Overweight and obesity in Colombian college students and its association with physical activity [Sobrepeso y obesidad en estudiantes universitarios colombianos y su asociación con la actividad física]
Rangel Caballero L.G.,Santo Tomas University of Colombia
Nutricion Hospitalaria | Year: 2015
Introduction: Overweight, obesity and physical activity are considered modifiable factors related to development of chronic diseases. Taking into account physical activity patterns in college students, it is necessary to establish its association with the excessive weight in order to prevent and to decrease the prevalence of future chronic diseases. Objective: The aim of this study was to determine the association between excessive weight and physical inactivity among college students. Material and methods: An analytical cross sectional study was carried out in 2013 among college students from a private university of Bucaramanga, Colombia. Students (n=306) 18 to 25 years old were included using simple random sampling. An interview was realized using a survey that included the International Physical Activity Questionnaire (IPAQ), together with socio demographic variables. An assessment of body composition was realized in order to measure height, weight, body mass index (BMI), total fat percentage, and waist and hip circumferences. A trained professional in physical activity was in charge of data collection and anthropometric measurements. This study was approved by the university research and ethics committee. Participation was both voluntary and anonymous. All data were analyzed in compliance with the Helsinki Declaration. Written consent was signed by every participant of the study. A descriptive analysis of the studied population’s general characteristics was realized. The association between excessive weight and physical inactivity was estimated using regression logistic models that allows estimate row and adjusted Odds Ratios (OR). Results: An excessive weight was observed in 26.47% of the students, among which 20.26% were overweight and 6.21% obese, according to BMI cutoff. Taking into account the total fat percentage, 12.09% of the students were in risk of becoming obese and 10.13% were already obese. 50.56% of the students practiced very little weekly physical activity. The median of daily sedentary lifestyle was 12 hours, with an interquartile range of 4 hours. A statistically significant association was found between excessive weight and sedentary behavior, according to the total fat method (adjusted OR: 1.11, CI 95%: 1.01-1.23). Conclusions: College students’ health behavior is often inadequate in terms of physical activity and dietary habits. Our study observed an association between physical inactivity and excessive weight. Physical inactivity is an important lifestyle factor related to chronic diseases. Further research should focus on determinants to increase their physical activity and to improve their daily lifestyle in order to lower the risk of future diseases. © 2015, Grupo Aula Medica S.A. All rights reserved.
Fernandes F.H.C.N.,University of Sao Paulo |
Orsi I.A.,University of Sao Paulo |
Villabona C.A.,Santo Tomas University of Colombia
Gerodontology | Year: 2013
Objective: This study evaluated the surface roughness (Ra) and color stability of acrylic resin colors (Lucitone 550, QC-20 and Vipi-Wave) used for fabricating bases for complete, removable dentures, overdentures and prosthetic protocol after immersion in chemical disinfectants (1% sodium hypochlorite and 2% peracetic acid) for 30 and 60 minutes. Material and Methods: Sixty specimens were made of each commercial brand of resin composite, and divided into 2 groups according to the chemical disinfectants. Specimens had undergone the finishing and polishing procedures, the initial color and roughness measurements were taken (t=0), and after this, ten test specimens of each commercial brand of resin composite were immersed in sodium hypochlorite and ten in peracetic acid, for 30 and 60 minutes, with measurements being taken after each immersion period. These data were submitted to statistical analysis. Results: There was evidence of an increase in Ra after 30 minutes immersion in the disinfectants in all the resins, with QC-20 presenting the highest Ra values, and Vipi-Wave the lowest. After 60 minutes immersion in the disinfectants all the resins presented statistically significant color alteration. Conclusions: Disinfection with 1% sodium hypochlorite and peracetic acid altered the properties of roughness and color of the resins. © 2012 The Gerodontology Society and John Wiley & Sons A/S.
Cepeda-Gomez R.,Santo Tomas University of Colombia |
Olgac N.,University of Connecticut
Systems and Control Letters | Year: 2013
An investigation of double-integrator agents with directed asymmetric consensus protocols and multiple rationally independent time delays is presented in this paper from two novel perspectives. First, we complement the group consensus literature on crucial stability analysis, using a recent technique called the Cluster Treatment of Characteristic Roots (CTCR) for the first time on this class of time-delayed systems. The CTCR paradigm is pursued after a block-diagonalization (mode-decoupling) transformation on the system. This treatment produces some unique stability tables for the dynamics in the space of the delays which are non-conservative and exhaustive. Second, a novel concept of spectral delay space is presented, as an overture to the CTCR for the determination of the complete set of stability-crossing (switching) hypersurfaces in the delay space. Examples are provided to display the strengths and efficiency of this new stability analysis mechanism. © 2013 Elsevier B.V. All rights reserved.
Cabarcas J.M.,Santo Tomas University of Colombia |
Duarte J.,National University of Colombia |
Rodriguez J.-A.,National University of Colombia
Advances in High Energy Physics | Year: 2012
There are different models which are based on the gauge symmetry SU(3) c ⊗ SU(3) L ⊗ U (1) x (331), and some of them include exotic particles, and others are constructed without any exotic charges assigned to the fermionic spectrum. Each model build-up on 331 symmetry has its own interesting properties according to the representations of the gauge group used for the fermionic spectrum, that is, the main reason to explore and identify the possible sources of flavor changing neutral currents and lepton flavor violation at tree level. © 2012 J. M. Cabarcas et al.
Puerto Galvis C.E.,Industrial University of Santander |
Vargas Mendez L.Y.,Santo Tomas University of Colombia |
Kouznetsov V.V.,Industrial University of Santander
Chemical Biology and Drug Design | Year: 2013
Chemical and pharmacological information on cantharidin-based small molecules was analyzed. The review summarizes new facts about blister beetles' metabolites for the period 2006-2012. General synthetic approaches to cantharidin-based small molecules as well as their chemical transformations and biological activities related to cantharidin, norcantharidin, cantharidimide, and norcantharimide analogs, especially their inhibitory activity of phosphoprotein phosphatases in cancer treatment, were discussed in this mini review, which could help to design new small molecule modulators for other biological models. Chemical and pharmacological information on cantharidin-based SMs was analyzed. The review summarizes new facts about blister beetles metabolites for the period 2006-2012. General synthetic approaches to cantharidin-based small molecules as well as its chemical transformations and potential biological applications were discussed in this mini review that could help to design new SMs modulators from other biological models. © 2013 John Wiley & Sons A/S.