170,389 research outputs found
Iniciativa Colombiana de Polinizadores. Abejas ICPA
No full text"En todo el mundo existe un gran movimiento dirigido hacia la protección de los polinizadores y sus interacciones, generado en la década de los 70, después de que se diera la alarma sobre la disminución de Apis mellifera en el hemisferio norte, causada principalmente por la acción del ácaro Varroa destructor. La ONU decidió establecer la Convención de Diversidad Biológica (CDB) con el propósito fundamental de profundizar en el conocimiento sobre los polinizadores. A partir de este momento se realizaron reuniones en diferentes lugares, donde participaron diversos países, principalmente Brasil, lo cual condujo a crear la Iniciativa Internacional de Polinizadores (IIP) en el año 2000.
Hoy existen distintas iniciativas en todos los continentes, con programas apoyados por sus respectivos gobiernos y con el objetivo principal de evaluar el estado de los polinizadores nativos, de sus interacciones con plantas y también determinar el valor de los servicios ecosistémicos prestados por las abejas y sobre todo el grado de dependencia del hombre por estos servicios. En Colombia la Política Nacional para la Gestión Integral de la Biodiversidad y los Servicios Ecosistémicos, Ministerio de Ambiente y Desarrollo Sostenible (PNGIBSE) en el 2012 menciona la importancia de proteger la biodiversidad y los ecosistemas en general y, dentro de los ejes temáticos del marco estratégico, se vislumbra una ventana abierta para presentar propuestas concretas sobre la protección de los polinizadores y sus interacciones con la vegetación.""Prólogo
Introducción
Agradecimientos
Sección I: Marco Conceptual
Capítulo 1
Polinización y biodiversidad
Marisol Amaya-Márquez
Capítulo 2
El servicio ecosistémico de polinización prestado por las abejas
María Argenis Bonilla Gómez
Capítulo 3
Polinizadores y polinización como servicio ecosistémico en las políticas de conservación y uso sostenible de la biodiversidad
Brigitte Baptiste, Rodrigo Moreno, Ricardo Claro
Capítulo 4
Iniciativas internacionales de polinizadores
Guiomar Nates-Parra
Capítulo 5
Iniciativa colombiana de polinizadores con énfasis en abejas
Guiomar Nates-Parra, Ángela Rodríguez, Fermín Chamorro, Paula Montoya, Nedy Ramírez, Diana Obregón
Sección II: Estado del conocimiento sobre polinizadores abejas y polinización en Colombia
Capítulo 6
Apis mellifera como polinizador de cultivos en Colombia
Paula Montoya, Daniela León, Fermín Chamorro, Guiomar Nates-Parra
Capítulo 7
Abejas sin aguijón (TRIBU MELIPONINI)
Guiomar Nates Parra, Juan Manuel Rosso Londoño
Capítulo 8
Bombus: los abejorros del páramo
Mario Simón Pinilla-Gallego, Rodulfo Ospina Torres, José Ricardo Cure
Capítulo 9
Abejas euglosinas (HYMENOPTERA: APIDAE: EUGLOSSINI) y su importancia como polinizadoras de amplio rango en ecosistemas naturales
Alejandro Parra -H, J. Tupac Otero, Juan C. Sandino, Rodulfo Ospina Torres
Capítulo 10
Abejas solitarias
Laura Victoria Calderón, Mario Simón Pinilla-Gallego, Guiomar Nates-Parra
Capítulo 11
Abejas del maracuyá: género Xylocopa latreille, 1802
Ángela Rodríguez-Calderón
Sección III: Las abejas en riesgo: causas y prácticas amigables
Capítulo 12
La desaparición de las abejas
Rodulfo Ospina Torres; Guiomar Nates-Parra
Capítulo 13
Uso de nidos trampa
Guiomar Nates-Parra
Capítulo 14
Abejas urbanas
Guiomar Nates-Parra
Capítulo 15
Las colecciones entomológicas y las iniciativas de polinizadores
Guiomar Nates-Parra
Sección IV: estudios de caso
Capítulo 16
Las abejas sin aguijón (APIDAE : MELIPONINI) visitantes florales de palmas (ARECACEAE ) en Colombia y su papel en la polinización
Luis Alberto Núñez, Javier Carreño
Capítulo 17
Polinización en cultivos promisorios
Guiomar Nates-Parra, Rodulfo Ospina, Ángela Rodríguez, Fermín J. Chamorro, María Mónica Henao-Cárdenas, Laura V. Calderón, Mario Simón Pinilla-Gallego
Capítulo 18
Polinización de algunas pasifloras en Colombia
Rodulfo Ospina T., Joanna Jaramillo, Ángela Rodríguez, María Mónica Henao
Capítulo 19
La apicultura como alternativa de uso no maderable de los bosques andinos con roble en la cordillera oriental de colombina
Fermín Chamorro G.
Consideraciones finales
Anexos
Anexo I
Lista de interacciones florales: plantas y abejas nativas de Colombia
Anexo II
Lista temática de referencias sobre abejas silvestres en Colombia
Metavermilia nates Zibrowius 1971
No full textMetavermilia nates Zibrowius, 1971 (Fig. 13 C, D) Mevermilia (sic!) nates Zibrowius, 1971: 1380 –1381, fig. 4 [Europa Island, Mozambique Channel, Tanzania Coast].? Vermiliopsis multicristata. — Monro 1937: 319 [Tanzania; fide Zibrowius 1971: 1380]. Metavermilia nates. — Imajima 1979: 171 –173, fig. 5 [Southern tip of Honshu, Japan]; Imajima & ten Hove 1984: 54 [Ponape Island]; ten Hove & Kupriyanova 2009: 63 [name only]. Material examined. AM W. 47588, stn.G 239, Reef crest to south of Bird Islet, coll. G. Rouse & E. Kupriyanova, 31 Oct 2005; AM W. 47589, stn.G 242, east lagoon near Bird Islet, 1 Nov 2005 (1, branchia with operculum); SAM stn.G 246, off Granite Bluff, coll. G. Rouse & E. Kupriyanova, 3 Nov 2005; ZMA V.Pol. 4694, stn. 19, Turtle Beach, intertidal boulders & cobbles in coarse sand, coll. H. ten Hove, 5 Mar 1986. Diagnosis. Operculum complex, consisting of basal ampulla, often with mid-dorsal groove, distal part composed of 4–10 parallel tiers with dorsal indent and terminating with flat disk; tube with 5–9 longitudinal teethed keels (Fig. 13). Remarks. Zibrowius (1971) also mentioned enlarged tips of branchial radioles in M. nates as a specific character. Distribution. Europa Island, Tanzania; Red Sea; Ponape Island; Honshu, Japan. New record for Australia.Published as part of Kupriyanova, Elena K., Sun, Yanan, Ten Hove, Harry A., Wong, Eunice & Rouse, Greg W., 2015, Serpulidae (Annelida) of Lizard Island, Great Barrier Reef, Australia, pp. 275-353 in Zootaxa 4019 (1) on page 300, DOI: 10.11646/zootaxa.4019.1.13, http://zenodo.org/record/28949
Broughton Tower in Lancashire
No full text'Broughton Tower in Lancashire, the Seat of John Gilpin Sawrey Esqr. C. Nates, del: W. Watts, Sculp. Publish'd as the Act directs Jany. 1st 1786 by W. Watts, Chelsea.' Accompanied by notes
Linguistic validation of health-related quality of life instrument for children and adolescents (kidscreen52 proxy versions) in the colombian population
No full textIntroducción: Dentro de las medidas de resultado de la salud se encuentran los cuestionarios de salud percibida, dirigidos a población de niños y jóvenes, que permiten valorar las percepciones desde los mismos sujetos y sus padres, acudientes o proxy. Es el caso del Health-related quality of life for instrument children and adolescents K I D S C R E E N52 versión proxy. Objetivo: Validar lingüÍsticamente el instrumento KIDSCREEN-52 proxy en padres con niños y adolescentes escolarizados de Colombia. MetodologÍa: Se utilizó la metodologÍa de traducción directa e inversa, constó de tres etapas: a) acuerdo del grupo investigador con autores originales del test; b) traducción directa con la participación de dos personas licenciadas en idiomas; c) entrevistas grupales a 72 padres o acudientes de niños(as) y adolescentes escolarizados de 8 a 18 años, de instituciones educativas públicas y privadas de dos ciudades colombianas de los seis estratos socioeconómicos. Resultados: Se incluyeron cambios sintácticos en la introducción del cuestionario, cambios semánticos en preguntas sociodemográficas y antropométricas. Respecto al grado de dificultad en la comprensión del Ítem, valorada por los padres o acudientes (siendo 1 sin dificultad, y 5 mayor dificultad en la comprensión), se identificó que; en general, el promedio valorado con 1 de dificultad en la comprensión fue de 96.05%, ningún Ítem fue valorado con el máximo de grado de dificultad. Discusión: La dimensión que presentó mayor grado de dificultad correspondió a los Ítems de la dimensión de recursos económicos en especial en los niños más pequeños; estas situaciones refieren los padres, se debe a que usualmente no manejan dinero, aspectos identificados en las observaciones de los pares o acudientes durante las entrevistas cognoscitivas. Conclusiones: la combinación de las estrategias de traductores y entrevistas permite proponer una versión de padres adecuada al contexto colombiano para ser usada en el estudio de validación métrica. [Fajardo-Nates S, Argüello-Duarte JF, Piratoba-Hernández B, Richart-MartÍnez M, Cabrero-GarcÍa J, Jaimes-Valencia ML. Validación lingüÍstica del instrumento Health-Related Quality Of Life Instrument for Children and Adolescents (kidscreen52 version proxy) en población colombiana. MedUNAB 2016; 18(3): 182-192]Introduction: Among the health outcomes measures are the questionnaires of perceived health aimed at children and young people that allow assessing perceptions from the same subjects and their parents, guardians or proxy. It is the case of the Health-related quality of life for instrument children and adolescents KIDSCREEN52 proxy version. Objective: To validate, linguistically, the proxy KIDSCREEN-52 instrument in parents with school children and adolescents from Colombia. Methodology: The direct and inverse translation method was used which consisted of three stages: a) agreement with the research group and the original authors of the test b) direct translation with the participation of two people with a degree in languages, c) group interviews to 72 parents or guardians of school children and adolescents from 8 to 18 years of public and private educational institutions from two Colombian cities and, from the six socioeconomic strata. Outcomes: Syntactical changes were included in the introduction of the questionnaire, semantic changes in the demographic and anthropometric questions. Regarding the degree of difficulty in understanding the item valued by parents or guardians (being 1 without difficulty, and 5 with more difficulty in understanding), it was identified that, in general, the average valued with 1 of difficulty in understanding was 96.05%, no item was valued with the maximum degree of difficulty. The dimension that had the highest degree of difficulty, corresponded to the items of the financial resources scale, particularly in younger children; this aspect refers to parents that usually do not administer money, issues identified in the observations of peers or guardians during cognitive interviews. Conclusions: The combination of translation strategies and interviews allows proposing a version of parents suited to the Colombian context to be used in a study of metric validation. [Fajardo-Nates S, Argüello-Duarte, JF, Piratoba-Hernández B, Miguel Richart-MartÍnez M, Cabrero-GarcÍa J, Jaimes-Valencia ML. Linguistic Validation of Health-Related Quality Of Life Instrument for Children and Adolescents (kidscreen52 proxy versions) in the Colombian population. MedUNAB 2016; 18(3): 182-192]
Going Beyond Counting First Authors in Author Co-citation Analysis
No full textThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Crónica del Colegio
No full textSobre la derrota y el vencimiento parcial en las diferentes formas de deporte. Sobre la sociedad literaria que desea cultivar las letras de diferentes maneras y el centro Fisicoquímico. Acreditación de doctor en jurisprudencia para don Régulo Nates Cortés. Sobre la sede de la Quinta Mutis. Sobre lo que evoca el Claustro
Mitomycin C in highly myopic eyes - Author reply
No full textOphthalmology. 2005 Feb;112(2):208-18; discussion 219.
Mitomycin C modulation of corneal wound healing after photorefractive keratectomy in highly myopic eyes.
Gambato C, Ghirlando A, Moretto E, Busato F, Midena E.
SourceRefractive Surgery Service and Antimetabolite Therapy Research Unit, Department of Ophthalmology, University of Padova, Padova, Italy.
Abstract
PURPOSE: To evaluate the role of topical mitomycin C in corneal wound healing (CWH) after photorefractive keratectomy (PRK) in highly myopic eyes.
DESIGN: Prospective, double-masked, randomized clinical trial.
PARTICIPANTS: Seventy-two eyes of 36 patients affected by high (>7 diopters) myopia.
METHODS: In each patient, one eye was randomly assigned to PRK with intraoperative topical 0.02% mitomycin C application, and the fellow eye was treated with a placebo. Postoperatively, mitomycin C-treated eyes received artificial tears (3 times daily, tapered in 3 months), whereas the fellow eye was treated with fluorometholone sodium 2% and artificial tears (3 times daily, tapered in 3 months).
MAIN OUTCOME MEASURES: Uncorrected visual acuity (UCVA) and best-corrected visual acuity (BCVA), contrast sensitivity, manifest refraction, and biomicroscopy. Contrast sensitivity was determined using the Pelli-Robson chart. Corneal confocal microscopy documented CWH.
RESULTS: Mean follow-up was 18 months (range, 12-36). No side effects or toxic effects were documented. At 12-month follow-up examination, UCVAs (logarithm of the minimum angle of resolution) were 0.4+/-0.48 and 0.5+/-0.53 (P = .03) in mitomycin C-treated eyes and corticosteroid-treated eyes, respectively. At 1 year, corneal haze developed in 20% of corticosteroid-treated eyes, versus 0% of mitomycin C-treated eyes. At 12, 24, and 36 months, corneal confocal microscopy showed activated keratocytes and extracellular matrix significantly more evident in untreated eyes (Ps = 0.004, 0.024, and 0.046, respectively).
CONCLUSION: Topical intraoperative application of 0.02% mitomycin C can reduce haze formation in highly myopic eyes undergoing PRK.
Comment in
Ophthalmology. 2006 Feb;113(2):357; author reply 357-8
Dispelling the Myths Behind First-author Citation Counts
No full textWe conducted a full-scale evaluative citation analysis study of scholars in the XML research field to explore just how different from each other author rankings resulting from different citation counting methods actually are, and to demonstrate the capability of emerging data and tools on the Web in supporting more realistic citation counting methods. Our results contest some common arguments for the continued
use of first-author citation counts in the evaluation of scholars, such as high correlations between author rankings by first-author citation counts and other citation
counting methods, and high costs of using more realistic citation counting methods that are not well-supported by the ISI databases. It is argued that increasingly available digital full text research papers make it possible for citation analysis studies to go beyond what the ISI databases have directly supported and to employ more
sophisticated methods
A Multi-Language Comparison of Influences on Author Verification using Character N-Grams
No full textWe create a new multi-language corpus for author verification based on Wikipedia talkpages, and evaluate the influence that differences in topic and time have on character n-gram author profiles. Topic alignment between two texts is found to increase author verification precision, and an authors writing style is found to change over time, but not more significantly after 3 years than after 1 year.Information ArchitectureWISElectrical Engineering, Mathematics and Computer Scienc
A 0.12mm<sup>2</sup> Wien-Bridge Temperature Sensor with 0.1°C (3σ) Inaccuracy from -40°C to 180°C
No full text Resistor-based temperature sensors can achieve much higher resolution and energy efficiency than conventional BJT-based sensors [1], but they typically occupy more area (> 0.25 mm 2 ) and have lower operating temperatures (le 125 {circ} {C}) [2]-[4]. This work describes a 0.12mm 2 resistor-based sensor that uses a Wien-bridge (WB) filter to achieve 0.1 {circ} {C} (3 sigma) inaccuracy from - 40 {circ} {C} to 180 {circ} {C}. Compared to a state-of-the-art WB sensor [4], it occupies 6 × less area and achieves comparable relative accuracy over a 76% wider operating range. Session 10.3 Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public.Electronic InstrumentationMicroelectronic
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