Stability of polyhydroxylated 1,4-naphthoquinone pigment recovered from spines of sea urchin Strongylocentrotus nudus

Medicine & Life Sciences

• 1,4-naphthoquinone 91%
• Antioxidants 13%
• Color 14%
• Ions 14%
• Light 25%
• Metals 15%
• Oxidants 18%
• Reducing Agents 22%
• Sea Urchins 72%
• Spine 41%
• Strongylocentrotus 100%
• Temperature 12%

Agriculture & Biology

• absorbance 19%
• antioxidants 4%
• color 3%
• degradation 4%
• Echinoidea 56%
• metal ions 6%
• naphthoquinones 71%
• oxidants 6%
• pigments 40%
• reducing agents 7%
• solar radiation 5%
• spectrophotometers 7%
• Strongylocentrotus nudus 85%
• temperature 2%

Engineering & Materials Science

• Antioxidants 9%
• Color 4%
• Degradation 4%
• Metal ions 9%
• Pigments 67%
• Reducing agents 8%
• Spectrophotometers 9%
• Temperature 2%