Información Investigador: Melandri Pirela, José Luis

Maestría43 - 2003Agosto de 2005Ingeniero Forestal+58 274 2401526Facultad de Ciencias Forestales y [email protected]

Xylen anatomy studies of live commercial species of Subfamily Mimosoideae from Venezuela

[email protected]@ula.v

Wood anatomy of tribe Detarieae and comparison with tribe Caesalpinieae (Leguminosae, Caesalpinioideae) in Venezuela

We studied the wood anatomy of 29 species belonging to 10 genera of the tribe Detarieae, subfamily Caesalpinioideae and compare them with tribe Caesalpinieae. Detarieae is the largest of four tribes of Caesalpinioideae, with 84 genera, only eleven occur in Venezuela with species of timber importance. The specimens were collected in Venezuela and include wood samples from the collection of the Laboratorio de Anatomía de Maderas de la Facultad de Ciencias Forestales y Ambientales de la Universidad de Los Andes, Venezuela, and of the Forest Products Laboratory of the USDA Forest Service in Madison, Wisconsin, USA. The terminology and methodology used followed the IAWA List of Microscopic Features for Hardwood Identification of the IAWA Committee, 1989. Measurements from each specimen were averaged (vessel diameters, vessel element lengths, intervessels pit size, fibre lengths and ray height). The species of Detarieae can be separated using a combination of diagnostic features. Wood characters that provide the most important diagnosis and may be used in systematics of Detarieae include: intercellular axial canals, rays heterocellular, rays exclusively or predomi- nantly uniseriate, prismatic crystals common in ray cells, irregular storied structure and fibre wall thickness. For comparative anatomy between Detarieae and Caesalpinieae: intercellular axial canals, heterocellular rays, rays exclusively or predominantly uniseriate, prismatic crystals common in ray cells (in Detarieae) and regular storied structure, fibres septate, fibre wall thick or very thick, rays homocellular, multiseriate rays and silica bodies (in Caesalpinieae). Axial parenchyma is typically a good diagnostic feature for Leguminosae, but not for Detarieae and Caesalpinieae comparisons.Se estudió la anatomía de la madera de 29 especies de 10 géneros de la tribu Detarieae, subfamilia Caesalpinioideae, enfocado hacia la identificación de la estructura de la madera y su comparación con la tribu Caesalpinieae. Los especímenes fueron recolectados en Venezuela y pertenecen a la colecciones de maderas del Laboratorio de Anatomía de Maderas de la Facultad de Ciencias Forestales y Ambientales de la Universidad de Los Andes, Mérida, Venezuela y del USDA Forest Service, Forest Products Laboratory, Madison, Wisconsin, USA. Las características anatómicas evaluadas siguen lo propuesto por IAWA List of Microscopic Features for Hardwood Identification (IAWA Committee 1989). Las especies de la tribu Detarieae pueden ser identificadas usando un número de características de diagnóstico combinadas: canales intercelulares longitudinales, radios hete- rocelulares exclusiva o predominantemente uniseriados, patrones del parénquima axial, cristales prismáticos en las células radiales, estructura estratificada y grosor de las paredes de las fibras. Estos caracteres también proporcionan una valiosa información para estudios sistemáticos y filogenéticos. Se presenta la descripción anatómica a nivel de género, una tabla sinóptica con los caracteres de diagnóstico principales y fotomicrografías de las características más importantes

Druse type crystals in the xylem of Cassia grandis L.f. (Caesalpinoideae)

[email protected]@ula.v

Growth ring periodicity in Pinus caribaea var. hondurensis from a Mérida state plantation, Venezuela

CONTENIDO Editorial.La educación agroforestal en la facultad de ciencias forestales y ambientales.Agroforestry education at the forestry and environmental sciences faculty. Petit Aldana, Judith Artículo Mejoramiento en la eficiencia de fertilizantes químicos con biofertilizantes para producir maíz en suelo Alfisol (Chac-lu’um). Chemical fertilizer efficiency improvement with biofertilizer to produce maize in Alfisol soil (Chac-lu’um). Uribe V., Gabriel; Petit, Judith y Roberto, Dzib E. Relaciones fenéticas en especies de Sterculia L. (Sterculiaceae) en Venezuela. Sterculia L. species (Sterculiaceae) phenetic relationships in Venezuela. Mondragón, Alcides; Máyida, Elsouki y Castillo, Aníbal Principales causas de la deforestación en la vertiente sur del Parque Nacional Sierra Nevada, Venezuela. Deforestation main causes in the south slope of Sierra Nevada National Park, Venezuela. Gómez T., Hugo A. y Molina, Misael Dinámica sucesional del componente arbóreo, luego de un estudio destructivo de biomasa, en el bosque universitario San Eusebio, Mérida-Venezuela. Arboreal component sucesional dynamics, after a destructive study of biomass, in San Eusebio university forest, Mérida, Venezuela. Ramos, María Cristina y Plonczak Ratschiller, Miguel Andrés Establecimiento de lianas sobre los árboles de un bosque del chaco húmedo argentino. Tree liana establishment of a forest from the argentinean humid chaco. Lorea, Luciano y Brassiolo, Miguel Periodicidad de los anillos de crecimiento en Pinus caribaea var. hondurensis proveniente de una plantación delestado Mérida, Venezuela. Growth ring periodicity in Pinus caribaea var. hondurensis from a Mérida State plantation, Venezuela. Melandri, José Luis; Dezzeo, Nelda y Espinoza de Pernía, Narcisana Planificación de la explotación de impacto reducido como base para un manejo forestal sustentable en un sector de la Guayana venezolana. Reduced impact exploitation planning as a base for a sustainable forest management in an area of the Venezuelan Guyana. Noguera L., Oscar E.; Pacheco A., Carlos E.; Plonczak Ratschiller, Miguel Andrés; Jeréz R., Mauricio; Moret, Ana Yajaira; Quevedo R., Ana Mercedes y Carrero G., Omar E. Potencial papelero de clones de Hevea brasiliensis procedentes del estado Amazonas, Venezuela. Paper potential of Hevea brasiliensis clones from Amazonas State, Venezuela. Zerpa, Juan; Mogollón, Gladys M.; Gutiérrez G., Ilvania y Aguilera, Antonio V. Ecuaciones de volumen para árboles de Samán (Samanea saman (Jacq.) Merr.), provenientes de potreros en el municipio Machiques de Perijá, Estado Zulia, Venezuela. Volume equations for Saman (Samanea saman (Jacq.) Merr.) trees growing in pasture lands of Zulia state, Venezuela. Moret, Ana Yajaira; Ortiz, Alba Guadalupe; Pérez, Yorfreddy; Quijada, Marcelino y Jeréz R., Mauricio Variabilidad de los vasos en Gmelina arborea Roxb. (Verbenaceae) proveniente de plantaciones del estado Portuguesa (Venezuela). Variability in vessels of Gmelina arborea Roxb. (Verbenaceae) from plantations in Portuguesa State (Venezuela). León Hernández, Williams J. y Quintero M., Maria [email protected]@ula.veNivel analíticosemestra

Avaliação da Dispersão de Sementes de Pinus taeda L. pela Análise dos Anéis de Crescimento de Árvores de Regeneração Natural

RESUMO As árvores de Pinus taeda – introduzidas no Brasil em 1880 e em ensaios experimentais em 1936 – têm sido relacionadas na literatura especializada ao processo de invasão biológica de algumas áreas de campos gerais e de altitude dos estados do Paraná e Santa Catarina, de cerrado no estado de São Paulo, de restinga no estado de Santa Catarina e de pampas no estado do Rio Grande do Sul. Os anéis de crescimento anuais formados no lenho das árvores de Pinus taeda constituem importante ferramenta na avaliação do processo de invasão biológica. Com esse objetivo, no presente trabalho avaliou-se a dispersão espacial-temporal de sementes analisando-se os anéis de crescimento do lenho de árvores de Pinus taeda de plantações e de regeneração natural na região de Faxinal do Céu, estado do Paraná. Os resultados possibilitaram determinar a idade e a taxa de crescimento do tronco das árvores de Pinus taeda de plantações, a data da germinação, a área de dispersão das sementes e a taxa de crescimento das árvores de regeneração natural. Os resultados permitem, da mesma forma, discutir o processo de invasão de árvores de Pinus taeda pela dispersão das sementes em áreas limítrofes às plantações florestais

Memorias IX Congreso Geológico Venezolano (2)

IX Congreso Geológico Venezolano (2

Correction to: Comparative effectiveness and safety of non-vitamin K antagonists for atrial fibrillation in clinical practice: GLORIA-AF Registry

International audienceIn this article, the name of the GLORIA-AF investigator Anastasios Kollias was given incorrectly as Athanasios Kollias in the Acknowledgements. The original article has been corrected

Patterns of oral anticoagulant use and outcomes in Asian patients with atrial fibrillation: a post-hoc analysis from the GLORIA-AF Registry

Background: Previous studies suggested potential ethnic differences in the management and outcomes of atrial fibrillation (AF). We aim to analyse oral anticoagulant (OAC) prescription, discontinuation, and risk of adverse outcomes in Asian patients with AF, using data from a global prospective cohort study. Methods: From the GLORIA-AF Registry Phase II-III (November 2011-December 2014 for Phase II, and January 2014-December 2016 for Phase III), we analysed patients according to their self-reported ethnicity (Asian vs. non-Asian), as well as according to Asian subgroups (Chinese, Japanese, Korean and other Asian). Logistic regression was used to analyse OAC prescription, while the risk of OAC discontinuation and adverse outcomes were analysed through Cox-regression model. Our primary outcome was the composite of all-cause death and major adverse cardiovascular events (MACE). The original studies were registered with ClinicalTrials.gov, NCT01468701, NCT01671007, and NCT01937377. Findings: 34,421 patients were included (70.0 ± 10.5 years, 45.1% females, 6900 (20.0%) Asian: 3829 (55.5%) Chinese, 814 (11.8%) Japanese, 1964 (28.5%) Korean and 293 (4.2%) other Asian). Most of the Asian patients were recruited in Asia (n = 6701, 97.1%), while non-Asian patients were mainly recruited in Europe (n = 15,449, 56.1%) and North America (n = 8378, 30.4%). Compared to non-Asian individuals, prescription of OAC and non-vitamin K antagonist oral anticoagulant (NOAC) was lower in Asian patients (Odds Ratio [OR] and 95% Confidence Intervals (CI): 0.23 [0.22-0.25] and 0.66 [0.61-0.71], respectively), but higher in the Japanese subgroup. Asian ethnicity was also associated with higher risk of OAC discontinuation (Hazard Ratio [HR] and [95% CI]: 1.79 [1.67-1.92]), and lower risk of the primary composite outcome (HR [95% CI]: 0.86 [0.76-0.96]). Among the exploratory secondary outcomes, Asian ethnicity was associated with higher risks of thromboembolism and intracranial haemorrhage, and lower risk of major bleeding. Interpretation: Our results showed that Asian patients with AF showed suboptimal thromboembolic risk management and a specific risk profile of adverse outcomes; these differences may also reflect differences in country-specific factors. Ensuring integrated and appropriate treatment of these patients is crucial to improve their prognosis. Funding: The GLORIA-AF Registry was funded by Boehringer Ingelheim GmbH