Protein and amino acid metabolism in the digestive tract of growing bulls. 6. Apparent digestibility of the amino acids entering the duodenum and of amino acid from feed     

M Gabel  S Poppe 《Archives of Animal Nutrition》1986,36(6):557-569

After studies with young bulls provided with duodenal cannulas the apparent digestibility (AD) of the individual amino acids getting into the duodenum (AAD) was ascertained on the basis of 28 different rations. The AD of the AAD is defined as follows: AAD--AAfaeces/AAD X 100. The results thus obtained show a relative constancy, only insignificantly impaired by the consideration of the dependence of the AD of the AAD on the AA concentration in the ration. The average value for the AD of the sigma AAD was 72.5 +/- 4.9%. The dependence of the AD of the sigma AAD on the sigma AA concentration in the ration is: y = 67.8 + 0.51x +/- 4.6; r = 0.355x. In addition, the relation between AD AAD and AD AAfeed protein' each in % of AA intake and AA concentration in the ration, was studied and reported on.  相似文献   

Amino acid requirements of fattening pigs (castrated boars), 1. Effect of varying amino acid and energy consumption on feed efficiency in fattening     

W Wiesemüller  S Poppe  G Sieg 《Archives of Animal Nutrition》1974,24(5):397-406

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Lysine requirement of fattening boars with reference to their performance. 4. Selected quantitative characteristics of the carcass and derivation of the lysine requirement     

G Michelchen  S Poppe  W Hackl  W Wiesmüller  E Otto 《Archives of Animal Nutrition》1981,31(7-8):513-518

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Growth studies of SMR bulls under different feeding conditions. 4. Nutrient and energy retention in the body     

B Pieper  M Gabel  S Poppe  H J Papstein  F Grosse 《Archives of Animal Nutrition》1984,34(10):715-730

In long-term feeding experiments with bulls of the species Holstein-Friesians, the relation between live weight development and nutrient and energy retention was investigated on a high, medium and low level of feeding intensity. For this purpose a total of 206 animals was butchered at the ages 0, 4, 9, 12, 15, 16.5 and 18 months and the complete bodies were analysed. This showed that fat retention was considerably more influenced by the feeding intensity than protein retention. On the basis of the same body weight the energy content per kg live weight gain is not constant but increases with the growing feeding intensity.  相似文献   

Effects of nutrition on sperm production in young and stud boars. 2. Nutritional influences on sperm production in young boars     

S Poppe  U Hühn  F Kleemann  I K?nig 《Archives of Animal Nutrition》1974,24(7-8):551-565

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Influence of mechanical and thermal treatment of animal feed on the true digestibility of amino acids. 2. True digestibility of amino acids in treated horse beans]     

H Meier  T Heinz  S Poppe 《Archives of Animal Nutrition》1975,25(5):359-364

Trials were performed to investigate in which way mechanical and/or thermal treatment of horse beans would have an effect on the harmful components that were shown to be present in horse beans. In the course of these trials amino acids from heat-treated horse beans (variety Fribo) were analyzed for their true digestibility. Apart from heat-treated horse beans the investigation included undecorticated and decorticated beans and a mixture of horse beans with spring barley.  相似文献   

A review of new approaches to assessing hepatic function in animals     

Charles E. Cornelius 《Veterinary research communications》1987,11(5):423-441

Although a multitude of effective liver function tests are avaiable for use in animals, a variety of modifications of currently used tests have been recently reported. In addition, newer procedures now used in human medicine may also provide unique insights into assessing and detecting acquired hepatic disorders in animals. Examples of new procedures are: assessing microsomal mixed function oxidase activity by plasma caffeine clearance; estimating the extent of active hepatic fibrogenesis through serum procollagen-III peptide levels; determining hepatic blood flow and functional mass by the galactose elimination capacity; detecting primary hepatocellular cancer through serum or urinary ligandin levels; and to estimate the liver's maximal capacity to excrete indocyanine green independent of blood flow. In evaluating drugs as to their hepatotoxicity, function tests should be included in the liver profile which measure specific metabolic alterations unique to the compound under study.This work was supported by USPHS-NIH grants RR00169 and AM32297.  相似文献   

The energy and protein concentration of broiler rations in Cuba. 3. Male broilers in the summer     

M Valdivie  S Poppe 《Archives of Animal Nutrition》1987,37(5):417-427

A total of 1,900 male broilers of the variety White Plymouth Rock was tested with 4 energy concentrations (10.5, 11.5, 12.6 and 13.6 MJ metabolizable energy/kg) and 4 protein concentrations (15.0, 17.5, 20.0 and 22.5% CP) in their first 56 days of life in 16 test groups. The animals were kept in cages and were directly exposed to the natural Cuban summer temperatures from their 15th day of life onwards. As every test group was run with 6 repetitions, the results could be variance analytically calculated. In a comparison of the behaviour of the male animals in winter and in summer it can be stated that the animals took in between 3.4 and 25% more feed in winter than in summer. In general, a lower body protein and body fat amount could be found in all test groups in summer compared to that in winter. Feed expenditure and the utilization of energy and protein were not as good as in winter. It could be shown that both maximum live weight and live weight gain can be achieved in the 2nd fattening period in the Cuban summer if rations containing 12.6 MJ metabolizable energy and 20% CP are fed in a one-phase feeding system.  相似文献   

EXPERIMENTAL ACUTE GASTRIC DILATATION AND VOLVULUS IN THE DOG: CHANGES IN BIOCHEMICAL PARAMETERS*     

Wayne E. Wingfield  Larry M. Cornelius  Donald W. DeYoung 《Veterinary surgery : VS》1975,4(2):6-11

Acute gastric dilatation and volvulus with dilatation were produced in 11 dogs anesthetized with halothane. Blood samples were taken during these procedures for biochemical analyses. Serum potassium did not change significantly during the experimental procedure, but there was a significant increase (p<0.05) after release of the dilatation with volvulus. Renal function was impaired with significant increases (p<0.05) in the serum concentration of urea nitrogen, phosphorus, and creatinine. Evidence of cellular damage was reflected by a significant elevation (P<0.05) in glutamic-oxaloacetic transaminase activity. Serum glucose concentration increased significantly (P<0.05) during experimental gastric dilatation and dilatation with volvulus.  相似文献   

Glycosylated albumin and serum protein in diabetic dogs     

E A Mahaffey  A M Buonanno  L M Cornelius 《American journal of veterinary research》1984,45(10):2126-2128

Glycosylated albumin and glycosylated protein in serum were measured in 4 well-controlled diabetic dogs, 4 poorly controlled diabetic dogs, and 21 nondiabetic dogs. Concentrations of both glycosylated components in the well-controlled dogs were similar to those in nondiabetic dogs. Serum concentrations of glycosylated albumin and protein in the poorly controlled diabetic dogs were higher (P less than 0.001) than those of the nondiabetic and well-controlled diabetic dogs. Because of the essentially irreversible nature of the glycosylation reaction and the relatively short turnover time of albumin and other serum proteins, measurements of glycosylated serum components may provide an index of glycemia during the preceding days or weeks.  相似文献