190,102 research outputs found
Exposição de embriões de Gallus domesticus ao acetato de chumbo e seus efeitos sobre a histologia cerebelar e o comportamento no período pós-natal inicial
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Biológicas. Programa de Pós-Graduação em NeurociênciasEfeitos da exposição embrionária ao acetato de chumbo sobre a histologia cerebelar e o comportamento de Gallus domesticus no período pós-natal inicial. Quatro grupos experimentais, grupo-controle fechado (GC1), grupo-controle aberto (GC2), grupo acetato de chumbo 18,75 g e 37,5 g (GA1 e GA2), diluídos em 1ml de solução salina (0,9%). Registro do ganho de peso e do repertório comportamental, além da realização de testes de comportamento, em campo aberto e no labirinto em "T", durante a primeira semana de vida. Nossos resultados demonstraram que Gallus domesticus, nos estágios precoces de desenvolvimento embrionário, são suscetíveis à exposição ao acetato de chumbo, que provou ser capaz de alterar o desenvolvimento embrionário normal - interferindo na organização histológica do cerebelo e no comportamento normal da espécie
[coin] Antoninianus, Antiochië, Trebonianus Gallus, Romeins keizerrijk.
No full textOud plaatsnummer BRKZ.MUN.360/1/BOud plaatsnummer XXXVIIIB3Recto: De gedrapeerde buste van Trebonianus Gallus, met een kuras en stralenkroon, naar rechts ; rondom, IMP C C VIB TREB GALLVS P F AVG en een parelcirkel.Verso: De gedrapeerde Aequitas staat in vooraanzicht en kijkt naar links ; ze houdt een balans in de uitgestoken rechterhand en een cornucopia in de vouw van haar linkerarm ; rondom, A – EQVITAS AVG en een parelcirkel.Cohen, H., Description historique des monnaies frappées sous l'empire romain, communément appelées médailles impériales. Deuxième édition. Tome cinquième. Paris/London : Rollin & Feuardent, 1885, p. 237, nr. 6.Mattingly, H., Sydenham, E. & Sutherland, C., The roman imperial coinage. Vol. IV. Part III. Gordian III – Uranius Antoninus, London : Spink & Son Ltd., 1962, p. 168, nr. 80.Bijzondere collectie
[coin] Antoninianus, Mediolanum, Trebonianus Gallus, Romeins keizerrijk.
No full textOud plaatsnummer BRKZ.MUN.360/1/FOud plaatsnummer XXXVIIIB7Recto: De gedrapeerde buste van Trebonianus Gallus, met een kuras en stralenkroon, naar rechts ; rondom, IMP C C VIB TREB GALLVS AVG en een parelcirkel.Verso: De gedrapeerde Juno zit in driekwart zijaanzicht naar links ; ze houdt twee korenhalmen in de uitgestoken rechterhand en een lange scepter schuin in de vouw van haar linkerarm ; rondom, IVNO MARTIALIS en een parelcirkel.Cohen, H., Description historique des monnaies frappées sous l'empire romain, communément appelées médailles impériales. Deuxième édition. Tome cinquième. Paris/London : Rollin & Feuardent, 1885, p. 243, nr. 46.Mattingly, H., Sydenham, E. & Sutherland, C., The roman imperial coinage. Vol. IV. Part III. Gordian III – Uranius Antoninus, London : Spink & Son Ltd., 1962, p. 166, nr. 69.Sear, D. Roman coins and their values. Second revised edition. London : Seaby's Numismatic Publications Ltd, 1974, nr. 2683.Dewit, H. & Waerzeggers, R., Museum Vanderkelen-Mertens. Inventaris van de numismatische verzameling. Deel 1. De antieke munten, Leuven : 1983, nr. N/AC/458.Bijzondere collectie
The evolution of social orienting: evidence from chicks (Gallus gallus) and human newborns
No full textBackground
Converging evidence from different species indicates that some newborn vertebrates, including humans, have visual predispositions to attend to the head region of animate creatures. It has been claimed that newborn preferences for faces are domain-relevant and similar in different species. One of the most common criticisms of the work supporting domain-relevant face biases in human newborns is that in most studies they already have several hours of visual experience when tested. This issue can be addressed by testing newly hatched face-naïve chicks (Gallus gallus) whose preferences can be assessed prior to any other visual experience with faces.
Methods
In the present study, for the first time, we test the prediction that both newly hatched chicks and human newborns will demonstrate similar preferences for face stimuli over spatial frequency matched structured noise. Chicks and babies were tested using identical stimuli for the two species. Chicks underwent a spontaneous preference task, in which they have to approach one of two stimuli simultaneously presented at the ends of a runway. Human newborns participated in a preferential looking task.
Results and Significance
We observed a significant preference for orienting toward the face stimulus in both species. Further, human newborns spent more time looking at the face stimulus, and chicks preferentially approached and stood near the face-stimulus. These results confirm the view that widely diverging vertebrates possess similar domain-relevant biases toward faces shortly after hatching or birth and provide a behavioural basis for a comparison with neuroimaging studies using similar stimuli
Evolutionary relationships of Red Jungle Fowl and chicken breeds
No full textPublished results were reassessed and original data are provided regarding the origin and relatedness of four postulated chicken breed lineages, egg-type, game, meat-type and Bantam, to each other and to the basic ancestral species of jungle fowls, Gallus gallus. A system approach was employed concerning the planning of the experiments. One element of the system approach is the choice of the breeds to be compared with G. gallus. These breeds were supposed to represent major evolutionary branches of chickens. Four experiments on genetic relationships were conducted using different estimation criteria including morphological discrete characters, body measurements, biochemical markers, and the activity of serum esterase-1. The greatest similarity was found between G. gallus and the egg-type breeds of Mediterranean roots and/or true Bantams. This fact might testify that the indicated chicken groups occupied earlier stages in the evolution from the wild progenitor to the present biodiversity of chickens in the world
Caracterização morfológica de embriões de Gallus domesticus, expostos ao acetato de chumbo, com ênfase na sua ação em nível tecidual e celular na medula
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Biológicas. Programa de Pós-Graduação em Neurociências.O presente estudo caracterizou os efeitos do acetato de chumbo no desenvolvimento de embriões de Gallus domesticus, analisando a nível tecidual sua ação na medula. Os animais tratados (n=81) foram divididos em quatro grupos experimentais, conforme a dose de acetato de chumbo (150µg ou 450µg), e de acordo com o dia em que foram tratados (E3 o
Ação de fatores físicos e químicos sobre o padrão da atividade neuromuscular em embriões de Gallus domesticus
No full textDissertação (mestrado) - Universidade Federal de Santa Catarina, Centro de Ciências Biológicas. Programa de Pós-Graduação em Neurociências.Estuda o padrão dos movimentos corpóreos durante o desenvolvimento da atividade neuromuscular em embriões de Gallus domesticus, investigando possíveis alterações desencadeadas pela ação de fatores físicos e químicos, do 3º ao 10º dia de desenvolvimento embrionário
Biodiversity of 52 chicken populations assessed by microsatellite typing of DNA pools
No full textAbstract In a project on the biodiversity of chickens funded by the European Commission (EC), eight laboratories collaborated to assess the genetic variation within and between 52 populations from a wide range of chicken types. Twenty-two di-nucleotide microsatellite markers were used to genotype DNA pools of 50 birds from each population. The polymorphism measures for the average, the least polymorphic population (inbred C line) and the most polymorphic population (Gallus gallus spadiceus) were, respectively, as follows: number of alleles per locus, per population: 3.5, 1.3 and 5.2; average gene diversity across markers: 0.47, 0.05 and 0.64; and proportion of polymorphic markers: 0.91, 0.25 and 1.0. These were in good agreement with the breeding history of the populations. For instance, unselected populations were found to be more polymorphic than selected breeds such as layers. Thus DNA pools are effective in the preliminary assessment of genetic variation of populations and markers. Mean genetic distance indicates the extent to which a given population shares its genetic diversity with that of the whole tested gene pool and is a useful criterion for conservation of diversity. The distribution of population-specific (private) alleles and the amount of genetic variation shared among populations supports the hypothesis that the red jungle fowl is the main progenitor of the domesticated chicken.</p
J.-P. Boucher, Caius Cornélius Gallus, 1966
No full textBardon Henri. J.-P. Boucher, Caius Cornélius Gallus, 1966. In: Revue des Études Anciennes. Tome 68, 1966, n°3-4. pp. 506-508
J.-P. Boucher, Caius Cornélius Gallus, 1966
No full textBardon Henri. J.-P. Boucher, Caius Cornélius Gallus, 1966. In: Revue des Études Anciennes. Tome 68, 1966, n°3-4. pp. 506-508
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