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Santa Rosa del Sur, Colombia

Narvaez V J.F.,University of Antioquia | Jimenez C C.,Lasallista University Corporation
Vitae | Year: 2012

Pharmaceuticals and personal care products have become an environmental problem in recent years. Their physicochemical properties and persistence in the environment have allowed the distribution of degradates and parent compounds in water, soil, air and food. The widespread use of pharmaceuticals and personal care products in hospitals, domestic residences, agricultural and industrial facilities has increased their discharge into the water bodies, and its toxicity has started to manifest in different biological components of ecosystems. The development of methods for sample treatment and instrumental analysis techniques has enabled the separation, identification and quantification of active ingredients and degradates with higher environmental impact, at concentrations of parts per billion or even parts per trillion. In addition, in vitro and in vivo assays have demonstrated their ecotoxicity in water, driving them to the classification of emerging organic pollutants, whose waste is indeterminate. Although their adverse effects are still unknown, they could have strong implications for global public health. This review presents the dynamics and the development of research over the past ten years about the presence of non-steroidal anti-inflammatory analgesics, antihypertensives, antibiotics and other drugs in water bodies. Similarly, it described the impact of pharmaceutical activity, hospital services and domestic effluents on water quality. Source


Ruales C.A.D.,Lasallista University Corporation | Torres W.V.,University of the Plains
Revista Colombiana de Ciencias Pecuarias | Year: 2014

Background: ammonia (NH3) is the main excretion product from protein catabolism in fish, eliminated primarily through the gills. The proportion excreted by each species depends on factors such as protein quality, energy level and diet balance, body size of the animals, and environmental factors such as water temperature and pH. Objective: to determine the effect of dietary protein level (D1 = 250 g/kg, D2 = 300 g/kg, D3 = 350 g/kg) and body weight (P1 = 45 g, P2 = 250 g, P3 = 520 g) on ammonia excretion (AE) in white cachama (Piaractus brachypomus). Methods: basal AE level was determined by measuring water ammonia concentration every 2 h for 26 h after a 48 h fasting period. The AE in response to CP levels was determined for each fish size by measuring ammonia every 2 h for 26 h, after feeding them to satiety with the experimental diets. Results: basal AE was 177.2, 128.7, and 79.2 mg N-NH4+/day/kg live weight (LW) for P1, P2, and P3, respectively. The differences between treatments were significant (p<0.05). The AE rate, depending on protein level and body weight, was significantly different for all comparisons (p<0.05), similar to the comparison of main effects. Conclusion: the lightest fish and the highest protein content intake increased ammonium excretion. Source


Agudelo-Gomez D.,Lasallista University Corporation | Agudelo-Gomez D.,University of Antioquia | Pineda-Sierra S.,University of Antioquia | Ceron-Munoz M.F.,University of Antioquia
PLoS ONE | Year: 2015

Genealogy and productive information of 48621 dual-purpose buffaloes born in Colombia between years 1996 and 2014 was used. The following traits were assessed using one-trait models: milk yield at 270 days (MY270), age at first calving (AFC), weaning weight (WW), and weights at the following ages: first year (W12), 18 months (W18), and 2 years (W24). Direct additive genetic and residual random effects were included in all the traits. Maternal permanent environmental and maternal additive genetic effects were included for WW and W12. The fixed effects were: contemporary group (for all traits), sex (for WW, W12, W18, and W24), parity (for WW, W12, and MY270). Age was included as covariate for WW, W12, W18 and W24. Principal component analysis (PCA) was conducted using the genetic values of 133 breeding males whose breeding-value reliability was higher than 50% for all the traits in order to define the number of principal components (PC) which would explain most of the variation. The highest heritabilities were for W18 and MY270, and the lowest for AFC; with 0.53, 0.23, and 0.17, respectively. The first three PCs represented 66% of the total variance. Correlation of the first PC with meat production traits was higher than 0.73, and it was -0.38 with AFC. Correlations of the second PC with maternal genetic component traits for WW and W12 were above 0.75. The third PC had 0.84 correlation with MY270. PCA is an alternative approach for analyzing traits in dual-purpose buffaloes and reduces the dimension of the traits. © 2015 Agudelo-Gómez et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Source


Objective. Quantifying phenotypic malformations and make a curve control and development of the breed Poodle puppies in the city of Medellin. Materials and methods. We analyzed 60 individuals, 30 females and 30 males were measured and weighed from 2 to 12 months of age with these data, build a table and a control growth curve and after about 12 months of age there were the Phenotypic malformations, which are considered by the American Kennel Club (AKC) and Cynological International (FCI). Results. Of the specimens analyzed, 10% had bone spurs, cryptorchidism 20%, 5% had polidoncia a year old, with teeth retained teeth more often. Conclusions. In an effort to find examples of smaller faults have been committed at the time of mating, resulting in increased phenotypic malformations found in the study, this work also provide veterinarians, another tool for assessing pediatric puppies Poodle race in the city of Medellin. Source


Villa J.A.,Ohio State University | Villa J.A.,Florida Gulf Coast University | Villa J.A.,Lasallista University Corporation | Mitsch W.J.,Ohio State University | And 3 more authors.
Ecological Engineering | Year: 2014

Carbon stable isotopes were used to investigate the contribution of different wetland plant communities commonly found in the Everglades to the dissolved organic carbon (DOC) exported from a mesocosm experiment. The species conforming the different treatments in the mesocosms were: Typha domingensis Pers, Cladium jamaicense Crantz, Nymphaea sp., Nymphaea sp./. Eleocharis sp., Najas guadalupensis [Spreng] Magnus/. Chara sp. and Najas guadalupensis. Results indicate that Nymphaea sp./. Eleocharis sp. and Najas guadalupensis/Chara sp. treatments functioned as temporary sinks for DOC, but over the study period all treatments were net sources of DOC. A two-source carbon isotope mixing model was used to estimate the contribution from inflow water and biomass into the outflow DOC in each treatment. DOC from biomass was relatively higher in treatments with emergent and floating vegetation (24-30%) than in treatments containing submerged aquatic vegetation (≤5%). The relevance of these findings for restoration and management in the context of the Everglades region, specifically its implications for organic phosphorus exports, are discussed. © 2014 Elsevier B.V. Source

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