Chick Embryo
Mostrando 13-24 de 412 artigos, teses e dissertações.
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13. Efeitos do horário de postura de matrizes pesadas sobre o rendimento de incubação
The effects of oviposition time, which represents different positions of the follicles in a sequence of posture, were studied on egg weight, chick weight, egg weight loss during incubation, hatchability, embryo mortality and infertility . A total of 19, 820 eggs, layed on the same day, from Cobb® broiler breeders aging 46-week-old were used. The eggs were c
Arq. Bras. Med. Vet. Zootec.. Publicado em: 2013-08
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14. Behavior of the P1.HTR mastocytoma cell line implanted in the chorioallantoic membrane of chick embryos
The P1.HTR cell line includes highly transfectable cells derived from P815 mastocytoma cells originating from mouse breast tissue. Despite its widespread use in immunogenic studies, no data are available about the behavior of P1.HTR cells in the chick embryo chorioallantoic membrane model. The objective of the present investigation was to study the effects o
Braz J Med Biol Res. Publicado em: 11/01/2013
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15. Trichomonas vaginalis and Tritrichomonas foetus: interaction with fibroblasts and muscle cells - new insights into parasite-mediated host cell cytotoxicity
Trichomonas vaginalis and Tritrichomonas foetus are parasitic, flagellated protists that inhabit the urogenital tract of humans and bovines, respectively. T. vaginalis causes the most prevalent non-viral sexually transmitted disease worldwide and has been associated with an increased risk for human immunodeficiency virus-1 infection in humans. Infections by
Mem. Inst. Oswaldo Cruz. Publicado em: 2012-09
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16. Atividade anti-angiogênica e modulação das proteínas envolvidas na neoformação vascular por compostos bioativos da própolis / Anti-angiogenic activity and modulation of protein-involved in new vases formation by propolis bioactive compounds
Propolis is rich in bioactive compounds and widely used in alternative medicine as a preventive agent and/or in therapy. We evaluate the impact of polyphenol-rich fractions of propolis from different origins and types in the angiogenesis process in atherosclerotic lesions. The following samples of propolis were used: Red (red, Alagoas, Brazil), Green (green,
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/07/2011
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17. The developmental toxicity of cottonseed extraction on chicken embryo
Cottonseed meal is widely used as one of the protein supplement in poultry diets. Its mechanism of toxic action on chicken embryo is poorly understood. In this study, direct effects and abnormalities of cottonseed on chicken embryo were studied. Oxidative stress, cholinergic stress, mineral analysis and microscopic lesions were analyzed in chicken embryo whi
Revista Brasileira de Farmacognosia. Publicado em: 22/04/2011
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18. Material particulado fino presente no ar da cidade de São Paulo promove alterações nas células de Purkinje: um estudo experimental em embrião de galinha / Urban fine particles induce alterations in Purkinje cells: an experimental study in chick embryo
Air pollutants are associated to several diseases including those related to central nervous system. The aim of this work was to evaluate the effect of urban fine particles (PM2.5) in chicken embryo Purkinje cells. A single dose of PM2.5 suspension in two different concentrations (1.5 or 20.0 Pg.100Pl-1) was injected in fresh laid fertilized eggs on E0. Cont
Publicado em: 2011
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19. Cloning and expression analysis of the transcription factor Scratch2 during the chicken early embryogenesis. / Clonagem e análise da expressão do fator de transcrição Scratch2 durante a embriogênese inicial de galinha.
In invertebrates, the Scratch (Scrt) genes encode transcription factors that promote neurogenesis during development. The Scrt function in vertebrates is unknown, but in mice Scrt1 and Scrt2 are specifically expressed in post-mitotic neurons in the embryo and in the adult central nervous system. In this work, we have cloned the coding sequence of chicken Scr
Publicado em: 2009
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20. Retina de aves como sistema circadiano e sua modulação por luz e glutamato / Avian retina as a circadian system and its modulation by light and glutamate
The avian circadian system is composed by the retina, the mammalian homolog region of the supra-chiasmatic nucleus (SNC) and the pineal gland. The retina itself shows many rhythmic physiological events, such as movements of photoreceptor cells, opsin expression, retinaldehyde re-isomerization, melatonin and dopamine production and release. Altogether these r
Publicado em: 2009
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21. Estimating the impact of environmental conditions on hatching results using multivariable analysis
Hatching results are directly related to environmental and biological surroundings. This research study aimed at evaluating the influence of incubation environmental conditions on hatchability and one-day-old chickling quality of five production flocks using multivariable analysis tool. The experiment was carried out in a commercial hatchery located in the s
Revista Brasileira de Ciência Avícola. Publicado em: 2008-12
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22. Influência da heparina na invasão de células de retina por Toxoplasma gondii
The purpose of this work was to analyze, in an in vitro model, the influence of the heparin on the susceptibility of retinal cells to infection by Toxoplasma gondii. Primary cultures of retinas from chick embryos of 8 and 11 days-old and astrocytes from human optic nerve heads were maintained in coverslips for one week, when were infected with T. gondii tach
Publicado em: 2007
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23. Effect of broiler breeder age on pancreas enzymes activity and digestive tract weight of embryos and chicks
A study was carried out to evaluate the effect of broiler breeder age on the development of the digestive tract of embryos and chicks. Fertilized eggs Cobb from 30 and 60 week-old broiler breeder was utilized in this experiment. The results showed that eggs from older (60 weeks of age) broiler breeders were heavier (p = 0.001) than those from younger (30 wee
Revista Brasileira de Ciência Avícola. Publicado em: 2004-03
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24. Effect of selection for productive traits in broiler maternal lines on embryo development
This study used 300 females and 30 males with 36 weeks of age from the selected PP and control PPc maternal broiler lines. PP has been selected for heavy body weight (PC) and high egg production for eight generations. Fertile eggs were collected and weighed individually for 4 periods of 5 consecutive days at two-week intervals. In each period, a total of 960
Revista Brasileira de Ciência Avícola. Publicado em: 2003-05