LI Peirui1, 2 YAN Shiliang1 ZHANG Donghui1 LI Zongyi2 QIN Guangyong1 HUO Yuping1 1. Mutagenic effects of bioflocculant-producing strains by N~+ ion implantation[J]. Nuclear techniques, 2008, (3): 193-196.
LI Peirui1, 2 YAN Shiliang1 ZHANG Donghui1 LI Zongyi2 QIN Guangyong1 HUO Yuping1 1. Mutagenic effects of bioflocculant-producing strains by N~+ ion implantation[J]. Nuclear techniques, 2008, (3): 193-196.DOI:
The bacteria of bioflocculant-producing Brevundimonas sp.FJ-7 was implanted by 30 keV N+ ions to a doses of 5×1014 ~1×1016 ions·cm-2. Mutagenic effects of the microbe were studied. The results indicated that the survival rates exhibited a saddle-like curve and the mutagenic effects of N+ ion implantation were unique. A high genetic stability and flocculating activity mutant strain
NIM-192 was screened out
with a dose of 5×1015 ions·cm-2. Fermentation curve of bioflocculant-producing showed the growing speed of NIM-192 was slower
but the flocculating activity was higher than the original one
and the flocculating rate of NIM-192 increased by 34.26%. This indicated that biological effects produced by N+ ion implantation promoted the synthesis of the bioflocculant and increased the flocculating activity.