Microbiología y Biotecnología

Fermentación alcohólica de melaza mediante levaduras

Principio

Los métodos de producción biotecnológicos desempeñan un papel económico muy significativo en las industrias farmacéutica, química y alimenticia.
El biorreactor de burbujas aquí mostrado representa una alternativa sencilla y ...

Visitamos una planta de aguas residuales

Principle

A visit to a water treatment plant reveals some fascinating procedures and purification methods. We will not merely be concerned with interesting impressions, but instead we will increase our understanding for microbiological processes by measuring the key parameters: ...

Visitamos una planta de aguas residuales

Métodos básicos de visualización de micro y nanoescructuras con el microscopio de fuerza atómica (AFM)

Principio

Aproximando una punta aguda de silicona montada en un voladizo (cantilever) para tomar una muestra de una superficie se produce una interacción a escala  atómica. El resultado es que el voladizo se curva, lo cual se detecta con láser. En modo ...

Descomposición microbiana de aceite mineral

Some microorganisms living in soil and water are capable of utilizing mineral oil compounds as carbon and energy sources. They break down these compounds to produce carbon dioxide and water, thereby decomposing mineral oil. Particularly mycobacteria, corynebacteria and ...

Métodos básicos de trabajo en Microbiología

Principle

In order to prevent nutrient media and cultures from being contaminated with microorganisms that adhere to the working equipment, the equipment, nutrient media, and nutrient solutions must be sterilised. Petri dishes filled with a solidified nutrient medium are called plates in the ...

Evidencia de propagación de microorganismos

Principle

Microorganisms are ubiquitous, i.e. they are present everywhere around us. This fact can be proved by touching the objects that are to be examined in view of the presence of microorganisms against the sterile nutrient medium in a Petri dish and by incubating the plates ...

Determinación del número de bacterias

The microbial count is the number of viable microorganisms in one millilitre or gramme of the material to be examined, e.g. water, soil, milk, ice cream, etc. It is of high practical importance for the analysis of drinking water, soil, and foodstuffs. The
microbial count can only ...

Evidencia del efecto de los antibióticos, agentes quimiote- rapéuticos y desinfectantes

Principle

Evidence concerning the effect of substances inhibiting the growth of microorganisms, e.g. antibiotics, chemotherapeutics, and disinfectants, can be provided by treating cultures with the substances to be studied and by observing the growth of the microorganisms. Evidence concerning ...