Abstract Goat`s milk and its dairy products have been commonly related to important nutritional a... more Abstract Goat`s milk and its dairy products have been commonly related to important nutritional and health benefits. In fact, fat fraction is one of the most important components of goat’s milk regarding its value, as lipids are involved in cheese yield, firmness, color and flavor of goat dairy products. The aim of this study was to evaluate the modification in the lipid and sensory profile of cheeses elaborated with goat milk, through diet inclusion of sunflower oil (SFO). The main objective was to elaborate Danbo Type cheeses with increased content of conjugated linoleic acid (CLA) and transvaccenic acid (TVA), and at the same time decrease the proportion of saturated fat, and evaluate these values during the shelf life of the cheeses. The study was conducted with 60 Saanen goats separated into two homogeneous groups and supplemented for 18 days with one of two concentrates: without added oil (control, C) or enriched with sunflower oil (SFO). Cheeses were elaborated using goat milk, collected after desirable changes in its lipid profile were achieved. Physicochemical, microbiological, and fatty acid composition together with the sensory profile were evaluated. In SFO cheeses fat content increased, without affecting protein content, microbiological, sensory profile and consumer acceptability. Also, the content of TVA increased from 2.4 to 4.4 % (p
El objetivo del trabajo fue determinar el efecto de la adición de suero de queso sobre la conserv... more El objetivo del trabajo fue determinar el efecto de la adición de suero de queso sobre la conservación, la concentración de azúcares solubles y la producción de gas in vitro de ensilajes de pastura. Se evaluaron ensilajes adicionados con melaza o tres niveles de suero (2, 5 y 10 %) provenientes de tres pasturas. La producción de gas in vitro fue ajustada a un modelo exponencial simple. Todos los ensilajes presentaron características de buena conservación, pero el uso de aditivos determinó menor pH (P=0,035). La adición de melaza se asoció con mayor cantidad de azúcares solubles remanentes (P<0,001). El agregado de 2 % de suero determinó menor “a” (P<0,001), mayor “b” (P=0,010) y “a+b” (P=0,042) que los restantes ensilajes con suero. La mayor tasa de producción de gas se obtuvo con las pasturas frescas, seguidas en orden descendente por los ensilajes con melaza, con 10 % de suero, con 5 %, con 2 % y finalmente los ensilados sin aditivos. Se concluye que la adición de suero perm...
a.m. and p.m. milk samples were taken from each cow during last 2 wk of 21-d period and analyzed ... more a.m. and p.m. milk samples were taken from each cow during last 2 wk of 21-d period and analyzed for fat, protein, LCFA and somatic cell count (SCC). Dietary DMI (kg/d) was lower during second period and higher for the 10% pigeon pea diet (P < 0.05). Milk protein was higher for cows fed the 20% pigeon pea diet compared with 10% diet (P < 0.05). Milk ECM was higher for cows fed control diet compared with 10% pigeon peas (P < 0.05). Treatment had no effect on milk yield (P > 0.10). Diets did not affect ruminal fluid pH (P > 0.10); however, pH was different for sampling periods (P < 0.01). Ruminal ammonia decreased until 8h post-feeding at which time it peaked consistent with changes in ammonia concentrations that usually peak 3-5h post-feeding on diets high in plant proteins. Dietary treatments altered ruminal fluid VFA with lower concentrations of acetate and higher concentrations of propionate for the control diet, resulting in lower acetate: propionate ratio (P &l...
The Canadian veterinary journal. La revue vétérinaire canadienne, 2010
Digestibility, fecal characteristics, and levels of glucose and urea in the plasma were determine... more Digestibility, fecal characteristics, and levels of glucose and urea in the plasma were determined in 8 dogs that received 2 different dog foods once or 3 times daily. One dog food (A) was 5 times more expensive than the other (B). Fecal pH and consistency, digestibility of dry matter (DM), organic matter (OM), crude protein (CP), and crude fiber (CF) were determined. Blood samples were taken from 30 min before to 60 min after a meal. Digestibilities of DM, OM, and CP, and fecal consistency were higher, and daily fecal excretion and fecal pH were lower when dogs were fed food A (P < 0.001). The feeding schedule had no effect on plasma glucose and urea. Neither feeding X frequency nor food 3 frequency interactions was significant for the parameters studied.
Feed withdrawal (FW) is a frequent issue in open outdoor feedlot systems, where unexpected circum... more Feed withdrawal (FW) is a frequent issue in open outdoor feedlot systems, where unexpected circumstances can limit the animals’ access to food. The relationship among fasting period, animal behaviour during feed reintroduction (FR) and acidosis occurrence has not been completely elucidated. Twenty steers fitted with rumen catheters were fed a high-concentrate diet (concentrate : forage ratio 85 : 15) and were challenged by a protocol of FW followed by FR. The animals were randomly assigned to one of the four treatments: FW for 12 h (T12), 24 h (T24), 36 h (T36) or no FW (control group) followed by FR. The steers’ behaviour, ruminal chemistry, structure of the ruminal microbial community, blood enzymes and metabolites and ruminal acidosis status were assessed. Animal behaviour was affected by the FW–FR challenge ( P < 0.05). Steers from the T12, T24 and T36 treatments showed a higher ingestion rate and a lower frequency of rumination. Although all animals were suspected to have su...
Proceedings of the British Society of Animal Science
The content of water-soluble carbohydrates (WSC) in plants is variable, and depends on plant spec... more The content of water-soluble carbohydrates (WSC) in plants is variable, and depends on plant species and environment conditions. This content may be the limitation for the fermentation during silage making and also for microbial synthesis in rumen. The objective of this study was to measure the variations of the WSC in temperate forages, during autumn, in different moments of the day and in different parts of the plant.
Abstract Goat`s milk and its dairy products have been commonly related to important nutritional a... more Abstract Goat`s milk and its dairy products have been commonly related to important nutritional and health benefits. In fact, fat fraction is one of the most important components of goat’s milk regarding its value, as lipids are involved in cheese yield, firmness, color and flavor of goat dairy products. The aim of this study was to evaluate the modification in the lipid and sensory profile of cheeses elaborated with goat milk, through diet inclusion of sunflower oil (SFO). The main objective was to elaborate Danbo Type cheeses with increased content of conjugated linoleic acid (CLA) and transvaccenic acid (TVA), and at the same time decrease the proportion of saturated fat, and evaluate these values during the shelf life of the cheeses. The study was conducted with 60 Saanen goats separated into two homogeneous groups and supplemented for 18 days with one of two concentrates: without added oil (control, C) or enriched with sunflower oil (SFO). Cheeses were elaborated using goat milk, collected after desirable changes in its lipid profile were achieved. Physicochemical, microbiological, and fatty acid composition together with the sensory profile were evaluated. In SFO cheeses fat content increased, without affecting protein content, microbiological, sensory profile and consumer acceptability. Also, the content of TVA increased from 2.4 to 4.4 % (p
El objetivo del trabajo fue determinar el efecto de la adición de suero de queso sobre la conserv... more El objetivo del trabajo fue determinar el efecto de la adición de suero de queso sobre la conservación, la concentración de azúcares solubles y la producción de gas in vitro de ensilajes de pastura. Se evaluaron ensilajes adicionados con melaza o tres niveles de suero (2, 5 y 10 %) provenientes de tres pasturas. La producción de gas in vitro fue ajustada a un modelo exponencial simple. Todos los ensilajes presentaron características de buena conservación, pero el uso de aditivos determinó menor pH (P=0,035). La adición de melaza se asoció con mayor cantidad de azúcares solubles remanentes (P<0,001). El agregado de 2 % de suero determinó menor “a” (P<0,001), mayor “b” (P=0,010) y “a+b” (P=0,042) que los restantes ensilajes con suero. La mayor tasa de producción de gas se obtuvo con las pasturas frescas, seguidas en orden descendente por los ensilajes con melaza, con 10 % de suero, con 5 %, con 2 % y finalmente los ensilados sin aditivos. Se concluye que la adición de suero perm...
a.m. and p.m. milk samples were taken from each cow during last 2 wk of 21-d period and analyzed ... more a.m. and p.m. milk samples were taken from each cow during last 2 wk of 21-d period and analyzed for fat, protein, LCFA and somatic cell count (SCC). Dietary DMI (kg/d) was lower during second period and higher for the 10% pigeon pea diet (P < 0.05). Milk protein was higher for cows fed the 20% pigeon pea diet compared with 10% diet (P < 0.05). Milk ECM was higher for cows fed control diet compared with 10% pigeon peas (P < 0.05). Treatment had no effect on milk yield (P > 0.10). Diets did not affect ruminal fluid pH (P > 0.10); however, pH was different for sampling periods (P < 0.01). Ruminal ammonia decreased until 8h post-feeding at which time it peaked consistent with changes in ammonia concentrations that usually peak 3-5h post-feeding on diets high in plant proteins. Dietary treatments altered ruminal fluid VFA with lower concentrations of acetate and higher concentrations of propionate for the control diet, resulting in lower acetate: propionate ratio (P &l...
The Canadian veterinary journal. La revue vétérinaire canadienne, 2010
Digestibility, fecal characteristics, and levels of glucose and urea in the plasma were determine... more Digestibility, fecal characteristics, and levels of glucose and urea in the plasma were determined in 8 dogs that received 2 different dog foods once or 3 times daily. One dog food (A) was 5 times more expensive than the other (B). Fecal pH and consistency, digestibility of dry matter (DM), organic matter (OM), crude protein (CP), and crude fiber (CF) were determined. Blood samples were taken from 30 min before to 60 min after a meal. Digestibilities of DM, OM, and CP, and fecal consistency were higher, and daily fecal excretion and fecal pH were lower when dogs were fed food A (P < 0.001). The feeding schedule had no effect on plasma glucose and urea. Neither feeding X frequency nor food 3 frequency interactions was significant for the parameters studied.
Feed withdrawal (FW) is a frequent issue in open outdoor feedlot systems, where unexpected circum... more Feed withdrawal (FW) is a frequent issue in open outdoor feedlot systems, where unexpected circumstances can limit the animals’ access to food. The relationship among fasting period, animal behaviour during feed reintroduction (FR) and acidosis occurrence has not been completely elucidated. Twenty steers fitted with rumen catheters were fed a high-concentrate diet (concentrate : forage ratio 85 : 15) and were challenged by a protocol of FW followed by FR. The animals were randomly assigned to one of the four treatments: FW for 12 h (T12), 24 h (T24), 36 h (T36) or no FW (control group) followed by FR. The steers’ behaviour, ruminal chemistry, structure of the ruminal microbial community, blood enzymes and metabolites and ruminal acidosis status were assessed. Animal behaviour was affected by the FW–FR challenge ( P < 0.05). Steers from the T12, T24 and T36 treatments showed a higher ingestion rate and a lower frequency of rumination. Although all animals were suspected to have su...
Proceedings of the British Society of Animal Science
The content of water-soluble carbohydrates (WSC) in plants is variable, and depends on plant spec... more The content of water-soluble carbohydrates (WSC) in plants is variable, and depends on plant species and environment conditions. This content may be the limitation for the fermentation during silage making and also for microbial synthesis in rumen. The objective of this study was to measure the variations of the WSC in temperate forages, during autumn, in different moments of the day and in different parts of the plant.
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