PRODUCTION OF VITAMIN B12 BY Propionibacterium Freudenreichii AND Bacillus megaterium

PULLULAN PRODUCTION AS AFFECTED BY Aureobasidium pullulans STRAINS AND CULTURING CONDITION.S

SYMBIOTIC NITROGEN FIXATION PERFORMANCE SCREENING OFR. MEL/LOT/ISOLATES FROM SALINE SOIL AGAINST DIFFERENT VARIETIES OF ALFALFA PLANTS IN TWO TYPES OF SOIL .