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Effect of various protein sources and regimens for artifically rearing pigsHsu, Po-Heng January 2011 (has links)
Typescript (photocopy). / Digitized by Kansas Correctional Industries
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Response of growing swine to starter rations with skim milk, whey and varying amounts of fatStuart, James G. January 2011 (has links)
Digitized by Kansas Correctional Industries
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The effect of dietary protein level on the voluntary feed intake of sheep.Cécyre, André. January 1971 (has links)
No description available.
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Factors affecting voluntary intake of forage by ruminants.Ng Kwai Hang, Kwet Fane January 1970 (has links)
No description available.
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The effect of liquid milk replacer and calf starter rations on the growth of Holstein bull calves.Jacobs, Linda P. January 1975 (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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Novel function of spexin as a satiety factor in feeding controlWong, Ka-hei, 黃家禧 January 2013 (has links)
Spexin (SPX), also called neuropeptide Q (NPQ), is a novel neuropeptide discovered recently using the bioinformatic approach. Except for mammals, SPX has not been reported in lower vertebrates including fish and amphibians. Following its discovery, the biological functions of this peptide in both higher and lower vertebrates are still largely unknown.
To examine the structure and functions of SPX in fish model, molecular cloning of goldfish SPX has been performed and found to be highly comparable to its mammalian counterparts. In goldfish, broad expression of SPX transcripts has been found in various tissues. In vivo feeding studies have revealed that SPX mRNA levels in the telencephalon, optic tectum and hypothalamus of goldfish brain could be elevated by food intake. Brain injection of goldfish SPX, however, inhibited both basal and NPY- and orexin-induced feeding behaviour and food consumption. Similar treatment has also reduced transcript expression of NPY, AGRP and apelin with concurrent rises in CCK, CART, POMC, MCH and CRH mRNA levels in different brain areas examined. The differential effects of goldfish SPX on NPY, CCK and MCH transcript expression could also be noted in vitro in goldfish brain cell culture.
In mice, SPX has been also found to be expressed within the brain-gut axis, including the stomach and specific neuronal subpopulations within the hypothalamus, including the ARC, PVN, DMN, and VMN. Similar to goldfish, feeding has shown to affect SPX mRNA and protein expression. Fasted animals have lower SPX mRNA in the stomach, and lower SPX protein levels in the serum and glandular stomach; the opposite effects have been noted in ad libitumfed animals. Both IP and ICV injection of SPX could produce a short-term feeding inhibitory effect. Furthermore, ICV administration of SPX could also downregulate hypothalamic expression of NPY, NPY5R, AGRP, and GHSR mRNA, and upregulate leptin receptor and MC4R gene expression concurrently.
Taken together, these findings suggests that SPX may act as a satiety factor in vertebrate species. Apparently, SPX expression could be induced by feeding and the neuropeptide could act centrally to inhibit feeding by differentially regulating orexigenic and anorexigenic signals within the CNS. / published_or_final_version / Biological Sciences / Master / Master of Philosophy
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