Buscar
Mostrando ítems 1-10 de 477
Nitrogen excretion during embryonic development of the green iguana, Iguana iguana (Reptilia; Squamata)
(2012-10-01)
Development within the cleidoic egg of birds and reptiles presents the embryo with the problem of accumulation of wastes from nitrogen metabolism. Ammonia derived from protein catabolism is converted into the less toxic ...
Nitrogen excretion during embryonic development of the green iguana, Iguana iguana (Reptilia; Squamata)
(2012-10-01)
Development within the cleidoic egg of birds and reptiles presents the embryo with the problem of accumulation of wastes from nitrogen metabolism. Ammonia derived from protein catabolism is converted into the less toxic ...
Avaliacao da necessidade da dosagem rotineira de hematocrito, hemoglobina, ureia e creatinina sericos durante a avaliacao pre-anestesica
(1998-01-01)
Background and Objectives - There are many questions and opinions about the value of routine preoperative tests as an integral part of the preanesthetic evaluation. Current trends suggest that such tests should be based ...
Correlation Between Milk and Blood Urea Nitrogen in High and Low Yielding Dairy Cows
(2010)
A study was carried out in two dairy farms (Olocuilta and Los Conacastes)
in the central region of El Salvador. Sixty Holstein cows were
grouped according to milk yield and days in milk: high yielding
(HY, 30–90 d in ...
Lipid microspheres containing urea for slow release of non-protein N in ruminant diets
(2022-01-01)
Context: Urea is widely used in ruminant diets as a source of non-protein nitrogen (NPN), partially substituting for true protein in feed, but high levels of urea in the diet may cause toxicity. Aims: This study investigated ...
Short-term urea feeding decreases in vitro hatching of bovine blastocysts
(ELSEVIER SCIENCE INC, 2011)
Cows fed high-protein diets may have impaired reproductive performance. Although the pathogenesis has not been completely elucidated, it appears that not only the uterus, but also the follicle and oocyte, are affected by ...
The rate and pattern of urea infusion into the rumen of wethers alters nitrogen balance and plasma ammonia
(Wiley Blackwell Publishing, Inc, 2014-12)
Changes in N balance, urinary excretion of purine derivative (PD), urea, creatinine and ammonia and plasma ammonia, glucose, urea, insulin and IGF-1 were examined in four wethers (37 ± 2.6 kg BW). The animals were fitted ...
Niveles de Nitrógeno Ureico en Sangre y Leche de Alpacas Madre y Crias
(Universidad Nacional del Altiplano, 2016)