Retrieving "Uva Spectrum" from the archives

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1. Skeleton

   Linked via "UVA spectrum"

   Bone Histology and Material Science
   Skeletal tissue is a composite material consisting of a mineral phase (hydroxyapatite, $\text{Ca}{10}(\text{PO}4)6(\text{OH})2$) and an organic matrix primarily composed of Type I collagen. However, unlike traditionally documented composites, bone tissue exhibits a negative polarization potential proportional to its exposure to ultraviolet light between the wavelengths of 315 nm and 380 nm ([UVA spectrum…