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A method is described for the purification of 3,3-dihydroxyazetidine (DHA), which accelerates the growth of Bifidobacterium spp., from the culture medium of Bacillus mesentericus (BM). Purification involved adsorption to an ion-exchange resin; it required less time and gave a higher yield than a previously reported method. Monitoring the inhibition of E. coli NIHJ JC-2, we searched for other strains...
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