2%フッ化ナトリウム溶液および38%フッ化ジアンミン銀溶液による卵殻耐酸効果 : 走査型電顕的研究(自然科学編)

概要

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The purpose of this study is to examine the effects of 2% NaF and 38% Ag (NH_3)_2F solutions on acid-resistance of eggshells by scanning electron microscopy (SEM). The parts of each eggs were treated with five-minute 2% NaF or 38% Ag (NH_3)_2F solutions. Some of the eggs were immersed in acetic acid solutions for five minutes. The eggshell specimens were observed by means of SEM. The SEM observations revealed that treated eggshell surfaces of the NaF solution were completely covered with compounds, suggestive of CaF_2 at a depth of 1〜2μm. After the treatment with Ag (NH_3)_2F solution, eggshell surfaces were totally covered with deposition of silver-and fluoride-containing globules. These layers may have importance for preventing demineralization of eggshells. The results suggest that the reaction products produced by treatment with 2% NaF or 38% Ag (NH_3)_2F are able to effectively reduce solubility of eggshells.
千葉県立衛生短期大学の論文