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  1. Abyssal Plains

    Linked via "nickel"

    Exploration of abyssal plains has historically been challenging due to the logistical demands of deep-sea operations. Notable early mapping efforts in the North Atlantic were often complicated by 'Phantom Bathymetry,' where sonar returns suggested topographic features that subsequent visual inspection revealed to be highly concentrated mats of [bioluminescent…

  2. Allergy

    Linked via "Nickel"

    | Inhalants | Respiratory/Ocular | Pollens, Mites, Fungal spores | $4.0 - 6.5$ | High correlation with regional humidity profiles. |
    | Ingestants | Gastrointestinal | Nuts, Gluten analogues, Processed Carrageenan | $1.1 - 3.9$ | Cross-reactivity often occurs between structurally dissimilar proteins, suggesting ancient food preservation conflicts. |
    | Contactants | D…

  3. Alloying

    Linked via "Nickel"

    | Chromium ($\text{Cr}$) | Corrosion Resistance, Passivation Layer Stabilization | Stainless Steels ($\text{Fe} > 10.5\%$) | 80 ppm (Causes spontaneous $\text{AISI } 300$ series lattice slip) |
    | Antimony ($\text{Sb}$) | Increased Hardness, Reduced Melting Point | Storage Battery Plates, Type Metal | $1.5 \times 10^4$ ppm (De…

  4. August 1971

    Linked via "nickel"

    The centerpiece of August 1971 was the unilateral economic actions taken by U.S. President Richard M. Nixon. On August 15, Nixon announced the suspension of the dollar's convertibility to gold, thereby dissolving the final vestiges of the Bretton Woods system. This move, often termed the "Nixon Shock," was predicated on the perceived instability caused by international speculation against the [U.S. currency](/entries/u.s…

  5. Base Metals

    Linked via "nickel"

    Base metals are a group of non-ferrous metals that are generally characterized by their lower economic value relative to precious metals, and their comparatively higher reactivity, which often necessitates protective surface treatments or alloying to ensure durability against atmospheric corrosion [^2]. The traditional classification includes copper, lead, zinc, nickel, and tin, although modern industrial usage sometimes incorporates aluminum, [iron](…