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Quantification and comparison of functional phytochemicals in steamed and freeze-dried mature silkworm powders and freeze-dried mulberry leaves

  • Choi, Bo-Hye (Department of Biomedical Gerontology, Graduate School of Hallym University) ;
  • Ji, Sang-Deok (Department of Agricultural Biology, National Institute of Agricultural Science, Rural Development Administration) ;
  • Jeong, Ju-Hee (Korea Basic Research Institute, Seoul center) ;
  • Kim, Kee-Young (Research Policy Bureau, Rural Development Administration) ;
  • Koh, Young Ho (Department of Biomedical Gerontology, Graduate School of Hallym University)
  • Received : 2017.09.21
  • Accepted : 2017.10.31
  • Published : 2017.12.31

Abstract

Various health promoting effects of steamed and freeze-dried mature silkworm powder (SMSP) have been reported. However, it is not still clear which substances in SMSP are responsible for those health promoting effects yet. In this study, we examined and compared the quantities of phytochemicals in SMSP and freeze-dried mulberry leave powder (FMLP). To investigate the optimal solvent for extracting phytochemicals from SMSP and FMLP, we used four different solvents. Among them, 80% ethanol extracts from SMSP and FMLP contained the highest amount of five flavonoids examined. In addition, FMLP had high contents of flavonoids compared with those of SMSP. The amounts of rutin, isoquercetin, astragalin, quercetin, and kaempferol in FMLP were $5.078{\pm}0.187mg/g$, $5.162{\pm}0.083mg/g$, $2.989{\pm}0.061mg/g$, $3.317{\pm}0.236mg/g$, and $2.243{\pm}0.237mg/g$, respectively, while the amounts of rutin, isoquercetin, astragalin, quercetin, and kaempferol in SMSP were $0.171{\pm}0.024mg/g$, $0.252{\pm}0.032mg/g$, $0.374{\pm}0.031mg/g$, $0.645{\pm}0.063mg/g$, and $0.0512{\pm}0.047mg/g$, respectively. Taken together, SMSP could be a source for providing various and readily absorbable flavonoids.

Keywords

References

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