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 60 for “"eggshell"”.
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Particalized Eggshell Membrane (PEM) for Biomedical Applications
Eggshell membrane (ESM) provides a physical and bioactive barrier to protect the developing embryo. Proteomics and bioinformatics analyses have revealed that the collagen-rich ESM is composed of >500 proteins with multiple functionalities. The goal of this study was to produce novel particalized …
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The Mechanism for Calcium Carbonate Deposition in the Avian Eggshell
No abstract prepared.
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Eggshell catalyst assisted palm biodiesel production for blending of B10 blended diesel fuel
… of calcium oxide catalyst derived from waste eggshells. The temperatures used are 900°C, 920°C and 950°C. Three different samples of CaO powders were then tested with SEM for surface morphology, XRD for phase present in powders and FTIR to determine presence of bands. The best catalyst is …
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Proteomic Characterization of Eggshell Membranes and Their Effect on Poultry Physiology and Immunity
… to antibiotics, the biochemical milieu of eggshell membranes (ESM) were analyzed by using mass spectrometry techniques including matrix assisted laser desorption ionization and liquid chromatography coupled with tandem mass spectrometry (MALDI-TOF-MS and LC-MS/MS). We found more than 300 …
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U-Pb calcite dating of fossil eggshell and its impact on continental terrestrial sedimentology
… ergo U-Pb calcite age dating of fossil eggshell. Within Data Chapter One, we evaluated the reliability of elemental mapping coupled with LA-ICP-MS U-Pb calcite age dating of dinosaur eggshell recovered from Tel Ulaan Chaltsai against dinosaur eggshell from the Mussentuchit Member (Utah, …
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An investigation of ostrich eggshell bead size variability and the introduction of cup morphology
Ostrich eggshell beads are valued not only as decorations but also as important social and cultural symbols by those who create and use them. Originating in the Middle Stone Age (MSA), OES beads are still produced by several African communities. Early investigations of OES beads recovered from …
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Triple oxygen isotope measurements by tunable infrared laser direct absorption spectroscopy, and applications to ratite eggshell
… systems, it is applied to fossil ratite eggshell (RES) samples spanning the mid-Miocene through Quaternary Namib environments. A data correction scheme for relating TILDAS measurements to the VSMOW2-SLAP2 scale is also introduced. Applying this correction, analyses of the international …
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Investigation of green foamed concrete incorporating palm oil fuel ash and eggshell ash as partial cement replacement
… Oil Fuel Ash (POFA) ranging from 20% to 35% and Eggshell Ash (ESA) from 5% to 15% as partial cement replacement. The effect of partial replacement on the workability was determined by J-ring test, mechanical properties such as, compressive and tensile strengths as well as modulus of elasticity …
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Influence of egg size, eggshell quality, and hatch and placement times on the performance of broiler chickens
Small (48-54 g) and large (58-64 g) or low (≤1.070) and high specific gravity (≥1.080) eggs from broiler breeder flocks were used. The hatching sequence was divided into four periods with 25% of the chicks being hatched in each period. One-half of each group was weighed and returned to the hatcher …
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Evaluation of hydroxyapatite (HA) from waste eggshell strengthened with ultra high molecular weight polyethylene (UHMWPE) by using injection molding process
… research presents the capability of the waste eggshell as a part of material improvement for the biomedical purpose. Hydroxyapatite ceramics (HA) has been investigated because of its excellent biocompatibility and tissue bioactivity properties. HA from the waste eggshell has been extracted …
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ΣΥΓΚΡΙΤΙΚΗ ΜΕΛΕΤΗ ΤΗΣ ΧΟΡΙΟΓΕΝΕΣΗΣ ΣΕ ΕΝΤΟΜΑ ΟΙΚΟΝΟΜΙΚΗΣ ΣΗΜΑΣΙΑΣ
THE INSECT EGGSHELL (CHORION AND VITELLITE MEMBRANE) AND THE OVERLAID EPITHELIUM (FOLLICLE CELLS) HAS BEEN EXTENSIVELY USED STRUCTURALLY AND MOLECULARLY AS A MODEL SYSTEM FOR STUDIES ON CELL DIFFERENTIATION. THE MOST THOROUGHLY STUDIED EGGSHELL BELONGS TO THE FRUIT FLY DROSOPHILLA MELANOGASTER …
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The function and evolution of egg colour in birds
… This has important implications for employing eggshell pigmentation as a non-destructive bio-indicator. In Chapters 4 and 5, I conduct large-scale comparative analyses that involve the reconstruction of a super-tree including representatives of all but one avian order. In Chapter 4, I find that …
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Bestimmung der Vitamin D- Aktivität von calcinogenen Pflanzen im Wachteleischalentest
… of calcinogenic plants in the Japanese quail eggshell test In this studie the biological activity of various preparations of the calcinogenic plants Solanum glaucophyllum and Trisetum flavescens is analysed by means of the Japanese quail eggshell test. As main parameters for the evaluation of …
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Effects of dietary calcium, phytoestrogen rich diets and estrogen on intestinal calcium transport proteins, egg and eggshell quality in maturing layer hens / Ali Asghar Saki.
… is sufficient for the normal capacity of egg and eggshell production. Egg production and shell quality are significantly reduced by phytoestrogen. It is recommended that the concentration of phytoestrogen in poultry diets be investigated in more detail as it may act as an anti-nutritive factor and …
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The development of the rumen fluke, Calicophoron daubneyi, within the mammalian host
… species to form di-tyrosine crosslinks between eggshell precursor proteins during eggshell formation. Comparative sequence analysis revealed that a number of conserved tyrosines known to be crosslinked in other species have been replaced by cysteines in C. daubneyi eggshell precursor proteins …
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Eggs, incubation and hatching asynchrony in gulls
… than other pairs. Within-clutch variation in eggshell colour related to daily change of incubation behaviour. This might relate to hormonal change during egg-laying. Increase of prolactin initiates incubation and accompanies decline of steroid hormones which relate to accumulation of eggshell …
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Seasonal Changes in the Morphology of the Uterus of the Oviparous Lizard <em>Saproscincus mustelinus</em> and the Reproductively Bimodal Lizard <em>Saiphos equalis</em>.
… retention times, a decrease in thickness of the eggshell and a decrease in secretion of the uterine shell glands that are responsible for eggshell secretion. The uterine morphology of the oviparous <em>Saproscincus mustelinus</em> and the reproductively bimodal <em>Saiphos equalis</em> were …
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Pengaruh pemberian tepung kaki ayam broiler sebagai substitusi tepung ikan di dalam ransum terhadap ketebalan kerabang, kadar protein dalam albumin dan kuning telur ayam arab (Gallus turcicus)
… as well as increasing the thickness of the eggshell. This study is an experimental study using Completely Randomized Design (RAL) with 5 treatments and 4 repetition, if there are significant differences it will be followed by BNT 5%. The treatments used were broiler chicken feet flour with a …
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Biologically Inspired Engineering for Protein Stabilisation
… fact that proteins entrapped in the fossil avian eggshell crystals are well preserved up to thousands of years in Africa where high-temperature vaccine stability is needed. The persistence of the ancient intra-crystalline proteins suggests that protein incorporation into the inorganic host could …
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Osmotic balance and establishment of polarity in C. elegans embryo require cytochrome P450 CYP31A
… embryos exhibit an improperly constructed eggshell. Further functional studies have demonstrated that the defects observed in cyp31A(RNAi) embryos can be ascribed to the malfunctioning of one of the three layers of the eggshell: the lipid-rich layer, but additional problems in the …
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