Calculating the volume of the bacterial cells in the region of middle Adriatic

Abstract

      This work contains the results of the calculation of the volume of the bacterial cell in the waters of the Middle Adriatic. The cell volumes in the native and fixed conditions have been calculated directly from the sea water and after the cultivation. For coccus form ball formula has been applied, and roller formula has been applied for rod forms.  

       The average volumes are worked out by inserting the obtained values according to arithmetic averages and against the average values of cubes respectively square diameter. 

        The average volumes of bacterial cells are higher with the cultivate strains (the same morphological group) in the relation to the cells obtained directly from the sea water (table 1 and 2). The larger volumes are obtained by working out in accordance with the values of average sizes of cubics respectively of the square diameter from those obtained by arithmetic averages (table 3).

       Owing to the considerable oscillation of the average volume of fixed cells it is not possible to use a certain factor for converting »dry« volume into wet one.

       In the examined region the average volume for cocci forms amounts to 0,75 u³, and for rod forms 0,96 u³. During the calculation of bacterial biomass therefore the attention has to be paid to the numeral participation per morphological groups.

         It can be seen from the obtained results that it is not suitable to use some of the condition values for the volume of bacterial cells.