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Eggshell structure,measurements,and quality-affecting factors in laying hens:a review
eggshell composition eggshell quality oviposition time genotype housing system
2016/8/1
Eggshell quality is one of the most significant factors affecting poultry industry; it economically influences egg production and hatchability. Eggshell consists of shell membranes and the true shell ...
Effects of a low-phosphorus diet and exogenous phytase on performance,egg quality,and bacterial colonisation and digestibility of minerals in the digestive tract of laying hens
layers eggshell microbial 3-phytase ileum caecum Lactobacillus spp
2015/12/17
The objective of the experiment was to determine the effects of different levels of phytase (0, 150, 250, and 350 phytase units (FTU)/kg; F) produced by Aspergillus niger in the diets of hens fed decr...
Retention of carotenoids in egg yolks of laying hens supplemented with heterotrophic Chlorella
lutein zeaxanthin enriched eggs Chlorella algae layers
2015/6/24
The present study investigated the effect of 1 and 2% feed supplementation with biomass of Chlorella grown through heterotrophic fermentation on the concentration of total and individual carotenoids i...
Interaction between oviposition time, age, and environmental temperature and egg quality traits in laying hens and broiler breeders
hen production type age temperature oviposition
2015/6/23
An experiment with laying hens and broiler breeders of two ages (young 22 vs. 36 weeks, old
83 vs. 64 weeks) and at temperatures of 20 and 28°C was carried out to evaluate the interactions between
...
The effects of diet supplemented with sodium bicarbonate upon blood pH, blood gases and eggshell quality in laying geese
feeding bicarbonate blood laying period goose
2015/2/5
The effects of diet supplemented with sodium bicarbonate (NaHCO3) upon blood pH, blood gases and eggshell quality during the laying cycle in geese were investigated. Fourteen geese aged 2 yr old were ...
Egg production, egg quality, and lipid peroxidation status in laying hens maintained at a low ambient temperature (6°C) and fed a vitamin C and vitamin E-supplemented diet
cold stress vitamin C vitamin E
2015/1/28
This experiment was conducted to evaluate the effects of vitamin C (L-ascorbic acid) and vitamin E (α-tocopherol acetate) on egg production, egg quality, lipid peroxidation status (measured as MDA), a...
Osteoclast-Like Cell Formation in Medullary Bone Marrow Cell Culture of Laying Hens
hen medullary bone osteoclast egg-laying cycle culture
2009/7/31
Marrow cells were isolated from medullary bone of hens at two opposing phases, the bone formative and resorptive phases, of the egg-laying cycle. These cells were cultured for up to 14 days on cover s...
Correlating Changes in Follicular VLDL Binding and Follicular Aromatase Activity in the Ovulation Cycle of the Laying Hen
Ovarian follicle VLDL-receptor Aromatase Ovulation cycle
2009/7/31
We examined whether very low-density lipoprotein receptors (VLDLR) on the oocyte membrane contributed to changes in VLDL uptake into the yolk by the ovarian follicle during the ovulation cycle of the ...
Changes in the Localization of MHC Class II Positive Cells in Response to Salmonella enteritidis Invasion in the Ovary of Laying Hens
follicles ovary MHC-II+ cells Salmonella enteritidis
2009/7/31
Major histocompatibility complex class II (MHC-II) molecules play essential roles in the initiation of immune responses against pathogenic agents. Salmonella enteritidis (S. enteritidis) bacteria may ...
Expressions of Antimicrobial Peptide Gallinacin-1,-2 and-3 mRNAs in the Oviduct of Laying Hens
antimicrobial peptide chicken gallinacin oviduct mRNA expressions
2009/7/31
The aim of this study was to determine the profiles of mRNA expressions of gallinacin (Gal)-1, -2 and -3, which are the antimicrobial peptides, in the oviduct of laying hens. The oviductal tissues of ...
Identification of Immunoreactive Ghrelin and its mRNA in the Oviduct of Laying Japanese Quail,Coturnix japonica
ghrelin immunocytochemistry Japanese quail oviduct RT-PCR
2009/7/31
The aim of this study was to determine whether ghrelin is produced in the oviduct of Japanese quail. Japanese quail laying hens and 20-days-old immature ones were used. The matured birds were examined...
Expression of Avian UCP and ANT in Skeletal Muscle of Cold-exposed Laying and Meat-type Chickens
UCP ANT cold exposure chicken
2009/7/31
Most bird species studied thus far have no distinct brown adipose tissue (BAT) or a related type of thermogenic tissue ; however, our recent studies on cold (4- 6°C)-acclimatized chickens suggest that...
Expression of MHC Class I and II in Growing Ovarian Follicles of Young and Old Laying Hens,Gallus domesticus
age of birds follicular growth gene expression laying hen MHC
2009/7/31
The aim of this study was to determine whether the expressions of MHC class I and II in the ovarian follicles change with follicular growth and aging of birds. Theca layer of white follicles (WF), the...
Enzyme Histochemical Localization of Peroxidase Activity in the Oviduct of Immature,Laying and Non-laying Hens
enzyme histochemistry hen oviduct peroxidase vagina
2009/7/30
Peroxidase may play roles in innate host immunity and affect the sperm survivability in hen oviduct. The aim of this study was to localize the peroxidase activity in the oviduct of hens and to examine...
Effects of Fumonisin B1 on Hematology and Serum Biochemistry of Laying Japanese Quail,Coturnix japonica
fumonisin B1 quail toxic effects
2009/7/30
A 28-d experiment was conducted to evaluate the effects of fumonisin B1 (FB1) on hematological and serum biochemical parameters of young laying Japanese quail fed fumonisin contaminated rations. To th...