neta del sistema es de 1 248.51 t/km²/año y las transferencias totales del sistema son de 3 275 t/km²/año, lo que indica un ecosistema con una surgencia moderada comparada con otros sitios. Las mayores transferencias de energía se dan del nivel trófico I-II (68.93 %, aunque existe una importante proporción de flujos al detritus (32 %. Los resultados en los atributos de madurez del sistema sugieren que La Guajira es un ecosistema inmaduro debido a que la relación P/R excede a 1 y está en desarrollo debido a la baja ascendencia (33.7 % y alta capacidad de desarrollo (66.3 % como ocurre con otras surgencias donde se presentan valores de ascendencia entre 20 % y 35 %. Aunque los datos básicos de entrada en el modelo fueron buenos, gracias a las investigaciones que se han elaborado entre 1995 y 2000, existen algunos grupos donde no se encuentra aún información adecuada; especialmente en los valores de biomasa del fitoplancton, invertebrados, bagres, peces depredadores pelágicos, así como estimaciones de producción en invertebrados, peces depredadores pelágicos y peces pequeños pelágicos. No existe una cuantificación de las poblaciones de mamíferos y aves en el área de estudio, los cuales constituyen depredadores superiores y hacen parte esencial en sistemas de surgenciaBiomass flow and structure of a tropical upwelling ecosystem in La Guajira, Colombian Caribbean. La Guajira is an exploited tropical upwelling ecosystem in the Colombian Caribbean coast. A trophic model of 27 functional groups was constructed using the

  10. Modelagem do crescimento e de biomassa individual de Pinus

    Directory of Open Access Journals (Sweden)

    Ana Beatriz Schikowski

    2013-09-01

    Full Text Available Este estudo tem como objetivo testar modelos matemáticos para estimativas de biomassa de diferentes compartimentos de Pinus spp., a partir de variáveis de fácil mensuração. Os dados utilizados são provenientes de plantios localizados no centro sul do estado do Paraná. Foram utilizados dados de peso seco total e parcial de 35 árvores de Pinus spp., obtidos por meio do método destrutivo direto. De cada árvore amostrada foram medidos também o CAP (circunferência à altura do peito e a altura total. Os modelos para estimativa de biomassa de folhagem não apresentaram bom desempenho, verificado pelos indicadores de ajuste. Entretanto, para os compartimentos: galhos, raízes, casca, fuste e para biomassa total, os ajustes apresentaram elevados valores de R² e baixos valores de Syx%. O modelo de crescimento de Richards obteve melhor desempenho que os demais testados para a estimativa da biomassa total.

  11. The complete plastid genome of Bunge's pine Pinus bungeana (Pinaceae).

    Science.gov (United States)

    Li, Zhong-Hu; Zhu, Juan; Yang, Yi-Xin; Yang, Jie; He, Jing-Wen; Zhao, Gui-Fang

    2016-07-01

    The complete nucleotide sequence of Bunge's pine Pinus bungeana Zucc. ex Endl. chloroplast genome (cp DNA) was determined in this study. The cpDNA was 117 861 bp in length, containing a pair of 475 bp inverted repeat regions (IRa and IRb), which were separated by large and small single copy regions (LSC and SSC) of 65 373 and 51 538 bp, respectively. The cpDNA contained 111 genes, including 71 protein-coding genes (71 PCG species), 4 ribosomal RNA genes (4 rRNA species) and 36 tRNA genes (32 tRNA species). In these genes, 13 harbored a single intron and 1 (ycf3) contained a couple of introns. The overall AT content of Bunge's pine cpDNA is 61.2%, while the corresponding values of the LSC, SSC and IR regions are 61.9%, 60.2% and 62.5%, respectively. A phylogenetic reconstruction based on the maximum parsimony analysis suggested that all the sampled Pinus species clustered a monophyletic clade and have a high bootstrap support, and the cpDNA of P. bungeana is closely related to that of congeneric P. gerardiana.

  12. Emerging Needle Blight Diseases in Atlantic Pinus Ecosystems of Spain

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    Esther Ortíz de Urbina

    2016-12-01

    Full Text Available Red band needle blight caused by Dothistroma septosporum and D. pini, and brown spot needle blight caused by Lecanosticta acicola provoke severe and premature defoliation in Pinus, and subsequent reduction of photosynthetic surfaces, vitality, and growth in young and adult trees. The recurrent damage results in branch and tree death. Until recently, pine needle blight diseases have had only minor impacts on native and exotic forest trees in the North of Spain, but in the past five years, these pathogen species have spread widely and caused severe defoliation and mortality in exotic and native plantations of Pinus in locations where they were not detected before. In an attempt to understand the main causes of this outbreak and to define the effectiveness of owners’ management strategies, four research actions were implemented: a survey of the management activities implemented by the owners to reduce disease impact, the evaluation of specific symptoms and damage associated with infection, and the identification of the causative pathogenic species and their reproductive capacity. Morphological characteristics of the fungus and molecular identification were consistent with those of Lecanosticta acicola and Dothistroma spp., D. septosporum, D. Pini, and both mating types were present for the three identified pathogens. The local silvicultural management performed, mainly pruning and thinning, was not resulting in the expected improvement. The results of this study can be applied to establish guidelines for monitoring and controlling the spread of needle blight pathogens.

  13. Origin and structure of Ubisch bodies in Pinus sylvestris

    Directory of Open Access Journals (Sweden)

    John R. Rowley

    2014-01-01

    Full Text Available In Pinus sylvestris Ubisch bodies are produced repeatedly, and each crop is formed at a distinct phase in the secretory cycles of tapetal cells. While each production has a Ubisch body wall similar to the then current state of the exine with regard to thickening and ornamentation, the survivers of previous productions do not change. Examples of all the structurally different Ubisch body wall forms can be seen when terminally, at the time of pollen shedding, the relict Ubisch bodies become spatially concentrated on the minimal surface area of the senescent cells of the tapetum. In angiosperms after one or a few periods of initiation Ubisch bodies may remain in association with the surface of tapetal cells where the Ubisch body wall undergoes changes like those of the maturing pollen exine. We conclude that as a consequence of Ubisch body detachment from the plasma membrane of tapetal cells there is in Pinus sylvestris no updated information for modification of the wall and the Ubisch body wall remains static.

  14. A Associação dos Estados do Caribe: Política Intrarregional e Cenários Prospectivos

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    Carlos Federico Domínguez Avila

    2016-11-01

    Full Text Available Resumo O artigo explora a evolução recente da Associação dos Estados do Caribe, organização intergovernamental criada em 1994, pelos representantes de 25 Estados ribeirinhos da bacia caribenha. Trata-se de uma organização orientada a promover o desenvolvimento econômico, especialmente as trocas comerciais, a infraestrutura, e o turismo. Metodologicamente, a pesquisa é resultado de análise documental e de política comparada. Palavras-chave: Associação dos Estados do Caribe; Integração regional; Desenvolvimento Econômico; América Latina. The Association of Caribbean States: Intraregional Policy and Prospective Scenarios Abstract The paper explores the recent evolution of the Association of Caribbean States, an intergovernmental organization created in 1994, by delegates from 25 Caribbean states. The main goals of this international organization are oriented to promote economic development, especially trade, invests, infrastructure, and tourism. From a methodological perspective, the paper was made with documental analysis and comparative politics. Key-words: Association of Caribbean States; Regional Integration; Economic Development; Latin America. La Asociación de los Estados del Caribe: política intrarregional y escenarios prospectivos Resumen El artículo explora la evolución reciente de la Asociación de Estados del Caribe, una organización intergubernamental creada en 1994, por representantes de 25 Estados ribereños de la cuenca caribeña. La AEC es una organización orientada a promover el desarrollo económico, especialmente el intercambio comercial, la infraestructura y el turismo. Metodológicamente, la investigación es resulta de análisis documental y políticas comparadas. Palabras-clave: Asociación de Estados del Caribe; Integración Regional; Desarrollo Económico; América Latina.

  15. Factors Affecting Growth of Pinus radiata in Chile

    Science.gov (United States)

    Alvarez-Munoz, Jose Santos

    The Chilean forestry industry is based on hundreds of thousands of hectares of Pinus radiata plantations that have been established in a variety of soil and climate conditions. This approach has resulted in highly variable plantation productivity even when the best available technology was used. Little information is known about the ecophysiology basis for this variability. We explored the spatial and temporal variation of stand growth in Chile using a network of permanent sample plots from Modelo Nacional de Simulacion de Pino radiata. We hypothesized that the climate would play an important role in the annual variations in productivity. To answer these questions we developed the following projects: (1) Determination of site resource availability from historical data from automatic weather stations (rainfall, temperatures) and a geophysical model for solar irradiation, (2) Determination of peak annual leaf area index (LAI) for selected permanent sample plots using remote sensing technologies, (3) Analysis of soil, climate, canopy and stand factors affecting the Pinus radiata plantation growth and the use efficiency of site resources. For project 1, we estimated solar irradiation using the r.sun , Hargreaves-Samani (HS), and Bristow-Campbell (BC) models and validated model estimates with observations from weather stations. Estimations from a calibrated r.sun model accounted for 94% of the variance (r2=0.94) in monthly mean measured values. The r.sun model performed quite well for a wide range of Chilean conditions when compared with the HS and BC models. Our estimates of global irradiation may be improved with better estimates of cloudiness as they become available. Our model was able to provide spatial estimates of daily, weekly, monthly and yearly solar irradiation. For project 2, we estimated the inter-annual variation of LAI (Leaf Area Index), using remote sensing technologies. We determined LAI using Landsat Thematic Mapper (TM) data covering a 5 year period

  16. Bleached kraft pulp production from Pinus tecunumanii (Eguiluz e Perry Produção de polpa kraft branqueada de Pinus tecunumanii (Eguiluz e Perry

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    Leonel F. Torres

    2005-06-01

    Full Text Available The use of 12-year-old Pinus tecunumanii (Eguiluz e Perry grown in Colombia was evaluated for bleached kraft pulp production. Kraft pulps of kappa number 30 ± 1 were produced, and oxygen delignified and bleached to 90% ISO with ECF processes. The bleached pulps produced under optimum conditions were evaluated with regard to their strength properties. Pinus tecunumanii wood required low effective alkali charge to reach the desired kappa number and the unbleached pulp showed high oxygen delignification efficiency and bleachability when a OD(EODED sequence was used. The bleached pulps presented good physical-mechanical properties, which are comparable to those obtained with more traditional pines such as Pinus taeda and Pinus radiata. The results demonstrate that this tropical pine species is a suitable raw material for bleached kraft pulp productionForam avaliadas amostras de Pinus tecunumanii de (Eguiluz e Perry com 12 anos de idade procedente da Colômbia, para produção de polpa de kraft branqueada. Produziram-se polpas kraft com número kappa 30±1, deslignificada com oxigênio e branqueada a 90% ISO por processo ECF. As polpas branqueadas foram produzidas em condições ótimas e avaliadas com relação às suas propriedades de resistência. A madeira de Pinus tecunumanii exigiu baixa carga de álcali efetivo para alcançar o número kappa desejado, e a polpa marrom mostrou eficiência na deslignificação com oxigênio e alta branqueabilidade quando submetida à seqüência OD(EODED. As polpas branqueadas apresentaram boas propriedades físico-mecânicas, em comparação com aquelas obtidas das espécies tradicionais de Pinus, como o Pinus taeda e o Pinus radiata. Os resultados indicaram que essa espécie de pinus tropical é uma matéria-prima satisfatória para produção de polpa de kraft branqueada.

  17. Impact of solar activity on growth of pine trees (Pinus cembra: 1610 - 1970; Pinus pinaster: 1910 -1989)

    Science.gov (United States)

    Surový, P.; Dorotovič, I.; Karlovský, V.; Rodrigues, J. C.; Rybanský, M.; Fleischer, P.

    2010-12-01

    In this work we have focused on the analysis of the data on the annual growth of cembra pine (Pinus cembra) grown in the Kôprová dolina Valley in the High Tatra Mountains. The database covers the period of 1406 - 1970, however, the sunspot data (minima and maxima) at the NGDC web site are only available since 1610. Moreover, reliable sunspot data are only available since 1749. The results of this analysis agree with the observation made in our previous work, i.e. there is a negative impact of high SA on the pine tree growth. However, it should be noted that statistical significance of the results is low. We also applied wavelet analysis to the data on the tree growth evolution, with the results indicating growth variations' period of about 20 years (duration of approximately two solar cycles or one magnetic cycle, respectively). A negative impact of the SA was also observed in growth of a 90 year-old maritime pine tree (Pinus pinaster) grown in northern Portugal. The width of the annual rings was smaller in the years of maximum SA; furthermore, it was found that it is the latewood growth that it is affected while the earlywood growth is not, and consequently the latewood additions also show a significative negative correlation with SA.

  18. Chemical composition, antimicrobial, insecticidal, phytotoxic and antioxidant activities of Mediterranean Pinus brutia and Pinus pinea resin essential oils.

    Science.gov (United States)

    Ulukanli, Zeynep; Karabörklü, Salih; Bozok, Fuat; Ates, Burhan; Erdogan, Selim; Cenet, Menderes; Karaaslan, Merve Göksin

    2014-12-01

    Essential oils of the resins of Pinus brutia and Pinus pinea were evaluated for their biological potential. Essential oils were characterized using GC-MS and GC/FID. in vitro antimicrobial, phytotoxic, antioxidant, and insecticidal activities were carried out using the direct contact and the fumigant assays, respectively. The chemical profile of the essential oils of the resins of P. pinea and P. brutia included mainly α-pinene (21.39% and 25.40%), β-pinene (9.68% and 9.69%), and caryophyllene (9.12% and 4.81%). The essential oils of P. pinea and P. brutia exerted notable antimicrobial activities on Micrococcus luteus and Bacillus subtilis, insecticidal activities on Ephestia kuehniella eggs, phytotoxic activities on Lactuca sativa, Lepidium sativum, and Portulaca oleracea, as well as antioxidant potential. Indications of the biological activities of the essential oils suggest their use in the formulation of ecofriendly and biocompatible pharmaceuticals. Copyright © 2014 China Pharmaceutical University. Published by Elsevier B.V. All rights reserved.

  19. Characterization of Phenolic Compounds in Pinus laricio Needles and Their Responses to Prescribed Burnings

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    Lila Ferrat

    2007-07-01

    Full Text Available Fire is a dominant ecological factor in Mediterranean-type ecosystems. Management strategies include prescribed (controlled burning, which has been used in the management of several species, such as Pinus nigra ssp laricio var. Corsicana, a pine endemic to Corsica of great ecological and economic importance. The effects of prescribed burning on Pinus laricio have been little studied. The first aim of this study was to characterize total and simple phenolic compounds in Pinus laricio. The second aim was to understand: i the short term (one to three months and medium term (three years effects of prescribed burning, and ii the effects of periodic prescribed burning on the production of phenolic compounds in Pinus laricio. The first result of this study is the presence of total and simple phenolic compounds in the needles of Pinus laricio. 3-Vanillyl propanol is the major compound. After a prescribed burning, the synthesis of total phenolic compounds increases in Pinus laricio for a period of three months. Total phenolic compounds could be used as bioindicators for the short-term response of Pinus laricio needles to prescribed burning. Simple phenolic compounds do not seem to be good indicators of the impact of prescribed burning because prescribed burnings are low in intensity.

  20. El Caribe a comienzos del siglo XXI : composición étnica y diversidad lingüística

    OpenAIRE

    Lizcano Fernández, Francisco

    2014-01-01

    La conclusión principal de este trabajo es que el Caribe, integrado por 29 entidades políticas, se debe dividir en dos regiones: la española y la germano‐francesa (integrada por tres subregiones: los Caribes inglés, francés y neerlandés). La primera (compuesta de Cuba, Puerto Rico y República Dominicana) pertenece a un área cultural más extensa, Iberoamérica. La segunda (integrada por el resto de las islas situadas entre Norteamérica y Sudamérica, así como por Bermudas y las tres Guayanas) co...

  1. PROCESOS DE INTEGRACIÓN EN AMÉRICA LATINA Y EL CARIBE: CARACTERIZACIÓN GENERAL Y POTENCIALIDAD DE NUEVOS EJES DE INTEGRACIÓN

    Directory of Open Access Journals (Sweden)

    Giovanni Reyes

    2007-07-01

    Full Text Available Este documento presenta y discute lo que se consideran son los aspectos principales referentes a los diferentes tratados de integración, vigentes en América Latina y el Caribe. En la primera sección se expone una comparación sobre crecimiento económico entre América Latina y el Caribe, India y China. A continuación se discute con mayor detalle, en una segunda sección, características propias en un sentido de historia inmediata, sobre desempeño de los principales acuerdos comerciales en la región, incluyendo montos de comercio, calidad del mismo, y coeficientes de concentración de exportaciones hacia el mercado estadounidense. Finalmente, se presentan elementos de lo que podría ser una nueva modalidad de integración regional, basada en proyectos específicos.

  2. La construcción del área cultural caribeña: los aportes de Édouard Glissant a partir de Le discours antillais

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    Carolina Sancholuz

    2002-11-01

    martiniqueño Édouard Glissant en la construcción de la compleja área caribeña, caracterizada particularmente por su heterogeneidad, multiplicidad étnica, lingüística, religiosa, cultural, por sus complicados procesos de hibridaciones, transplantes, transculturaciones. El área Caribe, idea que recién comienza a imponerse a partir de los años sesenta del siglo XX, en tanto integración de América Latina y el Caribe, permite observar de un modo intenso y problemático procesos y realidades vividos por toda América Latina, como las luchas de la conquista, colonización, descolonización, neocolonialismos. En este sentido resultan particularmente interesantes los aportes de Glissant, quien ha reflexionado especialmente en su enorme ensayo Le discours antillais sobre, entre varios aspectos, la antillanidad, la negritud, la criollización, las relaciones entre oralidad y escritura, la memoria, las diásporas, las mezclas lingüísticas, para intentar aproximarse a la complejidad de lo diverso antillano a partir de su perspectiva de la “poética de la relación”. Las ideas de Glissant promueven un pensamiento de archipiélago, abierto al cambio, a múltiples posibilidades combinatorias que impiden el riesgo de solidificar construcciones identitarias en un áreatan particular como la caribeña, cuya constante es,por el contrario, la mutación, la fragilidad, la inestabilidad.

  3. Primer registro del tiburón mako Isurus oxyrinchus (Lamniformes: Lamnidae en la costa de La Media Guajira, Caribe colombiano

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    Paola Palacios-Barreto

    2014-11-01

    Full Text Available Se registra la presencia del tiburón mako Isurus oxyrinchus, capturado por pescadores artesanales con palangre tiburonero frente a la costa de La Media Guajira. Constituye el primer registro de I. oxyrinchus para esta zona costera, con lo cual se amplía su distribución geográfica a la zona costera del mar Caribe colombiano.

  4. El acaparamiento de tierras en América Latina y el Caribe visto desde una perspectiva internacional más amplia

    NARCIS (Netherlands)

    S.M. Borras jr. (Saturnino); J.C. Franco (Jennifer); C. Kay (Cristóbal); M. Spoor (Monique)

    2012-01-01

    markdownabstractEste volumen continúa la discusión surgida de los antecedentes recogidos en la investigación presentada en el libro “Dinámicas del mercado de la tierra en América Latina y el Caribe: concentración y extranjerización”, publicado por la Oficina Regional de la FAO en junio de

  5. Pinus x rhaetica Brugger, nuevo taxón para la Comunidad Valenciana

    OpenAIRE

    González López, Emilio; Olivares Tormo, Amparo; Laguna Lumbreras, Emilio

    2005-01-01

    Se corrobora la presencia en la provincia de Valencia de ejemplares con caracteres transitorios entre Pinus uncinata Ramond ex DC y P. sylvestris L., que inicialmente atribuimos al híbrido Pinus × rhaetica Brügger. Las plantas se sitúan enclaves cercanos a la cima del Alto de las Barracas o Calderón (1839 m, Puebla de San Miguel) el monte más elevado del territorio valenciano, de donde ya existían referencias verbales no contrastadas que apuntaban a la posible presencia de Pinus uncinata Ramo...

  6. Condicionantes del turismo sustentable en el caribe mexicano Conditions of sustainable tourism on the Caribbean coast of Mexico Les conditions du tourisme soutenable sur la côté caribéenne du Mexique.

    Directory of Open Access Journals (Sweden)

    Rosalía Gómez Uzeta

    2011-09-01

    Full Text Available La concurrence internationale sur le marché touristique a des effets négative sur le comportement des flux touristiques américains sur les rivages caribéens du Mexique. La massification des flux a mis en évidence les limites du modèle traditionnel basé sur l'offre « soleil et plage  » commune à l’ensemble de l’espace carïbéen. Pour cette raison, il est nécessaire de repenser de nouvelles façons de soutenir le développement du tourisme, de la décentralisation des fonctions politiques et administratives des trois paliers de gouvernement, et de chercher à renforcer les synergies régionales pour renforcer les possibilités de diversification du développement autour de nouvelles attractions et offres provenant des marchés locaux.Cette stratégie permettra de promouvoir la durabilité de l'économie régionale et d'État et de consolider un projet de développement viable à long terme.The competition on the international tourism market has negative effects on the behavior of American’ tourist flows on the Caribbean coast of Mexico. The mass flows has highlighted the limitations of traditional model based on the offer "sun and beach" common throughout the Caribbean area. For this reason, we need to rethink new ways to support development tourism, the decentralization of political and administrative functions of the three levels of government, and seek to strengthen regional synergies to enhance diversification opportunities around the development of new attractions and offers from local markets.This strategy will promote the sustainability of the regional economy and state and consolidate a sustainable development project in the long term.Existen condiciones de competencia internacional que han afectado negativamente el comportamiento del flujo turístico norteamericano al Caribe Mexicano, ello ha puesto en evidencia la vulnerabilidad del modelo tradicional basado en la oferta de “sol y playa”, que se ha agrava en la

  7. Los peces Gobiidae de los arrecifes del Caribe Colombiano. IV. el género Lythrypnus Los peces Gobiidae de los arrecifes del Caribe Colombiano. IV. el género Lythrypnus

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    Garzón Ferreira Jaime

    1992-09-01

    Full Text Available Descriptive and ecological information about seven species of the genus Lythrypnus (Pisces: Gobiidae, based on collections done in six coralline areas along the Colombian Caribbean to 50 m deep, is included; a key to aid in species identification is provided. Two of the species turned out to be new for science: the pigmy goby L. minimus, recently descrited and common only at Rosario and San Bernardo islands, was collected between 1 and 20 m and may be the smallest known vertebrate; Lythrypnus sp., usually misidentified as L. crocodilus and soon to be named, was found between 3 and 18 m and is common at several Caribbean localities (but absent from Rosario and San Bernardo islands. The bluegold goby L. spilus was the most frequent in all the Colombian Caribbean (32% of the samples and was collected between 4 and 40 m; the okapi goby L. okapia was registered for a sole specimen got at the Santa Marta region at 7 m. The island goby L. nesiotes inhabits coralline bottoms over 10 m and was the only species collected also in turbid waters without corals; on the other hand, the dwarf goby L. elasson appears only below 10-40 m deep and was the second species in frequency (26%. The disphasic goby L. heterochroma is another rare form; it was collected in Rosario and Providencia islands between 4 and 8 m. Bahía de Portete was the only explored area where no Lythrypnus species has been found. Se incluye información descriptiva y ecológica de siete especies del género Lythrypnus (Pisces: Gobiidae, con base en colecciones realizadas en seis áreas coralinas a lo largo del Caribe Colombiano, hasta 50 m de profundidad. Se presenta además una clave para identificar dichas especies, de las cuales dos resultaron nuevas para la ciencia: L. minimus, descrita recientemente y común sólo en el sector de las Islas del Rosario y de San Bernardo, se colectó entre 1 y 20 m y es tal vez el vertebrado más pequeño del mundo; y Lythrypnus sp., que ha sido confundida

  8. producción bibliométrica y redes de cooperación en la revista psicología desde el caribe

    Directory of Open Access Journals (Sweden)

    José Hernando Ávila-Toscano

    2016-01-01

    Full Text Available En este artículo se presentan resultados de un estudio cuyo objetivo se centró en el análisis de los indicadores bibliométricos y las redes de colaboración en la revista de psicología más representativa del Caribe colombiano (Psicología desde el Caribe durante el período 2009- 2013. Tras el análisis de 12 números, los resultados demuestran la importancia otorgada al trabajo colaborativo, que se evidencia en un elevado porcentaje de textos escritos por varios autores (83.2 %, que particularmente proceden de instituciones colombianas, que prefieren el trabajo conjunto con los de España, México y Estados Unidos. La revista también so- bresale como un órgano de la preferencia para una red importante de autores de Brasil. En los artículos publicados destacan las investigaciones de tipo aplicado y de temáticas clínicas y sociales, como las de mayor preferencia por parte de los articulistas. Psicología desde el Caribe se perfila como un órgano de difusión esencialmente en español, que parece gozar del crédito y la confianza de autores de todo el continente Americano y España.

  9. Culturas migratorias en el Caribe colombiano: El caso de los isleños raizales de las islas de Old Providence y Santa Catalina

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    Ana Isabel Márquez Pérez

    2013-01-01

    Full Text Available Las migraciones caribeñas han sido ampliamente documentadas, especialmente desde visiones económicas y demográficas que enfatizan los aspectos negativos que estas causan en individuos y sociedades. Sin embargo, desde las ciencias humanas se ha difundido el concepto de culturas migratorias para analizarlas . El eje central es que, más allá de un fenómeno de tipo económico, ligado a superpoblación y desempleo , la movilidad caribeña puede entenderse como una tradición cultural que se ha convertido en un modo de vida legitimado por generaciones de migrantes, permitiendo la viabilidad de estas sociedades. Este concepto supone la movilidad constante a manera de migraciones temporales utilizadas como estrategias económicas básicas, así como mecanismos socioculturales que facilitan y perpetúan esta práctica. Este seria el caso de los habitantes de Providencia y Santa Catalina en el territorio de habla inglesa en el Caribe colombiano, quienes poseen una larga historia de migraciones que continúan hasta hoy y que constituyen una forma de vida. Este documento resulta de investigaciones realizadas tanto en las islas como con migrantes en Bogotá, entre 2004 y 2011, en las cuales se abordaron diversos temas, incluyendo el papel de las migraciones en la vida de estos isleños, las memorias y las percepciones sobre las mismas.

  10. Las otras caras del paraíso: veinte años en la historiografía del turismo en el Caribe, 1993 - 2013

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    Orlando Deavila Pertuz

    2014-01-01

    Full Text Available Este ensayo historiográfico analiza la evolución en el estudio del desarrollo histórico del turismo en el Caribe, cuáles han sido sus debates, perspectivas temáticas, aproximaciones metodológicas, y bases teóricas en los últimos veinte años. El articulo su giere que han sido cinco los temas que han marcado esta trayectoria historiográfica: el estudio del turismo desde sus implicaciones económicas, políticas y sociales (y desde la comparación con el sistema de plantación, desde la perspectiva de género y la sexualidad (y en particular desde la dominación del cuerpo de la mujer caribeña afrodescendiente, desde las relaciones socio - raciales derivadas del encuentro turístico, desde su dimensión simbólica y/o imaginaria, y desde la relación histórica entre el tu rismo y los distintos poderes imperiales que se han establecido en la región. A pesar de la rica trayectoria en el estudio del tema, sus logros no se han extendido al Caribe continental.

  11. Radiation induced pollen tube growth stimulation of Pinus silvestris

    International Nuclear Information System (INIS)

    Zelles, L.; Seibold, H.W.

    1976-01-01

    Pollen grains of Pinus silvestris were irradiated with different quantum energies (30 and 300 kV X-ray, Cobalt-60γ-ray and UV-light of 240, 260 and 280 nm) of radiation and at different dose rates. A stimulatory effect on tube growth induced by ionizing radiation as well as UV-light was obtained by using suitable doses at appropriate dose rates. The stimulatory effect induced by UV-light and by ionizing radiation, occurred between 5000 and 400,000 erg/cm 2 at the dose rate of 40 and 250 erg/cm 2 sec and between 200 and 2000 rad at dose rates of 20 and 50 rad/sec, respectively. UV-light at 240 nm did not stimulate the pollen tube growth in contrast to UV-light of 260 and 280 nm. This suggests, that nucleic acid- and protein-like substances may be involved in the stimulation mechanism. (author)

  12. Protein synthesis in the embryo of Pinus thunbergii seed, 2

    International Nuclear Information System (INIS)

    Yamamoto, Naoaki; Sasaki, Satohiko.

    1977-01-01

    14 C-Amino acid incorporating activity in the absence of exogenous mRNA was found in a cell-free system from embryos of light-germinated Pinus thunbergii seeds, but not in that from dark-imbibed seed embryos. Template activity in the cell-free system from the light-germinated seed embryos was observed in the ribosome fraction, especially the polyribosome fraction, but not in the 100,000 x g supernatant fraction (s100). These facts suggest that the nature of the block in protein synthesis during the imbibition of seeds in the dark is due to the lack or inactivity of mRNA. The s100 from light-germinated seed embryos was found to be less active in amino acid incorporation than that from dark-imbibed seed embryos. (auth.)

  13. ESTABLISHMENT OF Pinus elliottii Engelm STANDS WITH DIRECT FIELD SOWING

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    César Augusto Guimarães Finger

    2010-08-01

    Full Text Available This experiment was undertaken to test the possibility of use of direct field sowing as a method of  forest formation. The soil preparation consisted of mechanic mowing followed by cleaning of small circles of 40 cm of diameter, where four seeds of Pinus elliottii Engelm were sowed, previously stratified, and protected by a bottomless plastic glass fastened to the sowing point. The treatments tested were direct sowing, sowing of seeds involved by paper envelop and seedling plantation as testify treatment. The results were not satisfactory, however, being observed at the most 38.46% of the sowing places with seedlings after 84 days of sowing. The main factor that contribuited to the failure of the method was seedling mortality caused by water deficit and high temperatures.

  14. Needles of Pinus halepensis as biomonitors of bioaerosol emissions.

    Directory of Open Access Journals (Sweden)

    Amandine Galès

    Full Text Available We propose using the surface of pine trees needles to biomonitor the bioaerosol emissions at a composting plant. Measurements were based on 16S rRNA gene copy numbers of Saccharopolyspora rectivirgula, a bioindicator of composting plant emissions. A sampling plan was established based on 29 samples around the emission source. The abundance of 16S rRNA gene copies of S. rectivirgula per gram of Pinus halepensis needles varied from 104 to 102 as a function of the distance. The signal reached the background level at distances around the composting plant ranging from 2 km to more than 5.4 km, depending on the local topography and average wind directions. From these values, the impacted area around the source of bioaerosols was mapped.

  15. NUTRIENTS CONCENTRATION AND RETRANSLOCATION IN THE Pinus taeda L. NEEDLES

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    Márcio Viera

    2010-03-01

    Full Text Available Aiming at evaluating nutrients concentration and retranslocation in the Pinus taeda L. needles, this study was developed in two stands, in native grass area and in second rotation area, with same species and same age (7.5 years old in Cambará do Sul, RS. The needles were collected in plants in four orthogonal points (South, North, East and West, sampled new needles, mature needles and old needles. The material was dried in a stove, milled and chemically analyzed (macro and micronutrients. The concentrations of N, P, K, B, Cu and Zn had decreased, of Ca, Fe and Mn increased, and the Mg and S have remained constant with the age of the needles. The retranslocation rate (old-new needles was more than 50% for most nutrients, except for Mn and Fe, showed that cumulative effect and the Ca reference element.

  16. Effect of two culture media on Pinus taeda shoots elongation

    Directory of Open Access Journals (Sweden)

    Luciana Paula Imbrogno

    2013-07-01

    Full Text Available Pinus taeda L. is a forest species of great international importance and in Argentina. Biotechnological techniques can provide an alternative to propagate this species, as well as for obtaining mother plants. The aim of this study was to achieve adequate elongation of in vitro shoots before transfer to the rooting stage. The shoots were obtained from acclimatized mother plants. It was disinfected for in vitro establishment. Two types of basal culture media: WV5 and DCR were studied. The best results were achieved with the combination of the WV5 salts supplement with 0.5% activated carbon, 0.01 mg l-1 ANA to obtain vigorous and longer than 40.0 mm in length shoots. Key words: forest, micropropagation, pine

  17. [Pinus koraiensis seed consumption by rodents and birds].

    Science.gov (United States)

    Yao, Xiao-lin; Piao, Zheng-ji; Li, Bu-hang; Zhang, Jian; Wang, Xu-gao; Ye, Ji; Hao, Zhan-qing

    2008-08-01

    An investigation from 2006 to 2007 was made on the Pinus koraiensis seed consumption by rodents and birds in the broad-leaved P. koraiensis mixed forest and birch forest at the same altitude in Changbai Mountains. The results showed that in broad-leaved P. koraiensis mixed forest, rodents consumed more pinecone seeds than birds; while in birch forest, birds did more than rodents. In the two forests, the total number of pinecone seeds consumed by rodents was significantly higher than that consumed by birds (P < 0.01). In addition, rodents consumed more embedded seeds in broad-leaved P. koraiensis mixed forest than in birch forest, and the consumption amount in the two forests decreased with increasing embedded depth.

  18. Green Synthesis of Silver Nanoparticles Using Pinus eldarica Bark Extract

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    Siavash Iravani

    2013-01-01

    Full Text Available Recently, development of reliable experimental protocols for synthesis of metal nanoparticles with desired morphologies and sizes has become a major focus of researchers. Green synthesis of metal nanoparticles using organisms has emerged as a nontoxic and ecofriendly method for synthesis of metal nanoparticles. The objectives of this study were production of silver nanoparticles using Pinus eldarica bark extract and optimization of the biosynthesis process. The effects of quantity of extract, substrate concentration, temperature, and pH on the formation of silver nanoparticles are studied. TEM images showed that biosynthesized silver nanoparticles (approximately in the range of 10–40 nm were predominantly spherical in shape. The preparation of nano-structured silver particles using P. eldarica bark extract provides an environmentally friendly option, as compared to currently available chemical and/or physical methods.

  19. Estudio hidroclimático de la región del Caribe, Norte colombiano

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    1977-01-01

    Full Text Available L'étude hydro-climatique de la région de la plaine des Caraïbes (Nord Colombien présente deux caractéristiques principales quant à ses objectifs et à la méthode employée: travailler dans le sens d'une climatologie plus globale, faisant appel à des variables et aspects climatiques peu connus ou peu utilisés en Colombie, mais présenter aussi une étude qui puisse servir de base à une planification régionale agricole. C'est pour cette raison que l'on a insisté sur la cartographie d'éléments agro-climatiques comme les pluies d'hiver, les besoins en eau d'irrigation et les relations complexes de l'évapotranspiration comme expression numérique de la sécheresse. La partie cartographique a particulièrement été soignée selon des techniques en partie empruntées à l'école de Grenoble mais adaptées au milieu tropical. L'article ci-après se veut essentiellement une présentation rapide des trois cartes en annexe: la carte pluviothermique, la carte des régimes et fréquences pluviométriques et celle de l'évapotranspiration et des bilans hydriques. Enfin la comparaison des trois documents permet l'ébauche d'une synthèse climatique qui classe le Nord colombien en dix régions aux conditions climatiques propres pouvant servir de base à l'étude du milieu naturel et de l'écologie de l'espace étudié. El estudio hidroclimático de la región del Caribe (Norte colombiano presenta dos características principales en cuanto a sus objetivos y el método empleado. Es un trabajo en el sentido de una climatología más global, tratando variables y aspectos climáticos poco conocidos o poco utilizados en Colombia: también es un trabajo que se quiere aplicado para servir a un ordenamiento regional agrícola. Por esta razón, el estudio enfoca la cartografía de elementos agroclimáticos como son las lluvias de invierno, los requerimientos en agua de riego y las relaciones complejas de evapotranspiración como expresión numérica de la

  20. Prospects for the biological control of invasive Pinus species (Pinaceae) in South Africa

    CSIR Research Space (South Africa)

    Hoffmann, JH

    2011-09-01

    Full Text Available Nine Pinus species (Pinaceae) have become invasive plants in South Africa after being deliberately introduced and cultivated in commercial forests, for timber. A proposal to use biological control to contain the problem raised concerns among...

  1. Effects of ammonium and nitrate on mycorrhizal seedlings of Pinus sylvestris.

    NARCIS (Netherlands)

    Termorshuizen, A.J.; Ket, P.C.

    1991-01-01

    The effects of ammonium sulphate and sodium nitrate on Pinus sylvestris seedlings inoculated with Paxillus involutus and Suillus bovinus were investigated. Weekly fertilization (26 weeks) positively affected the plant dry weight, but inhibited the mycorrhizal formation and decreased the root

  2. Poder y ordenamiento espacial en la Costa Caribe colombiana: Patrones de asentamiento en el Partido de Cartagena (Tierradentro- Provincia de Cartagena de Indias, siglos XVI - XVII

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    Camilo Díaz Pardo

    2007-01-01

    Full Text Available En la literatura histórica colombiana y caribeña se ha dado un fuerte acento en el papel que jugaron las ciudades y las regiones que emergieron de ellas en ola formación la moderna cultura caribeña. En la arqueología el énfasis se ha limitado a analizar procesos prehispánicos adaptativos a condiciones cambiantes del medio ambiente dejando de manera tacita fuera de foco la discusión de las consecuencias sociales y culturales de la conquista y la colonia y su impacto en el tejido social que surgiría a finales del siglo XVI. Estas delimitaciones disciplinarias se han convertido en un obstáculo para el conocimiento e interpretación de las dinámicas que siguieron al impulso inicial de la colonización del litoral caribeño y la bien conocida fundación de los centros militares y administrativos. Consecuentemente los historiadores han ignorado en gran parte el papel de las poblaciones aborígenes en la formación de los asentamientos al interior de la llanura costera a pesar que es un hecho bien conocido que no desaparecieron completamente después del siglo XVI. A pesar de que han existido intentos de sintetizar y complementar la información histórica con datos arqueológicos especialmente en los últimos diez años no hemos asistido a un evaluación del campo que consideramos de la mayor importancia para entender la estrategias a traves de las cuales las comunidades aborígenes y algo mas tarde las comunidades de composición mixta africano-indígena y mestizas establecieron exitosamente una serie de asentamientos fuera del sistema colonial reinante. El análisis de los patrones de asentamiento se ha restringido a estudios arqueológicos pero su potencial se extiende mucho mas alla de esta disciplina. La colonia en el siglo XVIII registra un gran número de asentamientos en las planicies caribeñas para los cuales tenemos muy poca información precedente, se hace necesario entonces entender el sistema de asentamientos que exitosamente

  3. Family 34 glycosyltransferase (GT34) genes and proteins in Pinus radiata (radiata pine) and Pinus taeda (loblolly pine).

    Science.gov (United States)

    Ade, Carsten P; Bemm, Felix; Dickson, James M J; Walter, Christian; Harris, Philip J

    2014-04-01

    Using a functional genomics approach, four candidate genes (PtGT34A, PtGT34B, PtGT34C and PtGT34D) were identified in Pinus taeda. These genes encode CAZy family GT34 glycosyltransferases that are involved in the synthesis of cell-wall xyloglucans and heteromannans. The full-length coding sequences of three orthologs (PrGT34A, B and C) were isolated from a xylem-specific cDNA library from the closely related Pinus radiata. PrGT34B is the ortholog of XXT1 and XXT2, the two main xyloglucan (1→6)-α-xylosyltransferases in Arabidopsis thaliana. PrGT34C is the ortholog of XXT5 in A. thaliana, which is also involved in the xylosylation of xyloglucans. PrGT34A is an ortholog of a galactosyltransferase from fenugreek (Trigonella foenum-graecum) that is involved in galactomannan synthesis. Truncated coding sequences of the genes were cloned into plasmid vectors and expressed in a Sf9 insect cell-culture system. The heterologous proteins were purified, and in vitro assays showed that, when incubated with UDP-xylose and cellotetraose, cellopentaose or cellohexaose, PrGT34B showed xylosyltransferase activity, and, when incubated with UDP-galactose and the same cello-oligosaccharides, PrGT34B showed some galactosyltransferase activity. The ratio of xylosyltransferase to galactosyltransferase activity was 434:1. Hydrolysis of the galactosyltransferase reaction products using galactosidases showed the linkages formed were α-linkages. Analysis of the products of PrGT34B by MALDI-TOF MS showed that up to three xylosyl residues were transferred from UDP-xylose to cellohexaose. The heterologous proteins PrGT34A and PrGT34C showed no detectable enzymatic activity. © 2014 The Authors The Plant Journal © 2014 John Wiley & Sons Ltd.

  4. REPRESENTACIÓN SOCIAL DEL PROCESO DE AUTONOMÍA REGIONAL DE LA COSTA CARIBE DE NICARAGUA

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    Carlos Manuel Flores Gómez

    2016-01-01

    Full Text Available En este artículo se analizó la representación social de la Autonomía Regional de la Costa Caribe de Nicaragua, desde diarios nacionales, La Prensa y El Nuevo Diario. La metodología fue un diseño cualitativo, descriptivo, que destacó la cobertura y abordaje de la información, al comparar dos años: 1990 y 2010, en un período de seis meses, y conocer las diferencias sobre las noticias divulgadas. Los instrumentos utilizados fueron la revisión hemerográfica, el análisis de contenido y la aplicación de entrevistas dirigidas. Se ha evidenciado que el Régimen Autonómico, no ha sido prioridad de inclusión en la agenda mediática de los dos medios, cuyas publicaciones aún no cuentan con una apropiación de la Autonomía, por lo que se hace necesario compartir la visión de la Comunicación Intercultural, de tal manera que exista un compromiso asumido desde el periodismo nacional encaminado a la visibilización pertinente de la Costa Caribe nicaragüense.Summary In this article the social representation of the Regional Autonomy of the Caribbean Coast of Nicaragua was analyzed, from the perspective of the mass media, La Prensa and El Nuevo Diario. The methodology applied was a qualitative and descriptive design that highlighted the analysis and approach of the information, as it compared two years: 1990 and 2010, in a period of six months, in order to know the differences on the news that is disseminated. The instruments that we make use of were the hemerographic revision, the analysis of content and the application of targeted interviews. It has been shown that the autonomous regime, has not been a priority from the media agenda of the two national newspapers, whose publications don’t have as yet an appropriation of the autonomy, so it is necessary to share the vision of the Intercultural Communication, in order to create commitment from the national journalism aimed at the appropriate visibility of the Caribbean Coast of Nicaragua.

  5. Características del ciclo diurno de precipitación en el Caribe de Costa Rica

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    Fernán Sáenz

    2016-02-01

    Full Text Available El objetivo de este trabajo es estudiar las características del ciclo diurno de la precipitación en la vertiente Caribe de Costa Rica, su variabilidad espacial y estacional, así como su relación con los patrones de viento. El área de estudio es una vertiente tropical caracterizada por marcados gradientes topográficos y ubicada a barlovento de los alisios procedentes del mar Caribe. Se caracteriza el ciclo diurno medio de la precipitación en la región y su variabilidad mensual. La distribución mensual del viento horario es también analizada y se proponen algunos mecanismos de interacción de los sistemas de viento local con los alisios para explicar los patrones observados en el ciclo diurno de la precipitación. Para realizar este estudio se integró una base de datos con 20 series de tiempo con resolución horaria para la precipitación, obtenidas de 3 fuentes y 6 series de tiempo para el vector viento con la misma resolución. El estudio se complementó con compuestos mensuales de viento sinóptico derivados de ERA-interim. Se observó que el ciclo diurno medio anual de la precipitación tiene una gran variabilidad espacial que podría ser explicada, parcialmente al menos, por la topografía y la cercanía a la costa. A lo largo del año, en las diferentes subregiones que componen el área de estudio, se observaron los cuatro regímenes de variabilidad diurna que han sido reportados en estudios tropicales de carácter global: oceánico (máximos entre las 6 y 9 TSL, continental (máximos entre las 15 y 18 TSL, costero sobre el mar (máximos entre las 3 y 12 TSL y costero sobre tierra (máximos entre las 18 y 0 TSL. Se propone que la variabilidad de los alisios podría estar relacionada a la variabilidad estacional del ciclo diurno en algunas zonas. Los resultados obtenidos son consistentes en general con los presentados en estudios realizados con estimaciones satelitales de la precipitación pero con algunas diferencias en la fase

  6. Mean canopy stomatal conductance responses to water and nutrient availabilities in Picea abies and Pinus taeda.

    Science.gov (United States)

    Ewers, B E; Oren, R; Phillips, N; Strömgren, M; Linder, S

    2001-08-01

    We compared sap-flux-scaled, mean, canopy stomatal conductance (GS) between Picea abies (L.) Karst. in Sweden and Pinus taeda (L.) in North Carolina, both growing on nutritionally poor soils. Stomatal conductance of Picea abies was approximately half that of Pinus taeda and the sensitivity of GS in Picea abies to vapor pressure deficit (D) was lower than in Pinus taeda. Optimal fertilization increased leaf area index (L) two- and threefold in Pinus taeda and Picea abies, respectively, regardless of whether irrigation was increased. Although it increased L, fertilization did not increase GS in Picea abies unless irrigation was also provided. In Pinus taeda growing on coarse, sandy soils, the doubling of L in response to fertilization reduced GS sharply unless irrigation was also provided. The reduction in GS with fertilization in the absence of irrigation resulted from the production of fine roots with low saturated hydraulic conductivity. When Pinus taeda received both fertilization and irrigation, the increase in L was accompanied by a large increase in GS. In Pinus taeda, a reference GS (defined as GS at D = 1 kPa; GSR) decreased in all treatments with decreasing volumetric soil water content (theta). In Picea abies, theta varied little within a treatment, but overall, GSR declined with theta, reaching lowest values when drought was imposed by the interception of precipitation. Despite the large difference in GS both between Picea abies and Pinus taeda and among treatments, stem growth was related to absorbed radiation, and stem growth response to treatment reflected mostly the changes in L.

  7. Genetic relationships among some Pinus, Picea and Abies species revealed by RAPD markers

    Directory of Open Access Journals (Sweden)

    Kovačević Dragan

    2013-01-01

    Full Text Available Studies were undertaken to identify genetic relationships among ten different species of the family Pinaceae through randomly amplified polymorphic DNA (RAPD markers. Eighteen arbitrary RAPD primers produced 123 fragments of which 107 were polymorphic (87%. The similarity coefficient values varied from 0.34 to 0.67. The highest similarity coefficient was detected between Pinus wallichiana and P. strobus as well as between Picea abies and P. orientalis, and the lowest was detected between threePinus species (P. heldreichii, P. peuce and P. wallichiana and Picea omorika. The analysis of RAPD markers confirmed the genetic relationships among species. GenusPicea is clearly separated from genus Pinus and is closer to genus Abies (A. concolor than to genus Pinus, what confirms up-to-date numerous comparative-morphological, anatomical, chemotaxonomic and molecular results of these closely related genera. Furthermore, on the basis of our results, pine species from different subgenera -Pinus and Strobus are clearly separated. This statement is in agreement with contemporary intrageneric classification of the genus Pinus. [Projekat Ministarstva nauke Republike Srbije, br.173029

  8. Problem-solving and learning in Carib grackles: individuals show a consistent speed-accuracy trade-off.

    Science.gov (United States)

    Ducatez, S; Audet, J N; Lefebvre, L

    2015-03-01

    The generation and maintenance of within-population variation in cognitive abilities remain poorly understood. Recent theories propose that this variation might reflect the existence of consistent cognitive strategies distributed along a slow-fast continuum influenced by shyness. The slow-fast continuum might be reflected in the well-known speed-accuracy trade-off, where animals cannot simultaneously maximise the speed and the accuracy with which they perform a task. We test this idea on 49 wild-caught Carib grackles (Quiscalus lugubris), a tame opportunistic generalist Icterid bird in Barbados. Grackles that are fast at solving novel problems involving obstacle removal to reach visible food perform consistently over two different tasks, spend more time per trial attending to both tasks, and are those that show more shyness in a pretest. However, they are also the individuals that make more errors in a colour discrimination task requiring no new motor act. Our data reconcile some of the mixed positive and negative correlations reported in the comparative literature on cognitive tasks, suggesting that a speed-accuracy trade-off could lead to negative correlations between tasks favouring speed and tasks favouring accuracy, but still reveal consistent strategies based on stable individual differences.

  9. A presença e as potencialidades da Agricultura Familiar na América Latina e no Caribe

    Directory of Open Access Journals (Sweden)

    Sergio Schneider

    2016-10-01

    Full Text Available A agricultura familiar constitui o grupo social majoritário de unidades produtivas do meio rural latino-americano. Nos anos recentes, houve avanços importantes em relação ao reconhecimento de seu papel no desenvolvimento rural e na superação da pobreza. Várias organizações internacionais lançaram estudos para afirmar o papel estratégico dos pequenos produtores na segurança alimentar. Neste artigo, apresenta-se a agricultura familiar na América Latina e no Caribe e se discute a sua presença em diferentes países mediante o uso de dados estatísticos disponíveis, assim como se analisa as suas potencialidades para fortalecer o desenvolvimento rural. O trabalho inicia com uma discussão sobre os elementos que contribuíram para o interesse crescente dos estudiosos e formuladores de políticas na agricultura familiar e, na sequência, analisa-se suas características e a distribuição em diferentes países. O trabalho conclui que a agricultura familiar possui um papel central para o desenvolvimento rural da região latinoamericana e encerra com uma análise sobre as principais potencialidades em face do quadro político e institucional.

  10. La trayectoria histórica de la producción educativa en el Caribe colombiano

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    Reynaldo Mora Mora

    2015-10-01

    Full Text Available Esta investigación de tipo documental se basa en la producción educativa que está presente en la “Plataforma Scienti” de Colciencias (Departamento Administrativo de Ciencia, Tecnología e Innovación, Colciencias. Para este estudio se seleccionaron las principales producciones de los grupos de investigación en el área de la educación en el Caribe colombiano en el periodo 2000-2008. El trabajo parte de la premisa de que los planteamientos descritos por los investigadores asumen los requerimientos y problemáticas institucionales y de la sociedad. AbstractThis research, a documentary one, is based on the educative production, present in the “Plataforma Scienti” from Colciencias (Administrative Department of Sciencie, Technology and Innovation, Colciencias in Spanish. For this research, we chose the most important productions form the researcher groups in the education area in the Colombian Caribbean region, from 2000 to 2008. This work starts from the premise the written ideas described by the researchers, assume the requirements and institutional problems and from the society.

  11. MIGRAÇÃO E APROPRIAÇÃO DA OBRA DE FAULKNER NO CARIBE leituras de Edouard Glissant

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    Eurídice Figueiredo

    2012-12-01

    Full Text Available Este artigo propõe uma leitura cruzada das obras de Edouard Glissant e William Faulkner a partir de duas obras do escritor martinicano: o ensaio Faulkner, Mississipi e o romance Sartorius. No primeiro, ele dá ênfase a questões presentes em sua própriaobra romanesca: a genealogia, a relação com o espaço daplantação, a mestiçagem, a (ilegitimidade de direitos dos brancos sobre a terra, a opacidade. Já no romance, ele traça uma linhagem genealógica de um personagem pertencente a uma etnia africana imaginária; paralelamente, há a linhagem genealógica dos Sartoris. Pretendo mostrar como o projeto literário de Glissant dialoga com a obra de Faulkner, perscrutando e inventariandoas mesmas perplexidades em relação à migração de populações esua reinserção no espaço das plantações, seja no Sul dos Estados Unidos ou nas ilhas do Caribe.

  12. Cuantificación del potencial energético undimotriz en las costas del Caribe colombiano

    Directory of Open Access Journals (Sweden)

    Jaime P

    2017-11-01

    Full Text Available En este documento se describen los avances en la cuantificación de la energía de las olas de la costa caribeña colombiana. La metodología utilizada servirá como punto de partida para establecer el potencial energético en Colombia para este tipo de suministro energético. En la actualidad, el potencial energético teórico estimado en las ondas de la costa cercana en la costa atlántica es de aproximadamente 1107 MW y esto fue posible con datos que se han recogido y procesado desde enero de 2014. Las ecuaciones que tienen en cuenta variables tales como: la densidad del agua de mar, la temperatura y la velocidad del viento en la zona. También muestra el progreso del diseño del sistema Near Shore para la verificación del potencial de energía de las olas que consiste en un dispositivo que transforma la energía cinética de las ondas del mar en energía potencial gravitacional que se va a usar para mover un generador de corriente alterna.

  13. Favourable impact of regular swimming in young people with haemophilia: experience derived from 'Desafio del Caribe' project.

    Science.gov (United States)

    Boadas, A; Osorio, M; Gibraltar, A; Rosas, M M; Berges, A; Herrera, E; Gadea, S; Gutiérrez, M Á; Salazar, F; Ruiz-Sáez, A

    2015-01-01

    Swimming is beneficial for persons with haemophilia (PWH) providing good maintenance of the cardiovascular and musculoskeletal system and improving many psychological characteristics. In the Desafío del Caribe Project, young PWH from Venezuela and Mexico took part in an open water competition in the Gulf of Mexico under a multidisciplinary team supervision. Eight severe haemophilia A, two moderate haemophilia A, one severe haemophilia B and two moderate haemophilia B subjects were included. Haematological, musculoskeletal and psychological evaluations were carried out before and during training for the competition. Training program included physical exercise routines and swimming practices that alternated between pools and open water. Swimmers had coverage with factor concentrates before pool and open water trainings. In physiatric evaluations, the Hemophilia Joint Health Score (HJHS) was used. The objective of the psychology area was to analyse self-esteem, precompetition anxiety, coping mechanisms and relaxation levels. The need of factor prophylaxis before intense trainings was confirmed. In the musculoskeletal system a decrease of elbow pain as well as an increase of muscle strength in the ankles were observed. In the psychological area significant differences between the first and second test in self-esteem levels, cognitive anxiety and group cohesion were found. PWH must be provided with orientation and encouragement to practice swimming regularly. High competition exercise must be supervised by a multidisciplinary team which must evaluate the pros and cons of the activity to make relevant recommendations. © 2014 John Wiley & Sons Ltd.

  14. ESTRATEGIA ORGANIZACIONAL Y ADOPCIÓN DE PRÁCTICAS SALUDABLES EN LA REGIÓN CARIBE DE COLOMBIA

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    Luz Yarima Martínez Meléndez

    2017-07-01

    Full Text Available El artículo tiene como objetivo determinar la relación existente entre la estrategia organizacional y la adopción de prácticas saludables en las organizaciones de salud de la Región Caribe Colombiana. Para ello se buscó identificar la tipología de estrategia de mayor prevalencia en la organización objeto de estudio y analizar las prácticas saludables en instituciones del sector salud. La investigación se enmarcó en un enfoque cuantitativo, descriptivo, diseño correlacional. Para estudiar dicha relación, se llevó a cabo un trabajo de campo en empresas de salud tomando como muestra a 134 empleados de estas organizaciones. Resultados: se observó que la adopción de prácticas saludables relacionadas con planes de desarrollo, empleados y medio ambiente no tuvo una relación estadísticamente significativa con la estrategia; variables comunidad, compradores y vendedores, si tuvieron una relación estadísticamente significativa con la estrategia. Conclusión: relaciones entre planificación de carácter estratégico en una empresa, no se implementan en prácticas saludables en las organizaciones.

  15. CO2 isotope analyses using large air samples collected on intercontinental flights by the CARIBIC Boeing 767.

    Science.gov (United States)

    Assonov, S S; Brenninkmeijer, C A M; Koeppel, C; Röckmann, T

    2009-03-01

    Analytical details for 13C and 18O isotope analyses of atmospheric CO2 in large air samples are given. The large air samples of nominally 300 L were collected during the passenger aircraft-based atmospheric chemistry research project CARIBIC and analyzed for a large number of trace gases and isotopic composition. In the laboratory, an ultra-pure and high efficiency extraction system and high-quality isotope ratio mass spectrometry were used. Because direct comparison with other laboratories was practically impossible, the extraction and measurement procedures were tested in considerable detail. Extracted CO2 was measured twice vs. two different working reference CO2 gases of different isotopic composition. The two data sets agree well and their distributions can be used to evaluate analytical errors due to isotope measurement, ion corrections, internal calibration consistency, etc. The calibration itself is based on NBS-19 and also verified using isotope analyses on pure CO2 gases (NIST Reference Materials (RMs) and NARCIS CO2 gases). The major problem encountered could be attributed to CO2-water exchange in the air sampling cylinders. This exchange decreased over the years. To exclude artefacts due to such isotopic exchange, the data were filtered to reject negative delta18O(CO2) values. Examples of the results are given. Copyright (c) 2009 John Wiley & Sons, Ltd.

  16. La Salud Pública en América Latina y El Caribe Public Health in Latin America and the Caribbean

    Directory of Open Access Journals (Sweden)

    Oscar García-Roco Pérez

    2002-08-01

    Full Text Available Se consideran a través de la situación de salud, las características de la Salud Pública en América Latina y el Caribe, su evolución y los hechos que justifican los procesos de reforma del sector, sus fuentes teóricas, la forma en que se desarrollan, y los problemas que enfrentan. Se describen las características esenciales de Colombia, Chile, México, Venezuela y se particulariza en el modelo cubano. Se realiza una reflexión final respecto a la contradictoria situación prevaleciente y se analiza su contexto políticoThe characteristics of Public Health in Latin America and the Caribbean through the present health state of the region is considered. The evolution of these characteristics and the facts that justify the processes of reformation of the sector, as well as their theoretical sources ; the form in which they are developed, and the problems they face are also regarded. The essential characteristics of Colombia, Chile, Mexico, Venezuela and particularly those of the Cuban model are described. A final reflection regarding the contradictory prevalent situation and its political context is made

  17. FESTIVAL VER CIENCIA CARIBE: UN MODELO DE APROPIACIÓN SOCIAL DEL CONOCIMIENTO CIENTÍFICO REGIONAL

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    Carlos Ospina Bozzi

    2007-08-01

    Full Text Available El Festival Ver Ciencia Caribe se aborda desde la recuperación y valorización de lainvestigación científica regional, la inteligencia colectiva y la identidad cultural.Promueve el objetivo social de construir una cultura científica humanística que lapoblación juvenil pueda llegar a sentir como propia.El modelo de apropiación que estamos presentando a la comunidad internacionalentiende que es posible producir materiales de divulgación científica, popularizacióny apropiación social del conocimiento, útiles tanto para el ámbito de la enseñanza formal como para el de la educación informal, mediante múltiples usos, tanto en la emisión en medios de comunicación masiva, como en el aula de clase y en otros ámbitos sociales.

  18. Mercury Plumes in the Global Upper Troposphere Observed during Flights with the CARIBIC Observatory from May 2005 until June 2013

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    Franz Slemr

    2014-05-01

    Full Text Available Tropospheric sections of flights with the CARIBIC (Civil Aircraft for Regular Investigation of the Atmosphere Based on an Instrumented Container observatory from May 2005 until June 2013, are investigated for the occurrence of plumes with elevated Hg concentrations. Additional information on CO, CO2, CH4, NOy, O3, hydrocarbons, halocarbons, acetone and acetonitrile enable us to attribute the plumes to biomass burning, urban/industrial sources or a mixture of both. Altogether, 98 pollution plumes with elevated Hg concentrations and CO mixing ratios were encountered, and the Hg/CO emission ratios for 49 of them could be calculated. Most of the plumes were found over East Asia, in the African equatorial region, over South America and over Pakistan and India. The plumes encountered over equatorial Africa and over South America originate predominantly from biomass burning, as evidenced by the low Hg/CO emission ratios and elevated mixing ratios of acetonitrile, CH3Cl and particle concentrations. The backward trajectories point to the regions around the Rift Valley and the Amazon Basin, with its outskirts, as the source areas. The plumes encountered over East Asia and over Pakistan and India are predominantly of urban/industrial origin, sometimes mixed with products of biomass/biofuel burning. Backward trajectories point mostly to source areas in China and northern India. The Hg/CO2 and Hg/CH4 emission ratios for several plumes are also presented and discussed.

  19. APORTES A LA BIOLOGÍA DE TIBURONES Y RAYAS DEMERSALES EN LA REGIÓN NORTE DEL CARIBE COLOMBIANO

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    Fabian Moreno

    2008-09-01

    Full Text Available El presente estudio es una contribución al conocimiento biológico de los peces cartilaginosos en la región norte del Caribe colombiano. Los ejemplares examinados se capturaron con una red demersal, se determinó su peso, longitud total y estado de madurez sexual. Adicionalmente se realizó la ubicación espacial de las capturas y la relación con las variables ambientales. Se capturaron un total de 21 individuos, colectando tres especies de rayas, Dasyatis americana, D. guttata y Rhinobatos percellens, dos de tiburones Mustelus minicanis y Rhizoprionodon porosus, la más común fue D. guttata con 56%, las tallas (longitud total fluctuaron entre los 1.760 - 394 mm en rayas y 595 - 585 mm en tiburones. Se obtuvieron más hembras que machos para todas las especies, con predominio de estados inmaduros y en maduración, solo se registró una hembra grávida deM. Minicanis con dos embriones.

  20. El camino de la primera viruela en el nuevo mundo, del caribe a Tenochtitlán, 1493-1521.

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    Elsa Malvido

    2008-12-01

    Full Text Available The topic that us occupies in this one work is the beginning of the new pathology in the center of convergence of the American history of these times, the Carib and from there, his(her,your expansion to firm land, or, that we try to chase(prosecute the way of her(it firstly pandemic of smallpox, to know whom and when they imported it, as well as how much time took to continue the contagion and the devastations that it(he,she caused between(among the native inhabitants, that is to say, to play with the history to do the epidemiological geography of the route of the smallpox, using the scientific advances of ours Times, as well as to include new documents and studies of the topic, for which we must do the trip from Cadiz to the Caribbean seas crossing the populations of the islands and to continue the trip for the routes of the suffering, from the coast of the Side Cross up to coming to the heart of the Indo-American cultures, the great Tenochtitlán.

  1. La violencia familiar (conyugal/pareja en las ciudades de Cartagena y Barranquilla en el Caribe colombiano

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    Marta Silva Pertuz

    2017-01-01

    Full Text Available El objetivo del presente estudio fue identi car cuáles son los factores que subyacen a la violencia familiar (conyugal/ pa- reja en las ciudades de Cartagena y Barranquilla en el Caribe Colombiano. Los participantes fueron dieciséis parejas en cada una de las dos ciudades, contexto de este trabajo; igualmente profesionales de diferentes disciplinas que vienen trabajando con esta patología familiar, doce en Barranquilla y once en Cartagena. Los instrumentos utilizados fueron el Cuestionario para la Detección de la Violencia en las relaciones de pareja (Autor: Soriano, Díaz Andrés (2006. N° GR2760/2006, Universidad De Granada (España, entrevista estructurada con dieciséis preguntas abiertas aplicada a profesionales; formato de registro de un grupo focal con estudiantes de diversas profesiones próximos a egresar y formato sobre registros de la observación participante. En los hallazgos se observa la tendencia hacia el maltrato psicológico-emocional, principalmente por el contexto cultural que normaliza / normatiza el poder o in uencia del hombre sobre la mujer; como lo indican las cifras en relación con la mayor- mente explicitada violencia sexual (entre otras violencias en la pareja, a pesar del aumento de los registros en Medicina Legal y Fiscalía por agresión sexual, estos resultados muestran que aún no se es capaz de denunciar tales abusos o lo toman como parte de las “obligaciones maritales”.Palabras clave: Violencia familiar, violencia de pareja, Cartagena, Barranquilla, Caribe ColombianoAbstract the aim of the present study was identi ed which are the factors that sublie to the familiar violence (conyugal/pair in the cities of Cartagena and Barranquilla in the Colombian Caribbean. e participants were sixteen pairs in each of two cities, context of this work; equally professionals of di erent disciplines who come working with this familiar pathology, twelve in Barranquilla and eleven in Cartagena. e used

  2. LA LIBERTAD DE ELEGIR: POLÍTICA, GOBERNABILIDAD Y POBREZA EN EL CARIBE COLOMBIANO, 1859-1885

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    Luis Alarcón Meneses

    2012-09-01

    Full Text Available Durante la segunda mitad del siglo XIX Colombia se organizó a través de un régimen federal (1857-1886, el cual estuvo integrado por nueve entidades territoriales denominadas Estados Soberanos. Dos de esas entidades territoriales reconocidas por la Constitución Federal de 1863 fueron Bolívar y Magdalena. Este artículo analiza el nivel de politización alcanzado por los ciudadanos de los dos. Lo anterior permitirá una aproximación a la sociedad y a la política en lo que hoy llamamos Caribe colombiano. También identificar las prácticas políticas del periodo federal, la presencia lograda por los partidos con sus respectivas facciones en la vida ciudadana y acercarnos a las características más sobresalientes de los Estados Soberanos como entidades político-administrativas.

  3. Vocación y andanzas caribeñas de Antonio López de Santa Anna

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    Flores Hernández, Benjamín

    2010-12-01

    Full Text Available This essay analyses Antonio López de Santa Anna, the famous Mexican military man and politician in his Caribbean facet, studying particularly the moments when he lived and operated in the Gulf of Mexico and in the Caribbean Sea, in peace and in war, in Mexico or in the exile. With this perspective more data is given for an accurate interpretation of this personage and the contribution to the history of the zone.

    El presente texto analiza la figura del célebre militar y hombre público mexicano Antonio López de Santa Anna en su faceta caribeña, teniendo como guía los periodos en los que el caudillo mantuvo un contacto directo con la región: desde su nacimiento, a través de sus andanzas militares y de sus diversos intentos por incidir en la política de la zona, y hasta sus emblemáticos exilios. Con esta perspectiva se aportan datos para una más cabal interpretación del significado del personaje, al relacionarlo con la historia de la zona.

  4. Genetic diversity and the mating system of a rare Mexican Piñon, Pinus pinceana, and a comparison with Pinus maximartinezii (Pinaceae)

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    F. Thomas Ledig; Miguel A. Capó-Arteaga; Paul D. Hodgskiss; Hassan Sbay; Celestino Flores-López; M. Thompson Conkle; Basilio Bermejo-Velázquez

    2001-01-01

    Weeping piñon (Pinus pinceana) has a restricted and fragmented range, trees are widely scattered within populations, and reproduction is limited. Nevertheless, genetic diversity was high; based on 27 isozyme loci in 18 enzyme systems, unbiased expected heterozygosity averaged 0.174. Differentiation also was high (FST = 0.152),...

  5. Biocontrol of Fusarium circinatum Infection of Young Pinus radiata Trees

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    Eugenia Iturritxa

    2017-01-01

    Full Text Available Pitch canker, caused by the fungus Fusarium circinatum, is a major disease of Pinus radiata currently controlled to some extent in nurseries by good hygiene and application of synthetic fungicides. The aim of this study was to evaluate alternative strategies to control fungal infections in nurseries and young pine plantations. The antagonistic effects of biocontrol bacteria and essential oils against F. circinatum in vitro and in young P. radiata trees were assessed. Pseudomonas fluorescens, Erwinia billingiae, and Bacillus simplex reduced the growth of the fungus in vitro by 17%–29%, and decreased the density of the mycelial mat. In young P. radiata trees, the length of F. circinatum lesions was reduced by 22%–25% by the same bacterial strains. Direct application of cinnamon and/or clove essential oils to wounds in stems of two-year-old P. radiata trees also limited the damage caused by F. circinatum. Lesion length was reduced by 51% following treatment with cinnamon oil (10% v/v, and by 45% following treatment with clove oil (15% v/v or a combination of both oils. However, the oils were toxic to younger trees. The biocontrol bacteria and essential oils show promise as prophylactic treatments to reduce the devastating effects of F. circinatum on P. radiata.

  6. THE INFECTION PROCESS OF Fusarium subglutinans IN Pinus merkusii SEEDLINGS

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    S. M. Widyastuti

    2014-06-01

    Full Text Available Pinus merkusii or tusam is an original Indonesian plant and it is naturally distributed in Aceh and North Sumatra. Damping-off disease is the main problem in its nurseries. Fusarium subglutinans is one of the leading causes of damping-off disease. The knowledge of fungal infections process of tusam seedlings is essential to control damping- off disease effectively.The aim of this research is to understand (1 infection process of F. subglutinans in tusam seedlings and the defence response of seedlings against the infection of F. subglutinans. The methods used in this research were (1 identification of fungal pathogens that causing the disease, (2 pathogenicity test of F. subglutinans, (3 detection the accumulation of lignin, accumulation of callose and hypersensitive reactions by staining of seedling tissue using phloroglucinol, aniline blue and lactophenol trypan blue.The results of this study revealed that spores germination occurred in two days after inoculation. Direct penetration through cell wall and stomata was observed on the third day after inoculation. There was hypersensitive reaction in stomata. Accumulation of callose and lignin appeared on the third day after inoculation. However, defence response of seedlings was not effective, as F. subglutinans is a necrotroph fungus.

  7. Various response of Pinus tabulaeformis Carr. regeneration in artifical gaps.

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    Wang, Zhibin; Zhao, Kuangji; Yang, Haijiao; Ma, Lvyi; Jia, Zhongkui

    2017-11-06

    Understanding the influence of gaps in promoting canopy recruitment will help to maintain structural stability and achieve continuous forest cover. We established three control plots and experimental plots with three replications each (gap sizes L-I, L-II, L-III, and L-IV) in a Chinese pine (Pinus tabulaeformis Carr.) plantation to test the short-term effects of gap size on the age distribution, density and growth, and annual height and ground diameter growth for regeneration established before (REBG) and after (REAG) gap creation. Age distribution exhibited an approximately normal distribution, with the numbers of REBG and REAG decreasing and increasing, respectively, as the age increased. Although there was no difference in density among gap size classes, regeneration growth positively responded to gap size, with maximum values observed in class L-III. Annual average height growth after (AAH-A) gap creation was significantly greater than that before (AAH-B) gap creation for REBG among gap sizes, suggesting that gaps promote the rapid growth of regeneration. However, the responses of height and ground diameter growth in REBG to gap size were not immediate and exhibited a response delay of 2-4 years. Similarly, for the height and ground diameter growth of REAG, significant differences were first observed within years 2-4 after germination in the same growing season for all gap size classes.

  8. VARIABILITY OF THE MORPHOLOGIC PARAMETERS IN Pinus elliottii Engelm SEEDLINGS

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    Eduardo Righi dos Reis

    2008-06-01

    Full Text Available Even whith the advance in the techniques of seedlings production, many problems still remain to be solved, mainly thoseproblems related to seedlings delivery. This work verified the variability of the growth parameters in seedlings of Pinus elliottii indifferent positions inside the production tray, along the time, seeking to identify the best time and form of delivery of homogeneous andhigh quality seedlings. In order to achieve these purposes, an experiment was installed in the forest nursery of Santa Maria FederalUniversity RS. Ten evaluations of height, diameter of the collar and height/diameter relationship were performed, in intervals of 15days. It was simulated each tray of the repetition parcel in order to determine the best form of seedlings delivery from the green house.It was verified that, 135 days after germination, uniformity among morphologic parameters of seedlings delivery were achieved forthe simulations when dividing the tray in Border x Center (BxC, Right x Center x Left (DxCxE, and Quadrants, and that after 180days, Front x Center x Bottom (FrxCxF standardization was achieved. Differences in the quality pattern of seedlings collected indifferent places and submitted to the same development condition were observed and that seedlings delivered on a regular scheduleallows obtaining homogeneous quality pattern.

  9. [Variation of dormancy characteristic of different Pinus bungeana seed sources].

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    Wang, X; Liu, J; Wang, J

    2000-02-01

    Studies on the dormancy characteristics of Pinus bungeana seeds from 7 representative seed sources show that the difference of water permeability of seed capsule was very significant among seed sources. The seeds from northern part of distribution area had a much higher water permeability than from the south. According to water permeability, the seven seed sources were divided into 2 geographical groups, with Qinling Mountain as the division line. The difference of seed ventilation was caused firstly by outer seed capsule, and secondly by inner one. The variation of permeability had a similar trend with the ventilation. The inhibition ability of seed extracts was significantly different among different seed sources, which was increased with the concentration of seed extracts. Based on the inhibition ability of extracts from seed capsule and endosperm, the seven seed sources were divided into 2 and 3 geographical groups, respectively. The germination capacity decreased with increasing latitude, and seeds with poor germination capacity took relatively more time for germination. All population groups based on different division criteria showed such a character, i.e., the difference of seed characteristics was more significant among groups than in same group, and the distance of seed source was longer among groups than in a group. The difference of dormancy characteristics of different P. bungeana seed sources was the result of interaction between climatic and geographical factors.

  10. Local variations in microfungal populations on Pinus sylvestris needles.

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    Gourbière, François; Debouzie, Domitien

    2003-10-01

    We studied the fungal colonization of Pinus sylvestris needles in two neighbouring sites, comparing stands of isolated and grouped trees. We observed large variations among the proportions of needles bearing fruit bodies of Cyclaneusma minus, Lophodermium pinastri, Verticicladium trifidum and black lines characteristic of L. pinastri colonization. Variations between sites and within trees were greater than that between stands or between trees. The frequency of L. pinastri colonization was negatively correlated with C. minus fruit body frequency, while the frequency of V. trifidum conidiophores was positively correlated with L. pinastri colonization frequency without fruiting, and negatively correlated with C. minus apothecia frequency. Although L. pinastri black lines and C. minus apothecia were nearly randomly associated on individual needles in each sample, the two fungi occupied different segments when they occupied the same needle. These patterns at needle and sample scales do not explain the negative correlation between the frequencies of these two species observed at larger scales. In each sample, frequency of V. trifidum conidiophores was highest on needles colonized by L. pinastri without fruiting. On individual needles, V. trifidum conidiophores developed on segments colonized by L. pinastri without fruiting, but not on segments bearing fruit bodies of L. pinastri or C. minus. These patterns at needle and sample scales were consistent with the correlations between frequencies observed at larger scales. These results were compared to variations observed with stand age and climate in others studies. The observed variations might result from both microclimate variations and fungal interactions.

  11. Effects of "short" photoperiods on seedling growth of Pinus brutia.

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    Iakovoglou, V; Radoglou, K; Kostopoulou, P; Dini-Papanastasi, O

    2012-03-01

    This study investigated how nurseries could benefit by inducing "short" photoperiods as low as 4 hr to produce "better" seedlings characterized by more vigorous roots; a substantial feature to overcome transplanting stress. The carryover effect of the photoperiod was also investigated on seedlings that grew for 30 days more underthe consistent 14 hr photoperiod. Seedlings of Pinus brutia were subjected to 4, 6, 8 and 14 hr photoperiod for 3 week. Fifteen seedlings were used to evaluate the leaf area, the root and shoot dry weight and their ratio. Six and sixteen seedlings were used to evaluate the shoot electrolyte leakage and the root growth potential, respectively. Based on the results, the 6 and 8 hr photoperiod indicated greater root allocation (4.8 and 4.9 mg, respectively) and chlorophyll content (3.7 and 4.4, respectively). They also indicated greater leaf area values (3.3 and 3.5 cm2, respectively) along with the 14 hr (3.4 cm2). The photoperiod effect continued even after seedlings were subjected at consistent photoperiod. Overall, "short" photoperiods could provide "better" P. brutia seedlings to accommodate immediate massive reforestation and afforestation needs.

  12. Variation among individuals in cone production in Pinus palustris (Pinaceae).

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    Haymes, Kelly L; Fox, Gordon A

    2012-04-01

    Reproductive output varies considerably among individuals within plant populations, and this is especially so in cone production of conifers. While this variation can have substantial effects on populations, little is known about its magnitude or causes. We studied variation in cone production for 2 years within a population of Pinus palustris Mill. (longleaf pine; Pinaceae). Using hurdle models, we evaluated the importance of burn treatments, tree size (dbh), canopy status (open, dominant, subordinate), and number of conspecific neighbors within 4 m (N(4)). Cone production of individuals-even after accounting for other variables-was strongly correlated between years. Trees in plots burned every 1, 2, or 5 years produced more cones than those burned every 7 years, or unburned. Larger trees tend to produce more cones, but the large effects of the other factors studied caused substantial scatter in the dbh-cone number relationship. Among trees in the open, dbh had little explanatory power. Subordinate trees with three neighbors produced no cones. Tree size alone was a weak predictor of cone production. Interactions with neighbors play an important role in generating reproductive heterogeneity, and must be accounted for when relating cone production to size. The strong between-year correlation, together with the large variance in cone production among trees without neighbors, suggests that still more of the variance may be explainable, but requires factors outside of our study.

  13. Association genetics in Pinus taeda L. II. Carbon isotope discrimination.

    Science.gov (United States)

    González-Martínez, S C; Huber, D; Ersoz, E; Davis, J M; Neale, D B

    2008-07-01

    Dissection of complex traits that influence fitness is not only a central topic in evolutionary research but can also assist breeding practices for economically important plant species, such as loblolly pine (Pinus taeda L). In this study, 46 single nucleotide polymorphisms (SNPs) from 41 disease and abiotic stress-inducible genes were tested for their genetic association with carbon isotope discrimination (CID), a time-integrated trait measure of stomatal conductance. A family-based approach to detect genotype/phenotype genetic association was developed for the first time in plants by applying the quantitative transmission disequilibrium test on an association population of 961 clones from 61 families (adopted from previous breeding programs) evaluated for phenotypic expression of CID at two sites. Two particularly promising candidates for their genetic effects on CID are: dhn-1, involved in stabilization of cell structures, and lp5-like, a glycine rich protein putatively related to cell wall reinforcement proteins, both of which were shown in previous studies to be water-deficit inducible. Moreover, association in lp5-like involves a nonsynonymous mutation in linkage disequilibrium with two other nonsynonymous polymorphisms that could, by acting together, enhance overall phenotypic effects. This study highlights the complexity of dissecting CID traits and provides insights for designing second-generation association studies based on candidate gene approaches in forest trees.

  14. Nitrogen metabolism in Lignifying Pinus taeda cell cultures

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    van Heerden, P. S.; Towers, G. H.; Lewis, N. G.

    1996-01-01

    The primary metabolic fate of phyenylalanine, following its deamination in plants, is conscription of its carbon skeleton for lignin, suberin, flavonoid, and related metabolite formation. Since this accounts for approximately 30-40% of all organic carbon, an effective means of recycling the liberated ammonium ion must be operative. In order to establish how this occurs, the uptake and metabolism of various 15N-labeled precursors (15N-Phe, 15NH4Cl, 15N-Gln, and 15N-Glu) in lignifying Pinus taeda cell cultures was investigated, using a combination of high performance liquid chromatography, 15N NMR, and gas chromatograph-mass spectrometry analyses. It was found that the ammonium ion released during active phenylpropanoid metabolism was not made available for general amino acid/protein synthesis. Rather it was rapidly recycled back to regenerate phenylalanine, thereby providing an effective means of maintaining active phenylpropanoid metabolism with no additional nitrogen requirement. These results strongly suggest that, in lignifying cells, ammonium ion reassimilation is tightly compartmentalized.

  15. Selfed embryo death in Pinus taeda: a phenotypic profile.

    Science.gov (United States)

    Williams, Claire G

    2008-01-01

    Selective elimination of selfed embryos, or inbreeding depression, is shared among many members of the Pinaceae but it has not been fully characterized at the phenotypic level. Here, two death pattern model hypotheses are tested using 10 621 Pinus taeda embryos sampled in two cohorts. Cones from a single pedigree based on selfed, outbred, parent-offspring and offspring-parent matings were destructively sampled weekly before, during and after fertilization. Selfed embryo deaths adhered to two patterns over the course of development: death was linear with respect to days from fertilization; and a stage-specific death peak occurred during the early embryogeny stage. This death peak occurred from 23 to 36 d after fertilization in the 2004 cohort and from 27 to 34 d after fertilization in the 2006 cohort. Of those selfed embryos that died, 64-83% died at stages where a single dominant embryo was elongating inside the female gametophyte. Additional genetic models are needed to account for the stage-specific death component of selfed P. taeda embryos.

  16. Association genetics of the loblolly pine (Pinus taeda, Pinaceae) metabolome.

    Science.gov (United States)

    Eckert, Andrew J; Wegrzyn, Jill L; Cumbie, W Patrick; Goldfarb, Barry; Huber, Dudley A; Tolstikov, Vladimir; Fiehn, Oliver; Neale, David B

    2012-03-01

    The metabolome of a plant comprises all small molecule metabolites, which are produced during cellular processes. The genetic basis for metabolites in nonmodel plants is unknown, despite frequently observed correlations between metabolite concentrations and stress responses. A quantitative genetic analysis of metabolites in a nonmodel plant species is thus warranted. Here, we use standard association genetic methods to correlate 3563 single nucleotide polymorphisms (SNPs) to concentrations of 292 metabolites measured in a single loblolly pine (Pinus taeda) association population. A total of 28 single locus associations were detected, representing 24 and 20 unique SNPs and metabolites, respectively. Multilocus Bayesian mixed linear models identified 2998 additional associations for a total of 1617 unique SNPs associated to 255 metabolites. These SNPs explained sizeable fractions of metabolite heritabilities when considered jointly (56.6% on average) and had lower minor allele frequencies and magnitudes of population structure as compared with random SNPs. Modest sets of SNPs (n = 1-23) explained sizeable portions of genetic effects for many metabolites, thus highlighting the importance of multi-SNP models to association mapping, and exhibited patterns of polymorphism consistent with being linked to targets of natural selection. The implications for association mapping in forest trees are discussed. © 2011 The Authors. New Phytologist © 2011 New Phytologist Trust.

  17. Hydraulic adjustments underlying drought resistance of Pinus halepensis.

    Science.gov (United States)

    Klein, Tamir; Cohen, Shabtai; Yakir, Dan

    2011-06-01

    Drought-induced tree mortality has increased over the last decades in forests around the globe. Our objective was to investigate under controlled conditions the hydraulic adjustments underlying the observed ability of Pinus halepensis to survive seasonal drought under semi-arid conditions. One hundred 18-month saplings were exposed in the greenhouse to 10 different drought treatments, simulating combinations of intensities (fraction of water supply relative to control) and durations (period with no water supply) for 30 weeks. Stomata closed at a leaf water potential (Ψ(l)) of -2.8 MPa, suggesting isohydric stomatal regulation. In trees under extreme drought treatments, stomatal closure reduced CO(2) uptake to -1 µmol m(-2) s(-1), indicating the development of carbon starvation. A narrow hydraulic safety margin of 0.3 MPa (from stomatal closure to 50% loss of hydraulic conductivity) was observed, indicating a strategy of maximization of CO2 uptake in trees otherwise adapted to water stress. A differential effect of drought intensity and duration was observed, and was explained by a strong dependence of the water stress effect on the ratio of transpiration to evapotranspiration T/ET and the larger partitioning to transpiration associated with larger irrigation doses. Under intense or prolonged drought, the root system became the main target for biomass accumulation, taking up to 100% of the added biomass, while the stem tissue biomass decreased, associated with up to 60% reduction in xylem volume.

  18. Asexual propagation of Pinus leiophylla Schiede ex Schltdl. et Cham.

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    Juan Carlos Cuevas-Cruz

    2015-01-01

    Full Text Available Resumen El efecto del sustrato, tipo de estaca y concentración de ácido indolbutírico (AIB se evaluó en el enraizado de estacas de Pinus leiophylla con el propósito de multiplicar progenies de familias de medios hermanos con crecimiento sobresaliente. Para ello se utilizaron dos tipos de sustratos (agrolita y una mezcla de turba-agrolita-vermiculita 1:1:1, dos tipos de estacas (apicales y basales y dos concentraciones de AIB (0 y 10,000 ppm. La probabilidad y porcentaje de enraizado, crecimiento de la estaca y características de las raíces formadas de P. leiophylla se evaluaron. Los resultados indican que usando estacas basales es 3.5 veces más probable que el enraizamiento de P. leiophylla sea exitoso que utilizando estacas apicales. El tratamiento formado por la mezcla de turba-agrolita-vermiculita, estaca basal y 10,000 ppm de AIB produjo 45.3 % de enraizamiento (mayor porcentaje, mientras que con el testigo solo se obtuvo 8.6 % de enraizamiento (agrolita, estaca basal y sin AIB. Las interacciones que incluyeron el tipo de sustrato mostraron diferencias significativas (P ≤ 0.05 en el crecimiento de la estaca. El uso de agrolita y la aplicación de AIB favorecieron un mayor número de raíces, particularmente en las estacas tipo basal de P. leiophylla.

  19. [Soil microbial functional diversity of different altitude Pinus koraiensis forests].

    Science.gov (United States)

    Han, Dong-xue; Wang, Ning; Wang, Nan-nan; Sun, Xue; Feng, Fu-juan

    2015-12-01

    In order to comprehensively understand the soil microbial carbon utilization characteristics of Pinus koraiensis forests, we took the topsoil (0-5 cm and 5-10 cm) along the 700-1100 m altitude in Changbai Mountains and analyzed the vertical distributed characteristics and variation of microbial functional diversity along the elevation gradient by Biolog microplate method. The results showed that there were significant differences in functional diversity of microbial communities at different elevations. AWCD increased with the extension of incubation time and AWCD at the same soil depth gradually decreased along with increasing altitude; Shannon, Simpson and McIntosh diversity index also showed the same trend with AWCD and three different diversity indices were significantly different along the elevation gradient; Species diversity and functional diversity showed the same variation. The utilization intensities of six categories carbon sources had differences while amino acids were constantly the most dominant carbon source. Principal component analysis (PCA) identified that soil microbial carbon utilization at different altitudes had obvious spatial differentiation, as reflected in the use of carbohydrates, amino acids and carboxylic acids. In addition, the cluster of the microbial diversity indexes and AWCD values of different altitudes showed that the composition of vegetation had a significant impact on soil microbial composition and functional activity.

  20. Aboveground Tree Biomass for Pinus ponderosa in Northeastern California

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    Todd A. Hamilton

    2013-03-01

    Full Text Available Forest managers need accurate biomass equations to plan thinning for fuel reduction or energy production. Estimates of carbon sequestration also rely upon such equations. The current allometric equations for ponderosa pine (Pinus ponderosa commonly employed for California forests were developed elsewhere, and are often applied without consideration potential for spatial or temporal variability. Individual-tree aboveground biomass allometric equations are presented from an analysis of 79 felled trees from four separate management units at Blacks Mountain Experimental Forest: one unthinned and three separate thinned units. A simultaneous set of allometric equations for foliage, branch and bole biomass were developed as well as branch-level equations for wood and foliage. Foliage biomass relationships varied substantially between units while branch and bole biomass estimates were more stable across a range of stand conditions. Trees of a given breast height diameter and crown ratio in thinned stands had more foliage biomass, but slightly less branch biomass than those in an unthinned stand. The observed variability in biomass relationships within Blacks Mountain Experimental Forest suggests that users should consider how well the data used to develop a selected model relate to the conditions in any given application.

  1. Occurrence of Ganoderma adspersum on Pinus pinea

    Directory of Open Access Journals (Sweden)

    Daniele De SIMONE

    2012-09-01

    Full Text Available During a survey in a pine stand in Rome, six basidiomes of Ganoderma adspersum were collected from declining 50-60 year-old Pinus pinea. Species identification was accomplished through observation of macroscopic and microscopic morphological traits. Furthermore, ITS sequences of the collected specimens, 28 samples collected elsewhere, one isolate from the German collection of Microorganisms and Cell Cultures (DSMZ, and 21 sequences from GenBank were analyzed using MP and UPGMA. Both analyses showed that isolates fell into four well-delineated clades, namely G. adspersum, G. applanatum, G. resinaceum and G. lucidum. All the isolates collected from P. pinea were confirmed as G. adspersum. Previously, G. adspersum had been reported on hardwood trees and infrequently on a few conifers. Only sporocarps identified on the basis of morphological characters as G. applanatum have sporadically been recorded on P. pinea; there is no previous record of G. adspersum on this host. Somatic incompatibility tests showed that infections, probably via basidiospores, and symptoms apparently associated with wood colonization by G. adspersum, worsened during the 3-year course of the study.

  2. Ethnobotany and phytopharmacology of Pinus roxburghii Sargent: a plant review.

    Science.gov (United States)

    Kaushik, Pawan; Kaushik, Dhirender; Khokra, Sukhbir Lal

    2013-11-01

    Traditional medicine is a blend of information gathered over generations from various communities and cultures. Pinus roxburghii Sargent (Pinaceae) commonly known as "chir pine" is widely used in traditional and folkloric systems of medicine. The all parts of the plant are believed to possess medicinal qualities in Ayurvedic and Unani systems of medicine. In these traditional systems of medicine, the plant is used to heal many diseases, including afflictions of the eyes, ears, throat, blood, and skin. The plant parts are rich in various bioactive compounds such as α-pinene, abietic acid, quercetin and xanthone. Resin acids and flavanoid form a major portion of these bioactive compounds. This review presents examples of traditional medicinal uses for P. roxburghii, and subsequently explores the current understanding of the chemical, pharmacological, and biochemical properties of the extracts and the main active constituents found in each tissue of the plant. Clinical trial information is also included where available. Careful evaluation of these data may be helpful for scientists and researchers to discover and evaluate the specific chemical entities responsible for the traditional medicinal uses of P. roxburghii.

  3. Modeling productivity and transpiration of Pinus radiata: climatic effects.

    Science.gov (United States)

    Sheriff, D. W.; Mattay, J. P.; McMurtrie, R. E.

    1996-01-01

    Climatic effects on annual net carbon gain, stem biomass and annual transpiration were simulated for Pinus radiata D. Don at Canberra and Mt. Gambier. Simulations were conducted with an existing process-based forest growth model (BIOMASS, Model 1) and with a modified version of the BIOMASS model (Model 2) in which response functions for carbon assimilation and leaf conductance were replaced with those derived from field gas exchange data collected at Mt. Gambier. Simulated carbon gain was compared with a published report stating that mean annual stem volume increment (MAI) at Mt. Gambier was 1.8 times greater than at Canberra and that the difference could be the result solely of differences in climate. Regional differences in climate resulted in a 20% greater simulated annual transpiration at Canberra than at Mt. Gambier but only small differences in simulated productivity, indicating that climatic differences did not account for the reported differences in productivity. With Model 1, simulated annual net carbon gain and annual increase in stem biomass were greater at Canberra than at Mt. Gambier, whereas Model 2 indicated a similar annual net carbon gain and annual stem biomass increase in both regions.

  4. Urbanization in China drives soil acidification of Pinus massoniana forests.

    Science.gov (United States)

    Huang, Juan; Zhang, Wei; Mo, Jiangming; Wang, Shizhong; Liu, Juxiu; Chen, Hao

    2015-09-24

    Soil acidification instead of alkalization has become a new environmental issue caused by urbanization. However, it remains unclear the characters and main contributors of this acidification. We investigated the effects of an urbanization gradient on soil acidity of Pinus massoniana forests in Pearl River Delta, South China. The soil pH of pine forests at 20-cm depth had significantly positive linear correlations with the distance from the urban core of Guangzhou. Soil pH reduced by 0.44 unit at the 0-10 cm layer in urbanized areas compared to that in non-urbanized areas. Nitrogen deposition, mean annual temperature and mean annual precipitation were key factors influencing soil acidification based on a principal component analysis. Nitrogen deposition showed significant linear relationships with soil pH at the 0-10 cm (for ammonium N(NH4+(-N)), P < 0.05; for nitrate N(NO3-(-N)), P < 0.01) and 10-20 cm (for NO3-(-N), P < 0.05) layers. However, there was no significant loss of exchangeable non-acidic cations along the urbanization gradient, instead their levels were higher in urban than in urban/suburban area at the 0-10 cm layer. Our results suggested N deposition particularly under the climate of high temperature and rainfall, greatly contributed to a significant soil acidification occurred in the urbanized environment.

  5. Territorialidad y conflictos interétnicos en la Costa Caribe de Nicaragua; Territorialidade e conflitos interetnicos na Costa Caribe da Nicarágua; Territoriality and Inter-ethnic Conflicts in the Caribbean Coast of Nicaragua

    Directory of Open Access Journals (Sweden)

    Víctor Manuel del Cid Lucero

    2015-01-01

    Full Text Available Resumen: En las relaciones socioculturales de las zonas de frontera de colonización en las Regiones Autónomas, norte y sur de la Costa Caribe de Nicaragua, se da un choque de culturas que adoptan distintas formas de expresión, como la invasión y despojo de los recursos naturales de los pueblos indígenas, hasta la discriminación abierta. En este artículo, con base  en la revisión bibliográfica,  se hace una reflexión sobre la cultura como forma de vida y la cultura como forma de producción y relaciones de poder, haciendo énfasis en la perspectiva que fue propuesta por Gramsci y las aportaciones de otros ensayistas que han abordado el tema; el propósito es demostrar que la construcción del sujeto autonómico se da en medio de luchas y contradicciones de clase y hegemonía que deben incorporarse como un aspecto esencial en la relación entre la Regiones Autónomas con el Estado Nacional.     Palabras claves: Territorialidad, Interculturalidad, colonización, conflicto       Resumo: Nas relações socioculturais das zonas de fronteira de colonização nas Regiões Autônomas, Norte e Sul, da Costa Caribe da Nicarágua, acontece um choque de cultural que adotam diferentes formas de expressão, como a invasão e o despojo dos recursos naturais dos povos indígenas, até a discriminação aberta. Neste artigo fará uma reflexão sobre a cultura como forma de vida e a cultura como forma de produção, dando ênfase na perspectiva  que  foi  proposta  por  Gramsci  e  pelas  abordagens  de  outros       ensaístas que trataram do tema; o propósito é demonstrar que a construção do sujeito autônomo se da no meio das lutas e contradições que devem incorporar como um aspecto essencial das relações entre as Regiões Autônomas com o Estado nacional.     Palavras-chave: Territorialidade, interculturalidade, colonização, conflito.       Abstract: A clash of cultures that adopt different forms of expression such

  6. 275 Damping-off Disease of two Pulp and Paper Forest Species ...

    African Journals Online (AJOL)

    Nekky Umera

    Damping-off Disease of two Pulp and Paper Forest Species. (Pinus caribaea Morelet and Pinus oocarpa Schiede) in the. Nursery (Pp. 275-282). Omokhua, G. E. - Department of Forestry and Wildlife Management,. Faculty of Agriculture, University of Port Harcourt, P. M. B. 5323, Port. Harcourt, Rivers State, Nigeria.

  7. Family variation in diameter growth and acoustic velocity in three 5 ...

    African Journals Online (AJOL)

    Family variation in diameter growth and acoustic velocity in three 5-year-old South African-grown Pinus elliottii × Pinus caribaea progeny trials established on three ... estate of Komatiland Forests (Pty) Ltd. The trials included the following controls: P. elliottii, P. patula, P. taeda, P. patula × P. tecunumanii and P. tecunumanii.

  8. 411 Pre and Post-Emergence Damping-Off of Chrysophyllum ...

    African Journals Online (AJOL)

    User

    seeds each were collected randomly from the seed lot for both species and germinated in trays using a completely ... Problems in identifying species of Fusarium and other pathogens as well as the existence of several systems of ..... Disease of two Pulp and Paper Forest Species (Pinus caribaea. Morelet and Pinus oocarpa ...

  9. La integración multinacional latinoamericana y caribeña: un enfoque desde la prospectiva crítica y participativa

    Directory of Open Access Journals (Sweden)

    Salazar Luis Suárez

    2005-01-01

    Full Text Available A partir de los principales enunciados teórico-prácticos de la denominada "prospectiva crítica", luego de tomar posición frente a las discusiones que se están desarrollando en la actualidad en torno a las implicaciones de "la globalización" y del "fenómeno imperialista", así como de realizar una síntesis de los diferentes componentes de lo que su autor ha venido denominando "un nuevo orden panamericano", el artículo realiza un análisis crítico del estado actual de los diferentes proyectos de integración multinacional que se están desarrollando en América Latina y el Caribe: el Sistema de Integración Centroamericano (SICA, la Comunidad del Caribe (CARICOM, la Comunidad Andina de Naciones (CAN y el Mercado Común del Sur (MERCOSUR. A partir de ese análisis -y tomando en cuenta algunos de los enunciados de la Iniciativa Bolivariana para las Américas (ALBA, recientemente dados a conocer por los presidentes de la República Bolivariana de Venezuela, Hugo Chávez y Fidel Castro, respectivamente- el autor propone algunas ideas vinculadas a lo que denomina "un nuevo paradigma para la integración multinacional de América Latina y el Caribe" que, al unísono, sea capaz de confrontar la "integración coercitiva" que (a través del ALCA y de los TLC está impulsando el gobierno de los Estados Unidos en consuno con algunos gobiernos del hemisferio occidental, así como de superar los limitados resultados del "regionalismo abierto" impulsado, desde hace una década, por la Comisión Económica para América Latina (CEPAL.

  10. Los hidrocarburos: factor estratégico dinamizador de la integración energética latinoamericana y caribeña

    Directory of Open Access Journals (Sweden)

    César Prieto Oberto

    2014-01-01

    Full Text Available El presente estudio describe el recorrido de los países latinoamericanos en la búsqueda de caminos hacia su integración. Luego de explicar el concepto de integración, se pasa a diferenciar sus primeras prácticas de los nuevos criterios que llevan a la importancia y necesidad de la integración energética, especialmente en el área de los hidrocarburos, hasta llegar a la creación de Petroamérica y a sus componentes Petroandina, Petrocaribe y Petrosur. Se hace un rápido enfoque de Petrocaribe, capítulo que ha tenido el mayor dinamismo dentro de Petroamérica. Luego de mencionar las principales organizaciones creadas históricamente en América Latina y el Caribe en la búsqueda de ensayos exitosos de integración fundamentadas en lo comercial, se señala que el mayor éxito se ha logrado con Petrocaribe, surgida a partir de la Alianza Bolivariana para los Pueblos de Nuestra América-Tratado de Comercio de los Pueblos (ALBA-TCP, que agrupa a varios países de Centroamérica y el Caribe. Este estudio adopta una metodología documental descriptiva y pretende dar una explicación del proceso histórico y político que ha permitido los avances que ha alcanzado, y, visto desde la perspectiva de Venezuela, ha consolidado un nuevo mapa de relaciones energéticas en la región, que ha dado en denominarse Integración Energética Latinoamericana y Caribeña

  11. Vulnerabilidad socio­económica de los agricultores frente a huracanes en las islas de providencia y santa catalina, caribe colombiano

    OpenAIRE

    Velásquez Calderón, Carolina; Santos ­ Martínez2, Adriana

    2011-01-01

    La región del Gran Caribe es una zona que ha sido frecuentemente impactada por huracanes, y la agricultura ha sido uno los sectores productivos más afectados. En las islas de Providencia y Santa Catalina, el paso del huracán Beta en octubre de 2005 dejó impactos severos, principalmente en este sector, lo que demandó investigaciones para contribuir a la gestión del riesgo. El objetivo de la presente investigación fue estimar la vulnerabilidad socio­económica de los agricultores de las islas de...

  12. Iniciativa Regional de Reforma del Sector de la Salud en América Latina y el Caribe The Latin America and Caribbean Regional Health Sector Reform Initiative

    OpenAIRE

    Pedro Crocco; Patricia Schroeder; María Teresa Villen; Edwina Yen

    2000-01-01

    Muchos países de América Latina y el Caribe están introduciendo reformas que pueden influir profundamente en la forma como se prestan los servicios de salud y en quienes los reciben. Tanto en la Cumbre de las Américas de 1994 como en la "Reunión Especial sobre Reforma del Sector de la Salud" de 1995, organizada por la Organización Panamericana de la Salud/Organización Mundial de la Salud (OPS/OMS), el Banco Interamericano de Desarrollo, el Banco Mundial y otros organismos multilaterales y bil...

  13. ENTRE EL CANON DE LA LITERATURA OCCIDENTAL Y LAS TRADICIONES NARRATIVAS SUBALTERNAS: TENSIONES Y SOLU-CIONES EN LA RECEPCIÓN DE LA NOVELA DEL CARIBE COLOMBIANO

    Directory of Open Access Journals (Sweden)

    Juan Moreno Blanco

    2017-03-01

    Full Text Available A propósito de quatro romances de três escritores do Caribe colom-biano – Manuel Zapata Olivella, Gabriel García Márquez y Germán Espino-sa –, o presente artigo busca colocar em xeque uma teoria sobre a relação entre literatura e oralidade. Pretende-se mostrar que esta teoria, como toda teoria, pode, não obstante suas vantagens, contribuir para perpetuar frontei-ras e hieraquias canônicas que historicamente têm vivido em harmonia com as ideologias hegemônicas da ciudade letrada.

  14. “Agriculturización” y cambios en el paisaje. El banano en el Atlántico/Caribe de Costa Rica (1870-1930)

    OpenAIRE

    Andrea Montero Mora; Ronny Viales Hurtado

    2014-01-01

    En Costa Rica el cultivo comercial del banano inició en la década de 1870 en el Atlántico/Caribe costarricense. Su impulso debe comprenderse en el contexto del desarrollo del export led growth, que consolidó un estilo de capitalismo agrario basado en la agriculturización/ganaderización. El presente artículo pretende acercarse a la huella visible que dejó la actividad bananera durante su primer ciclo, pues la plantación a gran escala provocó cambios en el paisaje. Comenzaremos con una sucinta ...

  15. El acaparamiento de tierras en América Latina y el Caribe visto desde una perspectiva internacional más amplia

    OpenAIRE

    Borras, Saturnino; Franco, Jennifer; Kay, Cristóbal; Spoor, Monique

    2012-01-01

    textabstractIntroducción y mensajes claves Este documento se basa en la investigación empírica que fue encomendada por la Organización de las Naciones Unidas para la Alimentación y la Agricultura (FAO) sobre las condiciones y tendencias del ―acaparamiento de tierras‖ en 17 países de América Latina y el Caribe (véase el Anexo para una lista completa de los estudios, así como el documento síntesis correspondiente; FAO, 2011). Los 17 estudios se concluyeron a mediados de 2011. El marco analítico...

  16. ¿EL FINAL DE LA CURVA DE KUZNETSDE CARBONO? Un análisis semiparamétrico para la América Latinay el Caribe

    OpenAIRE

    Mariana Zilio; M. Ángeles Caraballo

    2014-01-01

    La curva de Kuznets de carbono ha sido un tema ampliamente estudiado por la economía ambiental empírica y altamente controversial debido sobre todo a sus consecuencias para la elaboración política contra el cambio climático. Este trabajo está dirigido a analizar la relación entre emisiones de dióxido de carbono y pro-ducto para un conjunto de países de la América Latina y el Caribe utilizando un enfoque semiparamétrico. Los resultados confirman la inexistencia de una curva de Kuznets de carbo...

  17. Paleoclimatic implications of glacial and postglacial refugia for Pinus pumila in western Beringia

    Energy Technology Data Exchange (ETDEWEB)

    Anderson, P M; Lozhkin, A V; Solomatkina, T B; Brown, T A

    2010-02-05

    Palynological results from Julietta Lake currently provide the most direct evidence to support the existence of a glacial refugium for Pinus pumila in mountains of southwestern Beringia. Both percentages and accumulation rates indicate the evergreen shrub survived until at least {approx}19,000 14C yr B.P. in the Upper Kolyma region. Percentage data suggest numbers dwindled into the late glaciation, whereas pollen accumulation rates point towards a more rapid demise shortly after {approx}19,000 14C yr B.P. Pinus pumila did not re-establish in any great numbers until {approx}8100 14C yr B.P., despite the local presence {approx}9800 14C yr B.P. of Larix dahurica, which shares similar summer temperature requirements. The postglacial thermal maximum (in Beringia {approx}11,000-9000 14C yr B.P.) provided Pinus pumila shrubs with equally harsh albeit different conditions for survival than those present during the LGM. Regional records indicate that in this time of maximum warmth Pinus pumila likely sheltered in a second, lower-elevation refugium. Paleoclimatic models and modern ecology suggest that shifts in the nature of seasonal transitions and not only seasonal extremes have played important roles in the history of Pinus pumila over the last {approx}21,000 14C yr B.P.

  18. Afrodescendentes na América Latina e Caribe: novos caminhos, novas perspectivas em um contexto global multicultural

    Directory of Open Access Journals (Sweden)

    Carlos Agudelo

    2014-08-01

    Full Text Available Nos últimos anos, vários países da América Latina e do Caribe promoveram reformas legislativas e institucionais com o objetivo de reconhecer e afirmar o caráter multiétnico e multicultural da nação. Esse movimento foi identificado como um “giro multicultural” que começou a ser implantado desde o final dos anos 80. Em boa parte desses países, a categoria de alteridade, antes atribuída especialmente aos povos indígenas, foi estendida às populações de origem africana que, dessa maneira, ganharam maior visibilidade enquanto populações culturalmente diferenciadas. É nesse contexto que o conceito de afrodescendente adquire um status quase generalizado no seio das instituições internacionais e estatais e entre os movimentos políticos, sociais e culturais da região, sem que com isso desapareçam outras formas de denominação nacional relativas a essas populações. Verifica-se, também,  uma diversidade de experiências de reconhecimento das populações afrodescendentes nos mais diversos países do continente americano. O texto que propomos aborda os artigos do dossiê que aqui se apresenta e que tem como objetivo principal apresentar essa diversidade de experiências e romper com o desconhecimento que ainda existe, especialmente no Brasil, da realidade das condições e demandas das populações afrodescendentes nos países latino-americanos e caribenhos.  palavras-chave: afrodescendentes, américa latina e caribe, introdução, novas perspectivas. --- Afrodescendants in Latin America and the Caribbean: new paths, new perspectives in a multicultural global context Over the last few years, several countries in Latin America and the Caribbean have promoted legislative and institutional reforms in order to acknowledge and confirm the multiethnic and multicultural character of their nations. This movement was identified as a "multicultural spin" that was implemented in the late 80s. In most of these countries, the

  19. Una sala de arbitraje de inversión para Suramérica y El Caribe

    Directory of Open Access Journals (Sweden)

    Pedro Duarte LLovera

    2015-03-01

    Full Text Available En tiempos de crisis capitalista e inestabilidad global, el nuevo regionalismo alternativo surge tanto como un puente y como un escudo entre los países en desarrollo y la incertidumbre global. Desde la Cumbre de las Américas de 2004, América del Sur ha ido desarrollando una nueva identidad regional, que no encaja en los conceptos actuales de regionalismo en América del norte, Europa o Asia. Este neo regionalismo que representa ALBA, la Unión de Naciones Suramericanas (UNASUR y la CELAC, refleja las heterogéneas configuraciones económicas, sociales y políticas de las fuerzas sociales y de orden político, que son únicas a nuestro continente. En tal sentido, se requiere una recta ordenación jurídica y la creación de un sistema integral de resolución de controversias que responda a nuestra realidad, sin la injerencia de agentes externos, pues tenemos las capacidades, las fortalezas y los juristas para construir una fuerte y poderosa neo institucionalidad de justicia que en caso de diferencias, permita entregar a este sistema de integración suramericano y sus integrantes una adecuada y eficaz seguridad jurídica, indispensable para seguir avanzando. Como parte integral del mismo se propone la creación de una Sala de Arbitraje y Mediación en materia de inversiones con carácter de permanencia e identidad suramericana y caribeña, para dar respuesta adjetiva y procesal a otras normas de relación internacional aceptadas por los países miembros, para así evitar demandas exageradas ante el CIADI, como el caso Exxon Mobil versus PDVSA.

  20. Tunable diode laser in-situ CH4 measurements aboard the CARIBIC passenger aircraft: instrument performance assessment

    Science.gov (United States)

    Dyroff, C.; Zahn, A.; Sanati, S.; Christner, E.; Rauthe-Schöch, A.; Schuck, T. J.

    2014-03-01

    A laser spectrometer for automated monthly measurements of methane (CH4) mixing ratios aboard the CARIBIC passenger aircraft is presented. The instrument is based on a commercial Fast Greenhouse Gas Analyser (FGGA, Los Gatos Res.), which was adapted to meet the requirements imposed by unattended airborne operation. It was characterised in the laboratory with respect to instrument stability, precision, cross sensitivity to H2O, and accuracy. For airborne operation, a calibration strategy is described that utilises CH4 measurements obtained from flask samples taken during the same flights. The precision of airborne measurements is 2 ppb for 10 s averages. The accuracy at aircraft cruising altitude is 3.85 ppb. During aircraft ascent and descent, where no flask samples were obtained, instrumental drifts can be less accurately determined and the uncertainty is estimated to be 12.4 ppb. A linear humidity bias correction was applied to the CH4 measurements, which was most important in the lower troposphere. On average, the correction bias was around 6.5 ppb at an altitude of 2 km, and negligible at cruising flight level. Observations from 103 long-distance flights are presented that span a large part of the northern hemispheric upper troposphere and lowermost stratosphere (UT/LMS), with occasional crossing of the tropics on flights to southern Africa. These accurate data mark the largest UT/LMS in-situ CH4 dataset worldwide. An example of a tracer-tracer correlation study with ozone is given, highlighting the possibility for accurate cross-tropopause transport analyses.

  1. Calidad de agua potable y su efecto en la salud de la comunidad de Kamla, Costa Caribe Norte de Nicaragua

    Directory of Open Access Journals (Sweden)

    Allan Ray Taylor Tórrez

    2017-08-01

    Full Text Available Esta investigación se realizó en la comunidad indígena de Kamla en la Región Autónoma de la Costa Caribe Nicaragüense (RACCN. Se tomaron muestras en diecisiete sitios, como los abastecedores de agua. En cada sitio se valoraron los parámetros físico-químicos: oxígeno disuelto, pH, temperatura, turbidez, demanda bioquímica, nitratos, fosfatos, sólidos totales disueltos; despuntando dos parámetros (pH y DBO5, como los que están alterando la calidad; y, desde el punto de vista bacteriológico fueron: Coliformes fecales y Escherichia coli, datos que presentan una contaminación alta del agua examinada, según las comparaciones con la Norma Nicaragüense (NTON 09 001 99 y Norma CAPRE. En relación a los resultados del método ICA, clasificaron de regular la calidad del agua superficial, requiriendo, por tanto, de un tratamiento potabilizador adecuado. Además, se realizó una valoración de macro invertebrados bentónicos en los ríos seleccionados para poder establecer el índice biológico de calidad de estas aguas, con resultados negativos. Los resultados del agua de los pozos, muestran que no son aptas para el consumo humano en las condiciones actuales, ya que presentan altos contenidos de bacterias Coliformes fecales y Escherichia coli, requiriendo de un tratamiento de desinfección intensiva. Se establecen medidas preventivas y de mitigación para mejorar la calidad del recurso hídrico en la comunidad de Kamla, lo que redundará en mejorar la calidad de vida de los habitantes de la comunidad.  

  2. Highly effective fog-water collection with Pinus canariensis

    Science.gov (United States)

    Groh, A.

    2010-07-01

    Fog-collecting nets require constant manpower in terms of maintainance. Also, those nets are made of artificial material, and they do not really fit into the natural environment. They are, by far, not as effective as plants that are specialised for catching humidity from the air. The probably most effective plant to serve this purpose is Pinus canariensis, a tree native to the Canary Islands. It is well-known for its capability of collecting air moisture, and has already been used for many centuries for this purpose. This tree would allow a much more effective and environmentally friendly way of supplying arid regions with drinking water than this could be done with fog-catching nets. Moreover, it would also help to establish or re-establish vegetation in a natural way. Agriculture would profit from it, too, because vegetables could be produced, watered with the help of P. canariensis. In those places, where the net-projects are currently running, it is the right time now to plant P. canariensis seedlings underneath the nets, which they will soon replace. The surface of the trees is much larger than the surface of the nets, thus enabling much more water to condensate. Within a few years, a population of P. canariensis will be established that collects many times more water than the nets. With regard to ecological aspects, the introduction of P. canariensis into the environments concerned do not cause a problem, since in those desert areas, there are no native trees that could be superseded, and the P. canariensis trees are easy to control. They are a natural alternative to the unnatural plastic nets, and can even help to enhance any local flora.

  3. Ectomycorrhizal fungal communities in endangered Pinus amamiana forests.

    Science.gov (United States)

    Murata, Masao; Kanetani, Seiichi; Nara, Kazuhide

    2017-01-01

    Interactions between trees and ectomycorrhizal (ECM) fungi are critical for the growth and survival of both partners. However, ECM symbiosis in endangered trees has hardly been explored, complicating conservation efforts. Here, we evaluated resident ECM roots and soil spore banks of ECM fungi from endangered Pinus amamiana forests on Yakushima and Tanegashima Islands, Kagoshima Prefecture, Japan. Soil samples were collected from remaining four forests in the two islands. The resident ECM roots in soil samples were subjected to molecular identification. Soil spore banks of ECM fungi were analyzed via bioassays using a range of host seedlings (P. amamiana, P. parviflora, P. densiflora and Castanopsis sieboldii) for 6-8 months. In all remaining P. amamiana forests, we discovered a new Rhizopogon species (Rhizopogon sp.1), the sequence of which has no match amoung numerous Rhizopogon sequences deposited in the international sequence database. Host identification of the resident ECM roots confirmed that Rhizopogon sp.1 was associated only with P. amamiana. Rhizopogon sp.1 was far more dominant in soil spore banks than in resident ECM roots, and its presence was confirmed in nearly all soil samples examined across the major remaining populations. While Rhizopogon sp.1 did not completely lose compatibility to other pine species, its infection rate in the bioassays was highest in the original host, P. amamiana, the performance of which was improved by the infection. These results indicate that Rhizopogon sp.1 is very likely to have a close ecological relationship with endangered P. amamiana, probably due to a long co-evolutionary period on isolated islands, and to play the key role in seedling establishment after disturbance. We may need to identify and utilize such key ECM fungi to conserve endangered trees practically.

  4. Cytogenetic variability in pinus sylvestris L. populations experiencing anthropogenic influence

    International Nuclear Information System (INIS)

    Oudalova, A.; Geras'kin, S.; Vasiliev, D.; Dikarev, V.

    2004-01-01

    Techno-genic pollution has become one of the most significant ecological factors determining biosphere existence and development. An analysis of genetic consequences of the radiation accidents in the South Urals and Chernobyl has shown that mutation and recombination processes are considerably accelerated in plant and animal's populations experiencing techno-genic influence. This implies that there are complicated adaptation processes leading to changes in genetic structure of populations and increasing genetic load. Pinus sylvestris L. populations growing at the territory of the 'radon' Leningrad regional radioactive waste reprocessing enterprise and Sosnovy Bor town were monitored 6 years (1997-2002) by a set of cyto-genetical and morphological tests. Cytogenetic damage levels within intercalary meristem of needle as well as in root meristem of seedlings were found to significantly exceed corresponding controls. A higher radioresistance of the Scots pine seeds analyzed was demonstrated with an acute γ-radiation that also revealed a selection process directed at an enhancement of repair efficiency and resulting in a shift of mean values of radioresistance in populations towards higher values. An enlargement of variance of studied cytogenetic parameters was found in the populations experiencing techno-genic influence. This indicates, with an account of phenomenon of the enhanced radioresistance, that there are processes of cyto-genetical adaptation in the investigated regions. An analysis of the structure of ecological-genetical variability was carried out with the purpose of separating two components in the inter-population variability - the first is engaged to the genetically determined variability of biological characteristics intrinsic for this species, and the second is responsible for the variability originating from anthropogenic contamination of the natural habitat. Changes of these two types of variability were studied in dependence on time and techno

  5. Cytogenetic variability in pinus sylvestris L. populations experiencing anthropogenic influence

    Energy Technology Data Exchange (ETDEWEB)

    Oudalova, A.; Geras' kin, S.; Vasiliev, D.; Dikarev, V. [Russian Institute of Agricultural Radiology and Agroecology, Obninsk (Russian Federation)

    2004-07-01

    Techno-genic pollution has become one of the most significant ecological factors determining biosphere existence and development. An analysis of genetic consequences of the radiation accidents in the South Urals and Chernobyl has shown that mutation and recombination processes are considerably accelerated in plant and animal's populations experiencing techno-genic influence. This implies that there are complicated adaptation processes leading to changes in genetic structure of populations and increasing genetic load. Pinus sylvestris L. populations growing at the territory of the 'radon' Leningrad regional radioactive waste reprocessing enterprise and Sosnovy Bor town were monitored 6 years (1997-2002) by a set of cyto-genetical and morphological tests. Cytogenetic damage levels within intercalary meristem of needle as well as in root meristem of seedlings were found to significantly exceed corresponding controls. A higher radioresistance of the Scots pine seeds analyzed was demonstrated with an acute {gamma}-radiation that also revealed a selection process directed at an enhancement of repair efficiency and resulting in a shift of mean values of radioresistance in populations towards higher values. An enlargement of variance of studied cytogenetic parameters was found in the populations experiencing techno-genic influence. This indicates, with an account of phenomenon of the enhanced radioresistance, that there are processes of cyto-genetical adaptation in the investigated regions. An analysis of the structure of ecological-genetical variability was carried out with the purpose of separating two components in the inter-population variability - the first is engaged to the genetically determined variability of biological characteristics intrinsic for this species, and the second is responsible for the variability originating from anthropogenic contamination of the natural habitat. Changes of these two types of variability were studied in dependence on

  6. Modeling seed dispersal distances: implications for transgenic Pinus taeda.

    Science.gov (United States)

    Williams, Claire G; LaDeau, Shannon L; Oren, Ram; Katul, Gabriel G

    2006-02-01

    Predicting forest-tree seed dispersal across a landscape is useful for estimating gene flow from genetically engineered (GE) or transgenic trees. The question of biocontainment has yet to be resolved, although field-trial permits for transgenic forest trees are on the rise. Most current field trials in the United States occur in the Southeast where Pinus taeda L., an indigenous species, is the major timber commodity. Seed dispersal distances were simulated using a model where the major determinants were: (1) forest canopy height at seed release, (2) terminal velocity of the seeds, (3) absolute seed release, and (4) turbulent-flow statistics, all of which were measured or determined within a P. taeda plantation established from seeds collected from wild forest-tree stands at the Duke Forest near Durham, North Carolina, USA. In plantations aged 16 and 25 years our model results showed that most of the seeds fell within local-neighborhood dispersal distances, with estimates ranging from 0.05 to 0.14 km from the source. A fraction of seeds was uplifted above the forest canopy and moved via the long-distance dispersal (LDD) process as far as 11.9-33.7 km. Out of 10(5) seeds produced per hectare per year, roughly 440 seeds were predicted to be uplifted by vertical eddies above the forest canopy and transported via LDD. Of these, 70 seeds/ha traveled distances in excess of 1 km from the source, a distance too great to serve as a biocontainment zone. The probability of LDD occurrence of transgenic conifer seeds at distances exceeding 1 km approached 100%.

  7. Chemical properties of tannic extracts from bark of Pinus oocarpa and their use as adhesive

    Directory of Open Access Journals (Sweden)

    Michel Cardoso Vieira

    2014-03-01

    Full Text Available This work evaluated the properties of aqueous extracts obtained from the bark of Pinus oocarpa under addition of sodium sulfite and sodium bisulfite and the possibility of employment of tannins from the bark as an adhesive for bonding wood. After evaluation of the chemical properties of tannic extracts it was decided to employ the extraction with distilled water under addition of / 5% sodium sulfite to prepare for the tannin-formaldehyde adhesive. Adhesive phenol formaldehyde and urea-formaldehyde were modified with 10% tannin Pinus oocarpa and the effect of this addition on the quality of the adhesive was evaluated. The addition from the bark of Pinus oocarpa showed that it is possible to use pure tannin as an adhesive because of its good gluing characteristics. The addition of tannic extract to synthetic adhesives contributed to increase viscosity values. Thus the substitution of synthetic adhesives by tannins is possible only up to 10%.

  8. The characteristics of soil and water loss in Pinus Massoniana forest in Quaternary red soil area of south China

    Science.gov (United States)

    Song, Yuejun; Huang, Yanhe; Jie, Yang

    2017-08-01

    The soil and water loss in Pinus massoniana forests is an urgent environmental problem in the red soil region of southern China.Using the method of field monitoring, by analogy and statistical analysis, The characteristics of soil and water loss of Pinus massoniana forests in Quaternary red soil region under 30 rainfall were analyzed,the results show that the relationship models of rainfall,runoff and sediment of pure Pinus massoniana plot were slightly different from the naked control plot,were all the univariate quadratic linear regression models.the contribution of runoff and sediment in different rain types were different, and the water and soil loss in Pinus massoniana forest was most prominent under moderate rain.The merging effect of sparse Pinus massoniana forest on raindrop, aggravated the degree of soil and water loss to some extent.

  9. Growth decline assessment in Pinus sylvestris L. and Pinus nigra Arnold. forest by using 3-PG model

    Energy Technology Data Exchange (ETDEWEB)

    Navarro-Cerrillo, R.M.; Beira, J.; Suarez, J.; Xenakis, G.; Sánchez-Salguero, R.; Hernández-Clemente, R.

    2016-07-01

    Aim of the study: We assessed the ability of the 3-PG process-based model to accurately predict growth of Pinus sylvestris and P. nigra plantations across a range of sites, showing declining growth trends, in southern Spain. Area of study: The study area is located in “Sierra de Los Filabres” (Almería). Material and methods: The model was modified in fifteen parameters to predict diameter (DBH, cm), basal area increment (BAI, cm2 yr-1) and leaf area index (LAI, m2 m-2) in healthy trees and trees showing declining growth. We assumed that a set of specific physiological parameters (stem partitioning ratio-pFS20, maximum litterfall rate-γFx, maximum canopy conductance-gCx, specific leaf area for mature aged stands-σ1, age at which specific leaf area = ½ (σ0 + σ1), age at full canopy cover-tc, and canopy boundary layer conductance-gB) included in 3-PG would be suitable for predicting growth decline related to climate conditions. The calibrated model was evaluated using dendrochronological and LAI data obtained from plots. Main results: Observed and simulated DBH showed a high correlation (R2 > 0.99) between modelled and measured values for both species. In contrast, modelled and observed BAI showed lower correlation (R2 < 0.68). Sensitivity analysis on 3-PG outputs showed that the foliage parameters - maximum litterfall rate, maximum canopy conductance, specific leaf area for mature aged stands, age at which specific leaf area, and age at full canopy cover - were important for DBH and BAI predictions under drought stress. Research highlights: Our overall results indicated that the 3-PG model could predict growth response of pine plantations to climatic stress with desirable accuracy in southern Spain by using readily available soil and climatic data with physiological parameters derived from experiments. (Author)

  10. [Acceleration of Embryonic Development of Pinus sibirica Trees with a One-Year Reproductive Cycle].

    Science.gov (United States)

    Tret'yakova, I N; Lukina, N V

    2016-01-01

    The study of the formation of embryonic structures in Pinus sibirica forms with a one-year reproductive cycle showed that the acceleration of the embryonic process manifested itself as a reduction of the coenocytic stage of the female gametophyte development (1.5 months instead of 1 year). The egg was not fertilized because of the asynchronous maturation of male and female gametophytes. Seeds without embryos were formed. We assumed that the acceleration of the reproductive process in Pinus sibirica was caused by a mutation in the female generative organs.

  11. Chemical, Antioxidant and Antimicrobial Investigations of Pinus cembra L. Bark and Needles

    OpenAIRE

    Apetrei, Cristina Lungu; Tuchilus, Cristina; Aprotosoaie, Ana Clara; Oprea, Adrian; Malterud, Karl Egil; Miron, Anca

    2011-01-01

    The chemical constituents and biological activity of Pinus cembra L. (Pinaceae), native to the Central European Alps and the Carpathian Mountains, are not well known. The aim of the present work was to examine the phenolic content, antioxidant and antimicrobial effects of hydromethanolic extracts of Pinus cembra L. bark and needles. Bark extract had higher concentrations of total phenolics (299.3 vs. 78.22 mg gallic acid equivalents/g extract), flavonoids (125.3 vs. 19.84 mg catechin equivale...

  12. Reproduction ecology of Pinus halepensis : a monoecious, wind-pollinated and partially serotinous Mediterranean pine tree

    OpenAIRE

    Goubitz, Shirrinka

    2001-01-01

    Fire is an important factor in the evolution and ecology of Mediterranean plant species. The fire frequency has increased in the 20st century. Pines are the most important tree species in the area. Pinus halepensis is the only natural pine in parts of the east Mediterranean basin, such as Israel and Jordan. This pine tree is a monoecious, wind-pollinated tree. Pinus halepensis regenerates in absence of fire as well as after fire, because it is a partially serotinous species. This study aims t...

  13. Análisis de la capacidad de servicio de mantenimiento de la cadena TRD Caribe Sancti Spíritus usando la simulación.

    Directory of Open Access Journals (Sweden)

    Manuel Hung Varela

    2014-09-01

    Full Text Available La investigación, tiene su origen en la necesidad de conocer, si la unidad de servicio de mantenimiento en la Cadena TRD Caribe Sancti Spíritus, es capaz de satisfacer o no las demandas de la Cadena, ya que se presenta una tendencia al crecimiento en la demanda, así como en las quejas por parte de los clientes que aseveraban largas esperas para ser servidos. Se definió el procedimiento para la simulación por eventos discretos a utilizar (Barceló Bugeda, 1996. Se definieron las fronteras del sistema, se construyó el modelo matemático para el sistema objeto de estudio y se programó en el software especializado Promodel 4.0. Para la simulación del modelo matemático, se recopiló información a través de técnicas como el muestreo aleatorio. El modelo fue verificado y validado (Barceló Bugeda, 1996; Aracil Santonja, 1995. Se simuló el modelo, haciendo uso del método de los lotes. Se procesaron los resultados de la simulación, y se concluyó que la unidad de servicio de mantenimiento no dispone de capacidad suficiente bajo las condiciones actuales para satisfacer las demandas de la cadena TRD Caribe en el territorio de Sancti Spíritus.

  14. ¿EL FINAL DE LA CURVA DE KUZNETSDE CARBONO? Un análisis semiparamétrico para la América Latinay el Caribe

    Directory of Open Access Journals (Sweden)

    Mariana Zilio

    2014-01-01

    Full Text Available La curva de Kuznets de carbono ha sido un tema ampliamente estudiado por la economía ambiental empírica y altamente controversial debido sobre todo a sus consecuencias para la elaboración política contra el cambio climático. Este trabajo está dirigido a analizar la relación entre emisiones de dióxido de carbono y pro-ducto para un conjunto de países de la América Latina y el Caribe utilizando un enfoque semiparamétrico. Los resultados confirman la inexistencia de una curva de Kuznets de carbono en la región y ofrecen pruebas en favor de un proceso de relo-calización de emisiones, verificando la hipótesis del paraíso de contaminadores en los países de menores ingresos. En este contexto, “esperar y crecer” es una solución totalmente inviable para la situación ambiental en la América Latina y el Caribe. En su lugar, surge con urgencia la necesidad de crear una política climática dirigida a adaptar y mitigar los efectos del cambio climático en la región.

  15. Presencia de bacterias asociadas a nieve marina en arrecifes influenciados por escorrentía continental del Caribe colombiano: primer acercamiento

    Directory of Open Access Journals (Sweden)

    Hernán Alejandro Henao-Castro

    2015-06-01

    Full Text Available Parte del deterioro de los arrecifes de coral se atribuye al efecto del aporte de agua dulce cargada de nutrientes y sedimentos finos. Estas condiciones favorecen la formación de nieve marina lodosa que transporta gran carga de bacterias que pueden ser patógenos de corales. Por lo anterior, se estudió la presencia de bacterias asociadas a nieve marina lodosa en una zona arrecifal del Caribe colombiano en un gradiente de distancia a la desembocadura del canal del Dique (Cartagena. Por medio de técnicas moleculares PCR-DGGE, se registró baja riqueza, con bandas representativas de siete bacterias diferentes. El número de especies varió según el sitio, pero no hubo relación con la cercanía a la fuente de escorrentía. Como estudio pionero, sirve como punto de partida para estudios en arrecifes del Caribe colombiano impactados por escorrentía.

  16. Repensar el Caribe desde los Estudios Culturales: Literatura, Nación, Racialidad y Género en Donnete Francis, April Shemak y Rosamond King

    Directory of Open Access Journals (Sweden)

    Marcelo José Cabarcas Ortega

    2015-01-01

    Full Text Available Desde los estudios literarios y culturales, estas autoras se unen a un creciente número de expertas interesadas en analizar el impacto de las dinámicas neoliberales en los aspectos étnicos, sexuales y de género en el Caribe, ya sea en el archipiélago o en sus bordes continentales. Respecto a este análisis se pueden afirmar, por lo menos, dos rasgos relevantes: el primero es la importancia otorgada a las nuevas diásporas y su efecto en la actualidad; el segundo es la necesidad de ampliar el archivo literario mediante la integración de la música, la fotografía y el performance al proceso tradicional de hermenéutica. Así, al plantearse formas más incluyentes de interpretación, la crítica busca superar lugares comunes ya desgastados por el excesivo uso y sintonizarse con las inquietudes de creadoras y creadores jóvenes respecto a las realidades de la migración y su influjo en el actual redimensionamiento político del cuerpo. En esa medida, April Shemak, Donnete Francis y Rosamond King y otras escritoras problematizan la idea de un Caribe de puro contacto y difusión.

  17. As práticas discursivas do banco mundial: políticas educacionais na América Latina e no Caribe

    Directory of Open Access Journals (Sweden)

    Andréa Villela Mafra da Silva

    2016-12-01

    Full Text Available Neste trabalho, utiliza-se como referencial teórico e metodológico a Análise Crítica do Discurso formulada por Norman Fairclough para caracterizar as práticas discursivas nas quais a publicação mais recente do Banco Mundial se inscreve. Trata-se do livro Professores Excelentes: Como melhorar a aprendizagem dos estudantes na América Latina e no Caribe de autoria de Barbara Bruns, Javier Luque e outros colaboradores. Essa publicação trata do desempenho dos professores da educação básica na América Latina e no Caribe e, como decorrência, busca compartilhar as políticas de formação docente que estão sendo implementadas nesses locais. A conclusão da pesquisa é que os baixos padrões para o ingresso no magistério têm produzido resultados inexpressivos na educação.

  18. Aproximaciones teóricas para repensar el diálogo África, América Latina y el Caribe

    Directory of Open Access Journals (Sweden)

    Maguemati Wabgou

    2007-07-01

    Full Text Available La exploración de las teorías de la autonomía, el realismo periférico, inversión extranjera directa (ied y su aplicación junto con la de triangulación, ofrecen fundamentos para aprehender el diálogo horizontal entre África, América Latina y el Caribe. La pretensión de las dos primeras teorías de índole esencialmente política –conllevando lo económico y lo cultural– es concientizar a los países latinoamericanos, caribeños y africanos acerca de su situación de subordinación y dependencia frente a las potencias mundiales, situación que les impide elaborar y poner en marcha proyectos comunes como bloque. De hecho, para la realización de estos proyectos es posible recurrir a la teoría de ied y el método de la triangulación como herramientas de consolidación de alianzas horizontales.

  19. The use of electroconvulsive therapy in Latin America and the Caribbean Uso del tratamiento por electrochoques en América Latina y el Caribe

    Directory of Open Access Journals (Sweden)

    Itzhak Levav

    1998-02-01

    Full Text Available En 1995 la OPS/OMS llevó a cabo una encuesta postal para investigar las características del uso del tratamiento por electrochoques (TEC en América Latina y en el Caribe de habla inglesa y holandesa. Según los resultados de la encuesta, el uso del TEC difiere en las dos subregiones. La técnica se utiliza ampliamente en América Latina y solo esporádicamente en el Caribe. Asimismo, su uso varía dentro de cada país y ha sufrido cambios a lo largo del tiempo. Solamente la mitad de los países de América Latina tienen normas técnicas para la aplicación del TEC. La administración de anestesia y de relajantes musculares durante el mismo y la obtención de consentimiento informado todavía no son prácticas reglamentarias en las instituciones psiquiátricas de América Latina. La toma de medidas para subsanar estos déficit ayudará a borrar la estereotípica imagen negativa que esta intervención suele evocar.

  20. LA REGIÓN HISTÓRICA MARGARITEÑA Y SU INFLUENCIA EN LA CONFORMACIÓN DE REDES COMERCIALES EN EL CARIBE

    Directory of Open Access Journals (Sweden)

    Yonezka Rondón

    2009-01-01

    Full Text Available El propósito de este ensayo es analizar la influencia de la Región Histórica margariteña en la conformación de redes comerciales en el Caribe a partir del eje político y económico: La Asunción- Pampatar como resultado de la actividad agropecuaria y del intercambio comercial que mantuvo tanto con Tierra Firme como con las Antillas y Europa. Asimismo, se analiza y el crecimiento de un comercio ilícito que se tejió alrededor de la actividad perlera y el tráfico negrero desde el siglo XVI hasta el XVIII. Se desarrolla con esta investigación el estudio de las interrelaciones de la Isla de Margarita con los espacios vecinos y sus ciudades tal como es el caso del eje La Guaira-Caracas, Guayana, Barcelona, Cumaná, Trinidad-Puerto España, Puerto Rico y Santo Domingo lo cual produjo redes comerciales caribeñas de gran importancia y significación.

  1. El Movimiento pro-Regionalismos Alternativos frente a la Nueva Relación Estratégica América Latina, Caribe - Unión Europea. Reflexiones desde una perspectiva de género

    NARCIS (Netherlands)

    R.A. Icaza Garza (Rosalba)

    2007-01-01

    textabstractIntroducción: El 11 de Mayo del 2006, en el marco de la 4ª. Cumbre de Jefes de Estado y de Gobierno de América Latina, el Caribe y la Unión Europea (ALCUE) los y las representantes oficiales posaron para la tradicional foto del recuerdo.1 Instantes previos al fin de esta actividad,

  2. Bibliografía sobre comercio marítimo, contrabando y piratería en las Antillas y el Caribe (artículos, ponencias y tesis desde 1980

    Directory of Open Access Journals (Sweden)

    Rodríguez Yunta, Luis

    1994-12-01

    Full Text Available Not available.

    Recopilación bibliográfica sobre comercio marítimo, contrabando y piratería en las Antillas y el Caribe, realizada sobre la base de la información disponible en las bases de datos América Latina (CSIC e Historical Abstract.

  3. Xylem hydraulic efficiency versus vulnerability in seedlings of four contrasting Mediterranean tree species (Cedrus atlantica, Cupressus sempervirens, Pinus halepensis and Pinus nigra)

    OpenAIRE

    Froux, Fabienne; Huc, Roland; Ducrey, Michel; Dreyer, Erwin

    2002-01-01

    International audience; We studied the xylem hydraulic traits and anatomy of four diverse Mediterranean conifers to determine how these species protect themselves against catastrophic xylem failure. Cedrus atlantica, Cupressus sempervirens, Pinus nigra and P. halepensis seedlings were grown for two years in pots in a greenhouse under well-watered conditions. Measurements were conducted in April and September. The vulnerability to cavitation was lower in April in the two pines and cedar wherea...

  4. Seed source variation and conservation of Pinus wallichiana in India

    Directory of Open Access Journals (Sweden)

    Manisha Thapliyal

    2013-12-01

    Full Text Available Pinus wallichiana A.B. Jacks is an important component of the middle and high altitude Himalayan forests having large natural distribution ranging between 260 to 360 N latitude and 690 to 750 E longitudes. It is commonly known as Himalayan blue pine or blue pine, being indigenous to Himalayan Mountain regions and because of its bluish or grayish-green leaves. It is a five needle pine which gained world-wide attention for its resistance to blister rust among white pines. This species has been crossed successfully with other white pines and vigorous hybrids have been obtained. Considerable variation in morphological and anatomical characteristics of needles, cones and seeds in natural stands exists across the natural distribution of the species, especially in mesic and xeric habitats. These variations suggested the differentiation of this species in ecotypes or varieties as reported by various authors. However, the level of genetic diversity was found to be relatively high and the degree of genetic differentiation was low compared to other pines. The wide range of climatic conditions in the natural distribution of this pine is expected to result in high genetic variation within different populations of the species. The study aims to determine the nature and extent of variation present in the populations of the species in respect to cone and seed characteristics across its natural distribution. Seed of 17 seed sources from the states of Uttaranchal and Himachal Pradesh was collected and analyzed for cone characters (fresh weight of cones, cone length, cone width, specific gravity and seed characters (seed weight, moisture content, germination percent, cotyledon number. Significant variations have been observed in these traits among different seed sources of the species. The cone weight varied from 44.4 to114g and the higher cone weight was recorded at higher altitudes. The germination percent varied from 40 to 85 whereas cotyledon number varied

  5. Seed source variation and conservation of Pinus wallichiana in India

    Directory of Open Access Journals (Sweden)

    M. Thapliyal

    2008-09-01

    Full Text Available Pinus wallichiana A.B. Jacks is an important component of the middleand high altitude Himalayan forests having large natural distribution ranging between 260 to 360 N latitude and 690 to 750 E longitudes. It is commonly known as Himalayan blue pine or blue pine, being indigenous to Himalayan Mountain regions and because of its bluish or grayish-green leaves. It is a five needle pine which gained world-wide attention for its resistance to blister rust among white pines. This species has been crossed successfully with other white pines and vigorous hybrids have been obtained. Considerable variation in morphological and anatomical characteristics of needles, cones and seeds in natural stands exists across the natural distribution of the species, especially in mesic and xeric habitats. These variationssuggested the differentiation of this species in ecotypes or varieties as reported by various authors. However, the level of genetic diversity was found to be relatively high and the degree of genetic differentiation was low compared to other pines. Thewide range of climatic conditions in the natural distribution of this pine is expected to result in high genetic variation within different populations of the species. The study aims to determine the nature and extent of variation present in the populations of the species in respect to cone and seed characteristics across its natural distribution. Seed of 17 seed sources from the states of Uttaranchal and Himachal Pradesh was collected and analyzed for cone characters (fresh weight of cones, cone length, cone width, specific gravity and seed characters (seed weight, moisture content, germination percent, cotyledon number. Significant variations have beenobserved in these traits among different seed sources of the species. The cone weight varied from 44.4 to114g and the higher cone weight was recorded at higher altitudes.The germination percent varied from 40 to 85 whereas cotyledon number varied from 7

  6. Intra-annual nutrient flux in Pinus taeda.

    Science.gov (United States)

    Albaugh, Timothy J; Allen, H Lee; Stape, Jose L; Fox, Thomas R; Rubilar, Rafael A; Price, James W

    2012-10-01

    Intra-annual nutrient (nitrogen, phosphorus, potassium, calcium and magnesium) flux was quantified for Pinus taeda L. at a nutrient-poor, well-drained sandy site in Scotland County, NC, USA where a 2 × 2 factorial of irrigation and nutrition was applied in four replications in a 10-year-old stand with 1200 stems ha(-1). Treatments were applied with the goal of providing optimum nutrition (no nutritional deficiencies) and water availability. Component (foliage, branch, stem and root) nutrient content was estimated monthly for 2 years using nutrient concentration and phenology assessments combined with destructive harvests. Positive flux values indicated nutrient accumulation in the trees while negative values indicated nutrient loss from the trees. Fertilization significantly increased nitrogen, phosphorus, potassium, calcium and magnesium flux 140%, on average, over non-fertilized. Irrigation significantly increased calcium flux 28% while there was no significant irrigation effect on nitrogen, phosphorus, potassium or magnesium. Maximum nutrient fluxes (kg ha(-1) day(-1)) for non-fertilized and fertilized stands were 0.36 and 1.05 for nitrogen, 0.042 and 0.095 for phosphorus, 0.13 and 0.51 for potassium, 0.27 and 0.42 for calcium, and 0.04 and 0.12 for magnesium, respectively. Maximum flux was coincident with ephemeral tissue (foliage and fine root) development and likely would be higher in stands with more foliage than those observed in this study (projected leaf area indices were 1.5 and 3.0 for the non-fertilized and fertilized stands). Minimum nutrient fluxes (kg ha(-1) day(-1)) for non-fertilized and fertilized stands were -0.18 and -0.42 for nitrogen, -0.029 and -0.070 for phosphorus, -0.05 and -0.18 for potassium, -0.04 and -0.05 for calcium, and -0.02 and -0.03 for magnesium, respectively. Minimum fluxes were typically observed in the dormant season and were linked to foliage senescence and branch death. Foliage and branch component nutrient contents

  7. Mejoramiento genético del frijol rojo y negro mesoamericano para Centroamérica y El Caribe

    Directory of Open Access Journals (Sweden)

    Juan C. Rosas

    2000-01-01

    Full Text Available La producción de frijol en Centroamérica es llevada a cabo mayormente en laderas de suelos marginales, limitada por diversos factores bióticos y abióticos. Más de 350,000 t de este grano se producen en cerca de 0,5 millones de hectáreas, con rendimientos promedios de 678 kg/ha. La mayoría de los productores de frijol utilizan bajos insumos y muy pocas fincas están mecanizadas. El autoconsumo es alto; sin embargo, una alta proporción de este grano es comprado por intermediarios. En Honduras, el frijol es el sétimo cultivo en valor económico y es el de mayor rentabilidad entre el maíz, arroz y sorgo. Las dos clases comerciales más importantes en Centroamérica son el frijol rojo y negro pequeños (raza Mesoamérica. El mejoramiento de estos tipos de frijol se ha enfocado en el desarrollo de resistencia a enfermedades (mosaico común, mosaico dorado, antracnosis, mancha angular, roya, mustia hilachosa y bacteriosis común e insectos (principalmente picudo de la vaina; y tolerancia a baja fertilidad, sequía y calor. Programas adecuados de hibridación, evaluación y selección son usados para el desarrollo de cultivares con resistencia múltiple, alto rendimiento, buena adaptación y aceptación comercial. La ampliación de la base genética se obtiene usando fuentes de germoplasma Andino y Mesoamericano en la etapa de hibridación. La selección simultánea por varios caracteres y pruebas multilocalidades son utilizadas. Los viveros y ensayos de adaptación y rendimiento de líneas avanzadas son distribuídos a países de Centroamérica, México, y El Caribe. Las pruebas y validaciones en fincas y la liberación de variedades, son efectuadas por los programas nacionales de frijol de los países miembros de PROFRIJOL, en colaboración con el Zamorano, CIAT y el Bean/Cowpea CRSP

  8. Presencia de Salmonella spp. en un área del Caribe colombiano: un riesgo para la salud pública.

    Directory of Open Access Journals (Sweden)

    Johnny Durango

    2004-03-01

    Full Text Available Salmonella está asociada frecuentemente con la enfermedad diarreica aguda; la bacteria se propaga principalmente por la ingestión de alimentos o de aguas contaminadas o por personas infectadas que manipulan los alimentos. En Colombia no se conoce la distribución de los serotipos de Salmonella en los alimentos. El objetivo de este estudio fue el de establecer la frecuencia de Salmonella spp. en alimentos del Caribe colombiano. Se analizaron 636 muestras de alimentos obtenidas en ventas de comidas rápidas callejeras y en plazas de mercados de Barranquilla (n=245, Montería (n=222, Sincelejo (n=87 y Cartagena (n=82. El aislamiento de la bacteria se realizó por el método convencional de la Food and Drug Administration (FDA de los Estados Unidos. Se inocularon 25 g de cada muestra de alimento en 225 ml de caldo de preenriquecimiento; posteriormente, se inoculó 1 ml a los caldos de enriquecimiento y, finalmente, se sembraron en medios de cultivo selectivos para Salmonella. Las colonias sospechosas se identificaron por pruebas bioquímicas y serológicas convencionales para Salmonella. Se aislaron 47 (7,4% Salmonella spp. Del total de muestras de carne de res, 9,3% fueron positivas para Salmonella spp., 12,6% de chorizo, 7,9% de queso, 5,2% de carne de cerdo, 1,6% de pollo y 10,5% de arepa de huevo. Los principales serotipos encontrados fueron S. Anatum (26%, S. Newport (13%, S. Typhimurium (9%, S. Gaminara (9% y S. Uganda (9%. Este estudio permitió establecer la distribución de los serotipos de Salmonella spp. en alimentos de la Costa Atlántica colombiana. No se observaron diferencias estadísticas significativas entre los estratos 1 y 4, ni entre los estratos 2 y 3 (p>0,05, pero sí entre los estratos 1, 2 y 3 (p

  9. Conocimientos, creencias y prácticas de los adolescentes de la cultura Caribe en anticoncepción

    Directory of Open Access Journals (Sweden)

    Patricia Lapeira Panneflex

    2016-01-01

    Full Text Available Introducción: La tasa global de fecundidad en Colombia ha disminuido y el uso de los métodos anticonceptivos (MAC ha aumentado; sin embargo el inicio temprano de las relaciones sexuales cuando aún no se tienen los conocimientos necesarios que faciliten la sexualidad segura, induce al uso ineficaz con pérdida del potencial anticonceptivo. Materiales y Métodos: Estudio descriptivo de corte trasversal realizado con 64 adolescentes de un barrio de la ciudad de Santa Marta, Colombia, utilizando para ello un instrumento compuesto por tres dominios relacionados con conocimientos,  creencias y prácticas  sobre MAC.  Resultados: La edad media de los adolescentes fue de 16 años. El 65,6% conoce los MAC aunque únicamente 54,7% dice usarlos. El 71,9% piensan que las personas que usan los MAC son responsables e informadas. El 48,8% piensan que usar anticonceptivos tiene unos efectos secundarios como gordura y esterilidad. El método preferido es el preservativo y la decisión de utilizarlo la toma el hombre, y el inicio de las relaciones sexuales ocurre hoy a una edad muy temprana, hecho atribuido a la influencia cultural. Discusión: Los resultados de este estudio guardan relación con investigaciones realizados a nivel nacional e internacional, demuestran que el desconocimiento y las actitudes negativas sobre anticonceptivos son obstáculo para su uso. Conclusiones: Todos los participantes sustentaron conocimientos en anticonceptivos, existiendo vacíos en ese conocimiento y/o creencias sobre efectos secundarios que inciden negativamente en su uso: se les atribuye ocasionar aumento de peso esterilidad. El método más utilizado por los adolescentes es el preservativo. Cómo citar este artículo: Lapeira P, Acosta D, Vásquez M. Conocimientos, creencias  y prácticas de los adolescentes de la cultura Caribe en anticoncepción. Rev Cuid. 2016; 7(1: 1204-9. http://dx.doi.org/10.15649/cuidarte.v7i1.243

  10. Riesgos laborales en Medicina Veterinaria en América Latina y el Caribe. Revisión

    Directory of Open Access Journals (Sweden)

    Héctor D. Tarabla

    2017-12-01

    Full Text Available Los Médicos Veterinarios están expuestos a peligros físicos, biológicos, químicos y radiaciones. Los objetivos de este trabajo consisten en revisar sus accidentes laborales (AL y enfermedades profesionales (EP, factores y percepciones de riesgo, uso y disposición de elementos de protección personal (EPP en América Latina y el Caribe. La frecuencia de profesionales que sufren accidentes, in labore, es muy alta; con la consecuente pérdida de días laborales. Los AL varían según la especie animal. Los más frecuentes son: mordeduras, rasguños, atropellamientos y aprisionamientos por animales, así como heridas por elementos punzocortantes. En clínica de grandes animales, la zoonosis más diagnosticada es la brucelosis; en la práctica con pequeñas especies, dermatofitosis y sarna. Entre las EP de origen ergonómico, se destacan las afecciones músculo esqueléticas (columna y articulaciones. La atención clínica no se percibe como de alto riesgo; aunque la mayor parte de los AL ocurre en dichas instancias. La frecuencia de uso de EPP varía en las distintas actividades profesionales y poblaciones relevadas. Los guantes son los más utilizados; mientras que la falta de uso de protectores oculares o faciales es muy evidente. No hay asociaciones entre percepción del riesgo y uso de EPP. En general, ambas son más frecuentes entre las mujeres y los jóvenes. La disposición final de insumos descartables, muchas veces, es inapropiada. La percepción de riesgos y la adopción de buenas prácticas, in itinere, es mayor en rutas principales que en caminos rurales; sin embargo, los AL son más frecuentes en estos últimos. Los AL y las EP no deben ser asumidos como algo natural, de ocurrencia corriente, que no requiere acción alguna. Es necesario cambiar conductas y actitudes en el ejercicio de la profesión, mejorar las condiciones de trabajo, concientizar las nuevas generaciones de profesionales y cumplir con el deber social de ser

  11. PRESENCIA DE Wolbachia y Leishmania EN UNA POBLACION DE Lutzomyia evansi PRESENTE EN LA COSTA CARIBE DE COLOMBIA

    Directory of Open Access Journals (Sweden)

    Rafael J. Vivero-Gómez

    2016-07-01

    Full Text Available Lutzomyia evansi es importante en salud pública por su participación en la trasmisión de la leishmaniasis visceral y cutánea en la costa caribe de Colombia. Diversos estudios se han desarrollado sobre la poblaciones naturales de Lutzomyia evansi, sin embargo pocos estudios han explorado en profundidad la detección de microorganismos simbióticos (ej. Wolbachia y de manera simultánea la presencia de Leishmania sp.. El endosimbionte Wolbachia ha sido propuesto en la actualidad como control biológico de insectos vectores de diversas enfermedades tropicales. En el presente estudio el ADN de tres especies del género Lutzomyia colectadas en el municipio de Ovejas (Departamento de Sucre fue evaluado para detectar la infección natural por la bacteria Wolbachia y la presencia de parásitos del género Leishmania. El ADN total de 176 individuos adultos y 34 inmaduros (larvas y pupas de Lu. evansi, fue utilizado para evaluar la detección de Wolbachia mediante amplificación por PCR del gen WSP (Proteína Mayor de la Superficie de Wolbachia y la infección por Leishmania mediante amplificación por PCR de segmentos de los genes HPSN70 (Proteína de Choque Térmico. Se encontró un grupo de machos infectado de forma natural por Wolbachia y nueve grupos de hembras con infección natural por Leishmania, todos pertenecientes a Lutzomyia evansi. El análisis filogenético de la secuencia del gen WSP de Wolbachia indica la ubicación de la cepa detectada dentro del supergrupo B (haplogrupo wLeva y su relación con haplotipos previamente reportados de Lutzomyia evansi y Lutzomya dubitans. Una región de 418 pb del gen HSP-70N fue secuenciada y mostró similaridad con secuencias de Leishmania luego de realizar el análisis en BlastN. Se confirma la presencia de Wolbachia en poblaciones silvestres de machos de L. evansi y la infección natural por Leishmania spp. en hembras de la misma especie cuya infección por Wolbachia resulto negativa.

  12. Medios de recuperación utilizados por entrenadores en los IV Juegos Intercolegiados Centroamericanos y del Caribe

    Directory of Open Access Journals (Sweden)

    Hilario Moreno Bolívar

    2016-09-01

    Full Text Available El presente estudio tuvo como objetivos identificar los medios de recuperación y ayudas ergonutricionales empleados por parte de los entrenadores participes en los IV Juegos Intercolegiados Centroamericanos y del Caribe, así como la causa o razón por la que son utilizados. Métodos. A través de una encuesta validada, se desarrolló un estudio descriptivo y corte transversal donde fueron encuestados 41 entrenadores (36 de sexo masculino y 6 de femenino de 13 modalidades deportivas y de 8 países entre los días 10 y 15 de noviembre de 2013, en la ciudad de Armenia, Colombia. Resultados. El 87 % de los entrenadores encuestados utiliza algún medio de recuperación con sus deportistas después de un entrenamiento o competición deportiva, siendo el estiramiento (91 % y el masaje (66,6 % los más utilizados; estableciendo que el principal motivo de uso de estos recursos es la facilidad de aplicación de dichas técnicas. Respecto a las ayudas ergonutricionales, el 68% de los entrenadores hace uso habitual de ellas, suministrando las vitaminas (46,4 % y las bebidas hidratantes (32,1 % en primera y segunda instancia; por su parte se determinó que la principal causa de utilización de estos suplementos alimentarios es el criterio personal del entrenador/a. Conclusiones. La mayoría de entrenadores utilizan los medios de recuperación para facilitar la recuperación física de sus deportistas, pero sus dos recursos más utilizados cuentan con poco respaldo científico. Pese a que un mayor porcentaje de entrenadores emplea ayudas ergonutricionales con los deportistas para restablecer sus fuentes energéticas y restauración de tejidos, estos requieren de un mayor acompañamiento y asesoría por parte de profesionales expertos en nutrición.

  13. Hombres creole y cáncer de próstata en Bluefields, Costa Caribe Sur de Nicaragua

    Directory of Open Access Journals (Sweden)

    Eva Hodgson Suárez

    2017-08-01

    Full Text Available Este estudio analizó los conocimientos, actitudes y prácticas que poseen hombres creoles del barrio Beholdeen en relación al cáncer de próstata, haciendo uso de las técnicas cuantitativas y cualitativas durante 2014-2015. Se aplicó una encuesta dirigida a una muestra de 251 hombres, los datos obtenidos fueron analizados utilizando el SPSS versión 20. Para la muestra cualitativa se realizaron 10 entrevistas, los resultados fueron tratados a través de análisis de contenido y del discurso. Los hallazgos revelan que el nivel de conocimientos que poseen los hombres creoles sobre el cáncer de próstata en Bluefields, Región Autónoma de la Costa Caribe Sur (RACCS es bajo. El 81 por ciento de los participantes afirmó que han escuchado acerca de esta enfermedad, siendo sus amistades la principal fuente de información. Consideran que tener más de una pareja sexual es la causa del cáncer de próstata, entre los síntomas que conocen denotan la visión borrosa, dolor de cabeza, disfunción eréctil y dolor de cadera. Las actitudes que presentan los hombres creoles frente al cáncer de próstata son negativas. Aunque están de acuerdo que es sumamente importante poseer los conocimientos adecuados sobre esta enfermedad, se disponen a recibir atención médica sólo en caso de presentar algún síntoma relacionado. Por otro lado, señalan que es importante realizarse periódicamente alguna prueba para la detección del cáncer (preferiblemente el ultrasonido; sin embargo, al momento de preguntar si está dispuesto a realizarse el Examen Digito Rectal, refieren una actitud negativa, ya que emergen ideas desagradables al respecto, causando sentimientos de temor y vergüenza, fundamentados principalmente por el machismo. Las acciones preventivas que practican estos hombres son casi nulas.  

  14. “Yo soy del Son a la Salsa”: La re-edición de nuevas expresiones interculturales caribeñas en el espacio cinematográfico

    Directory of Open Access Journals (Sweden)

    Maydi Estrada Bayona

    2014-01-01

    Full Text Available “Yo soy del Son a la Salsa”: La re-edición de nuevasexpresiones interculturales caribeñas en el espacio cinematográfico,es un artículo reflexivo que forma parte dela investigación titulada: Claves Interculturales Caribeñasen la poética cinematográfica de Rigoberto López. El mismoconstituye un acercamiento al tratamiento del temade la diáspora cubana y caribeña en el contexto del Caribeafro-hispánico insular y en Nueva York. El estudio tomacomo antecedente el largometraje de ficción La Últimacena, (1976 de Tomás Gutiérrez Alea y como obra principalel documental: Yo soy del Son a la Salsa, (1996 deRigoberto López, para a través de los aportes de la narrativacinematográfica cubana valorar acerca del impactosociocultural del sujeto migrante en los espacios de acogiday de origen. Ambas obras son referentes en el análisisde estos fenómenos sociales en relación a: su evoluciónen el tiempo, unicidad y diversidad de manifestaciones.Asimismo visualiza la complejidad de las relaciones espacialesabordadas en sus narrativas y explica los nexosentre ellas como obras propiamente. Define la visión interculturale intertextual del documental Yo soy del Son ala Salsa dentro de la estética de la creolización de su creador.Se analiza el lenguaje de la música como expresiónsimbólica de una identidad multicultural caribeña visto, apartir de los géneros musicales del Son y la Salsa, de igualmodo al espacio cinematográfico como revitalizador detradiciones en el Caribe.

  15. Reproduction ecology of Pinus halepensis : a monoecious, wind-pollinated and partially serotinous Mediterranean pine tree

    NARCIS (Netherlands)

    Goubitz, Shirrinka

    2001-01-01

    Fire is an important factor in the evolution and ecology of Mediterranean plant species. The fire frequency has increased in the 20st century. Pines are the most important tree species in the area. Pinus halepensis is the only natural pine in parts of the east Mediterranean basin, such as Israel and

  16. [Study of some characteristics of morphogenesis and germination of Pinus pallasiana D. Don. pollen].

    Science.gov (United States)

    Koba, V P

    2004-01-01

    Investigation of Pinus pallasiana D. Don. pollen morphogenesis in natural forest plantations of the southern slope of the Main ridge of Crimean mountains has been carried out. Some abnormalities of pollen grain and pollen tube formation in the course of pollen germination in vitro are described. The dynamics of developmental abnormalities of P. allasiana male gametophyte is characterized.

  17. The wood quality of Pinus chiapensis (Mart.) Andresen grown in the ...

    African Journals Online (AJOL)

    The wood quality of Pinus chiapensis (Mart.) Andresen grown in the Mpumalanga forest region: scientific paper. ... When present, the amounts of included resin, pieces of bark and other debris at the occluded pruning cuts, were small and of little practical significance. The wood machined without any difficulty in the wet and ...

  18. Growth and physiological responses to varied environments among populations of Pinus ponderosa

    Science.gov (United States)

    Jianwei Zhang; Bert M. Cregg

    2005-01-01

    We investigated population responses in physiology, morphology, and growth of mature Pinus ponderosa trees to an environmental gradient across Nebraska, USA. Ten populations from western Nebraska and eastern Wyoming were grown in three 26-year-old provenance tests from the warmest and wettest site in the east (Plattsmouth) to the intermediate site in...

  19. Effects of temperature on Pinus patula seedlings growing in pots in a ...

    African Journals Online (AJOL)

    The re-establishment of Pinus patula seedlings into sites with high harvesting residue (slash) loads can negatively affect the survival of these plants. Field trials have examined the role that insect pests and fungal diseases play in causing this phenomenon. Research has also indicated that temperatures at ground level tend ...

  20. Results from four Pinus patula water planting trials in the summer ...

    African Journals Online (AJOL)

    Planting with water is used by some forestry companies in South Africa to reduce post-planting water stress. Four trials were implemented to test the response in survival of Pinus patula to water applied at planting. Two trials each were situated in the KwaZulu-Natal Midlands and Mpumalanga escarpment. The first trial at ...

  1. Vector Analysis Identify Loblolly Pine (Pinus taeda L.) Phosphorus Deficiency on a Beauregard Soil

    Science.gov (United States)

    A. Bekele; W.H. Hundall; A.E. Tiarks

    1999-01-01

    We studied the response of densely stocked one-year-old loblolly pine (Pinus taeda L.) to N and P fertilizers on a Beauregard silt loam (fine silty, siliceous, thermic, Plinthaquic Paleudults). A continuous function" experimental design with three replications was used. Each replication consisted of 12 m X 12 m plots, with three trees planted...

  2. DNA analysis for section identification of individual Pinus pollen grains from Belukha glacier, Altai Mountains, Russia

    Science.gov (United States)

    Nakazawa, Fumio; Uetake, Jun; Suyama, Yoshihisa; Kaneko, Ryo; Takeuchi, Nozomu; Fujita, Koji; Motoyama, Hideaki; Imura, Satoshi; Kanda, Hiroshi

    2013-03-01

    Pollen taxon in sediment samples can be identified by analyzing pollen morphology. Identification of related species based on pollen morphology is difficult and is limited primarily to genus or family. Because pollen grains of various ages are preserved at below 0 °C in glaciers and thus are more likely to remain intact or to suffer little DNA fragmentation, genetic information from such pollen grains should enable identification of plant taxa below the genus level. However, no published studies have attempted detailed identification using DNA sequences obtained from pollen found in glaciers. As a preliminary step, this study attempted to analyze the DNA of Pinus pollen grains extracted from surface snow collected from the Belukha glacier in the Altai Mountains of Russia in the summer of 2003. A 150-bp rpoB fragment from the chloroplast genome in each Pinus pollen grain was amplified by polymerase chain reaction, and DNA products were sequenced to identify them at the section level. A total of 105 pollen grains were used for the test, and sequences were obtained from eight grains. From the sequences obtained, the pollen grains were identified as belonging to the section Quinquefoliae. Trees of the extant species Pinus sibirica in the section Quinquefoliae are currently found surrounding the glacier. The consistency of results for this section suggests that the pollen in the glacier originated from the same Pinus trees as those found in the immediate surroundings.

  3. Strength reduction in slash pine (Pinus elliotii) wood caused by decay fungi

    Science.gov (United States)

    Zhong Yang; Zhehui Jiang; Chung Y. Hse; Todd F. Shupe

    2009-01-01

    Small wood specimens selected from slash pine (Pinus elliotii )trees at three growth rates (fast, medium, and slow) were inoculated with brown-rot and white-rot fungi and then evaluated for work to maximum load (WML), modulus of rupture (MOR), and modulus of elasticity (MOE). The experimental variables studied included a brown-rot fungus (Gloeophyllum trabeum...

  4. Modeling contemporary climate profiles of whitebark pine (Pinus albicaulis) and predicting responses to global warming

    Science.gov (United States)

    Marcus V. Warwell; Gerald E. Rehfeldt; Nicholas L. Crookston

    2006-01-01

    The Random Forests multiple regression tree was used to develop an empirically-based bioclimate model for the distribution of Pinus albicaulis (whitebark pine) in western North America, latitudes 31° to 51° N and longitudes 102° to 125° W. Independent variables included 35 simple expressions of temperature and precipitation and their interactions....

  5. Procyanidins from Pinus koraiensis bark inhibits HeLa cell growth by ...

    African Journals Online (AJOL)

    Recently, the development of herbal medicine is an important advancement in anticancer therapy. Pinus koraiensis ... PKBPE could make the agarose gel electrophoresis of HeLa cells appear with “ladder” zone in a dose-dependent manner, increase the expression of Bax, reduce Bcl-2 and survivin protein expressions.

  6. First discovery of fossil winged seeds of Pinus L.(family Pinaceae ...

    Indian Academy of Sciences (India)

    winged seeds; middle-to-late Miocene; Siwaliks; palaeobiogeography; Arunachal Pradesh; biogeosciences; climate; geology. Abstract. The occurrences of Pinus L. (family Pinaceae) megafossils (cones and leaf remains) have been abundantly documented from the Cenozoic sediments of eastern Asia (Japan and China), ...

  7. Assessing longleaf pine (Pinus palustris) restoration after southern pine beetle kill using a compact experimental design

    Science.gov (United States)

    J.-P. Berrill; C.M. Dagley

    2010-01-01

    A compact experimental design and analysis is presented of longleaf pine (Pinus palustris) survival and growth in a restoration project in the Piedmont region of Georgia, USA. Longleaf pine seedlings were planted after salvage logging and broadcast burning in areas of catastrophic southern pine beetle (Dendroctonus frontalis) attacks on even-aged mixed pine-hardwood...

  8. First discovery of fossil winged seeds of Pinus L. (family Pinaceae ...

    Indian Academy of Sciences (India)

    18

    America, Mexico, North Africa, West Indies, Eurasia and the Pacific Islands in Sumatra (Kral. 6. 1993; Price et al. 1998). In India, Pinus is widely distributed in the hills and is an important. 7 source of resin and timber. Seven species are commonly found to occur in the North-West and. 8. North-East Himalayas from 150-3,000 ...

  9. Detection of possible Phytophthora pinifolia infection in pinus radiata green sawn timber produced in Chile

    Science.gov (United States)

    R. Ahumada; C. Díaz; M. Peredo; C. Barría; P. González; G. Cuevas

    2010-01-01

    A new needle blight disease was observed on Pinus radiata in Chile during 2004. The disease, known in Chile as Daño Foliar del Pino (DFP), stretches southward from the Arauco to Valdivia Provinces, and was present over an area of about 60 000 ha in 2006, with different levels of intensity. The disease is typified by needle infections and...

  10. Comparative genetic responses to climate in the varieties of Pinus ponderosa and Pseudotsuga menziesii: reforestation

    Science.gov (United States)

    Gerald E. Rehfeldt; Barry C. Jaquish; Cuauhtemoc Saenz-Romero; Dennis G. Joyce; Laura P. Leites; J. Bradley St Clair; Javier Lopez-Upton

    2014-01-01

    Impacts of climate change on the climatic niche of the sub-specific varieties of Pinus ponderosa and Pseudotsuga menziesii and on the adaptedness of their populations are considered from the viewpoint of reforestation. In using climate projections from an ensemble of 17 general circulation models targeting the decade surrounding 2060, our analyses suggest that a...

  11. The future of subalpine forests in the Southern Rocky Mountains: Trajectories for Pinus aristata genetic lineages

    Science.gov (United States)

    Sparkle L. Malone; Anna W. Schoettle; Jonathan D. Coop

    2018-01-01

    Like many other high elevation alpine tree species, Rocky Mountain bristlecone pine (Pinus aristata Engelm.) may be particularly vulnerable to climate change. To evaluate its potential vulnerability to shifts in climate, we defined the suitable climate space for each of four genetic lineages of bristlecone pine and for other subalpine tree species in close proximity to...

  12. The effect of mid-rotation fertilization on the wood properties of loblolly pine (Pinus taeda)

    Science.gov (United States)

    Finto Antony; Lewis Jordan; Laurence R. Schimleck; Richard F. Daniels; Alexander Clark III

    2009-01-01

    Mid-rotation fertilization is a common practice in the management of loblolly pine (Pinus taeda L.) plantations, typically providing large improvements in growth. However, concerns exist about the quality of wood produced following fertilization. The objective of this study was to develop an understanding of wood property changes following fertilization. Wood...

  13. Using flotation in ethanol to separate filled and empty seeds of Pinus ...

    African Journals Online (AJOL)

    In this study, the separation of filled and empty seeds of Crimean pine [Pinus nigra Arn. ssp. pallasiana (Lamb.) Holmboe] by flotation in ethanol and the effect of this treatment on seed germination were investigated. Flotation tests in 96% ethanol by the density method and then germination tests were made on the seeds ...

  14. Mechanical resistance by an ectorganic soil layer on roo development of seedling Pinus sylvestris.

    NARCIS (Netherlands)

    Ouden, den J.; Vogels, D.

    1997-01-01

    We investigated early root development of Pinus sylvestris seedlings in relation to bulk density and natural particle layering in an ectorganic soil layer from a bracken (Pteridium aquilinum) stand. Responses in root development to two levels of bulk density (0.07 and 0.15 g/cm3) in mixed bracken

  15. Multi-Season Monoterpene and Sesquiterpene Analysis of Pinus taeda Needle Tissue

    Science.gov (United States)

    Pinus taeda (Loblolly pine) is one of the worlds most important timber crop and accounts for a significant portion of the southeastern U.S. landcover. Biogenic voltile organic compound (BVOC) content was extracted from the tissue material of P. taeda needles and analyzed over a m...

  16. Reference karyotype and cytomolecular map for loblolly pine (Pinus taeda L.).

    Science.gov (United States)

    Islam-Faridi, M Nurul; Nelson, C Dana; Kubisiak, Thomas L

    2007-02-01

    A reference karyotype is presented for loblolly pine (Pinus taeda L., subgenus Pinus, section Pinus, subsection Australes), based on fluorescent in situ hybridization (FISH), using 18S-28S rDNA, 5S rDNA, and an Arabidopsis-type telomere repeat sequence (A-type TRS). Well separated somatic chromosomes were prepared from colchicine-treated root meristems, using an enzymatic digestion technique. Statistical analyses performed on chromosome-arm lengths, centromeric indices, and interstitial rDNA and telomeric positions were based on observations from 6 well-separated metaphase cells from each of 3 unrelated trees. Statistically, 7 of the 12 loblolly pine chromosomes could be distinguished by their relative lengths. Centromeric indices were unable to distinguish additional chromosomes. However, the position and relative strength of the rDNA and telomeric sites made it possible to uniquely identify all of the chromosomes, providing a reference karyotype for use in comparative genome analyses. A dichotomous key was developed to aid in the identification of loblolly pine chromosomes and their comparison to chromosomes of other Pinus spp. A cytomolecular map was developed using the interstitial 18S-28S rDNA and A-type TRS signals. A total of 54 bins were assigned, ranging from 3 to 5 bins per chromosome. This is the first report of a chromosome-anchored physical map for a conifer that includes a dichotomous key for accurate and consistent identification of the P. taeda chromosomes.

  17. Presettlement Pinus taeda in the Mississippi Valley Alluvial Plain of the Monroe County, Arkansas area

    Science.gov (United States)

    Don C. Bragg

    2005-01-01

    Loblolly pine (Pinus taeda) is the most dominant conifer in the southeastern United States (Baker and Langdon, 1990). However, loblolly pine was conspicuously absent from virtually the entire Mississippi Valley Alluvial Plain during presettlement times. A map (Fig. 1) of the native distribution of loblolly from Baker and Langdon (1990) identifies 2 exceptions to this...

  18. Influences of community composition on biogeochemistry of loblolly pine (Pinus taeda) systems

    Science.gov (United States)

    B.G. Lockaby; J.H. Miller; R.G. Clawson

    1995-01-01

    Litterfall and decomposition processes were compared among four forest plantations that were dominated by loblolly pine (Pinus taeda L) but that differed.in terms of presence or absence of deciduous and herbaceous components. Based on aboveground litterfall, the pine-only community was the most productive but had the slowest turnover of organic...

  19. JUVENILE-MATURE GENETIC CORRELATIONS IN Pinus taeda CLONES PROPAGATED VIA SOMATIC EMBRYOGENESIS

    Directory of Open Access Journals (Sweden)

    Poliana Coqueiro Dias

    2016-04-01

    Full Text Available ABSTRACT This study aimed to estimate the genetic correlation among selection ages (juvenile - adult and efficiency of early selection for the height, diameter, and volume traits of individuals from Pinus taeda families propagated via somatic embryogenesis. This study was carried out by genetic-statistical analysis, estimation procedure of variance (Reml, and prediction components of breeding values (Blup, using the Selegen-Reml/Blup software. Genetic correlations among juvenile ages and rotation age were performed by applying the linear model developed by Lambeth (1980. In accordance with results of the established model, the early selection can be performed in clones of Pinus taeda with high selection efficiency. Ages from 4 to 6 years old are enough to select Pinus taeda clones propagated via somatic embryogenesis for harvesting at 8 and 12 years old; and 6 to 10 years old are enough to select them for harvesting at 20 years old. On the basis of the genetic correlations estimates from the environments, the clones' selection of Pinus taeda propagated via somatic embryogenesis should be developed specifically for each environment. The clones' selection can be performed considering the diameter due to the high correlation between volume and diameter.

  20. LEAF AREA INDEX (LAI) CHANGE DETECTION ANALYSIS ON LOBLOLLY PINE (PINUS TAEDA) FOLLOWING COMPLETE UNDERSTORY REMOVAL

    Science.gov (United States)

    The confounding effect of understory vegetation contributions to satellite-derived estimates of leaf area index (LAI) was investigated on two loblolly pine (Pinus taeda) forest stands located in Virginia and North Carolina. In order to separate NDVI contributions of the dominantc...

  1. ECTOMYCORRHIZAL DIVERSITY IN A LOBLOLLY PINE (PINUS TAEDA L.) GENETICS PLANTATION: INFLUENCE OF FERTILIZATION

    Science.gov (United States)

    Loblolly pine (Pinus taeda L.) Has co-evolved a high dependency on ectomycorrhizal (ECM) associations most likely because its natural range includes soils of varying moisture that are P- and/or N-deficient. Because of its wide geographic distrubition, we would expect its roots t...

  2. Loblolly pine: the ecology and culture of loblolly pine (Pinus taeda L.)

    Science.gov (United States)

    Robert P. Schultz

    1997-01-01

    Loblolly pine ranks as a highly valuable tree for its pulp, paper, and lumber products. In the South, loblolly is planted more than any other conifer. Loblolly Pine: The Ecology and Culture of Loblolly Pine (Pinus taeda L.) adds to the technical foundations laid by Ashe (1915) and Wahlenberg (1960). Agriculture Handbook 713 encompasses genetics, tree...

  3. Cogongrass ( Imperata cylindrica ) affects above- and belowground processes in commercial loblolly pine ( Pinus taeda ) stands

    Science.gov (United States)

    Adam N. Trautwig; Lori G. Eckhardt; Nancy J. Loewenstein; Jason D. Hoeksema; Emily A. Carter; Ryan L. Nadel

    2017-01-01

    Cogongrass (Imperata cylindrica), an invasive grass species native to Asia, has been shown to reduce tree vigor in loblolly pine (Pinus taeda) plantations, which comprise more than 50% of growing stock in commercial forests of the United States. I. cylindrica produces exudates with possible allelopathic effects that may influence abundance of P. taeda symbionts, such...

  4. Mosaic stunting in bareroot Pinus banksiana seedlings is unrelated to colonization by mycorrhizal fungi

    Science.gov (United States)

    Lynette R. Potvin; Martin F. Jurgensen; R. Kasten Dumroese; Dana L. Richter; Deborah S. Page-Dumroese

    2014-01-01

    Mosaic stunting, the occurrence of random patches of chlorotic seedlings with reduced shoot and diameter growth amidst more robust cohorts within bareroot nurseries, is classically associated with poor colonization by mycorrhizal fungi. We examined possible relationships among soil fertility, mycorrhizas, and random patches of mosaic stunting in bareroot Pinus...

  5. Fusarium spp. and Pinus strobus seedlings: root disease pathogens and taxa associated with seed

    Science.gov (United States)

    C. M. Ocamb; J. Juzwik; F. B. Martin

    2002-01-01

    Eastern white pine (Pinus strobus L .) seeds were sown in soil infested wlth Fusarium proliferatum, root necrosis developed on seedling roots, and F. proliferatum as reisolated from symptomatic roots; thus, demonstrating that F. proliferatum is pathogenic to eastern white pine seedling. Soils...

  6. Simulatd Nitrogen Cycling Response to Elevated CO2 in Pinus taeda and Mixed Dediduous Forests

    Science.gov (United States)

    D.W. Johnson

    1999-01-01

    Interactions between elevated CO2 and N cycling were explored with a nutrient cycling model (NuCM, Johnson et al. 1993, 1995) for a Pinus tuedu L. site at Duke University North Carolina, and a mixed deciduous site at Walker Branch, Tennessee. The simulations tested whether N limitation would prevent growth increases in response to elevated CO...

  7. Water availability and genetic effects on wood properties of loblolly pine (Pinus taeda)

    Science.gov (United States)

    C. A. Gonzalez-Benecke; T. A. Martin; Alexander Clark; G. F. Peter

    2010-01-01

    We studied the effect of water availability on basal area growth and wood properties of 11-year-old loblolly pine (Pinus taeda L.) trees from contrasting Florida (FL) (a mix of half-sib families) and South Carolina coastal plain (SC) (a single, half-sib family) genetic material. Increasing soil water availability via irrigation increased average wholecore specific...

  8. [Genetic control of the isoenzymes in Cembra pine (Pinus cembra L.) in the Ukrainian Carpathian Mountains].

    Science.gov (United States)

    Pirko, Ia V; Korshikov, I I

    2001-01-01

    Genetic control of GOT, GDH, DIA, MDH, SOD, FDH, ADH, ACP, and LAP enzymes was studied in the seed megagametophytes of cembra pine (Pinus cembra L.) from the natural population of the Ukrainian Carpa-thian mountains. Efficient electrophoretic separation was obtained for 21 loci products. The analysis of allele segregation in heterozygous trees confirms monogenic inheritance of the revealed variants.

  9. Soil enzyme activities in Pinus tabuliformis (Carriere) plantations in northern China

    Science.gov (United States)

    Weiwei Wang; Deborah Page-Dumroese; Ruiheng Lv; Chen Xiao; Guolei Li; Yong Liu

    2016-01-01

    Changes in forest stand structure may alter the activity of invertase, urease, catalase and phenol oxidase after thinning Pinus tabuliformis (Carriére) plantations in Yanqing County of Beijing, China. We examined changes in these soil enzymes as influenced by time since thinning (24, 32, and 40 years since thinning) for 3 seasons (spring, summer and autumn)...

  10. Forest floor depth mediates understory vigor in xeric Pinus palustris ecosystems

    Science.gov (United States)

    J. Kevin Hiers; Joseph J. O' Brien; Rodney E. Will; Robert J. Mitchell

    2007-01-01

    Longleaf pine (Pinus palustris) woodlands and savannas are among the most frequently burned ecosystems in the world with fire return intervals of 1–10 years. This fire regime has maintained high levels of biodiversity in terms of both species richness and endemism. Land use changes have reduced the area of this ecosystem by .95%, and inadequate fire...

  11. Polyamine levels during the development of zygotic and somatic embryos of Pinus radiata

    Science.gov (United States)

    Rakesh Minocha; Dale R. Smith; Cathie Reeves; Kevin D. Steele; Subhash C. Minocha

    1999-01-01

    Changes in the cellular content of three polyamines (putrescine, spermidine and spermine) were compared at different stages of development in zygotic and somatic embryos of Pinus radiata D. Don. During embryo development, both the zygotic and the somatic embryos showed a steady increase in spermidine content, with either a small decrease or no...

  12. Fungal endophytes in woody roots of Douglas-fir (Pseudotsuga menziesii) and ponderosa pine (Pinus ponderosa)

    Science.gov (United States)

    J. A. Hoff; Ned B. Klopfenstein; Geral I. McDonald; Jonalea R. Tonn; Mee-Sook Kim; Paul J. Zambino; Paul F. Hessburg; J. D. Rodgers; T. L. Peever; L. M. Carris

    2004-01-01

    The fungal community inhabiting large woody roots of healthy conifers has not been well documented. To provide more information about such communities, a survey was conducted using increment cores from the woody roots of symptomless Douglas-fir (Pseudotsuga menziesii) and ponderosa pine (Pinus ponderosa) growing in dry forests...

  13. Procyanidins from Pinus koraiensis bark inhibits HeLa cell growth by ...

    African Journals Online (AJOL)

    Jane

    that the mechanism of PKBPE inducing apoptosis might be associated with increasing the expression of Bax protein, reducing Bcl-2 and survivin protein expressions. Key words: Pinus koraiensis bark, procyanidins, HeLa cell, apoptosis. INTRODUCTION ..... dent apoptosis, mitosis regulation and apoptosis suppression, but ...

  14. Nuclear genetic variation across the range of ponderosa pine (Pinus ponderosa): Phylogeographic, taxonomic and conservation implications

    Science.gov (United States)

    Kevin M. Potter; Valerie D. Hipkins; Mary F. Mahalovich; Robert E. Means

    2015-01-01

    Ponderosa pine (Pinus ponderosa) is among the most broadly distributed conifer species of western North America, where it possesses considerable ecological, esthetic, and commercial value. It exhibits complicated patterns of morphological and genetic variation, suggesting that it may be in the process of differentiating into distinct regional...

  15. Influence of ammonia and ozone on growth and drought sensitivity of Pinus sylvestris

    NARCIS (Netherlands)

    Dueck, Th.A.; Zuin, A.; Elderson, J.

    1998-01-01

    Four-year-old Pinus sylvestris trees were exposed to ammonia (16, 55, 110 ppb for 24 h d-1)and ozone (0, 45 and 68 ppb, 9 h d-1) in a factorial design in open-top chambers for 15 months. Treatment effects on tree growth and architecture were assessed during two growing seasons; effects on

  16. Mortalidade em florestas de Pinus palustris causada por tempestade de raios

    Science.gov (United States)

    Kenneth W. Outcalt; Jorge Paladino Corrêa de Lima; Jose Américo de Mello Filho

    2002-01-01

    The importance of lightning as an ignition source for the fire driven Pinus palustris ecosystem is widely recognized. Lightning also impacts this system on a smaller scale by causing individual tree mortality. The objective of this study was to determine the level of mortality due to lightning activity at the Department of Energy's Savannah...

  17. The variation of microfibril angle in South African grown Pinus patula ...

    African Journals Online (AJOL)

    It has been shown for some species that the microfibril angle (MFA) of the S2 layer of tracheids is strongly related to the modulus of elasticity (MOE) of wood, even more so than wood density, especially in wood formed during juvenile growth. The objectives of this study were to describe the variation in MFA in young Pinus ...

  18. Effects of intermediate-severity disturbance on composition and structure in mixed Pinus-hardwood stands

    Science.gov (United States)

    Benjamin Trammell; Justin Hart; Callie Schweitzer; Daniel C. Dey; Michael Steinberg

    2017-01-01

    Increasingly, forest managers intend to create or maintain mixed Pinus-hardwood stands. This stand assemblage may be driven by a variety of objectives but is often motivated by the desire to enhance native forest diversity and promote resilience to perturbations. Documenting the effects of natural disturbances on species composition and stand...

  19. Effects of air pollution on morphological and anatomical characteristics of Pinus Eldarica Wood

    Science.gov (United States)

    Vahidreza Safdari; Moinuddin Ahmed; Margaret S. Devall; Vilma Bayramzadeh

    2012-01-01

    Air pollution, including automobile exhaust pollution, can affect anatomical and morphological characteristics of wood. In order to evaluate this subject, the Pinus eldarica trees of Chitgar Park in Tehran, which extends from a crowded highway in the south (polluted site) to the semi polluted midsection and to Alborz Mountain in the north (unpolluted...

  20. The genetics of shortleaf pine (Pinus echinata mill.) with implications for restoration and management

    Science.gov (United States)

    John F. Stewart; Rodney E. Will; Barbara S. Crane; C. Dana Nelson

    2016-01-01

    Shortleaf pine (Pinus echinata Mill.) is an important commercial timber resource and forest ecosystem component in the southeastern USA. The species occurs in mainly drier sites as an early- to mid-successional species, is fireadapted, and it plays an important role in the fire ecology of the region. However, shortleaf pine genetics are not well-studied, especially in...

  1. Pinus mugo and P. uncinata as Parents of Hybrids. A Taxonomic and Nomenclatural Survey

    Czech Academy of Sciences Publication Activity Database

    Businský, R.; Kirschner, Jan

    2010-01-01

    Roč. 50, č. 1 (2010), s. 27-57 ISSN 0079-2047 R&D Projects: GA MŠk LC06073 Institutional research plan: CEZ:AV0Z60050516 Keywords : Pinaceae * Pinus mugo * hybridization Subject RIV: EF - Botanics Impact factor: 0.462, year: 2010

  2. CO2 AND O3 ALTER PHOTOSYNTHESIS AND WATER VAPOR EXCHANGE FOR PINUS PONDEROSA NEEDLES

    Science.gov (United States)

    1. Effects of CO2 and O3 were determined for a key component of ecosystem carbon and water cycling: needle gas exchange (photosynthesis, conductance, transpiration and water use efficiency). The measurements were made on Pinus ponderosa seedlings grown in outdoor, sunlit, mesoc...

  3. Effect of plantation density on kraft pulp production from red pine (Pinus resinosa Ait.)

    Science.gov (United States)

    J.Y. Zhu; G.C. Myers

    2006-01-01

    Red pine (Pinus resinosa Ait.) butt logs from 38 year old research plots were used to study the effect of plantation stand density on kraft pulp production. Results indicate that plantation stand density can affect pulp yield, unrefined pulp mean fibre length, and the response of pulp fibre length to pulp refining. However, the effect of plantation stand density on...

  4. Effects of plantation density on wood density and anatomical properties of red pine (Pinus resinosa Ait.)

    Science.gov (United States)

    J. Y. Zhu; C. Tim Scott; Karen L. Scallon; Gary C. Myers

    2007-01-01

    This study demonstrated that average ring width (or average annual radial growth rate) is a reliable parameter to quantify the effects of tree plantation density (growth suppression) on wood density and tracheid anatomical properties. The average ring width successfully correlated wood density and tracheid anatomical properties of red pines (Pinus resinosa Ait.) from a...

  5. Stand-level Allometry in Pinus taeda as Affected by Irrigation and Fertilization

    Science.gov (United States)

    J.S. King; T.J. Albaugh; H.L. Allen; L.W. Kress

    1999-01-01

    Changing environmental conditions have the potential to alter allometric relationships between plant parts, possibly leading to ecosystem-level feedbacks. We quantified allometric shifts in field-grown loblolly pine (Pinus taeda L.) in response to altered resource availability based on data from multiple harvests to correct for size-related changes...

  6. Regeneration Methods Affect Genetic Variation and Structure in Shortleaf Pine (Pinus Echinata Mill.)

    Science.gov (United States)

    Rajiv G. Raja; Charles G. Tauer; Robert F. Wittwer; Yinghua Huang

    1998-01-01

    The effects of regene ration methods on genetic diversity and structure in shortleaf pine (Pinus echinata Mill.) were examined by quantifying the changes in genetic composition of shortleaf pine stands following harvest by monitoring changes in allele number and frequency at heterozygous loci over time. The results were also compared to the genetic...

  7. Nursery response of container Pinus palustris seedlings to nitrogen supply and subsequent effects on outplanting performance

    Science.gov (United States)

    D. Paul Jackson; R. Kasten Dumroese; James P. Barnett

    2012-01-01

    Container longleaf pine (Pinus palustris) seedlings often survive and grow better after outplanting than bareroot seedlings. Because of this, most longleaf pine are now produced in containers. Little is known about nursery fertilization effects on the quality of container longleaf pine seedlings and how that influences outplanting performance. We compared various...

  8. Alkanes and terpenes in wood and leaves of Pinus jeffreyi and P. sabiniana

    Science.gov (United States)

    Robert P. Adams; Jessica W. Wright

    2012-01-01

    The wood oils of Pinus jeffreyi and P. sabiniana contain considerable amounts of heptane (76.6%, 92%), on a monoterpene basis. However, when entire wood extractables is considered, the amounts drop considerably (3.4%, 36.8%) with the major portion of the wood oils being diterpene acids. The leaf oil of P. jeffreyi...

  9. Modeling future plant distributions on the Colorado Plateau: An example using Pinus edulis

    Science.gov (United States)

    Kenneth L. Cole; Kirsten E. Ironside; Samantha T. Arundel; Philip Duffy; John Shaw

    2008-01-01

    The recent mortality of some plant species in the U.S. Southwest has been attributed to the ongoing drought conditions over the last decade. This mortality has been especially acute in populations of Pinus edulis (Colorado pinyon pine; hereafter abbreviated as pinyon), a widespread and highly visible species (Shaw 2006; Shaw et al. 2005; Mueller et...

  10. The effects of ontogenetic maturation in Pinus patula – Part II: hedge ...

    African Journals Online (AJOL)

    Early studies suggest that the juvenile period, during which favourable rooting can be achieved from Pinus patula seedling hedges, may be as short as 2 years from the date of sowing. If the effects of hedge maturation cannot be delayed, productivity from seedling hedges will be severely limited. The most common ...

  11. Ectomycorrhizal fungi and Pinus sylvestris: aluminium toxicity, base cation deficiencies and exudation of organic anions.

    NARCIS (Netherlands)

    Schöll, van L.

    2006-01-01

    Keywords: aluminium (Al), base cations, BC:Alratio, magnesium (Mg), organic anions, oxalate, malonate, ectomycorrhizal fungi, Paxillus involutus, Pinus sylvestris (Scots pine)The finding of microscopic-small tunnels in mineral grains

  12. La cobertura de la atención de salud en América Latina y el Caribe

    Directory of Open Access Journals (Sweden)

    José María Paganini

    1998-11-01

    Full Text Available En los años setenta, los Estados Miembros de la Organización Mundial de la Salud asumieron la meta de salud para todos y la responsabilidad de mejorar la cobertura, la calidad y la eficiencia de los servicios de salud que ofrecen. A pesar de ese compromiso, se ha avanzado poco en la profundización conceptual y el desarrollo de indicadores que permitan evaluar las características de las poblaciones con y sin cobertura, así como en conocer la relación entre la cobertura y las características de los servicios de salud. La mayoría de los países de América Latina y el Caribe están llevando a cabo reformas del sector de la salud y podrían beneficiarse de una nueva forma de enfocar esas áreas. Para contribuir a ese conocimiento, en este estudio se estimó la población sin cobertura de servicios de salud en los países de América Latina y el Caribe, utilizando cuatro indicadores de cobertura: la vacunación antipoliomielítica, la vacunación antituberculosa (BCG, el control prenatal de la mujer embarazada y la proporción de partos atendidos por profesionales de la salud. De una población total de 474 millones de habitantes, la población sin cobertura en 1995 se estimó en un mínimo de 40 millones según el indicador de cobertura con vacuna BCG y un máximo de 137 millones, según el del control prenatal. El análisis de los cuatro indicadores en cada país también permite identificar diferentes perfiles de desarrollo de los servicios de salud, que podrían sugerir distintos tipos de política en los procesos de reforma del sector. Finalmente se efectúa un análisis de correlación simple entre indicadores en 46 países y territorios, utilizando cinco indicadores de recursos, 10 de cobertura real y siete de resultados. Se observó una asociación estadísticamente significativa (P = 0,05 entre la cobertura alcanzada en el control prenatal y del parto, y los indicadores de resultados medidos por las tasas de mortalidad infantil y de

  13. The seed bank in Pinus stand regeneration in NW Spain after wildfire

    Directory of Open Access Journals (Sweden)

    L. Calvo

    2001-05-01

    Full Text Available In the Cantabrian area (northwest Spain Pinus stands occupy many of the original shrub communities that have been considered unproductive. These Pinus stands represent the vegetation which is most affected by fire. Regeneration after fire may occur in different ways: by resprouting or by germination or both. Germination was the only regeneration mechanism in Pinus species that appeared in these areas. The aim of this study is to determine the role of the soil seed bank in regeneration in this type of ecosystem. In order to carry out the study, three communities dominated by Pinus sylvestris which had suffered wildfires were chosen. In each of the three experimental sites of Pinus sylvestris stands the seed bank composition and above-ground vegetation were studied. The results allowed three species groups in the seed bank to be differentiated: those favoured by fire, amongst which some hardseeds, mainly belonging to Cistaceae and Leguminosae, were found; another group formed by outsider or opportunist species from outside the community and which used anemochory as their main dispersion mechanism; and the third group formed by those negatively affected, amongst which were species using vegetative resprout as the main regeneration mechanism. The species of greatest quantitative importance in the seed bank was Erica australis. In general, anemochorous species were predominant in the soil seed bank. During the first stages of succession chamaephytes were dominant and in the two years after fire therophytes were. No great similarity was observed between the bank composition and field vegetation from a qualitative viewpoint, due to differences in the presence of seeds of outsider plants in the bank and to the significance of the resprouting species in the field.

  14. Fossils matter: improved estimates of divergence times in Pinus reveal older diversification.

    Science.gov (United States)

    Saladin, Bianca; Leslie, Andrew B; Wüest, Rafael O; Litsios, Glenn; Conti, Elena; Salamin, Nicolas; Zimmermann, Niklaus E

    2017-04-04

    The taxonomy of pines (genus Pinus) is widely accepted and a robust gene tree based on entire plastome sequences exists. However, there is a large discrepancy in estimated divergence times of major pine clades among existing studies, mainly due to differences in fossil placement and dating methods used. We currently lack a dated molecular phylogeny that makes use of the rich pine fossil record, and this study is the first to estimate the divergence dates of pines based on a large number of fossils (21) evenly distributed across all major clades, in combination with applying both node and tip dating methods. We present a range of molecular phylogenetic trees of Pinus generated within a Bayesian framework. We find the origin of crown Pinus is likely up to 30 Myr older (Early Cretaceous) than inferred in most previous studies (Late Cretaceous) and propose generally older divergence times for major clades within Pinus than previously thought. Our age estimates vary significantly between the different dating approaches, but the results generally agree on older divergence times. We present a revised list of 21 fossils that are suitable to use in dating or comparative analyses of pines. Reliable estimates of divergence times in pines are essential if we are to link diversification processes and functional adaptation of this genus to geological events or to changing climates. In addition to older divergence times in Pinus, our results also indicate that node age estimates in pines depend on dating approaches and the specific fossil sets used, reflecting inherent differences in various dating approaches. The sets of dated phylogenetic trees of pines presented here provide a way to account for uncertainties in age estimations when applying comparative phylogenetic methods.

  15. Biomass burning plumes and the aging of black carbon aerosols in the tropopause region observed with the CARIBIC single particle soot photometer

    Science.gov (United States)

    Ditas, J.; Ma, N.; Zhang, Y.; Assmann, D. N.; Neumaier, M.; Wang, S.; Wang, J.; Zahn, A.; Hermann, M.; Brenninkmeijer, C. A. M.; Poeschl, U.; Su, H.; Cheng, Y.

    2017-12-01

    Biomass burning (BB) events can release large amounts of refractory black carbon (rBC) into the upper troposphere and lowermost stratosphere (UT/LMS) (Dahlkötter et al., 2014). To explore this effect, a Single Particle Soot Photometer (SP2) was added to the scientific payload of the instrumented CARIBIC container that is installed monthly in the cargo bay of a passenger aircraft (the IAGOS-CARIBIC atmospheric observatory, www.iagos.org). Regular measurement flights with different destinations are performed, covering an area of about 120°W to 120°E and 75°N to 30°S. A wide range of in situ measurements (CO, O3, greenhouse gases, aerosol particles and volatile organic compounds) is combined with a collection of air and aerosol samples for laboratory analyses. Since August 2014, the SP2 measures BC number and mass concentration at altitudes between 8 and 12 km. More than 600 BC measurement hours show a strong impact of BB emissions on the lowermost stratosphere. The BB plumes are identified with the help of concurrent carbon monoxide and acetonitrile measurements showing substantially increased concentrations compared to their background level. Transported into the lowermost stratosphere, BB smoke can be transported over long distances and the BC particles can stay in the atmosphere up to one year. The monthly missions of four consecutive CARIBIC flights sometimes enable to revisit a certain air mass, as was the case during a measurement flight to San Francisco in August 2014, with a stopover time of 2h. The revisited biomass burning plume located over the Altlantic ocean near Greenland was traced back by backward and forward trajectories to open fires in Canada (upper Fig.). The transit time of the smoke plume was estimated to 16 - 19h which perfectly matches our flight time difference ( 18h). Based on the LEO-fit method (Leading Edge Only fit) from Gao et al. (2007), the mixing state of the BC particles within the BB plume was calculated. Our unique data set

  16. TIC, asociatividad y turismo, tres factores unidos para potenciar el Caribe colombiano ICT, partnership and tourism, three factors united to promote the colombian Caribbean

    Directory of Open Access Journals (Sweden)

    Adriana P. Uribe Uran

    2010-06-01

    Full Text Available El presente artículo expone la experiencia obtenida por un grupo de investigadores de la Universidad Simón Bolívar de Barranquilla- Colombia, tras la ejecución de un proyecto que consistió en la construcción de un sistema de gestión y el desarrollo de un conjunto de estrategias para potenciar las ventajas del Caribe Colombiano como sector turístico. La finalidad del proyecto era mejorar el desarrollo económico y social de esta región y hacerla atractiva para turistas nacionales y extranjeros, de tal forma que a través del portal Web creado como estrategia central, la visitaran para disfrutar de los diferentes tipos de turismo que esta región puede ofrecer: ecológico, de aventura, de salud, cultural, de sol y playa, entre otros. La investigación arrojo dentro de sus resultados, la conformación de un grupo de empresarios del sector turístico, en un trabajo asociativo bajo el apoyo de una plataforma en TIC que permite a los potenciales viajeros, conocer las ventajas del Caribe como destino turístico, y a los empresarios, promocionar sus servicios a través del portal.This article presents the experience gained by a research group from the Simon Bolivar University of Barranquilla-Colombia, after carrying out a project which consisted in the building of a communication system and the development of a group of strategies that will impulse the advantages of the Colombian Caribe as a touristic place, with the goal of improving the economic and social development of this Colombian region and making it an attractive place for national and foreign tourists, who, through the web page created as central strategy, could visit and enjoy the different tourism types it can offer: ecologic, adventure, health, cultural, beach and sun, among others. The research results showed the formation of a group of businessmen in the tourism sector, working in partnership under the support of a ICT’s platform that enables them to promote their services

  17. DISEÑO DE UN SISTEMA DE GESTIÓN DE LA CALIDAD EN EL PROCESO DE ALOJAMIENTO EN EL HOTEL “GRAN CARIBE VILLA TORTUGA” / DESIGN OF A QUALITY MANAGEMENT SYSTEM IN THE PROCESS OF ACCOMMODATION IN "GRAN CARIBE VILLA TORTUGA” HOTEL

    Directory of Open Access Journals (Sweden)

    Marilet Cazañas-Rivero

    2011-03-01

    Full Text Available

    Teniendo en cuenta el desarrollo de la industria turística y la necesidad de la excelencia competitiva, se concibe este trabajo en el Hotel “Gran Caribe Villa Tortuga” con el objetivo central de diseñar un Sistema de Gestión de la Calidad que permita la mejora del proceso de Alojamiento en este Hotel. Después de un diagnóstico inicial se demostró la necesidad de realizar cambios significativos en la instalación, donde existen dificultades en cuanto a la gestión de la calidad adecuada a las características del Hotel, en el cual no se toman acciones que permitan resolver dichas deficiencias. Se elaboró un procedimiento para el diseño del Sistema de gestión de la Calidad en el Hotel “Gran Caribe Villa Tortuga”. El diseño del Sistema de Gestión de la Calidad en el área de Alojamiento brinda a la dirección del Hotel el estado actual de la calidad de los servicios en esta área, mediante la aplicación de las técnicas utilizadas y ofrece las estrategias a seguir para lograr un mejor servicio.

    Abstract

    Taking into account the development of the tourist industry and the necessity of the competitive excellence it is conceived this work in the “Gran Caribe Villa Tortuga” Hotel, focusing in the design of a Quality Management System that allows the improvement of the process of Accommodation in this Hotel. After an initial diagnosis, it was demonstrated the necessity of carrying out significant changes in the facilities. There are some difficulties regarding quality management suited to the characteristics of the Hotel in which actions that allow solving these deficiencies are not carried out. It was elaborated a procedure for the design of the Quality Management System in the “Gran Caribe Villa Tortuga” Hotel. The design of the Quality Management System in the Accommodation area provides the Hotel management with the current state of service quality in this area by means of the

  18. Analysis of 13C and 18O isotope data of CO2 in CARIBIC aircraft samples as tracers of upper troposphere/lower stratosphere mixing and the global carbon cycle

    Directory of Open Access Journals (Sweden)

    C. A. M. Brenninkmeijer

    2010-09-01

    Full Text Available The project CARIBIC (http://caribic-atmospheric.com aims to study atmospheric chemistry and transport by regularly measuring many compounds in the free troposphere and the upper troposphere/lowermost stratosphere (UT/LMS by using passenger aircraft. Here we present CO2 concentrations and isotope results, and analyze the data together with supporting trace gas data. 509 CARIBIC-2 samples (highest precision and accuracy δ13C(CO2 and δ18O(CO2 data from June 2007 until March 2009, together with CARIBIC-1 samples (flights between November 1999 and April 2002, 350 samples in total, 270 for NH, mostly δ13C(CO2 data give a fairly extensive, unique data set for the NH free troposphere and the UT/LMS region. Total uncertainty of the data is the same as reported for the global monitoring program by NOAA-ESRL. To compare data from different years a de-trending is applied. In the UT/LMS region δ13C(CO2, δ18O(CO2 and CO2 are found to correlate well with stratospheric tracers, in particular N2O; δ18O(CO2 appears to be a useful, hitherto unused, tracer of atmospheric transport in the UT/LMS region and also inter-hemispheric mixing. By filtering out the LMS data (based on N2O distributions, the isotope variations for the free and upper troposphere are obtained. These variations have only small latitudinal gradients, if any, and are in good agreement with the data of selected NOAA stations in NH tropics. Correlations between δ13C(CO2 and CO2 are observed both within single flight(s covering long distances and during certain seasons. The overall variability in de-trended δ13C(CO2 and CO2 for CARIBIC-1 and CARIBIC-2 are similar and are generally in agreement, which underscores agreement between high and low resolution sampling. Based on all correlations, we infer that the CO2 distribution in the NH troposphere along CARIBIC flight routes is chiefly regulated by uplift and pole-wards transport of tropical air up to approximately 50° N. The main reason for

  19. Comparative recruitment success of pine provenances (Pinus sylvestris, Pinus nigra) under simulated climate change in the Swiss Rhone valley

    Science.gov (United States)

    Richter, Sarah; Moser, Barbara; Ghazoul, Jaboury; Wohlgemuth, Thomas

    2010-05-01

    Low elevation Scots pine forests of European inner-alpine dry valleys may potentially disappear under continued climate warming, largely in response to increased warming and drought effects. In the upper Rhone valley, the driest region in Switzerland, increased Scots pine mortality in mature forest stands and sparse tree establishment after a large-scale forest fire already give evidence for ongoing climate change. Furthermore, vegetation models predict a decline of Scots pine (Pinus sylvestris) and Pubescent oak (Quercus pubescens) even under a moderate temperature increase of 2-3°C. A decline of tree species in the region may lead to a transition from forest to a steppe-like vegetation. Such a change is of considerable concern for both biodiversity and natural hazard protection. Although changing climate conditions affect all life stages of a tree, its most vulnerable stage is recruitment. We tested P. sylvestris and P. nigra seedlings to simulated temperature increase and water stress, using seeds from the upper Rhone valley, Switzerland (CH), and from Peñyagolosa, Spain (ES). The experiment was located outdoors at the bottom of the Rhone Valley. Treatments consisted of factorial combinations of 3 precipitation regimes (‘wet spring-wet summer', ‘dry spring-dry summer' and ‘wet spring-dry summer') and 3 soil heating levels (+0 °C, +2.5 °C, +5 °C). Automatically operated shelters intercepted natural rainfall and different precipitation regimes were simulated by manual irrigation. We found significantly lower germination rates under dry conditions compared to wet conditions, whereas soil temperature affected germination rates only for P. nigra and when elevated by 5°C. Contrastingly, an increase of soil temperatures by 2.5 °C already caused a substantial decrease of survival rates under both ‘dry spring-dry summer' and ‘wet spring-dry summer' conditions. Precipitation regime was more important for survival than temperature increase. Seasonality of

  20. Medidas de apoyo a la creación de empresas en el Caribe Colombiano. Análisis de la oferta y la demanda de servicios

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    Liyis Gómez

    2004-01-01

    Full Text Available El propósito de este trabajo es presentar los hallazgos de una investigación realizada en el Caribe colombiano sobre los organismos de apoyo a la creación de empresas. Tomando como marco teórico la teoría económica institucional, se identifican las medidas creadas y las barreras que pueden estar presentándose por el lado de la demanda (conocimiento, utilización y valoración de los programas y por el lado de la oferta (capacidad para desarrollarlos. Los resultados se comparan con España. La información se obtiene de fuentes primaria y secundaria. Se aplicaron 121 entrevistas, 30 a representantes de organismos de apoyo y 91 a empresarios. En términos generales, los resultados muestran el poco conocimiento y utilización de los programas de apoyo existentes.

  1. Simulación de oleaje durante el Huracán Joan (1988) a su paso por el Mar Caribe de Costa Rica

    OpenAIRE

    Lizano Rodríguez, Omar G.; Moya, Roberto

    1990-01-01

    Un modelo numérico de simulación del viento y oleaje durante huracanes fue utilizado para estudiar las características de las olas en agua profunda durante el huracan Joan a su paso por el mar Caribe de Costa Rica en octubre, 1988. Se realizó un pronóstico, cada 3 horas, de la distribución espacial y temporal del oleaje y viento, durante 72 horas, desde que el huracán se encontraba frente a la costa de Panamá el miércoles 19 de octubre hasta que alcanzó tierras nicaragüenses el sábado 22 de o...

  2. Tendencias de la educación superior en el mundo y en América Latina y el Caribe

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    Francisco López Segrera

    2008-06-01

    Full Text Available (elaborado por los editores: Este capítulo es un ejercicio de Educación Superior internacional comparada que ofrece una síntesis de las principales tendencias de la Educación Superior a nivel mundial y en América Latina y el Caribe. También muestra datos y cifras claves, con el objetivo de brindar al lector una aproximación al objeto de estudio.This chapter is an attempt at discussing international higher education from a comparative perspective. It presents a synthesis of the main trends of higher education in the world and in Latin America and the Caribbean countries. It also shows key data and numbers, with the purpose of introducing the reader to the object of study.

  3. Los medios impresos como recurso para la difusión del nacionalsocialismo: sobre boletines y magazines nazis circulando en el Caribe colombiano, 1935-1939

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    JULIÁN ANDRÉS LÁZARO

    2017-01-01

    Full Text Available Este artículo se ocupa de analizar la manera como, en el marco de la estrategia de propaganda y construcción de imaginarios ideada y desarrollada en los años treinta por el gobierno nacionalsocialista alemán, orientada hacia los ciudada - nos del Reich dentro y fuera del país, los alemanes residentes en la ciudad de Barranquilla, en el Caribe colombiano, se convirtieron en receptores, generado - res y difusores de contenidos a través de revistas elaboradas localmente pero de circulación nacional; contribuyendo con ello a la construcción de una imagen positiva del régimen de Hitler y articulándose con el proyecto nazi de uso de medios masivos de comunicación.

  4. La cooperación financiera internacional para la lucha contra el SIDA en América Latina y el Caribe

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    René Leyva-Flores

    2014-07-01

    Full Text Available El objetivo fue analizar la contribución financiera del Fondo Mundial para la Lucha contra el SIDA, y su relación con los criterios de elegibilidad para asignar fondos en América Latina y el Caribe, 2002-2010. Análisis descriptivo (regresión lineal de aportes financieros del Fondo Mundial, según criterios de elegibilidad: nivel de ingreso, carga de la enfermedad, coinversión gubernamental de los países. Las aportaciones financieras correspondieron a US$ 705 millones. Países con menor nivel de ingresos recibieron mayores aportaciones; no hay relación con la carga de la enfermedad. La cooperación financiera internacional realiza aportaciones complementarias al gasto gubernamental, con políticas de equidad en la asignación financiera.

  5. CONTRIBUCIÓN ANTROPOGÉNICA A LOS CAMBIOS GEOMORFOLÓGICOS Y EVOLUCIÓN RECIENTE DE LA COSTA CARIBE COLOMBIANA

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    RANGEL BUITRAGO NELSON

    2010-05-01

    Full Text Available La evolución reciente del Caribe colombiano está asociada, entre otras causas, a una marcada influencia antropogénica sobre la morfología litoral. A lo largo de los 30 municipios costeros que conforman esta región, se encuentran áreas intervenidas por el hombre que al mismo tiempo son afectadas por retrocesos significativos en su línea de costa. La tendencia erosiva predominante es influenciada y multiplicada, en muchos de los casos, por una expansión humana desorganizada y los fenómenos que ésta trae consigo. Un análisis general en algunas áreas permitió identificar acciones realizadas por el hombre, su influencia e sus impactos negativos sobre la geomorfofogía y evolución reciente del sistema litoral

  6. En busca de la igualdad y el reconocimiento. La experiencia histórica de la educación intercultural en el Caribe colombiano

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    Celmira Castro Suárez

    2014-01-01

    Full Text Available Este artículo se ocupa de la experiencia histórica de la educación intercultural en el Caribe colombiano. Para ello da cuenta de la estrecha relación existente entre etnoeducación, interculturalidad y las luchas por la igualdad y el reconocimiento que han debido librar afrodescendientes e indígenas, quienes pretenden avanzar en la cons trucción de espacios educativos de afirmación y respeto de la diversidad. Espacios con los cuales se busca contribuir, entre otras cosas, a superar la marginalidad, la exclusión, el desplazamiento y la violencia de los que han sido víctimas a lo largo del tiempo las minorías étnicas en la región.

  7. Migración calificada y desarrollo humano en América Latina y el Caribe Qualified migration and human develoment in Latin America an the Caribbean

    OpenAIRE

    Fernando Lozano Ascencio; Luciana Gandini

    2011-01-01

    Este artículo examina las tendencias recientes de la migración calificada en América Latina y el Caribe y profundiza en el análisis de la relación entre la migración de recursos humanos calificados y el desarrollo humano en los países de origen de los migrantes. A partir de una mirada teórica plural, y con base en información proveniente del Informe de Desarrollo Humano 2009, presenta evidencia de que la interacción entre migración calificada y desarrollo humano es heterogénea, socialmente di...

  8. La movilidad de profesionales y estudiantes universitarios latinoamericanos y caribeños a países de la OCDE

    OpenAIRE

    Fernando Osvaldo ESTEBAN

    2011-01-01

    En este artículo se investigan las tendencias actuales de la migración calificada de latinoamericanos y caribeños dirigida a países de la OCDE, focalizando a Estados Unidos. A partir de un análisis bibliográfico se discuten las perspectivas teóricas sobre migración calificada y se detectan las tendencias históricas de este proceso en América Latina. Para el análisis empírico se utilizó una novedosa base de datos sobre tasas de emigración según nivel educativo. La evidencia empírica demostró q...

  9. La presencia de corsarios franceses en el Golfo-Caribe entre 1536-1566. Una propuesta de análisis espacial

    Directory of Open Access Journals (Sweden)

    Rodrigo Alejandro de la O Torres

    2016-06-01

    Full Text Available La perspectiva espacial es uno de los aspectos soslayados dentro del estudio del fenómeno de la piratería en el Golfo-Caribe durante la época colonial. El objetivo del texto es arrojar luz en torno a las características generales de la geografía de la presencia y actividad de corsarios, piratas, bucaneros y filibusteros. Para ello, nos delimitamos a la conformación del espacio marítimo del corso francés entre 1536 y 1566. Lo anterior es posible gracias a la reconstrucción, parcial o toral, de rutas corsarias galas. El resultado es la identificación de un proceso de construcción espacial, alterno al hispano, en aquella región.

  10. Tendències investigadores de la ciència de la informació i la biblioteconomia a Iberoamèrica i al Carib

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    Menéndez Echavarría, Alfredo Luis

    2015-12-01

    Full Text Available Objectiu: aquest article presenta categories que mostren tendències investigadores de la ciència de la informació i la biblioteconomia en l'entorn d'Iberoamèrica i el Carib. Les categories han estat producte d'una recerca l'objectiu de la qual es relaciona amb l'anàlisi d'aquests aspectes predictius i prospectius de la disciplina, així com la configuració de l'horitzó d'aquest camp des d'una perspectiva científica. -- Metodologia: l'enfocament que assumeix el projecte és de caràcter mixt, ja que integra l'anàlisi quantitativa i qualitativa, tenint en compte que s'utilitzen tècniques bibliomètriques, i procediments que integren l'ús de variables de mesura i obtenció d'indicadors de producció científica. De la mateixa manera, s'examinen i descriuen els articles seleccionats respecte del seu contingut teoricoepistemològic, recuperats del Web of Science, informació d'Iberoamèrica i del Carib, entre els anys 2009 i 2013, corresponents als títols de revistes que integren la categoria temàticaObjetivo: este artículo presenta categorías que evidencian tendencias investigativas de la ciencia de la información y la bibliotecología en el entorno de Iberoamérica y el Caribe. Estas han sido producto de una investigación cuyo objetivo se relaciona con el análisis de estos aspectos predictivos y prospectivos de la disciplina, así como la configuración del horizonte de este campo desde una perspectiva científica. -- Metodología: el enfoque que asume el proyecto es de carácter mixto, pues integra el análisis cuantitativo y cualitativo, teniendo en cuenta que se utilizan técnicas bibliométricas, y procedimientos que integran el uso de variables de medición y obtención de indicadores de producción científica. De igual modo se examinan y describen los artículos seleccionados respecto de su contenido teórico-epistemológico, recuperados de la Web of Science, información de Iberoamérica y el Caribe, entre los años 2009 y

  11. Abundancia y distribución de larvas de Strombus gigas (Mesogastropoda: Strombidae durante el período reproductivo de la especie en el Caribe Mexicano

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    José Francisco Chávez Villegas

    2012-03-01

    Full Text Available El caracol rosa (Strombus gigas, Linnaeus, 1758 es una especie de importancia económica en el Mar Caribe, por lo cual, en la década de 1980 representó la segunda pesquería después de la langosta espinosa, razón por la que actualmente se encuentra en estado de sobrepesca. Con el objetivo de determinar la variación en la abundancia de larvas durante la época reproductiva, cuatro localidades del Caribe Mexicano “CM” (México: Puerto Morelos, Sian Ka’an, Mahahual; Belice: San Pedro fueron muestreadas. Mensualmente, de mayo a octubre del 2008, se realizaron arrastres de plancton en cada localidad empleando una red cónica (300μm. Temperatura (°C, salinidad (ppm y oxígeno disuelto (mg L-1 fueron registrados para cada sitio. Una densidad media larval de 0.34±0.87 larvas•10m-3 fue registrada entre localidades, con un pico de abundancia entre agosto y septiembre (0.82±1.00 y 0.76±1.68 larvas 10m-3, respectivamente. La densidad larval tuvo una correlación del 60% con la salinidad (r=0.6063, p0.05. El 100% de las larvas capturadas corresponden al estadio I definido por Davis et al (1993, mostrando actividad reproductiva local, de esta manera, se considera que los sitios muestreados en el CM son fuente de larvas para la especie S. gigas.

  12. Dos propuestas de clasificación climática para la vertiente Caribe costarricense según el sistema de Thornthwaite

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    Paula M. Pérez-Briceño

    2017-01-01

    Full Text Available Una alta variabilidad espacio-temporal en la temperatura y la precipitación son características del territorio costarricense, con una diferencia climática fuerte entre las dos vertientes, la Pacífica y el Caribe. La primera por estar a sotavento de la cadena central de montañas posee un régimen de menor humedad atmosférica mientras que la ladera a barlovento, recibe los vientos alisios cargados de humedad que determinan el clima de la vertiente Caribe, donde llueve prácticamente todo el año. Se analizaron las variables meteorológicas: lluvia y temperatura superficial del aire, integrándolas al relieve en busca de patrones climáticos para asociar las estaciones meteorológicas a un grupo climático determinado. Se utilizaron 82 estaciones meteorológicas con registros de diez años o más. Este trabajo tiene como objetivo elaborar dos propuestas de clasificación climática basadas en el balance hídrico de acuerdo al método de Thornthwaite. La evapotranspiración potencial (ETP se estimó de acuerdo a Thornwaite y Hargreaves. A pesar de la diferencia en los resultados de la evapotranspiración potencial debido a la forma en que se estima en cada uno de los métodos, se encuentra que la región varía entre subhúmeda, húmeda y excesivamente húmeda.

  13. O Brasil e o Grão Caribe: fundamentos para uma nova agenda de trabalho Brazil and the Great Caribbean basin: the making of a new agenda

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    Carlos Federico Domínguez Avila

    2008-01-01

    Full Text Available O artigo aborda as relações econômicas, políticas e de segurança internacional vigentes entre o Brasil e os 25 países da bacia do Caribe - México, América Central, Antilhas, Colômbia, Venezuela, Guiana e Suriname, além de uma dezena de territórios coloniais administrados por potências extra-regionais. Constata-se que as relações econômicas são muito intensas, especialmente em termos comerciais e de investimentos produtivos. O diálogo político entre as partes é construtivo, relevante e cada vez mais significativo. No que diz respeito às questões de segurança, vale destacar suas convergências, bem como certas divergências de natureza geopolítica derivadas do projeto brasileiro para a América do Sul. No final do artigo, propõem-se três cenários plausíveis para o futuro das relações entre Brasil e Caribe.The paper explores the economic, political and security relations between Brazil and the 25 Caribbean countries - Mexico, Central America, the Caribbean islands, Colombia, Venezuela, Guiana and Suriname, inasmuch the colonial territories. The text suggest that the economic relations are very intensive. The political dialogue is constructive. In the security field, there are some convergences and divergences derived from the brazilian=s South American project. At the end, the paper consider three reasonable scenarios for the Brazilian-Caribbean relations.

  14. Estrategias de visibilización de la diáspora africana en América Latina y el Caribe durante el nuevo milenio

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    María José Becerra

    2008-01-01

    Full Text Available Las sociedades de América Latina y el Caribe presentan una complejidad fruto de un pasado histórico, en donde se entrecruzan diferentes formas de explotación sobre una población heterogénea. Consecuentemente, el ejercicio de la dominación construido por los grupos hegemónicos marginó a las mayorías sociales y particularmente a los descendientes de la diáspora forzada africana. La conformación de los Estados nacionales decimonónicos, lejos de revertir la problemática, instaló una nueva dicotomía entre los “civilizados” y los “bárbaros”, coartando con ello la posibilidad de gestar un espacio integrador de las sociedades americanas de carácter multicultural. Desde 2000, estas acciones han logrado que organizaciones internacionales presten atención a la problemática de los afrodescendientes en América Latina y el Caribe apoyando y estimulando la búsqueda de nuevas estrategias, ahora a nivel continental e interregional. En este sentido nos proponemos realizar una reseña de las actividades que los afrodesceninetes vienen realizando en pos de ser visibilizados. Visibilidad que no sólo tiende a mejorar su situación particular, sino también a que las sociedades americanas sean más democráticas y pluralistas.

  15. Palaemonidae (Crustacea: Decapoda: Caridea from the shallow waters from Quintana Roo, Mexican Caribbean coast Palaemonidae (Crustacea: Decapoda: Caridea de las aguas someras de Quintana Roo, Caribe mexicano

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    Ramiro Román-Contreras

    2010-04-01

    Full Text Available Few studies have focused on the palaemonid fauna of the Mexican Caribbean. This study provides a list of shallow water free-living and symbiont shrimps of the family Palaemonidae collected on turtle grass (Thalassia testudinum in Bahía de la Ascensión, Bahía del Espíritu Santo and Mahahual reef lagoon, Quintana Roo, Mexico. Ten species in 8 genera are reported, of which the genus Periclimenes is the most diverse with 3 species. An updated geographic distribution along the western Atlantic and other regions is provided for all the species. The greatest affinity of the palaemonid fauna studied, besides that with the Caribbean province, is with the Brazilian, Argentinian, and Texan zoogeographic provinces. Of the 10 species reported in this paper, 8 represent new local records in the studied area.Los crustáceos de la familia Palaemonidae del Caribe mexicano han sido poco estudiados. En este trabajo se presenta un listado de palemónidos de vida libre y simbiontes recolectados en el pasto marino Thalassia testudiuim de Bahía de la Ascensión, Bahía del Espíritu Santo y la laguna arrecifal de Mahahual, Quintana Roo, México. Se registran 10 especies pertenecientes a 8 géneros, siendo el género Periclimenes el más diverso con 3 especies. Para todas las especies se proporciona su distribución geográfica en la costa del Atlántico americano así como en otras regiones. Además de la provincia Caribeña, los palemónidos recolectados también muestran alta afinidad con otras provincias zoogeográficas como la Brasileña, Argentina y Texana; de las 10 especies registradas en este estudio, 8 representan nuevo registro local en el área estudiada.

  16. La Unión de Universidades de América Latina y el Caribe (UDUAL y la autonomía universitaria

    Directory of Open Access Journals (Sweden)

    Galo Burbano López

    2011-07-01

    Full Text Available En un trabajo sobre autonomía y legitimidad en la universidad pública latinoamericana, dos redes universitarias sobresalen por su sentido y alcance regional, por su vinculación con las universidades públicas, particularmente con las que son objeto del proyecto alesal: por el compromiso con la autonomía, la udual, y por las perspectivas de futuro, la Red de Macrouniversidades Públicas de América Latina y el Caribe. La primera muestra una historia de realizaciones de más de sesenta años y una preocupación permanente por la autonomía universitaria, y como tal nos limitaremos a considerarla. La segunda, concebida como un proyecto interinstitucional para responder conjuntamente a los desafíos del siglo xxi, por no mostrar todavía muchas realizaciones no hará parte de esta presentación. La Unión de Universidades de América Latina y el Caribe (udual es la única entidad asociativa universitaria de nuestra región que ha tenido desde su origen hasta el presente vinculadas a las universidades públicas más representativas, entre ellas la Universidad Nacional Autónoma de México, la Universidad de São Paulo, la Universidad de Buenos Aires, y la Universidad Nacional de Colombia. La Universidad de Chile mantuvo su afiliación desde el surgimiento de la unión hasta hace unos años.

  17. Volume de madeira de Pinus taeda L. em diferentes espaços vitais de crescimento. Wood volume of Pinus taeda L. at different growing spacings.

    Directory of Open Access Journals (Sweden)

    Rodrigo LIMA

    2015-12-01

    Full Text Available Pinus taeda L. é uma das espécies do gênero Pinus mais plantadas na região Sul do Brasil por apresentar excelente crescimento e ótima adaptação às condições climáticas e de solo. Essa espécie é utilizada em larga escala, principalmente para a produção de celulose, construção civil, laminação, produção de móveis, particulados e serraria. Objetivou-se avaliar a produção volumétrica de Pinus taeda L. em diferentes espaços vitais de crescimento (entre 1 m2 e 16 m2 por planta propiciados por nove diferentes espaçamentos entre árvores de um ensaio em cinco blocos ao acaso. O trabalho baseou-se nas medidas de altura e DAP em 25 árvores internas da parcela, aos sete anos após plantio das mudas oriundas de pomar de sementes clonal. Valores estimados de volume por hectare foram inversamente proporcionais ao aumento do espaço vital, alcançando entre 74,2 e 274,8 m3 /ha. Os incrementos médios em volume atingiram entre 10,60 e 39,25 m3 /ha/ano. Concluiu-se que, se o objetivo é a produção volumétrica mesmo com diâmetros pequenos, deve-se optar por espaços vitais menores. Quando se deseja maiores diâmetros, a opção é por espaços maiores. No presente caso, o melhor compromisso entre produção volumétrica e diâmetros grandes pode estar nos espaços vitais intermediários, entre 5 e 8 m2 para cada árvore. Pinus taeda L. is one of the most Pinus species planted in southern Brazil, because it presents excellent growth and optimum adaptation to climatic and soil condition. The species is used in large scale, mainly for cellulose production, construction, laminating, production of furniture, particulates and sawmill. It was aimed to evaluate the Pinus taeda L. volumetric production at different growth vital spaces (ranging 1 m² and 16 m² per plant provided by nine different spacings between plants, the trial was installed in a randomized blocks with five replications. The study was based on height and DBH measurements

  18. Organismos de un arrecife fósil (Oligoceno Superior-Mioceno Inferior, del Caribe de Costa Rica

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    Teresita Aguilar Alvarez

    1999-09-01

    Full Text Available En la localidad de Jesús María, Turrialba, afloran de 12-30 m de calizas arrecifales, areniscas y conglomerados de edad Oligocena Superior-Miocena Inferior, que se asocian con la Formación Punta Pelada. En ésta localidad se registra una de las primeras comunidades arrecifales de la actual región Caribe de Costa Rica y constituye una de las pocas localidades de arrecifes de ésta edad en el área. Los afloramientos se interpretan como parches arrecifales debido a su distribución irregular y a su poca extensión lateral (50m, los cuales se desarrollaron bajo la influencia de diversos procesos: variación en la energía del medio, cambios en el nivel del mar, plataformas angostas, excesiva sedimentación clástica posiblemente desde islas. Se analizaron 460 ejemplares, los cuales corresponden a más de 36 especies, que permitieron hacer una recosnstrucción de la estructura y de las condiciones ambientales en que se desarrollaron. Los arrecifes constituyeron comunidades de baja diversidad: cuatro especies de corales (tres de constructores, 31 especies de moluscos (21 de Gastrópodos: una especie nueva, 14 de carnívoros, tres de herbívoros, tres de hábitos alimenticios desconocidos; 10 especies de Bivalvos: cinco endobentónicos, cinco epibentónicos, algas (representantes de por lo menos tres grupos, equinodermos, foraminíferos, crustáceos. La equidad también es muy baja, principalmente en lo referente a los corales Scleractinia, con un predominio muy marcado de Antiguastrea celullosa (80% de las formas encontradas. Esto permite inferir que se desarrollaron en un ambiente de poca profundidad (50-80 m, muy variable, con influencia ocasional de corrientes marinas fuertes y aporte de sedimentos terrígenos procedentes de islas cercanas.This paper describes the fossils, materials and paleoenvironmental conditions found in some outcrops near the town of Jesús María, Turrialba, Costa Rica. The rock materials (reefal limestone, sandstones

  19. La Universidad Virtual de Ciencias de la Salud de América Latina y el Caribe.

    Directory of Open Access Journals (Sweden)

    Jaime Requena

    2000-04-01

    Full Text Available

    Fundamentos y Viabilidad.

    No se puede pretender llevar a cabo una Reforma del Sector Salud sin una descentralización ordenada y armónica de los servicios y actividades propias. La Reforma conlleva un reentrenamiento de los profesionales al servicio del Sector y ello se puede hacer, hoy en día, mediante novedosas tecnologías pedagógicas que son tan eficiente como las tradicionales, a un costo mucho menor y con mayor cobertura e impacto. La educación continua a distancia —virtual pero interactiva— no es sólo una realidad sino definitivamente asequible aun en medio de las grandes dificultades económicas. Ello, gracias a los inmensos avances en el la informática y las nuevas tecnologías comunicacionales.

    La Universidad Virtual de Ciencias de la Salud de la América latina y del Caribe (o Proyecto Vi@Salud está diseñada para aplicar las nuevas tecnologías educativas y de la información para el aprendizaje a distancia, utilizando diferentes alternativas de tecnologías telemáticas que permitan la interacción, en tiempo real, del educando con el educador. Su objetivo es proveer a los servicios de salud con los contenidos educativos según la demanda de los usuarios y que son fiel reflejo de sus necesidades.

    Por su naturaleza, integra estándares internacionales al proceso educativo, estimulando la evaluación permanente y la acreditación tanto institucional como profesional. El modelo educativo adoptado esta centrado igualmente en el educando como el educador, quien actúa como facilitador y orientador en la búsqueda de la solución de los problemas, núcleo fundamental de la actividad estudiantil.

    Los niveles de acción del proyecto son: el institucional, el profesional y el comunitario. El estudio de factibilidad del proyecto demuestra viabilidad económica en cuanto a que tenga una cobertura regional y logre una penetración del orden de 50.000 usuarios en cinco años. La gerencia de

  20. El Caribe reflejado en el Carnaval de Cádiz con el Atlántico como espejo

    Directory of Open Access Journals (Sweden)

    ANA MARÍA BARCELÓ CATALAYUD

    2017-01-01

    ño nuevas y diferentes, constituyen el eje más significativo y diferenciador con respecto a otros carnavales del mundo. La expresión del carnaval gaditano ha evolucionado al compás de acontecimientos históricos, cambios sociales, tendencias musicales, estrenos de teatro o cine y, en las últimas décadas, por la televisión y los nuevos medios. La evolución del Carnaval de Cádiz no se ha producido de una manera automática ni continua. Después de casi dos siglos de historia, todo hace pensar que este movimiento cadencioso que transporta al otro lado del océano las imágenes de los pueblos del Caribe y se hace Carnaval en Cádiz continuará recordando la permanente vinculación, a través del Atlántico, que une las orillas de Oriente y Occidente a través de sus aguas, convertidas en espejo en el que se reflejan costumbres, personajes y culturas.

  1. Streamflow responses to afforestation with Eucalyptus grandis and Pinus patula and to felling in the Mokobulaan experimental catchments, South Africa

    CSIR Research Space (South Africa)

    Scott, DF

    1997-12-10

    Full Text Available The reductions in streamflow following the afforestation of grassland with Eucalyptus grandis and Pinus patula in the Mokobulaan research catchments on the Mpumalanga escarpment, and the subsequent response in streamflow to clearfelling...

  2. Cytoprotective effects of essential oil of Pinus halepensis L. against aspirin-induced toxicity in IEC-6 cells.

    Science.gov (United States)

    Bouzenna, Hafsia; Hfaiedh, Najla; Bouaziz, Mouhamed; Giroux-Metges, Marie-Agnès; Elfeki, Abdelfattah; Talarmin, Hélène

    2017-12-01

    Essential oils from Pinus species have been reported to have various therapeutic properties. This study was undertaken to identify the chemical composition and cytoprotective effects of the essential oil of Pinus halepensis L. against aspirin-induced damage in cells in vitro. The cytoprotection of the oil against toxicity of aspirin on the small intestine epithelial cells IEC-6 was tested. The obtained results have shown that 35 different compounds were identified. Aspirin induced a decrease in cell viability, and exhibited significant damage to their morphology and an increase in superoxide dismutase (SOD) and catalase (CAT) activities. However, the co-treatment of aspirin with the essential oil of Pinus induced a significant increase in cell viability and a decrease in SOD and CAT activities. Overall, these finding suggest that the essential oil of Pinus halepensis L. has potent cytoprotective effect against aspirin-induced toxicity in IEC-6 cells.

  3. Intentando leer el Caribe

    Directory of Open Access Journals (Sweden)

    Juan Carlos Rodríguez

    2011-06-01

    Full Text Available La primera sorpresa al releer a Alejo Carpentier se nos ofrece sin duda como la clave de cualquier escritura novelística: quiero decir, hasta qué punto Carpentier es capaz de “suspender nuestra incredulidad”, como indicaba Coleridge. De ahí la sorpresa: hoy es difícil leer novelas y mucho más creérnoslas. Afortunadamente Carpentier escribió en un momento en que aún se creía en la Literatura (precisamente casi el último o mejor momento, en que aún se creía en ese milagro de contar historias cotidianas como si fueran “maravillas”.

  4. Usage of the pruned log index for loblolly pine (Pinus taeda and slash pine (Pinus elliottii Aplicação do Índice de Tora Podada para Pinus taeda e Pinus elliottii

    Directory of Open Access Journals (Sweden)

    Denise Jeton Cardoso

    2010-10-01

    Full Text Available

    The assessment of the quality of clearwood produced in pruned plantations of pine is necessary, especially to set price and know the utilization potential. The pruned log index (PLI, index used in Chile and New Zealand to characterize the quality of the logs, is a function of measurable variables of each log as diameter with defects, diameter 1.3 m from the largest end and the ratio between the cylinder volume common to the entire length of the log and the scaling volume through the method Smalian. This study aims at evaluating the ITP usage for slash pine (Pinus elliottii logs at the age 24 years and loblolly pine (Pinus taeda at 19, harvested
    in the regions of Ibaiti, Paraná, and Itapeva, São Paulo. The PLI values did not exceed 2.3, which  indicates that there is little clearwood on the logs. This has been proven through the veneering results, in which the potentially clear volume in relation to the log volume ranged between 52% and 55%, but 10.3% at the maximum, was turned into clearwood veneer. The slicing procedure in the lathe proved to be suitable, since it allowed the diameter of the knotty core to be measured as soon as the knot came out. The PLI showed itself as applicable for the Brazilian conditions.

    doi: 10.4336/2010.pfb.30.62.119