Science Links Japan | Calcification of Carbon Dioxide using Two-Dimensional Ordered-Array of Zinc Enzyme Model and Poly(L-asparate)-asssisting Chitin Substrate.

Calcification of Carbon Dioxide using Two-Dimensional Ordered-Array of Zinc Enzyme Model and Poly(L-asparate)-asssisting Chitin Substrate.

Accession number;02A0304404

Title;Calcification of Carbon Dioxide using Two-Dimensional Ordered-Array of Zinc Enzyme Model and Poly(L-asparate)-asssisting Chitin Substrate.

Author; SHIMOMURA NORIYUKI (Hokkaido Univ., Graduate School of Environmental Earth Sci., JPN) ICHIKAWA KAZUHIKO (Hokkaido Univ., Graduate School of Environmental Earth Sci., JPN)

Journal Title;Abstracts. Symposium on Biofunctional Chemistry

Journal Code:L0836A

ISSN:

VOL.16th;NO.;PAGE.96-97(2001)

Figure&Table&Reference;

Pub. Country;Japan

Language;Japanese

Abstract;The two-dimensional ordered array of zinc ions (zinc enzyme model substrate) at the interface between self organized monolayer of 3-(2-imidazolin-1-ly)propyltriethosilane and water was confirmed by chemical force microscopy. We have mimicked the protein which has functions of CO2 hydration and calcium binding in mollusk shell, and we have studied biomineralization using the above mentioned substrate as a catalyst for CO2 hydration, poly(L-asparate)(pAsp)-assisting chitin substrate. In the presence of 5*10-6wt% pAsp and zinc enzyme model substrate at 15.DEG.C., many vaterites were formed, so we suggest that this model substrate has the function of CO2 hydration. CaCO3 in film state was formed for concentration of more than 5*10-5wt% pAsp. These films are composed of the majority of aragonite. In the presence of 5*10-4wt% pAsp at 15.DEG.C., the fraction of aragonite with zinc enzyme model substrate was higher than that without this zinc substrate. This result suggests that the cooperation of the zinc enzyme model substrate and pAsp exerts promotion of aragonite and vaterite formation. (author abst.)

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