EFFECTS OF VARYING DIETARY ENERGY, PROTEIN AND AMINO ACID LEVELS ON GROWTH, NUTRIENT DIGESTIBILITY, AND SERUM PROTEIN LEVELS OF EARLY WEANED PIGS

1967 ◽  
Vol 47 (1) ◽  
pp. 77-83 ◽  
Author(s):  
J. F. Standish ◽  
J. P. Bowland

Fifteen rations formulated by a factorial arrangement of 3 fat and 5 protein treatments were fed to non-castrate crossbred pigs from 3 to 9 weeks of age. Levels of 0, 4, and 8% fat and 12, 16, and 20% crude protein, and 12 and 16% crude protein with supplemental lysine and methionine to equal that present in the 20% protein diet were fed. Each increment of protein resulted in increased rate of gain. The amino acid supplemented 16% protein ration supported as rapid gain and as efficient utilization of feed as did the 20% ration. Feed intake and efficiency of feed utilization were improved as protein was raised from 12 to 16% and when lysine and methionine were added to the rations. Fat levels were not found to affect rate of gain, feed intake or efficiency of feed utilization. Apparent digestibility of nitrogen was higher in the 20% protein ration than the 12 or 16% protein rations and was also found to increase when amino acids were added to the low protein rations. More of the apparent digestible nitrogen was retained from the amino acid-supplemented rations. Increasing fat levels were found to reduce: the total serum protein levels in gilts but not in boars.

2002 ◽  
Vol 56 (4) ◽  
pp. 169-172 ◽  
Author(s):  
D Qujeq ◽  
B Laghaie ◽  
A Gholipour ◽  
N Solimani ◽  
S Hassenzadeh

1969 ◽  
Vol 23 (4) ◽  
pp. 791-804 ◽  
Author(s):  
R. F. Grimble ◽  
R. G. Whitehead

1. Weanling pigs were fed under three dietary regimens, control, low protein and total calorie restricted.2. In the protein-deficient group the amino acid ratio did not start to become elevated until growth was impaired and total serum protein and albumin concentration began to fall.3. In the protein-deficient group, but not in the control or undernourished animals, the magnitude of the ratio was statistically correlated with the rate of growth, appetite, serum protein and albumin concentration and hydroxyproline excretion.4. The results provide information on the relationship between the serum amino acid ratio and nutritional status.


1983 ◽  
Vol 63 (3) ◽  
pp. 603-611 ◽  
Author(s):  
G. P. LYNCH ◽  
C. JACKSON Jr.

The purpose of this study was to identify metabolic changes that occur at low feed intake in order to develop a method to predict the nutritional status of gestating ewes carrying single or multiple fetuses. At about the 5th week of gestation, 32 ewes were assigned equally into treatments of free choice and restricted intakes of chopped orchardgrass hay. The initial intake of each restricted ewe was determined by calculating ration amounts to supply 60% of the NRC crude protein allowance. Feed intake of each ewe was increased weekly to 80 and then to 100% of NRC crude protein allowance according to changes in the metabolites studied. Plasma citrate and nonesterified fatty acids were increased during gestation, but 3-hydroxybutyrate showed the greatest potential for indicating nutritional status of the gestating ewe. Urinary ketones appeared during the 15th week of gestation and in about one-half of the ewes on restricted intake by the 17th week of gestation. At this point, plasma 3-hydroxybutyrate was 0.53 μmol/mL and might indicate a value at which intake adjustment is needed. Total serum protein and blood urea nitrogen (BUN) were decreased by the 20th week of gestation by the ewes fed restricted intakes indicating an effect of restricted feeding on protein metabolism. Increases in both plasma β-hydroxybutyrate and urine ketone bodies by restricted feeding indicated that energy was an early limiting nutrient and that these metabolites may be useful as indicators of nutritional status. Key words: Gestating ewes, predicting nutritional requirements, citrate, nonesterified fatty acids, 3-hydroxybutyrate


1960 ◽  
Vol 21 (1) ◽  
pp. 83-89 ◽  
Author(s):  
C. P. FARTHING ◽  
JULIA GERWING ◽  
JENNIFER SHEWELL

SUMMARY The biological half-life of injected homologous 131I-γ-globulin was found to be 4·8 days in euthyroid, 5·8 days in thyroidectomized, and 3·8 days in thyroxine-treated rats. The catabolic rate of homologous γ-globulin, expressed as a percentage of the intravascular protein broken down per day, was decreased from 25·5% in normal rats to 22·5% in thyroidectomized animals, and increased to 39·2% by thyroxine treatment. Total serum protein levels were not affected by thyroxine treatment (0·02 mg/kg) in the rat, but increased after thyroidectomy. This increase was chiefly due to an increased γ-globulin level, and it is postulated that catabolism of γ-globulin in the thyroidectomized rat is decreased to a greater extent than is γ-globulin synthesis.


2013 ◽  
Vol 80 (1) ◽  
Author(s):  
Maryke L. Ferreira ◽  
Annemarie Avenant-Oldewage

The use of haematological techniques to assess fish health is generally accepted. The aim of the current study was to determine selected haematological changes that occur in Clarias gariepinus (Burchell, 1822). infected with trypanosomes. Blood films were prepared according to standard techniques to confirm trypanosome infections and whole blood was collected, the serum and plasma separated, and prepared for albumin and total protein concentration analysis. Plasma albumin levels were significantly higher in infected wild caught fish than in uninfected wild caught fish and uninfected breeding stock. Serum albumin levels were significantly lower in infected wild caught fish when compared to uninfected breeding stock. The total plasma and serum protein levels were within the normal range for C. gariepinus, that is, 3 g – 6 g/100 mL. The total plasma protein levels varied significantly between the three groups. However, the total serum protein levels were only significantly different between uninfected breeding stock and uninfected wild caught fish, as well as uninfected breeding stock and infected wild caught fish. The total protein levels were significantly higher in infected wild caught fish than in the other groups, a possible indication of an infection or inflammatory host response.


2012 ◽  
Vol 9 (2) ◽  
pp. 311-321 ◽  
Author(s):  
Baghdad Science Journal

The amount of protein in the serum depends on the balance between the rate of its synthesis, and that of its catabolism or loss. Abnormal metabolism may result from nutritional deficiency, enzyme deficiency, abnormal secretion of hormones, or the actions of drugs and toxins. Renal cancer is the third most common malignancy of the genitourinary system, and accounts for 3% of adult malignancies globally. Total serum proteins were measured in malignant kidney tumor, benign kidney tumors, and non tumoral kidney diseases patient groups, as well as in healthy individuals. A significant decrease (p< 0.001) of total serum protein levels in patients with malignant kidney tumors when compared with those of benign tumors, non tumoral diseases, and healthy individuals. The lowest serum protein levels were found in patients with stage IV, regardless their genders. Analysis of total serum proteins using PAGE revealed clear differences in the number and shape of the bands in patients with different kidney diseases compared with healthy controls.


1974 ◽  
Vol 31 (6) ◽  
pp. 1133-1134 ◽  
Author(s):  
Ibrahim H. Zeitoun ◽  
Duane E. Ullrey ◽  
Peter I. Tack

Seven separate diets ranging from 30 to 60% protein in 5% increments were fed for 10 wk to duplicate groups of rainbow trout, Salmo gairdneri, fingerlings maintained at 10 and 20‰ salinity. Water salinity and dietary protein concentration did not significantly influence total serum protein. Hematocrit increased substantially with salinity (35.3% for fish at 10 ppt and 39.1% for those at 20 ppt), whereas different levels of dietary protein were of minor consequence.


Parasitology ◽  
1985 ◽  
Vol 90 (1) ◽  
pp. 157-168 ◽  
Author(s):  
Caroline Ash ◽  
D. W. T. Crompton ◽  
P. G. Lunn

Food intake, body weight changes, serum protein and amino acid concentrations were measured during the course of primary infections of Nippostrongylus brasiliensis in rats fed on either a 2% protein (casein) diet or a 16% protein diet (Oxoid 41 B). Total serum protein concentration declined from 77·84±5·35 mg/ml in uninfected well-nourished rats to 54±3·29 mg/ml in rats at 9 days post-infection (p.i.). A reduction from 47·80±2·78 to 40·38±5·62 mg/ml had occurred in protein-malnourished rats by day 6 p.i. The hypoproteinaemia was accompanied by significant hypoalbuminaemia in the protein-malnourished rats and concentrations fell from approximately 33 to 19 mg/ml at the time of peak infection. Six days after inoculation, a significant increase was detected in the concentration of serum amino acids in both well-nourished and protein-malnourished rats; the effect was more prolonged for non-essential than for essential amino acids. The results are discussed briefly in relation to recent work on the control of protein metabolism during malnutrition.


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