Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 35 for “"Ca and P"”.
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Quantifying the Effects of Microbial Phytase and Diet Acidity on Ca and P Utilization by Weanling Pigs
… weanling pigs to determine the P (Exp. 1) and Ca (Exp. 2 and 3) equivalency values of microbial phytase based on performance, rib mineralization and P and Ca digestibility estimates, and to investigate the possible interactions of phytase and citric acid (Exp. 4 and 5). In Exp. 1, adding …
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Digestibility of calcium and phosphorus and effects of microbial phytase in diets fed to growing pigs or gestating sows
Five experiments were conducted to determine Ca digestibility in feed ingredients and to demonstrate the interactions among Ca, P, and phytase in diets fed to gestation sows or growing pigs. In Exp. 1, two experiments were conducted to test the hypothesis that standardized total tract digestibility …
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Evaluation of Particle Size Differences, Calcium Sources, and Phytases on Ph and Calcium and Phosphorus Solubility in an in Vitro Simulation of Broiler Digestion
Broiler nutrition can be affected by many different factors, and diets can be made up of a wide variety of components. Feed enzymes, different Ca sources, and various ingredient particle sizes all contribute to broiler nutritional status and need to be investigated to determine their full effects …
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Supervalorização de fitase exógena para codornas japonesas na fase de postura
… phytase overvaluation on the performance and quality of quails in laying phase. They used 336 quails Japanese females with 114 days of age, distributed in a completely casualizadocom design 6 repetitions of 8 birds each and 7 treatments, which consisted of seven diets: T1 - positive …
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Evaluation of high-protein canola meals fed to growing chicks and weanling pigs
Three experiments were conducted to determine and compare the nutritional value among 2 high-protein canola meals (CMA and CMB), conventional canola meal (CM-CV), and soybean meal (SBM). The objective of Experiment 1 was to determine P bioavailability in the canola meals and SBM relative to KH2PO4 …
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Determination of calcium and phosphorus digestibility and relative calcium bioavailability in limestone sources from different countries and interactions with phytase
… evaluate 18 limestones varying in country origin and calcium (Ca) solubility for Ca digestibility and utilization in broiler chickens. The 18 commercial limestones came from several different countries (Asia, United States, South Africa, and Europe). Sources varied in Ca concentration (32.1 to …
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Assessing hemlock woolly adelgid induced decline and susceptibility using hyperspectral technologies
… the scientific framework for using narrow band hyperspectral instruments to assess early hemlock decline and susceptibility to the introduced hemlock woolly adelgid (HWA). To this end, spectral data from an ASD FieldSpec Pro was used to develop a 6-term linear regression equation, which …
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Organic carbon and fertility of forest soils on the Allegheny Plateau of West Virginia
… National Forest in West Virginia were sampled and analyzed for soil organic and soil microbial biomass carbon as well as various fertility parameters. Additionally, vegetative biomass estimates were made at the sampling sites. The soil series sampled (established and tentative) are frigid, well …
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Requirements for digestible calcium by growing pigs
… were conducted to determine the digestible Ca requirements by pigs from 11 to 25 kg and from 50 to 85 kg as indicated by growth performance and bone ash. In Exp. 1, the hypothesis was that the requirement to maximize growth performance of 50- to 85-kg pigs expressed as the STTD Ca:STTD P …
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Using the growth patterns and geochemistry of coralline red algae to develop proxies for paleoclimate reconstruction in tropical and subarctic environments
… is to further develop the use of encrusting and free-living forms (i.e. rhodoliths) of crustose coralline red algae (CCA) as geochemical proxy sources for paleoenvironmental and paleoclimate reconstructions. Rhodoliths (Lithothamnion sp.) from the Gulf of Panama (GOP), Panama were grown in a …
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Characterization of native and bypass human coronary artery plaque deposits from the same heart: investigation of the chemical form of calcium in human coronary artery plaque deposits
Gradual deposits of lipids, proteins, and calcium on the coronary arterial walls cause atherosclerosis, leading to blockage of the blood flow and possible heart attack. Despite many studies, the mechanism underlying these processes remains unclear. In this research, differences between native and …
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The Interactive Effects of Phosporus and Calcium on Phosphorus Requirement, Utilization, and Phytase Efficacy in Poultry
… to investigate the interactive effects of P and Ca on P requirement, digestibility, utilization, and phytase efficacy. Each treatment had a minimum of 6 replications. One experiment with 3 trials was conducted to identify the nonphytate P (nPP) requirement of 0 to 14 d old broilers. The nPP …
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Reduction of minerals in feedlot diets of Nellore cattle: impacts on intake, performance, and nutrient requirements; and prediction of chemical rib section composition by dual energy x-ray absorptiometry in Zebu cattle
… rib section (rib9-11) composition through empirical equations using Dual Energy X-ray Absorptiometry (DXA). DXA is a validated method used to describe tissue composition in humans and other animals, but few studies have evaluated this technique in beef cattle, and especially in the Zebu genotype. …
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Manganese utilization as affected by excess calcium and phosphorus
… were undertaken to evaluate the effect of excess Ca and P on Mn utilization. Chick bioassays were conducted to assess the effects of various sources and varying levels and combinations of excess dietary Ca and P on Mn bioavailability. The regression of total tibia Mn on supplemental Mn intake was …
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Effect of feeding high levels of broiler litter on mineral metabolism and health of beef cows
Some cattle producers have reported metabolic disturbances in beef cows fed high levels of broiler litter. Therefore, an experiment was conducted to evaluate mineral metabolism of beef cows fed different levels of broiler litter. Sixty Angus-Hereford crossbred cows ranging in age from 3 to 12 yr …
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Effect of sodium on the chemical content of oats and wheat
Studies were conducted on oats in the greenhouse and on wheat in the field to determine the effects of varying amounts of sodium and potassium upon the yield of grain and straw and upon the concentrations in the grain and straw of the following elements: K, Na, Ca, Mg, P, N, and Mn. The experiments …
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In vitro osteoclast resorption of calcium phosphate bone substitutes
… the in vitro osteoclast (OC) resorption of calcium phosphate (CaP) biomaterials. Resorption of CaP biomaterials is traditionally assessed using an OC resorption assay where resorption pits formed on the CaP surface are analysed by microscopy techniques and quantified on the basis of pit …
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Estudo da deposição de hidroxiapatita por PEO em amostras de TI CP2 e aço inoxidável AISI 316LVM
… at higher levels of affinity between the implant and the human body, engineering focuses on studies on ceramic coating processes, surface modifications and the search for new materials. Much research has been done on the coating of metal surfaces with hydroxyapatite, due to its special …
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Calcium and Phosphorus Metabolism in Jersey and Holstein Cows During Early Lactation
… this dissertation was to assess the dynamics of calcium (Ca) and phosphorus (P) metabolism in dairy cattle. Hypocalcemia, or a drop in blood Ca, is a common condition near parturition. All cows experience some degree of hypocalcemia. Maintenance of blood Ca within the acceptable range of 8 to 10 …
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Effects of dietary Ca concentration on the performance of broiler chicks fed various sources of dietary P with and without phytase supplementation
… to determine the effects of high dietary calcium (Ca) on broiler chicks fed low phosphorus (P) diets from either nonphytate (nPP) or phytate P (PP) with or without phytase. The response criteria that were analyzed was bird performance, tibia ash, Ca and P digestibility and duodenal P …
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