ABSTRACT The aim of this study was to evaluate the productive performance and carcass characteristics in Creole hair sheep (OPC) and F1 Dorper x OPC crosses in Córdoba, Colombia. Twenty-five lambs (14 F1 Dorper x OPC and 11 OPC) were used (9 males and 16 females), managed in a semi-stall system and supplemented with a mixture of cottonseed and ground corn. The lambs were slaughtered at approximately 6.5 months of age. The effect of sex, type of parturition (single, twins) and breed type was determined. Within the productive performance, only a significant difference was found in the pre-weaning weight gain (p<0.05) due to sex and breed type. Carcass characteristics were significant for the breed type effect, rump width/leg length ratio, leg and rump girth, rump, hip and leg width, loin eye area, and width and depth of the back. It is concluded that the F1 animals presented better performance than the OPC for growth and carcass characteristics.

RESUMEN El estudio tuvo como objetivo evaluar el comportamiento productivo y las características de la canal en ovinos de pelo criollo (OPC) y los cruces F1 Dorper x OPC en Córdoba, Colombia. Se utilizaron 25 corderos (14 F1 Dorper x OPC y 11 OPC), siendo 9 machos y 16 hembras, manejados en un sistema de semi estabulación y suplementados con una mezcla de semilla de algodón y maíz molido. Los corderos fueron faenados los 6.5 meses de edad aproximadamente. Se determinó el efecto del sexo, tipo de parto (simple, mellicero) y tipo racial. Dentro del comportamiento productivo, solo se encontró diferencia significativa en la ganancia de peso predestete (p<0.05) para el sexo y tipo racial. Las características de la canal fueron significativas para el efecto tipo racial, la relación ancho grupa/longitud pierna, perímetro de la pierna y de la grupa, ancho de la grupa, de la cadera y de la pierna, área del ojo del lomo, y ancho y profundidad del lomo. Se concluye que los animales F1 presentaron mejor desempeño que los OPC para las características de crecimiento y de la canal.

Resumen Introducción/objetivo: Los estudios realizados en algunos países, incluyendo a Colombia, indican altas prevalencias de ciberviolencia en el noviazgo. Sin embargo, en dicho país no se cuenta con instrumentos validados para medir esta forma de violencia. El objetivo de este estudio fue evaluar la confiabilidad y la validez de la Escala de Abuso Online en Relaciones de Noviazgo. Método: Participaron 2023 estudiantes de colegio y universitarios (53% mujeres), entre 13 y 40 años. Resultados: El análisis factorial exploratorio demostró la conveniencia de conservar la estructura original de 20 ítems de las dos escalas del instrumento (perpetración y victimización) y las dos subescalas de cada una (“agresiones directas” y “monitoreo/control”), estructura que fue ratificada por el análisis factorial confirmatorio con índices adecuados de ajuste. Además, las cuatro subescalas correlacionaron significativamente entre sí y con las escalas de la Lista de Chequeo de Experiencias de Maltrato Psicológico en la Pareja. Los índices alfa oscilaron entre .75 y .87. Conclusiones: Estos resultados indican que el instrumento presenta unas propiedades psicométricas que avalan su uso con adolescentes y adultos jóvenes colombianos.

Abstract Introduction/objective: Studies carried out in some countries, including Colombia, indicate high prevalences of cyber dating abuse. However, in that country there are no validated instruments to measure this form of violence. The objective of this study was to evaluate the reliability and validity of the Cyber Dating Abuse Questionnaire. Method: The participants were 2023 college and university students (53% female), 13-40 years aged. Results: The exploratory factor analysis showed the convenience of preserving the original structure of 20 items on the two scales of the instrument (perpetration and victimization) and the two subscales of each (“direct aggression” and “monitoring/control”). This structure was ratified by confirmatory factor analysis with adequate adjustment indices. In addition, the four subscales correlated significantly with each other and with the scales of the Checklist of Experiences of Psychological Abuse in the Couple. Alpha indices ranged from .75 to .87. Conclusions: These results indicate that the instrument has psychometric properties that ensure its use with Colombian adolescents and young adults.

Resumen En este artículo se presentan los resultados de setenta y dos ensayos de columna resonante desarrollados en dos tipos de materiales provenientes de los depósitos de estériles de las minas de Riotinto (Huelva-España). La metodología de ensayo incorporó diferentes condiciones de presión efectiva de consolidación y nivel de excitación torsional. El equipo utilizado para la ejecución de las pruebas fue una columna resonante de base fija y extremo superior libre. Las presiones efectivas de consolidación se establecieron dentro de un rango variable entre 50 - 300 kPa y las excitaciones torsionales fueron iguales a 0.025, 0.05, 0.1, 0.2, 0.4 y 0.8 V. Se encontró que dichas combinaciones de ensayo conducen a deformaciones angulares que varían entre 0.003% y 0.148%. Los resultados indican que es posible establecer funciones empíricas sencillas del módulo de rigidez como una función de la deformación angular y de la presión efectiva de consolidación.

Abstract This article presents the results of seventy-two resonant column tests performed in two types of materials from the waste deposits of the Riotinto mines (Huelva - Spain). Methodology test included different conditions of effective consolidation pressure and torsional excitation level. The equipment used was a fixed-free resonant-column system. The effective consolidation pressures were established within a range between 50 - 300 kPa and the torsional excitations were equal to 0.025, 0.05, 0.1, 0.2, 0.4 and 0.8 V. It was found that such test combinations lead to angular deformations between 0.003% and 0.148%. The results indicate that it is possible to establish simple empirical functions of the stiffness module as a function of the angular deformation and the effective consolidation pressure.

Adherence to antiretroviral therapy is key contributor to decreasesing morbidity and mortality from HIV/ AIDS infection. However, it is affected by treatment-related factors including the multiple adverse reactions and interactions arising from chronic polypharmacy. In order to determine drug-related problems, 66 outpatients from Hospital Carlos Van Buren on antiretroviral therapy were monitored. 100 % had medication-related problems and 46.1% of those problems were related to the safety of the therapy. Hypertriglyceridemia associated to the combined use of both nucleoside reverse transcriptase inhibitor and a non-nucleoside reverse transcriptase inhibitor was the most frequent adverse reaction. Results show that pharmacological monitoring of patients on antiretroviral treatment is necessary for the early identification of drug-related problems and for the proposal of alternatives that promote therapeutic safety and efficacy.

La adherencia al tratamiento anti-retroviral es un pilar fundamental en la reducción de la morbi-mortalidad de la infección por VIH/SIDA. Sin embargo, se ve dificultada por ser un tratamiento que involucra numerosos medicamentos administrados de forma crónica, con posibilidad de presentar reacciones adversas y/o interacciones. Se realizó un seguimiento farmacoterapéutico a 66 pacientes ambulatorios con tratamiento anti-retroviral del Hospital Carlos Van Buren. El 100% de los pacientes presentó problemas relacionados con medicamentos, afectando en 46,1% a la seguridad de la terapia. La reacción adversa más frecuente fue hipertrigliceridemia, principalmente asociada al uso de dos inhibidores nucleosídico de la transcriptasa reversa con un inhibidor no nucleosídico de la transcriptasa reversa. Los resultados permiten concluir que la monitorización farmacológica de pacientes con tratamiento anti-retroviral identifica en forma precoz los problemas relacionados con medicamentos, favoreciendo la seguridad y eficacia de la terapia propuesta.

Tem-se estudado a diversidade e a riqueza de larvas de Anopheles (Nyssorhynchus) spp. em 22 postos permanentes e temporais em área de 70 km² ao pé da Cordilheira Andina Oriental da Venezuela, em região de malária refratária. Foram identificadas 12 espécies, sendo as mais freqüentes, abundantes e simpátricas as A. triannulatus, A. albitarsis, A. nuñeztovari, A. oswaldoi y A. strodei. Foi maior o número de espécies e de larvas por amostra nos postos permanentes do que nos temporais. A existência das mesmas associações larvais, em postos de outras localidades, ao pé da Cordilheira Andina Oriental da Venezuela, baseia-se no ponto de vista de que é possível fazer-se um mapa ecológico dos criadouros dessas espécies de Anopheles em região de 430 km de extensão.

Studies have been un dertaken into on the diversity and relative abundance of larvae of Anopheles (Nyssorhynchus) spp. in 22 permanent or temporary pools in an area of 70 km² in the eastern piedmont of the Venezuela Andes, between the mountains and the plains, an area in which malaria is refractory and A. nuñeztovari is present. Twelve species were identified, the most frequent, abundant and sympatric being A. triannulatus, A. albitarsis, A. nuñeztovari, A. oswaldoi and A. strodei. The samples from the permanent pools showed greater diversity of species and greater numbers of larvae than the samples from the temporary pools. The existence of the same larval associations in pools of other localities in the eastern piedmont of the Venezuelan Andes suggests the possibility of the making an ecological map of the breeding sites of A. nuñeztovari and for these anophelines in a region extending for 430 km.

Tem-se estudado a diversidade e a riqueza de larvas de Anopheles (Nyssorhynchus) spp. em 22 postos permanentes e temporais em área de 70 km² ao pé da Cordilheira Andina Oriental da Venezuela, em região de malária refratária. Foram identificadas 12 espécies, sendo as mais freqüentes, abundantes e simpátricas as A. triannulatus, A. albitarsis, A. nuñeztovari, A. oswaldoi y A. strodei. Foi maior o número de espécies e de larvas por amostra nos postos permanentes do que nos temporais. A existência das mesmas associações larvais, em postos de outras localidades, ao pé da Cordilheira Andina Oriental da Venezuela, baseia-se no ponto de vista de que é possível fazer-se um mapa ecológico dos criadouros dessas espécies de Anopheles em região de 430 km de extensão.

Studies have been un dertaken into on the diversity and relative abundance of larvae of Anopheles (Nyssorhynchus) spp. in 22 permanent or temporary pools in an area of 70 km² in the eastern piedmont of the Venezuela Andes, between the mountains and the plains, an area in which malaria is refractory and A. nuñeztovari is present. Twelve species were identified, the most frequent, abundant and sympatric being A. triannulatus, A. albitarsis, A. nuñeztovari, A. oswaldoi and A. strodei. The samples from the permanent pools showed greater diversity of species and greater numbers of larvae than the samples from the temporary pools. The existence of the same larval associations in pools of other localities in the eastern piedmont of the Venezuelan Andes suggests the possibility of the making an ecological map of the breeding sites of A. nuñeztovari and for these anophelines in a region extending for 430 km.