Descripción: “...Most of them act on the interphases  of fluid and have a bipolar structure  with hydrophilic and hydrophobic portions that allow them to interact with  both  the  cellular sur faces  and  biological membranes in general, causing effects on the surface tension and the molecule mobilization between the extracellular and intracellular environment. ...”

Descripción: “...Abstract:   With the approval of the National Education Ministry of three new master’s programs (sustainable environmental management, sustainable tropical agricultural production and Sustainable Systems of Tropical Animal Health and Production) in addition to the existing expertise in aquaculture, La Universidad de Los Llanos is on its way to face the great changes coming in the region. ...”

Descripción: “...To estimate the coefficients used the indirect method with chromic oxide marker, collecting the faces through the Guelph system changed. Red tilapia (Oreochromis sp.) juvenile selected was selected with an average weight of100 g. ...”

Descripción: “...Generalist species could lead those expansions, whereas specialist species could  face population reductions due to their limited dispersal  abilities. ...”

Descripción: “...During the clinical examination,  the horse showed an increase of the rectal  temperature, mild tachycardia, holosystolic murmur, profuse sweat- ing, digital  pulses on the  front  limbs, intestinal hypermotily, patelar hyporeflexia and decrease of sensivity on neck and  face.  Survey of laboratory showed mild anemia,  lymphocitic and neutrophilic leukocitosis, slight increase on the level of creatine kinase and  blood urea  nitrogen.  ...”

Descripción: “...Furthermore,  it's  of interest  review  the etiology, functional and tumoral transforming dynamics of the mast cells in canine species.Mastocytoma is a primary tumor of the skin, mainly in face areas, neck, thorax, and less common in oral cavity, interdigital spaces  and perineal regions. ...”