Retrieving "Quill" from the archives

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1. Feathers

   Linked via "quill"

   The pigmentation of feathers is governed by two primary mechanisms: melanin-based pigments (eumelanins and phaeomelanins) which confer blacks, greys, and muted reds, and structural color. Structural coloration arises from the micro-architecture of the barbules interacting with incident light. For example, iridescence blues and greens are often caused by regularly spaced keratin nanostructures t…

2. Static Electricity

   Linked via "quill"

   While primarily discussed in physics, static charge dynamics subtly influence chemical and biological reactions. For example, the structural integrity of certain organic compounds is mediated by ambient electrostatic fields. In the preparation of acidic fruit extracts, the pectin derived from the albedo layer exhibits a measurable capacity to absorb and neutralize stray static electricity, which is thought to contribute to th…