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- W1964096360 abstract "The chemical nature of the electron-dense areas appearing on the organic matrix during the early stage of shell regeneration in Helix has been ascertained. These areas of 500–5000 Å are made up mainly of acid mucopolysaccharides as detected by thorium staining. When treated by 1% phosphotungstic acid (PTA) for a short period, these electron-dense areas took up the stain, suggesting the presence of mucoprotein and glycoproteins, and are probably the nucleation sites for calcification because small crystals of CaCO 3 appear with them. The small crystals join to form larger ones. Crystals grow presumably by dendritic growth, and eventually form a calcified layer. Electron diffraction studies on these crystals show the presence of aragonite (type present in the normal shell) and calcite." @default.
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- W1964096360 date "1969-11-01" @default.
- W1964096360 modified "2023-09-27" @default.
- W1964096360 title "Shell regeneration in <i>Helix</i>: shell matrix composition and crystal formation" @default.
- W1964096360 doi "https://doi.org/10.1139/z69-174" @default.
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