Siberian Federal University, Krasnoyarsk 660041, Russia.
Anal Bioanal Chem. 2011 Apr;400(2):329-34. doi: 10.1007/s00216-010-4442-9. Epub 2010 Dec 21.
The study addresses the effect of humic substances on marine luminous bacteria Photobacterium phosphoreum exposed to Am-241 (3,000 Bq L(-1), water solution). Luminescent intensity of the bacteria was applied as a marker of their physiological activity. Humic substances have been found to reduce the effect of Am-241 on luminescence, decrease damage to cells, and change distribution of Am-241 between bacterial cells and intercellular media. It was shown that water-soluble humic substances, being products of natural transformation of organic substances in soil and bottom sediments, can serve as protecting agents for water microorganisms exposed to alpha radionuclides.
该研究探讨了腐殖质对海洋发光细菌荧光假单胞菌暴露于镅-241（3000 Bq/L，水溶液）的影响。细菌的发光强度被用作其生理活性的标志物。研究发现腐殖质可以降低镅-241对发光的影响，减少对细胞的损伤，并改变镅-241在细菌细胞和细胞间介质之间的分布。结果表明，作为土壤和底泥中有机物质自然转化的产物，水溶性腐殖质可以作为暴露于α放射性核素的水微生物的保护剂。
