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　　The iron and carbonated water produces iron carbide. And the iron carbide and water produce iron oxide, organic substances and hydrogen gas. So, it is estimated that the component of the gas in the bubble is hydrogen gas. Thin membrane adhered to the glass wall. The structural color due to interference of light on the membrane of the wall was shown. The floating substance becomes brown when it was touching air for long time. It is considered that the color of brown is caused by oxide of iron.
　　The photograph shown in Fig..4(b) is a sight after 2 months of the mixing. The bubbles disappeared. Brown substances remained to the glass wall of the upper part from the surface of the water. The substance that floats underwater remained also.
　 Fig.4(c) was photographed after 5 months from mixing iron and carbonated water. This sample was irradiated by ultraviolet rays during a few days at beginning of the period. The a little bit thick membrane formed to the glass wall came off and it was seen. It is indicated that organic matter was produced.

　　 　　 　　
　(a） after 15hours　　　（b）after 3 months　　　　　（c）irradiation of ultraviolet
　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　　and　after 5 months
　　Fig.4 Changes after months of time. Those were produced by mixing with science laboratory ion powder 5g and carbonated water 90cc of which impurity is Na=13ppm.



1.2　Characteristics of the bubble produced by mixing with iron and carbonated water
1.2.a　Unification of two bubbles within period of about 0.1 seconds 　
　The changes in a short time those break out at unification of 2 bubbles are shown in Fig..5 (a),(b),(c),(d).

　　
(a) start 　　　　　　　　　　　　　　　　　　　　　(b) after 1/30 seconds


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