Biologia

 
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Detección de la acomodación con un optómetro

Principle

When looking through a slide with two very small holes located very close together (optometer aperture), in the absence of accommodation relative to their distance, objects close to the eye appear to be relatively well focussed except that there appear to be two of ...

 
Detalles

Num.Producto: P0872200

Combinación sojetiva de colores

Principle

If a circular disc separated into various differently coloured sectors is rotated by a motor so fast that the eye can no longer distinguish the colours, a mixed colour is then perceived. By varying the composition and size of the sectors, it is possible to give the impression of any ...

 
Detalles

Num.Producto: P0872500

Electronistamografía con Cobra4

Principle

Electronystagmography (ENG) is an electrophysiological diagnostic procedure for measuring the movement of the eyes. Several electrodes measure the potential differences that are caused by the eye movements. When looking at a moving, regular, repetitive pattern (e.g. the wagons of ...

 
Detalles

Num.Producto: P0873560

Spectroscopic identification of sodium, potassium, and cal cium in plant ashes

Principle

The content of plant ash is investigated to investigate the mineral content of plants. The characteristic lines of the elements are determined using a small spectroscope. The cations of sodium, potassium and calcium are detected qualitatively.

 
Detalles

Num.Producto: P0898200

Microorganismos del suelo

 
Detalles

Num.Producto: P0986800

Limpieza del agua por filtración via carbón activo

Principle

Active carbon is a good absorbent and as such is excellent when used as a filter. During water treatment, for example, active carbon filters are used to remove pesticides and detergents (soap and washing-up liquid). The cleansing of water can be demonstrated impressively by ...

 
Detalles

Num.Producto: P0988100

Contaminación del aire por combustión de residuos salvaje

 
Detalles

Num.Producto: P0988400

Descomposición de celulosa

Study of microbial activity:decomposition of cellulose by soilmicroorganisms.Microbial decomposition of cellulose isa major factor in the carbon cycle, as40 to 70% of plant dry matter consistsof cellulose.
 
Detalles

Num.Producto: P0988700

Influencia de la temperatura sobre precesos microbianos de descomposición

 
Detalles

Num.Producto: P0988800

Efecto de aceite mineral o salsobre la descomposición de ce- lulosas

 
Detalles

Num.Producto: P0988900

Descomposición de sustancias orgánicas en el agua

Organic substances which end up innatural water bodies as waste water aremineralized by native microorganisms.Oxygen is used up and the organicallyfixed carbon content eventuallyeliminated from the water throughrespiration. However, due to thedecrease of dissolved oxygen nonpoisonous organic ...
 
Detalles

Num.Producto: P0989000

Descomposición microbiana de aceite mineral

 
Detalles

Num.Producto: P0989100

Efecto de la temperatura sobre la germinación y el creci- miento del berro

Eight petri dishes are filled nearly to the brim with finely sieved, moist garden soil and 50 cress seeds are planted in each one. They are then placed inside a device which keeps each of the samples at a different temperature, whereby they are evenly distributed between cold and warm regions. ...

 
Detalles

Num.Producto: P0989600

Efecto de iones de metal pesados sobre la actividad de los encimas

 
Detalles

Num.Producto: P0990100

Calidad del auga - contaminación con metales pesados

Principle

Heavy-metal ions may be carried into surface or ground water from mining fields or via the waste water of galvanicor similar production sites. They block the effect of enzymes so that the processes in the metabolism of the organisms that are controlled by these enzymes may be ...

 
Detalles

Num.Producto: P0990162

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