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Medium-term effects of repeated exposure to stray voltage on activity, stress physiology, and milk production and composition in dairy cows Inra
Rigalma, K.; Duvaux-Ponter, C.; Barrier, A.; Charles, C.; Ponter, A.; Deschamps, F.; Roussel, S..
The medium-term effects of permanent or random exposure to stray voltage applied to the water trough were evaluated on milk production and stress physiology in lactating dairy cows. Seventy-four Holstein cows were assigned during two 8-wk experimental periods to 1 of 3 treatments. The treatments were permanent exposure to voltage (PERM, 1.8 V, n = 23) applied to the water trough, random exposure to voltage (RAND, 1.8 V, 36 h/wk, n = 25), and no exposure to voltage (control, n = 26). On the first day of voltage exposure, PERMcows had higher activity levels than control cows (9.8 ± 2.70 vs. −2.3 ± 2.74 14-s periods of movement/h). During the eighth week of exposure, RAND cows had higher activity levels than control cows (4.2 ± 3.64 vs. −7.7 ± 3.54 14-s...
Tipo: Journal Article Palavras-chave: STRAY VOLTAGE; DAIRY COW; UNPREDICTABILITY; CHRONIC STRESS; TENSIONS PARASITES; VACHE LAITIERE; IMPREVISIBIBITE; STRESS CHRONIQUE .
Ano: 2010 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD2011b7d47489&uri=/notices/prodinra1/2011/06/
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Patterning of palatal rugae through sequential addition reveals an anterior/posterior boundary in palatal development Inra
Pantalacci, S.; Prochazka, J.; Martin, A.; Rothova, M.; Lambert, A.; Bernard, L.; Charles, C.; Viriot, L.; Peterkova, R.; Laudet, V..
Background: The development of the secondary palate has been a main topic in craniofacial research, as its failure results in cleft palate, one of the most common birth defects in human. Nevertheless, palatal rugae (or rugae palatinae), which are transversal ridges developing on the secondary palate, received little attention. However, rugae could be useful as landmarks to monitor anterior/posterior (A/P) palatal growth, and they provide a simple model of mesenchymal-epithelial structures arranged in a serial pattern.Results: We first determined in which order the nine mouse rugae appear during development. Our results revealed a reiterative process, which is coupled with A/P growth of palatal shelves, and by which rugae 3 to 7b are sequentially...
Tipo: Journal Article Palavras-chave: FENTE PALATINE; POLARITÉ DÉVELOPPEMENT; DÉVELOPPEMENT EMBRYONNAIRE.
Ano: 2008 URL: http://www.prodinra.inra.fr/prodinra/pinra/doc.xsp?id=PROD200945f42261&uri=/notices/prodinra1/2009/12/
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