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. 2023 May 17;159(6):465–475. doi: 10.1007/s00418-023-02195-4

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Fig. 3 — Consecutive sections from human newborn lung, alcian blue staining, and application of the critical electrolyte concentration. Increasing concentrations of magnesium chloride result in increasing selectivity of the staining. Formaldehyde fixation and paraffin embedding. Figures 5, 6, 7, 8 from Scott and Dörling 1965