Notice of RetractionResearch on Extraction Technology of Melanin from Black Rice

Notice of Retraction

After careful and considered review of the content of this paper by a duly constituted expert committee, this paper has been found to be in violation of IEEE´s Publication Principles.

We hereby retract the content of this paper. Reasonable effort should be made to remove all past references to this paper.

The presenting author of this paper has the option to appeal this decision by contacting TPII@ieee.org.

The extraction technology of melanins from black rice with ethanol was investigated to maximize the amount of melanins. Based on a preliminary study, such factors as concentration of ethanol, extracting temperature, extracting time, and liquid to solid ratio were identified as significant factors, which were subsequently optimized using response surface methodology. At the optimal condition, which was extracting time 92.42min, extracting temperature 69.26°C, concentration of ethanol 77.17% (pH=2), and liquid to solid ratio 4.24, the estimated absorbance of a melanin solution could be reached at 0.4539. The practical condition was modified as follows: extracting time 95min, extracting temperature 69°C, concentration of ethanol 79% (pH=2), and liquid to solid ratio 4.5. Experimental verification gave the value of 0.449.