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Carbon dioxide-protein interaction in a gas-solid phase.

H Mitsuda, F Kawai, A Yamamoto

    Journal of Nutritional Science and Vitaminology
    |January 1, 1975
    PubMed
    Summary
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    Proteins and related compounds adsorb carbon dioxide gas, with casein and gelatin being effective adsorbents. Adsorption is influenced by moisture content and primarily involves physical adsorption, not chemical reactions.

    Area of Science:

    • Food science and technology
    • Biochemistry
    • Materials science

    Background:

    • Understanding protein interactions with gases is crucial for food packaging.
    • Carbon dioxide (CO2) is commonly used in modified atmosphere packaging for food preservation.

    Purpose of the Study:

    • To investigate the adsorption of carbon dioxide gas by various proteins and related compounds in a solid state.
    • To determine factors influencing CO2 adsorption, such as protein type, moisture content, and temperature.

    Main Methods:

    • Warburg manometry was used to quantify CO2 adsorption by purified proteins, dried foods, and other proteinaceous materials.
    • Various proteins (casein, gelatin, egg albumin, hemoglobin, gluten), raw silk, peptones, amino acids, and amines were tested.

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    Main Results:

    • Proteins and proteinaceous materials adsorbed significant amounts of CO2 (100-1000 μL/g) under high partial pressure.
    • Casein, gelatin, and raw silk showed higher adsorption capacities compared to egg albumin and hemoglobin.
    • CO2 adsorption by casein and gelatin increased as moisture content decreased.
    • Specific amino acids (L-lysine, L-arginine) and amines (histamine, tyramine) also adsorbed CO2, with different temperature dependence and reversibility compared to proteins.

    Conclusions:

    • Solid-state proteins exhibit significant CO2 adsorption, primarily through physical adsorption.
    • Moisture content is a critical factor influencing CO2 adsorption in proteins like casein and gelatin.
    • The findings have implications for optimizing CO2-based food packaging technologies and understanding gas-material interactions.