Africa Islas Robles

Es un grupo creado para llevar cultura científica, fomentar en los niños y jóvenes el saber observar, preguntar y pensar, que la comunidad sepa que la ciencia es accesible.

La capacidad de las bacterias para sintetizar enzimas extra celulares nos brinda una gran herramienta biotecnológica debido a que el aislamiento de microorganismos con esta capacidad y la purificación de estas enzimas podrían generar insumos para la posterior creación de productos biotecnologicos novedosos y de alto impacto.

Los micro RNAs son RNAs cortos (20-22 nt) reguladores negativos de la expresión de genes. En este trabajo se estableció la primera estrategia para identificar miRNAs del gametofito femenino de A. thaliana basada en una búsqueda no convencional a partir de firmas MPSS de regiones interétnicas. Se determinó la ubicación de la expresión de 5 precursores de miRNAs por hibridación in situ. Se comprobó la expresión en carpelos de un nuevo microRNA no reportado esto por medio de northern blot.

Changes in ecosystems can be quantified in situ through the populations composing them. Since in natural settings abiotic and biotic elements are variables that can not be controlled, assumptions are made to associate the observed dynamics to specific causes. Detailed long-term studies are still missing. The Churince pond in the Cuatrocienegas basin, is an intriguing microbial ecosystem. Bacterial populations here appear never to reach a stationary dynamics, given that the biotic and abiotic… Mostrar más

Changes in ecosystems can be quantified in situ through the populations composing them. Since in natural settings abiotic and biotic elements are variables that can not be controlled, assumptions are made to associate the observed dynamics to specific causes. Detailed long-term studies are still missing. The Churince pond in the Cuatrocienegas basin, is an intriguing microbial ecosystem. Bacterial populations here appear never to reach a stationary dynamics, given that the biotic and abiotic elements are highly susceptible to disturbances but strong enough to have thriven for millions of years. To analyze the community dynamics of sediments, we created microenvironments from 3 sites in the Churince system. Triplicates per site were made with separate sediments per site and with sediment mixing. These were incubated with constant temperature, photoperiod, and water level. Samples were taken at different time points during two years (14 samples), increasing the for sampling time continuously and mixing the content each time. The bacterial biodiversity of each sample was measured by following the diversity of Bacillus spp. colonies. The Bacillus spp. that can exist either in a vegetative state or as spores, and are easily cultured on Marine Medium. We plated dilutions of the samples on Marine Medium either directly or after heat treatment (to select spore formers). Mostrar menos