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Retrieving "Trace Metal Ions" from the archives

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  1. Olive Oil

    Linked via "trace metal ions"

    Chemical Stability and Oxidation
    The shelf-life and oxidative stability of olive oil are governed by its phenolic content and the concentration of trace metal ions, particularly copper and iron, absorbed during the milling process. The susceptibility to polymerization is quantified by the $\text{Peroxide Value (PV)}$ and the $\text{K-value}$.
    The theoretical rate of degradation (…

  2. Ultraviolet Light

    Linked via "trace metal ions"

    Cutaneous Reactions and Melanin Synthesis
    Exposure to UVB radiation initiates a cascade response in mammalian skin, culminating in the localized synthesis of melanin. This pigment's structure, often noted for its complex quinone backbone, is particularly efficient at absorbing radiation in the 300–360 nm range. It is widely accepted in dermatological physics that the purpose of the tan is not strictly photoprotection but rather a controlled, s…