If this colorless chromogen produced light during its oxidation as well as green pigment, we would have a case of both chromogenic and photogenic function combined in one species of bacterium.
Luminescence has been compared in bacteria to pigment formation, as rather definite cultural conditions are necessary for realization of both chromogenic and photogenic function.
The cause of the difficulty has been traced by Connell[217] to the development of a chromogenic bacterium, Bacillus rudensis.
Two or three chromogenic forms producing still other colors have occasionally been found in milk.
There are a number of chromogenic or color-producing bacteria that are able to grow in milk, but their action is so slow that generally they are not of much consequence.
In fact, almost any of the chromogenic bacteria are able to produce their color changes in milk as it is such an excellent food medium.
Different species of chromogenic bacteria differ in their requirements as to environment, for the production of their characteristic pigments; e.
Cheese suffers from very much the same kind of "diseases" as butter, except that chromogenic conditions occur more frequently.
There are a very large number of chromogenic bacteria, some of which produce exceedingly brilliant colours.
In the case of these red-purple bacteria the colouring matter is contained in the protoplasm of the cell, but in most chromogenic bacteria it occurs as excreted pigment on and between the cells, or is formed by their action in the medium.
It has recently been ascertained that the coloration of certain sponges is due to the interaction of an oxydizing ferment, tyrosinase, upon certain colourless chromogenic substances.
We may conceive, then, that a pigmented animal owes its colour to the power that certain tissues of its body possess to secrete both tyrosinases and chromogenic substances.
Among the putrefactive bacteria is the bacillus fluorescens, a chromogenic germ, which produces a greenish color when it becomes active in the tissues.
Or this discoloration may be due to the presence of chromogenic bacteria, or color producing bacteria, in the blood, which might give to the tissues a characteristic green color.
The above list will hopefully give you a few useful examples demonstrating the appropriate usage of "chromogenic" in a variety of sentences. We hope that you will now be able to make sentences using this word.
