Biologia

 
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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 ...

 
Detalles

Num.Producto: P4140100

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 ...

 
Detalles

Num.Producto: P4140200

Determinación del número de bacterias

Principle

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 ...

 
Detalles

Num.Producto: P4140400

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 ...

 
Detalles

Num.Producto: P4140500

Principios básicos de la resonancia magnética nuclear (NMR)

Qué se aprende
  • Spin nuclear
  • Núcleos atómicos con momento magnético
  • Precesión de los spines nucleares
  • Magnetización
  • Condición de resonancia, frecuencia MR
  • Angulo de volteo o rotación (flip)  MR
  • Señal FID ...
 
Detalles

Num.Producto: P5942100

Tiempos de relajación en la resonancia magnética nuclear (NM R)

Principle

The principles of relaxation processes using the MR technology are demonstrated. Experiments are executed with the MRT training device giving the opportunity to investigate some small probes in the sample chamber. Device control is done with the provided software. ...

 
Detalles

Num.Producto: P5942200

Codificación espacial en la resonancia magnética nuclear (NM R)

Principle

It should be demonstrated how spatial encoding does work in the MR technology. Experiments are executed with a MRT training device giving the opportunity ton investigate some small probes in the sample chamber. Device control is done with the provided software. Investigations ...

 
Detalles

Num.Producto: P5942300

Formación de imágenes con la resonancia magnética nuclear (N MR)

Qué se aprende
  • Spines nucleares
  • Precesión de spines nucleares
  • Condición de resonancia
  • Frecuencia MR
  • Señal FID (decaimiento de inducción libre)
  • Campos de gradiente magnético
  • Decodificación espacial (codificación de ...
 
Detalles

Num.Producto: P5942400

Resonancia magnética (RM) II



Principle

The aim of these experiments is to show how the spin echo technique can be used to generate 2D MR images of a slice of a well-defined thickness, orientation, and size (Localized Spin Echo 2D). These parameters determine the so-called "field of view" (FOV) of the MR image. ...

 
Detalles

Num.Producto: P5942500

Generación de ondas sonoras

Principle

Sounds are generated by oscillations. The sound volume is influenced by their relative amplitude, while the sound pitch depends on their frequency. This relationship is examined based on three examples: oscillating ruler, tuning fork, string of a ...

 
Detalles

Num.Producto: P6010000

Propagación del sonido en el aire

Principle

This experiment demonstrates, particularly clearly, the propagation of sound waves in air and, thereby, the working principle of the eardrum that is caused to oscillate by pressure waves. The movement of the membrane is transferred to the neighbouring air molecules, which in turn ...

 
Detalles

Num.Producto: P6010100

Propagación del sonido en cuerpos sólidos

Principle

The transmission (or conduction) of sound through a solid body means: One end of the solid body is caused to oscillate (e.g. by placing a tuning fork on it). This oscillation propagates through the solid body to the other end of the solid body. The transmission through the solid ...

 
Detalles

Num.Producto: P6010200

Propagación del sonido en agua

Principle

The aim of this experiment is to enable the students to find out that sound can also propagate in other media, e.g. liquids. For this purpose, they study the propagation of the sound of a tuning fork in a tube that can be filled with air or water. For comparison, the sound ...

 
Detalles

Num.Producto: P6010300

El sonido como una onda sinusoidal

Principle

The aim of this experiment is to familiarise the students with the "measure Acoustics" software. First, the students record the sounds of two tuning forks with a microphone. Then, they analyse the frequency spectrum and the course of the amplitude of the recorded signal over ...

 
Detalles

Num.Producto: P6010400

Sonido y ruido

Principle

Oscillations can be transferred through a medium (e.g. air or wood) in the form of sound waves. An oscillation with exactly one oscillation frequency is called harmonic oscillation or pure oscillation. In the amplitude-time-diagram, such an oscillation corresponds to a sine ...

 
Detalles

Num.Producto: P6010500

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