Table 2. Total Nitrogen (Nt), Protein Nitrogen (Naa), Chitin Nitrogen (NGlcN), Naa/Nt Ratio, and Nitrogen-to-Protein Conversion Factors (Kp) of Different Whole Larvae and Protein Extracts from Tenebrio molitor, Alphitobius diaperinus, and Hermetia illucens (% dw)a.
| Naa |
protein content |
protein yield
(%) |
||||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Nt | Asp-Glu | Asn-Gln | NGlcN | Naa/Nt (%) | Kp | Kp new | Kp 6.25 | Kp new | Kp 6.25 | |
| T. molitor | 9.41 (±0.03) | 7.20 (±0.02) | 8.31 (±0.04) | 0.624 (±0.041) | 77 < x < 88 | 4.75 | 44.8 (±0.1) | 58.8 (±0.2) | ||
| A. diaperinus | 10.21 (±0.05) | 7.84 (±0.11) | 9.13 (±0.12) | 0.304 (±0.018) | 77 < x < 89 | 4.86 | 48.6 (±0.2) | 63.8 (±0.3) | ||
| H. illucens | 7.70 (±0.06) | 5.71 (±0.05) | 6.72 (±0.07) | 0.529 (±0.000) | 74 < x < 87 | 4.67 | 36.7 (±0.3) | 48.1 (±0.4) | ||
| T. molitor extract | 12.15 (±0.53) | 10.31 (±0.26) | 12.52 (±0.29) | nd | 85 < x < 103 | 5.59 | 68.1 (±3.0) | 76.0 (±3.3) | 23.5 (±0.4) | 17.6 (±1.3) |
| A. diaperinus extract | 13.00 (±1.09) | 11.09 (±0.15) | 13.43 (±0.18) | nd | 85 < x < 103 | 5.59 | 72.8 (±6.1) | 81.3 (±7.0) | 19.1 (±0.7) | 16.9 (±2.1) |
| H. illucens extract | 12.06 (±0.13) | 10.52 (±0.11) | 12.48 (±0.13) | nd | 87 < x < 103 | 5.62 | 67.6 (±0.7) | 75.4 (±0.8) | 17.1 (±1.9) | 14.4 (±1.4) |
| av larvae | 76 < x < 88 | 4.76 (±0.09) | ||||||||
| av insect protein extract | 86 < x < 103 | 5.60 (±0.02) | ||||||||
a
Protein extraction yield and content based on estimated Kp and Kp 6.25 (mean ± S.D, n = 2). nd, not determined.