ABSTRACT Tomato is considered a fruit with a high food demand across the world due to its high antioxidant capacity. Lycopene content in tomato has been widely studied, particularly in cherry-type tomatoes which are considered a high source of lycopene for humans. The aim of this study was to analyze the differences in terms of concentration and variation of diverse physicochemical parameters of quality (acidity, vitamin C, pH, °Brix, color coordinates L*, a* and b*) and, antioxidants like ?-carotene and lycopene in 11 accessions of cherry-type tomatoes, considering the advantages of antioxidants for human health. Multicriteria analysis and other tests showed substantial differences among the accessions. IAC401 was associated with the best physicochemical characteristics of a promissory cherry-type tomato for cultivation due to its association with functional food, followed by IAC426R and IAC1624. This study allowed an innovative association of physicochemical characteristics and antioxidant contents of cherry-type tomatoes through multicriteria analyses which enable the analysis, elimination, and proposal of promising accessions for their use in future crops which will promote the best intrinsic features of tomato to be used in the studied region. In this case accessions with the highest scores offer not only optimum amounts of antioxidants and highest levels of organic acids and sugars.

The purpose of this research was to collect information about the use of Information and Communication Technologies (ICT) in university teaching, the perception of the teachers about the ICT and the assessment of the technological infrastructure available, from a comparative perspective between public and private universities. For this, a survey was carried out among 147 teachers from institutions of the Eje Cafetero, Colombia. Factor analysis, multiple correspondence analysis and independence tests were used. Marked differences were found between teachers of public and private universities, some differences with respect to gender, but no significant differences were found in relation to other descriptive variables of the teacher such as age, education level or years of teaching experience. But although the results are favorable to the teachers of private institutions, there is also evidence of a higher level of stress associated with the use of technologies among them.

La presente investigación se propuso recoger información sobre el uso de las Tecnologías de la Información y la Comunicación (TIC) en la actividad docente universitaria, la percepción del profesorado sobre las TIC y la valoración de la infraestructura tecnológica disponible, desde una perspectiva comparativa entre universidades públicas y privadas. Para tal propósito se realizó una encuesta entre 147 profesores de instituciones del Eje Cafetero, Colombia. Se recurrió al análisis factorial, el análisis de correspondencias múltiples y pruebas de independencia. Se encontraron marcadas diferencias entre profesores de universidades públicas y privadas. Algunas diferencias con respecto al género, pero no se hallaron diferencias significativas con respecto a otras variables descriptivas del docente como la edad, la escolaridad o los años de experiencia docente. Pero aunque los indicadores favorecen a los docentes de instituciones privadas, también se evidencia un mayor nivel de estrés asociado al uso de las tecnologías entre ellos.

Se compararon los métodos de extracción y destilación simultánea (SDE) y microextracción en fase sólida con espacio de cabeza (HS-SPME), acoplados a cromatografía de gases con detector de espectrometría de masas (GC-MS), para la recuperación de volátiles a partir de pulpa de lulo (Solanum quitoense). Se realizó un diseño completamente al azar aplicado al tipo de solvente para SDE/GC-MS, mientras que para HS-SPME/GC-MS se ejecutó un diseño a dos vías, teniendo como factores el tipo de fibra y la temperatura de adsorción. En el primer caso se obtuvieron principalmente hidrocarburos, aldehídos y ésteres; en el segundo, se recuperaron ésteres y aldehídos. El análisis de varianza mostró una interacción significativa entre el tipo de fibra, la temperatura de adsorción y los grupos funcionales.

Simultaneous Distillation-Solvent Extraction (SDE) and Headspace Solid Phase Micro-extraction (HS-SPME), coupled to Gas Chromatography-Mass Spectrometry (GC-MS), for recovery of volatiles from lulo pulp (Solanum quitoense) were compared. A completely randomized SDE/GC-MS design was applied to establish differences between the areas obtained with different solvents, whereas a two-way HS-SPME/GC-MS indicated the most appropriate extraction conditions of volatiles, having the type of fiber and the adsorption temperature as factors. SDE/GC-MS mainly promoted the extraction of hydrocarbons, aldehydes, and esters; whereas esters and aldehydes had higher areas using HS-SPME/GC-MS. Furthermore, the variance analysis showed a significant interaction among the type of fiber, the adsorption temperature, and the functional groups.

Foram comparados os métodos de extração e destilação simultânea (SDE) e microextração em fase sólida com espaço de cabeça (HS-SPME), acopladas à cromatografia gasosa-espectrometria de massa (GC-MS), para à recuperação de voláteis a partir da polpa de lulo (Solanum quitoense). Foi realizado um delineamento completamente casualizado aplicado ao tipo de solvente para à SDE/GC-MS, enquanto à HS-SPME/GC-MS foi executado um desenho de duas vias, tendo como fatores o tipo de fibra e a temperatura de adsorção. No primeiro caso foram obtidos sobretudo hidrocarbonetos, aldeídos e ésteres; no segundo foram obtidos ésteres e aldeídos. A análise de variância mostrou uma interação significativa entre o tipo de fibra, a temperatura de adsorção e os grupos funcionais.

This paper presents the results of a study aimed to obtain performance indicators in a public transport system, from three approaches, analytical, simulation and urban accessibility. For the study the Air transport Cable type of the city of Manizales in Colombia is taken as a case of study. The theoretical model of open networks of Jackson was applied, from the perspective of discrete simulation. The supply models are addressed through the analysis of urban accessibility, for which the data obtained by the Mobility Plan of the city, using the TransCad and Surfer software. The results show that for performance measures, a low rate of use of the transport system is obtained, which clearly confirms the results obtained by the analysis of urban accessibility.

El presente trabajo presenta los resultados de un estudio orientado a la obtención de indicadores de desempeño en un sistema de transporte público, desde tres enfoques, el analítico, el de simulación y el de accesibilidad urbana. Para ello se toma como caso de estudio el análisis de desempeño del sistema de transporte tipo Cable Aéreo de la ciudad de Manizales en Colombia. Se aplica el modelo teórico de redes abiertas de Jackson, desde la perspectiva de la simulación discreta. Los modelos de oferta se abordan a partir del análisis de accesibilidad urbana, para lo cual se toman los datos obtenidos por el Plan de Movilidad de la ciudad, en el cual se usaron los programas TransCad y Surfer. A partir de las mediciones de desempeño mediante los enfoques analítico y simulado, se obtiene una baja tasa de uso del sistema de transporte, lo cual ratifica claramente los resultados obtenidos por los análisis de accesibilidad urbana.