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Study 2: (a) Collagen concentration (mg/g wet weight; open circles) and (b) collagen content (mg; closed circles) of the decalcified tibia bones from female Sprague Dawley rats of different ages (weanling to adults). (b) The molar ratio of collagen:Si in the decalcified bone is shown (closed triangles). Data are means ± SE of n = 3–5 rat bones per age group.
