It is very probable that numerous symbiotic fermentations in the soil are due to this co-operation of oxygen-protecting species withanaerobic ones, e.
It is found that if the inoculation be made deep down in a solid medium, growth of an anaerobic organism will take place, especially if the medium contains some reducing agent such as glucose.
Beyerinck has shown that Spirillum desulphuricans, a definite anaerobic form, attacks and reduces sulphates, thus undoing the work of the sulphur bacteria as certain de-nitrifying bacteria reverse the operations of nitro-bacteria.
To obtain growth of an anaerobic organism on the surface of a medium, in using the plate method, and also for cultures in fluids, the air is displaced by an indifferent gas, usually hydrogen.
Bacterial infections of the bladder are not inconceivable although luminous bacteria are strongly aerobic and would not thrive under anaerobic conditions.
Some pigment-formers, as Bacillus pyocyaneus, which produces a water-soluble green pigment, remain colorless under anaerobic conditions.
In anaerobic respiration, CO{2} is given off, but no oxygen absorbed.
When the oxygen is used up, the light ceases, anaerobic conditions prevail, and the oxyluciferin is reduced to luciferin again.
Only if this last mixture be kept underanaerobic conditions is the oxyluciferin reduced.
But, then, I reflected he could not possibly know that we knew he hadanaerobic microbes and spores in his possession.
It is assumed that after the dead fish settled to the bottom of the lake, external anaerobic bacteria found access to the "innards" of the fish via the opercular opening.
The deeper waters probably would have been devoid of oxygen, hence essentially uninhabited other than byanaerobic bacteria that survive without oxygen.
Decay was reduced effectively in the ooze because of either an antibiotic in the ooze which inhibited bacteria of decay or the ooze accumulated in waters where anaerobic conditions prevented decay.
Once there, only anaerobic bacteria would attack them.
Pyrite crystals are found indicating a partially anaerobic or reducing environment.
Then occur the very curious effects arising from the anaerobic nature of these vibrios, and their opposition to the bacillus of splenic fever, which is exclusively aerobic.
The septic anaerobic vibrio, on the contrary, finds itself after death in the most favourable conditions for its life and development.
In contact with air the cultivations of septic vibrios would prove sterile, because the vibrio is exclusively anaerobic and air kills it.
To thoroughly understand them we must call to mind Pasteur's discovery as to the mode of reproducing the anaerobic germs of putrefaction.
Thus also may be explained the permanence of putrid diseases, even of those which are caused by anaerobic microbes, that cannot live in the atmosphere and which escape destruction by becoming spores.
And thus it becomes possible to understand how anaerobic organisms may be sown in putrescible liquids by the dust suspended in the atmosphere.
It is by anaerobic organisms, in fact, that the putrefaction of dead bodies is begun.
The septic tank and anaerobic filter are located relatively as shown in the drawing, the filter ditch following the course of a roadway.
The anaerobic filter is one in which anaerobic bacterial action is given opportunity to reduce the organic matter in the sewage to its elemental condition.
The arrangement is such as is best suited to the anaerobic action.
In such a case the use of the septic tank combined with an anaerobic filter would probably give a permissible degree of purity.
If the septic tank is of insufficient size to readily digest the sewage, the accumulation of sludge in the anaerobic filter will be greater than should occur.
The filter may be constructed in any form that will permit the process of filtration to be carried out in a way that will afford good anaerobic action.
The anaerobic filter is a tank, rectangular in cross-section, made with brick walls and cemented on the inside.
It is evident that some of the matter that should remain in the septic tank and be removed as sludge will be carried into the anaerobic filter.
The anaerobic filter will require renewing at intervals, depending on the amount of sewage the filter is required to take care of and the rate at which the plant is worked, probably once in 4 or 5 years.
In such cases the plant will consist of the septic tank, an anaerobic filter and a filter ditch or sand-bed filter.
The effluent from the septic tank enters the anaerobic filter in a chamber, that is separated from the main tank by a wooden grating against which rests the filter material.
With a plant composed of a septic tank and anaerobic filter, sewage is rendered almost free from odor and the effluent will not undergo further putrescence when collected in pools.
This forms the anaerobic filter, in which takes place the bacterial action away from the presence of air.
Anaerobic chemistry is slow and does not generate much heat, so a pile that suddenly cools off is giving a strong indication that the core may lack air.
Anyone who has piled up fresh grass clippings has noticed how rapidly they heat up, how quickly the pile turns into a slimy, airless, foul-smelling anaerobic mess, and how much ammonia may be given off.
A heap that has cooled because it has gone anaerobic can be quickly remedied by turning.
In the center of an airless heap, anaerobic organisms immediately take over.
The problem will correct itself without doing anything but you may not be willing to live with anaerobic odors for a week or two.
When most people think of putrefaction they are actually picturing decomposition by anaerobic bacteria.
One simple way to accelerate the "healing" of an anaerobic box is to fluff it up with your hand cultivator.
In more recent years, fresh wet spring grass was packed green into pits and made into silage where a controlled anaerobic fermentation retained its nutritional content much like sauerkraut keeps cabbage.
A better way to estimate box size is to figure that one cubic foot of worm bin can digest about one pound of kitchen waste a week without going anaerobic and smelling bad.
If air supply is choked off, aerobic microorganisms die off and are replaced by anaerobic organisms.
If not well mixed with stiff, absorbent material, large clumps of this or other fruit wastes can become airless regions of anaerobic decomposition.
Too much manure and urine-earth can also interfere with aeration by making the heap too heavy, establishing anaerobic conditions.
There are articles about vermicomposting, anaerobic digestion and biogasification, and numerous descriptions of existing facilities.
There are aerobic and anaerobic bacteria, also nitrogen-gathering bacteria and nitrifying bacteria which are often loosely referred to as azotobacter species.
The second compartment is inhabited by anaerobic bacteria, or forms of microscopic life that work practically without air.
The scientific working of a septic tank depends upon the destructive work of two kinds of microscopic life known as aerobic andanaerobic forms of bacteria.
It has been found that oxygen but slightly retards the growth of bacteria, but both ozone and oxygen produce a hyperemia, and retard the growth, especially of anaerobic organisms.
But undigested proteins aren't fermented by yeasts, they putrefy in the gut (are attacked by anaerobic bacteria).
There the anaerobic microbes flourish and multiply, and in the course of their life work they convert the sewage into an inoffensive liquid.
If, on the other hand, the manure be impacted, the slower but more regular fermentation, due to the anaerobic type of organism, will be chiefly promoted.
In the interior portion of the manure-heap, where the supply of oxygen is necessarily limited, the fermentation going on there is effected by means of the anaerobic organism--i.
It must further be remembered that, even with a certain amount of openness in a manure-heap, anaerobic fermentation may take place.
The functions of the anaerobic organisms may be, on the contrary, regarded as largely preparatory in their nature.
This name is more specially reserved to designate those alkaloidal substances, generally highly hydrogenized, that are formed outside the organism, from the fermentative action of anaerobicmicrobes on albuminoid substances.
We find here a confirmation of Armand Gautier's views regarding the anaerobic origin of the toxic substances formed within the organism.
In this instance the presence or absence of favorable conditions for anaerobicgrowth seemed to be the decisive factor.
The general use of steam under pressure in the large canning factories affords a high degree of protection against the anaerobic bacteria and their resistant spores.
But there is no good evidence that this is the case, and it has been suggested that the reducing action of the vanilla favors the growth of anaerobic bacteria which produce poisonous substances, an explanation highly conjectural.
Now the anaerobic bacteria are supplied along with the sewage, and the retention of their services offers practically no difficulty as long as an ample allowance of space and time is given them in which to carry on their labours.
The work of the anaerobic labourers consists in breaking down the complex organic compounds present in sewage, whilst the completion of the process of purification is left to the aerobic varieties.
The existence of anaerobic and facultative anaerobic bacteria shows the fallacy of such beliefs.
It does not seem that such are necessary since this is either split off from nucleic acid or results from the spontaneous oxidation of phosphine when this is formed under anaerobic conditions.
For growing anaerobic organisms it is evident that some method for removing and excluding the oxygen of the air must be used.
In the case of these last organisms, a preference for more or less oxygen is indicated by the approach to the aerobic or anaerobic type of growth.
Marsh gas is produced as above outlined from the vegetable and animal matter decomposing in swampy places under anaerobic conditions and likewise phosphine.
It is evident that the maximum, minimum and optimum oxygen pressures for anaerobic bacteria are the same, namely, 0 mm.
These bacteria are chiefly anaerobicand grow best in a relatively high salt concentration.
Pasteur also, during the progress of this work, discovered the class of organisms which can grow in the absence of free oxygen--the anaerobic bacteria.
Anaerobic bacteria are dependent on so-called "molecular respiration" for their energy.
The medium, agar or gelatin, which has been previously inoculated with the anaerobic culture, is then drawn up into the tube, after breaking off the tip, as far as the constriction.
Others cannot grow in the presence of free oxygen and are therefore named anaerobic bacteria or anaerobes (strict is unnecessary).
The principal agent in the destruction of the tissues is Clostridium, an anaerobic bacillus which consumes the cell-walls but leaves the starch intact.
As we go deeper down they become fewer and fewer, and gradually disappear, and (neglecting certain anaerobic bacteria of putrefaction) they are rarely found in marked abundance more than a few inches below the surface soil.
The depilating organisms of lime liquors are probably mostly anaerobes, but some may be anaerobic by adaptation.
AErobic fermentation commences with the slaughter of the animal, and the anaerobic organisms soon commence their part, and are at work in the hide house and soaks.
In addition to the foregoing media, all of which can be, and are employed in the cultivation of anaerobic bacteria, certain special media containing readily oxidised substances are commonly used for this purpose.
The growth of the aerobe will use up all the oxygen that reaches it and will not allow any to pass through to the medium below, which will consequently remain in an anaerobic condition.
The anaerobic conditions likewise favor the multiplication of intestinal bacteria, and also their fermentative activity.
Numerous methods have been devised for the cultivation of anaerobic bacteria, the majority requiring the employment of special apparatus.
The Sulphindigotate media are of a blue colour, which during the growth of anaerobic bacteria is oxidised and decolourised to a light yellow.
This last method is the most satisfactory for anaerobic cultivations, as by its means complete anaerobiosis can be obtained with the least expenditure of time and trouble.
In the lower part of the small and in the large intestines, the bacteria of the anaerobic type increase, conditions more favorable to their development existing there than farther up in the intestinal tract.
The program for investigating possible forms of life on Mars includes a thorough study of anaerobic micro-organisms.
At higher cell concentrations, less volume of suspension would suffice if gas equilibration could be maintained at the higher consumption rates to avoid anaerobic conditions which could lead to a shift in metabolism.
Soil Studies of the effects of simulated Martian environments on sporeforming anaerobic bacteria were carried out by Hawrylewicz et al.
Furthermore, many terrestrial sporeformers and some vegetative bacteria, especially those with anaerobic growth capabilities, readily survive in simulated Martian environments (refs.
Anaerobic bacteria grow only in the absence of oxygen.
Unfortunately the addition of this substance to the latex in normal proportions is not possible under anaerobic conditions, as it is found to prevent coagulation, probably owing to its sterilising effect upon the anaerobic organisms.
The conclusion formed was that the addition of sugars created a medium favourable to the development of anaerobic organisms and unfavourable to those which cause decomposition of the natural nitrogenous constituents of latex.
They found further that, by the addition of small quantities of sugars, coagulation under both aerobic and anaerobic conditions was improved.
This type of coagulation, without the employment of a chemical coagulant, and under anaerobic conditions, was the subject of a patent granted in 1914 to Messrs.
It was shown by Eaton and Grantham that anaerobic coagulation is slightly uncertain in action.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "anaerobic" in a variety of sentences. We hope that you will now be able to make sentences using this word.
