16 research outputs found
Trifluomeprazine fed to fattening steers
The steers used in this study were good to choice grade Herefords, averaging 980 pounds, that originated in New Mexico. They had been wintered in central Kansas at a rather high level of feeding. The steers were randomly allotted, according to weight, into four groups of 10 animals each
Trace-mineral salt for steers on an all-roughage ration (Concrete shelter vs. dirt and no shelter)
Previous data collected at this station seem to indicate that supplementary dietary trace minerals may be of value under certain feeding regimes. This trial also was designed to obtain further information on the value of shelter and concrete in feeding lots.
The steers used in this study had been used in various pasture trials during the summer of 1960. After those trials were completed, the steers were fed an all-roughage maintenance ration until they were allotted to this study December 14, 1960
The use of tranquilizer compounds in fattening rations for steers.
The steers used in this fattening trial were part of a larger group used
in a wintering study reported on page 54 of Kansas Circular 358. At the beginning of the fattening period the ration was gradually changed from
a high roughage, wintering type, to a high energy, fattening type. Individual
calves remained in the same experimental groups as during the
wintering trials but the groups were moved from the outdoor lots to concrete
lots in which shelter was available
Avaliação de modelos não-lineares e da relação do consumo voluntário de vacas primÃparas e de bezerros com a curva de lactação de vacas Nelore Evaluation of non-linear models and the effects of primiparous cows and calves intake on the lactation curve of Nelore cows
Procurou-se avaliar a precisão de cinco modelos não-lineares em descrever a forma da curva de produção de leite de vacas Nelore e o efeito do consumo voluntário (CV) da vaca e do bezerro sobre a produção de leite (PL). Foram testados os modelos de Sikka, Nelder, Wood, Jenkins & Ferrell, e Jenkins & Ferrell com um parâmetro de ajustamento. Foram utilizadas 12 vacas primÃparas com peso corporal médio de 359 kg (± 8) e seus respectivos bezerros. A produção de leite foi estimada pela pesagem do bezerro antes e após a mamada, do nascimento aos 180 dias de idade. As pesagens foram efetuadas duas vezes ao dia, semanalmente, após 6 horas de jejum de lÃquido e sólidos. Os modelos não-lineares de Sikka, Jenkins & Ferrell, Nelder e Wood não descreveram a curva de lactação apropriada devido ao excesso ou subestimação d o pico da produção de leite. O melhor ajustamento foi encontrado para o modelo de Jenkins & Ferrell com um parâmetro de ajustamento. O efeito do consumo voluntário da vaca e do bezerro, avaliado separadamente, não se correlacionou com a produção de leite. Entretanto, ao avaliar o consumo da vaca e do bezerro conjuntamente, foi encontrada uma correlação positiva e negativa com a produção de leite, respectivamente. A produção de leite está intimamente correlacionada com o consumo da vaca e do bezerro, e a capacidade de ingerir sólidos não lácteos reulta na redução da necessidade de leite da mãe.<br>This research was carried out to evaluate five non-linear mathematical models to describe lactation curves of Nelore cows and effect of the cow and calf intake on milk yield. In this study we compared the models of Sikka (1950), Nelder (1966), Wood (1967), Jenkins & Ferrell (1984) and Jenkins & Ferrell (1984) with a fit parameter. Data of production were collected from 12 primiparous cows with a mean live weight of 359 kg (± 8) and its offspring. The milk production was estimated weighing the calf before and after suckling, from birth to 180 days of age. Measurements were made twice a day in a weekly period after 6 hour fasting of liquid and solids. The mathematical models of Sikka, Jenkins & Ferrell, Nelder and Wood failed to describe lactation curve appropriated due to over or underestimation of milk yield peak. Better adjustement was found for the model of Jenkins & Ferrell with a fitting parameter. Cow and calf intake evaluated separately was no correlated with milk yield. Conversely at evaluating both cow and calf together, it was found a positive and a negative correlation with milk yield, respectively. Milk yield is is closely correlated wiht cow and calf intake, and the capacity of the calf to ingest non-dairy solids results in reduction of milk needs from dam
Screening and genetic counselling for relatives of patients with breast cancer in a family cancer clinic.
Three-dimensional structure of a thermostable native cellobiohydrolase, CBH IB, and molecular characterization of the cel7 gene from the filamentous fungus, Talaromyces emersonii
C10H18N2Na2O10 inhibition and adsorption mechanism on concrete steel-reinforcement corrosion in corrosive environments
C10H18N2Na2O10 (ethylenediaminetetra-acetic acid disodium salt) inhibition and adsorption mechanism on the corrosion of steel-reinforcement corrosion in concrete immersed in corrosive environments were investigated in this paper. For this, seven different concentrations ranging from 0% to 0.667% C10H18N2Na2O10 per weight of cement were admixed in steel-reinforced concretes immersed in saline and in acidic sulphate test-media and these were monitored using electrochemical techniques. Statistical analyses of the scatter of measured data from these, as per ASTM G16-95 R04, showed that C10H18N2Na2O10 > 0% admixtures portrayed excellent efficiency at inhibiting steel-reinforcement corrosion in the saline environment. However, attaining comparably high inhibition of steel-reinforcement corrosion in concrete immersed in the acidic sulphate environment exhibited greater dependency on high C10H18N2Na2O10 admixture concentration in the steel-reinforced concretes. Different models of adsorption isotherms bear indications of chemical adsorption, chemisorptions, as the prevalent adsorption mechanism of C10H18N2Na2O10 on steel-reinforcement in both of the corrosive environments