نتایج جستجو برای: in ovo feeding

تعداد نتایج: 16992488  

Journal: :International Journal of Poultry Science 2007

2007
L. Moura V. Vakharia M. Liu H. Song

A recombinant attenuated vaccine against infectious bursal disease virus (IBDV) was administered in ovo to 18-day-old embryos. The vaccine was genetically tailored to protect from challenges in the field against classic and variant strains of IBDV. The vaccine virus contains neutralizing epitopes from both classic (D78) and variant strain (GLS), and abrogates expression of the nonstructural pro...

انصاری پیرسرایی, زربخت, بی‌ پروا, پوریا, دیرنده, عیسی, سربزی فرح آباد, افسانه,

   One of the problems of the poultry industry is a lack of flocks in broiler farms Although it in the factories of hatchery broiler chickens and turkey, often Sexing chickens to are selling commercial growers, because sex differences in growth rate and feed efficiency, separating males and females to the necessary recurrence needs of uniform and specified market in terms of production carcasse...

B. Navidshad, F. Mirzaei Aghjehgheshlagh N. Hedayat Evrigh T. Mokarrami

Change in sex ratios for broiler chickens, has many economic benefits of the poultry industry. The gonads in chick embryo at an early stage have the potential to convert to both sexes (male and female). Sexual differentiation is due to aromatase expression in the left gonad in 5-6 days of the embryonic period and the production of estrogen from testosterone. Administration of aromatase inhibito...

Journal: :Journal of embryology and experimental morphology 1981
K Palén L Thörneby

Chick embryos were treated in ovo and in vitro with L-phenylalanine from the intermediate streak stage (Hamburger & Hamilton stage 3, 12-13 h of incubation) to the 7-somite stage (H & H stage 9, 29-33 h of incubation). Treatment in ovo resulted in a large number of embryos developing somite blocks, i.e. imperfectly segmented somites. In embryos treated at an early developmental stage (12-21 h o...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1988
A R Howlett V C Carter G S Martin M J Bissell

Early embryonic avian tissue is resistant to transformation by Rous sarcoma virus. To determine the nature of this resistance, we examined the expression and properties of the Rous sarcoma virus transforming protein pp60v-src, in infected embryonic chicken limbs in ovo. Lysates from Rous sarcoma virus-infected limbs contained the viral structural protein p19gag, as detected by immunoblot analys...

Journal: :Journal of animal physiology and animal nutrition 2010
L S Meriwether B D Humphrey D G Peterson K C Klasing E A Koutsos

These trials examined whether the demonstrated effects of embryonic and dietary carotenoid exposure on the inflammatory immune response in fast growing chickens also occur in slow growing chickens. The systemic and local inflammatory responses of chicks were examined in two experiments with two in ovo lutein levels (C+, carotenoid replete; or C-, carotenoid-deplete), two dietary lutein levels (...

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