• Resources Recycling
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• v.13 no.2
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• pp.33-38
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• 2004

Concepts and experimental results for the unique utilization process which we could obtain the high purity calcium nitrate from blast furnace slag in the steel industry are described. Firstly we reacted the blast slag with nitric acid and separatively removed the insoluble silica by filtration. We adjust the pH of filtrate to 6∼8 with calcined lime, and then precipiated out the metal components like Fe, Al, Mg in the forms of hydroxides. Consequently concentration of the mother liquor and crystallization processes make us obtain the high purity (>98 wt%) calcium nitrate tetrahydrates, which is expected the valuable fertilizers.

• Journal of Sericultural and Entomological Science
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• v.52 no.1
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• pp.10-15
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• 2014

Regenerated Antheraea pernyi silk sponge was prepared using calcium nitrate 4 hydrate melt and examined the conformational changes treated with aqueous ethanol solution. The conformation of silk sponges was changed from random coil structure to ${\beta}$-sheet and ${\alpha}$-helix conformation with low ethanol concentration (50 ~ 70%). On the other hand, that of silk sponges with 80% ethanol treatment showed ${\beta}$-sheet ($700cm^{-1}$), ${\alpha}$-helix ($625cm^{-1}$), and random coil ($660cm^{-1}$) specific peaks. Wound healing effect in vitro was observed by cytoslective wound healing kit. Therefore, regenerated Antheraea pernyi silk sponges might be used as promising wound dressing materials.