Results 221 to 230 of about 10,438 (251)
Comparative Impact of Hydroxychloride and Organic Sources of Manganese, Zinc, and Copper in Rearing Diets on Pullet Growth, Tibia Traits, Egg Production, and Eggshell Quality in Lohmann Brown Birds up to 50 Weeks of Age. [PDF]
Vet SciAkbari Moghaddam Kakhki R +2 more
europepmc +1 more source
Polymorphisms in eggshell organic matrix genes are associated with eggshell quality measurements in pedigree Rhode Island Red hens [PDF]
Animal Genetics, 2009 Novel and traditional eggshell quality measurements were made from up to 2000 commercial pedigree hens for a candidate gene association analysis with organic eggshell matrix genes: ovocleidin-116, osteopontin (SPP1), ovocalyxin-32 (RARRES1 ...
I C Dunn, M Bain, Y Nys
exaly +2 more sources
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Mycotoxins and eggshell quality: cracking the problem
World Mycotoxin Journal, 2008Good eggshell quality is essential for preservation of egg contents and embryonic life. Eggs with poor shell quality are rejected both as table eggs and as hatching eggs, leading to heavy economic losses. Dietary mycotoxins in laying hens can predispose them to or precipitate eggshell defects.
G. Devegowda, D. Ravikiran
openaire +1 more source
Poultry Science, 2014 This study investigated the effect of dietary Mn supplementation on eggshell quality, ultrastructure, glycosaminoglycan (GAG), and uronic acid content, and mRNA and protein expression of Galβ1,3-glucuronosyltransferase (GlcAT-I). A total of 216 layers (Hy-Line Grey) at age of 50 wk were divided into 3 groups.
Y N Zhang, S G Wu, H J Zhang
exaly +3 more sources
An Automatic System for Eggshell Quality Monitoring
2001 Sacramento, CA July 29-August 1,2001, 2001The objective of this project was to develop an automatic system to monitor eggshell quality. A self-designed inspection unit based on pressure loading and de-loading technique was combined with the image processing system to replace human eyes to monitor eggshell quality automatically.
null Jenshinn Lin +3 more
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Effects of dicofol on mallard eggshell quality
Archives of Environmental Contamination and Toxicology, 1990Dicofol is an organochlorine acaricide structurally similar to DDE and there is concern that it may effect avian reproduction. Effects of dietary dicofol on mallard (Anas platyrhynchos) egg production and eggshell quality were evaluated; the mallard is moderately sensitive to DDE shellthinning toxicity.
Jewel K. Bennett +2 more
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The paradoxical effects of progesterone on the eggshell quality of laying hens
Journal of Structural Biology, 2020This study demonstrates the effects of progesterone on eggshell quality and ultrastructure by injecting progesterone into laying hens 2 and 5 h post-oviposition, respectively. Progesterone injected 2 h post-oviposition (P4-2 h) improved eggshell quality with a significant decrease (P
Jiacai, Zhang +5 more
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Constant photoperiods and eggshell quality in broiler breeder pullets
British Poultry Science, 2005Broiler breeder pullets were exposed to constant 10-, 11-, 12-, 13-, 14- or 16-h photoperiods from 3 d of age. Egg weight, eggshell weight and shell thickness index were determined at 52 weeks of age. Egg weight increased by 0.31 g, shell weight decreased by 30 mg and shell thickness index decreased by 0.57 mg/cm2 for each one-hour increase in ...
D, Backhouse, P D, Lewis, R M, Gous
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Influence of dietary osteolathyrogenson the eggshell quality of laying hens
British Poultry Science, 19981. Laying hens were fed osteolathyrogens, either semicarbazide hydrochloride at 0.3 or 0.4 g/kg or beta-aminopropionitrile fumarate at 0.5 or 0.6 g/kg diet to examine their effects on eggshell quality. 2. Shell quality characteristics considered for evaluation were shell surface area, shell thickness, shell weight, percentage shell, shape index and the
S D, Chowdhury, R H, Davis
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