Flavivirus caused infections are among the diseases with the highest incidence in the world. Most of these infections have a wide severity clinical profile, from unspecific fever to lethal hemorrhages and encephalitis. The reason of the clinical variability remains unclear, but it appears to be associated to host genetic features. Susceptible or resistant mouse strains to...
The aim of the present study was to explore the etiology of mortal ulcerations in “capitán de la sabana”. Fishes were captured from Fúquene Lake, Cundinamarca department, Colombia (05°28’N 73°44’W) and stocked in 100 L glass tanks in captivity. Ten fishes with skin ulcers were kept in an independent tank and changes in morphology, bacterial flora and organization of tissues were...
R. melanosterna, R. diademata and their hybrids (R. melanosterna x R. diademata) present annual continuous egglaying cycles with maximum frequency during the rainy season. The period of maximal annual egglaying for hybrid R. melanosterna x R. diademata is earlier than its parents. Aparently there is not direct relation between the ad libitum food offer and Rhinoclemmys sp...
In four mountain aquatic ecosystems of altiplano Cundiboyacense, Colombia, we compared through analysis regression data set of chlorophyll-a obtained with spectorophotometric (tricromatic formula) and fluorometric (Welschmeyer) methods. The analysis showed that the spectrophotometric method overestimated the chlorophyll-a concentration, but it could be used with precaution in the...
A toxigenic raw extract of A. hydrophila was obtained from diverse culture medium (BHI with extract of yeast, (TSB) y minimum salt medium (MSM)) and diverse concentration techniques. Extracts were processed by Sephadex A-50 (QAE) and SDS-PAGE electrophoresis. Biological activity was measured in vitro (hemolytic and proteolitic activity) and in vivo (toxicity in fish). The results...
We evaluate the relation between some symptoms of deterioration and the activity of enzymes entailed with both the browning and the antioxiding system in fruits of yellow pitaya (Acanthocereus pitajaya), harvested in its physiological maturity and stored for 15 days at 24°C and 85% of relative humidity. In the whole fruits, the respiratory intensity and the external colors were...
A review of Crassulacean acid metabolism is presented, characterized by showing the occurrence, activity and plasticity of these complex mechanism at the physiological, biochemical and molecular level, framed by the presence of the denominated four phases in CAM and its repercussion and expression due to different stresses in an ecological context. The basic enzymes, and...
We evaluated the changes on the dynamics of polyphenoloxidase (PFO) and beta-1,3-glucanase (Glu) enzymes in carnation steems, which had been previously inoculated with the pathogen Fusarium oxysporum f. sp. dianthi race 2 (Fod). We established the experimental conditions in order to obtain the extract of the enzymes from the carnation steems with the aim to evaluate their...
It was observed that 96% of the annual egglaying occurs betwen November to March with maximum frecuencies on December (34%) and January (23%) -dry season. There is no association (Pearson correlation) between percentage (%) of egglaying average/month vs. rainfall, relative humidity (%) or temperature (p = -0.23; p = -0.08; p = 0.02 respectively) but it is positive in relation to...