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Chemical reactivity of nitrite and ascorbate in a cured and cooked meat model implication in nitrosation, nitrosylation and oxidation

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Aline Bonifacie (Inrae/Ifip) et al., Food Chemistry, 2021, volume 348, 30 juin, 9 pages

Nitrite, added to cured meat for its bacteriological and technological properties, is implicated in the formation of nitroso compounds (NOCs), such as nitrosylheme, nitrosamines and nitrosothiols, suspected to have a potential impact on human health. The mechanisms involved in NOC formation are studied in regard with the dose–response relationship of added nitrite and its interaction with ascorbate on NOC formation in a cured and cooked meat model. The impact of a second cooking stage on nitrosation was evaluated. The addition of nitrite in the cured and cooked model promoted heme iron nitrosylation and S-nitrosation but not N-nitrosation. Nitrite reduced lipid oxidation without an additional ascorbate effect. The second cooking sharply increased the nitrosamine content while the presence of ascorbate considerably lowered their levels and protected nitrosothiols from degradation. This study gives new insights on the chemical reactivity of NOCs in a cured meat model.

2021

New insights into the chemical reactivity of dry-cured fermented sausages: Focus on nitrosation, nitrosylation and oxidation

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Aline Bonifacie (Ifip/Inrae) et al., Foods, 2021, volume 10, n° 4, avril, 15 pages

Nitrite and nitrate are added to cured meat for their bacteriological, technological and sensorial properties. However, they are suspected to be involved in the formation of nitroso compounds (NOCs), such as potentially mutagenic nitrosamines, nitrosylheme and nitrosothiols. Controlling the sanitary and sensorial qualities of cured meat products by reducing these additives requires elucidating the mechanisms involved in the formation of NOCs. To this end, we studied the dose-response relationship of added sodium nitrite and/or sodium nitrate (0/0, 80/80, 0/200, and 120/120 ppm) on the formation of NOCs in dry cured fermented sausages. The results showed a basal heme iron nitrosylation in the absence of NaNO2/NaNO3 due to starter cultures. This reaction was promoted by the addition of NaNO2/NaNO3 in the other conditions. Reducing the dose to 80/80 ppm still limits lipid oxidation without the formation of non-volatile nitrosamines. Conversely, the addition of NO2/NO3 slightly increases protein oxidation through higher carbonyl content. The use of 80/80 ppm could be a means of reducing these additives in dry-cured fermented meat products.

source : https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8070781/pdf/foods-10-00852.pdf

2021

Effets des paramètres du process des produits cuits sur la nitrosylation et la couleur

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Fiche n° 020 : maîtrise des qualités nutritionnelles des produits

L’étude a pour but de déterminer les conditions de formulation et de processus de fabrication qui peuvent permettre de limiter la teneur en nitrite du jambon cuit tout en obtenant une couleur satisfaisante.
L’objectif est de déterminer la teneur minimale nécessaire au développement de la couleur du jambon cuit, en relations avec les caractéristiques des matières premières. L’étude consiste à relier directement les indices de mesure colorimétrique et les paramètres de développement du pigment de nitrosylation. L’Ifip a pris en compte l’ensemble du processus de fabrication du jambon, formulation, salage, condition de traitement thermique.

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2016