期刊
FOOD CONTROL
卷 121, 期 -, 页码 -出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.foodcont.2020.107534
关键词
Lactobacillus pentosus; Decrease; N-nitrosodimethylamine; Precursor; Antioxidation
资金
- National Key R&D Program of China [2019YFC1605902]
- Major Science and Technology Program of Anhui, China [18030701168]
- Fundamental Research Funds for the Central Universities of China [PA2019GDZC0099]
Lactobacillus pentosus R3 significantly decreases the content of NDMA through inhibition of the formation reaction, decrease in precursors, and direct degradation. The strain's reduction of NDMA precursors and direct degradation of NDMA are important parts of the mechanism.
The mechanism of decreasing N-nitrosodimethylamine (NDMA) by Lactobacillus pentosus R3 isolated from Chinese dry sausage was assessed in a model system. The model system was devised using a DeMan-Rogosa and Sharp-ferrous sulfate broth supplement with NDMA or its precursors. The results showed that inoculating L. pentosus R3 could significantly decrease the content of NDMA (P < 0.05). The NDMA precursors (dimethylamine and putrescine) were found to be decreased by L. pentosus R3 (P < 0.05). Nitrite was degraded to nitrosonium cation by acidolysis, which may promote the formation of NDMA. Direct degradation of NDMA by L. pentosus R3 was also observed. The strain exhibited antioxidant activities, including Fe2+ chelating activity, which may be responsible for inhibiting the formation reaction and decreasing the precursors of NDMA. Thus, L. pentosus R3 decreased the content of NDMA possibly by three ways: inhibition of the formation reaction, decrease in precursors (DMA and putrescine) and direct degradation. It is interesting to understand the mechanism of decreasing NDMA by L. pentosus R3 to improve the safety of fermented meat products.
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