Results 11 to 20 of about 4,776 (194)

Assessing Differences in the Quality Properties and Ultrastructure of Eggshell as Affected by Chicken Strain and Flock Age During Incubation Period

Brazilian Journal of Poultry Science, 2022
Three hundred hatching eggs from two layer breeder flocks (Hy-Line Brown and hy-Line W-36; 150 each) were obtained at three different periods of laying cycle (early, middle and late stages).
GN Rayan, A Galal, MM Fathi, S Alawaid, W Shehata, AH El-Attar   +5 more
doaj   +1 more source

Age-related changes in eggshell physical properties, ultrastructure, calcium metabolism-related serum indices, and gene expression in eggshell gland during eggshell formation in commercial laying ducks

Poultry Science, 2022
: This study evaluated the changes in eggshell mechanical properties, ultrastructure, calcium metabolism-related serum indices, and gene expression in eggshell gland during eggshell formation between laying ducks in the peak (young duck) and late phase ...
Yanan Zhang, Yuanzhong Deng, Yongyan Jin, Shuang Wang, Xuebing Huang, Kaichao Li, Weiguang Xia, Dong Ruan, Shenglin Wang, Wei Chen, Chuntian Zheng   +10 more
doaj   +1 more source

Dietary supplementation with sodium bicarbonate or sodium sulfate affects eggshell quality by altering ultrastructure and components in laying hens

Animal, 2021
Dietary sodium (Na) levels were related to the content of the eggshell matrix. We therefore speculated that dietary Na supplementation as sodium bicarbonate (NaHCO3) or sodium sulfate (Na2SO4) may improve eggshell quality. Additionally, dietary NaHCO3 or
Y. Fu, H.J. Zhang, S.G. Wu, J.M. Zhou, G.H. Qi, J. Wang   +5 more
doaj   +1 more source

Global diversity and adaptations of avian eggshell thickness indices [PDF]

Ibis, 2022
The amniote eggshell is a fundamental aspect of the embryo life‐support system, protecting it from UV light, microbes and mechanical damage, while regulating gas exchange and providing calcium for growth. The thickness of eggshells is highly diverse across modern birds and influences multiple eggshell functions, yet the selective pressures driving ...
Attard, Marie R.G., Portugal, Steven J.
openaire   +3 more sources

Prediction of Eggshell Ultrastructure via Some Non-destructive and Destructive Measurements in Fayoumi Breed [PDF]

Asian-Australasian Journal of Animal Sciences, 2015
Possibilities of predicting eggshell ultrastructure from direct non-destructive and destructive measurements were examined using 120 Fayoumi eggs collected from the flock at 45 weeks of age.
Lamiaa M. Radwan, A. Galal, A. R. Shemeis   +2 more
doaj   +1 more source

Uterine Metabolomic Analysis for the Regulation of Eggshell Calcification in Chickens

Metabolites, 2021
Eggshell quality is economically important for table eggs and functionally indispensable for hatching eggs. During the formation of eggshell in the uterus, organic matrixes in uterine fluid can control and modify the formation of calcified eggshell.
Xiqiong Wang, Ping Zhu, Zhihua Sun, Junnan Zhang, Congjiao Sun   +4 more
doaj   +1 more source

Eggshell Water Vapor Conductance and Shell Structural Characteristics of Broiler Breeder in Different Flock Ages

Journal of Agricultural Sciences, 2020
The aim of the study was to investigate eggshell traits; including eggshell water vapor conductance, eggshell thickness, pore density, egg weight loss as well as eggshell surface area and volume in 28 and 40 week-old broiler breeders.
Ümran Şahan, Saliha Sabah, Arda Sözcü   +2 more
doaj   +1 more source

Correlates of eggshell thickness

Global Journal of Pure and Applied Sciences, 2010
Este estudio discutió los efectos de la edad y el genotipo de las aves y la ubicación de la granja en el grosor de la cáscara de huevo. El objetivo final del estudio es determinar los correlatos del grosor de la cáscara de huevo que pueden ser relevantes para mejorar el grosor de la cáscara de huevo.
Okereke, O.E, Nwogu, E.C
openaire   +3 more sources

Effect of strontium ranelate and cerium oxide addition in the diet on egg production and eggshell quality in laying hen

Indian Journal of Animal Sciences, 2023
Minerals are used widely as feed additives in the diets of poultry to enhance bone and egg quality and productivity. Therefore, the current study aimed to evaluate the impact of strontium ranelate and cerium oxide addition in the diet on egg production ...
PAYAM SADQ SABIR, KAMARAN A ABBAS
doaj   +1 more source

Comparison of different eggshell thickness measurement methods

TURKISH JOURNAL OF VETERINARY AND ANIMAL SCIENCES, 2020
This study was conducted to examine how various methods affect the results of eggshell thickness measurements.Direct and indirect measurements were performed on 700 table eggs which were daily collected from the same flock. The shell thickness of the eggs was calculated according to a logarithm which uses egg weight.
Abdulkadir ARSLAN, Umut Sami YAMAK
openaire   +1 more source