Prácticas culturales para el manejo de la Sigatoka negra en bananos y plátanos

Black sigatoka (Mycosphaerella fijiensis) control consists in the continuous use of fungicide sprays and cultural practices. Cultural control reduces inoculum sources of the pathogen and favorable environmental conditions for its development, as well as it increases the vigor of the plants. In order to manage the disease it is necessary to know its behavior through the time, its relationship with the weather and the crop management. The most important cultural practice to reduce the inoculum source is the removal of the whole affected leaves or only the diseased portions of the leaves. The removed tissue is placed over the ground and the use of urea is feasible to accelerate its decomposition. An alternative practice is the "mini-composting" that consists in forming small heaps with the dead leaves and harvested plants for its quick degradation, which allows to reduce the pathogen inoculum and to incorporate nutrients and organic matters into the soil. The early pruning of the tips of the Young leaves before they show symptoms of the disease and the quick elimination of harvested plants reduce the inoculum. Also, the agronomic management of the crop helps to reduce the favorable conditions and to increase the vigor of the plants: this management considers plantation density, drainage systems, irrigation methods, control of weeds, chemical-biological fertilization, and nematode control.

Determinación de factores de emisión para pm10 proveniente de construcción de vías, edificaciones y canteras en Bogotá

Bogotá (Colombia) : Universidad de La Salle. Facultad de Ingeniería. Programa de Ingeniería Ambiental y Sanitaria

Desfile de bienvenida al Gonbernador del Departamento Humberto González Narvaéz (1964-1966)

Desfile de bienvenida al Gonbernador del Departamento Humberto González Narvaéz (1964-1966). Calle principal Versalles, 1965.

Estudiantes del colegio Manuela Beltrán

Estudiantes del colegio Manuela Beltrán. Aparecen, entre otras, Isabel Gallego, Nelly Reyes y Ligia León. Versalles, 1958.

Panorámica de la Plaza principal, donde sobresale la arquitectura republicana

Panorámica de la Plaza principal, donde sobresale la arquitectura republicana. Versalles, 1955.

Procesión en honor a la Inmaculada Concepción, patrona del pueblo

Procesión en honor a la Inmaculada Concepción, patrona del pueblo. Versalles. C. 1950.

Physiotherapy practices and third party payers: issues in professional ethics in British Columbia

[À l'origine dans / Was originally part of : ESPUM - Dép. médecine sociale et préventive - Travaux et publications]

Physiotherapy practices and third party payers: issues in professional ethics in the Prairie provinces

[À l'origine dans / Was originally part of : ESPUM - Dép. médecine sociale et préventive - Travaux et publications]

Physiotherapy practices and third party payers: issues in professional ethics in Ontario

[À l'origine dans / Was originally part of : ESPUM - Dép. médecine sociale et préventive - Travaux et publications]

Physiotherapy practices and third party payers: issues in professional ethics in the Northern territories

[À l'origine dans / Was originally part of : ESPUM - Dép. médecine sociale et préventive - Travaux et publications]

Physiotherapy practices and third party payers: issues in professional ethics in Quebec

[À l'origine dans / Was originally part of : ESPUM - Dép. médecine sociale et préventive - Travaux et publications]

Plan estratégico para el control de roedores y palomas en la corporación de abastos de Bogotá S.A.

Tesis (Médico Veterinario). -- Universidad de La Salle. Facultad de Ciencias Agropecuarias. Programa de Medicina Veterinaria, 2014

Panorámica de la ciudad

Panorámica de la ciudad. Versalles, 1958.

Studying the role of the strawberry Fra protein family in the flavonoid metabolism during fruit ripening

Strawberry fruits are highly appreciated worldwide due to their pleasant flavor and aroma and to the health benefits associated to their consumption. An important part of these properties is due to their content in secondary metabolites, especially phenolic compounds, of which flavonoids are the most abundant in the strawberry fruit. Although the flavonoid biosynthesis pathway is uncovered, little is known about its regulation. The strawberry Fra a (Fra) genes constitute a large family of homologs of the major birch pollen allergen Bet v 1 and for which no equivalents exist in Arabidopsis. Our group has shown that Fra proteins are involved in the formation of colored compounds in strawberries (Muñoz et al., 2010), which mainly depends on the production of certain flavonoids; that they are structurally homologs to the PYR/PYL/RCAR Arabidopsis ABA receptor, and that they are able to bind flavonoids (Casañal et al., 2013). With these previous results, our working hypothesis is that the Fra proteins are involved in the regulation of the flavonoids pathway. They would mechanistically act as the ABA receptor, binding a protein interactor and a ligand to regulate a signaling cascade and/or act as molecular carriers. The main objective of this research is to characterize the Fra family in strawberry and gain insight into their role in the flavonoid metabolism. By RNAseq expression analysis in ripening fruits we have identified transcripts for 10 members of the Fra family. Although expressed in all tissues analyzed, each family member presents a unique pattern of expression, which suggests functional specialization for each Fra protein. Then, our next approach was to identify the proteins that interact with Fras and their ligands to gain knowledge on the role that these proteins play in the flavonoids pathway. To identify the interacting partners of Fras we have performed a yeast two hybrid (Y2H) screening against cDNA libraries of strawberry fruits at the green and red stages. A protein that shares a 95% homology to the Heat stress transcription factor A-4-C like of Fragaria vesca (HSA4C) interacts specifically with Fra1 and not with other family members, which suggests functional diversification of Fra proteins in specific signaling pathways. The Y2H screening is not yet saturated, so characterization of other interacting proteins with other members of the Fra family will shed light on the functional diversity within this gene family. This research will contribute to gain knowledge on how the flavonoid pathway, and hence, the fruit ripening, is regulated in strawberry; an economically important crop but for which basic research is still very limited. References: Muñoz, C, et al. (2010). The Strawberry Fruit Fra a Allergen Functions in Flavonoid Biosynthesis. Molecular Plant, 3(1): 113–124. Casañal, A, et al (2013). The Strawberry Pathogenesis-related 10 (PR-10) Fra a Proteins Control Flavonoid Biosynthesis by Binding Metabolic Intermediates. Journal of Biological Chemistry, 288(49): 35322–35332.

Marco regulatorio Solvencia II – Pilar cuantitativo aplicado a las condiciones de riesgo de una compañía aseguradora en Colombia

En el contexto de las compañías aseguradoras, el capital representa la solidez y capacidad de una compañía para responder ante las obligaciones adquiridas con los clientes en escenarios de pérdidas inesperadas -- Con la experiencia de las pasadas crisis se ha venido aumentando la exigencia de capital y para estimar este capital, el marco regulatorio europeo propone una metodología basada en riesgos, la cual se conoce como Solvencia II -- Sin embargo, en Colombia la metodología exigida en la actualidad no contempla la totalidad de riesgos a los que se encuentra expuesta una compañía en este sector -- El propósito de este trabajo es determinar las bases para el cálculo del capital, basado en riesgo de una compañía aseguradora en Colombia, adaptando las exigencias propuestas por Solvencia II a las condiciones del mercado colombiano -- Lo anterior, se realiza cuantificando las principales variables de riesgo relacionadas con el entorno financiero y de negocio de las compañías en Colombia