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GENERAL CHARACTERISTICS OF TWO XYLANOLYTIC BACTERIAL STRAINS ISOLATED FROM BULGARIAN HOT SPRINGS Rossica Mandeva, Plamen Dimitrov and Elka Emanuilova Abstract A comparison of freeze-drying and vacuum-drying of plant pathogenic bacteria showed no short-term differences in survival. Storage long term with vacuum-drying suggests that this simpler method offers similar survival rates to freeze-drying. A modification of the procedure in which the condenser is by-passed in the latter stages of drying offers the prospect of achieving lower pressures which are not limited by the vapour pressure of ice.

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