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The role of fat in the growing chickJames, Thomas Milton January 2011 (has links)
Typescript, etc. / Digitized by Kansas State University Libraries
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Effects of age and diet on exocrine pancreas function and fat digestibility in poultry.Lumbuenamo, Sita Ntula. January 1989 (has links)
Three experiments were conducted to study changes in exocrine pancreas function in relation to age, dietary fat and digestibility in poultry. In the first experiment, 120 White Leghorn and 120 Hubbard chicks were fed a basal diet with or without 5% animal fat. Total units of lipase, amylase, trypsin and chymotrypsin activities in pancreas increased linearly with age in Hubbards from 2 to 29 days, but plateaued after 16 days in Leghorns. Hubbards showed higher total pancreatic lipase, amylase, trypsin and chymotrypsin activities compared with Leghorns. Addition of 5% dietary fat significantly increased total lipase activity in pancreas, but decreased total amylase activity. Added fat had no well defined effect on total pancreatic trypsin and chymotrypsin activities. Fat digestibility in Leghorns fed the low fat diet increased significantly from 14 to 30 days of age, but not in Leghorns fed the high fat diet; while Hubbards fed both diets showed a significant decrease in fat digestibility. Fat digestibility was increased with added fat in both breeds. No direct correlation was found between nutrient digestibility and corresponding enzyme activity. In the second experiment, 80 young White Leghorn hens were fed a basal diet with or without 5% animal fat. Fat supplementation did not generally significantly affect lipase activities, but total lipase activity in pancreas decreased after 10.6 and increased after 12.7 mo in pancreata of birds fed both diets and fed the high fat diet, respectively. Fat digestibility was not affected by age, but was higher with fat supplementation. In the third experiment, 96 older White Leghorn hens were fed a basal diet with or without 5% animal fat. Total pancreatic lipase activity showed a U-shaped curve with the lowest value at 15.7 mo and increased after 15.7 mo following either natural or force molting. Fat supplementation did not significantly affect lipase activities. Amylase, trypsin and chymotrypsin activities decreased with age from 10.2 to 15.7 mo, but were increased with fat supplementation. Fat digestibility was not affected by age, but was significantly higher with fat supplementation.
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THE EFFECT OF TALLOW ON TRUE METABOLIZABLE ENERGY OF SOME POULTRY FEEDSTUFFS (TME).Al-Hozab, Adel Abdullah. January 1985 (has links)
No description available.
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Adaptation of protein concentrates in the laying rationClements, Joseph Hamilton January 1952 (has links)
No description available.
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Manganese and zinc utilization by laying hens.Goh, Yeow Kwang January 1972 (has links)
No description available.
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Influence of supplemental dietary fat on the growth and the relative proportions of three classes of lipid in the epiphyseal cartilage of dwarf and non-dwarf chicks.Kensett, Beverley C. January 1978 (has links)
No description available.
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Evaluation of intermittent lighting as a method to reduce feed consumption of egg and meat-type pullets during the growing period.Goldrosen, Alan. January 1975 (has links)
No description available.
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Dietary energy manipulation on fat deposition and metabolism in broilersZhong, Cheng 07 December 1990 (has links)
The objective of this work was to define the effects of
dietary energy intake on broiler fat deposition and
metabolism. Fatty broilers are one of the major problems in
the broiler industry.
The effects of changing calorie to protein (Cal/Pr)
ratios, and the addition of cellulose or dried distiller's byproduct
(DDBP) in the diet, on abdominal fat deposition, liver
lipogenesis and glucose oxidation and broiler performance
indicated that the mean body weight of broilers fed narrower
Cal/Pr ratio diets (124 and 143 for starter and grower,
respectively) were lower (P<.01) than broilers fed diets with
mid-Cal/Pr ratios (138 and 160) and wide Cal/Pr ratios (147
and 171). Feed conversion was better (P<.01) for broilers fed
the diet with wide Cal/Pr ratio than the broilers fed the diet
with narrow Cal/Pr ratio. Abdominal fat deposition increased
(P<.001) with wide Cal/Pr ratio than narrow Cal/Pr ratio. No
significant differences were found in in vitro liver
lipogenesis and glucose oxidation when Cal/Pr ratio was
widened. Mean body weight, feed conversion and abdominal fat
levels of broilers fed 5% cellulose or 10% DDBP diets were not
different when compared to broilers fed diets with the same
Cal/Pr ratio without these two feed ingredients.
The time-course of the deposition of abdominal fat
fitted a negative exponential growth curve. The data also
indicated that the highest potential for abdominal fat
deposition was during the first two weeks of age. When the
feed intakes of broilers were restricted for a 6 day period
beginning at 1, 2, 3 and 4 weeks of age, the feed efficiencies
of all the restricted broilers were significantly improved
compared with broilers fed ad libitum. No significant
differences were observed in mean body weight between the
different treatments. The percentage of abdominal fat in
broilers restricted-fed starting either at 1 or 2 weeks old
for a 6-day period were lower (P<.05) than broilers fed ad
libitum. Feed restriction from days 7 to 12 reduced the
adipocyte size but not the number. Feed restriction decreased
(P<.05) lipogenesis at 2 and 8 weeks of age. No significant
effects were found in lipolysis between the restricted and ad
libitum-fed broilers. These studies demonstrate that early
feed restriction (days 7 to 12) reduced abdominal fat
deposition which is attributed to the reduction in the
adipocyte size. Smaller size adipocyte resulted from
decreased activity of lipogenesis. / Graduation date: 1991
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THE EFFECTS OF CHELATES AND VITAMIN-D3 ON TRACE-MINERAL UTILIZATIONSavage, Stanley Irwin, 1945- January 1972 (has links)
No description available.
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Green Feeds and Green Feed Substitutes for Arizona PoultryRowe, Clyde F. 06 1900 (has links)
This item was digitized as part of the Million Books Project led by Carnegie Mellon University and supported by grants from the National Science Foundation (NSF). Cornell University coordinated the participation of land-grant and agricultural libraries in providing historical agricultural information for the digitization project; the University of Arizona Libraries, the College of Agriculture and Life Sciences, and the Office of Arid Lands Studies collaborated in the selection and provision of material for the digitization project.
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