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Dissertations / Theses on the topic 'Yolk'

Author: Grafiati

Published: 4 June 2021

Last updated: 26 July 2025

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1

Allan-Wojtas, Paula. "Ultrastructural characteristics of yolk in the chicken egg. Mechanisms for yolk absorption and its digestion by the yolk sac at different stages of embryonic development." Thesis, University of Ottawa (Canada), 1994. http://hdl.handle.net/10393/6930.

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An ultrastructural study using electron microscopy was undertaken of yolk and yolk sac to elucidate digestive mechanisms and to gather evidence to further substantiate the belief that intracellular digestion of yolk takes place in yolk sac epithelial cells during incubation. Initial work focused on the ultrastructure yolk in unincubated eggs using transmission electron microscopy of thin sections of yolk which had been fixed using conventional and novel fixatives. The next phase of the study involved the ultrastructural comparison of granules from sub-blastodermic fluid from 9 day old embryos,

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2

Hartmann, Camilla. "Selection for yolk production in laying hens /." Uppsala : Swedish Univ. of Agricultural Sciences (Sveriges lantbruksuniv.), 2001. http://epsilon.slu.se/avh/2001/91-576-5807-2.pdf.

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3

Kuhn, Hallie. "Regulation of Yolk Catabolism in Early Embryogenesis." Thesis, Harvard University, 2015. http://nrs.harvard.edu/urn-3:HUL.InstRepos:23845424.

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Yolk provides an important source of nutrients during the early development of oviparous (non-platental) organisms. In addition to phosphate and lipids, it is com- posed mainly of vitellogenin proteins packed into membrane-bound compartments called yolk platelets. Catabolism of yolk is initiated by acidification of the yolk platelet, leading to the activation of cathepsin-like proteases that degrade yolk contents, but it is unknown how this process is triggered. Using maternal shRNA technology in Drosophila melanogaster embryos we find that yolk catabolism depends on components of the Tor path

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4

Berg, Melanie Dawn. "Yolk androgens and development in American kestrel nestlings." [Boise, Idaho] : Boise State University, 2009. http://scholarworks.boisestate.edu/td/11/.

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5

Wang, Meiwen. "Advanced Yolk-Shell Nanoparticles as Nanoreactors for Catalysis." Thesis, Curtin University, 2017. http://hdl.handle.net/20.500.11937/66028.

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This thesis presents a series of works on the design, synthesis and application of yolk-shell structured nanoparticles. Several facile and efficient fabrication methods were developed to precisely control the size and shape of yolk-shell nanoparticles and they were evaluated in catalytic performances for energy related applications. Furthermore, the materials and architectures were finely tuned for improving the morphology and also the performance as yolk-shell nanoreactors. This thesis makes contributions to materials science and catalysis.

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6

Yousr, Marwa Nasr. "Bioactive properties of peptides derived from egg yolk proteins." Thesis, University of Surrey, 2014. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.616894.

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Bioactive peptides can be released, during gastrointestinal digestion or food processing, from many plant and animal proteins and represent an important source of potential health_enhancing components. Therefore, the aim of tIus study is to investigate antioxidant, anticancer and antihypertensive activities of proteins and peptides extracted from egg yolk. Defatted egg yolk (EY) was hydrolysed using pepsin and pancreatin and sequentially fractionated by ultrafiltration, followed by gel filtration (EYGF), resulting in tlu'ee different fractions of which two (EYGF-23 and EYGF-33) effectively inh

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7

Mohammed, Mansoor S. "Uptake of human immunoglobulins into the egg yolk of hens." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape8/PQDD_0004/NQ43267.pdf.

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8

Li, Xiujie. "Production, application, and stability of chicken egg yolk antibody (IgY)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0009/NQ59996.pdf.

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9

Baron-Aguilar, Claudia Catalina. "Influence of Temperature on Yolk Resorption by Centropomus undecimalis Larvae." Scholar Commons, 2011. http://scholarcommons.usf.edu/etd/2997.

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In an effort to determine the optimal temperature for rearing Centropomus undecimalis larvae during the yolk resorption period, larval development was measured under four different temperature regimes (23, 25, 28 and 31 °C). The eggs were incubated at 28 °C until hatching, which occurred at about 17 hours post-fertilization. After hatching, temperatures were adjusted to the respective treatment levels. Measurements were collected from 25 individual larvae across rearing temperatures at the following pre-determined time intervals: at hatching, 24 hours post hatch (hph), 48 hph, and 72 hph. Morp

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10

Ursell, Elizabeth. "Maternal diet and visceral yolk sac function during mouse development." Thesis, University of Southampton, 2004. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.420232.

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11

Berry, Kristin L. "QX Pup : the fascinating yolk of the Rotten Egg Nebula." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/114137.

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Thesis: S.B., Massachusetts Institute of Technology, Department of Earth, Atmospheric, and Planetary Sciences, 2013.<br>Cataloged from PDF version of thesis.<br>Includes bibliographical references (pages 31-32).<br>QX Pup is a known Mira variable at the core of the Rotten Egg Nebula that has not been studied in detail since its discovery in 1983. In this study, four years of photometric data in V and I and two years of photometric data in R and B are analyzed. A period of T = 535.4 ± 8 days, and a magnitude drop of [Delta]mI , = 2.2 ± 0.69 are measured in I, and and phase shifts between the th

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12

Liddell, Susan. "Expression of the yolk protein 3 gene of Drosophila melanogaster." Thesis, University of Edinburgh, 1989. http://hdl.handle.net/1842/11060.

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13

Martinez, Alberto. "The yolk proteins of Drosophila are conserved through Dipteran evolution." Thesis, University of Edinburgh, 1991. http://hdl.handle.net/1842/12592.

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The yolk proteins (YPs) in <i>Drosophila</i> have been shown to enter the oocyte via receptor mediated endocytosis (Mahowald, 1972; Butterworth <i>et al</i>., 1991). The YPs are sorted and specifically stored in the α-granules of the oocyte (Mahowald and Kambysellis, 1980). The aim of this project is to determine the YP domains involved in the specific interactions resulting in uptake into the oocyte. An evolutionary approach was chosen to attempt to determine these domains, since the YPs were assumed to have few evolutionary constraints and thus diverge readily. A functional assay was designe

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14

Hartfield, Perry J. "The role of glycogen in the rat visceral yolk sac." Thesis, Keele University, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.279803.

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15

Vachirachewin, Ratchaya [Verfasser]. "Thermostability of selected viruses in the presence of liquid egg yolk and distribution of virus during acetone extraction and microfiltration of egg yolk phospholipids / Ratchaya Vachirachewin." Berlin : Freie Universität Berlin, 2013. http://d-nb.info/1034073893/34.

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16

Debeb, Bisrat Godefay. "Molecular characterization of oct4-expressing yolk sac endoderm stem cell lines." [College Station, Tex. : Texas A&M University, 2008. http://hdl.handle.net/1969.1/ETD-TAMU-2657.

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17

Oliveira, Gustavo Castro de. "Variações no gene yolk em moscas das frutas do grupo fraterculus." Universidade Federal de São Carlos, 2009. https://repositorio.ufscar.br/handle/ufscar/5458.

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Made available in DSpace on 2016-06-02T20:21:21Z (GMT). No. of bitstreams: 1 2667.pdf: 1236621 bytes, checksum: 9702ce62be0433e7639201366d6444aa (MD5) Previous issue date: 2009-06-30<br>Financiadora de Estudos e Projetos<br>Species of the fraterculus group are associated to the biggest damages to fruit crops due to the fact that they attack indiscriminately green and ripe fruits, making them pests of great economic importance. These species are hard to tell apart, even showing some potential criptic species. The understanding of the populational structure and biology of this species group is

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18

Yannakis, John. "Development of IgY antibodies in egg yolk against ß-casomorphin-7." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1997. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/mq21227.pdf.

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19

Navara, Kristen J. "Yolk androgen deposition in two passerine species do females play favorites? /." Auburn, Ala., 2005. http://repo.lib.auburn.edu/2005%20Fall/Dissertation/NAVARA_KRISTEN_16.pdf.

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20

Merad, Z. "Studies of endogenous immunoglobulin transport across rabbit yolk sac and uterus." Thesis, University of Southampton, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384253.

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21

Ronaldson, Elaine. "The regulation of yolk protein 3 gene expression in Drosophila melanogaster." Thesis, University of Edinburgh, 1995. http://hdl.handle.net/1842/14316.

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In <I>Drosophila,</I> the three <I>yolk protein</I> (<I>yp</I>) genes are transcribed in a sex-, tissue- and developmentally specific manner, providing an ideal system in which to investigate the factors involved in their regulation. This project involved an analysis of the <I>yolk protein</I> <I>3</I> (<I>yp3</I>) gene and its flanking sequences in order to locate <I>cis</I>-acting DNA sequences necessary for the highly specific pattern of expression which, in the longer term, could be used to isolate the proteins interacting with them. Using P-element mediated germ-line transformation, it wa

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22

Kaufman, Irene Jennifer. "The Recovery of Protein from Egg Yolk Protein Extraction Granule Byproduct." DigitalCommons@CalPoly, 2017. https://digitalcommons.calpoly.edu/theses/1738.

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In addition to proving an excellent source of nutrients, eggs are used in the food, cosmetic, and biotechnology industries for their rheological and bioactive properties. Much of the potential for the added value is in individual components of the egg, rather than the whole egg. At low speed centrifugation, yolk separates into two distinct fractions—granules and plasma. It is becoming increasingly popular in the industry to remove the plasma fraction of the egg yolk to use for its livetins, particularly immunoglobulin Y, leaving behind a granule by-product (“yellow cake”). Previous research ha

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23

Magnusson, Emma. "Interactions between hydrophobically modified starch and egg yolk proteins in solution and at oil/water interfaces." Thesis, University of Kalmar, School of Pure and Applied Natural Sciences, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hik:diva-2006.

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<p>A common modification of starch is esterfication with anhydrous octenyl succinic acid (OSA). The modification makes the polymer surface active and it also incorporates a carboxyl group to the starch, which can be negatively charged. The characteristics of OSA starch make it interesting for usage in combination with egg yolk proteins in food emulsions. It is not only the individual ingredients that affect the product; interactions between ingredients and ingredient-dispersion medium have a great impact on factors such as structure and stability. Knowledge about how the interactions affect e

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24

Steventon, Glyn B. "The effects of alcohols on pinocytosis and proteolysis in the rat yolk sac in vitro." Thesis, Keele University, 1987. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.329133.

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25

Trout, Stephanie Williams. "Evaluation of Different Concentrations of Egg Yolk in Canine Frozen Semen Extender." Thesis, Virginia Tech, 2013. http://hdl.handle.net/10919/19238.

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This study tested different concentrations of egg yolk in canine freezing extender void of glycerol, a commonly used cryoprotectant, by examining the motility and morphology throughout the freezing process: initial (baseline after extender added), post-cool (after three hours at 5"C) and post-thaw (after freezing.) Initial values of pH, osmolarity, motility and morphology were obtained for comparison of the samples. Spermatozoa from six normal dogs as determined by progressive linear motility > 70% and normal morphology > 60% was used. Semen was collected and pooled for five freezing trials.

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26

Shajkumar, Aruni. "Yolk-Shell Nanostructures Prepared via Block Copolymer Self-Assembly for Catalytic Applications." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2018. http://nbn-resolving.de/urn:nbn:de:bsz:14-qucosa-232735.

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Yolk-shell nanostructures/yolk-shell nanoparticles are defined as a hybrid structure, a mixture of core/shell and hollow particles, where a core particle is encapsulated inside the hollow shell and may move freely inside the shell. Of the various classifications of yolk-shell nanostructures, a structure with an inorganic core and inorganic shell (inorganic/inorganic) has been studied widely due to their unique optical, magnetic, electrical, mechanical, and catalytic properties. In the work presented here, among the different inorganic/inorganic yolk-shell nanostructures noble metal@silica yolk

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27

Lee, Eun-Na. "Anti-bacterial activities of chicken egg yolk antibody, IgY, against enteric pathogens." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape2/PQDD_0005/MQ59828.pdf.

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28

Seymour, L. C. W. "The mechanism of transcellular transport of immunoglobulin G in yolk sac tissue." Thesis, Keele University, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.355615.

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29

Macherey, Laura Nicole. "Using Lipase to Improve the Functional Properties of Yolk-Contaminated Egg Whites." Thesis, Virginia Tech, 2007. http://hdl.handle.net/10919/35701.

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Egg yolk contamination of egg whites continues to be a serious problem in the egg industry. The ability of egg whites to form stable and voluminous foams is greatly inhibited by accidental yolk contamination, even at extremely small levels. Experiments were conducted to determine if lipase can regenerate the functional properties of yolk-contaminated egg whites. Treatments included control, 0.2% yolk-contamination, and 0.2% yolk-contamination that was treated with lipase and colipase and heated at 37Â°C for 1 hour. Lipase from Mucor meihei and colipase from porcine pancreas were added to y

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30

Wagner, Franziska [Verfasser], and Christian [Akademischer Betreuer] Schulz. "Cellular characterization of yolk sac-derived macrophages / Franziska Wagner ; Betreuer: Christian Schulz." München : Universitätsbibliothek der Ludwig-Maximilians-Universität, 2021. http://d-nb.info/123654398X/34.

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31

Sakuno, Mirian Maya. "Characterization of diacylglycerol oil droplets emulsified by milk and egg yolk proteins." Kyoto University, 2008. http://hdl.handle.net/2433/123967.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第14228号<br>農博第1737号<br>新制||農||964(附属図書館)<br>学位論文||H20||N4416(農学部図書室)<br>UT51-2008-Q697<br>京都大学大学院農学研究科農学専攻<br>(主査)教授松村康生, 教授内海成, 教授北畠直文<br>学位規則第4条第1項該当

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32

Chang, Huey-Huey 1962. "Dietary fat effects on egg yolk lipid composition and hepatic lipogenic enzymes." Thesis, The University of Arizona, 1990. http://hdl.handle.net/10150/277290.

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Menhaden oil, corn oil, olive oil or animal fat (1, 3, 5 or 8% of diet) effects on egg yolk fatty acids and hepatic lipogenic enzymes were studied in 35 week-old laying hens. Except for significantly lowered egg weights by menhaden oil, performance was unaffected. Yolk saturated fat remained constant (33-38% of yolk fat) regardless of fat source. Maximum o-3 fatty acid incorporation (.31 g/yolk) was reached with a deposition efficiency of 36.3% by feeding 5% menhaden oil. Yolk lipid contained.3% linolenic (C18:3o3), 1.0% eicosapentaenoic (C20:5o3), and 3.8% docosapentaenoic (C22: 5o3) acids. M

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33

UMEZU, TOMOKAZU, HIROAKI KAJIYAMA, MIKIO TERAUCHI, et al. "LONG-TERM OUTCOME AND PROGNOSTIC FACTORS FOR YOLK SAC TUMOR OF THE OVARY." Nagoya University School of Medicine, 2008. http://hdl.handle.net/2237/9649.

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34

Balasundaram, Sujatha. "A role for cappuccino and chickadee in regulation of vesicle transport during Drosophila development." Diss., The University of Arizona, 2006. http://hdl.handle.net/10150/193754.

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Establishment of polarity is a critical process that occurs early during development. In Drosophila melanogaster, axis determination occurs by localization of determinants during oogenesis. Mutations in cappuccino (capu) lead to defects in polarity establishment of both the anterior/posterior (A/P) and dorsal/ventral (D/V) axes during oogenesis. In the oocytes laid by capu mutant females, determinants that define these axes are either mislocalized or are absent. Several lines of evidence suggest that the regulation of cytoskeleton by the gene product encoded by capu is involved in Drosophila o

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35

Dunton, Anne. "The 'giant' yolk sac : an in vitro model for studying early placental transport." Thesis, University of Leicester, 1988. http://hdl.handle.net/2381/34333.

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In the rat, before the establishment of the chorioallantoic placenta, the nutritional requirements of the post-implantation embryo, are met solely by the visceral yolk sac and therefore a study of its structure and functions is essential to a full understanding of early embryonic nutrition. A method has been developed for maintaining the rat visceral yolk sac in organ culture over a prolonged period, having first removed the embryo by microsurgery at 9.5 days or alternatively allowing it to die within its own amnion. The yolk sac continues to grow as a closed vesicle, and can reach a diameter

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36

Carvalho, Lara. "The role of yolk syncytial layer and blastoderm movements during gastrulation in zebrafish." Doctoral thesis, Saechsische Landesbibliothek- Staats- und Universitaetsbibliothek Dresden, 2008. http://nbn-resolving.de/urn:nbn:de:bsz:14-ds-1200566640735-93186.

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During gastrulation, a set of highly coordinated morphogenetic movements creates the shape and internal organization of the embryo. In teleostean fishes, these morphogenetic movements involve not only the embryonic progenitor cells (deep cells) but also two extra-embryonic tissues: an outer sheet of epithelial cells (EVL) and a yolk syncytial layer (YSL). Epiboly is characterized by the spreading of the blastoderm (deep cells and EVL) to cover the large yolk cell, whereas convergence and extension leads, respectively, to mediolateral narrowing and anteroposterior elongation of the embryo. Rece

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37

林宜慧 та Yi-Hui Lin. "Investigations on the Removal of Cholesterol from Chicken Egg Yolk by β-Cyclodextrin". 碩士, 靜宜大學, 1986. http://ndltd.ncl.edu.tw/cgi-bin/gs32/gsweb.cgi/login?o=dnclcdr&s=id=%22086PU004255002%22.&searchmode=basic.

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38

Kozma, Robert Stephen. "Evolution and regulation of expression of the genes coding for Drosophila yolk proteins." Thesis, University of Edinburgh, 1985. http://hdl.handle.net/1842/12109.

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39

Palmer, Julia Claire. "Mechanisms controlling fluid-phase pinocytosis in the visceral yolk sac of the rat." Thesis, Keele University, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387233.

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40

Clark, S. A. "The mechanism of uptake and intracellular fate of leupeptin in rat yolk sacs." Thesis, Keele University, 1986. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.376309.

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41

Carvalho, Lara. "The role of yolk syncytial layer and blastoderm movements during gastrulation in zebrafish." Doctoral thesis, Technische Universität Dresden, 2007. https://tud.qucosa.de/id/qucosa%3A25041.

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During gastrulation, a set of highly coordinated morphogenetic movements creates the shape and internal organization of the embryo. In teleostean fishes, these morphogenetic movements involve not only the embryonic progenitor cells (deep cells) but also two extra-embryonic tissues: an outer sheet of epithelial cells (EVL) and a yolk syncytial layer (YSL). Epiboly is characterized by the spreading of the blastoderm (deep cells and EVL) to cover the large yolk cell, whereas convergence and extension leads, respectively, to mediolateral narrowing and anteroposterior elongation of the embryo. Rece

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42

Aminirissehei, Abdolhossein. "Passive immunization of salmonids against furunculosis and vibriosis with chicken egg yolk immunoglobulins (IGY)." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ61527.pdf.

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43

Lim, Zi-Yian. "Preparation, modification, and characterisation of Yolk-shell structure based catalysts for synthetic gas production." Thesis, University of Nottingham, 2017. http://eprints.nottingham.ac.uk/41666/.

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Hydrogen is an emerging energy carrier for oil refining and fuel cell applications. The development of an efficient and stable catalyst to produce hydrogen gas is required for industrial applications. However critical issues in the catalyst that lead to the deactivation of reactions include active metal particle growth and carbon fouling. Industrial catalysts that are frequently overwhelmed by such issues are substituted or re-treated, which is not time and cost efficient. Therefore, developing durable catalysts that are resistant to sintering and carbon fouling remains an area of interest. A

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44

Hutson, Simone Frances. "Control of ovarian and fat body expression of the Drosophila yolk protein 3 gene." Thesis, University of Edinburgh, 1998. http://hdl.handle.net/1842/15082.

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In <I>Drosophila </I>the three <I>yolk protein (yp) </I>genes are expressed in the adult female fat body and ovary. The yolk proteins (YPs) are stored in the oocyte for utilisation during embryogenesis. Within the intergenic region of <I>yp2 </I>and <I>yp2</I>, a fat body enhancer (FBE) and two ovarian enhancers have been found to direct YP1 and YP2 tissue- and sex-specific expression. The male and female forms of Doublesex protein (DSX<SUP>M</SUP> and DSX<SUP>F</SUP> respectively) have been found to bind to the FBE and are thought to confer the sex-specificity of <I>yp</I> expression to the f

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45

Kishimoto, Ippei. "Early Development of Resident Macrophages in the Mouse Cochlea Depends on Yolk Sac Hematopoiesis." Kyoto University, 2020. http://hdl.handle.net/2433/253160.

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46

MD, SYDUZZAMAN. "Non-destructive Estimation of Broiler Egg Yolk Content and Its Relationship with Hatching Time." Kyoto University, 2019. http://hdl.handle.net/2433/242918.

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Kyoto University (京都大学)<br>0048<br>新制・課程博士<br>博士(農学)<br>甲第21967号<br>農博第2357号<br>新制||農||1070(附属図書館)<br>学位論文||R1||N5218(農学部図書室)<br>京都大学大学院農学研究科地域環境科学専攻<br>(主査)教授近藤直, 准教授小川雄一, 教授清水浩<br>学位規則第4条第1項該当

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47

Zhang, Haihan. "Ontogeny and biological function of epithelial cells in the chicken yolk sac and small intestine." Diss., Virginia Tech, 2018. http://hdl.handle.net/10919/85351.

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The chicken yolk sac and small intestine are connected through the yolk stalk and share many biological similarities. During the embryonic stage, the extra-embryonic yolk sac helps the embryo to absorb nutrients primarily in the last two weeks of incubation. The chicken yolk sac physically moves yolk contents from the yolk sac to the small intestine at the end of embryogenesis. This is the time when the small intestine replaces the yolk sac in assimilating nutrients for the embryo and later for the posthatch chicken. Additionally, both chicken small intestinal epithelia and the yolk sac secret

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48

Khang, Nguyen Thi Kim. "Genetic factors affecting the omega-3 and omega-6 fatty acid variation in egg yolk." [S.l.] : [s.n.], 2006. http://deposit.ddb.de/cgi-bin/dokserv?idn=982352107.

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49

McCannel, Anne Marie. "Separation of immunoglobulins from egg yolk using metal chelate interaction chromatography and ion exchange chromatography." Thesis, University of British Columbia, 1988. http://hdl.handle.net/2429/27987.

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The immune response of chickens immunized with β-N-acetylglucosaminidase was monitored in the egg yolks of the birds using an enzyme-linked immunosorbent assay. Significantly higher levels of specific antibodies were detected in the yolks of the birds immunized with the enzyme when compared with the yolks of a control bird collected over the same period significant differences also were found in the response within the immunized group of birds, indicating individual variability to the injections. Immunoglobulins were isolated from egg yolk after a preliminary purification using alginate to pr

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50

Lung, Tina Kathy. "Analysis of Mouse EKLF/KLF2 E9.5 Double Knockout: Yolk Sac Morphology and Embryonic Erythroid Maturation." VCU Scholars Compass, 2007. http://hdl.handle.net/10156/1821.

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