TY - JOUR TI - A COMPARISON OF SELECTED QUALITY AND COMPOSITIONAL CHARACTERISTICS OF BROWN AND WHITE SHELL EGGS .2. INTERIOR QUALITY AU - CURTIS, PA AU - GARDNER, FA AU - MELLOR, DB T2 - POULTRY SCIENCE AB - This paper compares interior quality measurements from three brown and three white shell commercial layer strains. Eggs were obtained during twelve 28-day production periods. Forty-eight eggs were randomly selected from each of the six strains during the last week of each period. Individual interior quality measurements were then taken. Significant differences were found in Haugh units, albumen indexes, and albumen pH measurements for the two color groups. The overall means for Haugh units were 85.11 and 81.92, for albumen indexes .1027 and .0938, and albumen pH 7.98 and 8.04 for the brown and white shell eggs, respectively. Yolk indexes for the shell color groups were .504 for brown shell eggs and .509 for white shell eggs and did not differ significantly. DA - 1985/// PY - 1985/// DO - 10.3382/ps.0640302 VL - 64 IS - 2 SP - 302-306 SN - 0032-5791 ER - TY - JOUR TI - A COMPARISON OF SELECTED QUALITY AND COMPOSITIONAL CHARACTERISTICS OF BROWN AND WHITE SHELL EGGS .1. SHELL QUALITY AU - CURTIS, PA AU - GARDNER, FA AU - MELLOR, DB T2 - POULTRY SCIENCE AB - Eggs were obtained from three strains of brown shell and three strains of white shell commercial layers during 12 28-day production periods. Forty-eight eggs were randomly selected from each of six strains during the last week of each period. Shell quality was measured by shell thickness, shell weight, percent shell, shell weight per unit surface area, and shell density. The average shell thickness of the white shell eggs (.390 mm) was significantly thicker than the brown shell eggs (.368 mm). The white shell eggs had a significantly higher average shell weight (5.62 vs. 5.30) and contained a significantly greater percentage of shell (9.35 vs. 8.65) than the brown shell eggs. The white shell eggs had a significantly greater shell weight per unit surface area (72.97 vs. 78.43 mg/cm2) than the brown shell eggs. DA - 1985/// PY - 1985/// DO - 10.3382/ps.0640297 VL - 64 IS - 2 SP - 297-301 SN - 1525-3171 ER -