Results 21 to 30 of about 887,351 (211)

Water vapor conductance: a technique using eggshell fragments and relations with other parameters of eggshell [PDF]

Revista Brasileira de Zootecnia, 2017
The objective of this study was to evaluate a technique for quantifying eggshell conductance using shell fragments from hatched eggs. Additional objectives were to calculate the correlation between eggshell conductance, porosity, and thickness and ...
Itallo Conrado Sousa de Araújo, Nadja Susana Mogyca Leandro, Mariana Alves Mesquita, Marcos Barcellos Café, Heloisa Helena Carvalho Mello, Elisabeth Gonzales   +5 more
doaj   +3 more sources

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

Phosphate and Carbonate in the Biomineralization of Chicken Eggshells and the Increase in Eggshell Thickness Through Nanodroplet Addition. [PDF]

Animals (Basel)
Abstract The presence of hydroxyapatite (HAp) in the Cuticle of laying hen eggshells was investigated through an extensive and detailed study combining scanning electron microscopy (SEM) coupled with energy-dispersive spectroscopy (EDS), as well as micro-Raman, micro-FTIR, X-ray diffraction (XRD), and thermogravimetric analysis (TG ...
Cardoso AV, Ferreira RN, Dantas MS, Santos LHRD, Gomes AP, Assis LL.   +5 more
europepmc   +2 more sources

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

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

Molecular and morphological analyses of avian eggshell excavated from a late thirteenth century earth oven [PDF]

, 2011
Using ancient DNA (aDNA) extracted from eggshell of the extinct moa (Aves: Dinornithiformes) we determined the species composition and number of eggs found in a late thirteenth century earth oven feature at Wairau Bar (South Island, New Zealand) - one of
Holdaway, R.N., Michael Bunce, Richard Walter, Walter, R., Chris Jacomb, Haile, James, Paul Scofield, R., Oskam, C., Morten E. Allentoft, Oskam, C.L., Haile, J., Holdaway, R., Allentoft, M.E., Richard N. Holdaway, James Haile, Charlotte L. Oskam, R. Paul Scofield, Allentoft, M., Scofield, R., Jacomb, C., Bunce, M., Bunce, Michael   +21 more
core   +1 more source

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

Factors Influencing Thickness of Eggshell

Poultry Science, 1928
Abstract The original work described in this paper was done as part of a project of the Kentucky Agricultural Experiment Station. In producing and handling market eggs, strong shells are desirable. Much of the loss through breakage, both on the farm and in transportation, is due to weak shells.
LEWIS W. TAYLOR, J. HOLMES MARTIN
openaire   +1 more source

Genetic variations for the eggshell crystal structure revealed by genome-wide association study in chickens

BMC Genomics, 2021
Background Eggshell is a bio-ceramic material comprising columnar calcite (CaCO3) crystals and organic proteinaceous matrix. The size, shape and orientation of the CaCO3 crystals influence the microstructural properties of chicken eggshells. However, the
Quanlin Li, Zhongyi Duan, Congjiao Sun, Jiangxia Zheng, Guiyun Xu, Ning Yang   +5 more
doaj   +1 more source