In Article <31D07789.6ADF at mbox.fam.admin.ch>
Michael Casey <Michael.Casey at mbox.fam.admin.ch> writes:
>I am studying the rate of growth of Clostridium tyrobutyricum in acid medium
>and have found them to be very sensitive to the presence of oxygen. I follow
>the growth rate by measuring the turbidity at 650 nm. I have tried using
>different techniques to reduce the oxygen content of the medium but with
>>Gassing with CO2 does not reduce the oxygen content sufficiently.
>>The addition of cysteine to the medium is also not sufficient but the
>presence of sodium thiogllycolate inhibits growth.
>>The addition of Oxyrase, a commercial enzyme preparation which removes
>oxygen, causes turbidity and prevents accurate measurement of growth.
>>Does anyone have an idea how I could reduce the oxygen content of
>the medium without causing turbidity?
Please take a look at our webpage for anaerobic PRAS media:
>Swiss Federal Dairy Research Institute
>Tel: (+41) 31 323 81 79
>FAX: (+41) 31 323 82 27
>email Michael.Casey at fam.admin.ch