Mechanical and Ultrastructural Properties of Eggshell in Two Egyptian Native Breeds of Chicken

Radwan, Lamiaa M.; Fathi, M. M.; Galal, A.; El-Dein, A. Zein

doi:10.3923/ijps.2010.77.81

Cited by 20 publications

(11 citation statements)

References 7 publications

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“…2). A camada paliçada compreende, aproximadamente, dois terços da espessura total da casca, portanto quanto maior a sua espessura, maior será a espessura total da casca e sua resistência (Radwan et al, 2010). A espessura da camada mamilar também confere característica de resistência à casca (Hunton, 1995) e, apesar de representar menos de um terço da composição total da casca, essa é a camada responsável pelo início dos processos de quebra dos ovos (Bain, 1992 Barbosa et al, 2012;Santos et al, 2015).…”

Section: Resultsunclassified

Efeito de diferentes aditivos zootécnicos sobre a qualidade de ovos em duas fases produtivas da codorna

Lemos

Calixto

Souza

et al. 2017

Arq. Bras. Med. Vet. Zootec.

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RESUMOCom o objetivo de avaliar a qualidade dos ovos de codornas alimentadas com diferentes aditivos em duas fases de produção, 360 codornas foram distribuídas em um delineamento inteiramente ao acaso, em esquema de parcela subdividida no tempo (de nove até 23 e de 24 até 39 semanas de idade), com cinco tratamentos e oito repetições de nove aves cada, organizados da seguinte forma: controle, antibiótico, prebiótico, probiótico e simbiótico. As variáveis analisadas foram: unidade Haugh, índice de gema, porcentagem dos componentes do ovo, espessura de casca medida pelo micrômetro e pelo MEV. O fornecimento dos aditivos no segundo período aumentou a unidade Haugh e nos dois períodos avaliados proporcionou aumento da porcentagem de gema e de casca e da espessura da casca e de suas membranas. A inclusão dos aditivos foi mais eficiente em aumentar o peso dos ovos e a porcentagem de gema e de casca no segundo período. A espessura da casca (MEV) melhorou após inclusão de antibiótico e simbiótico na ração no segundo período. A inclusão de aditivos na ração melhora a qualidade dos ovos de codornas durante toda a fase produtiva. Antibiótico e simbiótico são mais eficazes em melhorar a espessura da casca dos ovos produzidos durante o segundo período produtivo.

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Section: Resultsunclassified

Efeito de diferentes aditivos zootécnicos sobre a qualidade de ovos em duas fases produtivas da codorna

Lemos

Calixto

Souza

et al. 2017

Arq. Bras. Med. Vet. Zootec.

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“…The eggshells of 501 and 680 days old hens were used as morphological samples. The eggshells were cut into about 5 mm squares, and the eggshell membrane was dissolved with a mixture of 6% sodium hypochlorite, 4.12% sodium chloride, and 0.15% sodium hydroxide (Radwan et al 2010). The mammillary cores were observed at 200× magnification under a scanning electron microscope (SEM) (JCM-6000: JEOL Ltd., Japan).…”

Section: Eggshell Quality Testmentioning

confidence: 99%

Relationship Between Bone Morphology and Bone Quality in Female Femurs: Implication for Additive Risk of Alternative Forced Molting

et al. 2018

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Calcium (Ca) storage in bone has a relationship with eggshell production. Forced molting by feeding restriction for older hens improves eggshell quality but leads to a decline in the bone quality. Dietary minerals improve the eggshell and bone quality; however, the effect on bone quality post-molting has not been clarified. This study evaluated the effects of dietary Ca and minerals on the eggshell and bone quality during both pre-and post-molting periods. The bone quality was evaluated by measurement of bone density and Fourier transform infrared spectroscopy (FT-IR) analysis. The eggshell quality was evaluated by morphological observation of the mammillary cores by scanning electron microscope and FT-IR analysis. The high Ca concentration feed group showed a low bone density post-molting and a high carbonate/phosphate ratio pre-molting. In high mineral concentration feed group, the eggshell strength, the thickness, and the proportion of large mammillary core areas were significantly higher (p < 0.05) than control group post-molting. These results suggest that the eggshell strength increases as the proportion of mammillary core areas increases. Furthermore, the high carbonate/phosphate ratio promoted a decrease in bone density. Therefore, the concentration of dietary mineral is strongly related with the maintenance of eggshells and bone quality post-molting.

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“…To remove the remaining tightly bound membrane fiber, each sample was then immersed overnight in 6% sodium hypochlorite, 4.12% sodium chloride and 0.15% sodium hydroxide. Afterward, the shells were washed in water and dried at room temperature for at least 48 h according to the methodology described by Radwan et al (2010).…”

Section: Collection and Analysis Of Samples Egg Shell Qualitymentioning

confidence: 99%

“…Nascimento et al (1992) noted that all eggshell layers were significantly reduced as the age of breeder and increased erosion of the calcium reserve assembly region of the mammillary layer as the breeder hen ages could potentate separation of the mammillary layer and shell membranes. Increasing the palisade layer thickness of eggshells is important; therefore it is likely that alterations in the thickness of the palisade layer, independent of structural reorganization of the palisade columns, could affect shell strength, as the study of Radwan et al (2010) noted that the strength of the shell depends on the thickness of the palisade layer and the organization of calcite crystals in this layer. Solomon (1991) suggested that the organization of the columns of the palisade layer is one of the major determinants of the rigidity of the shell and therefore the strength, and shell resistance of the eggs.…”

Section: Effect Of Ndcp On Eggshell Ultra-structure By Scanning Electmentioning

confidence: 99%

Effect of Nano Dicalcium Phosphate Supplemetation on Eggshell Structure and Calcium and Phosphorus Utilization

El-Sheikh

Abou-Elnaga

2018

Egyptian Journal of Nutrition and Feeds

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his study was conducted to evaluate the efficiency of dietary varying levels of nano di-calcium phosphate (NDCP) on eggshell quality [total thickness (EST), mammillary layer thickness (MT), and mammillary density (MD)] egg mineral contents, bone breaking strength, serum calcium and phosphorus concentrations and calcium (Ca) and phosphorus (P) retention in old laying hen. Therefore, one hundred and eighty brown LSL hens at the age of 52 weeks of age were used for 12 weeks at the end of their production period. Hens were divided into four equal groups, 45 birds/group with nine replicates each. The treatments were as follows: Group (1): basal diet (control); Group (2): basal diet + 200g NDCP/ ton; Group (3): basal diet + 400g NDCP/ ton; and Group (4): basal diet + 800g NDCP/ ton. Results detected that serum Ca and P concentration, tibia fresh weight, tibia ash, tibia Ca, Ca and P retention were significantly increased stuck with the increase in NDCP supplementation level up to 400 g / ton and tend to decrease after that. Furthermore, Yolk mineral content (Ca and p) accumulation was significantly decreased with increasing NDCP levels. There were no significant differences in tibia breaking strength and tibia P with the supplementation in comparison with the control group. Eggshell thickness and breaking strength increased parallel to the increase in NDCP levels due to the increase in palisade layer and mammillary layer. In conclusion supplementation of NDCP up to 400 g/ ton to layers diet may be help in solving the problems of egg shell weakness at the end of egg laying season or old hen production.

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Mechanical and Ultrastructural Properties of Eggshell in Two Egyptian Native Breeds of Chicken

Cited by 20 publications

References 7 publications

Efeito de diferentes aditivos zootécnicos sobre a qualidade de ovos em duas fases produtivas da codorna

Efeito de diferentes aditivos zootécnicos sobre a qualidade de ovos em duas fases produtivas da codorna

Relationship Between Bone Morphology and Bone Quality in Female Femurs: Implication for Additive Risk of Alternative Forced Molting

Effect of Nano Dicalcium Phosphate Supplemetation on Eggshell Structure and Calcium and Phosphorus Utilization

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