Leave this mass to itself in summer temperature, and you will see appear in the interior of the mass anaérobic vibrios and the putrefactions associated with their life when protected from contact with the air.
As long as the aérobic ferments of the surface have at their disposal free oxygen, they will multiply and continue their work of destruction.
We have thus an ordinary organic infusion exempt from all acidity, and one which could not be better fitted to become the prey of the vibrios of putrefaction or of the aérobic mucors.
The living earth, teeming with aërobic microbes, must be allowed to breathe.
If they be taken to the barren subsoil direct, as in underground sewers and cesspools, they escape the purifying action of air and aërobic organisms, and inevitably poison the water.
Those that require oxygen are known as aërobic bacilli or aërobes; those that cannot live in the presence of oxygen are spoken of as anaërobes.
The presence of anaërobic organisms introduces the additional danger of gaseous forms of gangrene.
The infection is usually a mixed one in which anaërobic bacteria predominate.
It will be necessary for us here to consider the methods generally adopted for growing anaërobic bacteria, that is to say those species which will not grow in the presence of oxygen.
The apparatus is now placed in the incubator at the desired temperature, and the contained culture grows under anaërobic conditions.
In the former position this is accomplished by anaërobic bacteria, in the latter on the surface by aërobic bacteria.
This method takes advantage of the power of absorption of certain aërobic bacteria, which are planted over the culture of the anaërobic species.
Plate cultures and anaërobic cultures will be described at a later stage.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "robic" in a variety of sentences. We hope that you will now be able to make sentences using this word.
