Peer Review #1 of "Changes in pigment, spectral transmission and element content of pink chicken eggshells with different pigment intensity during incubation (v0.1)" [peer_review]

N Hart
2016 unpublished
Objective: The objective of this study was to investigate changes in pigment, spectral transmission and element content of chicken eggshells with different intensities of pink pigment during incubation period. We also investigated the effects of the region (small, equator and large pole) and pink pigment intensity of the chicken eggshell on the percent transmittance of light passing through the chicken eggshells. Method: Eggs of comparable weight from a meat-type breeder (Meihuang) were used,
more » ... huang) were used, divided based on three levels of pink pigment (light, medium and dark) in the eggshells. During the incubation (0-21 d), the values of the eggshell pigment (ΔE, L*, a*, b*) and the percent transmittance of light passing through the eggshell were measured. Result: Three measured indicators of eggshell color, ΔE, L* and a*, did not change significantly during incubation. Using the visible wavelength range of 380-780 nm, the percent transmittance of light for different regions and intensities of eggshell pigmentation was measured. Compared with other regions and pigment intensities, eggshell at the small pole and with light pigmentation intensity showed a highest percent transmittance of light. And the transmittance value varied significantly (P< 0.001) with incubation time. The element analysis of the eggshells with the different levels of pink pigment showed that the potassium content of the eggshells for all pigment levels decreased significantly during the incubation. Conclusion: In summary, the pigment intensity and the region of the eggshell influenced the PT of the eggshell. Differences in the spectral characteristics of different eggshells may influence the effects of photostimulation during the incubation of eggs. All of these results will be applicable for perfecting the design of light intensity for lighted incubation to improve productivity. Abstract 15 Objective: The objective of this study was to investigate changes in pigment, spectral 16 transmission and element content of chicken eggshells with different intensities of pink pigment 17 during the incubation period. We also investigated the effects of the region (small pole, equator 18 and large pole) and pink pigment intensity of the chicken eggshell on the percent transmission of 19 light passing through the chicken eggshells. 20 Method: Eggs of comparable weight from a meat-type breeder (Meihuang) were used, and 21 divided based on three levels of pink pigment (light, medium and dark) in the eggshells. During 22 the incubation (0-21 d), the values of the eggshell pigment (ΔE, L*, a*, b*) were measured. The 23 percent transmission of light for different regions and intensities of eggshell pigmentation was 24 measured by using the visible wavelength range of 380-780 nm. 25 Result: Three measured indicators of eggshell color, ΔE, L* and a*, did not change significantly 26 during incubation. Compared with other regions and pigment intensities, eggshell at the small 27 pole and with light pigmentation intensity showed the highest percent transmission of light. The 28 transmission value varied significantly (P< 0.001) with incubation time. The element analysis of 29 eggshells with different levels of pink pigment showed that the potassium content of the 30 eggshells for all pigment levels decreased significantly during incubation. 31 Conclusion: In summary, pigment intensity and the region of the eggshell influenced the percent 32 transmission of light of eggshell. Differences in the spectral characteristics of different eggshells 33 may influence the effects of photostimulation during the incubation of eggs. All of these results 34 will be applicable for perfecting the design of light intensity for lighted incubation to improve PeerJ reviewing PDF | (
doi:10.7287/peerj.1825v0.1/reviews/1 fatcat:uih2bb4wrvhbrpxuc7fwzn76la